U.S. patent application number 15/019215 was filed with the patent office on 2017-08-10 for surgical instruments with non-symmetrical articulation arrangements.
The applicant listed for this patent is Ethicon Endo-Surgery, LLC. Invention is credited to Jason L. Harris, Morgan R. Hunter, Frederick E. Shelton, IV, Lauren S. Weaner, Austin E. Wise, Sarah A. Worthington.
Application Number | 20170224332 15/019215 |
Document ID | / |
Family ID | 62234672 |
Filed Date | 2017-08-10 |
United States Patent
Application |
20170224332 |
Kind Code |
A1 |
Hunter; Morgan R. ; et
al. |
August 10, 2017 |
SURGICAL INSTRUMENTS WITH NON-SYMMETRICAL ARTICULATION
ARRANGEMENTS
Abstract
A surgical instrument that comprises an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
relative thereto about an articulation axis that is laterally
offset from the shaft axis and extends transversely relative
thereto. An end effector driver link is operably coupled to the
surgical end effector and an articulation driver that is supported
for longitudinal travel in distal and proximal directions upon
application of articulation motions thereto. A flexible
de-articulation member is coupled to the elongate shaft assembly
and the surgical end effector to apply de-articulation motions to
the surgical end effector.
Inventors: |
Hunter; Morgan R.;
(Cincinnati, OH) ; Shelton, IV; Frederick E.;
(Hillsboro, OH) ; Harris; Jason L.; (Lebanon,
OH) ; Worthington; Sarah A.; (Angola, IN) ;
Wise; Austin E.; (Cincinnati, OH) ; Weaner; Lauren
S.; (West Chester, OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Ethicon Endo-Surgery, LLC |
Guaynabo |
PR |
US |
|
|
Family ID: |
62234672 |
Appl. No.: |
15/019215 |
Filed: |
February 9, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61B 2017/00424
20130101; A61B 2017/2943 20130101; A61B 2034/715 20160201; A61B
2017/00398 20130101; A61B 2017/0046 20130101; A61B 2017/07285
20130101; A61B 2017/00407 20130101; A61B 2017/2936 20130101; A61B
2090/0808 20160201; A61B 90/30 20160201; A61B 2017/07271 20130101;
A61B 17/00234 20130101; A61B 2017/00862 20130101; A61B 2017/2908
20130101; A61B 17/07207 20130101; A61B 17/072 20130101; A61B
2017/00473 20130101; A61B 2017/00734 20130101; A61B 17/105
20130101; A61B 17/068 20130101; A61B 2017/07278 20130101; A61B
17/32 20130101; A61B 2017/293 20130101; A61B 2017/2927
20130101 |
International
Class: |
A61B 17/068 20060101
A61B017/068; A61B 17/32 20060101 A61B017/32; A61B 17/10 20060101
A61B017/10 |
Claims
1. A surgical instrument, comprising: an elongate shaft assembly
defining a shaft axis; a surgical end effector pivotally coupled to
said elongate shaft assembly for selective articulation relative to
said elongate shaft assembly about an articulation axis that is
transverse to, and laterally offset from, said shaft axis said
surgical end effector defining an end effector axis, said surgical
end effector configured to be selectively articulated between an
unarticulated position wherein said effector axis is axially
aligned with said shaft axis to a maximum articulated position on
one side of said shaft axis wherein said end effector axis is
perpendicular to said shaft axis; and an articulation system
operably interfacing with said surgical end effector to selectively
move said surgical end effector between said unarticulated position
and said articulated positions.
2. The surgical instrument of claim 1, wherein said articulation
system comprises an articulation drive member operably coupled to
said surgical end effector for selectively applying pushing and
pulling motions thereto.
3. The surgical instrument of claim 1, wherein said articulation
system comprises a de-articulation member configured to selectively
only apply a pulling motion to said surgical end effector.
4. The surgical instrument of claim 1, wherein said articulation
system comprises: an end effector driver link coupled to said
surgical end effector; and a distal articulation driver coupled to
said end effector driver link and configured to selectively apply a
pushing motion and a pulling motion thereto; and a de-articulation
member attached to said surgical end effector and configured to
only apply a pulling motion thereto.
5. The surgical instrument of claim 1, wherein said articulation
system comprises: an end effector driver link coupled to said
surgical end effector; a distal articulation driver coupled to said
end effector driver link and configured to selectively apply a
pushing motion and a pulling motion thereto; and a de-articulation
member configured to apply a de-articulation motion to said
surgical end effector.
6. The surgical instrument of claim 5, wherein said surgical end
effector is pivotally coupled to said elongate shaft assembly by a
spring pin that defines said articulation axis and which is
configured to apply a de-articulation biasing motion to said
surgical end effector.
7. A surgical instrument, comprising: an elongate shaft assembly
defining a shaft axis; a surgical end effector defining an end
effector axis; an articulation joint configured to facilitate
articulation of said surgical end effector relative to said
elongate shaft assembly between an unarticulated position wherein
said end effector axis is axially aligned with said shaft axis and
a fully articulated position wherein said end effector axis is
perpendicular to said shaft axis; and means for applying an
articulation motion to said surgical end effector, said means for
applying positioned only along one lateral side of said shaft
axis.
8. The surgical instrument of claim 7, wherein a proximal end of
said surgical end effector is angled relative to said end effector
axis and wherein a distal end of said elongate shaft assembly is
angled relative to said shaft axis.
9. The surgical instrument of claim 8, wherein said proximal end of
said surgical end effector is oriented at an end effector angle
relative to said end effector axis and wherein said distal end of
said elongate shaft assembly is oriented at a shaft angle relative
to said shaft axis.
10. The surgical instrument of claim 9, wherein said end effector
angle and said shaft angle are equal to each other.
11. The surgical instrument of claim 7, further comprising means
for applying a de-articulation motion to said surgical end
effector.
12. A surgical instrument, comprising: an elongate shaft assembly
defining a shaft axis and comprising a distal end; a surgical end
effector comprising a proximal end that is pivotally coupled to
said distal end of said elongate shaft assembly for selective
pivotal travel relative thereto about an articulation axis that is
laterally offset from said shaft axis and extends transversely
relative thereto; and an articulation system, comprising: an end
effector driver link operably coupled to said surgical end
effector; an articulation driver supported for longitudinal travel
in distal and proximal directions upon application of articulation
motions thereto, said articulation driver coupled to said end
effector driver link to selectively articulate said surgical end
effector relative to said elongate shaft assembly about said
articulation axis; and a flexible de-articulation member coupled to
said elongate shaft assembly and said surgical end effector to
apply de-articulation motions to said surgical end effector.
13. The surgical instrument of claim 12, wherein said articulation
driver is configured to apply a first articulation motion to said
surgical end effector only in one articulation direction that is
transverse to said shaft axis.
14. The surgical instrument of claim 12, wherein said surgical end
effector defines an end effector axis and wherein said end effector
is movable between an unarticulated position wherein said effector
axis is axially aligned with said shaft axis to a maximum
articulated position on one lateral side of said shaft axis wherein
said end effector axis is perpendicular to said shaft axis.
15. The surgical instrument of claim 12, wherein said articulation
driver and said end effector driver link are located on one lateral
side of said shaft axis when said surgical end effector is in an
unarticulated orientation.
16. The surgical instrument of claim 12, wherein said surgical end
effector comprises a firing member that is configured for axial
travel within said surgical end effector and wherein said elongate
shaft assembly further comprises an axially movable firing beam
operably interfacing with said firing member and being selectively
movable in said distal direction in response to a firing motion
applied thereto, said firing beam being selectively movable in said
proximal direction in response to a retraction motion applied
thereto.
17. The surgical instrument of claim 12, wherein said proximal end
of said surgical end effector is pivotally pinned to said distal
end of said elongate shaft assembly by an articulation pin and
wherein said flexible de-articulation member is configured to flex
around said articulation pin when said surgical end effector is
articulated about said articulation axis.
18. The surgical instrument of claim 12, wherein said proximal end
of said surgical end effector is angled relative to said end
effector axis and wherein said distal end of said elongate shaft
assembly is angled relative to said shaft axis.
19. The surgical instrument of claim 18, wherein said proximal end
of said surgical end effector is oriented at an end effector angle
relative to said end effector axis and wherein said distal end of
said elongate shaft assembly is oriented at a shaft angle relative
to said shaft axis.
20. The surgical end effector of claim 19, wherein said end
effector angle and said shaft angle are equal to each other.
Description
BACKGROUND
[0001] The present invention relates to surgical instruments and,
in various embodiments, to surgical stapling and cutting
instruments and staple cartridges for use therewith.
[0002] A stapling instrument can include a pair of cooperating
elongate jaw members, wherein each jaw member can be adapted to be
inserted into a patient and positioned relative to tissue that is
to be stapled and/or incised. In various embodiments, one of the
jaw members can support a staple cartridge with at least two
laterally spaced rows of staples contained therein, and the other
jaw member can support an anvil with staple-forming pockets aligned
with the rows of staples in the staple cartridge. Generally, the
stapling instrument can further include a pusher bar and a knife
blade which are slidable relative to the jaw members to
sequentially eject the staples from the staple cartridge via
camming surfaces on the pusher bar and/or camming surfaces on a
wedge sled that is pushed by the pusher bar. In at least one
embodiment, the camming surfaces can be configured to activate a
plurality of staple drivers carried by the cartridge and associated
with the staples in order to push the staples against the anvil and
form laterally spaced rows of deformed staples in the tissue
gripped between the jaw members. In at least one embodiment, the
knife blade can trail the camming surfaces and cut the tissue along
a line between the staple rows.
[0003] The foregoing discussion is intended only to illustrate
various aspects of the related art in the field of the invention at
the time, and should not be taken as a disavowal of claim
scope.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] Various features of the embodiments described herein,
together with advantages thereof, may be understood in accordance
with the following description taken in conjunction with the
accompanying drawings as follows:
[0005] FIG. 1 is a perspective view of a surgical instrument and an
elongate shaft assembly embodiment;
[0006] FIG. 2 is an exploded assembly view of the handle or housing
portion of the surgical instrument of FIG. 1;
[0007] FIG. 3 is an exploded assembly view of a portion of an
elongate shaft assembly;
[0008] FIG. 4 is another exploded assembly view of another portion
of the elongate shaft assembly of FIG. 3;
[0009] FIG. 5 is an exploded assembly view of a portion of a
surgical end effector embodiment and closure sleeve embodiment;
[0010] FIG. 6 is a partial cross-sectional view of a portion of the
surgical end effector and closure sleeve arrangement of FIG. 5;
[0011] FIG. 7 is a perspective view of the surgical end effector
and closure sleeve arrangement of FIGS. 5 and 6 with the anvil
thereof in an open position or configuration;
[0012] FIG. 8 is another perspective view of the surgical end
effector and closure sleeve arrangement of FIGS. 5-7 with the anvil
thereof in a closed position or configuration;
[0013] FIG. 9 is a perspective view of a surgical end effector and
elongate shaft assembly embodiment with portions thereof omitted
for clarity;
[0014] FIG. 10 is a top view of portions of the surgical end
effector and elongate shaft assembly embodiment of FIG. 9 with the
surgical end effector in an articulated position or
configuration;
[0015] FIG. 11 is a partial exploded assembly view of portions of
the surgical end effector and elongate shaft assembly embodiment of
FIGS. 9 and 10;
[0016] FIG. 12 is a top view of portions of the surgical end
effector and elongate shaft assembly of FIGS. 9-11;
[0017] FIG. 13 is a perspective view of portions of the surgical
end effector and elongate shaft assembly embodiment of FIGS. 9-12
with the surgical end effector in an articulated position or
configuration;
[0018] FIG. 14 is a top view of portions of the surgical end
effector and elongate shaft assembly embodiment of FIGS. 9-13 with
the surgical end effector in an articulated configuration and with
some of the components thereof shown in cross-section for
clarity;
[0019] FIG. 15 is a perspective view of a portion of another
elongate shaft assembly embodiment;
[0020] FIG. 16 is another perspective view of the elongate shaft
assembly embodiment of FIG. 15 with the closure sleeve and closure
sleeve components omitted for clarity;
[0021] FIG. 17 is a top view of portions of the elongate shaft
assembly embodiment of FIGS. 15 and 16;
[0022] FIG. 18 is a cross-sectional side elevational view of the
elongate shaft assembly embodiment of FIGS. 15-17 with a surgical
staple cartridge mounted in the surgical end effector portion;
[0023] FIG. 19 is another cross-sectional side elevational view of
the elongate shaft assembly of FIGS. 15-18 with a surgical staple
cartridge mounted in the surgical end effector portion;
[0024] FIG. 20 is a top view of portions of the surgical end
effector and elongate shaft assembly of FIGS. 15-19 with the
surgical end effector in an articulated position or
configuration;
[0025] FIG. 20A is a side elevational view of a portion of another
surgical end effector and closure sleeve embodiment;
[0026] FIG. 21 is a perspective view of another surgical end
effector and elongate shaft assembly embodiment with portions
thereof omitted for clarity;
[0027] FIG. 22 is an exploded assembly view of portions of the
surgical end effector and elongate shaft assembly embodiment of
FIG. 21;
[0028] FIG. 23 is a top view of portions of the surgical end
effector and elongate shaft assembly embodiment of FIGS. 21 and
22;
[0029] FIG. 24 is another top view of the portions of the surgical
end effector and elongate shaft assembly embodiment of FIGS. 21-23
with portions thereof omitted for clarity;
[0030] FIG. 25 is another top view of the portions of the surgical
end effector and elongate shaft assembly embodiment of FIGS. 21-24
with the surgical end effector in an articulated position or
configuration;
[0031] FIG. 26 is an exploded perspective view of a portion of
another elongate shaft assembly embodiment;
[0032] FIG. 27 is an exploded assembly view of portions of another
surgical end effector and elongate shaft assembly embodiment;
[0033] FIG. 28 is a partial perspective view of a portion of the
elongate shaft assembly embodiment of FIG. 27 with portions thereof
omitted for clarity;
[0034] FIG. 29 is another partial perspective view of portions of
the elongate shaft assembly embodiment of FIGS. 27 and 28 with
portions thereof omitted for clarity;
[0035] FIG. 30 is another partial perspective view of portions of
the elongate shaft assembly embodiment of FIGS. 27-29 with portions
thereof omitted for clarity;
[0036] FIG. 31 is a top view of portions of the surgical end
effector and elongate shaft assembly embodiment of FIGS. 27-30 with
portions thereof omitted for clarity;
[0037] FIG. 32 is another top view of portions of the surgical end
effector and elongate shaft assembly embodiment of FIGS. 27-31 with
portions thereof omitted for clarity and with the surgical end
effector in an articulated position or configuration;
[0038] FIG. 33 is a side elevational view of portions of the
surgical end effector and elongate shaft assembly embodiment of
FIGS. 27-32 with portions thereof omitted for clarity;
[0039] FIG. 34 is a perspective view of portions of the surgical
end effector and elongate shaft assembly embodiment of FIGS. 27-33
with portions thereof omitted for clarity;
[0040] FIG. 35 is another partial perspective view of portions of
the surgical end effector and elongate shaft assembly embodiment of
FIGS. 27-34 with portions thereof omitted for clarity;
[0041] FIG. 36 is an exploded assembly view of portions of a distal
firing beam assembly embodiment and lateral load carrying member
embodiments;
[0042] FIG. 37 is a perspective view of the distal firing beam
assembly and lateral load carrying members of FIG. 36;
[0043] FIG. 38 is an enlarged cross-sectional view of portions of
the distal firing beam assembly and lateral load carrying members
of FIGS. 36 and 37;
[0044] FIG. 39 is another cross-sectional view of the distal firing
beam assembly and lateral load carrying members of FIGS. 36-38;
[0045] FIG. 40 is a side elevational view of a portion of a distal
firing beam assembly embodiment attached to a firing member
embodiment;
[0046] FIG. 41 is a top view of a portion of the distal firing beam
assembly embodiment and firing member embodiment of FIG. 40;
[0047] FIG. 42 is a cross-sectional view of a portion of the distal
firing beam assembly embodiment of FIGS. 40 and 41 with lateral
load carrying members journaled thereon and with the distal firing
beam assembly embodiment in a flexed position or configuration;
[0048] FIG. 43 is a perspective view of the distal firing beam
assembly embodiment and lateral load carrying embodiments of FIG.
42;
[0049] FIG. 44 is a perspective view of portions of another
surgical end effector embodiment and elongate shaft assembly
embodiment with portions thereof omitted for clarity and with the
surgical end effector in an articulated position or
configuration;
[0050] FIG. 45 is a top view of the surgical end effector
embodiment and elongate shaft assembly embodiment of FIG. 44;
[0051] FIG. 46 is another top view of the surgical end effector
embodiment and elongate shaft assembly embodiment of FIG. 45 with
portions of the pivot link thereof shown in cross-section;
[0052] FIG. 47 is a partial perspective view of portions of another
surgical end effector embodiment and elongate shaft assembly
embodiment with portions thereof omitted for clarity;
[0053] FIG. 48 is a top view of portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
47 with portions thereof omitted for clarity;
[0054] FIG. 49 is another top view of the surgical end effector
embodiment and elongate shaft assembly embodiment of FIG. 48;
[0055] FIG. 50 is a top perspective view of portions of the
surgical end effector embodiment and elongate shaft assembly
embodiment of FIGS. 47-49 with portions thereof omitted for clarity
and the surgical end effector in an articulated position or
configuration;
[0056] FIG. 51 is another top perspective view of portions of the
surgical end effector embodiment and elongate shaft assembly
embodiment of FIG. 50;
[0057] FIG. 52 is an enlarged perspective view of portions of the
surgical end effector embodiment and elongate shaft assembly
embodiment of FIG. 51;
[0058] FIG. 53 is a top view of portions of another surgical end
effector embodiment and elongate shaft assembly embodiment with
portions thereof omitted for clarity and illustrating the surgical
end effector in an unarticulated position or configuration and an
articulated position or configuration;
[0059] FIG. 54 is a top view of a portion of the elongate shaft
assembly embodiment of FIG. 53 with the articulation system in a
neutral or unarticulated position or configuration and with
portions of the elongate shaft assembly omitted for clarity;
[0060] FIG. 55 is another top view of a portion of the elongate
shaft assembly embodiment of FIG. 54 with the articulation system
in a first articulated position or configuration;
[0061] FIG. 56 is another top view of a portion of the elongate
shaft assembly embodiment of FIGS. 54 and 55 with the articulation
system in a second articulated position or configuration;
[0062] FIG. 57 is a partial perspective view of other portions of
the elongated shaft assembly embodiment of FIGS. 53-56 and portions
of the surgical end effector embodiment in an unarticulated
position or configuration and with portions thereof omitted for
clarity;
[0063] FIG. 58 is another partial perspective view of the surgical
end effector embodiment and elongate shaft assembly embodiment of
FIG. 57 with portions thereof omitted for clarity;
[0064] FIG. 59 is a top view of a portion of another elongate shaft
assembly embodiment with portions thereof omitted for clarity;
[0065] FIG. 60 is a top view of portions of another articulation
system embodiment in a neutral or unarticulated position;
[0066] FIG. 61 is a top view of a driver articulation disc
embodiment of the articulation system of FIG. 60;
[0067] FIG. 62 is a top view of a driven articulation disc
embodiment of the articulation system FIG. 60;
[0068] FIG. 63 is another top view of the articulation system
embodiment of FIG. 60 in a position or configuration after an
articulation control motion has been initially applied thereto;
[0069] FIG. 64 is another top view of the articulation system
embodiment of FIG. 63 in a first articulated position or
configuration;
[0070] FIG. 65 is another top view of the articulation system
embodiment of FIGS. 63 and 64 in a second articulated position or
configuration;
[0071] FIG. 66 is a perspective view of another surgical end
effector and closure sleeve embodiment with the jaws thereof in a
closed position or configuration;
[0072] FIG. 67 is another perspective view of the surgical end
effector and closure sleeve embodiment of FIG. 66 with the jaws
thereof in an open position or configuration;
[0073] FIG. 68 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 66 and 67 with the
closure sleeve shown in cross-section and the jaws thereof in an
open position or configuration;
[0074] FIG. 69 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 66-68 shown in
cross-section and with the jaws thereof in an open position or
configuration;
[0075] FIG. 70 is an exploded assembly view of the surgical end
effector and closure sleeve embodiment of FIGS. 66-69;
[0076] FIG. 71 is an exploded assembly view of another surgical end
effector and closure sleeve embodiment;
[0077] FIG. 72 is a perspective view of another surgical end
effector and closure sleeve embodiment with the jaws thereof in an
open position or configuration;
[0078] FIG. 73 is another perspective view of the surgical end
effector and closure sleeve embodiment of FIG. 72 with the jaws
thereof in a closed position or configuration;
[0079] FIG. 74 is an exploded perspective assembly view of the
surgical end effector and closure sleeve embodiment of FIGS. 72 and
73;
[0080] FIG. 75 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 72-74 with the jaws
thereof in a closed position or configuration;
[0081] FIG. 76 is a rear perspective view of the surgical end
effector embodiment of FIGS. 72-75 with the closure sleeve
embodiment thereof shown in phantom lines for clarity;
[0082] FIG. 77 is a side cross-sectional view of the surgical end
effector and closure sleeve embodiment of FIGS. 72-76 with the jaws
thereof in a closed position or configuration;
[0083] FIG. 78 is another side cross-sectional view including one
of the cam plates of the surgical end effector and closure sleeve
embodiment of FIGS. 72-77 with the jaws thereof in a closed
position or configuration;
[0084] FIG. 79 is another side cross-sectional view including one
of the cam plates of the surgical end effector and closure sleeve
embodiment of FIGS. 72-78 with the jaws thereof in an open position
or configuration;
[0085] FIG. 80 is a partial perspective view of another surgical
end effector and closure sleeve embodiment with the jaws thereof in
an open position or configuration;
[0086] FIG. 81 is a partial perspective view of the surgical end
effector and closure sleeve embodiment of FIG. 80 with the jaws
thereof in a closed position or configuration;
[0087] FIG. 82 is an exploded perspective assembly view of the
surgical end effector and closure sleeve embodiment of FIGS. 80 and
81;
[0088] FIG. 83 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 80-82 with the jaws
thereof in a closed position or configuration;
[0089] FIG. 84 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 80-83 with a
portion of the closure sleeve shown in cross-section and with the
jaws thereof in an open position or configuration;
[0090] FIG. 85 is an exploded perspective assembly view of another
surgical end effector and closure sleeve embodiment;
[0091] FIG. 86 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIG. 85 with the jaws
thereof in a closed position or configuration;
[0092] FIG. 87 is a side elevational view of the surgical end
effector and closure sleeve embodiment of FIGS. 85 and 86 with the
jaws thereof in an open position or configuration with a portion of
the closure sleeve shown in cross-section;
[0093] FIG. 88 is a perspective view of a portion of another
elongate shaft assembly embodiment;
[0094] FIG. 89 is another perspective view of the elongate shaft
assembly embodiment of FIG. 88 with some components thereof omitted
for clarity;
[0095] FIG. 90 is another perspective view of the elongate shaft
assembly of FIGS. 88 and 89 with the surgical end effector in an
articulated position or configuration;
[0096] FIG. 91 is an exploded assembly view of the elongate shaft
assembly of FIGS. 88-90;
[0097] FIG. 92 is a top view of the elongate shaft assembly of
FIGS. 88-91 with some components omitted for clarity and the
surgical end effector thereof articulated in one direction;
[0098] FIG. 93 is another top view of the elongate shaft assembly
of FIGS. 88-92 with some components thereof omitted for clarity and
with the surgical end effector articulated in another
direction;
[0099] FIG. 94 is a perspective view of a surgical staple cartridge
embodiment;
[0100] FIG. 95 is a perspective view of another surgical staple
cartridge embodiment;
[0101] FIG. 96 is a perspective view of a portion of another
elongate shaft assembly coupled to a surgical end effector;
[0102] FIG. 97 is another perspective view of the elongate shaft
assembly and surgical end effector of FIG. 96 in an unarticulated
orientation and with portions thereof omitted for clarity;
[0103] FIG. 98 is a top view of the portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIGS.
96 and 97 with the surgical end effector in an articulated
orientation;
[0104] FIG. 99 is another top view of the portions of the surgical
end effector embodiment and elongate shaft assembly embodiment of
FIGS. 96-98 with portions thereof omitted for clarity;
[0105] FIG. 100 is another top view of portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
99 in an articulated orientation;
[0106] FIG. 101 is another top view of portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
100 in an unarticulated orientation;
[0107] FIG. 102 is another top view of portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
101 with the surgical end effector articulated in a first
articulation direction;
[0108] FIG. 103 is another top view of portions of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
102 with the surgical end effector articulated in a second
articulation direction;
[0109] FIG. 104 is a top view of portions of another surgical end
effector embodiment and another elongate shaft assembly embodiment
in an unarticulated orientation;
[0110] FIG. 105 is another top view of the surgical end effector
embodiment and elongate shaft assembly embodiment of FIG. 104 with
the surgical end effector in an articulated orientation;
[0111] FIG. 106 is a top view of a portion of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation with portions thereof omitted for
clarity;
[0112] FIG. 107 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 106 in a first articulated
orientation;
[0113] FIG. 108 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 107 in a second articulated
orientation;
[0114] FIG. 109 is a top view of a portion of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation with portions thereof omitted for
clarity;
[0115] FIG. 110 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 109 in a first articulated
orientation;
[0116] FIG. 111 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 110 in a second articulated
orientation;
[0117] FIG. 112 is a top view of a portion of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation with portions thereof omitted for
clarity;
[0118] FIG. 113 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 112 in a first articulated
orientation;
[0119] FIG. 114 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 113 in a second articulated
orientation;
[0120] FIG. 115 is a top view of a portion of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation with portions thereof omitted for
clarity;
[0121] FIG. 116 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 115 in a first articulated
orientation;
[0122] FIG. 117 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 116 in a second articulated
orientation;
[0123] FIG. 118 is a top view of a portion of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation with portions thereof omitted for
clarity;
[0124] FIG. 119 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 118 in a first articulated
orientation;
[0125] FIG. 120 is a partial perspective view of a portion of
another surgical end effector embodiment and elongate shaft
assembly embodiment in an unarticulated orientation with portions
thereof omitted for clarity;
[0126] FIG. 121 is a top view of the surgical end effector and
elongate shaft assembly of FIG. 120 in an unarticulated
orientation;
[0127] FIG. 122 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 121 in a first articulated
orientation;
[0128] FIG. 123 is a partial perspective view of a portion of
another surgical end effector embodiment and elongate shaft
assembly embodiment in an unarticulated orientation with portions
thereof omitted for clarity;
[0129] FIG. 124 is another perspective view of the surgical end
effector embodiment and elongate shaft assembly embodiment of FIG.
123 in an unarticulated orientation;
[0130] FIG. 125 is an exploded assembly perspective view of the
surgical end effector embodiment and elongate shaft assembly
embodiment of FIGS. 123 and 124;
[0131] FIG. 126 is a top view of the surgical end effector
embodiment and elongate shaft assembly embodiment of FIGS. 123-125
in an unarticulated orientation;
[0132] FIG. 127 is another top view of the surgical end effector
and elongate shaft assembly of FIGS. 123-126 in a first articulated
orientation;
[0133] FIG. 128 is another top view of the surgical end effector
and elongate shaft assembly of FIGS. 123-128 in a second
articulated orientation;
[0134] FIG. 129 is a partial perspective view of a portion of
another surgical end effector embodiment and elongate shaft
assembly embodiment in an unarticulated orientation with portions
thereof omitted for clarity;
[0135] FIG. 130 is a top view of the surgical end effector and
elongate shaft assembly of FIG. 129 in a an unarticulated
orientation;
[0136] FIG. 131 is another top view of the surgical end effector
and elongate shaft assembly of FIGS. 129 and 130 in a first
articulated orientation;
[0137] FIG. 132 is a partial perspective view of portions of a
spine of an elongate shaft assembly and firing beam coupler
embodiment;
[0138] FIG. 132A is a partial cross-sectional view of portions of a
spine of an elongate shaft assembly another firing beam coupler and
lock arrangement;
[0139] FIG. 133 is a top view of the spine and firing beam coupler
embodiment of FIG. 132 with a firing beam embodiment installed
therein;
[0140] FIG. 134 is a top view of a proximal end of a firing beam
embodiment;
[0141] FIG. 135 is a top view of a proximal end of another firing
beam embodiment;
[0142] FIG. 136 is a top view of another surgical end effector
embodiment and elongate shaft assembly embodiment in an
unarticulated orientation and with various components omitted for
clarity;
[0143] FIG. 137 is another top view of the surgical end effector
and elongate shaft assembly of FIG. 136 in a first articulated
orientation;
[0144] FIG. 138 is a partial perspective view of another surgical
end effector and elongate shaft assembly embodiment in an
unarticulated orientation and with components thereof omitted for
clarity;
[0145] FIG. 139 is an exploded perspective assembly view of the
surgical end effector and elongate shaft assembly of FIG. 138;
[0146] FIG. 140 is another exploded perspective view of portions of
the surgical end effector and elongate shaft assembly of FIG.
139;
[0147] FIG. 141 is another perspective view of the surgical end
effector and elongate shaft assembly of FIGS. 138-140 in a first
articulated orientation;
[0148] FIG. 142 is another perspective view of the surgical end
effector and elongate shaft assembly of FIGS. 138-141 in a second
articulated orientation;
[0149] FIG. 143 is a top view of a portion of another elongate
shaft assembly;
[0150] FIG. 144 is a partial exploded assembly view of the elongate
shaft assembly of FIG. 143 and a portion of a surgical end
effector;
[0151] FIG. 145 is a perspective view of another surgical end
effector embodiment and elongate shaft assembly embodiment in an
unarticulated orientation;
[0152] FIG. 146 is a top view of the cable member and pulley
arrangement of the surgical end effector and elongate shaft
assembly of FIG. 145;
[0153] FIG. 147 is an exploded assembly view of portions of the
surgical end effector and elongate shaft assembly of FIG. 145;
[0154] FIG. 148 is a side elevational view of a portion of another
elongate shaft assembly;
[0155] FIG. 149 is an exploded assembly view of the elongate shaft
assembly of FIG. 148;
[0156] FIG. 150 is a top view of portions of another elongate shaft
assembly with components thereof omitted for clarity;
[0157] FIG. 151 is a partial cross-sectional view of a portion of a
cable member of an elongate shaft assembly and a tensioning screw
arrangement for introducing tension into the cable member;
[0158] FIG. 152 is a cross-sectional perspective view of a closure
sleeve embodiment;
[0159] FIG. 153 is a cross-sectional view of another closure sleeve
embodiment;
[0160] FIG. 154 is a cross-sectional view of portions of another
closure sleeve embodiment;
[0161] FIG. 155 is a cross-sectional view of portions of another
closure sleeve embodiment;
[0162] FIG. 156 is a cross-sectional view of portions of another
closure sleeve embodiment;
[0163] FIG. 157 is a cross-sectional perspective view of portions
of another elongate shaft assembly; and
[0164] FIG. 158 is another cross-sectional view of portions of the
elongate shaft assembly of FIG. 157.
[0165] Corresponding reference characters indicate corresponding
parts throughout the several views. The exemplifications set out
herein illustrate various embodiments of the invention, in one
form, and such exemplifications are not to be construed as limiting
the scope of the invention in any manner.
DETAILED DESCRIPTION
[0166] Applicant of the present application owns the following
patent applications that were filed on even date herewith and which
are each herein incorporated by reference in their respective
entireties:
[0167] U.S. patent application Ser. No. ______, entitled
ARTICULATABLE SURGICAL INSTRUMENTS WITH OFF-AXIS FIRING BEAM
ARRANGEMENTS, Attorney Docket No. END7854USNP/150533;
[0168] U.S. patent application Ser. No. ______, entitled
ARTICULATABLE SURGICAL INSTRUMENTS WITH SINGLE ARTICULATION LINK
ARRANGEMENTS, Attorney Docket No. END7852USNP/150531;
[0169] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENTS WITH AN END EFFECTOR THAT IS HIGHLY ARTICULATABLE
RELATIVE TO AN ELONGATE SHAFT ASSEMBLY, Attorney Docket No.
END7850USNP/150529;
[0170] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENT ARTICULATION MECHANISM WITH SLOTTED SECONDARY
CONSTRAINT, Attorney Docket No. END7849USNP/150528;
[0171] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENTS WITH MULTIPLE LINK ARTICULATION ARRANGEMENTS, Attorney
Docket No. END7848USNP/150527;
[0172] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENT WITH ARTICULATING AND AXIALLY TRANSLATABLE END EFFECTOR,
Attorney Docket No. END7847USNP/150526;
[0173] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENTS WITH TENSIONING ARRANGEMENTS FOR CABLE DRIVEN
ARTICULATION SYSTEMS, Attorney Docket No. END7853USNP/150532;
and
[0174] U.S. patent application Ser. No. ______, entitled SURGICAL
INSTRUMENTS WITH CLOSURE STROKE REDUCTION ARRANGEMENTS, Attorney
Docket No. END7855USNP/150534.
[0175] Applicant of the present application owns the following
patent applications that were filed on Jun. 18, 2015 and which are
each herein incorporated by reference in their respective
entireties:
[0176] U.S. patent application Ser. No. 14/742,925, entitled
SURGICAL END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS;
[0177] U.S. patent application Ser. No. 14/742,941, entitled
SURGICAL END EFFECTORS WITH DUAL CAM ACTUATED JAW CLOSING
FEATURES;
[0178] U.S. patent application Ser. No. 14/742,933, entitled
SURGICAL STAPLING INSTRUMENTS WITH LOCKOUT ARRANGEMENTS FOR
PREVENTING FIRING SYSTEM ACTUATION WHEN A CARTRIDGE IS SPENT OR
MISSING;
[0179] U.S. patent application Ser. No. 14/742,914, entitled
MOVABLE FIRING BEAM SUPPORT ARRANGEMENTS FOR ARTICULATABLE SURGICAL
INSTRUMENTS;
[0180] U.S. patent application Ser. No. 14/742,900, entitled
ARTICULATABLE SURGICAL INSTRUMENTS WITH COMPOSITE FIRING BEAM
STRUCTURES WITH CENTER FIRING SUPPORT MEMBER FOR ARTICULATION
SUPPORT; and
[0181] U.S. patent application Ser. No. 14/742,876, entitled
PUSH/PULL ARTICULATION DRIVE SYSTEMS FOR ARTICULATABLE SURGICAL
INSTRUMENTS.
[0182] Applicant of the present application owns the following
patent applications that were filed on Mar. 6, 2015 and which are
each herein incorporated by reference in their respective
entireties:
[0183] U.S. patent application Ser. No. 14/640,746, entitled
POWERED SURGICAL INSTRUMENT;
[0184] U.S. patent application Ser. No. 14/640,795, entitled
MULTIPLE LEVEL THRESHOLDS TO MODIFY OPERATION OF POWERED SURGICAL
INSTRUMENTS;
[0185] U.S. patent application Ser. No. 14/640,832, entitled
ADAPTIVE TISSUE COMPRESSION TECHNIQUES TO ADJUST CLOSURE RATES FOR
MULTIPLE TISSUE TYPES;
[0186] U.S. patent application Ser. No. 14/640,935, entitled
OVERLAID MULTI SENSOR RADIO FREQUENCY (RF) ELECTRODE SYSTEM TO
MEASURE TISSUE COMPRESSION;
[0187] U.S. patent application Ser. No. 14/640,831, entitled
MONITORING SPEED CONTROL AND PRECISION INCREMENTING OF MOTOR FOR
POWERED SURGICAL INSTRUMENTS;
[0188] U.S. patent application Ser. No. 14/640,859, entitled TIME
DEPENDENT EVALUATION OF SENSOR DATA TO DETERMINE STABILITY, CREEP,
AND VISCOELASTIC ELEMENTS OF MEASURES;
[0189] U.S. patent application Ser. No. 14/640,817, entitled
INTERACTIVE FEEDBACK SYSTEM FOR POWERED SURGICAL INSTRUMENTS;
[0190] U.S. patent application Ser. No. 14/640,844, entitled
CONTROL TECHNIQUES AND SUB-PROCESSOR CONTAINED WITHIN MODULAR SHAFT
WITH SELECT CONTROL PROCESSING FROM HANDLE;
[0191] U.S. patent application Ser. No. 14/640,837, entitled SMART
SENSORS WITH LOCAL SIGNAL PROCESSING;
[0192] U.S. patent application Ser. No. 14/640,765, entitled SYSTEM
FOR DETECTING THE MIS-INSERTION OF A STAPLE CARTRIDGE INTO A
SURGICAL STAPLER;
[0193] U.S. patent application Ser. No. 14/640,799, entitled SIGNAL
AND POWER COMMUNICATION SYSTEM POSITIONED ON A ROTATABLE SHAFT;
and
[0194] U.S. patent application Ser. No. 14/640,780, entitled
SURGICAL INSTRUMENT COMPRISING A LOCKABLE BATTERY HOUSING.
[0195] Applicant of the present application owns the following
patent applications that were filed on Feb. 27, 2015, and which are
each herein incorporated by reference in their respective
entireties:
[0196] U.S. patent application Ser. No. 14/633,576, entitled
SURGICAL INSTRUMENT SYSTEM COMPRISING AN INSPECTION STATION;
[0197] U.S. patent application Ser. No. 14/633,546, entitled
SURGICAL APPARATUS CONFIGURED TO ASSESS WHETHER A PERFORMANCE
PARAMETER OF THE SURGICAL APPARATUS IS WITHIN AN ACCEPTABLE
PERFORMANCE BAND;
[0198] U.S. patent application Ser. No. 14/633,576, entitled
SURGICAL CHARGING SYSTEM THAT CHARGES AND/OR CONDITIONS ONE OR MORE
BATTERIES;
[0199] U.S. patent application Ser. No. 14/633,566, entitled
CHARGING SYSTEM THAT ENABLES EMERGENCY RESOLUTIONS FOR CHARGING A
BATTERY;
[0200] U.S. patent application Ser. No. 14/633,555, entitled SYSTEM
FOR MONITORING WHETHER A SURGICAL INSTRUMENT NEEDS TO BE
SERVICED;
[0201] U.S. patent application Ser. No. 14/633,542, entitled
REINFORCED BATTERY FOR A SURGICAL INSTRUMENT;
[0202] U.S. patent application Ser. No. 14/633,548, entitled POWER
ADAPTER FOR A SURGICAL INSTRUMENT;
[0203] U.S. patent application Ser. No. 14/633,526, entitled
ADAPTABLE SURGICAL INSTRUMENT HANDLE;
[0204] U.S. patent application Ser. No. 14/633,541, entitled
MODULAR STAPLING ASSEMBLY; and
[0205] U.S. patent application Ser. No. 14/633,562, entitled
SURGICAL APPARATUS CONFIGURED TO TRACK AN END-OF-LIFE
PARAMETER.
[0206] Applicant of the present application owns the following
patent applications that were filed on Dec. 18, 2014 and which are
each herein incorporated by reference in their respective
entireties:
[0207] U.S. patent application Ser. No. 14/574,478, entitled
SURGICAL INSTRUMENT SYSTEMS COMPRISING AN ARTICULATABLE END
EFFECTOR AND MEANS FOR ADJUSTING THE FIRING STROKE OF A FIRING;
[0208] U.S. patent application Ser. No. 14/574,483, entitled
SURGICAL INSTRUMENT ASSEMBLY COMPRISING LOCKABLE SYSTEMS;
[0209] U.S. patent application Ser. No. 14/575,139, entitled DRIVE
ARRANGEMENTS FOR ARTICULATABLE SURGICAL INSTRUMENTS;
[0210] U.S. patent application Ser. No. 14/575,148, entitled
LOCKING ARRANGEMENTS FOR DETACHABLE SHAFT ASSEMBLIES WITH
ARTICULATABLE SURGICAL END EFFECTORS;
[0211] U.S. patent application Ser. No. 14/575,130, entitled
SURGICAL INSTRUMENT WITH AN ANVIL THAT IS SELECTIVELY MOVABLE ABOUT
A DISCRETE NON-MOVABLE AXIS RELATIVE TO A STAPLE CARTRIDGE;
[0212] U.S. patent application Ser. No. 14/575,143, entitled
SURGICAL INSTRUMENTS WITH IMPROVED CLOSURE ARRANGEMENTS;
[0213] U.S. patent application Ser. No. 14/575,117, entitled
SURGICAL INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND MOVABLE
FIRING BEAM SUPPORT ARRANGEMENTS;
[0214] U.S. patent application Ser. No. 14/575,154, entitled
SURGICAL INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND IMPROVED
FIRING BEAM SUPPORT ARRANGEMENTS;
[0215] U.S. patent application Ser. No. 14/574,493, entitled
SURGICAL INSTRUMENT ASSEMBLY COMPRISING A FLEXIBLE ARTICULATION
SYSTEM; and
[0216] U.S. patent application Ser. No. 14/574,500, entitled
SURGICAL INSTRUMENT ASSEMBLY COMPRISING A LOCKABLE ARTICULATION
SYSTEM.
[0217] Applicant of the present application owns the following
patent applications that were filed on Mar. 1, 2013 and which are
each herein incorporated by reference in their respective
entireties:
[0218] U.S. patent application Ser. No. 13/782,295, entitled
ARTICULATABLE SURGICAL INSTRUMENTS WITH CONDUCTIVE PATHWAYS FOR
SIGNAL COMMUNICATION, now U.S. Patent Application Publication No.
2014/0246471;
[0219] U.S. patent application Ser. No. 13/782,323, entitled ROTARY
POWERED ARTICULATION JOINTS FOR SURGICAL INSTRUMENTS, now U.S.
Patent Application Publication No. 2014/0246472;
[0220] U.S. patent application Ser. No. 13/782,338, entitled
THUMBWHEEL SWITCH ARRANGEMENTS FOR SURGICAL INSTRUMENTS, now U.S.
Patent Application Publication No. 2014/0249557;
[0221] U.S. patent application Ser. No. 13/782,499, entitled
ELECTROMECHANICAL SURGICAL DEVICE WITH SIGNAL RELAY ARRANGEMENT,
now U.S. Patent Application Publication No. 2014/0246474;
[0222] U.S. patent application Ser. No. 13/782,460, entitled
MULTIPLE PROCESSOR MOTOR CONTROL FOR MODULAR SURGICAL INSTRUMENTS,
now U.S. Patent Application Publication No. 2014/0246478;
[0223] U.S. patent application Ser. No. 13/782,358, entitled
JOYSTICK SWITCH ASSEMBLIES FOR SURGICAL INSTRUMENTS, now U.S.
Patent Application Publication No. 2014/0246477;
[0224] U.S. patent application Ser. No. 13/782,481, entitled SENSOR
STRAIGHTENED END EFFECTOR DURING REMOVAL THROUGH TROCAR, now U.S.
Patent Application Publication No. 2014/0246479;
[0225] U.S. patent application Ser. No. 13/782,518, entitled
CONTROL METHODS FOR SURGICAL INSTRUMENTS WITH REMOVABLE IMPLEMENT
PORTIONS, now U.S. Patent Application Publication No.
2014/0246475;
[0226] U.S. patent application Ser. No. 13/782,375, entitled ROTARY
POWERED SURGICAL INSTRUMENTS WITH MULTIPLE DEGREES OF FREEDOM, now
U.S. Patent Application Publication No. 2014/0246473; and
[0227] U.S. patent application Ser. No. 13/782,536, entitled
SURGICAL INSTRUMENT SOFT STOP, now U.S. Patent Application
Publication No. 2014/0246476.
[0228] Applicant of the present application also owns the following
patent applications that were filed on Mar. 14, 2013 and which are
each herein incorporated by reference in their respective
entireties:
[0229] U.S. patent application Ser. No. 13/803,097, entitled
ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FIRING DRIVE, now
U.S. Patent Application Publication No. 2014/0263542;
[0230] U.S. patent application Ser. No. 13/803,193, entitled
CONTROL ARRANGEMENTS FOR A DRIVE MEMBER OF A SURGICAL INSTRUMENT,
now U.S. Patent Application Publication No. 2014/0263537;
[0231] U.S. patent application Ser. No. 13/803,053, entitled
INTERCHANGEABLE SHAFT ASSEMBLIES FOR USE WITH A SURGICAL
INSTRUMENT, now U.S. Patent Application Publication No.
2014/0263564;
[0232] U.S. patent application Ser. No. 13/803,086, entitled
ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN ARTICULATION LOCK,
now U.S. Patent Application Publication No. 2014/0263541;
[0233] U.S. patent application Ser. No. 13/803,210, entitled SENSOR
ARRANGEMENTS FOR ABSOLUTE POSITIONING SYSTEM FOR SURGICAL
INSTRUMENTS, now U.S. Patent Application Publication No.
2014/0263538;
[0234] U.S. patent application Ser. No. 13/803,148, entitled
MULTI-FUNCTION MOTOR FOR A SURGICAL INSTRUMENT, now U.S. Patent
Application Publication No. 2014/0263554;
[0235] U.S. patent application Ser. No. 13/803,066, entitled DRIVE
SYSTEM LOCKOUT ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS, now
U.S. Patent Application Publication No. 2014/0263565;
[0236] U.S. patent application Ser. No. 13/803,117, entitled
ARTICULATION CONTROL SYSTEM FOR ARTICULATABLE SURGICAL INSTRUMENTS,
now U.S. Patent Application Publication No. 2014/0263553;
[0237] U.S. patent application Ser. No. 13/803,130, entitled DRIVE
TRAIN CONTROL ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS, now
U.S. Patent Application Publication No. 2014/0263543; and
[0238] U.S. patent application Ser. No. 13/803,159, entitled METHOD
AND SYSTEM FOR OPERATING A SURGICAL INSTRUMENT, now U.S. Patent
Application Publication No. 2014/0277017.
[0239] Applicant of the present application also owns the following
patent application that was filed on Mar. 7, 2014 and is herein
incorporated by reference in its entirety:
[0240] U.S. patent application Ser. No. 14/200,111, entitled
CONTROL SYSTEMS FOR SURGICAL INSTRUMENTS, now U.S. Patent
Application Publication No. 2014/0263539.
[0241] Applicant of the present application also owns the following
patent applications that were filed on Mar. 26, 2014 and are each
herein incorporated by reference in their respective
entireties:
[0242] U.S. patent application Ser. No. 14/226,106, entitled POWER
MANAGEMENT CONTROL SYSTEMS FOR SURGICAL INSTRUMENTS, now U.S.
Patent Application Publication No. 2015/0272582;
[0243] U.S. patent application Ser. No. 14/226,099, entitled
STERILIZATION VERIFICATION CIRCUIT, now U.S. Patent Application
Publication No. 2015/0272581;
[0244] U.S. patent application Ser. No. 14/226,094, entitled
VERIFICATION OF NUMBER OF BATTERY EXCHANGES/PROCEDURE COUNT, now
U.S. Patent Application Publication No. 2015/0272580;
[0245] U.S. patent application Ser. No. 14/226,117, entitled POWER
MANAGEMENT THROUGH SLEEP OPTIONS OF SEGMENTED CIRCUIT AND WAKE UP
CONTROL, now U.S. Patent Application Publication No.
2015/0272574;
[0246] U.S. patent application Ser. No. 14/226,075, entitled
MODULAR POWERED SURGICAL INSTRUMENT WITH DETACHABLE SHAFT
ASSEMBLIES, now U.S. Patent Application Publication No.
2015/0272579;
[0247] U.S. patent application Ser. No. 14/226,093, entitled
FEEDBACK ALGORITHMS FOR MANUAL BAILOUT SYSTEMS FOR SURGICAL
INSTRUMENTS, now U.S. Patent Application Publication No.
2015/0272569;
[0248] U.S. patent application Ser. No. 14/226,116, entitled
SURGICAL INSTRUMENT UTILIZING SENSOR ADAPTATION, now U.S. Patent
Application Publication No. 2015/0272571;
[0249] U.S. patent application Ser. No. 14/226,071, entitled
SURGICAL INSTRUMENT CONTROL CIRCUIT HAVING A SAFETY PROCESSOR, now
U.S. Patent Application Publication No. 2015/0272578;
[0250] U.S. patent application Ser. No. 14/226,097, entitled
SURGICAL INSTRUMENT COMPRISING INTERACTIVE SYSTEMS, now U.S. Patent
Application Publication No. 2015/0272570;
[0251] U.S. patent application Ser. No. 14/226,126, entitled
INTERFACE SYSTEMS FOR USE WITH SURGICAL INSTRUMENTS, now U.S.
Patent Application Publication No. 2015/0272572;
[0252] U.S. patent application Ser. No. 14/226,133, entitled
MODULAR SURGICAL INSTRUMENT SYSTEM, now U.S. Patent Application
Publication No. 2015/0272557;
[0253] U.S. patent application Ser. No. 14/226,081, entitled
SYSTEMS AND METHODS FOR CONTROLLING A SEGMENTED CIRCUIT, now U.S.
Patent Application Publication No. 2015/0277471;
[0254] U.S. patent application Ser. No. 14/226,076, entitled POWER
MANAGEMENT THROUGH SEGMENTED CIRCUIT AND VARIABLE VOLTAGE
PROTECTION, now U.S. Patent Application Publication No.
2015/0280424;
[0255] U.S. patent application Ser. No. 14/226,111, entitled
SURGICAL STAPLING INSTRUMENT SYSTEM, now U.S. Patent Application
Publication No. 2015/0272583; and
[0256] U.S. patent application Ser. No. 14/226,125, entitled
SURGICAL INSTRUMENT COMPRISING A ROTATABLE SHAFT, now U.S. Patent
Application Publication No. 2015/0280384.
[0257] Applicant of the present application also owns the following
patent applications that were filed on Sep. 5, 2014 and which are
each herein incorporated by reference in their respective
entireties:
[0258] U.S. patent application Ser. No. 14/479,103, entitled
CIRCUITRY AND SENSORS FOR POWERED MEDICAL DEVICE;
[0259] U.S. patent application Ser. No. 14/479,119, entitled
ADJUNCT WITH INTEGRATED SENSORS TO QUANTIFY TISSUE COMPRESSION;
[0260] U.S. patent application Ser. No. 14/478,908, entitled
MONITORING DEVICE DEGRADATION BASED ON COMPONENT EVALUATION;
[0261] U.S. patent application Ser. No. 14/478,895, entitled
MULTIPLE SENSORS WITH ONE SENSOR AFFECTING A SECOND SENSOR'S OUTPUT
OR INTERPRETATION;
[0262] U.S. patent application Ser. No. 14/479,110, entitled USE OF
POLARITY OF HALL MAGNET DETECTION TO DETECT MISLOADED
CARTRIDGE;
[0263] U.S. patent application Ser. No. 14/479,098, entitled SMART
CARTRIDGE WAKE UP OPERATION AND DATA RETENTION;
[0264] U.S. patent application Ser. No. 14/479,115, entitled
MULTIPLE MOTOR CONTROL FOR POWERED MEDICAL DEVICE; and
[0265] U.S. patent application Ser. No. 14/479,108, entitled LOCAL
DISPLAY OF TISSUE PARAMETER STABILIZATION.
[0266] Applicant of the present application also owns the following
patent applications that were filed on Apr. 9, 2014 and which are
each herein incorporated by reference in their respective
entireties:
[0267] U.S. patent application Ser. No. 14/248,590, entitled MOTOR
DRIVEN SURGICAL INSTRUMENTS WITH LOCKABLE DUAL DRIVE SHAFTS, now
U.S. Patent Application Publication No. 2014/0305987;
[0268] U.S. patent application Ser. No. 14/248,581, entitled
SURGICAL INSTRUMENT COMPRISING A CLOSING DRIVE AND A FIRING DRIVE
OPERATED FROM THE SAME ROTATABLE OUTPUT, now U.S. Patent
Application Publication No. 2014/0305989;
[0269] U.S. patent application Ser. No. 14/248,595, entitled
SURGICAL INSTRUMENT SHAFT INCLUDING SWITCHES FOR CONTROLLING THE
OPERATION OF THE SURGICAL INSTRUMENT, now U.S. Patent Application
Publication No. 2014/0305988;
[0270] U.S. patent application Ser. No. 14/248,588, entitled
POWERED LINEAR SURGICAL STAPLER, now U.S. Patent Application
Publication No. 2014/0309666;
[0271] U.S. patent application Ser. No. 14/248,591, entitled
TRANSMISSION ARRANGEMENT FOR A SURGICAL INSTRUMENT, now U.S. Patent
Application Publication No. 2014/0305991;
[0272] U.S. patent application Ser. No. 14/248,584, entitled
MODULAR MOTOR DRIVEN SURGICAL INSTRUMENTS WITH ALIGNMENT FEATURES
FOR ALIGNING ROTARY DRIVE SHAFTS WITH SURGICAL END EFFECTOR SHAFTS,
now U.S. Patent Application Publication No. 2014/0305994;
[0273] U.S. patent application Ser. No. 14/248,587, entitled
POWERED SURGICAL STAPLER, now U.S. Patent Application Publication
No. 2014/0309665;
[0274] U.S. patent application Ser. No. 14/248,586, entitled DRIVE
SYSTEM DECOUPLING ARRANGEMENT FOR A SURGICAL INSTRUMENT, now U.S.
Patent Application Publication No. 2014/0305990; and
[0275] U.S. patent application Ser. No. 14/248,607, entitled
MODULAR MOTOR DRIVEN SURGICAL INSTRUMENTS WITH STATUS INDICATION
ARRANGEMENTS, now U.S. Patent Application Publication No.
2014/0305992.
[0276] Applicant of the present application also owns the following
patent applications that were filed on Apr. 16, 2013 and which are
each herein incorporated by reference in their respective
entireties:
[0277] U.S. Provisional Patent Application Ser. No. 61/812,365,
entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A
SINGLE MOTOR;
[0278] U.S. Provisional Patent Application Ser. No. 61/812,376,
entitled LINEAR CUTTER WITH POWER;
[0279] U.S. Provisional Patent Application Ser. No. 61/812,382,
entitled LINEAR CUTTER WITH MOTOR AND PISTOL GRIP;
[0280] U.S. Provisional Patent Application Ser. No. 61/812,385,
entitled SURGICAL INSTRUMENT HANDLE WITH MULTIPLE ACTUATION MOTORS
AND MOTOR CONTROL; and
[0281] U.S. Provisional Patent Application Ser. No. 61/812,372,
entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A
SINGLE MOTOR.
[0282] Numerous specific details are set forth to provide a
thorough understanding of the overall structure, function,
manufacture, and use of the embodiments as described in the
specification and illustrated in the accompanying drawings.
Well-known operations, components, and elements have not been
described in detail so as not to obscure the embodiments described
in the specification. The reader will understand that the
embodiments described and illustrated herein are non-limiting
examples, and thus it can be appreciated that the specific
structural and functional details disclosed herein may be
representative and illustrative. Variations and changes thereto may
be made without departing from the scope of the claims.
[0283] The terms "comprise" (and any form of comprise, such as
"comprises" and "comprising"), "have" (and any form of have, such
as "has" and "having"), "include" (and any form of include, such as
"includes" and "including") and "contain" (and any form of contain,
such as "contains" and "containing") are open-ended linking verbs.
As a result, a surgical system, device, or apparatus that
"comprises," "has," "includes" or "contains" one or more elements
possesses those one or more elements, but is not limited to
possessing only those one or more elements. Likewise, an element of
a system, device, or apparatus that "comprises," "has," "includes"
or "contains" one or more features possesses those one or more
features, but is not limited to possessing only those one or more
features.
[0284] The terms "proximal" and "distal" are used herein with
reference to a clinician manipulating the handle portion of the
surgical instrument. The term "proximal" refers to the portion
closest to the clinician and the term "distal" refers to the
portion located away from the clinician. It will be further
appreciated that, for convenience and clarity, spatial terms such
as "vertical", "horizontal", "up", and "down" may be used herein
with respect to the drawings. However, surgical instruments are
used in many orientations and positions, and these terms are not
intended to be limiting and/or absolute.
[0285] Various exemplary devices and methods are provided for
performing laparoscopic and minimally invasive surgical procedures.
However, the reader will readily appreciate that the various
methods and devices disclosed herein can be used in numerous
surgical procedures and applications including, for example, in
connection with open surgical procedures. As the present Detailed
Description proceeds, the reader will further appreciate that the
various instruments disclosed herein can be inserted into a body in
any way, such as through a natural orifice, through an incision or
puncture hole formed in tissue, etc. The working portions or end
effector portions of the instruments can be inserted directly into
a patient's body or can be inserted through an access device that
has a working channel through which the end effector and elongate
shaft of a surgical instrument can be advanced.
[0286] A surgical stapling system can comprise a shaft and an end
effector extending from the shaft. The end effector comprises a
first jaw and a second jaw. The first jaw comprises a staple
cartridge. The staple cartridge is insertable into and removable
from the first jaw; however, other embodiments are envisioned in
which a staple cartridge is not removable from, or at least readily
replaceable from, the first jaw. The second jaw comprises an anvil
configured to deform staples ejected from the staple cartridge. The
second jaw is pivotable relative to the first jaw about a closure
axis; however, other embodiments are envisioned in which first jaw
is pivotable relative to the second jaw. The surgical stapling
system further comprises an articulation joint configured to permit
the end effector to be rotated, or articulated, relative to the
shaft. The end effector is rotatable about an articulation axis
extending through the articulation joint. Other embodiments are
envisioned which do not include an articulation joint.
[0287] The staple cartridge comprises a cartridge body. The
cartridge body includes a proximal end, a distal end, and a deck
extending between the proximal end and the distal end. In use, the
staple cartridge is positioned on a first side of the tissue to be
stapled and the anvil is positioned on a second side of the tissue.
The anvil is moved toward the staple cartridge to compress and
clamp the tissue against the deck. Thereafter, staples removably
stored in the cartridge body can be deployed into the tissue. The
cartridge body includes staple cavities defined therein wherein
staples are removably stored in the staple cavities. The staple
cavities are arranged in six longitudinal rows. Three rows of
staple cavities are positioned on a first side of a longitudinal
slot and three rows of staple cavities are positioned on a second
side of the longitudinal slot. Other arrangements of staple
cavities and staples may be possible.
[0288] The staples are supported by staple drivers in the cartridge
body. The drivers are movable between a first, or unfired position,
and a second, or fired, position to eject the staples from the
staple cavities. The drivers are retained in the cartridge body by
a retainer which extends around the bottom of the cartridge body
and includes resilient members configured to grip the cartridge
body and hold the retainer to the cartridge body. The drivers are
movable between their unfired positions and their fired positions
by a sled. The sled is movable between a proximal position adjacent
the proximal end and a distal position adjacent the distal end. The
sled comprises a plurality of ramped surfaces configured to slide
under the drivers and lift the drivers, and the staples supported
thereon, toward the anvil.
[0289] Further to the above, the sled is moved distally by a firing
member. The firing member is configured to contact the sled and
push the sled toward the distal end. The longitudinal slot defined
in the cartridge body is configured to receive the firing member.
The anvil also includes a slot configured to receive the firing
member. The firing member further comprises a first cam which
engages the first jaw and a second cam which engages the second
jaw. As the firing member is advanced distally, the first cam and
the second cam can control the distance, or tissue gap, between the
deck of the staple cartridge and the anvil. The firing member also
comprises a knife configured to incise the tissue captured
intermediate the staple cartridge and the anvil. It is desirable
for the knife to be positioned at least partially proximal to the
ramped surfaces such that the staples are ejected ahead of the
knife.
[0290] FIGS. 1-4 depict a motor-driven surgical cutting and
fastening instrument 10 that may or may not be reused. In the
illustrated embodiment, the instrument 10 includes a housing 12
that comprises a handle 14 that is configured to be grasped,
manipulated and actuated by the clinician. The housing 12 is
configured for operable attachment to an elongate shaft assembly
200 that has a surgical end effector 300 operably coupled thereto
that is configured to perform one or more surgical tasks or
procedures. The elongate shaft assembly 200 may be interchangeable
with other shaft assemblies in the various manners disclosed, for
example, in U.S. patent application Ser. No. 14/226,075, entitled
MODULAR POWERED SURGICAL INSTRUMENT WITH DETACHABLE SHAFT
ASSEMBLIES, now U.S. Patent Application Publication No.
2015/0272579, the entire disclosure of which is hereby incorporated
by reference herein. In other arrangements, the elongate shaft
assembly may not be interchangeable with other shaft assemblies and
essentially comprise a dedicated non-removable portion of the
instrument.
[0291] As the present Detailed Description proceeds, it will be
understood that the various forms of interchangeable shaft
assemblies disclosed herein may also be effectively employed in
connection with robotically-controlled surgical systems. Thus, the
term "housing" may also encompass a housing or similar portion of a
robotic system that houses or otherwise operably supports at least
one drive system that is configured to generate and apply at least
one control motion which could be used to actuate the elongate
shaft assemblies disclosed herein and their respective equivalents.
The term "frame" may refer to a portion of a handheld surgical
instrument. The term "frame" may also represent a portion of a
robotically controlled surgical instrument and/or a portion of the
robotic system that may be used to operably control a surgical
instrument. For example, the shaft assemblies disclosed herein may
be employed with various robotic systems, instruments, components
and methods disclosed in U.S. patent application Ser. No.
13/118,241, entitled SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE
STAPLE DEPLOYMENT ARRANGEMENTS, now U.S. Pat. No. 9,072,535, which
is hereby incorporated by reference herein in its entirety.
[0292] The housing 12 depicted in FIG. 1 is shown in connection
with the elongate shaft assembly 200 that includes a surgical end
effector 300 that comprises a surgical cutting and fastening device
that is configured to operably support a surgical staple cartridge
304 therein. The housing 12 may be configured for use in connection
with shaft assemblies that include end effectors that are adapted
to support different sizes and types of staple cartridges, have
different shaft lengths, sizes, and types, etc. In addition, the
housing 12 may also be effectively employed with a variety of other
shaft assemblies including those assemblies that are configured to
apply other motions and forms of energy such as, for example, radio
frequency (RF) energy, ultrasonic energy and/or motion to end
effector arrangements adapted for use in connection with various
surgical applications and procedures. Furthermore, the end
effectors, shaft assemblies, handles, surgical instruments, and/or
surgical instrument systems can utilize any suitable fastener, or
fasteners, to fasten tissue. For instance, a fastener cartridge
comprising a plurality of fasteners removably stored therein can be
removably inserted into and/or attached to the end effector of a
shaft assembly.
[0293] FIG. 1 illustrates the housing 12 or handle 14 of the
surgical instrument 10 with an interchangeable elongate shaft
assembly 200 operably coupled thereto. As can be seen in FIG. 1,
the handle 14 may comprise a pair of interconnectable handle
housing segments 16 and 18 that may be interconnected by screws,
snap features, adhesive, etc. In the illustrated arrangement, the
handle housing segments 16, 18 cooperate to form a pistol grip
portion 19 that can be gripped and manipulated by the clinician. As
will be discussed in further detail below, the handle 14 operably
supports a plurality of drive systems therein that are configured
to generate and apply various control motions to corresponding
portions of the interchangeable shaft assembly that is operably
attached thereto.
[0294] Referring now to FIG. 2, the handle 14 may further include a
frame 20 that operably supports a plurality of drive systems. For
example, the frame 20 can operably support a "first" or closure
drive system, generally designated as 30, which may be employed to
apply closing and opening motions to the elongate shaft assembly
200 that is operably attached or coupled thereto. In at least one
form, the closure drive system 30 may include an actuator in the
form of a closure trigger 32 that is pivotally supported by the
frame 20. More specifically, as illustrated in FIG. 2, the closure
trigger 32 is pivotally coupled to the housing 14 by a pin 33. Such
arrangement enables the closure trigger 32 to be manipulated by a
clinician such that when the clinician grips the pistol grip
portion 19 of the handle 14, the closure trigger 32 may be easily
pivoted from a starting or "unactuated" position to an "actuated"
position and more particularly to a fully compressed or fully
actuated position. The closure trigger 32 may be biased into the
unactuated position by spring or other biasing arrangement (not
shown). In various forms, the closure drive system 30 further
includes a closure linkage assembly 34 that is pivotally coupled to
the closure trigger 32. As can be seen in FIG. 2, the closure
linkage assembly 34 may include a first closure link 36 and a
second closure link 38 that are pivotally coupled to the closure
trigger 32 by a pin 35. The second closure link 38 may also be
referred to herein as an "attachment member" and include a
transverse attachment pin 37.
[0295] Still referring to FIG. 2, it can be observed that the first
closure link 36 may have a locking wall or end 39 thereon that is
configured to cooperate with a closure release assembly 60 that is
pivotally coupled to the frame 20. In at least one form, the
closure release assembly 60 may comprise a release button assembly
62 that has a distally protruding locking pawl 64 formed thereon.
The release button assembly 62 may be pivoted in a counterclockwise
direction by a release spring (not shown). As the clinician
depresses the closure trigger 32 from its unactuated position
towards the pistol grip portion 19 of the handle 14, the first
closure link 36 pivots upward to a point wherein the locking pawl
64 drops into retaining engagement with the locking wall 39 on the
first closure link 36 thereby preventing the closure trigger 32
from returning to the unactuated position. Thus, the closure
release assembly 60 serves to lock the closure trigger 32 in the
fully actuated position. When the clinician desires to unlock the
closure trigger 32 to permit it to be biased to the unactuated
position, the clinician simply pivots the closure release button
assembly 62 such that the locking pawl 64 is moved out of
engagement with the locking wall 39 on the first closure link 36.
When the locking pawl 64 has been moved out of engagement with the
first closure link 36, the closure trigger 32 may pivot back to the
unactuated position. Other closure trigger locking and release
arrangements may also be employed.
[0296] When the closure trigger 32 is moved from its unactuated
position to its actuated position, the closure release button 62 is
pivoted between a first position and a second position. The
rotation of the closure release button 62 can be referred to as
being an upward rotation; however, at least a portion of the
closure release button 62 is being rotated toward the circuit board
100. Still referring to FIG. 2, the closure release button 62 can
include an arm 61 extending therefrom and a magnetic element 63,
such as a permanent magnet, for example, mounted to the arm 61.
When the closure release button 62 is rotated from its first
position to its second position, the magnetic element 63 can move
toward the circuit board 100. The circuit board 100 can include at
least one sensor that is configured to detect the movement of the
magnetic element 63. In at least one embodiment, a "Hall effect"
sensor can be mounted to the bottom surface of the circuit board
100. The Hall effect sensor can be configured to detect changes in
a magnetic field surrounding the Hall effect sensor that are caused
by the movement of the magnetic element 63. The Hall effect sensor
can be in signal communication with a microcontroller, for example,
which can determine whether the closure release button 62 is in its
first position, which is associated with the unactuated position of
the closure trigger 32 and the open configuration of the end
effector, its second position, which is associated with the
actuated position of the closure trigger 32 and the closed
configuration of the end effector, and/or any position between the
first position and the second position.
[0297] Also in the illustrated arrangement, the handle 14 and the
frame 20 operably support another drive system referred to herein
as a firing drive system 80 that is configured to apply firing
motions to corresponding portions of the interchangeable shaft
assembly attached thereto. The firing drive system may 80 also be
referred to herein as a "second drive system". The firing drive
system 80 may employ an electric motor 82, located in the pistol
grip portion 19 of the handle 14. In various forms, the motor 82
may be a DC brushed driving motor having a maximum rotation of,
approximately, 25,000 RPM, for example. In other arrangements, the
motor may include a brushless motor, a cordless motor, a
synchronous motor, a stepper motor, or any other suitable electric
motor. The motor 82 may be powered by a power source 90 that in one
form may comprise a removable power pack 92. As can be seen in FIG.
2, for example, the power pack 92 may comprise a proximal housing
portion 94 that is configured for attachment to a distal housing
portion 96. The proximal housing portion 94 and the distal housing
portion 96 are configured to operably support a plurality of
batteries 98 therein. Batteries 98 may each comprise, for example,
a Lithium Ion ("LI") or other suitable battery. The distal housing
portion 96 is configured for removable operable attachment to a
control circuit board assembly 100 which is also operably coupled
to the motor 82. A number of batteries 98 may be connected in
series may be used as the power source for the surgical instrument
10. In addition, the power source 90 may be replaceable and/or
rechargeable.
[0298] As outlined above with respect to other various forms, the
electric motor 82 includes a rotatable shaft (not shown) that
operably interfaces with a gear reducer assembly 84 that is mounted
in meshing engagement with a with a set, or rack, of drive teeth
122 on a longitudinally-movable drive member 120. In use, a voltage
polarity provided by the power source 90 can operate the electric
motor 82 in a clockwise direction wherein the voltage polarity
applied to the electric motor by the battery can be reversed in
order to operate the electric motor 82 in a counter-clockwise
direction. When the electric motor 82 is rotated in one direction,
the drive member 120 will be axially driven in the distal direction
DD. When the motor 82 is driven in the opposite rotary direction,
the drive member 120 will be axially driven in a proximal direction
PD. The handle 14 can include a switch which can be configured to
reverse the polarity applied to the electric motor 82 by the power
source 90. As with the other forms described herein, the handle 14
can also include a sensor that is configured to detect the position
of the drive member 120 and/or the direction in which the drive
member 120 is being moved.
[0299] Actuation of the motor 82 is controlled by a firing trigger
130 that is pivotally supported on the handle 14. The firing
trigger 130 may be pivoted between an unactuated position and an
actuated position. The firing trigger 130 may be biased into the
unactuated position by a spring 132 or other biasing arrangement
such that when the clinician releases the firing trigger 130, it
may be pivoted or otherwise returned to the unactuated position by
the spring 132 or biasing arrangement. In at least one form, the
firing trigger 130 can be positioned "outboard" of the closure
trigger 32 as was discussed above. In at least one form, a firing
trigger safety button 134 may be pivotally mounted to the closure
trigger 32 by pin 35. The safety button 134 may be positioned
between the firing trigger 130 and the closure trigger 32 and have
a pivot arm 136 protruding therefrom. See FIG. 2. When the closure
trigger 32 is in the unactuated position, the safety button 134 is
contained in the handle 14 where the clinician cannot readily
access it and move it between a safety position preventing
actuation of the firing trigger 130 and a firing position wherein
the firing trigger 130 may be fired. As the clinician depresses the
closure trigger 32, the safety button 134 and the firing trigger
130 pivot down wherein they can then be manipulated by the
clinician.
[0300] As discussed above, the handle 14 includes a closure trigger
32 and a firing trigger 130. The firing trigger 130 can be
pivotably mounted to the closure trigger 32. When the closure
trigger 32 is moved from its unactuated position to its actuated
position, the firing trigger 130 can descend downwardly, as
outlined above. After the safety button 134 has been moved to its
firing position, the firing trigger 130 can be depressed to operate
the motor of the surgical instrument firing system. In various
instances, the handle 14 can include a tracking system configured
to determine the position of the closure trigger 32 and/or the
position of the firing trigger 130.
[0301] As indicated above, in at least one form, the longitudinally
movable drive member 120 has a rack of drive teeth 122 formed
thereon for meshing engagement with a corresponding drive gear 86
of the gear reducer assembly 84. At least one form also includes a
manually-actuatable "bailout" assembly 140 that is configured to
enable the clinician to manually retract the longitudinally movable
drive member 120 should the motor 82 become disabled. The bailout
assembly 140 may include a lever or bailout handle assembly 142
that is configured to be manually pivoted into ratcheting
engagement with teeth 124 also provided in the drive member 120.
Thus, the clinician can manually retract the drive member 120 by
using the bailout handle assembly 142 to ratchet the drive member
120 in the proximal direction PD. U.S. Patent Application
Publication No. 2010/0089970, now U.S. Pat. No. 8,608,045,
discloses bailout arrangements and other components, arrangements
and systems that may also be employed with the various instruments
disclosed herein. U.S. patent application Ser. No. 12/249,117,
entitled POWERED SURGICAL CUTTING AND STAPLING APPARATUS WITH
MANUALLY RETRACTABLE FIRING SYSTEM, now U.S. Pat. No. 8,608,045, is
hereby incorporated by reference in its entirety.
[0302] Turning now to FIGS. 1 and 3, the elongate shaft assembly
200 includes a surgical end effector 300 that comprises an elongate
channel 302 that is configured to operably support a staple
cartridge 304 therein. The end effector 300 may further include an
anvil 310 that is pivotally supported relative to the elongate
channel 302. As will be discussed in further detail below, the
surgical end effector 300 may be articulated relative to the
elongate shaft assembly about an articulation joint 270. As can be
seen in FIGS. 3 and 4, the shaft assembly 200 can further include a
proximal housing or nozzle 201 comprised of nozzle portions 202 and
203. The shaft assembly 200 further includes a closure sleeve 260
which can be utilized to close and/or open an anvil 310 of the end
effector 300. As can be seen in FIG. 4, the shaft assembly 200
includes a spine 210 which can be configured to fixably support a
shaft frame portion 212 of an articulation lock 350. Details
regarding the construction and operation of the articulation lock
350 are set forth in U.S. patent application Ser. No. 13/803,086,
entitled ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN
ARTICULATION LOCK, now U.S. Patent Application Publication No.
2014/0263541, the disclosure of which is hereby incorporated by
reference herein in its entirety. The spine 210 is configured to,
one, slidably support a firing member 220 therein and, two,
slidably support the closure sleeve 260 which extends around the
spine 210. The spine 210 also slidably supports a proximal
articulation driver 230. The proximal articulation driver 230 has a
distal end 231 that is configured to operably engage the
articulation lock 350. In one arrangement, the articulation lock
350 interfaces with an articulation frame 352 that is adapted to
operably engage a drive pin (not shown) on the end effector frame
(not shown).
[0303] In the illustrated arrangement, the spine 210 comprises a
proximal end 211 which is rotatably supported in a chassis 240. In
one arrangement, for example, the proximal end 211 of the spine 210
has a thread 214 formed thereon for threaded attachment to a spine
bearing 216 configured to be supported within the chassis 240. See
FIG. 3. Such arrangement facilitates rotatable attachment of the
spine 210 to the chassis 240 such that the spine 210 may be
selectively rotated about a shaft axis SA-SA relative to the
chassis 240. The shaft assembly 200 also includes a closure shuttle
250 that is slidably supported within the chassis 240 such that it
may be axially moved relative thereto. As can be seen in FIG. 3,
the closure shuttle 250 includes a pair of proximally-protruding
hooks 252 that are configured for attachment to the attachment pin
37 that is attached to the second closure link 38 as will be
discussed in further detail below. See FIG. 2. A proximal end 261
of the closure sleeve 260 is coupled to the closure shuttle 250 for
relative rotation thereto. For example, a U-shaped connector 263 is
inserted into an annular slot 262 in the proximal end 261 of the
closure sleeve 260 and is retained within vertical slots 253 in the
closure shuttle 250. See FIG. 3. Such arrangement serves to attach
the closure sleeve 260 to the closure shuttle 250 for axial travel
therewith while enabling the closure sleeve 260 to rotate relative
to the closure shuttle 250 about the shaft axis SA-SA. A closure
spring 268 is journaled on the closure sleeve 260 and serves to
bias the closure sleeve 260 in the proximal direction PD which can
serve to pivot the closure trigger into the unactuated position
when the shaft assembly 200 is operably coupled to the handle
14.
[0304] As was also indicated above, the elongate shaft assembly 200
further includes a firing member 220 that is supported for axial
travel within the shaft spine 210. The firing member 220 includes
an intermediate firing shaft portion 222 that is configured for
attachment to a distal cutting portion or firing beam 280. The
firing member 220 may also be referred to herein as a "second
shaft" and/or a "second shaft assembly". As can be seen in FIG. 4,
the intermediate firing shaft portion 222 may include a
longitudinal slot 223 in the distal end thereof which can be
configured to receive a tab 284 on the proximal end 282 of the
distal firing beam 280. The longitudinal slot 223 and the proximal
end 282 can be sized and configured to permit relative movement
therebetween and can comprise a slip joint 286. The slip joint 286
can permit the intermediate firing shaft portion 222 of the firing
drive 220 to be moved to articulate the surgical end effector 300
without moving, or at least substantially moving, the firing beam
280. Once the surgical end effector 300 has been suitably oriented,
the intermediate firing shaft portion 222 can be advanced distally
until a proximal sidewall of the longitudinal slot 223 comes into
contact with the tab 284 in order to advance the firing beam 280
and fire a staple cartridge that may be supported in the end
effector 300. As can be further seen in FIG. 4, the shaft spine 210
has an elongate opening or window 213 therein to facilitate
assembly and insertion of the intermediate firing shaft portion 222
into the shaft frame 210. Once the intermediate firing shaft
portion 222 has been inserted therein, a top frame segment 215 may
be engaged with the shaft frame 212 to enclose the intermediate
firing shaft portion 222 and firing beam 280 therein. Further
description of the operation of the firing member 220 may be found
in U.S. patent application Ser. No. 13/803,086, now U.S. Patent
Application Publication No. 2014/0263541.
[0305] Further to the above, the illustrated shaft assembly 200
includes a clutch assembly 400 which can be configured to
selectively and releasably couple the articulation driver 230 to
the firing member 220. In one form, the clutch assembly 400
includes a lock collar, or sleeve 402, positioned around the firing
member 220 wherein the lock sleeve 402 can be rotated between an
engaged position in which the lock sleeve 402 couples the
articulation driver 360 to the firing member 220 and a disengaged
position in which the articulation driver 360 is not operably
coupled to the firing member 200. When lock sleeve 402 is in its
engaged position, distal movement of the firing member 220 can move
the articulation driver 360 distally and, correspondingly, proximal
movement of the firing member 220 can move the proximal
articulation driver 230 proximally. When lock sleeve 402 is in its
disengaged position, movement of the firing member 220 is not
transmitted to the proximal articulation driver 230 and, as a
result, the firing member 220 can move independently of the
proximal articulation driver 230. In various circumstances, the
proximal articulation driver 230 can be held in position by the
articulation lock 350 when the proximal articulation driver 230 is
not being moved in the proximal or distal directions by the firing
member 220.
[0306] As can be further seen in FIG. 4, the lock sleeve 402 can
comprise a cylindrical, or an at least substantially cylindrical,
body including a longitudinal aperture 403 defined therein
configured to receive the firing member 220. The lock sleeve 402
can comprise diametrically-opposed, inwardly-facing lock
protrusions 404 and an outwardly-facing lock member 406. The lock
protrusions 404 can be configured to be selectively engaged with
the firing member 220. More particularly, when the lock sleeve 402
is in its engaged position, the lock protrusions 404 are positioned
within a drive notch 224 defined in the firing member 220 such that
a distal pushing force and/or a proximal pulling force can be
transmitted from the firing member 220 to the lock sleeve 402. When
the lock sleeve 402 is in its engaged position, a second lock
member 406 is received within a drive notch 232 defined in the
proximal articulation driver 230 such that the distal pushing force
and/or the proximal pulling force applied to the lock sleeve 402
can be transmitted to the proximal articulation driver 230. In
effect, the firing member 220, the lock sleeve 402, and the
proximal articulation driver 230 will move together when the lock
sleeve 402 is in its engaged position. On the other hand, when the
lock sleeve 402 is in its disengaged position, the lock protrusions
404 may not be positioned within the drive notch 224 of the firing
member 220 and, as a result, a distal pushing force and/or a
proximal pulling force may not be transmitted from the firing
member 220 to the lock sleeve 402. Correspondingly, the distal
pushing force and/or the proximal pulling force may not be
transmitted to the proximal articulation driver 230. In such
circumstances, the firing member 220 can be slid proximally and/or
distally relative to the lock sleeve 402 and the proximal
articulation driver 230.
[0307] As can also be seen in FIG. 4, the elongate shaft assembly
200 further includes a switch drum 500 that is rotatably received
on the closure sleeve 260. The switch drum 500 comprises a hollow
shaft segment 502 that has a shaft boss 504 formed thereon for
receive an outwardly protruding actuation pin 410 therein. In
various circumstances, the actuation pin 410 extends through a slot
267 into a longitudinal slot 408 provided in the lock sleeve 402 to
facilitate axial movement of the lock sleeve 402 when it is engaged
with the proximal articulation driver 230. A rotary torsion spring
420 is configured to engage the shaft boss 504 on the switch drum
500 and a portion of the nozzle housing 203 to apply a biasing
force to the switch drum 500. The switch drum 500 can further
comprise at least partially circumferential openings 506 defined
therein which, referring to FIGS. 5 and 6, can be configured to
receive circumferential mounts extending from the nozzle portions
202, 203 and permit relative rotation, but not translation, between
the switch drum 500 and the proximal nozzle 201. The mounts also
extend through openings 266 in the closure sleeve 260 to be seated
in recesses in the shaft spine 210. However, rotation of the nozzle
201 to a point where the mounts reach the end of their respective
slots 506 in the switch drum 500 will result in rotation of the
switch drum 500 about the shaft axis SA-SA. Rotation of the switch
drum 500 will ultimately result in the rotation of the actuation
pin 410 and the lock sleeve 402 between its engaged and disengaged
positions. Thus, in essence, the nozzle 201 may be employed to
operably engage and disengage the articulation drive system with
the firing drive system in the various manners described in further
detail in U.S. patent application Ser. No. 13/803,086, now U.S.
Patent Application Publication No. 2014/0263541.
[0308] As also illustrated in FIGS. 3 and 4, the elongate shaft
assembly 200 can comprise a slip ring assembly 600 which can be
configured to conduct electrical power to and/or from the end
effector 300 and/or communicate signals to and/or from the surgical
end effector 300, for example. The slip ring assembly 600 can
comprise a proximal connector flange 604 mounted to a chassis
flange 242 extending from the chassis 240 and a distal connector
flange 601 positioned within a slot defined in the shaft housings
202, 203. The proximal connector flange 604 can comprise a first
face and the distal connector flange 601 can comprise a second face
which is positioned adjacent to and movable relative to the first
face. The distal connector flange 601 can rotate relative to the
proximal connector flange 604 about the shaft axis SA-SA. The
proximal connector flange 604 can comprise a plurality of
concentric, or at least substantially concentric, conductors 602
defined in the first face thereof. A connector 607 can be mounted
on the proximal side of the distal connector flange 601 and may
have a plurality of contacts (not shown) wherein each contact
corresponds to and is in electrical contact with one of the
conductors 602. Such arrangement permits relative rotation between
the proximal connector flange 604 and the distal connector flange
601 while maintaining electrical contact therebetween. The proximal
connector flange 604 can include an electrical connector 606 which
can place the conductors 602 in signal communication with a shaft
circuit board 610 mounted to the shaft chassis 240, for example. In
at least one instance, a wiring harness comprising a plurality of
conductors can extend between the electrical connector 606 and the
shaft circuit board 610. The electrical connector 606 may extend
proximally through a connector opening 243 defined in the chassis
mounting flange 242. See FIG. 7. U.S. patent application Ser. No.
13/800,067, entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR
SYSTEM, filed on Mar. 13, 2013, now U.S. Patent Application
Publication No. 2014/0263552, is incorporated by reference herein
in its entirety. U.S. patent application Ser. No. 13/800,025,
entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, filed on
Mar. 13, 2013, now U.S. Patent Application Publication No.
2014/0263551 is incorporated by reference herein in its entirety.
Further details regarding slip ring assembly 600 may be found in
U.S. patent application Ser. No. 13/803,086, now U.S. Patent
Application Publication No. 2014/0263541.
[0309] As discussed above, the elongate shaft assembly 200 can
include a proximal portion which is fixably mounted to the handle
14 and a distal portion which is rotatable about a longitudinal
shaft axis SA-SA. The rotatable distal shaft portion can be rotated
relative to the proximal portion about the slip ring assembly 600,
as discussed above. The distal connector flange 601 of the slip
ring assembly 600 can be positioned within the rotatable distal
shaft portion. Moreover, further to the above, the switch drum 500
can also be positioned within the rotatable distal shaft portion.
When the rotatable distal shaft portion is rotated, the distal
connector flange 601 and the switch drum 500 can be rotated
synchronously with one another. In addition, the switch drum 500
can be rotated between a first position and a second position
relative to the distal connector flange 601. When the switch drum
500 is in its first position, the articulation drive system (i.e.,
the proximal articulation driver 230) may be operably disengaged
from the firing drive system and, thus, the operation of the firing
drive system may not articulate the end effector 300 of the shaft
assembly 200. When the switch drum 500 is in its second position,
the articulation drive system (i.e., the proximal articulation
driver 230) may be operably engaged with the firing drive system
and, thus, the operation of the firing drive system may articulate
the end effector 300 of the shaft assembly 200. When the switch
drum 500 is moved between its first position and its second
position, the switch drum 500 is moved relative to distal connector
flange 601. In various instances, the shaft assembly 200 can
comprise at least one sensor that is configured to detect the
position of the switch drum 500.
[0310] Referring again to FIG. 4, the closure sleeve assembly 260
includes a double pivot closure sleeve assembly 271. According to
various forms, the double pivot closure sleeve assembly 271
includes an end effector closure sleeve 272 that includes upper and
lower distally projecting tangs 273, 274. An upper double pivot
link 277 includes upwardly projecting distal and proximal pivot
pins that engage respectively an upper distal pin hole in the upper
proximally projecting tang 273 and an upper proximal pin hole in an
upper distally projecting tang 264 on the closure sleeve 260. A
lower double pivot link 278 includes upwardly projecting distal and
proximal pivot pins that engage respectively a lower distal pin
hole in the lower proximally projecting tang 274 and a lower
proximal pin hole in the lower distally projecting tang 265. See
also FIG. 6.
[0311] FIGS. 5-8 illustrate one form of surgical end effector 300
that is configured to be operably attached to an elongate shaft
assembly of a surgical instrument of the type described above or
other surgical instrument arrangements that include a closure
system that is configured to generate control motions for axially
moving a closure member that is configured to apply closing and
opening motions to portions of the surgical end effector. In the
illustrated example, as will be discussed in further detail below,
the surgical end effector is configured to be articulated relative
to a proximal portion of the elongate shaft assembly about an
articulation joint, generally designated as 339. Other
arrangements, however, may not be capable of articulation. As can
be seen in FIG. 6, the articulation joint 339 defines an
articulation axis B-B about which the surgical end effector 300 may
be selectively articulated. In the illustrated example, the
articulation axis B-B is substantially transverse to the shaft axis
SA-SA of the elongate shaft assembly.
[0312] The illustrated surgical end effector 300 includes a first
jaw 308 and a second jaw 309 that is selectively movable relative
to the first jaw 308 between an open position (FIG. 7) and various
closed positions (FIG. 8). In the illustrated embodiment, the first
jaw 308 comprises an elongate channel 302 that is configured to
operably support a surgical staple cartridge 304 therein and the
second jaw 309 comprises an anvil 310. However, other surgical jaw
arrangements may be employed without departing from the spirit and
scope of the present invention. As can be seen in FIG. 5, a support
pan 305 may be attached to the surgical staple cartridge 304 to
provide added support thereto as well as to prevent the staple
drivers (not shown) that are supported in the staple pockets 306
that are formed in the surgical staple cartridge 304 from falling
out of the surgical staple cartridge prior to use. As can be seen
in FIG. 5, the elongate channel 302 has a proximal end portion 320
that includes two upstanding lateral walls 322. The anvil 310
includes an anvil body 312 that has a staple-forming undersurface
313 formed thereon. A proximal end 314 of the anvil body is
bifurcated by a firing member slot 315 that defines a pair of anvil
attachment arms 316. Each anvil attachment arm 316 includes a
sloping upper surface 321 and includes a laterally protruding anvil
trunnion 317 and a cam slot 318 that defines a cam surface or
"slotted cam surface" 319. See FIG. 5. One of the cam slots 318 may
be referred to herein as a "first cam slot" with the cam surface
thereof being referred to as the "first cam surface". Similarly,
the other cam slot 318 may be referred to as a "second cam slot"
with the cam surface thereof being referred to herein as the
"second cam surface". A trunnion hole 324 is provided in each
lateral wall 322 of the elongate channel 302 for receiving a
corresponding one of the anvil trunnions 317 therein. Such
arrangement serves to movably affix the anvil 310 to the elongate
channel 302 for selective pivotable travel about an anvil axis A-A
that is defined by trunnion holes 324 and which is transverse to
the shaft axis SA-SA. See FIG. 6.
[0313] In the illustrated arrangement, the anvil 310 is pivotally
moved relative to the elongate channel 302 and the surgical staple
cartridge 304 supported therein to an open position by a pair of
opening cams 354 that may be removably supported in or removably
attached to or permanently attached to or integrally formed in an
anvil actuator member. In the illustrated embodiment, the anvil
actuator member comprises the end effector closure sleeve 272. See
FIG. 5. Each opening cam 354 includes an outer body portion 356
that has a cam tab 358 protruding inwardly therefrom. The outer
body portion 356 is, in at least one arrangement, configured to be
snapped into removable engagement within a corresponding cam hole
355 formed in the end effector closure sleeve 272. For example, the
outer body portion 356 may include a chamfered stop portion 357
that is configured to snappingly engage a corresponding portion of
the end effector closure sleeve wall that defines the cam hole 355.
Another portion of the outer body portion 356 may have a dog leg
feature 359 formed thereon that is configured to be received inside
a portion of the end effector closure sleeve 272 adjacent the cam
hole 355. Other snap tab arrangements may also be employed to
removably affix the outer body portion 356 to the end effector
closure sleeve 272. In other arrangements, for example, the outer
body portion may not be configured for snapping engagement with the
end effector closure sleeve 272. In such arrangements, the outer
body portions may be retained in position by an annular crimp ring
that extends around the outer circumference of the end effector
closure sleeve over the outer body portions of the opening cams and
be crimped in place. The crimp ring serves to trap the outer body
portions against the outer surface of the end effector closure
sleeve. To provide the end effector closure sleeve with a
relatively smooth or uninterrupted outer surface which may
advantageously avoid damage to adjacent tissue and/or collection of
tissue/fluid etc. between those components, the crimp ring may
actually be crimped into an annular recess that is formed in the
end effector closure sleeve.
[0314] When the opening cams 350 are installed in the end effector
closure sleeve 272, each cam tab 358 extends through an elongate
slot 326 in the corresponding lateral wall 322 of the elongate
channel 302 to be received in a corresponding cam slot 318 in the
anvil 310. See FIG. 6. In such arrangement, the opening cams 350
are diametrically opposite of each other in the end effector
closure sleeve. In use, the closure sleeve 260 is translated
distally (direction DD) to close the anvil 310, for example, in
response to the actuation of the closure trigger 32. The anvil 310
is closed as the closure sleeve 260 is translated in the distal
direction DD so as to bring the distal end 275 of the of end
effector closure sleeve 272 into contact with a closure lip 311 on
the anvil body 312. In particular, the distal end 275 of the end
effector closure sleeve 272 rides on the upper surfaces 321 of the
anvil attachment arms 316 as the closure sleeve 260 is moved
distally to begin to pivot the anvil 310 to a closed position. In
one arrangement for example, closure of the anvil 310 is solely
caused by contact of the end effector closure sleeve 272 with the
anvil 310 and is not caused by the interaction of the opening cams
with the anvil. In other arrangements, however, the opening cams
could be arranged to also apply closing motions to the anvil as the
closure sleeve 260 is moved distally. The anvil 310 is opened by
proximally translating the closure sleeve 260 in the proximal
direction PD which causes the cam tabs 358 to move in the proximal
direction PD within the cam slots 318 on the cam surfaces 319 to
pivot the anvil 310 into the open position as shown in FIGS. 6 and
7.
[0315] The surgical end effector embodiment 300 employs two opening
cams to effect positive opening of the end effector jaws, even when
under a load. Other arrangements could conceivably employ only one
opening cam or more than two opening cams without departing from
the spirit and scope of the present invention. In the illustrated
example, the opening cams are removably affixed to the end effector
closure sleeve which facilitates easy assembly or attachment of the
surgical end effector components to the elongate shaft assembly as
well as disassembly thereof. Such configurations also enable the
use of more compact or shorter articulation joint arrangements
which further facilitate better manipulation of the surgical end
effector within the confined spaces inside of a patient. To
facilitate easy detachment of those opening cams that are snapped
in place, additional strategically placed holes may be provided in
the end effector closure sleeve to enable a pry member to be
inserted therethrough to pry the opening cams out of the end
effector closure sleeve. In still other arrangements, the opening
cam(s) may be integrally formed in the anvil actuator member or end
effector closure sleeve. For example, the opening cam(s) may each
comprise a tab that is cut into or otherwise formed into the wall
of the anvil actuator member or end effector closure sleeve and
then bent, crimped or permanently deformed inward so as to engage
the corresponding cam surface on the second jaw. For example, the
tab may be bent inward at ninety degrees (90.degree.) relative to
the outer wall of the end effector closure sleeve. Such
arrangements avoid the need for separate opening cam components.
Other variations may employ a pin or pins that are attached to the
second jaw and configured to ride on corresponding cam surfaces on
the first jaw. The pin or pins may be pressed into the first jaw,
knurled and then pressed in and/or welded to the first jaw, for
example. While the opening cam arrangements discussed above have
been described in the context of a surgical end effector that is
configured to support a surgical staple cartridge and includes an
anvil that is configured to move relative to the surgical staple
cartridge, the reader will appreciate that the opening cam
arrangements may also be employed with other end effector
arrangements that have jaw(s) that are movable relative to each
other.
[0316] FIGS. 9 and 10 illustrate an elongate shaft assembly
designated as 200' that employs many of the features of elongate
shaft assembly 200 described above. In the illustrated example, the
elongate shaft assembly 200' includes a dual articulation link
arrangement designated as 800 that employs an articulation lock 810
that is similar to articulation lock 350 described above. Those
components of articulation lock 810 that differ from the components
of articulation lock 350 and which may be necessary to understand
the operation of articulation lock 350 will be discussed in further
detail below. Further details regarding articulation lock 350 may
be found in U.S. patent application Ser. No. 13/803,086, entitled
ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN ARTICULATION LOCK,
now U.S. Patent Application Publication No. 2014/0263541, the
entire disclosure of which is hereby incorporated by reference
herein. The articulation lock 810 can be configured and operated to
selectively lock the surgical end effector 300 in various
articulated positions. Such arrangement enables the surgical end
effector 300 to be rotated, or articulated, relative to the shaft
closure sleeve 260 when the articulation lock 810 is in its
unlocked state.
[0317] As was discussed above, when the proximal articulation
driver 230 is operatively engaged with the firing member 220 via
the clutch system 400, the firing member 220 can move the proximal
articulation driver 230 proximally and/or distally. For instance,
proximal movement of the firing member 220 can move the proximal
articulation driver 230 proximally and, similarly, distal movement
of the firing member 220 can move the proximal articulation driver
230 distally. Movement of the proximal articulation driver 230,
whether it be proximal or distal, can unlock the articulation lock
810, as described in greater detail further below. As can be seen
in FIG. 9 for example, the elongate shaft assembly 200' includes a
shaft frame 812 which is somewhat co-extensive with a first distal
articulation driver 820. A first distal articulation driver 820 is
supported within the elongate shaft assembly 200' for selective
longitudinal travel in a distal direction DD and a proximal
direction PD in response to corresponding articulation control
motions applied thereto. The shaft frame 812 includes a distal end
portion 814 that has a downwardly protruding pivot pin (not shown)
thereon that is adapted to be pivotally received within a pivot
hole 328 formed in the proximal end portion 320 of the elongate
channel 302. See, for example, the similar arrangement depicted in
FIG. 5. Such arrangement facilitates pivotal travel of the elongate
channel 302 of the surgical end effector 300 relative to the shaft
frame 812 about an articulation axis B-B that is defined by the
pivot hole 328. As indicated above, the articulation axis B-B is
transverse to the shaft axis SA-SA that is defined by elongate
shaft assembly 200'.
[0318] Referring again to FIG. 9, the first distal articulation
driver 820 includes a first, or distal, lock cavity 822 and a
second, or proximal, lock cavity 824, wherein the first lock cavity
822 and the second lock cavity 824 can be separated by an
intermediate frame member 825. The articulation lock 810 can
further include at least one first lock element 826 at least
partially positioned within the first lock cavity 822 which can be
configured to inhibit or prevent the proximal movement of the first
distal articulation driver 820. In the embodiment illustrated in
FIG. 9, for example, there are three first lock elements 826
positioned within the first lock cavity 822 which can all act in a
similar, parallel manner and can co-operatively act as a single
lock element. Other embodiments are envisioned which can utilize
more than three or less than three first lock elements 826.
Similarly, the articulation lock 810 can further include at least
one second lock element 828 at least partially positioned within
the second lock cavity 824 which can be configured to inhibit or
prevent the distal movement of the first distal articulation driver
820. With regard to the particular embodiment illustrated in FIG.
9, there are three second lock elements 828 positioned within the
second lock cavity 824 which can all act in a similar, parallel
manner and can co-operatively act as a single lock element. Other
embodiments are envisioned which can utilize more than three or
less than three second lock elements 828.
[0319] Further to the above, referring primarily to FIG. 9, each
first lock element 826 is slidably supported on a frame rail 830
and includes a lock tang 827. Each of the first lock elements 826
have a lock aperture therein (not shown) for receiving the frame
rail 830 therethrough. The lock tang 827 can be disposed within the
first lock cavity 822 and the lock aperture can be slidably engaged
with a frame rail 830 mounted to the shaft frame 812. The first
lock elements 826 are not oriented in a perpendicular arrangement
with the frame rail 830; rather, the first lock elements 826 are
arranged and aligned at a non-perpendicular angle with respect to
the frame rail 830 such that the edges or sidewalls of the lock
apertures are engaged with the frame rail 830. Moreover, the
interaction between the sidewalls of the lock apertures and the
frame rail 830 can create a resistive or friction force
therebetween which can inhibit relative movement between the first
lock elements 826 and the frame rail 830 and, as a result, resist a
proximal pushing force P applied to the first distal articulation
driver 820. Stated another way, the first lock elements 826 can
prevent or at least inhibit the surgical end effector 300 from
rotating in a direction indicated by arrow 821. If a torque is
applied to the end effector 300 in the direction of arrow 821, a
proximal pushing force P will be transmitted to the distal
articulation driver 820. The proximal pushing force P will only
serve to bolster the locking engagement between the first lock
elements 826 and the frame rail 830. More particularly, the
proximal pushing force P can be transmitted to the tangs 827 of the
first lock elements 826 which can cause the first lock elements 826
to rotate and decrease the angle defined between first lock
elements 826 and the frame rail 830 and, as a result, increase the
bite between the sidewalls of the lock apertures and the frame rail
830. Ultimately, then, the first lock elements 826 can lock the
movement of the first distal articulation driver 820 in one
direction.
[0320] To release the first lock elements 826 and permit the
surgical end effector 300 to be rotated in the direction indicated
by arrow 821, the proximal articulation driver 230 can be pulled
proximally to straighten, or at least substantially straighten, the
first lock elements 826 into a perpendicular, or at least
substantially perpendicular, position. In such a position, the
bite, or resistive force, between the sidewalls of the lock
apertures and the frame rail 830 can be sufficiently reduced, or
eliminated, such that the first distal articulation driver 820 can
be moved proximally. To straighten the first lock elements 826, the
proximal articulation driver 230 can be pulled proximally such that
a distal arm 233 of the proximal articulation driver 230 contacts
the first lock elements 826 to pull and rotate the first lock
elements 826 into their straightened position. In various
circumstances, the proximal articulation driver 230 can continue to
be pulled proximally until a proximal arm 235 extending therefrom
contacts, or abuts, a proximal drive wall 832 of the first distal
articulation driver 820 and pulls the distal articulation driver
820 proximally to articulate the surgical end effector 300. In
essence, a proximal pulling force can be applied from the proximal
articulation driver 230 to the distal articulation driver 820
through the interaction between the proximal arm 235 and the
proximal drive wall 832 wherein such a pulling force can be
transmitted through the first distal drive member 820 to the end
effector 300 as will be further discussed below to articulate the
end effector 300 in the direction indicated by arrow 821. After the
surgical end effector 300 has been suitably articulated in the
direction of arrow 821, the first distal articulation driver 820
can be released, in various circumstances, to permit the
articulation lock 810 to re-lock the first distal articulation
driver 820, and the surgical end effector 300, in position.
[0321] Concurrent to the above, referring again to FIG. 9, the
second lock elements 828 can remain in an angled position while the
first lock elements 826 are locked and unlocked as described above.
The reader will appreciate that, although the second lock elements
828 are arranged and aligned in an angled position with respect to
the shaft rail 830, the second lock elements 828 are not configured
to impede, or at least substantially impede, the proximal motion of
the first distal articulation driver 820. When the first distal
articulation driver 820 and articulation lock 810 are slid
proximally, as described above, the second lock elements 828 can
slide distally along the frame rail 830 without, in various
circumstances, changing, or at least substantially changing, their
angled alignment with respect to the frame rail 830. While the
second lock elements 828 are permissive of the proximal movement of
the first distal articulation driver 820 and the articulation lock
810, the second lock elements 828 can be configured to selectively
prevent, or at least inhibit, the distal movement of the first
distal articulation driver 820, as discussed in greater detail
further below.
[0322] Each second lock element 828 can comprise a lock aperture
(not shown) and a lock tang 829. The lock tang 829 can be disposed
within the second lock cavity 824 and the lock aperture can be
slidably engaged with the frame rail 830 mounted to the shaft frame
812. The frame rail 830 extends through the apertures in the second
lock elements 828. The second lock elements 828 are not oriented in
a perpendicular arrangement with the frame rail 830; rather, the
second lock elements 828 are arranged and aligned at a
non-perpendicular angle with respect to the frame rail 830 such
that the edges or sidewalls of the lock apertures are engaged with
the frame rail 830. Moreover, the interaction between the sidewalls
of the lock apertures and the frame rail 830 can create a resistive
or friction force therebetween which can inhibit relative movement
between the second lock elements 828 and the frame rail 830 and, as
a result, resist a distal force D applied to the first distal
articulation driver 820. Stated another way, the second lock
elements 828 can prevent or at least inhibit the surgical end
effector 300 from rotating in a direction indicated by arrow 823.
If a torque is applied to the end effector 300 in the direction of
arrow 823, a distal pulling force D will be transmitted to the
first distal articulation driver 820. The distal pulling force D
will only serve to bolster the locking engagement between the
second lock elements 828 and the frame rail 830. More particularly,
the distal pulling force D can be transmitted to the tangs 829 of
the second lock elements 828 which can cause the second lock
elements 828 to rotate and decrease the angle defined between
second lock elements 828 and the frame rail 830 and, as a result,
increase the bite between the sidewalls of the lock apertures and
the frame rail 830. Ultimately, then, the second lock elements 828
can lock the movement of the first distal articulation driver 820
in one direction.
[0323] To release the second lock elements 828 and permit the
surgical end effector 300 to be articulated in the direction
indicated by arrow 823, the proximal articulation driver 230 can be
pushed distally to straighten, or at least substantially
straighten, the second lock elements 828 into a perpendicular, or
at least substantially perpendicular, position. In such a position,
the bite, or resistive force, between the sidewalls of the lock
apertures and the frame rail 830 can be sufficiently reduced, or
eliminated, such that the first distal articulation driver 820 can
be moved distally. To straighten the second lock elements 828, the
proximal articulation driver 230 can be pushed distally such that
the proximal arm 235 of the proximal articulation driver 230
contacts the second lock elements 828 to push and rotate the second
lock elements 828 into their straightened position. In various
circumstances, the proximal articulation driver 230 can continue to
be pushed distally until the distal arm 233 extending therefrom
contacts, or abuts, a distal drive wall 833 of the first distal
articulation driver 820 and pushes the first distal articulation
driver 820 distally to articulate the surgical end effector 300. In
essence, a distal pushing force can be applied from the proximal
articulation driver 230 to the first distal articulation driver 820
through the interaction between the distal arm 233 and the distal
drive wall 833 wherein such a pushing force can be transmitted
through the first distal articulation driver 820 to articulate the
end effector 300 in the direction indicated by arrow 823. After the
surgical end effector 300 has been suitably articulated in the
direction of arrow 823, the first distal articulation driver 820
can be released, in various circumstances, to permit the
articulation lock 810 to re-lock the first distal articulation
driver 820, and the surgical end effector 300, in position.
[0324] Concurrent to the above, the first lock elements 826 can
remain in an angled position while the second lock elements 828 are
locked and unlocked as described above. The reader will appreciate
that, although the first lock elements 826 are arranged and aligned
in an angled position with respect to the shaft rail 830, the first
lock elements 826 are not configured to impede, or at least
substantially impede, the distal motion of the first distal
articulation driver 820. When the first distal articulation driver
820 and articulation lock 810 are slid distally, as described
above, the first lock elements 826 can slide distally along the
frame rail 830 without, in various circumstances, changing, or at
least substantially changing, their angled alignment with respect
to the frame rail 830. While the first lock elements 826 are
permissive of the distal movement of the first distal articulation
driver 820 and the articulation lock 810, the first lock elements
826 are configured to selectively prevent, or at least inhibit, the
proximal movement of the first distal articulation driver 820, as
discussed above.
[0325] In view of the above, the articulation lock 810, in a locked
condition, can be configured to resist the proximal and distal
movements of the first distal articulation driver 820. In terms of
resistance, the articulation lock 810 can be configured to prevent,
or at least substantially prevent, the proximal and distal
movements of the first distal articulation driver 820.
Collectively, the proximal motion of the first distal articulation
driver 820 is resisted by the first lock elements 826 when the
first lock elements 826 are in their locked orientation and the
distal motion of the first distal articulation driver 820 is
resisted by the second lock elements 828 when the second lock
elements 828 are in their locked orientation, as described above.
Stated another way, the first lock elements 826 comprise a first
one-way lock and the second lock elements 828 comprise a second
one-way lock which locks in an opposite direction.
[0326] Discussed in connection with the exemplary embodiment
illustrated in FIGS. 9 and 10, an initial proximal movement of the
proximal articulation driver 230 can unlock the proximal movement
of the first distal articulation driver 820 and the articulation
lock 810 while a further proximal movement of the proximal
articulation driver 230 can drive the first distal articulation
driver 820 and the articulation lock 810 proximally. Similarly, an
initial distal movement of the proximal articulation driver 230 can
unlock the distal movement of the first distal articulation driver
820 and the articulation lock 810 while a further distal movement
of the proximal articulation driver 230 can drive the first distal
articulation driver 820 and the articulation lock 810 distally.
Such a general concept is discussed in connection with several
additional exemplary embodiments disclosed below. To the extent
that such discussion is duplicative, or generally cumulative, with
the discussion provided above, such discussion is not reproduced
for the sake of brevity.
[0327] Still referring to FIGS. 9 and 10, the dual articulation
link arrangement 800 is configured to establish a "push/pull"
arrangement when an articulation force is applied thereto through
the first distal articulation driver 820. As can be seen in those
Figures, the first distal articulation driver 820 has a first drive
rack 842 formed therein. A first articulation rod 844 protrudes
distally out of the first distal articulation driver 820 and is
attached to a first movable coupler 850 that is attached to the
first distal articulation driver 820 by a first ball joint 852. The
first coupler 850 is also pivotally pinned to the proximal end
portion 320 of the elongate channel 302 by a first pin 854 as can
be seen in FIG. 9. The dual articulation link arrangement 800
further comprises a second distal articulation driver 860 that has
a second drive rack 862 formed therein. The second distal
articulation driver 860 is movably supported within the elongate
shaft assembly 200' for longitudinal travel in the distal direction
DD and the proximal direction PD. A second articulation rod 864
protrudes distally out of the second distal articulation driver 860
and is attached to a second movable coupler 870 that is attached to
the second distal articulation driver 860 by a second ball joint
872. The second coupler 870 is also pivotally pinned to the
proximal end portion 320 of the elongate channel 302 by a second
pin 874 as can be seen in FIG. 9. As can be seen in FIG. 9, the
first coupler 850 is attached to the elongate channel 302 on one
lateral side of the shaft axis SA and the second coupler 870 is
attached to the elongate channel 302 on an opposite lateral side of
the shaft axis. Thus, by simultaneously pulling on one of the
couplers 850, 870 and pushing on the other coupler 850,870, the
surgical end effector 300 will be articulated about the
articulation axis B-B relative to the elongate shaft assembly 200'.
In the illustrated arrangements, although the couplers 850, 870
that facilitate relative movement between the first and second
distal articulation drivers 820, 860, respectively and the elongate
channel 302 are fabricated from relatively rigid components, other
arrangements may employ relatively "flexible" coupler arrangements.
For example cable(s), etc. may extend through one or both of the
distal articulation drivers 820, 860, couplers 850, 870 and the
ball joints 852, 872, to be coupled to the elongate channel to
facilitate the transfer of articulation motions thereto.
[0328] As can also be seen in FIGS. 9 and 10, a proximal pinion
gear 880 and a distal pinion gear 882 are centrally disposed
between the first drive rack 842 and the second drive rack 862 and
are in meshing engagement therewith. In alternative embodiments,
only one pinion gear or more than two pinion gears may be employed.
Thus, at least one pinion gear is employed. The proximal pinion
gear 880 and the distal pinion gear 882 are rotatably supported in
the shaft frame 812 for free rotation relative thereto such that as
the first distal articulation driver 820 is moved in the distal
direction DD, the pinion gears 870, 872 serve to drive the second
distal articulation driver 860 in the proximal direction PD.
Likewise, when the first distal articulation driver 820 is pulled
in the proximal direction PD, the pinion gears 880, 882 drive the
second distal articulation driver 860 in the distal direction DD.
Thus, to articulate the end effector 300 about the articulation
axis B-B in the direction of arrow 821, the articulation driver 230
is operatively engaged with the firing member 220 via the clutch
system 400 such that the firing member 220 moves or pulls the
proximal articulation driver 230 in the proximal direction PD.
Movement of the proximal articulation driver 230 in the proximal
direction moves the first distal articulation driver 820 in the
proximal direction as well. As the first distal articulation driver
820 moves the in the proximal direction, the pinion gears 880, 882
serve to drive the second distal articulation driver 860 in the
distal direction DD. Such movement of the first and second distal
articulation drivers 820, 860 causes the surgical end effector 300
and more specifically, the elongate channel 302 of the surgical end
effector 300 to pivot about the articulation axis B-B in the
articulation direction of arrow 821. Conversely, to articulate the
end effector 300 in the direction of arrow 823, the firing member
220 is actuated to push the first distal articulation driver 820 in
the distal direction DD. As the first distal articulation driver
820 moves the in the distal direction, the pinion gears 880, 882
serve to drive the second distal articulation driver 860 in the
proximal direction PD. Such movement of the first and second distal
articulation drivers 820, 860 causes the surgical end effector 300
and more specifically, the elongate channel 302 of the surgical end
effector 300 to pivot about the articulation axis B-B in the
articulation direction of arrow 823.
[0329] The dual solid link articulation arrangement 800 and its
variations may afford the surgical end effector with a greater
range of articulation when compared to other articulatable surgical
end effector configurations. In particular, the solid link
articulation arrangements disclosed herein may facilitate ranges of
articulation that exceed ranges of 45-50.degree. that are commonly
achieved by other articulatable end effector arrangements. Use of
at least one pinion gear to interface between the distal
articulation drivers enable the end effector to be "pushed" and
"pulled" into position also may reduce the amount of end effector
"slop" or undesirable or unintended movement during use. The dual
solid link articulation arrangements disclosed herein also comprise
an articulation system that has improved strength characteristics
when compared to other articulation system arrangements.
[0330] As was briefly discussed above, the intermediate firing
shaft portion 222 is configured to operably interface with a distal
cutting or firing beam 280. The distal firing beam 280 may comprise
a laminated structure. Such arrangement enables the distal firing
beam 280 to sufficiently flex when the surgical end effector 300 is
articulated about the articulation axis B-B. The distal firing beam
280 is supported for axial movement within the shaft assembly 200'
and is slidably supported by two upstanding lateral support walls
330 formed on the proximal end of the elongate channel 302.
Referring to FIG. 11, the distal firing beam 280 is attached to a
firing member 900 that includes a vertically-extending firing
member body 902 that has a tissue cutting surface or blade 904
thereon. In addition, a wedge sled 910 may be mounted within the
surgical staple cartridge 304 for driving contact with the firing
member 900. As the firing member 900 is driven distally through the
cartridge body 304, the wedge surfaces 912 on the wedge sled 910
contact the staple drivers to actuate the drivers and the surgical
staples supported thereon upwardly in the surgical staple cartridge
304.
[0331] End effectors that employ firing beams or firing members and
which are capable of articulating over a range of, for example,
forty five degrees (45.degree.) may have numerous challenges to
overcome. To facilitate operable articulation of such end
effectors, the firing member or firing beam must be sufficiently
flexible to accommodate such range of articulation. However, the
firing beam or firing member must also avoid buckling while
encountering the compressive firing loads. To provide additional
support to the firing beam or firing member various "support" or
"blowout" plate arrangements have been developed. Several of such
arrangements are disclosed in U.S. Pat. No. 6,964,363, entitled
SURGICAL STAPLING INSTRUMENT HAVING ARTICULATION JOINT SUPPORT
PLATES FOR SUPPORTING A FIRING BAR and U.S. Pat. No. 7,213,736,
entitled SURGICAL STAPLING INSTRUMENT INCORPORATING AN
ELECTROACTIVE POLYMER ACTUATED FIRING BAR TRACK THROUGH AN
ARTICULATION JOINT, the entire disclosures of each being hereby
incorporated by reference herein. Blowout plates that provide
substantial buckle resistance also are difficult to bend in general
which adds to the forces the articulation joint system must
accommodate. Other firing beam support arrangements are disclosed
in U.S. patent application Ser. No. 14/575,117, entitled SURGICAL
INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND MOVABLE FIRING
BEAM SUPPORT ARRANGEMENTS, the entire disclosure of which is hereby
incorporated by reference herein.
[0332] Referring to FIGS. 11-15, the elongate shaft assembly 200'
further comprises a multiple support link assembly 920 for
providing lateral support to the distal firing beam 280 as the
surgical end effector 300 is articulated about the articulation
axis B-B. As can be seen in FIG. 11, the multiple support link
assembly 920 comprises a middle support member 922 that is movably
coupled to the surgical end effector 300 as well as the elongate
shaft assembly 200'. For example, the middle support member 922 is
pivotally pinned to the proximal end 320 of the elongate channel
302 such that it is pivotable relative thereto about a pivot axis
PA. As can be seen in FIG. 11, the middle support member 922
includes a distally protruding tab 923 that has a distal pivot hole
924 therein for receiving an upstanding support pin 332 that is
formed on the proximal end portion 320 of the elongate channel 302.
As can be further seen in FIG. 11, the middle support member 922
further includes a proximally protruding tab 926 that has an
elongate proximal slot 928 therein. The proximal slot 928 is
configured to slidably receive a middle support pin 816 that is
formed on the frame portion 812. Such arrangement enables the
middle support member 922 to pivot and move axially relative to
said elongate shaft assembly 200', for example. As can be seen in
FIGS. 11-13, the middle support member 922 further includes
centrally disposed slot 930 for movably receiving the distal firing
beam 280 therethrough.
[0333] Still referring to FIGS. 11-15, the multiple support link
assembly 920 further comprises a proximal support link 940 and a
distal support link 950. The proximal support link 940 includes an
elongate proximal body 942 that has a rounded proximal nose portion
943 and a rounded distal nose portion 944. The proximal support
link 940 further includes a pair of downwardly protruding, opposed
proximal support walls 945, 946 that define a proximal slot 947
therebetween. Similarly, the distal support link 950 includes an
elongate distal body 952 that has a rounded proximal nose portion
953 and a rounded distal nose portion 954. The distal support link
950 further includes a pair of downwardly protruding opposed distal
support walls 955, 956 that define a distal slot 957 therebetween.
As can be seen in FIG. 14, the flexible distal firing beam 280 is
configured to extend between the proximal support walls 945, 946 of
the proximal support link 940 and the distal support walls 955, 956
of the distal support link 950. The proximal support wall 945
includes an inwardly facing proximal arcuate surface 948 and the
proximal support wall 946 includes an inwardly facing proximal
arcuate support surface 949 that opposes said inwardly facing
proximal arcuate surface 948. The proximal arcuate support surfaces
948, 949 serve to provide lateral support to the lateral side
portions of a proximal portion of the flexible distal firing beam
280 as it flexes during articulation of the end effector and
traverses the articulation joint. The radiused surfaces may match
the outer radius of the distal firing beam 280 depending upon the
direction of articulation. Similarly, the distal support wall 955
includes an inwardly facing distal arcuate surface 958 and the
distal support wall 956 includes an inwardly facing distal arcuate
support surface 959 that opposes said distal arcuate surface 958.
The distal arcuate support surfaces 958, 959 serve to provide
lateral support to the lateral side portions of a distal portion of
the distal firing beam 280 as it flexes during articulation of the
surgical end effector 300 and traverses the articulation joint. The
distal arcuate surfaces 958, 959 may match the outer radius of the
distal firing beam 280 depending upon the direction of
articulation. As can be seen in FIGS. 12 and 13, the distal end 217
of the shaft spine 210 includes a distally-facing arcuate spine
pocket 218 into which the rounded proximal nose portion 943 of the
proximal support link 940 extends. The rounded distal nose portion
944 of the proximal support link 940 is pivotally received in an
arcuate proximal pocket 932 in the middle support member 922. In
addition, the rounded proximal nose portion 953 of the distal
support link is received in an arcuate distal support member pocket
934 in the distal end of the middle support member 922. The rounded
distal nose portion 954 of the distal support link 950 is movably
received within a V-shaped channel cavity 334 formed in the
upstanding lateral support walls 330 formed on the proximal end 320
of the elongate channel 302.
[0334] The multiple support linkage assembly may provide higher
lateral support to the flexible firing beam laminates as the beam
flexes across higher articulation angles. Such arrangements also
prevent the firing beam from buckling under high firing loads and
across relatively high articulation angles. The elongate support
links, in connection with the middle support member, serve to
provide improved lateral support to the firing beam across the
articulation zone when compared to many prior support arrangements.
In alternative arrangements, the support links may be configured to
actually interlock with the middle support member at various
articulation angles. The U-shaped support links facilitate easy
installation and serve to provide support to the flexible support
beams on each lateral side as well as to the top of the firing beam
to prevent the firing beam from bowing upwards during firing while
being articulated.
[0335] In those embodiments wherein the firing member includes a
tissue cutting surface, it may be desirable for the elongate shaft
assembly to be configured in such a way so as to prevent the
inadvertent advancement of the firing member unless an unspent
staple cartridge is properly supported in the elongate channel 302
of the surgical end effector 300. If, for example, no staple
cartridge is present at all and the firing member is distally
advanced through the end effector, the tissue would be severed, but
not stapled. Similarly, if a spent staple cartridge (i.e., a staple
cartridge wherein at least some of the staples have already been
fired therefrom) is present in the end effector and the firing
member is advanced, the tissue would be severed, but may not be
completely stapled, if at all. It will be appreciated that such
occurrences could lead to undesirable catastrophic results during
the surgical procedure. U.S. Pat. No. 6,988,649 entitled SURGICAL
STAPLING INSTRUMENT HAVING A SPENT CARTRIDGE LOCKOUT, U.S. Pat. No.
7,044,352 entitled SURGICAL STAPLING INSTRUMENT HAVING A SINGLE
LOCKOUT MECHANISM FOR PREVENTION OF FIRING, and U.S. Pat. No.
7,380,695 entitled SURGICAL STAPLING INSTRUMENT HAVING A SINGLE
LOCKOUT MECHANISM FOR PREVENTION OF FIRING each disclose various
firing member lockout arrangements, each of which is hereby
incorporated by reference in its entirety herein.
[0336] Such lockout arrangements may be effectively employed with a
variety of surgical stapling instruments. Those arrangements,
however, may not be particularly well-suited for use in connection
with various surgical stapling instruments disclosed herein that
employ relatively compact and short articulation joint
configurations. For example, FIGS. 15-19 illustrate a surgical end
effector 300 that is operably attached to an elongate shaft
assembly 200' by an articulation joint 270'. The elongate shaft
assembly 200' defines a shaft axis SA-SA and the articulation joint
270' facilitates selective articulation of the surgical end
effector 300 relative to the elongate shaft assembly 200' about an
articulation axis B-B that is transverse to the shaft axis SA-SA.
In the illustrated embodiment, a dual solid link articulation
arrangement 800 (as was described above) may be employed to
selectively apply articulation motions to the surgical end effector
300. The elongate shaft assembly 200' comprises a distal firing
beam 280 of the type described above that is selectively axially
movable within the surgical end effector 300 from a starting
position to an ending position upon application of firing motions
thereto. The distal firing beam 280 extends through the
articulation joint 270' and is configured to flex about the
articulation axis B-B to accommodate articulation of the surgical
end effector 300 in the various manners described herein. In the
illustrated embodiment, the articulation joint 270' includes a
middle support member 922 that is movably attached to the distal
end 814 of the shaft frame 812 and the proximal end 320 of the
elongate channel 302. As was discussed above, the middle support
member 922 includes a distally protruding tab 923 that has a distal
pivot hole 924 therein for receiving an upstanding support pin 332
formed on the proximal end portion 320 of the elongate channel 302.
The middle support member 922 further includes a proximally
protruding tab 926 that has an elongate proximal slot 928 therein.
The proximal slot 928 is configured to slidably receive a middle
support pin 816 formed on the frame portion 812. The middle support
922 further includes a centrally disposed slot 930 for axially
receiving the distal firing beam 280 therethrough. The middle
support member 922 provides lateral support to the distal firing
beam 280 during articulation of the surgical end effector 300 about
the articulation axis B-B while facilitating its axial passage of
the distal firing beam 280 therethrough during firing.
[0337] In the illustrated embodiment, a firing beam locking
assembly 980 is employed to prevent the distal firing beam 280 from
being inadvertently advanced from the starting position to the
ending position unless an unfired surgical staple cartridge 304 has
been operably seated in the cartridge support member or elongate
channel 302. As can be seen in FIGS. 15-19, the firing beam locking
assembly 980 in one form includes a locking cam or detent 281 that
is formed in the distal firing beam 280 such that it protrudes
upwardly from the upper surface thereof. A biasing member 984 is
supported on and attached to the middle support member 922. As can
be seen in FIG. 16, for example, the biasing member 984 is
substantially planar and includes a window 985 that is configured
to accommodate the locking cam 281 therein during articulation of
the surgical end effector 300. Thus, as the surgical end effector
300 is articulated about the articulation axis B-B, the biasing
member 984 does not apply any biasing force or load to the distal
firing beam 280. This feature may avoid adding to the amount of
articulation forces that must be generated to articulate the
surgical end effector 300 about the articulation axis B-B. The
biasing member 984 may be tack welded to the middle support member
922 or be attached thereto by other fastener methods such as by
screws, pins, adhesive, etc. The window 985 may also define a
locking band or portion 986 that serves to contact the locking cam
281 when the distal firing beam 280 is in the starting position.
The locking cam 281 may be formed with a distal-facing sloping
surface 283 and a proximally-facing sloping surface 285 to reduce
the amount of firing force and retraction force required to axially
move the distal firing beam 280. See FIG. 19.
[0338] As was described above, the distal firing beam 280 is
operably attached to a firing member 900 that includes a tissue
cutting surface 904 on the firing member body 902. In alternative
arrangements, the tissue cutting surface may be attached to or
otherwise formed on or directly supported by a portion of the
distal firing beam 280. In the illustrated arrangement, a laterally
extending foot 905 is formed on the bottom of the firing member
body 902. The firing member body 902 further includes a wedge sled
engagement member 906 that is configured to engage a wedge sled in
the surgical staple cartridge 304 as will be discussed in further
detail below.
[0339] FIG. 18 illustrates an "unspent" or "unfired" surgical
staple cartridge 304 that has been properly installed in the
elongate channel 302. As can be seen in that Figure, the wedge sled
910 is located in an "unfired" (proximal-most) position in the
surgical staple cartridge 304. The wedge sled 910 includes a
proximally-facing sloping surface 914 that is configured to engage
the wedge sled engagement member 906 on the firing member 900 to
thereby bias the firing member 900 in an upward direction
represented by arrow 988 such that the bottom portion and foot 905
of the firing member 900 are free to clear a lock wall 307 formed
by a lock opening 303 in the bottom of the elongate channel 302.
When in that position, the distal firing beam 280 and the firing
member 900 may be distally advanced within the elongate channel 302
and, more precisely, the surgical staple cartridge 304 mounted
therein from the starting position illustrated in FIG. 18 to the
ending position with the surgical staple cartridge 304 wherein the
wedge sled 910 has ejected all of the surgical staples that were
operably supported in the surgical staple cartridge 304. In such
arrangements, after the firing member 900 has been completely fired
(i.e., completely advanced from its starting position to is ending
position within the surgical staple cartridge 304), the firing
member 900 is retracted back to the starting position shown in FIG.
19. Because the wedge sled 910 has been distally advanced to the
ending position in the staple cartridge 304 by the firing member
900 and the firing member 900 is not attached to the wedge sled
910, when the firing member 900 is retracted back to the starting
position, the wedge sled 910 remains in the ending position within
the surgical staple cartridge 304 and does not return with the
firing member 900 back to the starting position. Thus, the surgical
staple cartridge 304 is said to be in a "used", "spent" or "fired"
condition. As can be seen in FIG. 19, when no wedge sled is present
in an unfired state, the bottom of the body portion 902 as well as
the foot 905 of the firing member 900 extends into the lock opening
303 in the bottom of the elongate channel 302 due to the biasing
motion applied by the locking band 986 of the biasing member 984 to
locking cam 281 on the distal firing beam 280. When in that
position, if the clinician were to unwittingly attempt to refire
the spent surgical staple cartridge, the body portion 902 and/or
the foot 905 would contact the wall 307 in the elongate channel 302
and would be prevented from moving from the starting position to
the ending position. Thus, the firing beam locking assembly 980
prevents the advancement of the distal firing beam 280 as well as
the firing member 900 from the starting position to the ending
position unless an unfired or unspent surgical staple cartridge has
been properly/operably installed in the elongate channel of the
surgical end effector. It will also be appreciated that the firing
beam locking assembly 980 also prevents advancement of the distal
firing beam 280 when no staple cartridge at all has been installed
in the elongate channel 302. In addition to accommodating
articulation of the surgical end effector 300 about the
articulation axis B-B without applying additional load to the
distal firing beam which could result in the need for increased
articulation forces to articulate the surgical end effector, the
firing beam locking assembly 980 applies no additional load on the
firing member and/or the distal firing beam once it has been
distally advanced past the lockout wall whether or not the end
effector jaws are open or closed.
[0340] FIG. 20A illustrates another articulatable surgical end
effector embodiment 300' that employs a firing beam locking
assembly 980' that comprises a biasing member 984' that is mounted
within the end effector closure sleeve 272. As can be seen in that
Figure, for example, the biasing member 984' applies a biasing
force to a sloped or tapered portion 283' of the distal firing beam
280'. The firing beam locking assembly 980' otherwise operates in
the same manner as described above with respect to the firing beam
locking assembly 980. More specifically, the biasing member 984'
applies a biasing force to the distal firing beam 280' that forces
the distal firing beam 280' and the firing member attached thereto
downward within the elongate channel. Unless an unspent surgical
staple cartridge with a wedge sled or other staple ejector member
in an unfired position has been properly installed within the
elongate channel or cartridge support member so as to operably
engage with the firing member or firing beam to move the firing
member/firing beam out of engagement with the lock wall, the firing
member/firing beam would be prevented from being axially advanced
from the starting to ending position.
[0341] FIGS. 21-25 illustrate a portion of another elongate shaft
assembly 1200 that is similar to the elongate shaft assembly 200
described above, except for various differences discussed in
further detail below. Those components of the elongate shaft
assembly 1200 that have been discussed in detail above are
referenced with like element numbers and, for the sake of brevity,
will not be further discussed in great detail beyond that which may
be necessary to understand the operation of shaft assembly 1200
when, for example, employed with portions of the surgical
instrument 10 as described above. As can be seen in FIG. 21, the
elongate shaft assembly 1200 includes an articulation lock 1810
that is substantially similar to articulation lock 810 and operates
in essentially the same manner. As can be seen in FIG. 22, the
elongate shaft assembly 1200 includes a shaft frame 1812 that has a
proximal cavity 1815 that is configured to movably support a
proximal portion 1821 of a first distal articulation driver 1820
therein. The first distal articulation driver 1820 is movably
supported within the elongate shaft assembly 1200 for selective
longitudinal travel in a distal direction DD and a proximal
direction PD in response to articulation control motions applied
thereto. The shaft frame 1812 further includes a distal end portion
1814 that has a pivot pin 1818 formed thereon. The pivot pin 1818
is adapted to be pivotally received within a pivot hole (not shown)
in a proximal end portion 1320 of an elongate channel 1302 of a
surgical end effector 1300. Such arrangement facilitates pivotal
travel (i.e., articulation) of the elongate channel 1302 of the
surgical end effector 1300 elative to the shaft frame 1812 about an
articulation axis B-B defined by the pivot hole and the pin 1818.
The shaft frame 1812 further includes a centrally disposed cavity
1817 and a distal notch 1819 that is located between the distal end
1814 and the centrally disposed cavity 1817.
[0342] The shaft assembly 1200 further includes a second distal
articulation driver 1860 that comprises an endless member 1862 that
is rotatably journaled on a proximal pulley 1840 and a distal
pulley 1340. Still referring to FIG. 22, the proximal pulley 1840
is rotatably journaled on a pulley spindle 1842 that is mounted
within the centrally disposed cavity 1817 within the shaft frame
1812. The distal pulley 1340 is non-rotatably supported or formed
on the proximal end 1320 of the elongate channel 1302 of the
surgical end effector 1300. In one form, the endless member 1862
comprises a cable that is fabricated from stainless steel,
tungsten, aluminum, or titanium, etc., for example. The cable may
be of braided or multi-stranded construction with various numbers
of strands to attain desired levels of tensile strength and
flexibility. In various arrangements, for example, the cable 2382
may have a diameter in the range of 0.03 inches to 0.08 inches and
more preferably in the range of 0.05-0.08 inches. A preferred cable
may, for example, be fabricated from 300 series stainless
steel--half hard to full hard. In various arrangements, the cable
may also be coated with, for example, Teflon.RTM., copper, etc. for
improved lubricity and/or to reduce stretching, for example. A
first lug 1863 is attached to one end of the cable and a second lug
1864 is attached to the other end of the cable by, for example,
crimping. The cable is stretched in tension while the ends and/or
the lugs 1863, 1864 are welded, glued, mechanically fastened, etc.
together to form the endless member 1862. The spindle 1842 may
comprise a cam mount that engages the proximal pulley 1840 so as to
move the pulley 1840 proximally. Other forms of tensioning
arrangements such as belt tensioners, turnbuckle arrangements, etc.
may also be employed to tension the endless member 1862.
[0343] Still referring to FIG. 22, the endless member 1862 is
coupled to a distal end 1821 of the first distal articulation
driver 1820 by a coupler assembly 1830. The coupler assembly 1830
comprises an upper coupler portion 1832 formed on the distal end
1822 of the first distal articulation driver 1820 and a lower
coupler portion 1834. The lower coupler portion 1834 is formed with
two cradles 1835 that are configured to receive the lugs 1862, 1864
therein. A pair of attachment pins 1836 is configured to be pressed
into holes 1837 in the upper coupler portion 1832 to affix the two
coupler portions 1832 and 1834 together. Other fastener
arrangements, screws, rivets, adhesive, etc. may be employed. When
the endless member 1862 is journaled on the pulleys 1840 and 1340,
the coupler assembly 1830 is free to move axially within the distal
notch 1819 in the shaft frame 1812 in response to the axial
movement of the first distal articulation driver 1820. The
articulation motions generated by the axial movement of the first
distal articulation driver 1820 are transferred to the second
distal articulation driver 1860 or the endless member 1862. An
attachment ball or lug 1866 is attached to the endless member 1862
and is received in a groove or pocket 1342 formed in the distal
pulley 1340. Thus, movement of the endless member 1862 is
transferred to the surgical end effector 1300 and more specifically
to the elongate channel 1302 of the surgical end effector 1300 to
articulate the end effector about articulation axis B-B. Thus, when
the first distal articulation driver 1820 is moved in the distal
direction DD, the endless member 1862 causes the surgical end
effector 1300 to articulate about the articulation axis B-B in the
articulation direction represented by arrow 823. See FIG. 21.
Likewise, when the first distal articulation driver 1820 is moved
in the proximal direction PD, the endless member 1862 causes the
surgical end effector 1300 to articulate about the articulation
axis B-B in the articulation direction represented by arrow 821.
See FIGS. 21 and 25. As shown in FIG. 21, articulation direction
823 is opposite to articulation direction 821.
[0344] FIGS. 26-31 illustrate portions of another elongate shaft
assembly 2200 that is similar to the elongate shaft assembly 200
described above, except for various differences discussed in
further detail below. Those components of the elongate shaft
assembly 2200 that have been discussed in detail above are
referenced with like element numbers and, for the sake of brevity,
will not be further discussed in great detail beyond that which may
be necessary to understand the operation of the elongate shaft
assembly 2200 when, for example, employed with portions of the
surgical instrument 10 as described above. As can be seen in FIG.
26, the elongate shaft assembly 2200 includes a proximal housing or
nozzle 201 comprised of nozzle portions 202 and 203. The elongate
shaft assembly 2200 further includes an anvil actuator member in
the form of a closure sleeve 2260 which can be utilized to close
and/or open the anvil 2310 of the surgical end effector 2300 that
is operably attached thereto. As can be seen in FIG. 26, the
elongate shaft assembly 2200 includes a proximal spine 2210 which
is configured to operably interface with an articulation lock 2350.
The proximal spine 2210 is configured to, one, slidably support a
firing member 2220 therein and, two, slidably support the closure
sleeve 2260 which extends around the proximal spine 2210. The
proximal spine 2210 also slidably supports a proximal articulation
driver 2230. The proximal articulation driver 2230 has a distal end
2231 that is configured to operably engage the articulation lock
2350.
[0345] In the illustrated arrangement, the proximal spine 2210
comprises a proximal end 2211 which is rotatably supported in a
chassis 240. In one arrangement, for example, the proximal end 2211
of the proximal spine 2210 has a thread 2214 formed thereon for
threaded attachment to a spine bearing configured to be supported
within the chassis 240. Such an arrangement facilitates rotatable
attachment of the proximal spine 2210 to the chassis 240 such that
the proximal spine 2210 may be selectively rotated about a shaft
axis SA-SA relative to the chassis 240. The proximal end of the
closure sleeve 2260 is attached to a closure shuttle supported in
the chassis as was described in detail above. When the elongate
shaft assembly 2200 is operably coupled to the handle or housing of
the surgical instrument 10, operation of the closure trigger
distally advances the closure sleeve 2260.
[0346] As was also indicated above, the elongate shaft assembly
2200 further includes a firing member 2220 that is supported for
axial travel within the proximal spine 2210. The firing member 2220
includes an intermediate firing shaft portion 2222 that is
configured for attachment to a distal cutting or firing beam
assembly 2280. See FIG. 27. The intermediate firing shaft portion
2222 may include a longitudinal slot 2223 in the distal end thereof
which can be configured to receive a tab on the proximal end of the
distal firing beam assembly 2280. The longitudinal slot 2223 and
the proximal end of the distal firing beam assembly 2280 can be
sized and configured to permit relative movement therebetween and
can comprise a slip joint. The slip joint can permit the
intermediate firing shaft portion 2222 of the firing drive 2220 to
be moved to articulate the end effector 300 without moving, or at
least substantially moving, the distal firing beam assembly 2280.
Once the surgical end effector 2300 has been suitably oriented, the
intermediate firing shaft portion 2222 can be advanced distally
until a proximal sidewall of the longitudinal slot 2223 comes into
contact with the tab in order to advance the distal firing beam
assembly 2280 and fire a staple cartridge that may be supported in
the end effector 300. The proximal spine 2210 is also coupled to a
distal spine 2212.
[0347] Similar to the elongate shaft assembly 200, the illustrated
elongate shaft assembly 2200 includes a clutch assembly 2400 which
can be configured to selectively and releasably couple the proximal
articulation driver 2230 to the firing member 2220. In one form,
the clutch assembly 2400 includes a lock collar, or sleeve 2402,
positioned around the firing member 2220 wherein the lock sleeve
2402 can be rotated between an engaged position in which the lock
sleeve 2402 couples the proximal articulation driver 2230 to the
firing member 2220 and a disengaged position in which the proximal
articulation driver 2230 is not operably coupled to the firing
member 2220. When the lock sleeve 2402 is in its engaged position,
distal movement of the firing member 2220 can move the proximal
articulation driver 2230 distally and, correspondingly, proximal
movement of the firing member 2220 can move the proximal
articulation driver 2230 proximally. When lock sleeve 2402 is in
its disengaged position, movement of the firing member 2220 is not
transmitted to the proximal articulation driver 2230 and, as a
result, the firing member 2220 can move independently of the
proximal articulation driver 2230. In various circumstances, the
proximal articulation driver 2230 can be held in position by the
articulation lock 2350 when the proximal articulation driver 2230
is not being moved in the proximal or distal directions by the
firing member 2220.
[0348] As discussed above, the lock sleeve 2402 can comprise a
cylindrical, or at least a substantially cylindrical body including
a longitudinal aperture 2403 defined therein configured to receive
the firing member 2220. The lock sleeve 2402 can comprise
diametrically-opposed, inwardly-facing lock protrusions 2404 and an
outwardly-facing lock member 2406. The lock protrusions 2404 can be
configured to be selectively engaged with the firing member 2220.
More particularly, when the lock sleeve 2402 is in its engaged
position, the lock protrusions 2404 are positioned within a drive
notch 2224 defined in the firing member 2220 such that a distal
pushing force and/or a proximal pulling force can be transmitted
from the firing member 2220 to the lock sleeve 2402. When the lock
sleeve 2402 is in its engaged position, the second lock member 2406
is received within a drive notch 2232 defined in the articulation
driver 2230 such that the distal pushing force and/or the proximal
pulling force applied to the lock sleeve 2402 can be transmitted to
the proximal articulation driver 2230. In effect, the firing member
2220, the lock sleeve 2402, and the proximal articulation driver
2230 will move together when the lock sleeve 2402 is in its engaged
position. On the other hand, when the lock sleeve 2402 is in its
disengaged position, the lock protrusions 2404 may not be
positioned within the drive notch 2224 of the firing member 2220
and, as a result, a distal pushing force and/or a proximal pulling
force may not be transmitted from the firing member 2220 to the
lock sleeve 2402. Correspondingly, the distal pushing force and/or
the proximal pulling force may not be transmitted to the proximal
articulation driver 2230. In such circumstances, the firing member
2220 can be slid proximally and/or distally relative to the lock
sleeve 2402 and the proximal articulation driver 2230.
[0349] As was also discussed above, the elongate shaft assembly
2200 further includes a switch drum 2500 that is rotatably received
on the closure sleeve 2260. The switch drum 2500 comprises a hollow
shaft segment 2502 that has a shaft boss 2504 formed thereon for
receive an outwardly protruding actuation pin 2410 therein. In
various circumstances, the actuation pin 2410 extends through a
slot into a longitudinal slot provided in the lock sleeve 2402 to
facilitate axial movement of the lock sleeve 2402 when it is
engaged with the articulation driver 2230. A rotary torsion spring
2420 is configured to engage the boss 2504 on the switch drum 2500
and a portion of the nozzle housing 203 to apply a biasing force to
the switch drum 2500. The switch drum 2500 can further comprise at
least partially circumferential openings 2506 defined therein which
can be configured to receive circumferential mounts extending from
the nozzle halves 202, 203 and permit relative rotation, but not
translation, between the switch drum 2500 and the proximal nozzle
201. As described above, rotation of the switch drum 2500 will
ultimately result in the rotation of an actuation pin 2410 and the
lock sleeve 2402 between its engaged and disengaged positions.
Thus, in essence, the nozzle 201 may be employed to operably engage
and disengage the articulation drive system with the firing drive
system in the various manners described above as well as in U.S.
patent application Ser. No. 13/803,086, now U.S. Patent Application
Publication No. 2014/0263541.
[0350] Referring to FIG. 27, the closure sleeve assembly 2260
includes a double pivot closure sleeve assembly 2271. According to
various forms, the double pivot closure sleeve assembly 2271
includes an end effector closure sleeve 2272 having upper and lower
distally projecting tangs. An upper double pivot link 2277 includes
upwardly projecting distal and proximal pivot pins that engage
respectively an upper distal pin hole in the upper proximally
projecting tang and an upper proximal pin hole in an upper distally
projecting tang on the closure sleeve 2260. A lower double pivot
link 2278 includes upwardly projecting distal and proximal pivot
pins that engage respectively a lower distal pin hole in the lower
proximally projecting tang and a lower proximal pin hole in the
lower distally projecting tang.
[0351] The elongate shaft assembly 2200 also includes a surgical
end effector 2300 that is similar to the surgical end effector 300
that was described above. As can be seen in FIG. 27, the surgical
end effector 2300 includes an elongate channel 2302 that is
configured to operably support a surgical staple cartridge 2304
therein. The elongate channel 2302 has a proximal end portion 2320
that includes two upstanding lateral walls 2322. The surgical end
effector 2300 further includes an anvil 2310 that has an anvil body
2312 that has a staple-forming undersurface 2313 formed thereon.
The proximal end 2314 of the anvil body 2312 is bifurcated by a
firing member slot 2315 to form two anvil attachment arms 2316.
Each anvil attachment arm 2316 includes a laterally protruding
anvil trunnion 2317. A trunnion slot 2324 is provided in each
lateral wall 2322 of the elongate channel 2302 for receiving a
corresponding one of the anvil trunnions 2317 therein. Such
arrangement serves to movably affix the anvil 2310 to the elongate
channel 2302 for selective pivotable travel between open and closed
or clamped positions. The anvil 2310 is moved to a closed position
by distally advancing the closure sleeve 2260 and more
particularly, the end effector closure sleeve 2272 up the tapered
attachment arms 2316 which causes the anvil 2310 to move distally
while pivoting to the closed position. A horseshoe-shaped opening
2273 is provided in the end effector closure sleeve 2272 that is
configured to engage an upstanding tab 2318 on the anvil 2310 of
the end effector 2300. To open the anvil 2310, the closure sleeve
2260 and, more particularly, the end effector closure sleeve 2272
is moved in the proximal direction. In doing so, a central tab
portion defined by the horseshoe shaped opening 2273 cooperates
with the tab 2318 on the anvil 2310 to pivot the anvil 2310 back to
an open position.
[0352] Turning to FIGS. 26, 28 and 29, as mentioned above, the
elongate shaft assembly 2200 includes an articulation lock 2350
that is substantially similar to articulation locks 350 and 810
that were described above. Those components of articulation lock
2350 that differ from the components of articulation lock 350 and
are necessary to understand the operation of articulation lock 350
will be discussed in further detail below. As discussed above, the
articulation lock 2350 can be configured and operated to
selectively lock the end effector 2300 in position. Such
arrangement enables the surgical end effector 2300 to be rotated,
or articulated, relative to the shaft closure sleeve 2260 when the
articulation lock 2350 is in its unlocked state. When the proximal
articulation driver 2230 is operatively engaged with the firing
member 2220 via the clutch system 2400, further to the above, the
firing member 2220 can move the proximal articulation driver 2230
proximally and/or distally. Movement of the proximal articulation
driver 2230, whether it is proximal or distal, can unlock the
articulation lock 2350 as was described above. This embodiment
includes a proximal lock adapter member 2360 that is movably
supported between the proximal spine 2210 and the distal spine
2212. The proximal lock adapter 2360 includes a lock cavity 2362
for receiving therein first lock elements 2364 and second lock
elements 2366 that are journaled on a frame rail 2368 that extends
between the proximal frame 2210 and the distal frame 2212. The
articulation lock 2350 operates in the various manners described
above and, for the sake of brevity, will not be further discussed
herein.
[0353] As can be seen in FIGS. 26, 28 and 29, a first distal
articulation driver 2370 is attached to the proximal lock adapter
2360. The first distal articulation driver 2370 is operably
attached to a second distal articulation driver 2380 that operably
interfaces with the elongate channel 2302 of the end effector 2300.
The second distal articulation driver 2380 comprises a cable 2382
that is rotatably journaled on a proximal pulley 2383 and a distal
pulley 2392. The distal pulley 2392 is non-rotatably supported or
integrally formed on an end effector mounting assembly 2390 and
includes a detent or pocket 2396. In the illustrated example, the
end effector mounting assembly 2390 is non-movably attached to the
proximal end 2320 of the elongate channel 2302 by a spring pin 2393
that extends through a hole in the end effector mounting assembly
2390 and holes 2394 in the proximal end 2320 of the elongate
channel 2302. The proximal pulley 2383 is rotatably supported on
the distal spine 2212. The distal end of the distal spine 2212 has
a pivot pin 2213 formed thereon that is configured to be rotatably
received within a pivot hole 2395 formed in the end effector
mounting member 2390. Such arrangement facilitates pivotal travel
(i.e., articulation) of the elongate channel 2302 relative to the
distal spine 2212 about an articulation axis B-B defined by the
pivot hole 2395 and the pin 2213.
[0354] In one form, the cable 2382 may be fabricated from stainless
steel, tungsten, aluminum, titanium, etc., for example. The cable
may be of braided or multi-stranded construction with various
numbers of strands to attain desired levels of tensile strength and
flexibility. In various arrangements, for example, the cable 2382
may have a diameter in the range of 0.03 inches to 0.08 inches and
more preferably in the range of 0.05-0.08 inches. A preferred cable
may, for example, be fabricated from 300 series stainless
steel--half hard to full hard. In various arrangements, the cable
may also be coated with, for example, Teflon.RTM., copper, etc. for
improved lubricity and/or to reduce stretching, for example. In the
illustrated example, the cable 2382 has a lug 2384 attached to one
end thereof and a lug 2385 attached to the other end thereof by,
for example, crimping. The first distal articulation driver 2370
includes a pair of spaced cleats 2372, 2374 that are spaced from
each other sufficiently so as to accommodate the lugs 2384, 2385
therebetween. For example, the proximal cleat 2372 includes a
proximal slot 2373 for receiving a portion of the cable 2382
adjacent the lug 2384 and the distal cleat 2374 includes a distal
slot 2375 for receiving a corresponding portion of the cable 2382
adjacent the lug 2385. The slots 2373 and 2375 are sized relative
to the lugs 2384, 2385, respectively so as to prevent the lugs
2384, 2385 from pulling therethrough. The proximal slot 2375 is
oriented at an angle as compared to the distal slot 2375 so as to
cinchingly grip the corresponding portion of the cable 2382
therein. See FIG. 30. An attachment ball or lug 2398 is attached to
the endless member 2382 and is received in the detent or pocket
2396 formed in the distal pulley 2392. See FIG. 31. Thus, when the
first distal articulation driver 2370 is axially retracted in the
proximal direction PD, in the manners described above, the endless
member 2382 will articulate the end effector 2300 in the direction
represented by arrow 2376 in FIG. 31. Conversely, when the first
distal articulation driver 2370 is axially advanced in the distal
direction DD, the surgical end effector 2300 is articulated in the
direction represented by arrow 2399 in FIG. 31. In addition, the
proximal and distal cleats 2372, 2374 are spaced sufficiently so as
to accommodate the lugs 2384, 2385 therebetween. A tensioning wedge
2378 is used as shown in FIGS. 29-32 to apply sufficient tension to
the cable 2382 such that when the cable is actuated, it will apply
an articulation motion to the end effector 2300. In the alternative
arrangement depicted in FIG. 35, the proximal cleat 2374' is
initially not attached to the first articulation driver 2370. The
proximal cleat 2374' is positioned on the first distal articulation
driver 2370 so as to capture the lugs 2384 and 2385 between the
distal cleat 2372 and the proximal cleat 2374'. The proximal cleat
2374' is moved toward the distal cleat 2372 until a sufficient
amount of tension is generated in the cable 2382 and then the
proximal cleat 2374' is attached to the first distal articulation
driver 2370. For example, the proximal cleat 2374' may be attached
to the first distal articulation driver 2370 by laser welding or
other suitable form of attachment means or fastener
arrangement.
[0355] Referring FIGS. 36-39, the surgical instrument includes for
example, a central firing beam support member 2286 that is
configured to extend across an articulation joint to provide
support to a flexible firing beam assembly 2280. In one form, the
central firing beam support member 2286 comprises a flexible plate
member or band and includes a downwardly protruding distal
attachment tab 2287 that is attached to the surgical end effector
and an upwardly extending proximal end portion 2288 that is
attached to the elongate shaft assembly. In at least one
arrangement, the distal attachment tab 2287 is attached to the end
effector mounting assembly 2390 by the spring pin 2393 and the
proximal end portion 2288 is pinned to the distal spine 2212 by
pins (not shown). The central firing beam support member 2286 is
located along the centerline or shaft axis of the device and serves
to provide support to the firing beam during articulation. This is
different from those arrangements that employ "blow-out" plates or
lateral support plates that are located on the lateral sides of the
firing beam and which are thereby offset from the shaft axis
increasing the tension and compression forces that they experience
during articulation. In the illustrated example, the longitudinally
movable flexible firing beam assembly 2280 comprises a laminated
beam structure that includes at least two beam layers wherein at
least one beam layer is configured to pass adjacent one lateral
side of the central firing beam support member and at least one
other beam member is configured to pass adjacent another lateral
side of the central firing beam support member. In the illustrated
example, two laminated layers 2282 and 2284 are configured to pass
adjacent each side of the flexible tension carrying member. See,
for example, FIGS. 35 and 36. In various embodiments, the laminated
layers 2282 and 2284 may comprise, for example, stainless steel
bands that are interconnected by, for example, welding or pinning
together at their proximal ends, while their respective distal ends
are not connected together to allow the laminates or bands to splay
relative to each other when the end effector is articulated. Each
pair of laminated layers or bands 2282, 2284 is represented as a
lateral firing band assembly 2285 of the firing beam assembly 2280.
Thus, as shown in FIG. 36, one lateral firing band assembly 2285 is
supported on each lateral side of the central articulation bar 2286
for axial travel relative thereto by a series of lateral load
carrying members 2290. Each lateral load carrying member 2290 may
be fabricated from, for example, stainless steel, aluminum,
titanium, liquid crystal polymer material, plastic material, Nylon,
Acrylonitrile butadiene styrene (ABS), polyethylene, etc. and be
formed with opposed arcuate ends 2292. Each lateral load carrying
member 2290 also has an axial passage 2294 extending therethrough
to receive the assembly of the lateral firing band assemblies 2285
and the central articulation bar 2286. As can be most particularly
seen in FIG. 38, each axial passage is defined by two opposed
arcuate surfaces 2295 that facilitate movement of lateral load
carrying members 290 on the longitudinally movable flexible firing
beam assembly 2280. The lateral load carrying members 2290 are
serially arranged on the lateral firing band assemblies 2285 and
the central articulation bar 2286 such that the opposed arcuate
ends 2292 abut corresponding arcuate ends 2292 of adjacent lateral
load carrying members 2290. See, for example, FIGS. 36 and 37.
[0356] Referring again to FIG. 37, it can be seen that the proximal
end portion 2288 of the central articulation bar 2286 extends
downwardly for attachment to the distal spine 2212. The distal end
2287 of the firing beam assembly 2280 is attached to a firing
member 2900 of the type and construction describe above, for
example. As can be seen in that Figure, the firing member 2900
includes a vertically-extending firing member body 2902 that has a
tissue cutting surface or blade 2904 thereon. In addition, a wedge
sled 2910 may be mounted within the surgical staple cartridge 2304
for driving contact with the firing member 2900. As the firing
member 2900 is driven distally through the cartridge body 2304, the
wedge surfaces 2912 of the wedge sled 2910 contact the staple
drivers to actuate the drivers and the surgical staples supported
thereon upwardly in the cartridge 2304. The firing beam assembly
2280 is operated in the various manners described above. As the
firing beam assembly 2280 is distally advanced about the
articulation joint, the lateral load carrying members 2290 may help
to resist buckling loads on the firing beam assembly 2280. The
lateral load carrying members 2290 may also reduce the amount of
force required to articulate the end effector and also accommodate
greater articulation angles when compared to other articulation
joint arrangements. The fixed central firing beam support member
2286 serves to carry the tension loads that are generated during
articulation and firing.
[0357] As described above, the firing beam assembly comprises a
laminated beam structure that includes at least two beam layers. As
the firing beam assembly is advanced distally (during firing), the
firing beam assembly is essentially bifurcated by the central
firing beam support member so that portions of the firing beam
assembly (i.e., laminate layers) pass on both sides of the of the
central firing beam support member.
[0358] FIGS. 40-43 illustrate a portion of another firing beam
assembly 2280' that is attached to a firing member 2900. As can be
seen in those Figures, the firing beam assembly 2280' comprises a
laminated structure that includes two outer lateral beams or layers
2282' that each have a thickness that is designated as "a" and four
central layers 2284' that each have a thickness designated as "b".
In at least one arrangement, for example, "a" may be approximately
0.005-0.008 inches and more preferably 0.008 inches and "b" may be
approximately 0.008-0.012 inches and more preferably 0.010 inches.
However, other thicknesses may be employed. In the illustrated
example, "a" is less than "b". In other arrangements, "a" is
greater than "b". In alternative arrangements, for example, the
laminates may be made up of three different thicknesses "a", "b",
"c", wherein "a"=0.006 inches, "b"=0.008 inches, and "c"=0.010
inches (with the thickest laminate or band being in the center of
the assembly). In various arrangements, there may be an odd number
of laminates or bands where "c" is the single thickest laminate in
the center.
[0359] The laminate composition is relevant because of the amount
of strain that is applied to a beam assembly based on its thickness
and its distance from the centerline of bending. Thicker laminates
or bands that are closer to the centerline may experience the same
levels of strain as the thinner ones that are farther away from the
centerline because they have to be bent more in view of the fact
that they are stacked together. The radius of curvature is more
aggressive on the inside of the curve the father away from the
centerline. Thicker laminates or bands tend to experience more
internal stress than thinner laminates given the same radius of
curvature. Thus, thinner side laminates or bands that have the
smallest radius of curvature may have the same likelihood of
plastically deforming as the thicker ones that are closure to the
centerline. Stated another way, when the end effector articulates
in one direction, the laminates or bands located away from the
direction of articulation have the largest bend radius and the
laminates or bands closest to the direction of articulation have
the tightest bend radius. However, when the end effector is
articulated in the opposite direction, the inverse is true. The
laminates on the inside of the laminate stack experience the same
deviation, but their bend radius will always fall within the range
of the outer ones. Thus, to maintain flexibility, locating thinner
laminates on the outside of the stack may be desired. However, to
maximize stiffness and buckling resistance, thicker materials on
the inside add additional benefit. Alternately, if the end effector
needs only to articulate in a single direction, the laminates or
bands located away from the direction of articulation will
experience the greatest bend radius and the laminates or bands
located in the direction of articulation have the tightest bend
radius. However, because the end effector does not articulate in an
opposite direction, the inverse is no longer true and therefor, the
laminate stack does not need to be symmetric. Thus, in such
arrangement, it would be desirable to have the thinnest laminate or
band be the one that will experience the tightest bend radius (the
laminate or band on the side of the direction of articulation).
[0360] In still other arrangements, the laminates or bands may be
fabricated from different metals with different strengths and
modulus. For example, the outer laminates or bands could have the
same thickness as the inner laminates or bands with the inner
laminates or bands being fabricated from 300 series stainless steel
and the outer laminates or bands being fabricated from titanium or
nitinol.
[0361] As can also be seen in FIGS. 42 and 43, the distal firing
beam assembly 2280' may be effectively employed with the series of
lateral load carrying members 2290 described above. It will be
appreciated that the distal firing beam assembly 2280' may also be
used in connection with a central articulation bar 2286 in the
manner described above so that some of the layers or lateral beams
(or bands or laminates) thereof axially advance along the sides of
the central articulation bar. In some embodiments, the layers
advancing on each side of the central articulation bar 2286 may
have the same thickness, composition, shape and configuration. In
other arrangements the layer or layers passing along one side of
the central articulation bar may have a different thickness and/or
composition and/or shape than the thickness and/or composition
and/or shape of the layer or layers passing along the opposite side
of the central articulation bar, so as to achieve a desired range
of travel and flexibility while maintaining a desired amount of
stiffness so as to avoid buckling during firing.
[0362] FIGS. 44-46 illustrate a portion of another elongate shaft
assembly 3200 that includes a surgical end effector 300 of the type
and construction described above. Other forms of surgical end
effectors may also be employed. The elongate shaft assembly 3200
also includes a longitudinally movable flexible firing beam
assembly 3280 that is attached to a firing member 900. In
alternative arrangements, the distal end of the firing beam
assembly 3280 may be configured to perform various actions within
the surgical end effector without the need for a firing member
attached thereto. The flexible firing beam assembly 3280 may
comprise a laminated beam arrangement of the various types
described herein. In one arrangement, at least two compression
bands are employed to provide lateral support to the flexible
firing beam assembly 3280 as it traverses the articulation joint.
The illustrated embodiment employs a total of four compression
bands for providing lateral support to the flexible firing beam as
it traverses the articulation joint. For example, the elongate
shaft assembly 3200 further includes a spine 3210 that includes a
distal end 3217 that has two distal cavities, or notches 3219, and
two proximal cavities, or notches 3219', formed therein. One distal
cavity 3219 accommodates a first proximal end 3904 of a first
compression band 3900 located on one lateral side 3281 of said
flexible firing beam assembly 3280 and the other distal cavity 3219
accommodates a second proximal end 3905 of a second compression
band 3901 located on another lateral side 3283 of the flexible
firing beam assembly 3280. The first compression band 3900 includes
a first distal end 3902 that is mounted within a corresponding
upstanding lateral support wall 330 formed on the proximal end 320
of the elongate channel 302 of the surgical end effector 300.
Similarly, the second compression band 3901 includes a second
distal end 3907 that is also mounted within a corresponding
upstanding lateral support wall 330 formed on the proximal end 320
of the elongate channel 302 of the surgical end effector 300. The
first and second distal compression bands 3900, 3901 may be
fabricated from spring steel or the like and the proximal ends
3904, 3905 may be folded in a U-shaped fashion to form a biasing
portion configured to be movably received within the distal notches
3219 as shown. Such arrangement permits the first and second distal
compression bands 3900, 3901 to flex in response to the
articulation of the surgical end effector 300 while retaining the
proximal ends 3904, 3905 within their corresponding distal notches
3219.
[0363] As can also be seen in FIGS. 44-46, the elongate shaft
assembly 3200 further includes a third compression band 3910 and a
fourth compression band 3911. Like the first and second compression
bands 3900, 3901, the third and fourth compression bands 3910, 3911
may be fabricated from spring steel. As can be seen in FIGS. 44-46,
the third compression band 3910 may be situated between the first
compression band 3900 and the lateral side 3281 of the flexible
firing beam assembly 3280 and the fourth compression band 3911 may
be situated between the second compression band 3901 and the other
lateral side 3283 of the flexible firing band assembly 3280. The
third proximal end 3914 of the third compression band 3910 as well
as the fourth proximal end 3915 of the fourth compression band 3911
may each be folded in a U-shaped fashion to form a biasing portion
that is movably received within a corresponding proximal cavity
3219' in the spine 3210. The third distal end 3912 of the third
compression band 3910 and the fourth distal end 3917 of the fourth
compression band 3911 are mounted in a corresponding lateral
support wall 330 in the surgical end effector 300.
[0364] The elongate shaft assembly 3200 further comprises a movable
support link assembly 3920 for providing further lateral support to
the flexible firing beam assembly 3280 as the end effector 300 is
articulated about the articulation axis. As can be seen in FIGS.
44-46, the movable support link assembly 3920 comprises a middle
support member 3922 that is movably coupled to the surgical end
effector 300 as well as the elongate shaft assembly 3200. In one
embodiment, the middle support member 3922 is pivotally pinned to
the proximal end 320 of the elongate channel 302. The middle
support member 3922 further includes a proximally protruding tab
3926 that has an elongate proximal slot 3928 therein. The proximal
slot 3928 is configured to slidably receive a middle support pin
3211 formed on the spine 3210. Such arrangement permits the
relative pivotal and axial movement between the middle support
member 3922 and the spine 3210 of the elongate shaft assembly 3200
so as to accommodate a larger range of articulation while being
able to dynamically move so as to maintain adequate lateral support
on the firing beam assembly 3280. As can be seen in FIGS. 44-46,
the middle support member 3922 further includes centrally disposed
slot 3930 for axially receiving the firing beam assembly 3280
therethrough.
[0365] As can be further seen in FIGS. 44-46, the movable support
link assembly 3920 further comprises an elongate movable pivot link
3940. The pivot link 3940 includes a central body portion 3942 that
has proximally protruding proximal nose portion 3943 and a
distally-protruding distal nose portion 3944. The pivot link 3940
further includes a first downwardly-protruding lateral support wall
3945 and a second downwardly protruding lateral support wall 3946
that define a beam slot 3947 therebetween. As can be seen in FIG.
46, the firing beam assembly 3280 is configured to extend between
the first and second lateral support walls 3945, 3946 during
actuation of the firing beam assembly 3280 and articulation of the
surgical end effector 300. Further, in the illustrated arrangement,
for example, the first compression band 3900 extends between the
first lateral support wall 3945 and the third compression band 3910
and the second compression band 3901 extends between the second
lateral support wall 3946 and the fourth compression band 3911. The
first lateral support wall 3945 includes an inwardly facing first
arcuate surface 3948 and the second lateral support wall 3946
includes an inwardly facing second arcuate surface 3949. The first
and second arcuate surfaces 3948, 3949 serve to provide lateral
support to the firing beam assembly 3280 as it flexes during
articulation of the end effector 300. The radiused surfaces may
match the outer radius of the firing beam assembly 3280 and
compression bands 3900, 3901, 3910, 3911 depending upon the
direction and degree of articulation. As can also be seen in FIGS.
44 and 45, the distal end 3217 of the spine 3210 includes a pair of
right and left opposing shaft notches 3218 into which the rounded
proximally-protruding proximal nose portion 3943 of the pivot link
3940 extends depending upon the direction in which the surgical end
effector is articulated about the articulation axis. Similarly,
right and left opposed support notches 3932 are provided in the
middle support 3922 to accommodate the distally-protruding distal
nose portion 3944 of the pivot link 3940 depending upon the
direction in which the end effector is articulated. Such notch
arrangements serve to properly align the pivot link 3940 in an
orientation suited to accommodate the direction of articulation
while affording lateral support to the pivot link 3940.
[0366] FIGS. 47-51 illustrate another elongate shaft assembly 4200
that is, in some aspects, similar to the elongate shaft assembly
2200 described above, except for various differences discussed in
further detail below. Those components of the elongate shaft
assembly 2200 that have been discussed in detail above will contain
like element numbers and, for the sake of brevity, will not be
further discussed in great detail beyond that which may be
necessary to understand the operation of elongate shaft assembly
4200 when, for example, employed with portions of the surgical
instrument 10 as described above. As can be seen in FIG. 47, in at
least one example, the elongate shaft assembly 4200 includes an
articulation lock 2350. As was discussed in detail above, the
articulation lock assembly 2350 includes a proximal lock adapter
2360 that is coupled (e.g., pinned) to a first distal articulation
driver 4370. As can be seen in FIGS. 47 and 50, the first distal
articulation driver 4370 includes a first proximal gear rack
segment 4371 and a first distal gear rack segment 4373 formed on a
distal end 4372 thereof. The elongate shaft assembly 4200 also
includes a second distal articulation driver 4380 that includes a
second proximal gear rack segment 4381 and a second distal gear
rack segment 4383 that is formed on a distal end 4382 thereof.
[0367] The first distal articulation driver 4370 and the second
distal articulation driver 4380 are configured to move axially
relative to the distal spine assembly 4212 in the proximal
direction PD and the distal direction DD. As can be seen in FIG.
50, the first proximal gear rack segment 4371 and the second
proximal gear rack segment 4381 are in meshing engagement with a
proximal power transfer gear 4390 that is rotatably supported by
the distal spine assembly 4212. Likewise, the first distal gear
rack segment 4373 and the second distal gear rack segment 4383 are
in meshing engagement with a distal power transfer gear assembly
4392. In particular, in at least one arrangement, the distal power
transfer gear assembly 4392 includes a pinion gear 4393 that is in
meshing engagement with the first distal gear rack segment 4373 and
the second distal gear rack segment 4383. The distal power transfer
gear assembly 4392 further includes a drive gear 4394 that is
arranged in meshing engagement with an idler gear 4395. The idler
gear 4395 is, in turn, supported in meshing engagement with a
driven gear 4306 that is formed on the proximal end portion 4320 of
the elongate channel 4302 of a surgical end effector 4300. The
surgical end effector 4300 may otherwise be similar to the surgical
end effector 2300 and include an anvil 4310 that may be opened and
closed in the various manners described above. Referring to FIGS.
48, 49 and 51, the distal spine assembly 4212 may comprise an upper
spine portion 4212A and a lower spine portion 4212B. The distal
power transfer gear assembly 4392, the idler gear 4395 and the
driven gear portion 4306 of the elongate channel 4302 are each
pivotally attached to or supported on the bottom portion 4212B of
the distal spine assembly 4212.
[0368] The elongate shaft assembly 4200 depicted in FIG. 47
includes a firing beam assembly 3280 that is attached to a firing
member (not shown). The firing beam assembly 3280 may comprise a
laminated beam arrangement of the types described herein. Operation
of the firing member was described in detail above and will not be
repeated for the sake of brevity. As can also be seen in FIG. 47, a
firing beam support member 4400 of the type disclosed in U.S.
patent application Ser. No. 14/575,117, entitled SURGICAL
INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND MOVABLE FIRING
BEAM SUPPORT ARRANGEMENTS, the entire disclosure of which is hereby
incorporated by reference herein, is employed to provide support to
the firing beam assembly 3280 during articulation of the surgical
end effector 4300. FIG. 52 illustrates use of a distal firing beam
assembly 2280 in an elongate shaft assembly 4200. As can be seen in
that Figure, a plurality of lateral load carrying members 2290 are
employed in the manner described above to provide support to the
distal firing beam assembly 2280 as the surgical end effector 4300
is articulated.
[0369] FIGS. 53-58 illustrate another elongate shaft assembly 5200
that is, in some aspects, similar to the elongate shaft assembly
2200 described above, except for various differences discussed in
further detail below. Those components of the elongate shaft
assembly 5200 that have been discussed in detail above with respect
to the elongate shaft assembly 2200 will be identified with like
element numbers and, for the sake of brevity, will not be further
discussed in great detail beyond that which may be necessary to
understand the operation of the elongate shaft assembly 5200 when,
for example, employed with portions of the surgical instrument 10
as described above.
[0370] Similar to the elongate shaft assembly 2200, the illustrated
elongate shaft assembly 5200 includes a clutch assembly 2400 which
is configured to operably engage an articulation system 5600 that
is configured to apply push and pulling articulation motions to the
surgical end effector 300 that is operably coupled thereto. In this
embodiment, the clutch assembly 2400 includes a lock collar, or
lock sleeve 2402, that is positioned around the firing member 2220
wherein the lock sleeve 2402 can be rotated between an engaged
position in which the lock sleeve 2402 operably engages the
articulation system 5600 to the firing member 2220 and a disengaged
position in which the articulation system 5600 is not operably
coupled to the firing member 2220. Referring specifically to FIGS.
54-56, in the illustrated example, the articulation system 5600
comprises an articulation disc or rotary member 5602 that is
supported for rotational movement within the nozzle 201. The
articulation disc 5602 is rotatably driven by a drive connection
assembly 5610. In the illustrated example, the drive connection
assembly 5610 includes a drive pin 5612 that is attached to the
articulation disc 5602. An articulation drive link 5614 is operably
attached to the drive pin 5612 by a connector 5616 that facilitates
some movement of the articulation drive link 5614 relative to the
drive pin 5612. See FIGS. 54-56. The articulation drive link 5614
includes a drive coupler 5618 that is configured to drivingly
engage the outwardly facing lock member 2406 on the lock sleeve
2402. See FIG. 53.
[0371] As discussed above, the lock sleeve 2402 can comprise a
cylindrical, or at least a substantially cylindrical body including
a longitudinal aperture 2403 defined therein configured to receive
the firing member 2220. See FIG. 53. The lock sleeve 2402 can
comprise diametrically-opposed, inwardly-facing lock protrusions
2404 and an outwardly-facing lock member 2406. The lock protrusions
2404 can be configured to be selectively engaged with the firing
member 2220. More particularly, when the lock sleeve 2402 is in its
engaged position, the lock protrusions 2404 are positioned within a
drive notch 2224 defined in the firing member 2220 such that a
distal pushing force and/or a proximal pulling force can be
transmitted from the firing member 2220 to the lock sleeve 2402.
When the lock sleeve 2402 is in its engaged position, the outwardly
facing lock member 2406 is received within a drive notch 5619 in
the drive coupler 5618 as shown in FIG. 53 such that the distal
pushing force and/or the proximal pulling force applied to the lock
sleeve 2402 can be transmitted to the articulation drive link 5614.
In effect, the firing member 2220, the lock sleeve 2402, and the
articulation drive link 5614 will move together when the lock
sleeve 2402 is in its engaged position. On the other hand, when the
lock sleeve 2402 is in its disengaged position, the lock
protrusions 2404 may not be positioned within the drive notch 2224
of the firing member 2220 and, as a result, a distal pushing force
and/or a proximal pulling force may not be transmitted from the
firing member 2220 to the lock sleeve 2402. Correspondingly, a
drive force DF may not be applied to the articulation disc 5602. In
such circumstances, the firing member 2220 can be slid proximally
and/or distally relative to the lock sleeve 2402 and the proximal
articulation driver 2230.
[0372] As was also discussed above, the elongate shaft assembly
5200 further includes a switch drum 2500 that is rotatably received
on the closure sleeve 2260. See FIG. 53. The switch drum 2500
comprises a hollow shaft segment 2502 that has a shaft boss 2504
formed thereon for receive an outwardly protruding actuation pin
2410 therein. In various circumstances, the actuation pin 2410
extends into a longitudinal slot 2401 provided in the lock sleeve
2402 to facilitate axial movement of the lock sleeve 2402 when it
is engaged with the articulation drive link 5614. A rotary torsion
spring 2420 is configured to engage the boss 2504 on the switch
drum 2500 and a portion of the nozzle housing 201 to apply a
biasing force to the switch drum 2500. As also discussed above, the
switch drum 2500 can further comprise at least partially
circumferential openings defined therein which can be configured to
receive circumferential mounts extending from the nozzle halves and
permit relative rotation, but not translation, between the switch
drum 2500 and the nozzle housing 201. As described above, rotation
of the switch drum 2500 will ultimately result in the rotation of
an actuation pin 2410 and the lock sleeve 2402 between its engaged
and disengaged positions. Thus, in essence, the nozzle housing 201
may be employed to operably engage and disengage the articulation
system 5600 with the firing drive system in the various manners
described above as well as in U.S. patent application Ser. No.
13/803,086, now U.S. Patent Application Publication No.
2014/0263541.
[0373] Referring again to FIGS. 53-56, the articulation system 5600
of the illustrated example, further includes a "first" or right
articulation linkage 5620 and a "second" or left articulation
linkage 5640. The first articulation linkage 5620 includes a first
articulation link 5622 that includes a first articulation pin 5624
that is movably received within a first articulation slot 5604 in
the articulation disc 5602. The first articulation link 5622 is
movably pinned to a first articulation connector 5626 that is
configured to engage an articulation lock 2350. As discussed above,
the articulation lock 2350 can be configured and operated to
selectively lock the surgical end effector 300 in position. Such
arrangement enables the surgical end effector 300 to be rotated, or
articulated, relative to the shaft closure sleeve 2260 when the
articulation lock 2350 is in its unlocked state. When the
articulation drive link 5614 is operably engaged with the firing
member 2220 via the clutch system 2400, further to the above, the
firing member 2220 can rotate the articulation disc 6502 to move
the first articulation linkage 5620 proximally and/or distally.
Movement of the first articulation connector 5626 of the first
articulation linkage 5620, whether it is proximal or distal, can
unlock the articulation lock 2350 as was described above. The
proximal lock adapter 2360 includes a lock cavity 2362 for
receiving therein first lock elements 2364 and second lock elements
2366 that are journaled on a frame rail that extends between the
proximal frame 2210 and the distal frame. Operation of the
articulation lock 2350 was described above and, for the sake of
brevity, will not be further discussed herein. As can be seen in
FIG. 53, a first distal articulation driver 5370 is attached to the
proximal lock adapter 2360. The first distal articulation driver
5370 is operably attached to the proximal end 320 of the elongate
channel 302 of the surgical end effector 300.
[0374] As was also indicated above, the articulation system 5600 of
the illustrated example, further includes a "second" or left
articulation linkage 5640. As can be seen in FIGS. 54-56, the
second articulation linkage 5640 includes a second articulation
link 5642 that includes a second articulation pin 5644 that is
movably received within a second articulation slot 5606 in the
articulation disc 5602. The second articulation link 5642 is pinned
to a second articulation bar 5646 that is attached to the proximal
end 320 of the elongate channel 302 of the surgical end effector
300. Referring to FIG. 54, the articulation system 5600 further
includes a first articulation biasing member 5628 that is received
within the first articulation slot 5604 and a second articulation
biasing member 5648 that is received within the second articulation
slot 5606. FIG. 54 illustrates the articulation system 5600 in a
neutral or unarticulated configuration. As can be seen in that
Figure, the first articulation pin 5624 is in contact with the
first articulation biasing member 5628 and the second articulation
pin 5644 is in contact with the second articulation biasing member
5648. However, when in that neutral position, the first and second
articulation biasing members 5628, 5648 may not be in a compressed
state. FIG. 55 illustrates application of the drive force DF to the
articulation disc 5602 in the proximal direction PD by the
articulation drive link 5614 in the above-described manner.
Application of the drive force DF in the proximal direction PD
results in rotation of the articulation disc 5602 in the rotary
direction represented by arrow 5601. As the articulation disc 5602
rotates in the rotary direction 5601, the end of the second
articulation slot contacts the second articulation pin 5644 and
applies a pushing force to the second articulation linkage 5640 and
ultimately to the second articulation bar 5646. Conversely, the
first articulation biasing member 5628 urges the first articulation
pin 5624 in the direction of arrow 5601 within the first
articulation slot 5604 such that a pulling force is applied to the
first articulation linkage 5620 in the proximal direction PD. This
proximal pulling force is transmitted to the first distal
articulation driver 5370 through the articulation lock 2350. Such
"pushing and pulling motions" as applied to the surgical end
effector causes the surgical end effector 300 to articulate about
the articulation axis in the direction represented by arrow 5300.
See FIG. 53. When the articulation disc 5602 is in the position
illustrated in FIG. 55, the second articulation biasing member 5648
may be in a compressed state and the first articulation biasing
member may not be compressed. Thus, when the application of drive
force DF to the articulation drive link 5614 is discontinued, the
second articulation biasing member 5648 may bias the articulation
disc 5602 back to the neutral position shown in FIG. 54, for
example.
[0375] Conversely, when the drive force DF is applied to the
articulation drive link 5614 in the distal direction DD as shown in
FIG. 56, the articulation disc 5602 rotates in the rotary direction
represented by arrow 5603. As the articulation disc 5602 rotates in
the rotary direction 5603, the end of the first articulation slot
5604 contacts the first articulation pin 5624 and applies a pushing
force to the first articulation linkage 5620 and ultimately to the
first distal articulation driver 5370 through the articulation lock
2350. In addition, the second articulation biasing member 5648
urges the second articulation pin 5644 in the direction of arrow
5603 within the second articulation slot 5606 such that a pulling
force is applied to the second articulation linkage 5640 in the
proximal direction PD. This proximal pulling force is transmitted
to the second articulation bar 5646. Such "pushing and pulling
motions" as applied to the surgical end effector 300 causes the
surgical end effector 300 to articulate about the articulation axis
in the direction represented by arrow 5302. See FIG. 53. When the
articulation disc 5602 is in the position illustrated in FIG. 56,
the first articulation biasing member 5628 may be in a compressed
state and the second articulation biasing member 5648 may not be
compressed. Thus, when the application of drive force DF to the
articulation drive link 5614 is discontinued, the first
articulation biasing member 5628 may bias the articulation disc
5602 back to the neutral position shown in FIG. 54, for
example.
[0376] FIG. 57 illustrates the attachment of the distal end portion
814 of the shaft frame 812 to the surgical end effector 300 that is
operably coupled to the elongate shaft assembly 5200. As described
above, the distal end portion 814 has a downwardly protruding pivot
pin (not shown) thereon that is adapted to be pivotally received
within a pivot hole (not shown) that is formed in the proximal end
portion 320 of the elongate channel 302. Such arrangement
facilitates pivotal travel of the elongate channel 302 relative to
the shaft frame 812 about an articulation axis B-B defined by the
pivot hole. As can also be seen in FIG. 57, the first distal
articulation driver 5370 is attached to a first coupler 850 by a
first ball joint 852. The first coupler 850 is also pivotally
pinned to the proximal end portion 320 of the elongate channel 302
by a first pin 854 as can be seen in FIG. 57. Similarly, the second
articulation bar 5646 is attached to a second coupler 870 by a
second ball joint 872. The second coupler 870 is also pivotally
pinned to the proximal end portion 320 of the elongate channel 302
by a second pin 874 as can be seen in FIG. 57.
[0377] Referring to FIGS. 53 and 58, the elongate shaft assembly
5200 may also include a firing beam assembly 2280 that is attached
to a firing member 900 of the type described above. The firing beam
assembly 2280 is attached to the firing member 2220 and may be
axially advanced and retracted in the various manners described
above. The elongate shaft assembly 5200 may further comprise a
multiple support link assembly 920 for providing lateral support to
the distal firing beam 2280 as the surgical end effector 300 is
articulated about the articulation axis B-B. As can be seen in FIG.
58, the multiple support link assembly 920 comprises a middle
support member 922 that is pivotally pinned to the proximal end 320
of the elongate channel 302 in the manners described above. The
middle support member 922 further includes centrally disposed slot
930 for axially receiving the distal firing beam 2280 therethrough.
The multiple support link assembly 920 further comprises a proximal
support link 940 and a distal support link 950. The proximal
support link 940 includes a body portion 942 that has a rounded
proximal end 943 and a rounded distal end 944. The proximal support
link 940 further includes a pair of downwardly protruding lateral
support walls 945 that define a proximal slot therebetween.
Similarly, the distal support link 950 includes a body portion 952
that has a rounded proximal end 953 and a rounded distal end 954.
The distal support link 950 further includes a pair of downwardly
protruding lateral support walls 955 that define a distal slot
therebetween. As can be seen in FIG. 58, the distal firing beam
2280 is configured to extend between the lateral support walls 945
of the proximal support link 940 and the lateral support walls 955
of the distal support link 950. Each support wall 945 and 955
includes an inwardly facing arcuate surface as was described above.
The support surfaces serve to provide lateral support to the distal
firing beam 2280 as it flexes during articulation of the surgical
end effector 300. In addition, the closure sleeve assembly 2260 may
include a double pivot closure sleeve assembly of the type
described above that is configured to operably interact with the
anvil on the surgical end effector 300. Operation of the closure
sleeve assembly 2260 results in the opening and closing of the
anvil of the surgical effector in the various manners described
above.
[0378] FIG. 59 illustrates a portion of another elongate shaft
assembly 5700 that may be substantially similar to the elongate
shaft assembly 5200 except for the differences discussed below. In
particular, the articulation disc 5702 of the articulation system
5701 is rotated by a worm gear motor 5710 that is operably
supported in the nozzle housing 201. In one embodiment, for
example, a driven gear 5703 is integrally formed or otherwise
non-movably attached to the articulation disc 5702 such that it is
in meshing engagement with the worm gear drive 5712 of the motor
5710. In the illustrated example, a first articulation rod or
member 5720 may be directly attached to a portion of a surgical end
effector in any of the various manners described herein. A first
articulation pin 5722 is attached to the first articulation rod
5720 and is received within an arcuate first articulation slot 5704
formed in the articulation disc 5702. A first articulation biasing
member 5705 is received within the first articulation slot 5704 for
biasing contact with the first articulation pin 5722. Likewise, a
second articulation rod or member 5730 may be directly or
indirectly attached to a portion of a surgical end effector in any
of the various manners described herein. A second articulation pin
5732 is attached to the second articulation rod 5730 and is
received within an arcuate second articulation slot 5706 formed in
the articulation disc 5702. A second articulation biasing member
5707 is received within the second articulation slot 5706 for
biasing contact with the second articulation pin 5732.
[0379] FIG. 59 illustrates the articulation system 5701 in a
neutral or unarticulated configuration. As can be seen in that
Figure, the first articulation pin 5722 is in contact with the
first articulation biasing member 5705 and the second articulation
pin 5732 is in contact with the second articulation biasing member
5707. However, when in that neutral position, the first and second
articulation biasing members 5705, 5707 may not be in a compressed
state. Actuation of the motor 5710 to rotate the articulation disc
5702 in the rotary direction represented by arrow 5601 will apply a
pulling motion to the first articulation rod 5720 to cause the
first articulation rod 5720 to move in the proximal direction PD as
well as to apply a pushing motion to the second articulation rod
5730 to cause the second articulation rod 5730 to move in the
distal direction DD. Conversely, actuation of the motor 5710 to
rotate the articulation disc 5702 in the rotary direction
represented by arrow 5603 will apply a pushing motion to the first
articulation rod 5720 to cause the first articulation rod 5720 to
move in the distal direction DD as well as to apply a pulling
motion to the second articulation rod 5730 to cause the second
articulation rod 5730 to move in the proximal direction PD. Such
"pushing and pulling motions" as applied to the surgical end
effector, causes the surgical end effector to articulate about the
articulation axis in the various manners described above.
[0380] FIGS. 60-65 illustrate another articulation system 5800 that
may be employed with various elongate shaft assemblies and effector
arrangements described herein. In this embodiment, however, the
articulation system 5800 comprises a dual articulation disc
assembly 5810 that comprises a driver articulation disc 5820 and a
driven articulation disc 5830. Both of the articulation discs 5820,
5830 may, for example, be rotatably supported within the nozzle
housing of the elongate shaft assembly such that both discs 5820,
5830 are independently rotatable about a common axis. In various
embodiments, drive motions may be applied to the driver
articulation disc 5820 by an articulation drive link 5614 and
firing member arrangement 2220 as was described above. In other
embodiments, rotary drive motions may be applied to the driver
articulation disc 5820 by a worm gear motor 5710 in the manner
described above.
[0381] FIG. 61 illustrates one form of a driver disc 5820. As can
be seen in that Figure, the driver disc 5820 includes a first pair
of first arcuate articulation slots 5822L, 5822R that each has a
first arcuate length FL. In addition, the driver articulation disc
5820 further includes a driver slot 5824 that is centrally disposed
between the first articulation slots 5822 as can be seen in FIG.
61. Depending upon the method employed to drive the driver
articulation disc 5820, the articulation drive link 5614 or the
worm gear motor 5710 may interface with the driver articulation
disc 5820 in the various manners described above to apply rotary
motions to the driver articulation disc 5820. FIG. 62 illustrates
one form of a driven articulation disc 5830. As can be seen in that
Figure, the driven articulation disc 5830 includes a second pair of
second arcuate articulation slots 5832L, 5832R that each have a
second arcuate length "SL" that is less than the first arcuate
length FL. In addition, the driven articulation disc 5830 further
includes a driver post 5834 that is configured to be movably
received within the driver slot 5824.
[0382] Referring now to FIGS. 60 and 63-65, the articulation system
5800 further comprises a first articulation rod 5840 that may be
directly or indirectly attached to a portion of a surgical end
effector in any of the various manners described herein. A first
articulation pin 5842 is attached to the first articulation rod
5840 and is received within corresponding first and second arcuate
articulation slots 5822L, 5832L. Likewise, a second articulation
rod or member 5850 may be directly attached to a portion of the
same surgical end effector in any of the various manners described
herein. A second articulation pin 5852 is attached to the second
articulation rod 5850 and is received within corresponding first
and second arcuate articulation slots 5822R, 5832R. FIG. 60
illustrates the articulation system 5800 in a null position wherein
the surgical end effector may be freely moved. FIG. 63 illustrates
the position of the articulation system 5800 upon an initial
application of rotary motion to the driver articulation disc 5820
in the direction represented by arrow 5860. As can be seen in that
Figure, upon initial rotation of the driver articulation disc 5820,
the articulation slots 5822L, 5832L are offset from each other and
the articulation slots 5822R, 5832R are offset from each other, but
no motion has yet been transferred to articulation rods 5840, 5850.
FIG. 64 illustrates the position of the articulation system 5800
upon continued application of the rotary motion to the driver
articulation disc 5820 in the direction of arrow 5860 sufficient
enough to result in, for example, a seventy-five degree of
articulation of the surgical end effector relative to the shaft
axis. As can be seen in that Figure, a pushing motion is applied to
the first articulation rod 5840 to cause the first articulation rod
5840 to axially move in the distal direction DD and a pulling
motion is applied to the second articulation rod 5850 to cause the
second articulation rod 5850 to axially move in the proximal
direction PD. The movement of the first and second articulation
rods 5840, 5850 in opposite directions results in the articulation
of the surgical end effector operably interfacing therewith. FIG.
65 illustrates the position of the articulation system 5800 upon
application of the rotary motion to the driver articulation disc
5820 in an opposite direction represented by arrow 5862 that is
sufficient enough to result in, for example, a seventy-five degree
of articulation of the surgical end effector relative to the shaft
axis in an opposite articulation direction. As can be seen in that
Figure, a pushing motion is applied to the second articulation rod
5850 to cause the second articulation rod 5850 to axially move in
the distal direction DD and a pulling motion is applied to the
first articulation rod 5840 to cause the first articulation rod
5840 to axially move in the proximal direction PD. Such opposing
movements of the first and second articulation rods 5840, 5850
result in the articulation of the surgical end effector that is
operably attached thereto. In one configuration, the first
articulation rod 5840 may only apply a pulling force to the
surgical end effector when the articulation driver disc 5820 has
been rotated a sufficient distance as to attain a seventy-five
degree range of articulation.
[0383] FIGS. 66-70 illustrate a surgical end effector 6300 that
comprises first and second jaws that are simultaneously movable
between open and closed positions relative to the shaft axis SA-SA.
The first and second jaws may comprise a variety of surgical jaw
arrangements without departing from the spirit and scope of the
present invention. Gaining access to target tissue with the jaws of
a surgical end effector can, at times, be challenging. The
maneuverability of a surgical end effector, particularly a surgical
end effector that is configured to cut and staple tissue, may be
enhanced if the distance between the point at which the jaws are
supported relative to each other and the proximal-most staple
locations is minimized. For example, those surgical end effectors
that only employ one movable jaw (i.e., one of the jaws is fixed
relative to the shaft axis) may require that the one movable jaw
have a relatively large range of travel in order to accommodate the
target tissue. Such larger range of travel can complicate the
process of using the end effector to advantageously position the
target tissue. The surgical end effector 6300 employs first and
second jaws that move relative to each other and the shaft axis
about a common pivot axis. Such arrangement enables the distance
between the pivot axis and the proximal-most staple locations to be
shortened when compared to the same distance on certain surgical
end effectors that employ only one movable jaw, for example.
[0384] In the illustrated example, a first jaw 6310 includes an
elongate channel 6312 that is configured to support a surgical
staple cartridge 6320 therein. As can be seen in FIG. 70, the
surgical staple cartridge 6320 is configured to operably support a
plurality of staple drivers 6322 therein that operably support
surgical staples 6324 thereon. The staple drivers 6322 are movably
supported within corresponding driver slots 6321 formed in the
surgical staple cartridge 6320. The staple drivers 6322 are
retained within their respective driver slot 6321 by a cartridge
pan 6330 that clips to or is otherwise attached to the surgical
staple cartridge 6320. The staple drivers 6322 are arranged in rows
on each side of an elongate slot 6326 in the surgical staple
cartridge 6320 to accommodate the axial passage of a firing member
6340 therethrough. A wedge sled 6350 is movably supported within
the surgical staple cartridge 6320 and is configured to be
drivingly engaged by the firing member 6340 as the firing member
6340 is driven from a starting position adjacent to the proximal
end of the surgical staple cartridge 6320 and an ending position
within a distal portion of the surgical staple cartridge 6320. As
was discussed above, as the wedge sled 6350 is driven in the distal
direction through the surgical staple cartridge 6320, the wedge
sled 6350 drivingly contacts the staple drivers 6322 to drive them
toward the cartridge deck surface 6323. The firing member 6340
includes a tissue cutting surface 6346 that serves to cut the
tissue clamped between the jaws as the firing member 6340 is driven
distally. A distal firing beam (not shown) of the various types
described herein is operably attached to the firing member 6340 as
well as to an intermediate firing shaft portion 2222 or other
firing system arrangement. Operation of the intermediate firing
shaft portion 2222 to drive and retract the distal firing beam was
discussed in detail above and will not be repeated for the sake of
brevity. Other firing beam and firing system arrangements
(motor-powered as well as manually-powered) may also be employed to
power the firing member without departing from the spirit and scope
of the present invention.
[0385] The illustrated surgical end effector 6300 is also
configured for selective articulation about an articulation axis
B-B that is substantially transverse to the shaft axis SA-SA. As
can be seen in FIGS. 66-70, the surgical end effector 6300 includes
an end effector mounting assembly 6390 that is adapted to be
pivotally mounted to, for example, a distal shaft frame (not shown)
that includes a pivot pin that is configured to be rotatably
received within the mounting hole 6392 in the end effector mounting
assembly 6390. The surgical end effector 6300 may be articulated by
an articulation lock and first and second articulation rod
arrangements of the type described above. As can be seen in FIG.
70, the end effector mounting assembly 6390 further includes a pair
of opposed, laterally extending trunnion pins 6394. The trunnion
pins 6394 extend laterally from the opposed lateral sides 6391 of
the end effector mounting assembly 6390 that also define a pocket
area 6395 that is configured to receive the firing member 6340
therein. The trunnion pins 6394 serve to define a pivot axis PA-PA
about which the first and second jaws 6310, 6360 may pivot. The
proximal end 6314 of the first jaw 6310 or elongate channel 6312
includes a pair of opposed U-shaped or open ended slots 6316 that
are adapted to receive a corresponding one of the trunnion pins
6394 therein. Such arrangement serves to movably or pivotally
journal the first jaw 6310 to the end effector mounting assembly
6390.
[0386] The illustrated surgical end effector 6300 further comprises
a second jaw 6360 that may comprise an anvil 6362. The illustrated
anvil 6362 includes an anvil body 6364 that includes an elongate
slot 6366 and two staple forming surfaces 6368 formed on each side
thereof. The anvil 6362 further has a proximal end portion 6370
that has a pair of U-shaped or open ended slots 6372 that are also
adapted to receive a corresponding one of the trunnion pins 6394
therein. Such arrangement serves to movably or pivotally journal
the second jaw 6360 to the end effector mounting assembly 6390 such
that the first and second jaws may move relative to each other as
well as to relative to the shaft axis SA-SA. The first and second
jaws 6310 and 6360 may be movably actuated by a closure system of
the various types disclosed herein. For example, a first closure
drive system of the type described herein may be employed to
actuate a closure sleeve in the above-described manner. The closure
sleeve may also be attached to an end effector closure sleeve 6272
that may be pivotally attached to the closure sleeve by a double
pivot closure sleeve assembly in the manner described above. As was
described above, for example, axial movement of the closure sleeve
may be controlled through actuation of a closure trigger 32. As can
be seen in FIGS. 67-69, the end effector closure sleeve 6272
extends over the end effector mounting assembly 6390 and is
configured to engage the proximal end 6370 of the second jaw 6360
as well as the proximal end 6314 of the first jaw 6310. At least
one cam surface 6336 may be formed on the proximal end 6314 of the
first jaw 6310 such that when the distal end 6274 of the end
effector closure sleeve 6272 contacts the cam surface(s) 6336, the
first jaw 6310 is cammed toward the second jaw and the shaft axis
SA-SA. Likewise, one or more cam surfaces 6376 may be formed on the
proximal end portion 6370 of the second jaw 6360 such that when
contacted by the distal end 6274 of the end effector closure sleeve
6272, the second jaw 6360 is moved toward the first jaw 6310 and
the shaft axis SA-SA. The cam surfaces 6336, 6376 may be configured
and positioned relative to each other such that the first and
second jaws close at different "closure rates" or closure times
relative to each other. One such arrangement is depicted in FIG.
68. As can be seen in FIG. 68, the distance along an arcuate path
between a point P.sub.1 on the first jaw 6310 and a corresponding
point P.sub.2 on the second jaw 6360 when the first and second jaws
are in their respective fully opened position is represented by
D.sub.T. The first and second points P.sub.1 and P.sub.2 are said
to "correspond to" each other. For example, the first point P.sub.1
and the second point P.sub.2 may each lie on a common line or axis
that extends therebetween and is perpendicular to the shaft axis
SA-SA. The distance along an arcuate path between another point
P.sub.A on the first jaw 6310 and the shaft axis SA-SA is
represented by D.sub.1 and the distance along another arcuate path
between another corresponding point P.sub.B on the second jaw and
the shaft axis SA-SA is represented by D.sub.2. Point P.sub.A and
point P.sub.B are also said to correspond to each other. For
example, point P.sub.A and point P.sub.B may lie on a common line
or axis that extends therebetween and which is perpendicular to the
shaft axis SA-SA. In the illustrated arrangement, the distance
D.sub.2 that the second jaw 6360 or anvil 6362 moves from the fully
open to the closed position wherein the staple-forming surface of
the anvil 6362 lies along the shaft axis SA-SA is greater than the
distance D.sub.1 that the first jaw 6310 or surgical staple
cartridge 6320 moves from the fully open position to the closed
position wherein the cartridge deck surface lies along the shaft
axis SA-SA. For example, in at least one arrangement, the second
jaw or anvil will open or move 2/3 of the distance D.sub.T (or
another distance along another travel path between the jaws) and
the first jaw or staple cartridge will open or move 1/3 of the
distance D.sub.T (or other distance along yet another travel path
between the jaws), so that, in essence, one jaw attains its fully
closed position quicker or faster than the other jaw attains its
fully closed position even though a closure motion or motions were
initially applied to both jaws at the same or similar times. For
example, the cam surfaces on the first and second jaws may be
arranged/configured to attain different jaw-movement ratios/rates
without departing from the spirit and scope of this embodiment of
the present invention. An opening spring 6380 (FIG. 70) may be
positioned between the proximal end 6314 of the first jaw 6310 and
the proximal end 6370 of the second jaw 6360 to bias the first and
second jaws 6310, 6360 to the open position when the end effector
closure sleeve 6272 is positioned in the starting or unactuated
position. See FIGS. 67-69.
[0387] To move the first and second jaws 6310, 6360 to a closed
position (FIG. 66), the clinician actuates the closure system to
move the end effector closure sleeve 6272 in the distal direction
DD to simultaneously contact the cam surface(s) 6336 on the
proximal end 6314 of the first jaw 6310 and the cam surface(s) 6376
on the proximal end 6370 of the second jaw 6360 to bias the first
and second jaws 6310, 6360 towards each other (and shaft axis
SA-SA) to the position shown in FIG. 66. While the end effector
closure sleeve 6272 is retained in that position, the first and
second jaws 6310 and 6360 are retained in that closed position.
Thereafter, the firing system may be actuated to axially advance
the firing member 6340 distally through the surgical end effector
6300. As can be seen in FIG. 70, the firing member 6340 may have a
foot portion 6342 that is configured to slidably engage a slotted
passage 6374 of the anvil 6362 and a top tab portion 6344 that is
adapted to be slidably received within a slotted passage 6318 in
the elongate channel 6312. See FIG. 69. Thus, such firing member
arrangement serves to positively retain the first and second jaws
6310, 6360 at a desired spacing arrangement during firing of the
firing member (i.e., during firing of the staples and cutting of
the tissue that is clamped between the first and second jaws 6310,
6360). A first jaw cover 6315 is removably attached to the elongate
channel 6312 and a second jaw cover 6363 is removably attached to
the anvil 6362 for assembly purposes as well as to prevent the
infiltration of tissue and/or body fluid into the first and second
jaws which may hamper or interfere with operation of the firing
member 6340.
[0388] FIG. 71 illustrates another surgical end effector 6300' that
is similar to surgical end effector 6300. As can be seen in that
Figure, the surgical end effector 6300' comprises two jaws that are
simultaneously movable between open and closed positions relative
to the shaft axis SA-SA. In the illustrated example, a first jaw
6310' includes an elongate channel 6312' that is configured to
support a surgical staple cartridge 6320' therein. The surgical
staple cartridge 6320' is configured to operably support a
plurality of staple drivers 6322 therein that operably support
surgical staples 6324 thereon. The staple drivers 6322 are movably
supported within corresponding driver pockets 6321' formed in the
surgical staple cartridge 6320'. The staple drivers 6322 are
retained within their respective driver pocket 6321' by a cartridge
pan 6330' that clips to or is otherwise attached to the surgical
staple cartridge 6320'. The staple drivers 6322 are arranged in
rows on each side of an elongate slot 6326' in the surgical staple
cartridge 6320 to accommodate the axial passage of a firing member
6340' therethrough. A wedge sled 6350' is movably supported within
the surgical staple cartridge 6320' and is configured to be driving
engaged by the firing member 6340' as the firing member 6340' is
driven from a starting position adjacent to the proximal end of the
surgical staple cartridge 6320' and an ending position within a
distal portion of the surgical staple cartridge 6320'. As was
discussed above, as the wedge sled 6350' is driven in the distal
direction through the surgical staple cartridge 6320', the wedge
sled 6350' drivingly contacts the staple drivers 6322 to drive them
toward the cartridge deck surface 6323'. The firing member 6340'
includes a tissue cutting surface 6346' that serves to cut the
tissue clamped between the jaws as the firing member 6340 is driven
distally. A distal firing beam (not shown) of the various types
described herein is operably attached to the firing member 6340' as
well as to an intermediate firing shaft portion 2222 or other
firing system arrangement. Operation of the intermediate firing
shaft portion 2222 to drive and retract the distal firing beam was
discussed in detail above and will not be repeated for the sake of
brevity. Other firing beam and firing system arrangements
(motor-powered as well as manually-powered) may also be employed to
power the firing member without departing from the spirit and scope
of the present invention.
[0389] The illustrated surgical end effector 6300' is also
configured for selective articulation about an articulation axis
B-B that is substantially transverse to the shaft axis SA-SA. The
end effector 6300' includes an end effector mounting assembly 6390'
that is adapted to be pivotally mounted to, for example, a distal
shaft frame that includes a pivot pin configured to be rotatably
received within a mounting hole 6392' in the end effector mounting
assembly 6390'. The surgical end effector 6300' may be articulated
by an articulation lock and first and second articulation rod
arrangements of the type described above. As can be seen in FIG.
71, the end effector mounting assembly 6390' further includes a
pair of opposed, laterally extending trunnion pins 6394'. The
trunnion pins 6394' extend laterally from the opposed lateral sides
6391' of the end effector mounting assembly 6390' that also define
a pocket area 6395' that is configured to receive the firing member
6340' therein. The trunnion pins 6394' serve to define a pivot axis
PA-PA about which the first and second jaws 6310', 6360' may pivot.
The proximal end 6314' of the first jaw 6310' or elongate channel
6312' includes a pair of opposed U-shaped or open ended slots 6316'
that are adapted to receive a corresponding one of the trunnion
pins 6394' therein. Such arrangement serves to movably or pivotally
journal the first jaw 6310' to the end effector mounting assembly
6390'.
[0390] The illustrated surgical end effector 6300' further
comprises a second jaw 6360' that may comprise an anvil 6362'. The
illustrated anvil 6362' includes an anvil body 6364' that includes
an elongate slot 6366' and two staple forming surfaces formed on
each side thereof. The anvil 6362' further has a proximal end
portion 6370' that has a pair of U-shaped or open ended slots 6372'
that are also adapted to receive a corresponding one of the
trunnion pins 6394' therein. Such arrangement serves to movably or
pivotally journal the second jaw 6360' to the end effector mounting
assembly 6390'. The first and second jaws 6310' and 6360' are
movably actuated by a closure system of the various types disclosed
herein. For example, a first closure drive system 30 may be
employed to actuate a closure sleeve 260 in the manner described
herein. The closure sleeve 260 may also be attached to an end
effector closure sleeve 6272 that may be pivotally attached to the
closure sleeve 260 by a double pivot closure sleeve assembly 271 in
the manner described above. As was described above, for example,
axial movement of the closure sleeve 260 may be controlled through
actuation of a closure trigger 32. The end effector closure sleeve
6272 extends over the end effector mounting assembly 6390' and is
configured to engage the proximal end 6370' of the second jaw 6360'
as well as the proximal end 6314' of the first jaw 6310'. At least
one cam surface 6336' may be formed on the proximal end 6314' of
the first jaw 6310' such that when the distal end 6274 of the end
effector closure sleeve 6272 contacts the cam surfaces 6336', the
first jaw 6310' is cammed toward the second jaw 6360' and the shaft
axis SA-SA. Likewise, one or more cam surfaces 6376' may be formed
on the proximal end portion 6370' of the second jaw 6360' such that
when contacted by the distal end 6274 of the end effector closure
sleeve 6272, the second jaw 6360' is moved toward the first jaw
6310' and the shaft axis SA-SA. A spring (not shown) may be
positioned between the proximal end 6314' of the first jaw 6310'
and the proximal end 6370' of the second jaw 6360' to bias the
first and second jaws 6310', 6360' to the open position when the
end effector closure sleeve 6272 is positioned in the starting or
unactuated position.
[0391] To move the first and second jaws 6310', 6360' to a closed
position, the clinician actuates the closure system to move the end
effector closure sleeve 6272 in the distal direction DD to
simultaneously contact the cam surface(s) 6336' on the proximal end
6314' of the first jaw 6310' and the cam surface(s) 6376' on the
proximal end 6370' of the second jaw 6360' to bias the first and
second jaws 6310', 6360' towards each other (and shaft axis SA-SA).
While the end effector closure sleeve 6272 is retained in that
position, the first and second jaws 6310' and 6360' are retained in
that closed position. Thereafter, the firing system may be actuated
to axially advance the firing member 6340' distally through the
surgical end effector 6300'. The firing member 6340' may have a top
tab portion 6344' that is configured to slidably engage a slotted
passage 6374' of the anvil 6362' and a foot portion 6342' that is
adapted to be slidably received within a slotted passage in the
elongate channel 6312'. Thus, such firing member arrangement serves
to positively retain the first and second jaws 6310', 6360' at a
desired spacing arrangement during firing of the firing member
(i.e., during firing of the staples and cutting of the tissue that
is clamped between the first and second jaws 6310', 6360'). A first
jaw cover 6315' is removably attached to the elongate channel 6312'
and a second jaw cover 6363' is removably attached to the anvil
6362' for assembly purposes as well as to prevent the infiltration
of tissue and/or body fluid into the first and second jaws which
may hamper or interfere with operation of the firing member
6340'.
[0392] The surgical end effector embodiments described herein that
employ jaws that both move relative to each other and relative to
the shaft axis may offer various advantages over other surgical end
effector arrangements wherein one of the jaws is fixed and does not
move, for example relative to the shaft axis. In such
configurations, it is often desirable for the one movable jaw to
have a relatively large range of movement relative to the fixed jaw
to enable the target tissue to be manipulated, positioned and then
clamped therebetween. In the embodiments wherein both jaws are
movable, each jaw doesn't require as large of range of motion to
accommodate manipulation, positioning and clamping of the target
tissue between the jaws. Such reduced movement of the anvil, for
example, may provide for improved tissue positioning. Such
arrangements may also enable the distance between the pivot axis
and the first staple positions to be minimized. In addition, the
firing member may always remain engaged with the movable jaws
(anvil and elongate channel) even during opening and closing
actions.
[0393] FIGS. 72-79 illustrate another surgical end effector 6400
that is configured to be operably attached to an elongate shaft
assembly of the types described herein which define a shaft axis
SA-SA. The surgical end effector 6400 comprises two jaws that are
simultaneously movable between open and closed positions relative
to the shaft axis SA-SA. The first and second jaws may comprise a
variety of different surgical related jaw arrangements. In the
illustrated example, a first jaw 6410 includes an elongate channel
6412 that is configured to support a surgical staple cartridge 6420
therein. As in the various surgical staple cartridges discussed
above, the surgical staple cartridge 6420 is configured to operably
support a plurality of staple drivers (not shown) therein that
operably support surgical staples (not shown) thereon. The staple
drivers are movably supported within corresponding driver pockets
formed in the surgical staple cartridge 6420. The staple drivers
are arranged in rows on each side of an elongate slot (not shown)
in the surgical staple cartridge 6420 to accommodate the axial
passage of a firing member 6440 therethrough. A wedge sled (not
shown) is movably supported within the surgical staple cartridge
6420 and is configured to be driving engaged by the firing member
6440 as the firing member 6440 is driven from a starting position
adjacent to the proximal end of the surgical staple cartridge 6420
and an ending position within a distal portion of the surgical
staple cartridge 6420. As was discussed above, as the wedge sled is
driven in the distal direction through the surgical staple
cartridge 6420, the wedge sled drivingly contacts the staple
drivers to drive them toward the cartridge deck surface (not
shown). The firing member 6440 includes a tissue cutting surface
6446 that serves to cut the tissue clamped between the jaws as the
firing member 6440 is driven distally. A distal firing beam (not
shown) of the various types described herein is operably attached
to the firing member 6440 as well as to an intermediate firing
shaft portion 2222 or other firing system arrangement. Operation of
the intermediate firing shaft portion 2222 to drive and retract the
distal firing beam was discussed in detail above and will not be
repeated for the sake of brevity. Other firing beam and firing
system arrangements (motor-powered as well as manually-powered) may
also be employed to power the firing member without departing from
the spirit and scope of the present invention.
[0394] The illustrated surgical end effector 6400 is also
configured for selective articulation about an articulation axis
B-B that is substantially transverse to the shaft axis SA-SA. As
can be seen in FIGS. 72-79, the surgical end effector 6400 includes
an end effector mounting assembly 6490 that is adapted to be
pivotally mounted to, for example, a distal shaft frame that
includes a pivot pin that is configured to be rotatably received
within the mounting hole 6492 in the end effector mounting assembly
6490. The surgical end effector 6400 may be articulated by an
articulation lock and first and second articulation rod
arrangements of the type described above. As can be seen in FIG.
74, a pair of cam plates 6500 are non-movably attached by a spring
pin 6502, for example, to the end effector mounting assembly 6490.
As can be further seen in FIG. 74, each cam plate 6500 has a cam
slot 6504 that has a closure wedge portion 6505 and an opening
wedge portion 6507. The closure wedge portion 6505 is formed from
two opposed closure cam surfaces 6506 and the opening wedge portion
6507 is formed from two opposed opening cam surfaces 6508. The
elongate channel 6412 includes two proximally extending actuator
arms 6416 that each has an opening trunnion pinion 6418 and a
closing trunnion pin 6419 protruding laterally therefrom. The
opening and closing trunnion pins 6418 and 6419 are received with
the cam slot 6504 of a corresponding cam plate 6500. Such
arrangement serves to movably or pivotally journal the first jaw
6410 to the end effector mounting assembly 6490.
[0395] The illustrated surgical end effector 6400 further comprises
a second jaw 6460 that may comprise an anvil 6462. The illustrated
anvil 6462 includes an anvil body 6464 that includes an elongate
slot 6466 and two staple forming surfaces 6468 formed on each side
thereof. The anvil 6462 further has a proximal end portion 6470
that includes two proximally extending actuator arms 6472
protruding therefrom. Each actuator arm 6472 has an opening
trunnion pinion 6474 and a closing trunnion pin 6476 protruding
laterally therefrom that are also received in the cam slot 6504 of
a corresponding cam plate 6500. Such arrangement serves to movably
or pivotally journal the second jaw 6460 to the end effector
mounting assembly 6490.
[0396] The first and second jaws 6410 and 6460 are movably actuated
by a closure system of the various types disclosed herein. For
example, a first closure drive system 30 may be employed to actuate
a closure sleeve in the manner described herein. The closure sleeve
260 may also be attached to an end effector closure sleeve 6572
that may be pivotally attached to the closure sleeve by a double
pivot closure sleeve assembly in the manner described above. As was
described above, for example, axial movement of the closure sleeve
may be controlled through actuation of a closure trigger. As can be
seen in FIGS. 77 and 78, the end effector closure sleeve 6572
extends over the end effector mounting assembly 6490 as well as the
actuator arms 6416 of the first jaw 6410 and the actuator arms 6472
of the second jaw 6460. As the closure sleeve 6572 is advanced
distally, the distal end 6574 of the closure sleeve 6572 contacts a
proximal end 6411 of the first jaw 6410 and a proximal end 6461 of
the second jaw 6460 and moves the first and second jaws 6410, 6460
in the distal direction DD. As the first and second jaws 6410, 6460
move distally, the closing trunnions 6419, 6476 enter the closure
wedge portion 6505 of the cam slot 6504 and the closure cam
surfaces 6506 cam the first and second jaws 6410, 6460 toward each
other to a closed position (FIGS. 73, 75, 77 and 78).
[0397] To facilitate opening of the first and second jaws 6410,
6460 with the closure sleeve 6572, the closure sleeve 6572 is
provided with two inwardly extending opening tabs 6576 that are
configured to engage the closure trunnions 6419, 6476 when the
closure sleeve 6572 is retracted in the proximal direction PD by
the closure system. As can be seen in FIGS. 72 and 76, for example,
as the closure sleeve 6572 moves in the proximal direction PD, the
opening tabs 6576 contact the closure trunnions 6419, 6476 and
drives the closure trunnions 6419, 6476 in the proximal direction
as well. The proximal movement of the closure trunnions 6419, 6476
causes the opening trunnions 6418 and 6474 to enter the opening
wedge portion 6507 of the cam plate slots 6504. The opening cam
surfaces 6508 interact with the opening trunnions 6418, 6474 and
cause the actuator arms 6416 and 6472 to rock open on their
respective rocker surfaces 6417 and 6475 as shown in FIGS. 76 and
79. As with the above-described arrangements wherein both the first
and second jaws move relative to the shaft axis SA-SA, the closure
wedge portion 6505 and the opening wedge portion 6507 may be
configured so that the first and second jaws close at different
closure rates or closure times relative to each other upon
application of a closure motion thereto.
[0398] FIGS. 80-84 illustrate another surgical end effector 7400
that comprises two jaws wherein one jaw is movable relative to the
other jaw between open and closed positions. In the illustrated
example, the first jaw 7410 comprises an anvil 7412. The
illustrated anvil 7412 has an anvil body 7414 that has a proximal
end portion 7416 that is non-movably attached to an end effector
mounting assembly 7430. For example, the proximal end portion 7416
comprises two upstanding lateral walls 7418 that each has a
mounting hole 7419 therein. See FIG. 82. The end effector mounting
assembly 7430 is received between the upstanding lateral walls 7418
and is non-movably attached thereto by a spring pin 7421 that
extends therethrough into holes 7419. The end effector mounting
assembly 7430 is adapted to be pivotally mounted to, for example, a
distal shaft frame that includes a pivot pin that is configured to
be rotatably received within the mounting hole 7432 in the end
effector mounting assembly 7430. The surgical end effector 7400 may
be articulated by an articulation lock and first and second
articulation rod arrangements of the type described above or by any
of the various articulation systems and articulation rod and/or
rod/cable arrangements described herein without departing from the
spirit and scope of the present invention. As can also be seen in
FIGS. 80 and 82, the anvil body 7414 also includes an elongate slot
7422 with two staple forming surfaces 7424 formed on each side
thereof.
[0399] The surgical end effector 7400 further includes a second jaw
7440 that comprises an elongate channel 7442 that is configured to
support a surgical staple cartridge 7450 therein. As in certain
surgical staple cartridges discussed above, the surgical staple
cartridge 7450 is configured to operably support a plurality of
staple drivers (not shown) therein that operably support surgical
staples (not shown) thereon. The staple drivers are movably
supported within corresponding driver pockets 7452 formed in the
surgical staple cartridge 7450. The staple drivers are arranged in
rows on each side of an elongate slot 7454 in the surgical staple
cartridge 7450 to accommodate the axial passage of a firing member
7460 therethrough. A cartridge pan 7451 is attached to the staple
cartridge 7450 to prevent the staple drivers from falling out of
their respective driver pockets 7452 when the surgical end effector
7400 is manipulated into various orientations. A wedge sled 7462 is
movably supported within the surgical staple cartridge 7450 and is
configured to be driving engaged by the firing member 7460 as the
firing member 7460 is driven from a starting position adjacent to
the proximal end of the surgical staple cartridge 7450 and an
ending position within a distal portion of the surgical staple
cartridge 7450. As was discussed above, as the wedge sled 7462 is
driven in the distal direction through the surgical staple
cartridge 7450, the wedge sled 7462 drivingly contacts the staple
drivers to drive them toward the cartridge deck surface (not
shown). The firing member 7460 includes a tissue cutting surface
7464 that serves to cut the tissue clamped between the jaws 7410,
7440 as the firing member 7460 is driven distally. A distal firing
beam 280 or of the other various types described herein is operably
attached to the firing member 7460 as well as to an intermediate
firing shaft portion 2222 or other firing system arrangement.
Operation of the intermediate firing shaft portion 2222 to drive
and retract the distal firing beam 280 was discussed in detail
above and will not be repeated for the sake of brevity. Other
firing beam and firing system arrangements (motor-powered as well
as manually-powered) may also be employed to power the firing
member without departing from the spirit and scope of the present
invention. A first jaw cover 7415 is removably attached to the
anvil 7412 a second jaw cover 7441 is removably attached to the
second jaw 7440 for assembly purposes as well as to prevent the
infiltration of tissue and/or body fluid into the first and second
jaws which may hamper or interfere with operation of the firing
member 6340.
[0400] As can be seen in FIG. 82, the elongate channel 7442
includes a proximal end portion 7444 that has two lateral side
portions 7445. Each lateral side portion 7445 has a corresponding
U-shaped or open ended slot 7446 therein that is adapted to receive
a corresponding pivot pin 7426 that laterally protrudes from the
proximal end portion 7416 of the anvil body 7414. Such arrangement
serves to movably or pivotally journal the second jaw 7440 or
elongate channel 7442 to the first jaw 7410 or anvil 7412. As can
be most particularly seen in FIGS. 80, 82 and 84, closure ramp
segments 7447 are formed on the proximal end 7444 of the elongate
channel 7442. In addition, each lateral side 7445 of the proximal
end portion 7444 has a lateral recess area 7448 formed therein.
Each lateral recessed area 7448 is located proximal to a
corresponding closure ramp segment 7447. An opening ramp or cam
7449 is formed adjacent the proximal end of each lateral recessed
area 7448. Each opening ramp or cam 7449 terminates in a top
surface 7580. See FIGS. 82 and 84.
[0401] The second jaw 7440 or elongate channel 7442 may be movably
actuated relative to the first jaw 7410 or anvil 7412 by a closure
system of the various types disclosed herein. For example, a
closure drive system of the types described herein may be employed
to actuate a closure sleeve of the types described herein as was
discussed in detail above. The closure sleeve may also be attached
to an end effector closure sleeve 7572 that may be pivotally
attached to the closure sleeve by a double pivot arrangement in the
manner described above. As was described above, for example, axial
movement of the closure sleeve may be controlled through actuation
of a closure trigger. In other arrangements, the closure sleeve may
be axially moved by means of a robotic control system, etc. As can
be seen in FIGS. 80, 81, 83 and 84, the end effector closure sleeve
7572 extends over the end effector mounting assembly 7430 as well
as the proximal end portion 7444 of the elongate channel 7442 of
the second jaw 7440. The end effector closure sleeve 7572 includes
two diametrically opposed opening members 7574 that are configured
to operably engage the proximal end portion 7444 of the second jaw
7440 or elongate channel 7442. In the illustrated embodiment, the
opening members 7574 comprise inwardly extending opening tabs 7576
that are formed in portions of the end effector closure sleeve
7572.
[0402] The second jaw 7440 is moved to a closed position (FIGS. 81
and 83) by advancing the end effector closure sleeve 7572 in the
distal direction DD. As the end effector closure sleeve 7572 moves
distally, the distal end 7575 thereof contacts the closure ramp
segments 7447 that are formed on the proximal end 7444 of the
elongate channel 7442 and serves to cam the elongate channel 7442
towards the anvil 7412. Once the end effector closure sleeve 7552
has been moved to its distal-most position, the distal end 7575
contacts an abutment surface 7443 on the elongate channel 7442 to
maintain the closure load or closing force on the elongate channel
7442. See FIGS. 81 and 83. When the end effector closure sleeve
7572 is in the fully-closed position, the ends of the opening tabs
7576 are received in the corresponding lateral recess areas 7448.
To move the second jaw 7440 or elongate channel 7442 to an open
position, the closure system is actuated to move the closure sleeve
7572 in the proximal direction PD. As the end effector closure
sleeve 7572 moves proximally, the opening tabs 7572 ride up the
corresponding opening ramp or cam 7449 on the proximal end portion
7444 of the elongate channel 7442 to cam or pivot the elongate
channel 7442 away from the anvil 7412. Each tab rides up the cam
7449 onto the top surface top surface 7580 and serves to positively
retain the elongate channel 7442 in that fully open position. See
FIG. 84.
[0403] FIGS. 85-87 illustrate another surgical end effector 8400
that comprises two jaws 8410, 8440 that are simultaneously movable
between open and closed positions relative to the shaft axis SA-SA.
In the illustrated example, the first jaw 8410 comprises an anvil
8412. The illustrated anvil 8412 has an anvil body 8414 that has a
proximal end portion 8416 that movably interfaces with an end
effector adapter 8600. As can be seen in FIG. 85, the end effector
adapter 8600 includes two distally extending distal walls 8602 that
each has a lateral pivot pin 8604 protruding laterally therefrom.
Each lateral pivot pin 8604 is received in a corresponding open
ended U-shaped slot 8418 formed in the lateral side walls 8417 of
the proximal end portion 8416 of the anvil 8412. See FIG. 85. Such
arrangement permits the elongate channel 8412 to move or pivot
relative to the end effector adapter 8600. As can be further seen
in FIG. 85, the end effector adapter 8600 is non-movably attached
to and end effector mounting assembly 8430. For example, the end
effector adapter 8600 further includes two upstanding lateral walls
8606 that each has a mounting hole 8608 therein. The end effector
mounting assembly 8430 is received between the upstanding lateral
walls 8606 and is non-movably attached thereto by a spring pin 8421
that extends therethrough into holes 8608. The effector mounting
assembly 8430 is adapted to be pivotally mounted to, for example, a
distal shaft frame that includes a pivot pin that is configured to
be rotatably received within the mounting hole 8432 in the end
effector mounting assembly 8430. The surgical end effector 8400 may
be articulated by an articulation lock and first and second
articulation rod arrangements of the type described above or by any
of the various articulation systems and articulation rod and/or
rod/cable arrangements described herein without departing from the
spirit and scope of the present invention. As can also be seen in
FIG. 85, the anvil body 8414 also includes an elongate slot 8422
with two staple forming surfaces 8424 formed on each side
thereof.
[0404] The surgical end effector 8400 further includes a second jaw
8440 that comprises an elongate channel 8442 that is configured to
support a surgical staple cartridge 8450 therein. As in the various
surgical staple cartridges discussed above, the surgical staple
cartridge 8450 is configured to operably support a plurality of
staple drivers (not shown) therein that operably support surgical
staples (not shown) thereon. The staple drivers are movably
supported within corresponding driver pockets 8452 formed in the
surgical staple cartridge 8450. The staple drivers are arranged in
rows on each side of an elongate slot 8454 in the surgical staple
cartridge 8450 to accommodate the axial passage of a firing member
8460 therethrough. A cartridge pan 8451 is attached to the staple
cartridge 8450 to prevent the staple drivers from falling out of
their respective driver pockets 8452 when the surgical end effector
8400 is manipulated into various orientations. A wedge sled 8462 is
movably supported within the surgical staple cartridge 8450 and is
configured to be drivingly engaged by the firing member 8460 as the
firing member 8460 is driven from a starting position adjacent to
the proximal end of the surgical staple cartridge 8450 and an
ending position within a distal portion of the surgical staple
cartridge 8450. As was discussed above, as the wedge sled 8462 is
driven in the distal direction through the surgical staple
cartridge 8450, the wedge sled 8462 drivingly contacts the staple
drivers to drive them toward the cartridge deck surface (not
shown). The firing member 8460 includes a tissue cutting surface
8464 that serves to cut the tissue clamped between the jaws 8410,
8440 as the firing member 8460 is driven distally. A distal firing
beam 280 or of the other various types described herein is operably
attached to the firing member 8460 as well as to an intermediate
firing shaft portion 2222 or other firing system arrangement.
Operation of the intermediate firing shaft portion 2222 to drive
and retract the distal firing beam 280 was discussed in detail
above and will not be repeated for the sake of brevity. Other
firing beam and firing system arrangements (motor-powered as well
as manually-powered) may also be employed to power the firing
member without departing from the spirit and scope of the present
invention. A first jaw cover 8415 is removably attached to the
anvil 8412 and a second jaw cover 8441 is removably attached to the
second jaw 8440 for assembly purposes as well as to prevent the
infiltration of tissue and/or body fluid into the first and second
jaws which may hamper or interfere with operation of the firing
member 8460.
[0405] As can be seen in FIG. 85, the elongate channel 8442
includes a proximal end portion 8444 that has two lateral side
portions 8445. Each lateral side portion 8445 has a corresponding
U-shaped or open ended slot 8446 therein that is adapted to receive
a corresponding t lateral pivot pin 8604 that protrudes laterally
from the end effector adapter 8600. Such arrangement serves to
movably or pivotally journal the second jaw 8440 or elongate
channel 8442 to the first jaw 8410 or anvil 8412. As can also be
seen in FIG. 85, closure ramp segments 8447 are formed on the
proximal end 8444 of the elongate channel 8442. In addition, each
lateral side 8445 of the proximal end portion 8444 has a second
lateral recessed area 8448 formed therein. Each second lateral
recessed area 8448 is located proximal to a corresponding second
closure ramp segment 8447. A second opening ramp or cam 8449 is
formed adjacent the proximal end of each second lateral recessed
area 8448. Each second opening ramp or cam 8449 terminates in a
second top surface 8450. Similarly, a first recessed area 8420 is
formed on the bottom of each of the side walls 8417 of the proximal
end portion 8416 of the anvil 8412. A first opening ramp or cam
8426 is formed adjacent the proximal end of each first lateral
recessed area 8420. Each first opening ramp or cam 8426 terminates
in a first top surface 8428.
[0406] The second jaw 8440 or elongate channel 8442 and the first
jaw 8410 or anvil 8412 may be simultaneously moved between open and
closed positions by a closure system of the various types disclosed
herein. For example, a closure drive system 30 may be employed to
actuate a closure sleeve 260 in the manner described herein. The
closure sleeve 260 may also be attached to an end effector closure
sleeve 8572 that may be pivotally attached to the closure sleeve
260 by a double pivot arrangement in the manner described above. As
was described above, for example, axial movement of the closure
sleeve 260 may be controlled through actuation of a closure trigger
32. In other arrangements, the closure sleeve may be axially moved
by means of a robotic control system, etc. As can be seen in FIGS.
86 and 87, the end effector closure sleeve 8572 extends over the
end effector mounting assembly 8430, the end effector adapter 8600
as well as the proximal end portion 8444 of the elongate channel
8442 of the second jaw 8440 and the proximal end portion 8416 of
the first jaw 8410 or anvil 8412. The end effector closure sleeve
8572 includes two diametrically opposed, first opening members 8574
that are configured to operably engage the proximal end portion
8416 of the first jaw 8410. In the illustrated embodiment, the
first opening members 8574 comprise inwardly extending first
opening tabs 8576 that are formed in portions of the end effector
closure sleeve 8572. Likewise, the end effector closure sleeve 8572
further includes two diametrically opposed, second opening members
8580 that are configured to operably engage the proximal end
portion 8444 of the second jaw 8440. In the illustrated embodiment,
the second opening members 8580 comprise inwardly extending second
opening tabs 8582 that are formed in portions of the end effector
closure sleeve 8572.
[0407] The first and second jaws, 8410, 8440 are simultaneously
moved to a closed position (FIG. 86) by advancing the end effector
closure sleeve 8572 in the distal direction DD. As the end effector
closure sleeve 8572 moves distally, the distal end 8575 thereof
contacts the bottom of the proximal end portion 8416 of the first
jaw 8410 or anvil 8412 as well as the closure ramp segments 8447
that are formed on the proximal end 8444 of the elongate channel
8442 and serves to cam the first and second jaws 8410, 8440 towards
each other. Once the end effector closure sleeve 8572 has been
moved to its distal-most position, the distal end 8575 of the end
effector closure sleeve 8572 contacts first abutment surfaces 8419
on the first jaw 8410 or anvil 8412 as well as a second abutment
surface 8443 on the second jaw 8440 or elongate channel 8442 to
maintain the closure load or closing force on both of the jaws
8410, 8440. See FIG. 86. When the end effector closure sleeve 8572
is in the fully-closed position, the ends of the first opening tabs
8576 are received in the corresponding first lateral recesses areas
8420 and the ends of the second opening tabs 8582 are received in
the corresponding second lateral recess areas 8448. To move the
first and second jaws 8410, 8440 away from each other to open
positions, the closure system is actuated to move the closure
sleeve 8572 in the proximal direction PD. As the end effector
closure sleeve 8572 moves proximally, the first opening tabs 8576
ride up the corresponding first opening ramp or cam 8426 on the
bottom of the proximal end portion 8416 of the first jaw 8410 to
cam or pivot the first jaw 8410 or anvil 8412 in a direction away
from the second jaw 8440 or elongate channel 8442 and the second
opening tabs 8582 ride up the corresponding second ramps 8449 on
the proximal end portion 8444 of the elongate channel 8442 to cam
or pivot the elongate channel 8442 in a direction away from the
first jaw or anvil 8412. Each of the first tabs 8576 rides up the
corresponding cam or ramp 8426 onto the corresponding first locking
surface 8428 and each of the second tabs 8582 rides up the
corresponding second cam or ramp 8449 onto the corresponding second
locking surface 8450 to thereby retain the first and second jaws
8410, 8400 in the open position. The reader will appreciate that
the axial position of the first tabs 8576 relative to the second
tabs 8582 may be positioned so as to simultaneously move the first
and second jaws away from each other or they may be axially offset
so that one of the jaws moves before the other jaw moves.
[0408] FIGS. 88-93 illustrate portions of another surgical
instrument 9010 that includes a surgical end effector 9300 that
operably interfaces with an elongate shaft assembly 9200. The
surgical end effector 9300 is similar to surgical end effector 300
that was discussed in detail above and includes a first jaw in the
form of an elongate channel 9302 that is configured to operably
support a surgical staple cartridge 304 therein. The illustrated
surgical end effector 9300 further includes a second jaw in the
form of an anvil 310 that is supported on the elongate channel 9302
for movement relative thereto. The anvil 310 may be movably
actuated by the closure system described above and shown in FIGS.
88 and 91. For example, a first closure drive system may be
employed to actuate a closure sleeve 260 in the manner described
herein. The closure sleeve 260 is attached to an end effector
closure sleeve 272 that is pivotally attached to the closure sleeve
260 by a double pivot closure sleeve assembly 271 in the manner
described above. As was described above, for example, axial
movement of the closure sleeve 260 may be controlled through
actuation of a closure trigger. As was also described above, the
closure sleeve 272 includes opening cams that serve to movably
actuate the anvil 310 to an open position. In use, the closure
sleeve 260 is translated distally (direction DD) to close the anvil
310, for example, in response to the actuation of the closure
trigger. The anvil 310 is closed by distally translating the
closure sleeve 260 in the distal direction DD and as well as the
end effector closure sleeve 272 that is pivotally coupled thereto.
As the end effector closure sleeve 272 is driven distally, the cam
tabs 358 of the opening cams 354 move distally within the cam slots
318 in the anvil 310 to operably interface or ride on the cam
surfaces 319 to cam the body portion 312 of the anvil 310 away from
the surgical staple cartridge 304 into an open position. The anvil
310 is closed by distally translating the closure sleeve 260 in the
distal direction DD until the distal end 275 of the end effector
closure sleeve 272 rides up the anvil attachment arms 316 to
contact the which causes the cam tabs 358 to move in the proximal
direction PD within the cam slots 318 on the cam surfaces 319 to
pivot the anvil 310 into the open position.
[0409] As can be seen in FIG. 91 for example, the elongate shaft
assembly 9200 includes a two piece shaft frame or spine assembly
9812 upon which the closure sleeve assembly 260 is received. The
spine assembly 9812 includes a proximal spine portion 9814 and a
distal spine portion 9816. The proximal spine portion 9816 may be
rotatably journaled in the handle or housing (not shown) in the
various manners described herein to facilitate rotation of the
surgical end effector 9300 about the shaft axis SA. Although not
shown, the surgical instrument 9010 may also include a firing beam
arrangement and any of the various firing drive system arrangements
disclosed herein for driving a firing member through the surgical
staple cartridge in the various manners discussed above. As can be
seen in FIG. 91, the distal spine portion 9816 includes a distal
end portion 9818 that has an upwardly protruding pivot pin 9819
thereon that is adapted to be pivotally received within a pivot
hole 9328 formed in the proximal end portion 9320 of the elongate
channel 9302. Such arrangement facilitates pivotal travel of the
elongate channel 9302 of the surgical end effector 9300 relative to
the spine assembly 9812 about an articulation axis B-B that is
defined by the pivot hole 9328. As indicated above, the
articulation axis B-B is transverse to the shaft axis SA-SA that is
defined by elongate shaft assembly 9200.
[0410] Still referring to FIG. 91, the elongate shaft assembly 9200
further includes an articulation system, generally designated as
9900 that includes a first articulation bar 9910 and a second
articulation bar 9920. The first articulation bar 9910 operably
interfaces with a first articulation motor 9912 that is operably
supported in the surgical instrument handle or housing or portion
of a robotically controlled system. As can be seen in FIGS. 92 and
93, the first articulation bar 9910 is attached to a first
articulation nut 9914 that is threadably received on a first
threaded drive shaft 9916 of the first articulation motor 9912.
Rotation of the first threaded drive shaft 9916 in a first rotary
direction will result in the distal advancement of the first
articulation bar 9910 in the distal direction DD and rotation of
the first threaded drive shaft 9916 in a second or opposite rotary
direction will result in the proximal advancement of the first
articulation drive bar 9910 in the proximal direction PD.
[0411] The illustrated articulation system 9900 further includes a
second articulation bar 9920 that operably interfaces with a second
articulation motor 9922 that is operably supported in the surgical
instrument handle or housing or portion of a robotically controlled
system. As can be seen in FIGS. 92 and 93, the second articulation
bar 9920 is attached to a second articulation nut 9924 that is
threadably received on a second threaded drive shaft 9926 of the
second articulation motor 9922. Rotation of the second threaded
drive shaft 9926 in a first rotary direction will result in the
proximal advancement of the second articulation bar 9920 in the
proximal direction PD and rotation of the second threaded drive
shaft 9926 in a second or opposite rotary direction will result in
the distal advancement of the second articulation drive bar 9920 in
the distal direction DD.
[0412] The articulation system 9900 further includes a
cross-linkage assembly 9940 that is operably attached to the first
and second articulation bars 9910, 9920. As can be seen in FIG. 91,
the cross-linkage assembly 9940 includes a middle support member
9950 that is pivotally pinned to the proximal end 9320 of the
elongate channel 9302 with a first pin 9952. The middle support
member 9950 further includes a proximal connector tab 9954 that
includes a slot 9956 for receiving a second pin 9958 therein for
pivotally attaching the proximal connector tab 9954 to the distal
end portion 9818 of the distal spine portion 9816. The pin and slot
arrangement facilitate pivotal and axial travel of the middle
support member 9950 relative to the spine assembly 9812. The middle
support member 9950 further includes a slot 9960 for receiving a
firing beam therethrough. The middle support member 9950 serves to
provide lateral support to the firing beam as it flexes to
accommodate articulation of the surgical end effector 9300.
[0413] As can be most particularly seen in FIGS. 92 and 93, the
middle support member 9950 has a proximal linkage tab portion 9970
that facilitates attachment of the first and second articulation
bars 9910, 9920 thereto. In particular, a distal end 9911 of the
first articulation bar 9910 is pivotally attached to a first
articulation link 9972 that is pivotally pinned to the proximal
linkage tab portion 9970. Likewise, a distal end 9921 of the second
articulation bar 9920 is pivotally pinned to a second articulation
link 9974 that is pivotally pinned to the proximal linkage tab
portion 9970 of the middle support member 9950. FIG. 92 illustrates
articulation of the surgical end effector 9300 in the direction
represented by arrow 9980. As can be seen in that Figure, the first
threaded drive shaft 9916 of the first articulation motor is
rotated in a first rotary direction to drive the first articulation
bar 9910 in the distal direction. In addition, the second threaded
drive shaft 9926 of the second articulation motor 9922 is rotated
in a second rotary direction to draw the second articulation bar
9920 in the proximal direction. The first and second articulation
motors 9912, 9922 are operated by a computer controlled system and,
as can be seen in FIG. 92, the distance that first articulation bar
9910 moves in the distal direction is not equal to the distance in
which the second articulation bar 9920 moves in the proximal
direction.
[0414] FIG. 93 illustrates articulation of the surgical end
effector 9300 in the direction represented by arrow 9982. As can be
seen in that Figure, the second threaded drive shaft 9926 of the
second articulation motor 9922 is rotated in a first rotary
direction to drive the second articulation bar 9920 in the distal
direction. In addition, the first threaded drive shaft 9916 of the
first articulation motor 9912 is rotated in a second rotary
direction to draw the first articulation bar 9910 in the proximal
direction. The first and second articulation motors 9912, 9922 are
operated by a computer controlled system and, as can be seen in
FIG. 92, the distance that second articulation bar 9920 moves in
the distal direction is not equal to the distance in which the
first articulation bar 9910 moves in the proximal direction. In
alternative arrangements, only one articulation motor may be
employed to articulate the end effector. In such arrangements, for
example, the second link may be proximally coupled to the first
link by means of a rack and pinion arrangement similar to those
rack and pinion arrangements disclosed in detail herein.
[0415] FIGS. 94 and 95 illustrate surgical staple cartridges 9304
and 9304' that each include a light member 9305 for illuminating
the distal end of the surgical end effector in which it is
supported. Each of the staple cartridges 9304, 9304' may have
conductors (not shown) that are arranged on the bottom of the
cartridge or on the cartridge sides that are configured to
electrically contact corresponding conductors in the elongate
channel that communicate with a source of electrical energy located
in the instrument handle or housing. Thus, when the cartridge 9304,
9304' are properly seated in the elongate channel of the surgical
end effector, the light 9305 therein may receive power from the
source of electrical power in the handle or housing through the
corresponding conductors.
[0416] FIGS. 96-105 illustrate portions of another surgical
instrument 10010 that includes a surgical end effector 10300 that
operably interfaces with an elongate shaft assembly 10200 that
employs many of the features of the various shaft assemblies
disclosed herein. The surgical end effector 10300 may essentially
comprise any of the various end effectors described herein or it
may comprise other forms of surgical end effectors that are
configured to perform other surgical actions/procedures. In the
illustrated arrangement, for example, the surgical end effector
10300 is adapted to cut and staple tissue and includes a first jaw
in the form of an elongate channel 10302 that is configured to
operably support a surgical staple cartridge 10304 therein. See
FIGS. 96 and 97. The illustrated surgical end effector 10300
further includes a second jaw in the form of an anvil 10310 that is
supported on the elongate channel 10302 for movement relative
thereto. See FIG. 96. The anvil 10310 may be movably actuated by
one of the closure drive systems described herein. For example, a
first closure drive system may be employed to actuate a closure
sleeve 260 in the manner described herein. The closure sleeve 260
is attached to an end effector closure sleeve 272 that is pivotally
attached to the closure sleeve 260 by a double pivot closure sleeve
assembly 271 in any of the manners described herein. As was
described above, for example, axial movement of the closure sleeve
260 may be controlled through actuation of a closure trigger. As
the end effector closure sleeve 272 is advanced in the distal
direction D-D, the anvil 10310 is cammed closed. In at least one
arrangement, a spring (not shown) may be employed to pivot the
anvil 10310 to an open position when the end effector closure
sleeve 272 is retracted back to a starting position.
[0417] As can be seen in FIGS. 96-105, the surgical end effector
10300 may be articulated relative to the elongate shaft assembly
10200 about an articulation joint 10270. In the illustrated
example, the elongate shaft assembly 10200 includes articulation
system designated as 10800 that employs an articulation lock 10810
that is similar to articulation locks 350 and 810 described above.
See FIG. 97. Those components of articulation lock 10810 that
differ from the components of articulation lock 810 and/or
articulation lock 350 for example and which may be necessary to
understand the operation of articulation lock 10810 will be
discussed in further detail below. As noted above, further details
regarding articulation lock 350 may be found in U.S. patent
application Ser. No. 13/803,086, entitled ARTICULATABLE SURGICAL
INSTRUMENT COMPRISING AN ARTICULATION LOCK, now U.S. Patent
Application Publication No. 2014/0263541, the entire disclosure of
which was incorporated by reference herein. The articulation lock
10810 can be configured and operated to selectively lock the
surgical end effector 10300 in various articulated positions. Such
arrangement enables the surgical end effector 10300 to be rotated,
or articulated, relative to the shaft closure sleeve 260 when the
articulation lock 10810 is in its unlocked state.
[0418] Referring specifically to FIGS. 96 and 97, the elongate
shaft assembly 10200 includes a spine 210 that is configured to,
one, slidably support a firing member 220 therein and, two,
slidably support the closure sleeve 260 which extends around the
spine 210. The spine 210 also slidably supports a proximal
articulation driver 230. The proximal articulation driver 230 has a
distal end 231 that is configured to operably engage the
articulation lock 10810. The articulation lock 10810 further
comprises a shaft frame 10812 that is attached to the spine 210 in
the various manners disclosed herein. As shown in FIG. 97, the
shaft frame 10812 is configured to movably support a proximal
portion 10821 of a distal articulation driver 10820 therein. The
distal articulation driver 10820 is movably supported within the
elongate shaft assembly 10200 for selective longitudinal travel in
a distal direction DD and a proximal direction PD in response to
articulation control motions applied thereto.
[0419] One feature that many clinicians may be concerned with
during the performance of a surgical procedure is the net length of
the articulatable end effector from its pivot point. This dimension
impacts upon the amount of access that the end effector can achieve
in the confined space within the patient. The surgical instrument
10010 may be configured to address this issue. In the illustrated
arrangement, for example, the shaft frame 10812 includes a distal
end portion 10814 that has a pivot pin 10818 formed thereon. The
pivot pin 10818 is adapted to be pivotally received within a slot
10395 formed in an end effector mounting assembly 10390 that is
attached to the proximal end 10303 of the elongate channel 10302 by
a spring pin 10393 or other suitable member. The pivot pin 10818
defines an articulation axis B-B that is transverse to the shaft
axis SA-SA. Such arrangement facilitates pivotal travel (i.e.,
articulation) of the end effector 10300 about the articulation axis
B-B relative to the shaft frame 10812 as well as axial or
translational travel of the elongate channel 10302 relative to a
point of reference one shaft frame 10812, for example the
articulation axis B-B. As can be seen in FIGS. 99 and 100, the
articulation system 10800 further includes an articulation drive
gear 10840 that is rotatably supported on a shaft 10842 that is
formed on or otherwise attached to the shaft frame 10812. As can be
further seen in FIGS. 99 and 100, the end effector mounting
assembly 10390 has an articulation gear profile 10396 formed
thereon that is configured for meshing engagement with the
articulation drive gear 10840. As can be most particularly seen in
FIGS. 97 and 101-103, a drive pin 10844 protrudes from the
articulation drive gear 10840. The drive pin 10844 is received
within a slot 10822 in the distal articulation driver 10820. Thus,
movement of the distal articulation driver 10820 in the proximal
direction PD (in the various manners discussed herein) will cause
the articulation drive gear 10840 to rotate in the counter
clockwise direction (arrow CCW in FIG. 103) which, in turn, will
articulate the surgical end effector 10300 in the direction
represented by arrow 10848. Likewise, movement of the distal
articulation driver 10820 in the distal direction DD will cause the
articulation drive gear 10840 to rotate in the clockwise direction
(arrow CW in FIG. 102) which will articulate the surgical end
effector 10300 in the direction represented by arrow 10849.
[0420] Still referring to FIGS. 99-105, in at least one
arrangement, the articulation gear profile 10396 is elliptical in
shape. The elliptical configuration of the articulation gear
profile 10396, in connection with the slot 10395, allows for the
end effector 10300 to translate (or move axially) as it is being
rotated or articulated. The eccentricity of the elliptical
articulation gear profile 10396 allows for the "center-to-center"
distance between the articulation drive gear 10840 and the gear
profile 10396 to be reduced and then converts that reduction into
translation of the end effector 10300. FIGS. 101 and 103 illustrate
the surgical end effector 10300 in an unarticulated position.
Stated another way, the end effector axis EA that is defined by the
elongate channel 10302 is aligned with the shaft axis SA-SA. As
used in this context, the term "aligned with" may mean "coaxially
aligned" with the shaft axis SA-SA or simply parallel with the
shaft axis SA-SA. When in that unarticulated position, the elongate
channel 10302 occupies a certain amount of space (i.e., which may
be referred to as a "footprint"). Stated another way, a distal end
10309 of the elongate channel 10302 is located a first distance D1
(which may also be referred to herein as an "unarticulated
distance") from the articulation axis B-B which is defined by the
pin 10818. See FIG. 104. When the surgical end effector 10300 is
articulated, the elongate channel 10302 translates proximally
(arrow TL in FIGS. 102 and 103) relative to the shaft frame 10812
and more particularly relative to the articulation axis B-B so that
the distance D2 between the distal end 10309 of the elongate
channel 10302 and the articulation axis B-B (which may also be
referred to herein as an "articulated distance") is less than the
distance D1. See FIG. 105. This reduced overall length of the
surgical end effector 10300 allows for greater access when the end
effector 10300 is in an articulated position and will maintain the
same net length when straight. Stated another way, as the end
effector is articulated, the distance between the first staples in
the end effector and the articulation axis will decrease to thereby
reduce the end effector's footprint while being in an articulated
configuration.
[0421] The surgical end effector 10300 of the embodiment
illustrated in FIGS. 96-105 comprises a surgical cutting and
stapling device that employs a firing beam 220 of the various types
and configurations described herein. However, the surgical end
effector 10300 of this embodiment may comprise other forms of
surgical end effectors that do not cut and/or staple tissue. In the
illustrated arrangement, a middle support member 10950 is pivotally
and slidably supported relative to the shaft frame 10812. As can be
seen in FIG. 98, the middle support member 10950 includes a slot
10952 that is adapted to receive therein a pin 10954 that protrudes
from or is attached to or is formed in the spine 210. Such
arrangement enables the middle support member 10950 to pivot and
translate relative to the pin 10954 when the surgical end effector
10300 is articulated. The middle support member 10950 further
includes a slot 10960 for receiving a firing beam 220 therethrough.
The middle support member 10950 serves to provide lateral support
to the firing beam 220 as it flexes to accommodate articulation of
the surgical end effector 10300.
[0422] FIGS. 106-108 illustrate portions of another surgical
instrument 11010 that includes a surgical end effector 11300 that
operably interfaces with an elongate shaft assembly 11200 that may
employ many of the features of the various shaft assemblies
disclosed herein. The surgical end effector 11300 may essentially
comprise any of the various end effectors described herein or it
may comprise other forms of surgical end effectors that are
configured to perform other surgical actions/procedures. In the
illustrated arrangement, for example, the surgical end effector
11300 includes an elongate channel 11302 that may be adapted to
support a surgical staple cartridge therein, for example. The
elongate shaft assembly 11200 may comprise a spine 11210 that is
pivotally coupled to the elongate channel 11302 by an articulation
joint 11270. In the illustrated arrangement, the elongate channel
11302 of the surgical end effector 11300 is coupled to the spine
11210 by an articulation pin 11818 that is movably received in an
elongate articulation slot 11395 formed in the elongate channel
11302 or in an end effector mounting assembly (not shown). The pin
and slot arrangement facilitates pivotal and translational travel
of the elongate channel 11302 relative to spine 11210 of the
elongate shaft assembly 11200. The articulation pin 11818 defines
an articulation axis B-B that extends through the center of the pin
11818 and would come out of the page in FIGS. 106-108 such that it
its transverse to the shaft axis SA-SA. The spine 11210 may
otherwise be similar to spine 210 described above and support a
firing member and closure sleeve arrangements as described herein
and which are not specifically illustrated in FIGS. 106-108 for the
purpose of clarity.
[0423] In the illustrated example, the elongate shaft assembly
11200 includes articulation system designated as 11800 that may
include an articulation lock that is similar to articulation locks
350, 810 and/or 10810 described above and which may be actuated in
any of the various manners described herein. The articulation
system 11800 includes a distal articulation driver 11820 that may
comprise a portion of the articulation lock (not shown) or may
otherwise simply interface with an articulation control system that
is constructed to selective move the distal articulation driver
11820 in distal and proximal directions to articulate the surgical
end effector 11300. The articulation system 11800 further includes
a central articulation link 11900 that is rotatably journaled on
the articulation pin 11818 for rotation about the articulation axis
B-B. In the illustrated arrangement, the central articulation link
11900 has a triangular shape that defines three end portions 11902,
11904, 11906. The articulation system 11800 in the illustrated
embodiment further includes a driver link 11910 that is pivotally
coupled to an end of the distal articulation driver 11820 as well
as to end 11902 of the central articulation link 11900. As will be
discussed in further detail below, movement of the distal
articulation driver 11820 in the proximal and distal directions
will cause the central articulation link 11900 to rotate or pivot
about the articulation axis B-B.
[0424] The articulation system 11800 further includes an end
effector driver link 11920 that has a first end 11922 that is
pivotally coupled to the elongate channel 11302. A second end 11924
of the end effector driver link 11920 is pivotally coupled to the
end 11904 of the central articulation link 11900. The point at
which the driver link 11910 is attached to the central articulation
link 11900 and the point at which the second end 11924 of the end
effector driver link 11920 is attached to the central articulation
link 11900 may lie along a common axis OAS, but that axis is offset
from the articulation axis B-B. See FIG. 106. The second end 11924
of the end effector driver link 11920 has a gear profile 11926
thereon that is configured for meshing engagement with a central
articulation gear 11930 that is rotatably journaled on the
articulation pin 11818. When the distal articulation driver 11820
is moved in the distal direction DD, central articulation link
11900 moves the second end 11924 of the end effector driver link
11920 in a clockwise direction CW while maintaining in meshing
engagement with the central articulation gear 11930. Movement of
the articulation driver link 11920 in the clockwise direction also
moves the surgical end effector 11300 in the clockwise direction
about the articulation axis B-B relative to the elongate shaft
assembly 11200. See FIG. 107. Similarly, movement of the distal
articulation driver 11820 in the proximal direction will move the
central articulation link 11900 in the counter clockwise CCW
direction. Such movement of the central articulation link 11900
also causes the second end 11924 to move in the counterclockwise
direction CCW while maintaining in meshing engagement with the
central articulation gear 11930. Movement of the articulation
driver link 11920 in the counterclockwise direction causes the
surgical end effector 11300 to pivot about the articulation axis
B-B in the counterclockwise direction relative to the elongate
shaft assembly 11200. See FIG. 108.
[0425] FIG. 106 illustrates the surgical end effector 11300 in an
unarticulated position relative to the elongate shaft assembly
11200. When in that unarticulated position, the end effector axis
EA of the elongate channel 11302 is essentially aligned with the
shaft axis SA-SA. Stated another way, the end effector axis EA
defined by the elongate channel 10302 is aligned with the shaft
axis SA-SA. As used in this context, the term "aligned with" may
mean "coaxially aligned" with the shaft axis SA-SA or simply
parallel with the shaft axis SA-SA. FIG. 107 illustrates the
position of the surgical end effector 11300 after it has been moved
in the clockwise direction to a fully articulated position relative
to the elongate shaft assembly 11200 wherein an angle 11950 between
the end effector axis EA and the shaft axis SA-SA is approximately
ninety degrees (90.degree.). FIG. 108 illustrates the position of
the surgical end effector 11300 after it has been moved in the
counterclockwise direction to a fully articulated position relative
to the elongate shaft assembly 11200 wherein an angle 11950 between
the end effector axis EA and the shaft axis SA-SA is approximately
ninety degrees (90.degree.). As can also be seen in FIGS. 107 and
108, the distal end 11201 of the elongate shaft assembly 11200 is
notched on both sides of the shaft axis SA to permit the elongate
channel 11302 to translate in a direction toward the shaft axis
SA-SA (represented by arrows TD in FIGS. 107 and 108) to
effectively shorten the distance between the distal end of the
elongate channel 11302 and the articulation axis B-B. Such
arrangement may represent a vast improvement over prior
articulation joint arrangements that cannot afford articulation of
the end effector to positions that are ninety degrees (90.degree.)
relative to the shaft axis (through a 180 degree path that is
transverse to the shaft axis. This embodiment also effectively
reduces the footprint of the end effector when articulated by
allowing the end effector to translate toward the shaft axis while
being articulated.
[0426] Referring to FIG. 106, it can be observed that the driver
link 11910 is coupled to the first end of the central articulation
link 11900 at a location located on one side of the shaft axis and
the second end 11924 of the end effector driver link 11920 is
attached to end 11904 of the central articulation link 11900 at a
location that is on the opposite side of the shaft axis when the
end effector 11300 is in the unarticulated position. The central
articulation gear arrangement serves to minimize the backlash and
serves to transmit such forces into the articulation pin 11818
which may increase the overall strength of the articulation joint
when compared to other articulation joint arrangements of similar
sizes. The ability to articulate the surgical end effector relative
to the shaft to which it is attached at relative high angles is
often desirable when performing various surgical procedures where
transections need to happen in a constrained space and access to
targeted soft tissue can be difficult such as in the thoracic
cavity or the pelvic bowl. Prior end effectors suffer from the
inability to articulate to angles that are greater than forty-five
degrees (45.degree.) relative to the shaft axis. The
above-described embodiment may overcome these deficiencies.
[0427] FIGS. 109-111 illustrate portions of another surgical
instrument 12010 that includes a surgical end effector 12300 that
operably interfaces with an elongate shaft assembly 12200 that may
employ many of the features of the various shaft assemblies
disclosed herein. The surgical end effector 12300 may essentially
comprise any of the various end effectors described herein or it
may comprise other forms of surgical end effectors that are
configured to perform other surgical actions/procedures. In the
illustrated arrangement, for example, the surgical end effector
12300 includes an elongate channel 12302 that may be adapted to
support a surgical staple cartridge therein, for example. The
elongate shaft assembly 12200 may comprise a spine 12210 that is
pivotally coupled to the elongate channel 12302 by an articulation
joint 12270. In the illustrated arrangement, the elongate channel
12302 of the surgical end effector 12300 is configured to extend
into a distal end portion 12213 of the spine 12210 and is operably
coupled thereto by an articulation system 12800.
[0428] In the illustrated example, the articulation system 12800
includes a distal articulation driver 12820 that is pivotally
coupled to the spine 12210 and the elongate channel 12302. As can
be seen in FIG. 109, the distal articulation driver 12820 is
configured to movably extend on a first side of the shaft axis
SA-SA. In addition, articulation system 12800 further includes a
second articulation link 12900 that is attached to the spine 12210
on a second side of the shaft axis SA. When the distal articulation
driver 12820 is moved in the distal direction DD, the elongate
channel 12302 is moved in the clockwise direction CW. During such
articulation, the proximal end 12303 of the elongate channel 12302
translates in the direction represented by arrow TD to reduce the
end effector footprint. See FIG. 110. Similarly, when the distal
articulation driver 12820 is moved in the proximal direction PD,
the elongate channel 12302 is pivoted in a counterclockwise CCW
direction. During such articulation, the proximal end of the
elongate channel 12302 translates in the direction represented by
the arrow TD to reduce the end effector footprint during
articulation.
[0429] FIG. 109 illustrates the surgical end effector 12300 in an
unarticulated position relative to the elongate shaft assembly
12200. When in that unarticulated position, the end effector axis
EA of the elongate channel 12302 is essentially aligned with the
shaft axis SA-SA. Stated another way, the end effector axis EA
defined by the elongate channel 10302 is aligned with the shaft
axis SA-SA. As used in this context, the term "aligned with" may
mean "coaxially aligned" with the shaft axis SA or simply parallel
with the shaft axis SA-SA. FIG. 110 illustrates the position of the
surgical end effector 12300 after it has been moved in the
clockwise CW direction to a fully articulated position relative to
the elongate shaft assembly 12200. FIG. 111 illustrates the
position of the surgical end effector 12300 after it has been moved
in the counterclockwise direction to a fully articulated position
relative to the elongate shaft assembly 12200.
[0430] The ability to articulate the surgical end effector relative
to the shaft to which it is attached at relative high angles is
often desirable when performing various surgical procedures where
transections need to happen in a constrained space and access to
targeted soft tissue can be difficult such as in the thoracic
cavity or the pelvic bowl. However, in prior end effectors, the
larger articulation angles typically results in a larger moment
around the articulation system that may more easily bend or break
the mechanism. The embodiment depicted in FIGS. 112-114 includes
features that may address those shortcomings of prior articulatable
end effectors. FIGS. 112-114 illustrate portions of another
surgical instrument 13010 that includes a surgical end effector
13300 that operably interfaces with an elongate shaft assembly
13200 that may employ many of the features of the various shaft
assemblies disclosed herein. The elongate shaft assembly 13200
defines a shaft axis SA-SA. In addition, the surgical end effector
13300 may essentially comprise any of the various end effectors
described herein or it may comprise other forms of surgical end
effectors that are configured to perform other surgical
actions/procedures. In the illustrated arrangement, for example,
the surgical end effector 13300 includes an elongate channel 13302
that may be adapted to support a surgical staple cartridge therein,
for example. The elongate channel 13302 defines an end effector
axis EA. The elongate shaft assembly 13200 may comprise a spine
13210 that is pivotally coupled to the elongate channel 13302 by an
articulation joint 13270. In the illustrated arrangement, the
elongate channel 13302 of the surgical end effector 13300 is
coupled to the spine 13210 by an articulation pin 13818 that
defines an articulation axis B-B that that is transverse to the
shaft axis SA-SA. In FIGS. 112-114, the articulation axis B-B may
coincide with the center axis of the articulation pin 13818, for
example, and would essentially protrude out of the page in each of
those Figures. The spine 13210 may otherwise be similar to spine
210 described above and support a firing member and closure sleeve
arrangements as described herein and which are not specifically
illustrated in FIGS. 112-114 for the purpose of clarity.
[0431] In the illustrated example, the elongate shaft assembly
13200 includes articulation system designated as 13800 that may
include an articulation lock that is similar to articulation locks
350, 810 and/or 10810 described above and which may be actuated in
any of the various manners described herein. The articulation
system 13800 includes a distal articulation driver 13820 that may
comprise a portion of an articulation lock (not shown) or may
otherwise simply interface with an articulation control system that
is constructed to selectively move the distal articulation driver
13820 in distal and proximal directions to articulate the surgical
end effector 13300 about the articulation axis B-B. The
articulation system 13800 further includes a central articulation
link 13900 that is rotatably journaled on the articulation pin
13818 for rotation about the articulation axis B-B relative to a
distal end of the elongate shaft assembly 13200. In the illustrated
arrangement, the central articulation link 13900 has a triangular
shape and defines three end portions 13902, 13904, 13906. The
articulation system 13800 in the illustrated embodiment further
includes an intermediate driver link 13910 that is pivotally
coupled to an end of the distal articulation driver 13820 as well
as to end 13902 of the central articulation link 13900. As will be
discussed in further detail below, movement of the distal
articulation driver 13820 in the proximal and distal directions
will cause the central articulation link 13900 to rotate about the
articulation axis B-B.
[0432] The articulation system 13800 further includes an end
effector driver link 13920 that has a first or distal driver link
end 13922 that has a slot 13923 therein. An end effector attachment
member or pin 13960 is attached to the end effector 13300 and is
received in the slot 13923. Such arrangement facilitates pivotal
and translatable or axial travel (represented by arrow AT) of the
pin 13960 within the slot 13923. A second or proximal driver link
end 13924 of the end effector driver link 13920 is pivotally
coupled to the end 13904 of the central articulation link 13900.
The point at which the intermediate driver link 13910 is attached
to the central articulation link 13900 and the point at which the
second end 13924 of the end effector driver link 13920 is attached
to the central articulation link 13900 may lie along a common axis
OAS, but that axis is offset from the articulation axis B-B. See
FIG. 112. The second end 13924 of the end effector driver link
13920 has a gear profile 13926 thereon that is configured for
meshing engagement with a gear profile 13930 formed on or otherwise
attached to the spine 13210. When the distal articulation driver
13820 is moved in the proximal direction PD, central articulation
link 13900 causes the end effector 13300 to move in a
counterclockwise direction CCW about the articulation axis B-B
relative to the distal end of the elongate shaft assembly 13200.
During such movement, the second end 11924 of the end effector
driver link 13920 remains in meshing engagement with the gear
profile 13930. Depending upon the amount of proximal travel of the
distal articulation driver 13820, the surgical end effector 13300
may be pivoted to the articulation position shown in FIG. 113
wherein the end effector axis EA is perpendicular to the shaft axis
SA-SA (represented by angle 13950 in FIG. 113). Similarly, movement
of the distal articulation driver 11820 in the distal direction DD
will cause the end effector 13300 to move in a clockwise direction
CW about the articulation axis B-B relative to the distal end of
the elongate shaft assembly 13200. During such movement, the second
end 11924 of the end effector driver link 13920 remains in meshing
engagement with the gear profile 13930. Depending upon the amount
of distal travel of the distal articulation driver 13820, the
surgical end effector 13300 may be pivoted to the articulation
position shown in FIG. 114 wherein the end effector axis EA is
perpendicular to the shaft axis SA-SA (represented by angle 13952
in FIG. 114).
[0433] As can be seen in FIG. 112, when in an unarticulated
position, the end effector axis EA is in axial alignment with the
shaft axis SA. In addition, as can be further seen in FIGS.
112-114, the distal articulation driver 13820, as well as the
intermediate driver 13910, are each supported for selective
longitudinal travel along one lateral side of the shaft axis SA and
the end effector attachment pin 13960 is located on a secondary
lateral side of the end effector axis EA that corresponds to a
second lateral side of the shaft axis SA. Alternative embodiments
may employ other means for applying an articulation control motion
to the central articulation link 13900. For example, a cable
arrangement may be directly attached to the central articulation
link in place of the distal articulation driver 13820 and 13910. In
such arrangement, the central articulation link would be pivoted
when a corresponding articulation system located in the handle or
housing of the instrument tensions or pulls the cable. In still
other alternative embodiments, the distal articulation driver 13820
is directly coupled to the central articulation link 13900. In such
arrangement, for example, the central articulation link 13900 may
include a slot instead of a pin at this connection to enable
rotation of the articulation axis B-B. In yet another embodiment,
the slot 13923 in the end effector drive link 13920 may be replaced
by a pin connection. To achieve articulation of the surgical end
effector 13300 about articulation axis B-B, the gear profile 13926
on the end effector driver link 13920 is cam shaped so as to
maintain meshing engagement with the gear profile 13390 formed on
or otherwise attached to the spine 13210.
[0434] The embodiment of FIGS. 112-114 is more robust than prior
arrangements and provides a greater range of articulation when
compared to joint arrangements that cannot accommodate articulation
of the end effector to positions that are ninety degrees
(90.degree.) relative to the shaft axis (through a 180 degree path
that is transverse to the shaft axis). This embodiment may also
effectively reduce the footprint of the end effector when
articulated by allowing the end effector to translate toward the
shaft axis while being articulated. This greater range of
articulation may also be attained with articulation driver stroke
lengths that are generally less than the stroke lengths that are
normally required to articulate prior articulation joint
arrangements. The triangular-shaped central articulation link may
also provide several advantages. The triangular (three-point)
central articulation link connects the distal articulation driver
(through the intermediate drive link), the articulation pin and the
end effector driver link together. This triangular shaped central
link may provide improved resistance to forces that might cause the
end effector to undesirably de-articulate. Such triangular link
arrangement may also provide higher resistance to bending forces
that may be encountered by the articulation driver rod. Further,
such arrangement may also experience reduced backlash due to the
direct connection of the central articulation link to the spine
portion of the elongate shaft assembly. In the above-described
arrangement, a planetary gear rotates around a stationary gear
located on the distal end of the elongate shaft. A slotted driver
arm extends off the planetary gear and creates a moment that
articulates the end effector at higher angles for less articulation
driver stroke length. The slot allows for a second center of
rotation for the end effector. The triangular central articulation
link also reduces the buckling load or the articulation mechanism
and backlash of the system. A larger planetary gear results in more
mechanical advantage, but less articulation and vice versa for a
smaller planetary gear.
[0435] The ability to articulate the surgical end effector relative
to the shaft to which it is attached at relative high angles is
often desirable when performing various surgical procedures where
transections need to happen in a constrained space and access to
targeted soft tissue can be difficult such as in the thoracic
cavity or the pelvic bowl. Commercially available endocutters
typically are unable to articulate beyond angles of forty-five
degrees (45.degree.) relative to the elongate shaft. FIGS. 115-117
depict portions of another surgical instrument 14010 that is
capable of articulating ninety degrees (90.degree.) to both sides
of the elongate shaft and providing a higher mechanical advantage
than that is attainable with many commercially available endocutter
arrangements. As can be seen in those Figures, the surgical
instrument 14010 includes a surgical end effector 14300 that
operably interfaces with an elongate shaft assembly 14200 that may
employ many of the features of the various shaft assemblies
disclosed herein. The elongate shaft assembly 14200 defines a shaft
axis SA-S. In addition, the surgical end effector 14300 may
essentially comprise any of the various end effectors described
herein or it may comprise other forms of surgical end effectors
that are configured to perform other surgical actions/procedures.
In the illustrated arrangement, for example, the surgical end
effector 14300 includes an elongate channel 14302 that may be
adapted to support a surgical staple cartridge therein. The
elongate channel 14302 defines an end effector axis EA. The
elongate shaft assembly 14200 may comprise a spine 14210 that is
pivotally coupled to the elongate channel 14302 by an articulation
joint 14270. In the illustrated arrangement, the elongate channel
14302 of the surgical end effector 14300 is coupled to the spine
14210 by an articulation pin 14818 that defines an articulation
axis B-B that that is transverse to the shaft axis SA-SA. In FIGS.
115-117, the articulation axis B-B may coincide with the center
axis of the articulation pin 14818, for example, and would
essentially protrude out of the page in each of those Figures. The
spine 14210 may otherwise be similar to spine 210 described above
and support a firing member and closure sleeve arrangements as
described herein and which are not specifically illustrated in
FIGS. 115-117 for the purpose of clarity.
[0436] In the illustrated example, the elongate shaft assembly
14200 includes articulation system designated as 14800 that may
include an articulation lock that is similar to articulation locks
350, 810 and/or 10810 described above and which may be actuated in
any of the various manners described herein. The articulation
system 14800 includes a distal articulation driver 14820 that may
comprise a portion of an articulation lock (not shown) or may
otherwise simply interface with an articulation control system that
is constructed to selectively move the distal articulation driver
14820 in distal and proximal directions to articulate the surgical
end effector 14300 about the articulation axis B-B. The
articulation system 14800 further includes a central link 14900
that is pivotally attached to the spine 14210 by a link pin 14902.
In the illustrated arrangement, the link pin 14901 defines a link
axis LA about which the central link 14900 may pivot which is
offset from the articulation axis B-B. In FIGS. 115-117, the link
axis LA may coincide with the center axis of the link pin 14901,
for example, and would essentially protrude out of the page in each
of those Figures and be offset from and parallel with the
articulation axis B-B. As can be further seen in those Figures, in
the illustrated arrangement, the central articulation link 14900 is
pivotally coupled to the spine 14210 in an asymmetric
configuration. More specifically, a first distance between a first
end 14902 of the central articulation link 14900 and the link axis
LA is less than a second distance between a second end 14904 of the
central articulation link 14900 and the link axis LA.
[0437] The articulation system 14800 in the illustrated embodiment
further includes an intermediate driver link 14910 that is
pivotally coupled to an end of the distal articulation driver 14820
as well as to the first end 14902 of the central articulation link
14900. The articulation system 14800 also includes an end effector
driver link 14920 that has a first or distal driver link end 14922
that is pivotally or movably coupled to the elongate channel 14302.
A second or proximal driver link end 14924 of the end effector
driver link 14920 is pivotally coupled to a second end 14904 of the
central articulation link 14900. In the illustrated arrangement,
the intermediate link 14910 is the shortest of the three links
14910, 14900 and 14920 and, in at least one arrangement, has a
slight arcuate shape. The end effector driver link 14920 is the
longest of the three links 14910, 14900 and 14920 and, in at least
one arrangement, also has a slight arcuate shape. When the distal
articulation driver 14820 is moved in the distal direction DD, the
central articulation link 14900 causes the end effector driver link
14920 to pull the end effector 14300 in the clockwise direction CW
about the articulation axis B-B relative to the distal end of the
elongate shaft assembly 14200. See FIG. 116. Depending upon the
amount of proximal travel of the distal articulation driver 14820,
the surgical end effector 14300 may be pivoted to the articulation
position shown in FIG. 116 wherein the end effector axis EA is
perpendicular to the shaft axis SA-SA (represented by angle 14950
in FIG. 116). Similarly, movement of the distal articulation driver
14820 in the proximal direction PD will cause the end effector
driver link 14920 to push the end effector 14300 in a
counterclockwise direction CCW about the articulation axis B-B
relative to the distal end of the elongate shaft assembly 14200.
See FIG. 117. Depending upon the amount of distal travel of the
distal articulation driver 14820, the surgical end effector 14300
may be pivoted to the articulation position shown in FIG. 117
wherein the end effector axis EA is perpendicular to the shaft axis
SA-SA (represented by angle 14952 in FIG. 117).
[0438] As can be seen in FIG. 115, when in an unarticulated
position, the end effector axis EA is in axial alignment with the
shaft axis SA-SA. As used in this context, the term "aligned with"
may mean "coaxially aligned" with the shaft axis SA-SA or simply
parallel with the shaft axis SA-SA. The embodiment of FIGS. 115-117
is more robust than prior arrangements and provides a greater range
of articulation when compared to joint arrangements that cannot
afford articulation of the end effector to positions that are
ninety degrees (90.degree.) relative to the shaft axis (through a
180 degree path that is transverse to the shaft axis). This
embodiment may also effectively reduce the footprint of the end
effector 14300 when articulated by allowing the end effector 14300
to translate toward the shaft axis SA-SA while being articulated.
This greater range of articulation may also be attained while
providing a higher amount of resistance to bending forces. The
second point of attachment (link pin 14901) to the spine 14210 of
the elongate shaft assembly 14200 may reduce the amount of backlash
experienced by the articulation joint 14270. The articulation joint
arrangement of FIGS. 115-117 may also provide a high amount of
mechanical advantage relative to the amount of force required to
articulate the end effector 14300. Further, a high amount of
mechanical advantage may be obtained during de-articulation when
the asymmetric central link 14900 is rotated one hundred eighty
degrees (180.degree.). The end effector driver link 14920
translates forward and backward in order to articulate the end
effector 14300 about the articulation axis B-B. The proximal end
14912 of the smallest link (intermediate link 14910) translates
back and forth with the distal articulation driver 14820 as the
distal end 14914 of the small link (intermediate link 14910)
rotates about its proximal end (point of attachment to the distal
articulation driver). As the distal end 14914 of the small link
14910 pivots, a lever effect is created on the central (grounded)
link 14900 which produces an articulation force mechanical
advantage while reducing the backlash experienced by the
articulation system. The central (grounded) link 14900 pivots about
its pinned position (pin 14901) to push/pull the longest link (end
effector driver 14920). The longest link 14920 then pivots to
articulate the end effector 14300.
[0439] As indicated above, the ability to articulate the surgical
end effector relative to the shaft to which it is attached at
relative high angles is often desirable when performing various
surgical procedures where transections need to happen in a
constrained space and access to targeted soft tissue can be
difficult such as in the thoracic cavity or the pelvic bowl.
Commercially available endocutters typically are unable to
articulate beyond angles of forty-five degrees (45.degree.)
relative to the elongate shaft. FIGS. 118 and 119 depict portions
of another surgical instrument 15010 that is capable of
articulating ninety degrees (90.degree.) to one side of the
elongate shaft while providing a higher mechanical advantage than
that is typically attainable with many commercially available
endocutter arrangements. As can be seen in those Figures, the
surgical instrument 15010 includes a surgical end effector 15300
that operably interfaces with an elongate shaft assembly 15200 that
may employ many of the features of the various shaft assemblies
disclosed herein. The elongate shaft assembly 15200 defines a shaft
axis SA-SA. In addition, the surgical end effector 15300 may
essentially comprise any of the various end effectors described
herein or it may comprise other forms of surgical end effectors
that are configured to perform other surgical actions/procedures.
In the illustrated arrangement, for example, the surgical end
effector 15300 includes an elongate channel 15302 that may be
adapted to support a surgical staple cartridge therein. In other
end effector embodiments that are not specifically constructed to
cut and staple tissue, element 15302 may comprise a jaw or other
portion of the end effector. The elongate channel 15302 defines an
end effector axis EA. The elongate shaft assembly 15200 may
comprise a spine 15210 that is pivotally coupled to the elongate
channel 15302 by an articulation joint 15270. In the illustrated
arrangement, the elongate channel 15302 of the surgical end
effector 15300 is coupled to the spine 15210 by an articulation pin
15818 that defines an articulation axis B-B that that is transverse
to the shaft axis SA-SA. In FIGS. 118 and 119, the articulation
axis B-B may coincide with the center axis of the articulation pin
15818, for example, and would essentially protrude out of the page
in each of those Figures. As can also be seen in those Figures, in
the illustrated arrangement, the articulation axis B-B is offset to
one lateral side of the shaft axis SA-SA. Stated another way, the
articulation axis B-B does not intersect the shaft axis SA-SA or
the end effector axis EA. The spine 15210 may otherwise be similar
to spine 210 described above and support a firing member and
closure sleeve arrangements as described herein and which are not
specifically illustrated in FIGS. 118-119 for the purpose of
clarity.
[0440] In the illustrated example, the elongate shaft assembly
15200 includes articulation system designated as 15800 that may
include an articulation lock that is similar to articulation locks
350, 810 and/or 10810 described above and which may be actuated in
any of the various manners described herein. The articulation
system 15800 includes a distal articulation driver 15820 that may
comprise a portion of an articulation lock (not shown) or may
otherwise simply interface with an articulation control system that
is constructed to selectively move the distal articulation driver
15820 in distal and proximal directions to articulate the surgical
end effector 15300 about the articulation axis B-B. The
articulation system 15800 further includes an end effector link
15900 that is pivotally attached to the distal end of the distal
articulation driver 15820 as well as the elongate channel 15302 of
the surgical end effector 15300. Thus, when the distal articulation
driver 15820 is moved in the proximal direction PD, the surgical
end effector 15300 is pivoted in the counterclockwise CCW direction
about the articulation axis B-B.
[0441] As can be seen in FIG. 118, when in an unarticulated
position, the end effector axis EA is in axial alignment with the
shaft axis SA. As used in this context, the term "aligned with" may
mean "coaxially aligned" with the shaft axis SA-SA or simply
parallel with the shaft axis SA-SA. Advancement of the distal
articulation driver 15820 in the proximal direction PD will cause
the surgical end effector 15300 to pivot about the articulation
axis B-B in the counterclockwise direction. The proximal end 15305
of the elongate channel 15302 and the distal end 15211 of the spine
15210 are angled to enable the surgical end effector 15300 to pivot
to a fully articulated position wherein, for example, the end
effector axis EA is perpendicular to the shaft axis SA (angle 15952
is ninety degrees)) (90.degree.)). See FIG. 119. In one
arrangement, the proximal end 15305 of the surgical end effector
15300 is oriented relative to said end effector axis EA at an end
effector angle 15307 and the distal end 15211 of the elongate shaft
assembly 15200 is oriented relative to the shaft axis SA-SA at a
shaft angle 15213. In one arrangement, the end effector angle 15307
is equal to the shaft angle 15213. For example, the end effector
angle 15307 and the shaft angle 15213 may both be approximately
forty-five degrees (45.degree.).
[0442] The embodiment of FIGS. 118 and 119 also includes a flexible
de-articulation member 15910 that may be attached to a portion of
the surgical instrument that is configured to selectively only
apply a pulling motion in the proximal direction PD to the
de-articulation member. As can be seen in FIG. 119, the
de-articulation member 15910 is oriented to flex around the
articulation pin 15818 during articulation of the surgical end
effector 15300. In an alternative arrangement, the de-articulation
member is elastic and is attached to the spine 15210 or other
portion of the surgical instrument 15010 at a location that is
proximal to the articulation joint 15270 as well as to the proximal
end 15305 of the elongate channel 15302 or other portion of the
surgical end effector 15300. The flexible de-articulation member
may be fabricated from, for example, spring tempered stainless
steel, plastic material, Nylon, etc. and be formed into flat bands
or cables so as to help de-articulate the surgical end effector
15300 from an articulated position back to the unarticulated
position. Once the clinician desires to return the surgical end
effector 15300 to the unarticulated orientation, the distal
articulation driver 15820 is moved in the distal direction DD,
which will start to move the surgical end effector in a clockwise
CW direction and the de-articulation member 15910 is pulled in the
proximal direction PD. The de-articulation member 15910 also serves
to help pull the surgical end effector in the clockwise CW
direction back to the unarticulated position.
[0443] The embodiment of FIGS. 118 and 119 may have several
advantages over other commercially available articulatable surgical
instruments. Such arrangement, for example, may experience lower
backlash during articulation due to the minimal number of links.
Such arrangement also affords an increased articulation angle over
prior designs. As indicated above, the surgical end effector may
comprise a surgical stapling arrangement of the various types
described herein. Such arrangements employ an axially movable
firing member or firing bar or beam that experiences a certain
amount of flexure when the end effector is articulated. The
embodiment of FIGS. 118 and 119 may provide an improved radius of
curvature for the firing member due to the non-symmetric
articulation. Stated another way, the distal articulation driver
15820 as well as the end effector link 15910 are located to one
side of the shaft axis SA-SA, which provides more clearance for
attaining a more gradual flexure of the firing member during
articulation. Such offset articulation axis arrangement which
affords articulation in a single articulation direction that is
transverse to the shaft axis may also be referred to herein as a
"non-symmetrical" articulation arrangement or system that can
facilitate relatively high articulation angles. Also, in this
embodiment, the articulation axis B-B is laterally offset from the
shaft axis. In such embodiment, the distance between the point of
intersection of the shaft axis and the end effector axis to the
distal end of the end effector is shorter when the device is in an
articulated state verses when it is in an unarticulated state.
[0444] FIGS. 120-122 depict portions of another articulatable
surgical instrument 16010 that includes a surgical end effector
16300 that operably interfaces with an elongate shaft assembly
16200 that may employ many of the features of the various shaft
assemblies disclosed herein. The elongate shaft assembly 16200
defines a shaft axis SA-SA. In addition, the surgical end effector
16300 may essentially comprise any of the various end effectors
described herein or it may comprise other forms of surgical end
effectors that are configured to perform other surgical
actions/procedures. In the illustrated arrangement, for example,
the surgical end effector 16300 includes an elongate channel 16302
that may be adapted to support a surgical staple cartridge therein,
for example. In other end effector embodiments that are not
specifically constructed to cut and staple tissue, element 16302
may comprise a jaw or other portion of the end effector. The
elongate channel 16302 defines an end effector axis EA. The
elongate shaft assembly 16200 may comprise a spine 16210 that is
pivotally coupled to the elongate channel 16302 by an articulation
joint 16270. In the illustrated arrangement, the elongate channel
16302 of the surgical end effector 16300 includes a proximally
protruding attachment arm 16309 that is coupled to the spine 16210
by a spring pin 16818 that defines an articulation axis B-B. The
articulation axis B-B is transverse to the shaft axis SA-SA. In
FIGS. 121 and 122, the articulation axis B-B may coincide with the
center axis of the spring pin 16818, for example, and would
essentially protrude out of the page in each of those Figures. As
can also be seen in those Figures, in the illustrated arrangement,
the articulation axis B-B is offset to one lateral side of the
shaft axis SA-SA. Stated another way, the articulation axis B-B
does not intersect the shaft axis SA-SA or the end effector axis
EA. The spine 16210 may otherwise be similar to spine 210 described
above and support a firing member and closure sleeve arrangements
as described herein and which are not specifically illustrated in
FIGS. 120-122 for the purpose of clarity. The spring pin 16818 is
configured to apply a biasing force to the attachment arm 16309 to
bias the attachment arm 16309 as well as the surgical end effector
16300 in the clockwise direction CW. Thus, the spring pin 16818
serves to bias the surgical end effector 16300 into the
unarticulated position shown in FIG. 121 wherein the end effector
axis EA and the shaft axis SA-SA are axially aligned. As used in
this context, the term "aligned with" may mean "coaxially aligned"
with the shaft axis SA-SA or simply parallel with the shaft axis
SA-SA.
[0445] In the illustrated example, the elongate shaft assembly
16200 also includes an articulation system designated as 16800 that
may include an articulation lock that is similar to articulation
locks 350, 810 and/or 10810 described above and which may be
actuated in any of the various manners described herein. The
articulation system 16800 includes a distal articulation driver
16820 that may comprise a portion of an articulation lock (not
shown) or may otherwise simply interface with an articulation
control system that is constructed to selectively move the distal
articulation driver 16820 in distal and proximal directions to
articulate the surgical end effector 16300 about the articulation
axis B-B. The distal articulation driver 16820 is pivotally pinned
to the proximal end 16305 of the elongate channel 16302. As can be
seen in FIG. 121, the distal articulation driver 16820 is pinned to
the elongate channel 16302 at a location that is on one side of the
shaft axis SA-SA and end effector axis EA. The articulation axis
B-B is located on an opposite of the shaft axis from the point at
which the distal articulation driver is attached to the elongate
channel 16302. As can also be seen in FIG. 121, in the illustrated
arrangement, the point at which the distal articulation driver
16820 is attached to the elongate channel 16302 is distal to the
articulation axis B-B. When the distal articulation driver 15820 is
moved in the proximal direction, the surgical end effector 16300 is
pivoted in the counterclockwise CCW direction about the
articulation axis B-B.
[0446] As can be seen in FIG. 121, when in an unarticulated
position, the end effector axis EA is in axial alignment with the
shaft axis SA. As used in this context, the term "aligned with" may
mean "coaxially aligned" with the shaft axis SA-SA or simply
parallel with the shaft axis SA-SA Advancement of the distal
articulation driver 16820 in the proximal direction PD will cause
the surgical end effector 16300 to pivot about the articulation
axis B-B in the counterclockwise direction. Once the clinician
desires to return the surgical end effector 16300 to the
unarticulated orientation, the distal articulation driver 16820 is
moved in the distal direction DD, which will start to move the
surgical end effector 16300 in a clockwise CW direction. The spring
pin 16818 also serves to help pull the surgical end effector 16300
in the clockwise CW direction back to the unarticulated
position.
[0447] FIGS. 123-128 illustrate portions of another surgical
instrument 17010 that includes a surgical end effector 17300 that
operably interfaces with an elongate shaft assembly 17200 that
employs many of the features of the various shaft assemblies
disclosed herein. The surgical end effector 17300 may essentially
comprise any of the various end effectors described herein or it
may comprise other forms of surgical end effectors that are
configured to perform other surgical actions/procedures. In the
illustrated arrangement, for example, the surgical end effector
17300 is adapted to cut and staple tissue and includes a first jaw
in the form of an elongate channel 17302 that is configured to
operably support a surgical staple cartridge 17304 therein. See
FIGS. 123 and 124. The illustrated surgical end effector 17300
further includes a second jaw in the form of an anvil 17310 that is
supported on the elongate channel 17302 for movement relative
thereto. See FIG. 123. The anvil 17310 may be movably actuated by
one of the closure systems described herein. For example, a first
closure drive system may be employed to actuate a closure sleeve
260 in the manner described herein. The closure sleeve 260 is
attached to an end effector closure sleeve 272 that is pivotally
attached to the closure sleeve 260 by a double pivot closure sleeve
assembly 271 in any of the manners described herein. As was
described above, for example, axial movement of the closure sleeve
260 may be controlled through actuation of a closure trigger. As
the end effector closure sleeve 272 is advanced in the distal
direction DD, the anvil 17310 is cammed closed. In at least one
arrangement, a spring (not shown) may be employed to pivot the
anvil 17310 to an open position when the end effector closure
sleeve 272 is retracted back to a starting position.
[0448] As can be seen in FIGS. 123-128, the surgical end effector
17300 may be articulated relative to the elongate shaft assembly
17200 about an articulation joint 17270. In the illustrated
example, the elongate shaft assembly 17200 includes articulation
system designated as 17800 that employs an articulation lock 17810
that is similar to articulation locks 350, 810 and 10810 described
above. See FIGS. 124 and 125. Those components of articulation lock
17810 that differ from the components of articulation lock 810
and/or articulation lock 350 and or articulation lock 10810 for
example and which may be necessary to understand the operation of
articulation lock 17810 will be discussed in further detail below.
As noted above, further details regarding articulation lock 350 may
be found in U.S. patent application Ser. No. 13/803,086, entitled
ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN ARTICULATION LOCK,
now U.S. Patent Application Publication No. 2014/0263541, the
entire disclosure of which was incorporated by reference herein.
The articulation lock 17810 can be configured and operated to
selectively lock the surgical end effector 17300 in various
articulated positions. Such arrangement enables the surgical end
effector 17300 to be rotated, or articulated, relative to the shaft
closure sleeve 260 when the articulation lock 17810 is in its
unlocked state.
[0449] Referring specifically to FIG. 125, the elongate shaft
assembly 17200 includes a spine 210 that is configured to, one,
slidably support a firing member (not shown) therein and, two,
slidably support the closure sleeve 260 (FIG. 123) which extends
around the spine 210. The spine 210 also slidably supports a
proximal articulation driver 230. The proximal articulation driver
230 has a distal end 231 that is configured to operably engage the
articulation lock 17810. The articulation lock 17810 further
comprises a shaft frame 17812 that is attached to the spine 210 in
the various manners disclosed herein. The shaft frame 17812 is
configured to movably support a proximal portion 17821 of a distal
articulation driver 17820 therein. The distal articulation driver
17820 is movably supported within the elongate shaft assembly 17200
for selective longitudinal travel in a distal direction DD and a
proximal direction PD along an articulation actuation axis AAA that
is laterally offset and parallel to the shaft axis SA-SA in
response to articulation control motions applied thereto.
[0450] Still referring to FIGS. 124 and 125, in the illustrated
arrangement, the shaft frame 17812 includes a distal end portion
17814 that has a pivot pin 17818 formed thereon. The pivot pin
17818 is adapted to be pivotally received within a pivot hole 17397
formed in pivot base portion 17395 of an end effector mounting
assembly 17390. The end effector mounting assembly 17390 is
attached to the proximal end 17303 of the elongate channel 10302 by
a spring pin 17393 or other suitable member. The pivot pin 17818
defines an articulation axis B-B that is transverse to the shaft
axis SA-SA. Such arrangement facilitates pivotal travel (i.e.,
articulation) of the end effector 17300 about the articulation axis
B-B relative to the shaft frame 17812.
[0451] As can be seen in FIG. 125, a link pin 17825 is formed on a
distal end 17823 of the distal articulation link 17820 and is
configured to be received within a hole 17904 in a proximal end
17902 of a cross link 17900. The cross link 17900 extends
transversely across the shaft axis SA-SA and includes a distal end
portion 17906. A distal link hole 17908 is provided through the
distal end portion 17906 of the cross link 17900 and is configured
to pivotally receive therein a base pin 17398 extending from the
bottom of the pivot base portion 17395 of the end effector mounting
assembly 17390. The base pin 17395 defines a link axis LA that is
parallel to the articulation axis B-B. FIGS. 124 and 127 illustrate
the surgical end effector 17300 in an unarticulated position.
Stated another way, the end effector axis EA defined by the
elongate channel 17302 is aligned with the shaft axis SA-SA. As
used in this context, the term "aligned with" may mean "coaxially
aligned" with the shaft axis SA-SA or simply parallel with the
shaft axis SA-SA. Movement of the distal articulation driver 17820
in the proximal direction PD (in the various manners discussed
herein) will cause the cross link 17900 to draw the surgical end
effector 17300 in a clockwise CW direction about the articulation
axis B-B as shown in FIG. 126. Movement of the distal articulation
driver 17820 in the distal direction DD will cause the cross link
17900 to move the surgical end effector 17300 in the
counterclockwise CCW direction about the articulation axis B-B as
shown in FIG. 128. As can be seen in that Figure, the cross link
17900 has a curved shape that permits the cross-link 17900 to curve
around the articulation pin 17818 when the surgical end effector
17300 is articulated in that direction. When the surgical end
effector 17300 is in a fully articulated position on either side of
the shaft axis SA-SA, the articulation angle 17700 between the end
effector axis EA and the shaft axis SA-SA is approximately
sixty-five degrees (65.degree.). Thus, the range of articulation on
either said of the shaft axis is from one degree (1.degree.) to
sixty five degrees (65.degree.).
[0452] The surgical end effector 17300 of the embodiment
illustrated in FIGS. 123-128 comprises a surgical cutting and
stapling device that employs a firing beam 220 of the various types
and configurations described herein. However, the surgical end
effector 17300 of this embodiment may comprise other forms of
surgical end effectors that do not cut and/or staple tissue. In the
illustrated arrangement, a middle support member 17950 is pivotally
and slidably supported relative to the spine 210. As can be seen in
FIG. 125, the middle support member 17950 includes a slot 17952
that is adapted to receive therein a pin 17954 that protrudes from
the spine 210. Such arrangement enables the middle support member
17950 to pivot and translate relative to the pin 17954 when the
surgical end effector 17300 is articulated. A pivot pin 17958
protrudes from the underside of the middle support member 17950 to
be pivotally received within a corresponding pivot hole 17399
provided in the base portion 17395 of the end effector mounting
assembly 17390. The middle support member 17950 further includes a
slot 17960 for receiving a firing beam 220 therethrough. The middle
support member 17950 serves to provide lateral support to the
firing beam 220 as it flexes to accommodate articulation of the
surgical end effector 17300.
[0453] FIGS. 129-131 illustrate portions of another surgical
instrument 18010 that includes a surgical end effector 18300 that
operably interfaces with an elongate shaft assembly 18200 that
employs many of the features of the various shaft assemblies
disclosed herein. The surgical end effector 18300 is adapted to cut
and staple tissue and includes a first jaw in the form of an
elongate channel 18302 that is configured to operably support a
surgical staple cartridge therein. The illustrated surgical end
effector 18300 further includes a second jaw in the form of an
anvil 18310 that is supported on the elongate channel 18302 for
movement relative thereto. The anvil 18310 may be movably actuated
by one of the closure systems described herein.
[0454] The elongate shaft assembly 18200 includes a shaft spine
18210 that defines a shaft axis SA-SA that coincides with the
center of the elongate shaft assembly 18200. Stated another way,
the shaft axis SA-SA extends axially down the geometric center of
the elongate shaft assembly 18200. The spine 18210 may otherwise be
similar to spine 210 described above and support a firing member
and closure sleeve arrangements as described herein and which are
not specifically illustrated in FIGS. 129-131 for the purpose of
clarity. As can be seen in FIG. 131, the surgical end effector
18300 may be articulated relative to the elongate shaft assembly
18200 about an articulation joint 18270. The articulation joint
18270 serves to couple the elongate channel 18302 to a distal end
18215 of the spine 18210. The surgical end effector 18300 and, more
particularly, the elongate channel 18302 of the surgical end
effector 18300 defines an end effector axis EA that represents the
axial center of the elongate channel 18302. When the surgical end
effector 18300 is in an unarticulated orientation, the end effector
axis EA is axially aligned with the shaft axis SA-SA as illustrated
in FIG. 130. As used in this context, the term "aligned with" may
mean "coaxially aligned" with the shaft axis SA-SA or simply
parallel with the shaft axis SA-SA. In the illustrated arrangement,
the elongate channel 18302 of the surgical end effector 18300
includes a proximally protruding attachment arm 18309 that is
coupled to the spine 18210 by a spring pin 18818 that defines an
articulation axis B-B. The articulation axis B-B is transverse to
the shaft axis SA-SA. In FIGS. 130 and 131, the articulation axis
B-B may coincide with the center axis of the spring pin 18818, for
example, and would essentially protrude out of the page in each of
those Figures. As can also be seen in those Figures, in the
illustrated arrangement, the articulation axis B-B is offset to one
lateral side 18213 of the shaft axis SA-SA. Stated another way, the
articulation axis B-B does not intersect the shaft axis SA or the
end effector axis EA. The spring pin 18818 is configured to apply a
biasing force to the attachment arm 18309 to bias the attachment
arm 18309 as well as the surgical end effector 18300 in the
clockwise direction CW. Thus, the spring pin 18818 serves to bias
the surgical end effector 18300 into the unarticulated position
shown in FIG. 130 wherein the end effector axis EA and the shaft
axis SA-SA are axially aligned.
[0455] The illustrated embodiment further includes an articulation
system designated as 18800 that employs an articulation lock 18810
that is similar to articulation locks 350, 810 and 10810 described
above. The articulation lock 18810 can be configured and operated
to selectively lock the surgical end effector 18300 in various
articulated positions. Such arrangement enables the surgical end
effector 18300 to be rotated, or articulated, relative to the
elongate shaft assembly 18200 when the articulation lock 18810 is
in its unlocked state. The articulation lock 18810 includes a
distal articulation driver 18820 that is movably supported within
the elongate shaft assembly 18200 for selective longitudinal travel
in a distal direction DD and a proximal direction PD. The distal
articulation driver 18820 is movable along an articulation
actuation axis AAA that is laterally offset and parallel to the
shaft axis SA-SA in response to articulation control motions
applied thereto. In alternative embodiments, the distal
articulation driver 18820 does not comprise a portion of an
articulation lock, but instead operably interfaces with a source of
articulation motions (in a handle or in a robotic system) that
serves to selectively axially advance the distal articulation
driver 18820 in the distal direction DD and retract the distal
articulation driver 18820 in the proximal direction PD. The distal
articulation driver 18820 is pivotally pinned to the proximal end
18305 of the elongate channel 18302. As can be seen in FIG. 130,
the distal articulation driver 18820 is pinned to the elongate
channel 18302 at a location that is on one lateral side 18211 of
the shaft axis SA-SA and end effector axis EA. The articulation
axis B-B is located on an opposite lateral side 18213 of the shaft
axis SA-SA from the point at which the distal articulation driver
18820 is attached to the elongate channel 18302. As can also be
seen in FIG. 130, in the illustrated arrangement, the point at
which the distal articulation driver 18820 is attached to the
elongate channel 18302 is distal to the articulation axis B-B. As
can be seen in FIG. 130, when in an unarticulated position, the end
effector axis EA is in axial alignment with the shaft axis SA-SA.
Advancement of the distal articulation driver 18820 in the proximal
direction PD will cause the surgical end effector 18300 to pivot
about the articulation axis B-B in the counterclockwise direction
CCW. Stated another way, the surgical end effector 18300 is
articulatable to positions on one side of the shaft axis SA that
coincide with the first side 18211 of the spine 18210. Once the
clinician desires to return the surgical end effector 18300 to the
unarticulated orientation, the distal articulation driver 18820 is
moved in the distal direction DD, which will start to move the
surgical end effector 18300 in a clockwise direction CW. The spring
pin 16818 also serves to help pull the surgical end effector 18300
in the clockwise direction CW back to the unarticulated
position.
[0456] The surgical end effector 18300 of the embodiment
illustrated in FIGS. 129-131 comprises a surgical cutting and
stapling device that employs a firing beam 18220 of the various
types and configurations described herein. In one arrangement, for
example, the firing beam 18220 may be of laminated construction as
described herein. In the illustrated embodiment, the firing beam
18220 is slidably supported within a pathway 18230 that is formed
in the spine 18210 and interfaces with a firing system of the
various types described herein which are configured to selectively
advance the firing beam 18220 in the distal direction DD and
retract the firing beam 18220 in the proximal direction PD. The
distal end of the firing beam 18220 is coupled to or otherwise
operably interfaces with a firing member (not shown) or tissue
cutting member (not shown) of the various types disclosed herein.
In at least one form, for example, the firing member 18220 includes
a tissue cutting surface and is configured to interact with staple
support members that are operably supported within the staple
cartridge so as to drive the staple support members (and the
staples supported thereon) toward the anvil as the firing member
18220 is driven distally through the staple cartridge.
[0457] The articulation joint 18270 of the illustrated embodiment
facilitates articulation of the surgical end effector 18300 only in
one direction (CCW). Stated another way, the surgical end effector
18300 is pivotable to an articulated position that coincides with
the first lateral side 18211 of the spine 18210. In one example,
the surgical end effector 18300 may articulate to a fully
articulated position shown in FIG. 131 wherein the angle 18950
between the end effector axis EA and the shaft axis is
approximately seventy-five degrees (75.degree.). To accommodate
such range of articulation, the distal end 18215 of the spine 18210
has a notch 18217 that is adjacent to the first side 18211 of the
spine 18210.
[0458] As indicated above, the firing beam 18220 is slidably
supported in a pathway 18220 that is provided in the spine 18210.
In the illustrated arrangement, the pathway 18230 includes a
"first" or proximal portion 18232 that is axially aligned with the
shaft axis SA-SA and a "second" or distal portion 18234 that is not
axially aligned on the shaft axis SA-SA. In the illustrated
embodiment, the distal portion 18234 of the pathway 18230 opens at
the distal end of the spine at a location that is not axially
aligned with the shaft axis SA-SA. As can be seen in FIGS. 130 and
131, for example, the distal portion 18234 of the pathway 18230
opens at a location (designated as 18236 in FIGS. 130 and 131) that
is laterally offset to a second lateral side 18213 of the shaft
axis SA-SA. Further, in at least the illustrated embodiment, the
distal portion 18234 of the pathway 18230 is curved so as to cause
the firing beam 18220 to start bending in the articulation
direction before the firing beam 18220 exits the spine 18210. Such
arrangement provides the firing beam 18220 with a higher bend
radius when compared to the bend radiuses of the firing beams of
other articulatable end effector arrangements that articulate in
one direction and wherein the firing beam exits the spine 18210
while aligned on the shaft axis SA-SA. Further, the pathway 18230
in the illustrated arrangement includes a first or proximal portion
18232 that is axially aligned with the shaft axis SA-SA, a second
arcuate portion 18233 that curves in a first direction away from
the shaft axis SA-SA and a third arcuate section 18235 that curves
toward the shaft axis SA-SA. As can be further seen in FIGS. 130
and 131, the location 18236 at which the firing beam 18220 exits
the spine 18210 is located on the second side 18213 of the shaft
axis SA that is opposite from the first side 18211 to which the end
effector 18300 articulates. Thus, the distal portion 18234 of the
pathway 18230 serves to position or bias the firing beam 18220 to
an "off axis position" relative to the shaft axis SA-SA (a position
that is not axially aligned with the shaft axis SA). Such
arrangement provides the firing beam 18220 with a gradual arc as it
exits the spine 18210. This feature may serve to reduce the
likelihood of the firing beam 18220 buckling as it spans the
articulation joint 18270 to enter the surgical end effector 18300.
In other arrangements, the proximal portion of the pathway may be
laterally offset from the shaft axis. In still other arrangements,
the proximal portion of the pathway may be axially aligned with the
shaft axis and the distal portion of the pathway may angle to one
side of the shaft axis such that when the firing beam exits the
distal portion of the pathway, the firing beam is axially offset to
the opposite side of the shaft axis to which the end effector is
articulatable. In such arrangement, the distal portion of the
pathway may be relatively straight and not curved. In still other
arrangements, the distal portion and proximal portion of the
pathway may lie along a common axis that is laterally offset from
the shaft axis on the side that is opposite from the side to which
the end effector is articulatable. All of such arrangements shift
the firing beam off center as it exits the spine and allow for a
larger bend radius without adding space distal to the articulation
axis.
[0459] The firing beams employed in the various surgical
instruments disclosed herein are configured to sufficient flex to
accommodate the various articulated positions of the end effector.
In some arrangements, the firing beam may actually comprise a
firing rod 18600 which is coupled to a flexible firing beam 18700
at a coupling or connection 18702. See FIG. 132. The firing rod
18600 is slidably supported in the spine 18210 of the elongate
shaft assembly and can translate in response to driving motions
initiated in the handle of the surgical instrument or by a robotic
system, for example. In various instances, the firing rod 18600 can
resist deformation, torqueing and/or bowing when transferring a
firing motion. For example, the firing rod 18600 can be comprised
of a rigid and/or inflexible material and/or structure.
[0460] At the coupling 18702, the firing rod 18600 is engaged with
a downwardly-protruding key 18701 of the flexible firing beam 18700
(see, e.g., FIG. 132A). For example, the key 18701 can extend into
an elongate aperture 18606 formed in a distal end 18604 of the
firing rod 18600. The firing rod-key engagement is configured to
transfer the translation of the firing rod 18600 to the flexible
firing beam 18700. In various instances, the coupling 18702 can be
proximate to the articulation joint 18270 such that the flexible
firing beam 18700 extends from the coupling 18702 and through the
articulation joint 18270.
[0461] In the arrangement depicted in FIGS. 133, 135, the flexible
firing beam 18700 includes a plurality of lateral portions or
layers 18702a, 18702b, 18702c, 18702d, 18702e, 18702f. In various
instances, the portions 18702a, 18702b, 18702c, 18702d, 18702e,
18702f can be held together and movable and/or shiftable relative
to each other. For example, the lateral portions 18702a, 18702b,
18702c, 18702d, 18702e, 18702f can be fixed together at the distal
end of the flexible firing beam 18700. The portions 18702a, 18702b,
18702c, 18702d, 18702e, 18702f can be welded, formed together,
fastened and/or otherwise secured together at the distal ends
thereof, for example. At least a portion of the remaining length of
the lateral portions 18702a, 18702b, 18702c, 18702d, 18702e, 18702f
can be configured to move and/or shift relative to the adjacent
lateral portion(s) 18702a, 18702b, 18702c, 18702d, 18702e, 18702f
For example, when the flexible firing beam 18700 bends at the
articulation joint 18270, the lateral portions 18702a, 18702b,
18702c, 18702d, 18702e, 18702f can shift into a staggered and/or
offset configuration between the bend in the articulation joint
18270 and the proximal end of the flexible firing beam 18700. FIG.
134 illustrates a proximal end 18704 of one form of the firing beam
18700' wherein the lateral portions 18702a, 18702b, 18702c, 18702d,
18702e are even with each other when the firing beam 18700 is
straight. FIG. 135 illustrates another flexible beam arrangement
wherein the layer portions 18702a, 18702b, 18702c, 18702d, 18702e
and 18702f are staggered at the proximal end 18704.
[0462] Referring again to FIGS. 132 and 133, the proximal end 18704
of the flexible firing beam 18700 extends into a cavity 18608 that
is formed in the distal end 18604 of the firing rod 18600, the
portions 18702a, 18702b, 18702c, 18702d, 18702e 18702f of the
flexible firing beam 18700 can extend along firing paths through
the articulation joint 18270. When the end effector 18300 is
articulated relative to the elongate shaft assembly 18200, the
flexible firing beam 18700 and portions 18702a, 18702b, 18702c,
18702d, 18702e 18702f thereof can bend within the articulation
joint 18270. In such instances, the lateral portions adjacent
lateral portion(s) 18702a, 18702b, 18702c, 18702d, 18702e 18702f
can extend along altered paths when the end effector 18300. A
bumper member 18610 is supported in the cavity to accommodate
shifting of the portions 18702a, 18702b, 18702c, 18702d, 18702e
18702f during articulation. For example, the bumper member 18610
may rotate within the cavity 18608 as the firing beam portions
18702a, 18702b, 18702c, 18702d, 18702e 18702f splay relative to
each other such that the portions 18702a, 18702b, 18702c, 18702d,
18702e 18702f would likely become evenly loaded by the bumper
member 18610 during firing (i.e., advanced in the distal
direction). The bumper member 18610 may or may not be fabricated
from a compliant material. Further details and specifics concerning
the above-described firing beam/firing rod arrangement as well as
other configurations that may be employed with the various
embodiments disclosed herein may be found in U.S. patent
application Ser. No. 14/574,478, entitled SURGICAL INSTRUMENT
SYSTEMS COMPRISING AN ARTICULATABLE END EFFECTOR AND MEANS FOR
ADJUSTING THE FIRING STROKE OF A FIRING MEMBER, the entire
disclosure of which is hereby incorporated by reference herein.
[0463] FIG. 132A depicts a coupling arrangement 18702' that employs
a one-way latch arrangement for limiting the distal travel of the
firing rod 18600'. As can be seen in that Figure, the firing rod
18600' includes a lock aperture 18620 that has an angled distal
surface 18622 and a perpendicular surface 18624 that is
perpendicular to or transverse to the direction in which the firing
rod 18600' travels. A lock member 18630 is movably supported in a
lock cavity 18640 in the shaft spine 18210. A lock spring 18642 is
supported in the lock cavity 18640 to bias lock member 18630 into
sliding contact with the firing rod 18600'. In the illustrated
embodiment, the lock member 18630 has an angled distal surface
18632 and a perpendicular rear surface 18634 and is sized to extend
into the lock aperture 18620 when the firing rod 18600' has moved
to a predetermined distal-most position. When the firing rod 18600'
is distally advanced to the position shown in FIG. 132A, the lock
member 18630 spring 18642 biases the lock member into the lock
aperture 18620 to thereby further prevent any further distal
movement of the firing rod 18600'. However, when the firing rod
18600' is retracted in the proximal direction PD, the firing rod
18600' will contact the angled distal surface 18632 and bias the
lock member 18630 into the lock cavity 18640 in the shaft spine
18210 to permit the firing rod 18600' to move in the proximal
direction PD past the lock member 18630.
[0464] FIGS. 136 AND 137 illustrate portions of another surgical
instrument 19010 that includes a surgical end effector 19300 that
operably interfaces with an elongate shaft assembly 19200 that
employs many of the features of the various shaft assemblies
disclosed herein. For example, the elongate shaft assembly 19200 is
similar to elongate shaft assembly 200' described in detail above
except for the differences discussed below. In the illustrated
example, the elongate shaft assembly 19200 includes a dual
articulation link arrangement designated as 19800 that employs an
articulation lock 19810 that is similar to articulation locks 350,
810 and 10810 described above. The articulation lock 19810 can be
configured and operated to selectively lock the surgical end
effector 19300 in various articulated positions. Such arrangement
enables the surgical end effector 19300 to be rotated, or
articulated, relative to the elongate shaft assembly 19200 when the
articulation lock 19810 is in its unlocked state. A first distal
articulation driver 19820 is supported within the spine 19210 of
the elongate shaft assembly 19200 for selective longitudinal travel
in a distal direction DD and the proximal direction PD in response
to corresponding articulation control motions applied thereto. A
downwardly protruding pivot pin 19818 is adapted to be pivotally
received within a pivot hole (not shown) formed in the proximal end
portion of the elongate channel 19302 of the surgical end effector
19800. Such arrangement facilitates pivotal travel of the elongate
channel 19302 of the surgical end effector 19300 relative to the
spine 19210 about an articulation axis B-B that is defined by the
pivot hole. As indicated above, the articulation axis B-B is
transverse to the shaft axis SA-SA that is defined by elongate
shaft assembly 19200.
[0465] Still referring to FIGS. 136 and 137, the dual articulation
link arrangement 19800 is configured to establish a "push/pull"
arrangement when an articulation force is applied thereto through
the first distal articulation driver 19820. As can be seen in those
Figures, the first distal articulation driver 19820 has a first
drive rack 19842 formed therein. A first articulation rod 19844
protrudes distally out of the first distal articulation driver
19820 and has a first axial slot 19845 therein. In addition, a
first end effector link 19850 is movably coupled to the surgical
end effector 19300. In one arrangement, for example, the distal end
19852 of the first end effector link 19850 is pivotally pinned to
the elongate channel 19302 of the end effector 19300. A proximal
end 19854 of the first end effector link 19850 includes a first pin
19856 that is slidably received within the first axial slot 19845
in the first articulation rod 19844 of the first distal
articulation driver 19820. The dual articulation link arrangement
19800 further comprises a second distal articulation driver 19860
that has a second drive rack 19862 formed therein. The second
distal articulation driver 19860 is movably supported within the
elongate shaft assembly 19200 for longitudinal travel in the distal
direction DD and the proximal direction PD. A second articulation
rod 19864 protrudes distally out of the second distal articulation
driver 19860 and has a second axial slot 19865 therein. In
addition, a second end effector link 19870 is movably coupled to
the surgical end effector 19300. In one arrangement, for example,
the distal end 19872 of the second end effector link 19870 is
pivotally pinned to the elongate channel 19302 of the end effector
19300. A proximal end 19874 of the second end effector link 19870
includes a second pin 19876 that is slidably received within the
second axial slot 19865 in the second articulation rod 19864 of the
second distal articulation driver 19860. As can be seen in FIG.
136, the first end effector link 19850 is attached to the elongate
channel 19302 for longitudinal travel along a first articulation
axis FA that is parallel and located on a first axial side of the
shaft axis SA-SA. The second end effector link 19870 is attached to
the elongate channel 19302 for longitudinal travel along a second
articulation axis SDA that is parallel to and off to a second
lateral side of the shaft axis SA-SA. See FIG. 136. Thus, by
simultaneously pulling on one of the end effector links 19850,
19870, the surgical end effector 19300 will be articulated about
the articulation axis B-B relative to the elongate shaft assembly
19200. In the illustrated arrangement, the first axial slot 19845
and the second slot 19865 are parallel to each other and are
parallel to the shaft axis SA-SA. As can be further seen in FIGS.
136 and 137, the first end effector link 19850 and the second end
effector link 19870 each have a curved or arcuate shape that curves
around the articulation axis B-B. Such curved shape may further
lead to an increased range of articulation. Further each of the
first and second axial slots 19845, 19865 may each have a
predetermined length that facilitates a desired amount of
articulation.
[0466] As can also be seen in FIGS. 136 and 137, a proximal pinion
gear 19880 and a distal pinion gear 19882 are centrally disposed
between the first drive rack 19842 and the second drive rack 19862
and are in meshing engagement therewith. In alternative
embodiments, only one pinion gear or more than two pinion gears may
be employed. Thus, at least one pinion gear is employed. The
proximal pinion gear 19880 and the distal pinion gear 19882 are
rotatably supported in the spine 19810 for free rotation relative
thereto such that as the first distal articulation driver 19820 is
moved in the distal direction DD, the pinion gears 19880, 19882
serve to drive the second distal articulation driver 19860 in the
proximal direction PD. Likewise, when the first distal articulation
driver 19820 is pulled in the proximal direction PD, the pinion
gears 19880, 19882 drive the second distal articulation driver
19860 in the distal direction DD. As the first distal articulation
driver 19820 moves the in the proximal direction, the pinion gears
19880, 19882 serve to drive the second distal articulation driver
19860 in the distal direction DD. Such movement of the first and
second distal articulation drivers 19820, 19860 causes the surgical
end effector 19300 and more specifically, the elongate channel
19302 of the surgical end effector 19300 to pivot about the
articulation axis B-B in the articulation direction of arrow 19821.
Conversely, to articulate the end effector 19300 in the direction
of arrow 19823, the first distal articulation driver 19820 is moved
the in the distal direction which causes the pinion gears 19880,
19882 to drive the second distal articulation driver 19860 in the
proximal direction PD. Such movement of the first and second distal
articulation drivers 19820, 19860 causes the surgical end effector
19300 and more specifically, the elongate channel 19302 of the
surgical end effector 19300 to pivot about the articulation axis
B-B in the articulation direction of arrow 19823.
[0467] The dual solid link articulation arrangement 19800 and its
variations may afford the surgical end effector with a greater
range of articulation when compared to other articulatable surgical
end effector configurations. In particular, the solid link
articulation arrangements disclosed herein may facilitate ranges of
articulation in the range of between one degree (1.degree.) to
sixty-five degrees (65.degree.). Use of at least one pinion gear to
interface between the distal articulation drivers enables the end
effector to be "pushed" and "pulled" into position and also may
reduce the amount of end effector "slop" or undesirable or
unintended movement during use. The dual solid link articulation
arrangements disclosed herein also comprise an articulation system
that has improved strength characteristics when compared to other
articulation system arrangements. The proximal ends of the dual
links translate forward and backward along their respective slots
as the end effector is articulated. These slots may provide the
system with higher resistance to bending forces on the dual links
and reduced backlash of the system by constraining the motion of
the dual links.
[0468] FIGS. 138-142 illustrate portions of another surgical
instrument 20010 that includes a surgical end effector 20300 that
operably interfaces with an elongate shaft assembly 20200 that
employs many of the features of the various shaft assemblies
disclosed herein. For example, the elongate shaft assembly 20200 is
similar to elongate shaft assembly 200' described in detail above
except for the differences discussed below. A downwardly protruding
pivot pin 20818 is adapted to be pivotally received within a pivot
hole 20305 formed in the proximal end portion of the elongate
channel 20302 of the surgical end effector 20300. See FIG. 139.
Such arrangement facilitates pivotal travel of the elongate channel
20302 of the surgical end effector 20300 relative to the spine
20210 about an articulation axis B-B that is defined by the pivot
hole 20305. The articulation axis B-B is transverse to the shaft
axis SA-SA that is defined by elongate shaft assembly 20200. In the
illustrated example, the elongate shaft assembly 20200 includes a
dual articulation driver arrangement designated as 20800 that
employs an articulation lock 20810 (FIG. 139) that is similar to
articulation locks 350, 810 and 10810 described above. The
articulation lock 20810 can be configured and operated to
selectively lock the surgical end effector 20300 in various
articulated positions. Such arrangement enables the surgical end
effector 20300 to be rotated, or articulated, relative to the
elongate shaft assembly 20200 when the articulation lock 20810 is
in its unlocked state. A first distal articulation driver 20820 is
supported within the spine 20210 of the elongate shaft assembly
20200 for selective longitudinal travel along a first articulation
axis FA in a distal direction DD and the proximal direction PD in
response to corresponding articulation control motions applied
thereto. The first articulation axis FA is parallel to and located
to a first lateral side of the shaft axis SA-SA. The first distal
articulation driver 20820 includes a first proximal drive rack
20842 and a first distal drive rack 20844 formed therein. The dual
articulation link arrangement 20800 further comprises a second
distal articulation driver 20860 that has a second proximal drive
rack 20862 and a second distal drive rack 20864 formed therein. The
second distal articulation driver 20860 is movably supported within
the elongate shaft assembly 20200 for longitudinal travel along a
second articulation axis SDA in the distal direction DD and the
proximal direction PD. The second articulation axis SDA is parallel
to and located to a second lateral side of the shaft axis SA-SA.
See FIG. 138. The first and second distal articulation drivers
20820, 20860 operably interface with a central articulation member
20850. As can be seen in FIG. 140, the central articulation member
20850 is pivotally attached to the shaft spine 20210 by a pin 20851
that serves to define a gear axis GA about which the central
articulation member 20850 may pivot. The gear axis GA is parallel
to the articulation axis BB. See FIG. 139. The central articulation
member 20850 includes a body portion 20852 that has a gear portion
20854 formed thereon. The gear portion is 20854 is in meshing
engagement with the first distal drive rack 20844 and the second
distal drive rack 20864.
[0469] The surgical end effector 20300 of the embodiment
illustrated in FIGS. 138-142 comprises a surgical cutting and
stapling device. The elongate channel 20302 is configured to
operably support a surgical staple cartridge (not shown) and an
anvil assembly 20310. The surgical end effector 20300 also employs
a firing beam (not shown) of the various types and configurations
described herein. In the illustrated arrangement, a middle support
member 20950 is pivotally and slidably supported relative to the
shaft spine frame 20810. As can be seen in FIG. 140, the middle
support member 20950 includes a central body portion 20952 that
defines a central slot 20954 that is configured to slidably receive
the firing member therethrough to provide lateral support to the
firing member as it traverses from the elongate shaft assembly
20200 across the articulation joint 20270 to the elongate channel
20302. A proximal tongue 20955 protrudes proximally from the body
portion 20952 to be movably coupled to the central articulation
member 20850. In the illustrated arrangement, an attachment pin
20960 extends through a proximal hole 20956 in the proximal tongue
20955. The attachment pin 20960 is received within an attachment
slot 20856 that is provided in the body portion 20852 of the
central articulation member 20850. The proximal tongue 20955
further includes an elongate slot 20957 that is configured to
receive therein a pivot pin 20211 formed in the shaft spine 20210.
See FIG. 139. The middle support member 20950 further includes a
distal tongue 20958 that is movably coupled to the proximal end of
the elongate channel 20302. As can be further seen in FIG. 139, a
coupler assembly 20970 pivotally couples the middle support member
20950 to the elongate channel 20302. More specifically, the coupler
assembly 20970 includes a body plate 20972 that has an end effector
attachment pin 20974 protruding therefrom that is configured to
extend through a first pivot hole 20307 in the elongate channel
20302 and a distal pivotal hole 20959 in the distal tongue 20958 of
the middle support member 20950. Such arrangement serves to
facilitate pivotal travel of the middle support member 20950
relative to the elongate channel 20302 about an end effector pivot
axis EPA that is defined by the end effector attachment pin 20974.
As can be seen in FIG. 139, the end effector pivot axis EPA is
parallel to the articulation axis B-B. In the illustrated
arrangement, the multiple support link assembly 920 further
comprises a proximal support link 940 and a distal support link
950. See FIG. 139. Specific details regarding the operation of the
proximal and distal support links and the middle support member
have been discussed above and will not be repeated for the sake of
brevity.
[0470] The dual articulation driver arrangement 20800 is configured
to establish a "push/pull" arrangement when an articulation force
is applied thereto through the first distal articulation driver
20820. As can also be seen in FIGS. 138, 139, 141 and 142, a
proximal pinion gear 20880 and a distal pinion gear 20882 are
centrally disposed between the first proximal drive rack 20842 and
the second proximal drive rack 20862 and are in meshing engagement
therewith. In alternative embodiments, only one pinion gear or more
than two pinion gears may be employed. Thus, at least one pinion
gear is employed. The proximal pinion gear 20880 and the distal
pinion gear 20882 are rotatably supported in the spine 20810 for
free rotation relative thereto such that as the first distal
articulation driver 20820 is moved in the distal direction DD, the
pinion gears 20880, 20882 serve to drive the second distal
articulation driver 20860 in the proximal direction PD. Likewise,
when the first distal articulation driver 20820 is pulled in the
proximal direction PD, the pinion gears 20880, 20882 drive the
second distal articulation driver 20860 in the distal direction DD.
As the first distal articulation driver 20820 moves the in the
proximal direction, the pinion gears 20880, 20882 serve to drive
the second distal articulation driver 20860 in the distal direction
DD. Such movement of the first and second distal articulation
drivers 20820, 20860 causes the central articulation member 20850
through the middle support member 20950 to articulate the surgical
end effector 20300 and more specifically, the elongate channel
20302 of the surgical end effector 20300 about the articulation
axis B-B in the articulation direction of arrow 20821. See FIG.
141. Conversely, to articulate the end effector 20300 in the
direction of arrow 20823, the first distal articulation driver
20820 is moved the in the distal direction DD which causes the
pinion gears 20880, 20882 to drive the second distal articulation
driver 20860 in the proximal direction PD. Such movement of the
first and second distal articulation drivers 20820, 20860 causes
the surgical end effector 20300 and more specifically, the elongate
channel 20302 of the surgical end effector 20300 to pivot about the
articulation axis B-B in the articulation direction of arrow 20823.
See FIG. 142.
[0471] The dual solid articulation driver arrangement 20800 and its
variations may afford the surgical end effector with a greater
range of articulation when compared to other articulatable surgical
end effector configurations. In particular, the dual solid driver
articulation arrangements disclosed herein may facilitate ranges of
articulation in the range of sixty-five degrees (65.degree.). Use
of at least one pinion gear to interface between the distal
articulation drivers enable the end effector to be "pushed" and
"pulled" into position also may reduce the amount of end effector
"slop" or undesirable or unintended movement during use. The dual
solid driver articulation arrangements disclosed herein also
comprise an articulation system that has improved strength
characteristics when compared to other articulation system
arrangements.
[0472] FIGS. 143 and 144 depict a portion of an elongate shaft
assembly 21200 that is substantially similar to the elongate shaft
assembly 1200 described above, except for various differences
discussed in further detail below. As can be seen in FIG. 143, the
elongate shaft assembly 21200 includes an articulation lock 21810
that is substantially similar to articulation locks 810 and 1810
and operates in essentially the same manner. As can be seen in FIG.
22, the elongate shaft assembly 21200 includes a shaft frame 21812
that comprises a portion of a shaft frame 21210. A first distal
articulation driver 21820 is movably supported within the elongate
shaft assembly 21200 for selective longitudinal travel in a distal
direction DD and a proximal direction PD in response to
articulation control motions applied thereto. The shaft frame 21812
further includes a distal end portion 21814 that has a pivot pin
21818 formed thereon. The pivot pin 21818 is adapted to be
pivotally received within a pivot hole (not shown) provided in a
distal pulley 21340 that is non-rotatably formed on the proximal
end 21320 of the elongate channel 21302 of a surgical end effector
21300. See FIG. 144. Such arrangement facilitates pivotal travel
(i.e., articulation) of the elongate channel 21302 of the surgical
end effector 21300 relative to the shaft frame 21812 about an
articulation axis B-B defined by the pivot hole and the pin 21818.
The shaft frame 21812 further includes a centrally disposed cavity
21817 and a distal notch 21819 that is located between the distal
end 21814 and the centrally disposed cavity 21817.
[0473] The shaft assembly 21200 further includes a second distal
articulation driver 21860 that comprises a cable member 21862 that
is rotatably journaled on a proximal pulley assembly 21840 and the
distal pulley 21340. In one form, the cable member 21862 comprises
a cable that is fabricated from stainless steel, tungsten,
aluminum, titanium, etc., for example. The cable may be of braided
or multi-stranded construction with various numbers of strands to
attain desired levels of tensile strength and flexibility. In
various arrangements, for example, the cable member 21862 may have
a diameter in the range of 0.03 inches to 0.08 inches and more
preferably in the range of 0.05-0.08 inches. A preferred cable may,
for example, be fabricated from 300 series stainless steel--half
hard to full hard. In various arrangements, the cable 21862 may
also be coated with, for example, Teflon.RTM., copper, etc. for
improved lubricity and/or to reduce stretching, for example. A
first lug 21863 is attached to one end of the cable 21862 and a
second lug 21864 is attached to the other end of the cable 21862
by, for example, crimping. See FIG. 144.
[0474] Still referring to FIG. 144, the cable member 21862 is
coupled to a distal end 21821 of the first distal articulation
driver 21820 by a coupler assembly 21830. The coupler assembly
21830 includes a coupler body 21832 that a proximal lug cavity
21834 formed therein and a distal lug cavity 21836 formed therein.
The first lug 21863 is configured to be retainingly received within
the first lug cavity 21834 and the second lug 21836 is configured
to be retainingly received within the second lug cavity 21836.
Other fastener arrangements, screws, rivets, clamps, adhesive, etc.
may also be employed. When the cable member 21862 is journaled on
the pulleys 21840 and 21340, the coupler assembly 21830 is free to
move axially within the distal notch 21819 in the shaft frame 21812
in response to the axial movement of the first distal articulation
driver 21820. The articulation motions generated by the axial
movement of the first distal articulation driver 21820 are
transferred to the second distal articulation driver 21860 or the
cable 21862. An attachment ball or lug 21866 is attached to the
cable 21862 and is received in a groove or pocket (not shown)
formed in the distal pulley 21340. Thus, movement of the endless
member 21862 is transferred to the surgical end effector 21300 and
more specifically to the elongate channel 21302 of the surgical end
effector 21300 to articulate the end effector about articulation
axis B-B. As such, when the first distal articulation driver 21820
is moved in the distal direction DD, the cable member 21862 causes
the surgical end effector 21300 to articulate about the
articulation axis B-B in one articulation direction and when the
first distal articulation driver 21820 is moved in the proximal
direction PD, the cable member 21862 causes the surgical end
effector 21300 to articulate about the articulation axis B-B in an
opposite articulation direction.
[0475] In the illustrated arrangement, the proximal pulley assembly
21840 is configured to selectively introduce tension into the cable
member 21862. For example, as can be seen in FIG. 144, the proximal
pulley assembly 21840 comprises a proximal pulley 21842 that is
rotatably mounted on a pulley mount or bearing 21844. The axis of
the pulley mount 21844 is concentric with the center pulley axis
CPA so that the proximal pulley 21842 is freely rotatable on the
pulley mount 21844. The pulley mount 21844 is affixed to the shaft
frame 21812 by an eccentric mounting shaft 21846 that is attached
to the pulley mount 21844. Stated another way, the central axis MSA
of the mounting shaft 21846 is offset from the center pulley axis
CPA (and the center axis of the pulley mount). See FIG. 143. The
mounting shaft 21846 is sized to be frictionally received in a
mounting hole 21813 provided in the shaft frame 21812. A hexagonal
socket 21848 that is configured to receive a standard hexagonal
wrench is provided in the pulley mount 21844. See FIG. 143. Thus,
the tension in the cable member 21862 may be increased by inserting
a hexagonal wrench into the hexagonal socket 21848 and turning the
mounting shaft 21846 in the appropriate direction. Such action will
cause the mounting shaft 21846 as well as the pulley mount 21844 to
rotate. Because the center axis CPA of the pulley mount 21844 is
offset from the center axis MSA of the mounting shaft 21846, the
center axis CPA may be moved further away from the center axis of
the distal pulley 21340 (which may be coaxial with the articulation
axis B-B) to thereby increase the tension in the cable member
21862.
[0476] FIGS. 145-147 depict a portion of an elongate shaft assembly
22200 that is substantially similar to the elongate shaft assembly
1200 described above, except for various differences discussed in
further detail below. Those components of the elongate shaft
assembly 1200 that have been discussed in detail above are
referenced with like element numbers and, for the sake of brevity,
will not be further discussed in great detail beyond that which may
be necessary to understand the operation of shaft assembly 22200.
As can be seen in FIG. 147, the elongate shaft assembly 22200
includes an articulation lock 22810 that is substantially similar
to articulation locks 810 and 1810 and operates in essentially the
same manner. As can be seen in FIG. 147, the elongate shaft
assembly 22200 includes a shaft frame 22812 that comprises a
portion of a shaft spine 22210. A first distal articulation driver
(omitted for clarity in FIGS. 145-147) is movably supported within
the elongate shaft assembly 22200 for selective longitudinal travel
in a distal direction DD and a proximal direction PD in response to
articulation control motions applied thereto. The shaft frame 22812
further includes a distal end portion 22814 that has a pivot pin
22818 formed thereon. The pivot pin 22818 is adapted to be
pivotally received within a pivot hole 22342 formed in a distal
pulley 22340 that is non-rotatably formed in a proximal end portion
22320 of an elongate channel 22302 of a surgical end effector
22300. See FIG. 147. Such arrangement facilitates pivotal travel
(i.e., articulation) of the elongate channel 22302 of the relative
to the shaft frame 22812 about an articulation axis B-B defined by
the pivot hole 22342 and the pin 22818. The shaft frame 22812
further includes a centrally disposed cavity 22817 and a distal
notch 22819 that is located between the distal end 22814 and the
centrally disposed cavity 22817.
[0477] The shaft assembly 22200 further includes a second distal
articulation driver 22860 that comprises a cable member 1862 that
is rotatably journaled on a proximal pulley assembly 22840 and the
distal pulley 22340. In one form, the cable member 1862 comprises a
cable that is fabricated from stainless steel, tungsten, aluminum,
titanium, etc., for example. The cable may be of braided or
multi-stranded construction with various numbers of strands to
attain desired levels of tensile strength and flexibility. In
various arrangements, for example, the cable member 1862 may have a
diameter in the range of 0.03 inches to 0.08 inches and more
preferably in the range of 0.05-0.08 inches. A preferred cable may,
for example, be fabricated from 300 series stainless steel--half
hard to full hard. In various arrangements, the cable may also be
coated with, for example, Teflon.RTM., copper, etc. for improved
lubricity and/or to reduce stretching, for example. A first lug
1863 is attached to one end of the cable and a second lug 1864 is
attached to the other end of the cable member 1862 by, for example,
crimping.
[0478] Referring now to FIGS. 145 and 147, the cable member 1862 is
coupled to a distal end 1821 of the first distal articulation
driver by a coupler assembly 1830. The articulation driver may
comprise a distal articulation driver portion of the articulation
lock 22810 and is not shown in FIGS. 145 and 147 for clarity
purposes. The coupler assembly 1830 comprises an upper coupler
portion (not shown) formed on the distal end of the first distal
articulation driver (not shown) and a lower coupler portion 1834.
The lower coupler portion 1834 is formed with two cradles 1835 that
are configured to receive the lugs 1862, 1864 therein. A pair of
attachment pins 1836 is configured to be pressed into holes (not
shown) in the upper coupler portion (not shown) to affix the two
coupler portions together. Other fastener arrangements, screws,
rivets, adhesive, etc. may be employed. When the cable member 1862
is journaled on the proximal pulley assembly 22840 and the distal
pulley 22340, the coupler assembly 1830 is free to move axially
within the distal notch 22819 in the shaft frame 22812 in response
to the axial movement of the first distal articulation driver. The
articulation motions generated by the axial movement of the first
distal articulation driver are transferred to the second distal
articulation driver 22860 or the cable member 1862. An attachment
ball or lug 1866 is attached to the cable member 1862 and is
received in a groove or pocket 1342 formed in the distal pulley
22340. Thus, movement of the cable member 1862 is transferred to
the surgical end effector 22300 and more specifically to the
elongate channel 22302 of the surgical end effector 22300 to
articulate the end effector about articulation axis B-B. Thus, when
the first distal articulation driver is moved in the distal
direction DD, the cable member 1862 causes the surgical end
effector 22300 to articulate about the articulation axis B-B in one
articulation direction and when the first distal articulation
driver is moved in the proximal direction PD, the cable member 1862
causes the surgical end effector 22300 to articulate about the
articulation axis B-B in an opposite articulation direction.
[0479] In the illustrated arrangement, the proximal pulley assembly
22840 is configured to selectively introduce tension into the cable
member 1862. For example, as can be seen in FIG. 147, the proximal
pulley assembly 22840 comprises a proximal pulley 22842 that is
rotatably mounted on a pulley mount or bearing 22844. The pulley
mount 22844 is attached to a mounting block 22846 that is movably
received within an axial mounting cavity 22821 formed in the shaft
frame 22812. A tensioning screw 22823 is positioned within the
shaft frame 22812 to adjust the position of the mounting block
22846 within the axial mounting cavity 22821. See FIGS. 145 and
147. Screwing the tensioning screw 22823 inward will cause the end
22825 of the tensioning screw 22823 to bias the mounting block
22846 in the proximal direction to introduce tension in the cable
member 1862. Such action will move the central axis CPA of the
proximal pulley 22842 away from the center axis of the distal
pulley 22340 a tension distance DT. Thus as the tension distance DT
increases, so does the tension in the cable member 1862.
[0480] FIGS. 148 and 149 depict an alternative proximally pulley
assembly 22840' that may be used to tension the cable member 1862.
For example, as can be seen in FIG. 148, the proximal pulley
assembly 22840' comprises a proximal pulley 22842 that is rotatably
mounted on a pulley mount or bearing 22844. The pulley mount 22844
is attached to a mounting block 22846 that is movably received
within an axial mounting cavity 22821 formed in the shaft frame
22812'. In this arrangement, a tension cam 22850 is attached to an
eccentric mounting spindle 22854. The eccentric mounting spindle
22854 defines a central axis MSA' that is offset from the center
axis of the tension cam 22850. As can be seen in FIG. 149, the
mounting spindle 22854 has a knurled outer surface and is adapted
to be received within a knurled bore 22855 in the shaft frame
22812'. A hexagonal socket 22856 that is configured to receive a
standard hexagonal wrench is provided in the mounting spindle
22854. See FIG. 149. Thus, the tension in the cable member 1862 may
be increased by inserting a hexagonal wrench into the hexagonal
socket 22856 and turning the mounting spindle 22854 in the
appropriate direction. Rotation of the mounting spindle 22854 will
cause the tension cam 22852 to rotate and cam the mounting block
22846 in the proximal direction PD within the axial slot 22821 to
introduce tension in the cable member 1862. Such action will move
the central axis CPA of the proximal pulley 22842 away from the
center axis of the distal pulley 22340 a tension distance DT. Thus,
as the tension distance DT increases, so does the tension in the
cable member 1862.
[0481] FIG. 150 illustrates another second distal articulation
driver 23860 that comprises a cable member 1862 that is rotatably
journaled on a proximal pulley 23842 and a distal pulley 22340. A
first lug 1863 is attached to one end of the cable 1862 and a
second lug 1864 is attached to the other end of the cable 1862 by,
for example, crimping. The cable member 1862 is coupled to a distal
end 1821 of a first distal articulation driver 1820 by a coupler
assembly 1830 in the manners described herein. In this embodiment,
a cable tensioning assembly 23900 is employed to introduce a
desired amount of tension into the cable member 1862. As can be
seen in FIG. 150, the cable tensioning assembly 23900 includes a
mounting bracket 23902 that is mounted on one lateral side of the
shaft frame and a tension roller assembly 23910 that is oriented to
contact the cable member 1862 adjacent a second lateral side of the
shaft frame. The tension roller assembly 23910 comprises a lateral
bracket 23912 that is movably coupled to the mounting bracket
23902. In the illustrated arrangement, the lateral bracket 23912 is
configured for threaded engagement with the mounting bracket 23902.
A tension roller 23914 is mounted to the lateral bracket 23912 in
contact with the cable member 1862. To increase the tension in the
cable member 1862 the lateral bracket 23912 is moved toward the
mounting bracket in the lateral direction LD. Such movement causes
the tension roller 23914 to move laterally inward toward the
mounting member and contacts the cable member 1862 to bias the
cable member 1862 in the lateral direction LD that is transverse to
the rotary direction RD1 and rotary direction RD2 to thereby
increase tension in the cable member 1862.
[0482] FIG. 151 illustrates another second distal articulation
driver 23860' that comprises a cable member 1862 that is rotatably
journaled on a proximal pulley (not shown) and a distal pulley (not
shown). A first lug 1863 is attached to one end of the cable 1862
and a second lug 1864 is attached to the other end of the cable
1862 by, for example, crimping. The cable member 1862 is coupled to
a distal end 1821 of a first distal articulation driver 1820 by a
tensioning assembly 1830' in the manners described herein. In this
embodiment, the distal end 1821' of the first distal articulation
driver 1820' comprises a proximal cleat 1823' and a distal cleat
1825'. The distal cleat 1825' is movably affixed to the proximal
cleat 1823' by a tensioning screw member 23900'. In the illustrated
arrangement, the tensioning screw member 23900' includes a first or
proximal threaded portion 23922 that is threaded in a first
threaded direction into a threaded hole 23940 in the proximal cleat
1823' and a second or distal threaded portion 23924 that is
threaded in a second threaded direction into a threaded hole 23942
in the distal cleat 1825' that is opposite to the first threaded
direction. An actuation nut 23926 is fixed to the screw member
23900' in a central position between the first threaded portion
23922 and the second threaded portion 23924. The tensioning screw
23900' may be rotated by using a wrench or other appropriate tool
to rotate the actuation nut 23926. Rotation of the tensioning screw
23900' in a first direction will draw the proximal cleat 1823' and
the distal cleat in a first direction toward each other along a
tensioning axis TA that is parallel to the cable member axis CA. As
the proximal cleat 1823' and the distal cleat 1825' move toward
each other, the first and second lugs 1863, 1864 also move toward
each other to introduce tension into the cable member 1862.
Rotation of the tensioning screw 23920 in a second opposite
direction will drive the first and second cleats away from each
other along the tensioning axis TA. Such movement of the first and
second cleats 1823', 1825' away from each other will permit the
first and second lugs 1863, 1864 to move away from each other to
thereby reduce the tension in the cable member 1862.
[0483] FIG. 152 illustrates a closure sleeve 260 which can be
utilized to close and/or open an anvil of an end effector 300 as
was described in detail above or stated another way, the closure
sleeve may be used to close a movable jaw or jaws of a surgical end
effector. Shown in cross-section in that Figure, the closure sleeve
260 includes proximal end 261 that has an annular slot 262 therein.
Such arrangement serves to attach the closure sleeve 260 to a
closure shuttle for axial travel therewith while enabling the
closure sleeve 260 to rotate relative to the closure shuttle about
the shaft axis. As was also described above, the closure shuttle is
axially actuated by a corresponding closure system or closure drive
system that is configured to generate closure actuation motions.
The closure sleeve 260 further includes openings 266 that enable
mounts on a rotation nozzle to extend therethrough to be seated in
recesses in the shaft spine. Such arrangement facilitates rotation
of the shaft spine and closure sleeve 260 about the shaft axis when
the nozzle is rotated relative to the handle. As was discussed
above, the elongate shaft assembly 200 further includes a switch
drum 500 that is rotatably received on the closure sleeve 260. See
FIGS. 3 and 4. The switch drum 500 comprises a hollow shaft segment
502 that has a shaft boss 504 formed thereon for receive an
outwardly protruding actuation pin 410 therein. In various
circumstances, the actuation pin 410 extends through a slot 267
into a longitudinal slot 408 provided in the lock sleeve 402 to
facilitate axial movement of the lock sleeve 402 when it is engaged
with the proximal articulation driver 230. Further details
regarding those structures and their operation are set forth above.
As further discussed above, the closure sleeve 260 also includes
double pivot closure sleeve assembly to facilitate attachment of
the closure sleeve 260 to an end effector closure sleeve 272. Upper
and lower tangs 264 and 265 are formed on the distal end of the
closure sleeve 260 to facilitate such attachment in the various
manners described above.
[0484] As was also discussed above, to close the anvil of the end
effector (or to apply closure motions to the jaws or other portions
of the end effector), the closure sleeve 260 is axially advanced in
the distal direction DD upon actuation of the closure system or
closure drive system. The axial distance in which the closure
sleeve 260 must move on the shaft spine to cause the anvil (or jaw)
to be moved to a closed position is referred to as the "closure
stroke". The maximum axial distance that the closure sleeve must
move to completely close the jaws or other portion of the end
effector may be referred to herein as the "complete closure stroke
distance". That distance, for example, may comprise the total axial
distance that the closure sleeve 260 moves from a starting or
unactuated position to an ending position that corresponds to fully
closed end effector position. In one embodiment, the complete
closure stroke distance of the closure sleeve 260 is approximately
0.230 inches, for example.
[0485] FIG. 153 illustrates a multi-part closure member assembly
24260 that is configured to be movably supported on a spine
assembly (not shown) of an elongate shaft assembly of the various
types disclosed herein. As will be described below, a "distal
closure member" or "distal closure sleeve" 24400 is configured to
move an "axial closure distance" on the spine assembly that is less
than a "complete closure stroke distance" that a corresponding
"proximal closure member" or "proximal closure sleeve" 24261 moves
in response to an application of a closure actuation motion from a
closure system. As can be seen in FIG. 153, the proximal closure
sleeve 24261 may be identical to the portion of the closure sleeve
260 that is proximal to the point where the diameter of the closure
sleeve 260 is reduced. Thus, those features of the proximal closure
sleeve 24261 that are identical to the features of the closure
sleeve 260 are identified in FIG. 153 with like element numbers.
The proximal closure sleeve 24261 differs from the closure sleeve
260 in the following manners. First, the proximal closure sleeve
24261 terminates at a "necked portion" generally designated as
24300 and includes an internal stop wall or contact portion 24302.
In the illustrated embodiment, a distal end 24402 of the distal
closure sleeve 24400 is identical to the distal end of the closure
sleeve 260 and includes the upper and lower tangs 264 and 265 to
facilitate attachment to the end effector closure sleeve in the
various manner disclosed herein. The proximal end 24404 of the
distal closure sleeve 24400 slidably extends through an opening
24304 in the necked portion or the distal end 24300 of the proximal
closure sleeve 24261. The proximal end 24404 of the distal closure
sleeve portion 24400 is flared outward to prevent the distal
closure sleeve 24400 from separating from the proximal closure
sleeve 24261 while facilitating relative sliding motion between
those components. Still referring to FIG. 153, such arrangement
facilitates the proximal closure sleeve 24261 to travel an axial
distance in the distal direction DD before the distal closure
sleeve 24400 is axially advanced. This distance is referred to as a
"proximal travel zone" or "dead zone" designated as 24307. In one
arrangement, for example, the proximal closure sleeve 24261 is
configured to move through a complete closure stroke distance of
0.230 inches. In such arrangement, for example, (referring to FIG.
153) the "proximal axial length" DZ of the proximal travel zone
24307 may be, for example, in the range of 0.050 inches-0.150
inches. Thus, the proximal axial length DZ is less than the
complete closure stroke distance that the proximal closure sleeve
24261 moves from a starting position to an ending position that
corresponds to a complete closed condition of the end effector.
Stated another way, this arrangement serves to reduce the distal
closure sleeve's amount of axial travel during actuation of the
closure system. Such arrangement also enables the distal closure
sleeve 24400 to have a diameter that is smaller than the diameter
of the proximal closure sleeve 24261.
[0486] FIG. 154 illustrates another multi-part closure member
assembly 25260 that may be used in connection with an elongate
shaft assembly of the various constructions described herein that
include a spine assembly or arrangement upon which the closure
member assembly 25260 may be movably supported. In this embodiment,
the axial travel of the distal closure sleeve 25400 is less than
the axial travel of the proximal closure sleeve 25261 when the
proximal closure sleeve 25261 is axially advanced by the closure
system through a complete closure stroke or sequence. The proximal
closure sleeve 25261 may be identical to the portion of the closure
sleeve 260 that is proximal to the point where the diameter of the
closure sleeve 260 is reduced. Thus, those features of the proximal
closure sleeve 25261 that are identical to the features of the
closure sleeve 260 are identified with like element numbers. The
proximal closure sleeve 25261 interfaces with the closure system or
closure drive system in the manner described above and thus, when
the closure system is actuated, the proximal closure sleeve 25261
will axially travel the same axial distance that the closure sleeve
260 would travel upon actuation. The proximal closure sleeve 25261
differs from the closure sleeve 260 in the following manners.
First, the proximal closure sleeve 25261 terminates at the necked
portion generally designated as 25300. The distal end 24402 of the
distal closure sleeve portion 24400 is identical to the distal end
of the closure sleeve 260 and includes the upper and lower tangs to
facilitate attachment to the end effector closure sleeve in the
various manner disclosed herein. The proximal end 25404 of the
distal closure sleeve 25400 slidably extends through an opening
25304 in the necked portion 25300 of the proximal closure sleeve
25261. The proximal end 25404 of the distal closure sleeve 25400
includes an opening 25406 through which a center tab member 25306
extends. The center tab member 25306 serves to prevent the distal
closure sleeve 25400 from separating from the proximal closure
sleeve 25261. In addition, the proximal end 25404 includes
diametrically opposed slots 25308 that are configured to receive
corresponding upper and lower tabs 25310 therein. Such arrangement
facilitates travel of the proximal closure sleeve 25261 an axial
distance in the distal direction DD before the distal closure
sleeve 24400 is axially advanced thereby. The space between the
tabs 25310 and the bottom of the slots 25308 is referred to as a
"proximal travel zone" or "dead zone" designated as 25307. The
proximal closure sleeve 25261 is configured to move through a
complete closure stroke distance of 0.230 inches. In such
arrangement, for example, (referring to FIG. 154) the "proximal
axial length" DZ of the proximal travel zone 25307 may be, for
example, in the range of 0.050 inches-0.150 inches. Thus, the
proximal axial length DZ is less than the complete closure stroke
distance that the proximal closure sleeve 25261 moves from a
starting position to an ending position that corresponds to a
complete closed condition of the end effector. Stated another way,
this arrangement serves to reduce the distal closure sleeve's
amount of axial travel during actuation of the closure system. Such
arrangement also enables the distal closure sleeve 25400 to have a
diameter that is smaller than the diameter of the proximal closure
sleeve 25261.
[0487] FIG. 155 illustrates another two-part closure member
assembly 26260 that may be used in connection with an elongate
shaft assembly of the various constructions described herein that
include a spine assembly or arrangement upon which the closure
member assembly 26260 may be movably supported. In this embodiment,
the axial travel of the distal closure sleeve 26400 is less than
the axial travel of the proximal closure sleeve 26261 when the
proximal closure sleeve 26261 is axially advanced by the closure
system through a complete closure stroke or sequence. The proximal
closure sleeve 26261 may be identical to the portion of the closure
sleeve 260 that is proximal to the point where the closure sleeve's
diameter is reduced. Thus, those features of the proximal closure
sleeve portion 26261 that are identical to the features of the
closure sleeve 260 are identified with like element numbers. The
proximal closure sleeve portion 26261 interfaces with the closure
system in the manner described above and thus, when the closure
system or closure drive system is actuated, the proximal closure
sleeve portion 26261 may axially travel the same distance that the
closure sleeve 260 would travel upon actuation. The proximal
closure sleeve 26261 differs from the closure sleeve 260 in the
following manners. First, the proximal closure sleeve 26261 has a
flanged distal end 26300. In particular, an annular flange 26302
extends inwardly from the distal end 26300 and defines an opening
26304. The distal end of the distal closure sleeve 26400 is
identical to the distal end of the closure sleeve 260 and includes
the upper and lower tangs to facilitate attachment to the end
effector closure sleeve in the various manner disclosed herein. The
proximal end 26404 of the distal closure sleeve 26400 slidably
extends through an opening 26304 in the distal end 26300 of
proximal closure sleeve 26261. The proximal end 26404 of the distal
closure sleeve 26400 extends through the opening 26304 and includes
an outwardly extending annular flange 26406 which, in cooperation
with the inwardly extending annular flange 26302 prevents the
distal closure sleeve 26400 from separating from the proximal
closure sleeve 26261. In addition, the proximal closure sleeve
26261 includes a stop portion that is proximal to said distal end
26300. In the illustrated arrangement, the stop portion comprises
an inwardly extending crimped portion 26306. Such arrangement
facilitates travel of the proximal closure sleeve 26261 an axial
distance in the distal direction DD before the crimped portion
26306 contacts the annular flange 26406 to axially drive the distal
closure sleeve 26400 in the distal direction DD. The space between
the crimped portion 26306 and the outwardly extending flange 26406
is referred to as a "proximal travel zone" or "dead zone"
designated as 26307. The proximal closure sleeve 26261 is
configured to move through a complete closure stroke distance of,
for example, 0.230 inches. In such arrangement, for example,
(referring to FIG. 154) the "proximal axial length" DZ of the
proximal travel zone 26307 may be, for example, in the range of
0.050 inches-0.150 inches. Thus, the proximal axial length DZ is
less than the complete closure stroke distance that the proximal
closure sleeve 26261 axially moves from a starting position to an
ending position that corresponds to a complete closed condition of
the end effector. Stated another way, this arrangement serves to
reduce the distal closure sleeve's amount of axial travel during
actuation of the closure system. Such arrangement also enables the
distal closure sleeve 26400 to have a diameter that is smaller than
the diameter of the proximal closure sleeve 26261.
[0488] FIG. 156 illustrates another two-part closure member
assembly 27260 that may be used in connection with an elongate
shaft assembly of the various constructions described herein that
include a spine assembly or arrangement upon which the closure
member assembly 27260 may be movably supported. In this embodiment,
the axial travel of the distal closure sleeve 27400 is less than
the axial travel of the proximal closure sleeve 27261 when the
proximal closure sleeve 27261 is axially advanced by the closure
system through a complete closure stroke or sequence. The proximal
closure sleeve portion 27261 may be identical to the portion of the
closure sleeve 260 that is proximal to the point where the closure
sleeve's diameter is reduced. Thus, those features of the proximal
closure sleeve portion 27261 that are identical to the features of
the closure sleeve 260 are identified with like element numbers.
The proximal closure sleeve portion 27261 interfaces with the
closure system or closure drive system in the manner described
above and thus, when the closure system or closure drive system is
actuated, the proximal closure sleeve 27261 may axially travel the
same distance that the closure sleeve 260 would travel upon
actuation. The proximal closure sleeve 27261 differs from the
closure sleeve 260 in the following manners. First, the proximal
closure sleeve 27261 has a flanged distal end 27300. In particular,
an annular flange 27302 extends inwardly from the distal end 27300
and defines an opening 27304. The distal end of the distal closure
sleeve 27400 is identical to the distal end of the closure sleeve
260 and includes the upper and lower tangs o facilitate attachment
to the end effector closure sleeve in the various manner disclosed
herein. The proximal end 27404 of the distal closure sleeve 27400
slidably extends through an opening 27304 in the distal end 27300
of proximal closure sleeve 27261. The proximal end 27404 of the
distal closure sleeve 27400 extends through the opening 27304 and
includes an outwardly extending annular flange 27406 which
cooperates with the inwardly extending annular flange 27302 to
prevent the distal closure sleeve 27400 from separating from the
proximal closure sleeve 27261. In addition, a stop ring 27305 is
attached to the proximal closure sleeve 27261 within the distal end
27300. The stop ring 27305 may be welded to the proximal closure
sleeve 27261, for example. The stop ring 27305 includes an inwardly
extending proximal stop flange 27306. Such arrangement facilitates
travel of the proximal closure sleeve 27261 an axial distance in
the distal direction DD before the stop flange 27306 contacts the
annular flange 27406 to axially drive the distal closure sleeve
portion 27400 in the distal direction DD. The space 27307 between
the proximal stop flange 27306 and the outwardly extending flange
27406 is referred to as a "proximal travel zone" or "dead zone". In
one arrangement, for example, that has a complete closure stroke
distance of 0.230 inches, the "proximal axial length" DZ of the
proximal travel zone 27307 may be, for example, in the range of
0.050 inches-0.150 inches. Thus, the proximal axial length DZ is
less than the complete closure stroke distance that the proximal
closure sleeve 27261 axially moves from a starting position to an
ending position that corresponds to a complete closed condition of
the end effector. Stated another way, this arrangement serves to
reduce the distal closure sleeve's amount of axial travel during
actuation of the closure system. Such arrangement also enables the
distal closure sleeve 27400 to have a diameter that is smaller than
the diameter of the proximal closure sleeve 27261.
[0489] FIGS. 157-158 illustrate another multi-part closure sleeve
embodiment 28260 wherein the distal closure sleeve portion 28400
that moves a distance that is shorter than a distance that a
proximal closure sleeve portion 28261 moves when the closure system
is actuated through a complete closure stroke or sequence. The
proximal closure sleeve portion 28261 may be essentially identical
to the portion of the closure sleeve 260 that is proximal to the
point where the closure sleeve's diameter is reduced. Thus, those
features of the proximal closure sleeve portion 28261 that are
identical to the features of the closure sleeve 260 are identified
with like element numbers. The proximal closure sleeve portion
28261 interfaces with the closure system in the manner described
above and thus, when the closure system is actuated, the proximal
closure sleeve portion 28261 may axially travel the same distance
that the closure sleeve 260 would travel upon actuation. The
proximal closure sleeve portion 28261 differs from the closure
sleeve 260 in manner discussed below. First, the proximal closure
sleeve portion 28261 is configured to interface with a closure
stroke reduction assembly, generally designated as 29000.
[0490] As can be seen in FIGS. 157-158, in the illustrated
arrangement, the closure stroke reduction assembly 29000 comprises
a proximal mounting ring 29002 that has a proximal hub portion
29004 on which the distal end 28300 of the proximal closure sleeve
28261 is received and attached thereto. For example, the distal end
28300 of the proximal closure sleeve 28261 may be attached to the
proximal hub portion 29004 by welding, adhesive, etc. Thus, the
proximal mounting ring 29002 will move axially with the proximal
closure sleeve 28261. As can be further seen in FIGS. 157 and 158,
an inwardly extending proximal flange 29006 extends from the
proximal end of the proximal hub portion 29004. A hole 29008 is
provided through the proximal flange 29006 to slidably receive the
shaft spine assembly 2210, 2212 therethrough. A distal conical
shaped member 29010 is attached to the distal end of the proximal
mounting ring 29002. The distal conical shaped member 29010 may be
attached to the proximal mounting ring 29002 by, for example,
welding, adhesive, etc. and is free to slide on the distal closure
sleeve portion 28400 when the proximal mounting ring 29002 is
distally advanced.
[0491] The proximal mounting ring 29002 is slidably supported on a
distal mounting ring 29020 that is attached to the distal closure
sleeve portion 28400. The distal mounting ring 29020 includes a
distal portion 29022 that has a proximal mounting hub 29024
protruding therefrom. The proximal mounting hub 29024 has a
diameter that is less than the diameter of the distal portion 29022
of the distal mounting ring 29020. The proximal mounting hub 29024
may be attached to the proximal end 28404 of the distal closure
sleeve portion 28400 by welding, adhesive, etc. The proximal hub
portion 29004 of the proximal mounting ring 29002 is slidably
received on the proximal mounting hub 29024 for axial travel
thereon. A compression spring 29032 is received within a spring
cavity 29030 formed between the distal portion 29022 of the distal
mounting ring 29020 and the proximal hub portion 29004 of the
proximal mounting ring 29002. When the closure system is in an
unactuated configuration, the proximal flange 29006 of the proximal
hub portion 29004 is spaced a "proximal travel zone" or "proximal
dead zone" 29009 from the proximal end 28404 of the distal closure
sleeve 28400. The proximal axial length of the proximal travel zone
29009 is designated as DZ. The spring cavity 29030 may also be
referred to as a "distal travel zone" or "distal dead zone" and has
a distal axial length DS that may comprise the dead zone axial
length DZ plus an amount of clearance required to accommodate the
compression spring 29032 when in its fully compressed state. In one
arrangement, for example, that has a complete closure stroke
distance of 0.230 inches, the "proximal axial length" DZ of the
proximal travel zone 29009 may be, for example, in the range of
0.050 inches-0.150 inches and the distal axial length DS may be in
the range of 0.100 inches-0.200 inches plus the length necessary to
accommodate a fully compressed compression spring 29032. Stated
another way, in the illustrated arrangement, DS is always greater
than DZ. Thus, the proximal axial length DZ is less than the
complete closure stroke distance that the proximal closure sleeve
27261 axially moves from a starting position to an ending position
that corresponds to a complete closed condition of the end
effector. Such arrangement facilitates travel of the proximal
closure sleeve portion 28261 an axial distance in the distal
direction DD before the proximal flange 29006 of the proximal
mounting ring 29002 contacts the proximal end 28404 of the distal
closure sleeve portion 28400 to axially drive the distal closure
sleeve portion 28400 in the distal direction DD. The closure stroke
reduction assembly 29000 is provided in multiple pieces to
facilitate ease of assembly. This arrangement serves to reduce the
amount of axial travel of the distal closure sleeve portion 28400
during actuation of the closure system. Such arrangement employs a
distal closure sleeve portion 28400 that has an outer diameter that
is smaller than the outer diameter of the proximal closure sleeve
portion 28261. In alternative embodiments, the closure stroke
reduction assembly could be located anywhere within the shaft
assembly (e.g., within the nozzle portion, along the length of the
shaft, in the articulation joint or at the end effector pivot).
Specifically, there could be a slot at the end effector pivot/joint
to allow for dead stroke during closure.
[0492] The surgical instrument systems described herein are
motivated by an electric motor; however, the surgical instrument
systems described herein can be motivated in any suitable manner.
In various instances, the surgical instrument systems described
herein can be motivated by a manually-operated trigger, for
example. The motor or motor(s) may comprise a portion or portions
of a robotically controlled system.
[0493] The surgical instrument systems described herein have been
described in connection with the deployment and deformation of
staples; however, the embodiments described herein are not so
limited. Various embodiments are envisioned which deploy fasteners
other than staples, such as clamps or tacks, for example. Moreover,
various embodiments are envisioned which utilize any suitable means
for sealing tissue. For instance, an end effector in accordance
with various embodiments can comprise electrodes configured to heat
and seal the tissue. Also, for instance, an end effector in
accordance with certain embodiments can apply vibrational energy to
seal the tissue.
[0494] The surgical instrument systems described herein are
motivated by one or more electric motors; however, the surgical
instrument systems described herein can be motivated in any
suitable manner. In various instances, the surgical instrument
systems described herein can be motivated by a manually-operated
trigger, for example.
EXAMPLES
Example 1
[0495] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective articulation
relative to the elongate shaft assembly about an articulation axis
that is transverse to, and laterally offset from, the shaft axis.
The surgical end effector defines an end effector axis and is
configured to be selectively articulated between an unarticulated
position wherein the effector axis is axially aligned with the
shaft axis to a maximum articulated position on one side of the
shaft axis wherein the end effector axis is perpendicular to the
shaft axis. An articulation system operably interfaces with the
surgical end effector to selectively move the surgical end effector
between the unarticulated position and the articulated
positions.
Example 2
[0496] The surgical instrument of Example 1, wherein the
articulation system comprises an articulation drive member that is
operably coupled to the surgical end effector for selectively
applying pushing and pulling motions thereto.
Example 3
[0497] The surgical instrument of Examples 1 or 2, wherein the
articulation system comprises a de-articulation member that is
configured to selectively only apply a pulling motion to the
surgical end effector.
Example 4
[0498] The surgical instrument of Examples 1, 2 or 3, wherein the
articulation system comprises an end effector driver link that is
coupled to the surgical end effector. A distal articulation driver
is coupled to the end effector driver link and is configured to
selectively apply a pushing motion and a pulling motion thereto. A
de-articulation member is attached to the surgical end effector and
is configured to only apply a pulling motion thereto.
Example 5
[0499] The surgical instrument of Examples 1, 2 or 3, wherein the
articulation system comprises an end effector driver link that is
coupled to the surgical end effector. A distal articulation driver
is coupled to the end effector driver link and is configured to
selectively apply a pushing motion and a pulling motion thereto. A
de-articulation member is configured to apply a de-articulation
motion to the surgical end effector.
Example 6
[0500] The surgical instrument of Examples 1, 2, 3, 4 or 5, wherein
the surgical end effector is pivotally coupled to the elongate
shaft assembly by a spring pin that defines the articulation axis
and which is configured to apply a de-articulation biasing motion
to the surgical end effector.
Example 7
[0501] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. The surgical instrument further
comprises a surgical end effector that defines an end effector
axis. A articulation joint is configured to facilitate articulation
of the surgical end effector relative to the elongate shaft
assembly between an unarticulated position wherein the end effector
axis is axially aligned with the shaft axis and a fully articulated
position wherein the end effector axis is perpendicular to the
shaft axis. The surgical instrument further comprises means for
applying an articulation motion to the surgical end effector. The
means for applying is positioned only along one lateral side of the
shaft axis.
Example 8
[0502] The surgical instrument of Example 7, wherein a proximal end
of the surgical end effector is angled relative to the end effector
axis and wherein a distal end of the elongate shaft assembly is
angled relative to the shaft axis.
Example 9
[0503] The surgical instrument of Example 8, wherein the proximal
end of the surgical end effector is oriented at an end effector
angle relative to the end effector axis and wherein the distal end
of the elongate shaft assembly is oriented at a shaft angle
relative to the shaft axis.
Example 10
[0504] The surgical instrument of Example 8, wherein the end
effector angle and the shaft angle are equal to each other.
Example 11
[0505] The surgical instrument of Examples 7, 8, 9 or 10 further
comprising means for applying a de-articulation motion to the
surgical end effector.
Example 12
[0506] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that comprises
a proximal end that is pivotally coupled to the distal end of the
elongate shaft assembly for selective pivotal travel relative
thereto about an articulation axis that is laterally offset from
the shaft axis and extends transversely relative thereto. The
surgical instrument further comprises an articulation system that
comprises an end effector driver link that is operably coupled to
the surgical end effector. An articulation driver is supported for
longitudinal travel in distal and proximal directions upon
application of articulation motions thereto. The articulation
driver is coupled to the end effector driver link to selectively
articulate the surgical end effector relative to the elongate shaft
assembly about the articulation axis. A flexible de-articulation
member is coupled to the elongate shaft assembly and the surgical
end effector to apply de-articulation motions to the surgical end
effector.
Example 13
[0507] The surgical instrument of Example 12, wherein the
articulation driver is configured to apply a first articulation
motion to the surgical end effector only in one articulation
direction that is transverse to the shaft axis.
Example 14
[0508] The surgical instrument of Examples 12 or 13, wherein the
surgical end effector defines an end effector axis and wherein the
end effector is movable between an unarticulated position wherein
the effector axis is axially aligned with the shaft axis to a
maximum articulated position on one lateral side of the shaft axis
wherein the end effector axis is perpendicular to the shaft
axis.
Example 15
[0509] The surgical instrument of Examples 12, 13 or 14, wherein
the articulation driver and the end effector driver link are
located on one lateral side of the shaft axis when the surgical end
effector is in an unarticulated orientation.
Example 16
[0510] The surgical instrument of Examples 12, 13, 14 or 15,
wherein the surgical end effector comprises a firing member that is
configured for axial travel within the surgical end effector and
wherein the elongate shaft assembly further comprises an axially
movable firing beam that operably interfaces with the firing member
and is selectively movable in the distal direction in response to a
firing motion applied thereto. The firing beam is also selectively
movable in the proximal direction in response to a retraction
motion that is applied thereto.
Example 17
[0511] The surgical instrument of Examples 12, 13, 14, 15 or 16,
wherein the proximal end of the surgical end effector is pivotally
pinned to the distal end of the elongate shaft assembly by an
articulation pin and wherein the flexible de-articulation member is
configured to flex around the articulation pin when the surgical
end effector is articulated about the articulation axis.
Example 18
[0512] The surgical instrument of Examples 12, 13, 14, 15, 16 or
17, wherein the proximal end of the surgical end effector is angled
relative to the end effector axis and wherein the distal end of the
elongate shaft assembly is angled relative to the shaft axis.
Example 19
[0513] The surgical instrument of Example 18, wherein the proximal
end of the surgical end effector is oriented at an end effector
angle relative to the end effector axis and wherein the distal end
of the elongate shaft assembly is oriented at a shaft angle
relative to the shaft axis.
Example 20
[0514] The surgical instrument of Example 19, wherein the end
effector angle and the shaft angle are equal to each other.
Example 21
[0515] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a proximal end that is pivotally
coupled to the distal end of the elongate shaft assembly such that
the surgical end effector is selectively movable between an
unarticulated position and a fully articulated position relative to
the shaft axis. A firing beam is movably supported within a pathway
in the elongate shaft assembly for selective longitudinal travel
therein. The pathway is configured to position a portion of the
firing beam that exits the distal end of the elongate shaft member
to an off axis position relative to the shaft axis.
Example 22
[0516] The surgical instrument of Example 21, wherein the pathway
comprises a first pathway portion that is aligned on the shaft axis
and a second arcuate pathway portion that communicates with the
first pathway portion and curves in a first direction away from the
shaft axis. The pathway further comprises a third arcuate pathway
portion that communicates with the second arcuate pathway portion
and curves in a second direction toward the shaft axis.
Example 23
[0517] The surgical instrument of Examples 22 or 21, wherein the
surgical end effector is configured to articulate in only one
articulation direction that is transverse to the shaft axis.
Example 24
[0518] The surgical instrument of Examples 21, 22 or 23, wherein
the proximal end of the surgical end effector is pivotally coupled
to the elongate shaft assembly at an attachment location on the
distal end of the elongate shaft assembly for selective pivotal
travel between the unarticulated position and the fully articulated
position about an articulation axis that extends transversely
relative to the shaft axis, but does not intersect the shaft
axis.
Example 25
[0519] The surgical instrument of Examples 21, 22, 23 or 24,
further comprising an articulation driver that is supported for
longitudinal travel relative to the elongate shaft assembly and is
coupled to the surgical end effector for applying articulation
motions thereto.
Example 26
[0520] The surgical instrument of Example 25, wherein the
articulation driver is configured to apply pushing and pulling
motions to the surgical end effector.
Example 27
[0521] The surgical instrument of Examples 21, 23, 24, 25 or 26,
wherein the pathway comprises a first pathway portion that is
axially aligned on the shaft axis and a second pathway portion that
communicates with the first pathway portion and extends distally
therefrom such that at least a portion of the second pathway
portion is not axially aligned with the shaft axis.
Example 28
[0522] The surgical instrument of Examples 21, 22, 23, 24, 25, 26
or 27, wherein the firing beam comprises a plurality of beam layers
that are laminated together.
Example 29
[0523] The surgical instrument of Examples 21, 22, 23, 24, 25, 26,
27 or 28, wherein the surgical end effector comprises a firing
member that operably interfaces with the firing beam and is
configured for axial travel within the surgical end effector.
Example 30
[0524] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that includes
a proximal end. An articulation joint couples the proximal end of
the surgical end effector to the distal end of the elongate shaft
assembly. A firing beam is movably supported within the elongate
shaft assembly for longitudinal travel therein along the shaft
axis. The surgical instrument further comprises means for biasing a
portion of the firing beam into an arcuate configuration out of
axial alignment with the shaft axis prior to the articulation
joint.
Example 31
[0525] The surgical instrument of Example 30, wherein the
articulation joint pivotally couples the proximal end of the
surgical end effector to the distal end of the elongate shaft
assembly for selective articulation relative to the elongate shaft
assembly about an articulation axis that is transverse to, and
laterally offset from, the shaft axis.
Example 32
[0526] The surgical instrument of Examples 30 or 31, wherein the
surgical end effector defines an end effector axis and wherein the
surgical end effector is selectively articulatable between a
non-articulated position wherein the end effector axis is axially
aligned with the shaft axis and a fully articulated position
located to one lateral side of the shaft axis.
Example 33
[0527] The surgical instrument of Examples 30, 31 or 32, wherein
the firing beam comprises a plurality of beam layers that are
laminated together.
Example 34
[0528] The surgical instrument of Examples 30, 31, 32 or 33,
wherein the surgical end effector comprises a firing member
operably interfacing with the firing beam and being configured for
axial travel within the surgical end effector.
Example 35
[0529] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that includes
a proximal end. An articulation joint couples the proximal end of
the surgical end effector to the distal end of the elongate shaft
assembly. A firing beam is movably supported within the elongate
shaft assembly for longitudinal travel therein along the shaft
axis. The surgical instrument further comprises means for biasing a
portion of the firing beam out of the axial alignment with the
shaft axis prior to the articulation joint.
Example 36
[0530] The surgical instrument of Example 35, wherein the
articulation joint pivotally couples the proximal end of the
surgical end effector to the distal end of the elongate shaft
assembly for selective articulation relative to the elongate shaft
assembly about an articulation axis that is transverse to, and
laterally offset from, the shaft axis.
Example 37
[0531] The surgical instrument of Examples 35 or 36, wherein the
surgical end effector defines an end effector axis and wherein the
surgical end effector is selectively articulatable between a
non-articulated position wherein the end effector axis is axially
aligned with the shaft axis and a fully articulated position
located to one lateral side of the shaft axis.
Example 38
[0532] The surgical instrument of Examples 35, 36 or 37, wherein
the firing beam comprises a plurality of beam layers that are
laminated together.
Example 39
[0533] The surgical instrument of Examples 35, 36, 37 or 38,
wherein the surgical end effector comprises a firing member that
operably interfaces with the firing beam and is configured for
axial travel within the surgical end effector.
Example 40
[0534] The surgical instrument of Example 35, 36, 37, 38 or 39,
wherein the means comprises an arcuate path in a spine portion of
the elongate shaft assembly. The arcuate path is configured to
slidably receive the firing beam therein and opens at a distal end
of the spine portion at a location that is axially offset from the
shaft axis.
Example 41
[0535] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further comprises an
articulation system that includes a single articulation driver that
is supported for longitudinal travel along a path that is laterally
offset from the shaft axis. A cross link is coupled to the
articulation driver and extends transversely across the shaft axis
to be coupled to the surgical end effector.
Example 42
[0536] The surgical instrument of Example 41, wherein the
articulation axis intersects the shaft axis.
Example 43
[0537] The surgical instrument of Example 41, wherein the surgical
end effector defines an end effector axis and wherein the surgical
end effector is selectively articulatable between a non-articulated
position wherein the end effector axis is axially aligned with the
shaft axis and a fully articulated position located to one lateral
side of the shaft axis wherein the end effector axis is transverse
to the shaft axis.
Example 44
[0538] The surgical instrument of Example 43, wherein when the
surgical end effector is in the fully articulated position, the end
effector axis is located at an articulation angle relative to the
shaft axis. The articulation angle is at least sixty-five
degrees.
Example 45
[0539] The surgical stapling instrument of Examples 43 or 44,
wherein the surgical end effector is selectively articulatable to
another fully articulated position located on another lateral side
of the shaft axis.
Example 46
[0540] The surgical instrument of Examples 41, 42, 43, 44 or 45,
wherein the cross link is pivotally coupled to the proximal end of
the surgical end effector about a link axis that is parallel to the
articulation axis.
Example 47
[0541] The surgical instrument of Examples 41, 42, 43, 44, 45, or
46, wherein the single distal articulation driver is configured to
apply pushing and pulling motions to the cross link.
Example 48
[0542] The surgical instrument of Examples 41, 42, 43, 44, 45, 46
or 47, wherein the surgical end effector comprises a firing member
that is configured for axial travel within the surgical end
effector and wherein the elongate shaft assembly further comprises
an axially movable firing beam that operably interfaces with the
firing member and is selectively movable in a distal direction in
response to an application of a firing motion thereto and in a
proximal direction in response to a retraction motion applied
thereto.
Example 49
[0543] The surgical instrument of Example 48, further comprising a
middle support member that is configured to laterally support the
firing member when the surgical end effector is articulated about
the articulation axis. The middle support member is pivotally
coupled to the surgical end effector and is pivotally and slidably
supported relative to the elongate shaft assembly.
Example 50
[0544] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that includes
a proximal end that is pivotally coupled to the elongate shaft
assembly at an attachment location on the distal end of the
elongate shaft assembly for selective pivotal travel about an
articulation axis that extends transversely relative to the shaft
axis. An articulation drive assembly is supported for longitudinal
travel relative to the elongate shaft assembly along an
articulation actuation axis that is parallel to the shaft axis and
is spaced to a first lateral side of the shaft axis. The
articulation drive assembly is coupled to the surgical end effector
at a single attachment location that is located on another lateral
side of the shaft axis.
Example 51
[0545] The surgical instrument of Example 50, wherein the
articulation drive assembly comprises a distal articulation driver
that is supported by the elongate shaft assembly for longitudinal
travel along the articulation actuation axis in response to
articulation control motions applied thereto. A cross link is
coupled to the distal articulation driver and extends transversely
across the shaft axis to be coupled to the surgical end effector at
the single attachment location.
Example 52
[0546] The surgical instrument of Examples 50 or 51, wherein the
proximal end of the surgical end effector is pivotally coupled to
the distal end of the elongate shaft assembly by a pivot member
that defines the articulation axis.
Example 53
[0547] The surgical instrument of Examples 51 or 52 wherein the
cross link has a curved shape.
Example 54
[0548] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that comprises
a proximal end that is pivotally coupled to the elongate shaft
assembly at an attachment location on the distal end of the
elongate shaft assembly for selective pivotal travel about an
articulation axis that extends transversely relative to the shaft
axis through a first range of articulation angles on a first
lateral side of the shaft axis and through a second range of
articulation angles on a second lateral side of the shaft axis. An
articulation drive assembly is supported for longitudinal travel
relative to the elongate shaft assembly along an articulation
actuation axis that is parallel to and laterally offset on one of
the first and second lateral sides of the shaft axis. The
articulation drive assembly is coupled to the surgical end effector
at a single attachment location that is located on the other one of
the first and second lateral sides of the shaft axis to selectively
apply pulling and pushing motions to the surgical end effector.
Example 55
[0549] The surgical stapling instrument of Example 54, wherein the
first range of articulation angles is between one degree and sixty
five degrees and wherein the second range of articulation angles is
between one degree and sixty five degrees.
Example 56
[0550] The surgical stapling instrument of Examples 54 or 55,
wherein the articulation drive assembly comprises a distal
articulation driver that is supported by the elongate shaft
assembly for longitudinal travel in response to articulation
control motions applied thereto. A cross link is coupled to the
distal articulation driver and extends transversely across the
shaft axis to be coupled to the surgical end effector at the
attachment location.
Example 57
[0551] The surgical stapling instrument of Example 56, wherein when
the distal articulation driver is moved in a distal direction, the
surgical end effector is pivoted in a first articulation direction
and when the distal articulation driver is moved in a proximal
direction, the surgical end effector is pivoted in a second
articulation direction.
Example 58
[0552] The surgical stapling instrument of Example 57, wherein the
surgical end effector comprises a firing member that is configured
for axial travel within the surgical end effector and wherein the
elongate shaft assembly further comprises an axially movable firing
beam that operably interfaces with the firing member and is
selectively movable in the distal direction in response to an
application of a firing motion thereto and in a proximal direction
in response to a retraction motion applied thereto.
Example 59
[0553] The surgical stapling instrument of Example 58, further
comprising a middle support member that is configured to laterally
support the firing member when the surgical end effector is
articulated about the articulation axis. The middle support member
is pivotally coupled to the surgical end effector and is pivotally
and slidably supported relative to the elongate shaft assembly.
Example 60
[0554] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis and includes a distal end. The surgical
instrument further comprises a surgical end effector that includes
a proximal end that is pivotally coupled to the elongate shaft
assembly for selective pivotal travel about an articulation axis
that extends transversely relative to the shaft axis. An
articulation link arrangement is configured for rotation relative
to the shaft axis such that rotation of the articulation link
arrangement induces articulation of the surgical end effector about
the articulation axis relative to the elongate shaft assembly. The
surgical instrument further comprises means for selectively
rotating the articulation link arrangement about the shaft
axis.
Example 61
[0555] The surgical instrument of Example 60, wherein the
articulation link arrangement comprises a central articulation link
that is movably coupled to the distal end of the elongate shaft
assembly. An end effector driver link is movably coupled to the
central articulation link for pivotal travel relative thereto. The
end effector driver link is operably coupled to the surgical end
effector for selective pivotal and axial travel relative thereto.
The means for selectively rotating comprises an articulation driver
that is supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. The articulation driver is operably coupled to the
central articulation link.
Example 62
[0556] The surgical instrument of Example 61, wherein the end
effector driver link comprises a proximal driver link end that is
pivotally coupled to the central articulation link and a distal
driver link end that comprises an axial slot that is configured to
slidably receive therein an end effector attachment member
therein.
Example 63
[0557] The surgical instrument of Example 62, wherein the proximal
driver link end is in meshing pivotal engagement with a distal end
of the elongate shaft assembly.
Example 64
[0558] The surgical instrument of Example 62, wherein the
articulation driver is movably coupled to the central articulation
link by an intermediate driver link.
Example 65
[0559] The surgical instrument of Examples 62, 63 or 64, wherein
the central articulation link is pivotally coupled to the distal
end of the elongate shaft assembly for pivotal travel relative
thereto about the articulation axis.
Example 66
[0560] The surgical instrument of Examples 62, 63, 64 or 65,
wherein the central articulation link comprises a triangular-shaped
link that is pivotally coupled to the distal end of the elongate
shaft assembly for pivotal travel relative thereto about the
articulation axis.
Example 67
[0561] The surgical instrument of Examples 62, 63, 64, 65 or 66,
wherein the surgical end effector defines an end effector axis that
is configured for axial alignment with the shaft axis when the
surgical end effector is in an unarticulated position and wherein
the articulation driver is supported for selective longitudinal
travel along one lateral side of the shaft axis and wherein the end
effector attachment member is located on a secondary lateral side
of the end effector shaft axis that corresponds to a second lateral
side of the shaft axis.
Example 68
[0562] The surgical instrument of Examples 62, 63, 64, 65, 66 or
67, wherein the distal end of the elongate shaft assembly comprises
an arcuate sun gear segment and wherein the end effector driver
link comprises a planet gear portion in meshing engagement with the
arcuate sun gear segment.
Example 69
[0563] The surgical instrument of Example 68, wherein the planet
gear portion comprises a plurality of planet gear teeth that is
formed on a proximal end of the end effector driver link.
Example 70
[0564] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further includes an
articulation system that comprises an articulation driver that is
supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. The articulation system further comprises means for
operably coupling the articulation driver to the surgical end
effector. The means for operably coupling is configured to apply
articulation motions to the surgical end effector in response to
longitudinal movement of the articulation driver. The means for
operably coupling is further configured to pivotally and axially
move relative to the surgical end effector.
Example 71
[0565] The surgical instrument of Example 70, wherein the
articulation driver is coupled to the means for operably coupling
on one lateral side of the shaft axis and wherein the means for
operably coupling is coupled to the surgical end effector on
another lateral side of the shaft axis.
Example 72
[0566] The surgical instrument of Examples 70 or 71, wherein the
surgical end effector comprises a firing member that is configured
for axial travel within the surgical end effector and wherein the
elongate shaft assembly further comprises an axially movable firing
beam that operably interfaces with the firing member and is
selectively movable in the distal direction in response to an
application of a firing motion thereto and in a proximal direction
in response to a retraction motion applied thereto.
Example 73
[0567] The surgical instrument of Examples 71 or 72, wherein the
means for operably coupling comprises a triangular shaped link that
comprises a first link corner portion that is operably coupled to
the articulation driver. The triangular shaped link further
comprises a second link corner portion that operably interfaces
with the surgical end effector and a third link corner portion that
is pivotally coupled to a distal end of the elongate shaft
assembly.
Example 74
[0568] The surgical instrument of Example 73, wherein the third
link corner portion is pivotally coupled to the distal end of the
elongate shaft assembly for pivotal travel relative thereto about
the articulation axis.
Example 75
[0569] The surgical instrument of Examples 73 or 74, wherein the
second corner portion of the triangular shaped link is operably
coupled to an end effector driver link that is coupled to the
surgical end effector for pivotal and axial travel relative
thereto.
Example 76
[0570] The surgical instrument of Examples 73, 74 or 75, wherein
the end effector driver link comprises an intermediate proximal
drive link end that is pivotally coupled to the triangular shaped
link and an end effector driver link end that comprises an axial
slot that is configured to slidably receive an end effector
attachment member therein.
Example 77
[0571] A surgical instrument comprising an elongate shaft assembly
that includes a distal end and a shaft axis. A surgical end
effector is pivotally coupled to the distal end of the elongate
shaft assembly for selective pivotal travel about an articulation
axis that is transverse to the shaft axis. A stationary sun gear
segment is on the distal end of the elongate shaft assembly. The
surgical instrument further comprises an end effector driver link
that includes a distal end that is coupled to the end effector for
pivotal and axial travel relative thereto and a proximal end that
comprises a planetary gear segment that is supported in meshing
engagement with the stationary sun gear segment. A selectively
movable articulation driver assembly operably interfaces with the
end effector driver link to apply articulation motions thereto.
Example 78
[0572] The surgical instrument of Example 77, wherein the
articulation driver assembly comprises an articulation driver
member that is supported for selective longitudinal travel relative
to the elongate shaft assembly in a distal direction and a proximal
direction along an axis that is offset from and parallel to the
shaft axis. A linkage assembly is coupled to the distal
articulation driver member at a first attachment location on one
side of the shaft axis. In addition, the linkage assembly is
further coupled to the end effector driver link.
Example 79
[0573] The surgical instrument of Examples 77 or 78, wherein the
surgical end effector comprises a firing member that is configured
for axial travel within the surgical end effector and wherein the
elongate shaft assembly further comprises an axially movable firing
beam that operably interfaces with the firing member and is
selectively movable in the distal direction in response to an
application of a firing motion thereto and in a proximal direction
in response to a retraction motion applied thereto.
Example 80
[0574] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further comprises an
articulation system that comprises a first articulation driver that
is supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. The articulation system further comprises a first end
effector link that is movably coupled to the surgical end effector.
The first end effector link is coupled to the first articulation
driver for axial and pivotal travel relative thereto. A second
articulation driver is supported for selective longitudinal travel
relative to the elongate shaft assembly in the distal and proximal
directions. A second end effector link is movably coupled to the
surgical end effector. The second end effector link is coupled to
the second articulation driver for axial and pivotal travel
relative thereto.
Example 81
[0575] The surgical instrument of Example 80, wherein the first end
effector link is coupled to the first articulation driver by a
first coupler member received within a first axial slot in the
first articulation driver for selective axial travel therein and
wherein the second end effector link is coupled to the second
articulation driver by a second coupler member received within a
second axial slot in the second articulation driver.
Example 82
[0576] The surgical instrument of Example 81, wherein the first
axial slot is parallel to the shaft axis and wherein the second
axial slot is parallel to the shaft axis.
Example 83
[0577] The surgical instrument of Examples 81 or 82, wherein the
first coupler member comprises a first pin sized to rotate and move
axially within the first axial slot and wherein the second coupler
member comprises a second pin sized to rotate and move axially
within the second axial slot.
Example 84
[0578] The surgical instrument of Examples 80, 81, 82 or 83,
wherein the first articulation driver is supported for selective
longitudinal travel along a first articulation axis that extends
along one lateral side of the shaft axis and wherein the second
articulation driver is supported for selective longitudinal travel
along a second articulation axis that extends along another lateral
side of the shaft axis.
Example 85
[0579] The surgical instrument of Examples 80, 81, 82, 83 or 84,
wherein the surgical end effector is configured to pivot about the
articulation axis through a first range of articulation angles on a
first lateral side of the shaft axis and through a second range of
articulation angles on a second lateral side of the shaft axis.
Example 86
[0580] The surgical instrument of Example 85, wherein the first
range of articulation angles is between one degree and sixty five
degrees and wherein the second range of articulation angles is
between one degree and sixty five degrees.
Example 87
[0581] The surgical instrument of Examples 80, 81, 82, 83, 84, 85
or 86, wherein the surgical end effector comprises a firing member
that is configured for axial travel within the surgical end
effector and wherein the elongate shaft assembly further comprises
an axially movable firing beam that operably interfaces with the
firing member and is selectively movable in the distal direction in
response to an application of a firing motion thereto and in the
proximal direction in response to a retraction motion applied
thereto.
Example 88
[0582] The surgical instrument of Examples 80, 81, 82, 83, 84, 85,
86 or 87, wherein the first end effector link is curved and wherein
the second end effector link is curved.
Example 89
[0583] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further comprises an
articulation system that comprises a first articulation driver that
is supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. A first end effector link is pivotably coupled to the
surgical end effector. The first end effector link is coupled to
the first articulation driver at a first attachment point. A second
articulation driver is supported for selective longitudinal travel
relative to the elongate shaft assembly in the distal and proximal
directions. A second end effector link is pivotably coupled to the
surgical end effector. The second end effector link is coupled to
the second articulation driver at a second attachment point. The
articulation system further comprises first means for constraining
travel of the first attachment point to a first path that has a
first predetermined shape and a first length. The articulation
system further comprises a second means for constraining travel of
the second attachment point to a second path that has a second
predetermined shape and a second length.
Example 90
[0584] The surgical instrument of Example 89, wherein the first
means for constraining comprises a first axial slot in a first
distal end of the first articulation driver and wherein the second
means for constraining comprises a second axial slot in a second
distal end of the second articulation driver.
Example 91
[0585] The surgical instrument of Example 90, wherein the first and
second axial slots are parallel to each other.
Example 92
[0586] The surgical instrument of Examples 89, 90 or 91, wherein
the first and second lengths are equal to each other.
Example 93
[0587] The surgical instrument of Examples 89, 90, 91 or 92,
wherein the first end effector link is pivotable about the first
attachment point and wherein the second end effector link is
pivotable about the second attachment point.
Example 94
[0588] The surgical instrument of Examples 89, 90, 91, 92 or 93
wherein the surgical end effector is configured to pivot about the
articulation axis through a first range of articulation angles on a
first lateral side of the shaft axis and through a second range of
articulation angles on a second lateral side of the shaft axis.
Example 95
[0589] The surgical instrument of Example 94, wherein the first
range of articulation angles is between one degree and sixty five
degrees and wherein the second range of articulation angles is
between one degree and sixty five degrees.
Example 96
[0590] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further comprises an
articulation system that comprises a first articulation driver that
is supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. A first curved end effector link is pivotably coupled to
the surgical end effector and is movably coupled to the first
articulation driver. A first pin protrudes from the first curved
end effector link and is movably received in a first axial slot in
the first articulation driver. A second articulation driver is
supported for selective longitudinal travel relative to the
elongate shaft assembly in the distal and proximal directions. A
second curved end effector link is pivotably coupled to the
surgical end effector and is movably coupled to the second
articulation driver. A second pin protrudes from the second curved
end effector link and is movably received in a second axial slot in
the second articulation driver.
Example 97
[0591] The surgical instrument of Example 96, wherein the first pin
is rotatable within the first axial slot and wherein the second pin
is rotatable in the second axial slot.
Example 98
[0592] The surgical instrument of Example 97, wherein the first and
second axial slots are parallel to each other.
Example 99
[0593] The surgical instrument of Examples 96, 97 or 98, wherein
the surgical end effector comprises a firing member that is
configured for axial travel within the surgical end effector and
wherein the elongate shaft assembly further comprises an axially
movable firing beam that operably interfaces with the firing member
and is selectively movable in the distal direction in response to
an application of a firing motion thereto and in the proximal
direction in response to a retraction motion applied thereto.
Example 100
[0594] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further comprises an
articulation system that comprises an articulation driver that is
supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. A central articulation link is pivotally coupled to the
elongate shaft assembly for pivotal travel relative thereto. An
intermediate link is movably coupled to the articulation driver and
the central articulation link. An end effector driver is movably
coupled to the central articulation link and the surgical end
effector.
Example 101
[0595] The surgical instrument of Example 100, wherein the central
articulation link is pivotally coupled to the elongate shaft
assembly for pivotal travel relative thereto about a link axis that
is offset from the articulation axis.
Example 102
[0596] The surgical instrument of Example 101, wherein the first
axial slot is parallel to the shaft axis and wherein the second
axial slot is parallel to the shaft axis.
Example 103
[0597] The surgical instrument of Examples 101 or 102, wherein the
central articulation link comprises a first central link end that
is movably coupled to the intermediate link and a second central
link end that is movably attached to the end effector driver and
wherein the first central link end is a first distance from the
link axis and wherein the second central link end is a second
distance from the link axis and wherein the first distance differs
from the second distance.
Example 104
[0598] The surgical instrument of Example 103, wherein the first
distance is less than the second distance.
Example 105
[0599] The surgical instrument of Examples 100, 101, 102, 103 or
104, wherein the central articulation link includes a first length
and the intermediate link includes a second length and wherein the
end effector driver includes a third length and wherein the second
length is shorter than the first and third lengths.
Example 106
[0600] The surgical instrument of Example 105, wherein the first
length is shorter than the third length.
Example 107
[0601] The surgical instrument of Examples 100, 101, 102, 103, 104,
105 or 106, wherein the intermediate link curves in a first
direction.
Example 108
[0602] The surgical stapling instrument of Example 107, wherein the
end effector driver curves in a second direction that is opposite
to the first direction.
Example 109
[0603] The surgical instrument of Examples 100, 101, 102, 103, 104,
105, 106, 107 or 108, wherein the surgical end effector is pushed
in a first articulation direction upon application of a pulling
motion to the articulation driver and wherein the surgical end
effector is pulled in a second articulation direction upon
application of a pushing motion to the articulation driver.
Example 110
[0604] The surgical instrument of Examples 100, 101, 102, 103, 104,
105, 106, 107, 108 or 109, wherein the surgical end effector is
selectively articulatable between an unarticulated position and
first articulated positions through a first range of articulation
angles and wherein the surgical end effector is articulatable
between the unarticulated position and second articulated positions
through a second range of articulation angles.
Example 111
[0605] The surgical instrument of Example 110 wherein the first
range of articulation angles is between one degree and ninety
degrees and wherein the second range of articulation angles is
between one degree and ninety degrees.
Example 112
[0606] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical instrument further includes an
articulation system that comprises an articulation driver that is
supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. A central articulation link is pivotally coupled to the
elongate shaft assembly for selective pivotal travel about a link
axis that is offset from the articulation axis. A curved
intermediate link is movably coupled to the articulation driver and
the central articulation link. A curved end effector driver is
movably coupled to the central articulation link and the surgical
end effector.
Example 113
[0607] The surgical instrument of Example 112, wherein the central
articulation link comprises a first central link end that is
movably coupled to the intermediate link and a second central link
end that is movably attached to the end effector driver and wherein
the first central link end is a first distance from the link axis
and wherein the second central link end is a second distance from
the link axis and wherein the first distance differs from the
second distance.
Example 114
[0608] The surgical instrument of Example 113, wherein the first
distance is less than the second distance.
Example 115
[0609] The surgical instrument of Examples 112, 113 or 114, wherein
the central articulation link includes a first length and the
intermediate link includes a second length and the end effector
driver includes a third length and wherein the second length is
shorter than the first and third lengths.
Example 116
[0610] The surgical instrument of Example 115, wherein the first
length is shorter than the third length.
Example 117
[0611] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective pivotal travel
about an articulation axis that extends transversely relative to
the shaft axis. The surgical end effector also comprises a firing
member that is configured for axial travel within the surgical end
effector. The surgical instrument further includes an articulation
system that comprises a distal articulation driver that is
supported for selective longitudinal travel relative to the
elongate shaft assembly in a distal direction and a proximal
direction. A central articulation link is movably pinned to the
distal end of the elongate shaft assembly. An intermediate link is
movably coupled to the distal articulation link and the central
articulation link. An end effector driver is movably coupled to the
central link and the surgical end effector.
Example 118
[0612] The surgical instrument of Example 117, wherein the surgical
end effector defines an end effector axis and wherein the surgical
end effector is selectively articulatable between a first
unarticulated position wherein the end effector axis is aligned
with the shaft axis and a first maximum articulated position on a
first lateral side of the shaft axis wherein the end effector axis
extends perpendicular to the shaft axis and a second maximum
articulated position on a second lateral side of the shaft axis
wherein the end effector axis is perpendicular to the shaft
axis.
Example 119
[0613] The surgical instrument of Examples 117 or 118, wherein the
central articulation link comprises a first central link end that
is movable coupled to the intermediate link and a second central
link end that is movably attached to the end effector driver and
wherein the first central link end is a first distance from the
link axis and wherein the second central link end is a second
distance from the link axis and wherein the first distance differs
from the second distance.
Example 120
[0614] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. The surgical instrument further
comprises a surgical end effector that comprising a distal end and
a proximal end. The proximal end is pivotally coupled to the
elongate shaft assembly for selective pivotal travel about an
articulation axis that extends transversely relative to the shaft
axis. The surgical end effector is selectively pivotable about the
articulation axis from an unarticulated position wherein the distal
end of the surgical end effector is located an unarticulated
distance from the articulation axis to articulated positions
wherein the distal end of the surgical end effector is located a
corresponding articulated distance from the articulation axis that
is less than the unarticulated distance.
Example 121
[0615] The surgical instrument of Example 120, wherein the elongate
shaft assembly comprises a pivot member that defines the
articulation axis and wherein the proximal end of the surgical end
effector comprises an elongate slot configured to slidably receive
the pivot member therein.
Example 122
[0616] The surgical instrument of Examples 120 or 121, further
comprising means for selectively applying articulation motions to
the surgical end effector.
Example 123
[0617] The surgical instrument of Example 122, wherein the means
for selectively applying comprises a rotary gear in meshing
engagement with the surgical end effector.
Example 124
[0618] The surgical instrument of Example 123, wherein the proximal
end of the surgical end effector comprises an elliptical gear
profile in meshing engagement with the rotary gear.
Example 125
[0619] The surgical instrument of Examples 123 or 124, wherein the
means for selectively applying comprises a selectively axially
moveable distal articulation driver that operably interfaces with
the rotary gear.
Example 126
[0620] The surgical instrument of Example 125, further comprising a
drive slot in the selectively axially movable distal articulation
driver and a drive pin that is attached to the rotary gear and is
slidably received in the drive slot.
Example 127
[0621] The surgical instrument of Examples 120, 121, 122, 123, 124,
125 or 126, wherein the surgical end effector defines an end
effector axis that is located such that when the surgical end
effector is in the unarticulated position, the end effector axis is
aligned with the shaft axis and wherein when the surgical end
effector is articulated to a full one of the articulated positions,
the end effector axis is perpendicular to the shaft axis.
Example 128
[0622] The surgical instrument of Examples 122, 123, 124, 125, 126
or 127, wherein the means for selectively applying comprises a
central articulation link that is supported for rotational travel
about the articulation axis. A selectively axially movable
articulation driver interfaces with the central articulation link
at a first location on a first side of the shaft axis. The means
for selectively applying further comprises an articulation drive
link that includes a first end that is coupled to the surgical end
effector and a second end that is coupled to the central
articulation link at a second location on a second side of the
shaft axis.
Example 129
[0623] The surgical instrument of Example 128, wherein the means
for selectively applying comprises a central articulation gear that
is supported for travel about the articulation axis and a gear
profile that is located on the second end of the articulation drive
link. The gear profile is in meshing engagement with the central
articulation gear.
Example 130
[0624] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis and includes a distal shaft portion. The
surgical instrument further comprises a surgical end effector that
defines an end effector axis and includes a distal end and a
proximal end. The proximal end is movably coupled to the distal
shaft portion for selective travel between an unarticulated
position wherein the end effector axis is aligned with the shaft
axis and the distal end of the surgical end effector is located an
unarticulated distance from the distal end portion of the elongate
shaft assembly to articulated positions wherein the end effector
axis is transverse to the shaft axis and the distal end of the
surgical end effector is located a corresponding articulated
distance from the distal shaft portion that is less than the
unarticulated distance.
Example 131
[0625] The surgical instrument of Example 130, wherein the proximal
end of the surgical end effector is movably coupled to the distal
shaft portion of the elongate shaft assembly by a selectively
axially movable articulation driver and an articulation link.
Example 132
[0626] The surgical instrument of Examples 130 or 131, wherein when
the surgical end effector is articulated in one of the articulated
positions, the end effector axis is perpendicular to the shaft
axis.
Example 133
[0627] A surgical instrument, comprising an elongate shaft assembly
that defines a shaft axis. The surgical instrument further
comprises a surgical end effector that includes a distal end and a
proximal end. The proximal end being is movably coupled to the
elongate shaft assembly for selective pivotal travel about an
articulation axis that extends transversely relative to the shaft
axis and translational travel relative to the articulation axis. An
articulation system operably interfaces with the surgical end
effector to selectively apply articulation motions thereto.
Example 134
[0628] The surgical instrument of Example 133, wherein the
articulation system comprises a rotary gear that is in meshing
engagement with the surgical end effector and means for rotating
the rotary gear.
Example 135
[0629] The surgical instrument of Example 134, further comprising
an elliptical gear segment on the proximal end of the surgical end
effector in meshing engagement with the rotary gear.
Example 136
[0630] The surgical instrument of Examples 134 or 135, wherein the
means for rotating the rotary gear comprises a selectively axially
moveable distal articulation driver that includes a drive slot and
a drive pin that is attached to the rotary gear and is slidably
received in the drive slot.
Example 137
[0631] The surgical instrument of Example 136, wherein the drive
slot is transverse to the shaft axis.
Example 138
[0632] The surgical instrument of Examples 133, 134, 135, 136 or
137, wherein the surgical end effector is configured to cut and
staple tissue.
Example 139
[0633] The surgical instrument of Examples 133, 134, 135, 136, 137
or 138, wherein the articulation system comprises a central
articulation link that is supported for rotational travel about the
articulation axis. A selectively axially movable articulation
driver interfaces with the central articulation link at a first
location on a first side of the shaft axis. The articulation system
further comprises an articulation drive link that includes a first
end that is coupled to the surgical end effector and a second end
that is coupled to the central articulation link at a second
location on a second side of the shaft axis.
Example 140
[0634] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective articulation
relative to the elongate shaft assembly about an articulation axis
that is transverse to the shaft axis. The surgical instrument
further comprises an articulation system that includes an
articulation cable that is coupled to the surgical end effector at
a point of attachment and is journaled on a proximal pulley that is
supported on the elongate shaft assembly. The proximal pulley
defines a proximal pulley axis that is located a tension distance
from the point of attachment. An articulation driver is coupled to
the articulation cable for selectively causing the articulation
cable to rotate about the proximal pulley in first and second
articulation directions. An adjustable tensioning assembly
interfaces with the proximal pulley to selectively adjust the
tensioning distance.
Example 141
[0635] The surgical instrument of Example 140, further comprising a
distal pulley that is attached to the surgical end effector and
defines the point of attachment.
Example 142
[0636] The surgical instrument of Example 141, wherein the distal
pulley defines the articulation axis.
Example 143
[0637] The surgical instrument of Examples 140, 141 or 142, wherein
the adjustable tensioning assembly comprises a pulley mount that
supports the proximal pulley thereon. A mounting shaft is coupled
to the pulley mount and is supported in a portion of the elongate
shaft assembly for selective rotation relative thereto. The
mounting shaft is eccentrically attached to the pulley mount such
that rotation of the mounting shaft causes the proximal pulley to
move axially to adjust the tension distance between the proximal
pulley axis and the point of attachment.
Example 144
[0638] The surgical stapling instrument of Example 143, wherein the
mounting shaft defines a mounting shaft axis that is offset from
the proximal pulley axis.
Example 145
[0639] The surgical instrument of Examples 140, 141 or 142, wherein
the adjustable tensioning assembly comprises a pulley mount that
supports the proximal pulley thereon. A mounting member is attached
to the pulley mount and is slidably supported on the elongate shaft
assembly for selective axial travel relative thereto. The
adjustable tensioning assembly further comprises means for
selectively axially moving the mounting member on the elongate
shaft assembly.
Example 146
[0640] The surgical instrument of Example 145, wherein the means
for selectively axially moving comprises a tensioning screw that is
mounted in the elongate shaft assembly and is configured to axially
move the mounting member within an axial slot in the elongate shaft
assembly.
Example 147
[0641] The surgical instrument of Example 145, wherein the means
for selectively axially moving comprises a rotary cam assembly that
is mounted in the elongate shaft assembly and is configured to
axially move the mounting member within an axial slot in the
elongate shaft assembly.
Example 148
[0642] The surgical instrument of Example 147, wherein the rotary
cam assembly comprises a tension cam that is configured for camming
contact with the mounting member. A mounting spindle is coupled to
the tension cam and is supported in a portion of the elongate shaft
assembly for selective rotation relative thereto. The mounting
spindle is attached to the tension cam such that rotation of the
mounting spindle in a first direction causes the tension cam to
axially bias the mounting member within the axial slot.
Example 149
[0643] The surgical instrument of Example 148, wherein the mounting
spindle has a knurled outer surface and is configured to be
received within a knurled hole in the portion of the elongate shaft
assembly.
Example 150
[0644] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective articulation
relative to the elongate shaft assembly about an articulation axis
that is transverse to the shaft axis. The surgical instrument
further comprises an articulation system that includes an
articulation cable that is journaled on a distal pulley that is
attached to the surgical end effector and a proximal pulley that is
supported on the elongate shaft assembly. An articulation driver is
coupled to the articulation cable for selectively causing the
articulation cable to rotate about the proximal pulley in first and
second rotation directions. An adjustable tensioning assembly is
supported on the elongate shaft assembly and is configured to
selectively contact a portion of the articulation cable in a
direction that is transverse to the first and second rotation
directions to increase an amount of tension in the articulation
cable.
Example 151
[0645] The surgical instrument of Example 150, wherein the
articulation cable comprises a first cable end and a second cable
end and wherein the first and second cable ends operably interface
with the articulation driver.
Example 152
[0646] The surgical instrument of Example 151, wherein the
articulation driver comprises a distal end portion that includes a
pair of cleats. The cleats define a mounting space therebetween.
The first cable end comprises a first lug attached to the cable
that is received within the mounting space and wherein the second
cable end comprises a second lug attached thereto and is received
within the mounting space between the pair of cleats.
Example 153
[0647] The surgical instrument of Examples 150, 151 or 152, wherein
the articulation cable is non-rotatably coupled to the distal
pulley.
Example 154
[0648] A surgical instrument comprising an elongate shaft assembly
that defines a shaft axis. A surgical end effector is pivotally
coupled to the elongate shaft assembly for selective articulation
relative to the elongate shaft assembly about an articulation axis
that is transverse to the shaft axis. The surgical instrument
further comprises an articulation system that includes an
articulation cable that is journaled on a distal pulley that is
attached to the surgical end effector and a proximal pulley that is
supported on the elongate shaft assembly. The articulation cable
comprises a first cable end and a second cable end. The
articulation system further comprises an articulation driver for
selectively causing the articulation cable to rotate about the
proximal pulley in first and second articulation directions. The
articulation driver includes a first cleat that is attached to the
first cable end and a second cleat that is attached to the second
cable end and is spaced from the first cleat. The articulation
system also includes means that is coupled to the first and second
cleats for moving the first and second cable ends toward each other
to increase an amount of tension in the articulation cable.
Example 155
[0649] The surgical instrument of Example 154, wherein the means
that is coupled to the first and second cleats for moving the first
and second cable ends toward each other comprises a rotary member
that is coupled to the first and second cleats such that rotation
of the rotary member in a first rotary direction causes the first
and second cleats to move toward each other and rotation of the
rotary member in a second rotary direction causes the first and
second cleats to move away from each other.
Example 156
[0650] The surgical instrument of Example 155, wherein the rotary
member comprises a tension screw that is in threaded engagement
with the first and second cleats.
Example 157
[0651] The surgical instrument of Example 154, wherein the first
cable end comprises a first lug that is attached to the cable that
is received between the first and second cleats and wherein the
second cable end comprises a second lug that is attached to the
cable and is received between the first and second cleats.
Example 158
[0652] The surgical instrument of Examples 154, 155, 156 or 157,
wherein the articulation cable is non-rotatably coupled to the
distal pulley.
Example 159
[0653] The surgical instrument of Examples 154, 155, 156, 157 or
158, wherein the surgical end effector is configured to cut and
staple tissue.
Example 160
[0654] A surgical instrument comprising a surgical end effector
that includes a first jaw and a second jaw, wherein one of the
first jaw and the second jaw is selectively movable relative to the
other of the first jaw and the second jaw upon application of a
closure motion to the surgical end effector. The surgical
instrument further comprises an elongate shaft assembly that
includes a closure member assembly that is supported for axial
travel relative to the surgical end effector. The closure member
assembly comprises a proximal closure member that is configured to
be axially advanced a complete closure stroke distance upon
application of a closure actuation motion thereto. A distal closure
member movably interfaces with the proximal closure member such
that the distal closure member moves an axial closure distance in
response to axial movement of the proximal closure member through
the complete closure stroke distance to thereby cause the distal
closure member to apply the closure motion to the surgical end
effector and wherein the axial closure distance is less than the
complete closure stroke distance.
Example 161
[0655] The surgical instrument of Example 160, wherein the proximal
closure member comprises a distal end and wherein the distal
closure member comprises a proximal end that is slidably affixed to
the distal end of the proximal closure member such that, as the
proximal closure member moves through the complete closure stroke
distance, the distal closure member does not begin to axially move
through the axial closure distance until the proximal closure
member has axially moved through a portion of the complete closure
stroke distance.
Example 162
[0656] The surgical instrument of Example 161, wherein the elongate
shaft assembly comprises a spine assembly that is coupled to the
surgical end effector and wherein the proximal closure member
comprises a proximal closure sleeve that is supported on a portion
of the spine assembly for axial travel through the complete closure
stroke distance thereon and wherein the distal closure member
comprises a distal closure sleeve that is slidably journaled on
another portion of the spine assembly and is movably coupled to the
proximal closure sleeve.
Example 163
[0657] The surgical instrument of Example 162, wherein the proximal
closure sleeve has an opening in a distal end thereof and wherein a
proximal end of the distal closure sleeve extends through the
opening and is configured to prevent the proximal end of the distal
closure sleeve from separating from the distal end of the proximal
closure sleeve.
Example 164
[0658] The surgical instrument of Example 163, wherein the distal
end of the proximal closure sleeve is flared inwardly around the
opening and wherein the proximal end of the distal closure sleeve
is flared outwardly to prevent the proximal end of the distal
closure sleeve from separating from the distal end of the proximal
closure sleeve while facilitating axial travel of the proximal
closure sleeve through a portion of the complete closure stroke
distance relative to the distal closure sleeve.
Example 165
[0659] The surgical instrument of Example 162, wherein the proximal
closure sleeve comprises an inwardly extending flange that defines
an opening in a distal end thereof and wherein a proximal end of
the distal closure sleeve extends through the opening and comprises
an outwardly extending flange that cooperates with the inwardly
extending flange to prevent the proximal end of the distal closure
sleeve from separating from the distal end of the proximal closure
sleeve.
Example 166
[0660] The surgical instrument of Example 162, wherein the proximal
closure sleeve comprises a contact portion that is proximal to the
distal end of the proximal closure sleeve. The contact portion is
configured to axially contact the proximal end of the distal
closure sleeve after the proximal closure sleeve has axially
advanced through a predetermined portion of the complete closure
stroke distance.
Example 167
[0661] The surgical instrument of Example 166, wherein the contact
portion comprises a crimped portion of the proximal closure
sleeve.
Example 168
[0662] The surgical instrument of Example 166, wherein the contact
portion comprises at least one inwardly extending tab member that
is formed in the proximal closure sleeve and is orientated to
contact a corresponding portion of the proximal end of the distal
closure sleeve.
Example 169
[0663] The surgical instrument of Examples 166, wherein the contact
portion comprises an inwardly extending flange that is formed on a
stop member that is attached to an inside wall of the proximal
closure sleeve.
Example 170
[0664] A surgical instrument comprising a surgical end effector
that includes a first jaw and a second jaw, wherein one of the
first jaw and the second jaw is selectively movable relative to the
other of the first jaw and the second jaw upon application of a
closure motion to the surgical end effector. The surgical
instrument further comprises an elongate shaft assembly that
includes a closure member assembly that is supported for axial
travel relative to the surgical end effector. The closure member
assembly comprises a proximal closure member that is configured to
be axially advanced a complete closure stroke distance upon
application of a closure actuation motion thereto. A distal closure
member is supported for axial travel an axial closure distance that
is less than the complete closure stroke distance to apply the
closure motion to the surgical end effector. A closure stroke
reduction assembly interfaces with the proximal closure member and
the distal closure member such that, as the proximal closure member
moves through the complete closure stroke distance, the distal
closure member does not begin to axially move through the closure
distance until the proximal closure member has axially moved
through a portion of the complete closure stroke distance.
Example 171
[0665] The surgical instrument of Example 170, wherein the elongate
shaft assembly comprises a spine assembly that is coupled to the
surgical end effector and wherein the proximal closure member
comprises a proximal closure sleeve that is supported on a portion
of the spine assembly for axial travel through the complete closure
stroke distance thereon and wherein the distal closure member
comprises a distal closure sleeve that is slidably supported on
another portion of the spine assembly for axial travel through the
closure distance.
Example 172
[0666] The surgical instrument of Examples 170 or 171, wherein the
closure stroke reduction assembly comprises a proximal mounting
member coupled to the proximal closure sleeve for axial travel
therewith through the complete closure stroke distance and a distal
mounting member that is coupled to the distal closure sleeve for
axial travel therewith through the closure distance.
Example 173
[0667] The surgical instrument of Example 172, wherein the proximal
mounting member comprises a contact portion that is configured to
contact at least one of the proximal mounting member and the
proximal closure sleeve after the proximal closure sleeve has moved
through the portion of the complete closure stroke distance.
Example 174
[0668] The surgical instrument of Example 173, wherein the distal
mounting member defines a distal ledge and wherein the proximal
mounting member defines a proximal ledge that is spaced from the
distal ledge to form a distal travel zone therebetween and wherein
the contact portion is spaced from the at least one of the proximal
mounting member and the proximal closure sleeve to define a
proximal travel zone between the contact portion and the at least
one of the proximal mounting member and the proximal closure
sleeve.
Example 175
[0669] The surgical instrument of Example 174, wherein the proximal
travel zone has a proximal axial width and wherein the distal
travel zone has a distal axial width that differs from the proximal
axial width.
Example 176
[0670] The surgical instrument of Examples 172, 173, 174 or 175,
further comprising a biasing member that is located between the
proximal mounting member and the distal mounting member.
Example 177
[0671] The surgical instrument of Examples 174 or 175, further
comprising a biasing member that is supported within the distal
travel zone.
Example 178
[0672] A surgical instrument comprising a surgical end effector
that includes a first jaw and a second jaw wherein one of the first
jaw and the second jaw is selectively movable relative to the other
of the first jaw and the second jaw upon application of a closure
motion to the surgical end effector. The surgical instrument
further comprises an elongate shaft assembly that includes a
closure member assembly that is supported for axial travel relative
to the surgical end effector. The closure member assembly comprises
a proximal closure member that is configured to be axially advanced
a complete closure stroke distance upon application of a closure
actuation motion thereto. The proximal closure member is configured
to apply a maximum closure force upon reaching an end of the
maximum closure stroke distance. A distal closure member is
supported for axial travel an axial closure distance that is less
than the complete closure stroke distance to apply the closure
motion to the surgical end effector. A closure stroke reduction
assembly interfaces with the proximal closure member and the distal
closure member such that, as the proximal closure member moves
through the complete closure stroke distance, the proximal closure
member applies another closure force to the distal closure member
that is less than the maximum closure force.
Example 179
[0673] The surgical instrument of Example 178, wherein the closure
stroke reduction assembly comprises a proximal mounting member that
is coupled to the proximal closure member for axial travel
therewith through the complete closure stroke distance. A distal
mounting member is coupled to the distal closure member for axial
travel therewith through the axial closure distance. A biasing
member is located between a portion of the proximal mounting member
and another portion of the distal mounting member.
[0674] The entire disclosures of:
[0675] U.S. Pat. No. 5,403,312, entitled ELECTROSURGICAL HEMOSTATIC
DEVICE, which issued on Apr. 4, 1995;
[0676] U.S. Pat. No. 7,000,818, entitled SURGICAL STAPLING
INSTRUMENT HAVING SEPARATE DISTINCT CLOSING AND FIRING SYSTEMS,
which issued on Feb. 21, 2006;
[0677] U.S. Pat. No. 7,422,139, entitled MOTOR-DRIVEN SURGICAL
CUTTING AND FASTENING INSTRUMENT WITH TACTILE POSITION FEEDBACK,
which issued on Sep. 9, 2008;
[0678] U.S. Pat. No. 7,464,849, entitled ELECTRO-MECHANICAL
SURGICAL INSTRUMENT WITH CLOSURE SYSTEM AND ANVIL ALIGNMENT
COMPONENTS, which issued on Dec. 16, 2008;
[0679] U.S. Pat. No. 7,670,334, entitled SURGICAL INSTRUMENT HAVING
AN ARTICULATING END EFFECTOR, which issued on Mar. 2, 2010;
[0680] U.S. Pat. No. 7,753,245, entitled SURGICAL STAPLING
INSTRUMENTS, which issued on Jul. 13, 2010;
[0681] U.S. Pat. No. 8,393,514, entitled SELECTIVELY ORIENTABLE
IMPLANTABLE FASTENER CARTRIDGE, which issued on Mar. 12, 2013;
[0682] U.S. patent application Ser. No. 11/343,803, entitled
SURGICAL INSTRUMENT HAVING RECORDING CAPABILITIES; now U.S. Pat.
No. 7,845,537;
[0683] U.S. patent application Ser. No. 12/031,573, entitled
SURGICAL CUTTING AND FASTENING INSTRUMENT HAVING RF ELECTRODES,
filed Feb. 14, 2008;
[0684] U.S. patent application Ser. No. 12/031,873, entitled END
EFFECTORS FOR A SURGICAL CUTTING AND STAPLING INSTRUMENT, filed
Feb. 15, 2008, now U.S. Pat. No. 7,980,443;
[0685] U.S. patent application Ser. No. 12/235,782, entitled
MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT, now U.S. Pat. No.
8,210,411;
[0686] U.S. patent application Ser. No. 12/249,117, entitled
POWERED SURGICAL CUTTING AND STAPLING APPARATUS WITH MANUALLY
RETRACTABLE FIRING SYSTEM, now U.S. Pat. No. 8,608,045;
[0687] U.S. patent application Ser. No. 12/647,100, entitled
MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT WITH ELECTRIC ACTUATOR
DIRECTIONAL CONTROL ASSEMBLY, filed Dec. 24, 2009; now U.S. Pat.
No. 8,220,688;
[0688] U.S. patent application Ser. No. 12/893,461, entitled STAPLE
CARTRIDGE, filed Sep. 29, 2012, now U.S. Pat. No. 8,733,613;
[0689] U.S. patent application Ser. No. 13/036,647, entitled
SURGICAL STAPLING INSTRUMENT, filed Feb. 28, 2011, now U.S. Pat.
No. 8,561,870;
[0690] U.S. patent application Ser. No. 13/118,241, entitled
SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENT
ARRANGEMENTS, now U.S. Pat. No. 9,072,535;
[0691] U.S. patent application Ser. No. 13/524,049, entitled
ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FIRING DRIVE, filed
on Jun. 15, 2012; now U.S. Pat. No. 9,101,358;
[0692] U.S. patent application Ser. No. 13/800,025, entitled STAPLE
CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, filed on Mar. 13, 2013,
now U.S. Patent Application Publication No. 2014/0263551;
[0693] U.S. patent application Ser. No. 13/800,067, entitled STAPLE
CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, filed on Mar. 13, 2013,
now U.S. Patent Application Publication No. 2014/0263552;
[0694] U.S. Patent Application Publication No. 2007/0175955,
entitled SURGICAL CUTTING AND FASTENING INSTRUMENT WITH CLOSURE
TRIGGER LOCKING MECHANISM, filed Jan. 31, 2006; and
[0695] U.S. Patent Application Publication No. 2010/0264194,
entitled SURGICAL STAPLING INSTRUMENT WITH AN ARTICULATABLE END
EFFECTOR, filed Apr. 22, 2010, now U.S. Pat. No. 8,308,040, are
hereby incorporated by reference herein.
[0696] Although the various embodiments of the devices have been
described herein in connection with certain disclosed embodiments,
many modifications and variations to those embodiments may be
implemented. Also, where materials are disclosed for certain
components, other materials may be used. Furthermore, according to
various embodiments, a single component may be replaced by multiple
components, and multiple components may be replaced by a single
component, to perform a given function or functions. The foregoing
description and following claims are intended to cover all such
modification and variations.
[0697] The devices disclosed herein can be designed to be disposed
of after a single use, or they can be designed to be used multiple
times. In either case, however, the device can be reconditioned for
reuse after at least one use. Reconditioning can include any
combination of the steps of disassembly of the device, followed by
cleaning or replacement of particular pieces, and subsequent
reassembly. In particular, the device can be disassembled, and any
number of the particular pieces or parts of the device can be
selectively replaced or removed in any combination. Upon cleaning
and/or replacement of particular parts, the device can be
reassembled for subsequent use either at a reconditioning facility,
or by a surgical team immediately prior to a surgical procedure.
Those skilled in the art will appreciate that reconditioning of a
device can utilize a variety of techniques for disassembly,
cleaning/replacement, and reassembly. Use of such techniques, and
the resulting reconditioned device, are all within the scope of the
present application.
[0698] By way of example only, aspects described herein may be
processed before surgery. First, a new or used instrument may be
obtained and when necessary cleaned. The instrument may then be
sterilized. In one sterilization technique, the instrument is
placed in a closed and sealed container, such as a plastic or TYVEK
bag. The container and instrument may then be placed in a field of
radiation that can penetrate the container, such as gamma
radiation, x-rays, or high-energy electrons. The radiation may kill
bacteria on the instrument and in the container. The sterilized
instrument may then be stored in the sterile container. The sealed
container may keep the instrument sterile until it is opened in a
medical facility. A device also may be sterilized using any other
technique known in the art, including but not limited to beta or
gamma radiation, ethylene oxide, plasma peroxide, or steam.
[0699] While this invention has been described as having exemplary
designs, the present invention may be further modified within the
spirit and scope of the disclosure. This application is therefore
intended to cover any variations, uses, or adaptations of the
invention using its general principles.
[0700] Any patent, publication, or other disclosure material, in
whole or in part, that is said to be incorporated by reference
herein is incorporated herein only to the extent that the
incorporated materials does not conflict with existing definitions,
statements, or other disclosure material set forth in this
disclosure. As such, and to the extent necessary, the disclosure as
explicitly set forth herein supersedes any conflicting material
incorporated herein by reference. Any material, or portion thereof,
that is said to be incorporated by reference herein, but which
conflicts with existing definitions, statements, or other
disclosure material set forth herein will only be incorporated to
the extent that no conflict arises between that incorporated
material and the existing disclosure material.
* * * * *