U.S. patent application number 15/943689 was filed with the patent office on 2018-10-11 for handle mechanism providing unlimited roll.
The applicant listed for this patent is Shorya AWTAR, Gregory Brian BOWLES, James Duncan GEIGER, James Michael LICHT, Deepak SHARMA, Zachary ZIMMERMAN. Invention is credited to Shorya AWTAR, Gregory Brian BOWLES, James Duncan GEIGER, James Michael LICHT, Deepak SHARMA, Zachary ZIMMERMAN.
Application Number | 20180289384 15/943689 |
Document ID | / |
Family ID | 58427923 |
Filed Date | 2018-10-11 |
United States Patent
Application |
20180289384 |
Kind Code |
A1 |
BOWLES; Gregory Brian ; et
al. |
October 11, 2018 |
HANDLE MECHANISM PROVIDING UNLIMITED ROLL
Abstract
Devices having a handle that provides unlimited roll to an
end-effector at the distal end of the device. For example,
described herein are medical devices that have an elongate tool
frame, an end-effector, and a handle that includes: a first
portion, a second portion that rolls relative to the first portion,
a push rod within the first portion connected to a control input,
and a shuttle body within the second portion that rotates with the
second portion but is axially driven by the push rod when the user
actuates the control input. The device may include a proximal
wrist/forearm attachment allowing one or more degrees of freedom in
pitch, yaw or roll about the user's arm. The handle may articulate
relative to the tool frame, and this articulation may be
transmitted to the end-effector. The end-effector may be a jaw
assembly.
Inventors: |
BOWLES; Gregory Brian;
(Fenton, MI) ; LICHT; James Michael; (Howell,
MI) ; ZIMMERMAN; Zachary; (Waterford, MI) ;
AWTAR; Shorya; (Ann Arbor, MI) ; SHARMA; Deepak;
(Ann Arbor, MI) ; GEIGER; James Duncan; (Toledo,
OH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOWLES; Gregory Brian
LICHT; James Michael
ZIMMERMAN; Zachary
AWTAR; Shorya
SHARMA; Deepak
GEIGER; James Duncan |
Fenton
Howell
Waterford
Ann Arbor
Ann Arbor
Toledo |
MI
MI
MI
MI
MI
OH |
US
US
US
US
US
US |
|
|
Family ID: |
58427923 |
Appl. No.: |
15/943689 |
Filed: |
April 2, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/US2016/055195 |
Oct 3, 2016 |
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15943689 |
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62236835 |
Oct 2, 2015 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61B 17/00 20130101;
A61B 2017/00442 20130101; A61B 17/2909 20130101; A61B 2017/00424
20130101; A61B 2017/2927 20130101; A61B 17/062 20130101; A61B
2017/291 20130101; A61B 2017/00017 20130101; A61B 2017/00389
20130101; A61B 2017/2912 20130101; A61B 2017/003 20130101; A61B
2090/067 20160201; A61B 2017/0042 20130101; A61B 34/70 20160201;
A61B 2017/2929 20130101 |
International
Class: |
A61B 17/29 20060101
A61B017/29; A61B 34/00 20060101 A61B034/00 |
Claims
1-53. (canceled)
54. An unlimited roll handle assembly apparatus, the apparatus
comprising: a first handle portion, a second handle portion coupled
to the first handle portion so that the second handle portion has
one rotational degree of freedom in a first axis relative to the
first handle portion but is translationally constrained relative to
the first handle portion along the first axis, a push rod coupled
to the first handle portion so that it has one degree of freedom
along the first axis relative to the first handle portion but is
rotationally constrained about the first axis relative to the first
handle portion, and a shuttle body coupled to the push rod so that
it has one rotational degree of freedom about the first axis
relative to the push rod but is translationally constrained along
the first axis relative to the push rod, further wherein the
shuttle body is coupled to the second handle portion so that it has
one degree of freedom along the first axis relative to the second
handle portion and is rotationally constrained about the first axis
relative to the second handle portion.
55. The apparatus of claim 54, further comprising an end-effector
control input on the first handle portion configured to translate
the push rod along the first axis.
56. The apparatus of claim 55 wherein the end-effector control
input comprises a trigger, lever or button on the first handle
portion configured for actuation by one or more of a user's fingers
and thumb.
57. The apparatus of claim 54, wherein the second handle portion
comprises a knob or dial having a grip configured to be rotated by
one or more of a user's fingers and thumb.
58. The apparatus of claim 54, wherein the first handle portion
comprises a palm grip configured to be held in a user's palm.
59. The apparatus of claim 54, further comprising a tool frame and
an input joint between the handle assembly and the tool frame.
60. The apparatus of claim 59, wherein the input joint comprises a
pitch motion path encoding a pitch motion of the handle assembly
relative to the tool frame about a pitch axis of rotation and a yaw
motion path, encoding a yaw motion of the handle assembly relative
to the tool frame about a yaw axis of rotation, wherein the pitch
axis of rotation and the yaw axis of rotation intersect in a center
of rotation that is proximal to the handle assembly.
61. The apparatus of claim 60, further wherein the center of
rotation coincides with a center of rotation of a user's wrist,
when the use is holding the device by the handle assembly.
62. The apparatus of claim 60, wherein the pitch motion path is
parallel with the yaw motion path so that the input joint is a
parallel kinematic joint.
63. The apparatus of claim 59, further comprising an elongate tool
shaft extending from the tool frame and having an end-effector at a
distal end of the elongate tool frame.
64. The apparatus of claim 59, further comprising a cuff having a
passage therethrough that is configured to hold a wrist or forearm
of a user, wherein the cuff is configured to couple to the tool
frame.
65. The apparatus of claim 63, wherein the rotation of the second
handle portion about the first axis is transmitted to the
end-effector because the tool frame is rotationally constrained
relative to the second handle portion and the end-effector is
rotationally constrained relative to the tool frame.
66. The apparatus of claim 63, further comprising an output joint
between the tool frame and the end-effector, wherein the pitch
motion path encodes pitch motion of the handle assembly relative to
the tool frame for transmission to the output joint but does not
encode yaw motion of the handle assembly relative to the tool frame
for transmission to the output joint, and wherein the yaw motion
path encodes yaw motion of the handle assembly relative to the tool
frame for transmission to the output joint but does not encode
pitch motion of the handle assembly relative to the tool frame for
transmission to the output joint.
67. The apparatus of claim 63 wherein the end-effector is
configured as a jaw assembly configured so that the actuation of
the end-effector control input opens or closes the jaw
assembly.
68. An unlimited roll handle assembly apparatus, the apparatus
comprising: a first handle portion; a second handle portion coupled
to the first handle portion so that the second handle portion has
one rotational degree of freedom in a first axis relative to the
first handle portion but is translationally constrained relative to
the first handle portion along the first axis; a push rod coupled
to the first handle portion so that it has one degree of freedom
along the first axis relative to the first handle portion but is
rotationally constrained about the first axis relative to the first
handle portion; an end-effector control input on the first handle
portion configured to translate the push rod along the first axis,
wherein the end-effector control input comprises a trigger, lever
or button on the first handle portion configured for actuation by
one or more of a user's fingers and thumb; and a shuttle body
coupled to the push rod so that it has one rotational degree of
freedom about the first axis relative to the push rod but is
translationally constrained along the first axis relative to the
push rod, further wherein the shuttle body is coupled to the second
handle portion so that it has one degree of freedom along the first
axis relative to the second handle portion and is rotationally
constrained about the first axis relative to the second handle
portion.
69. The apparatus of claim 68, wherein the second handle portion
comprises a knob or dial having a grip configured to be rotated by
one or more of a user's fingers and thumb.
70. The apparatus of claim 68, wherein the first handle portion
comprises a palm grip configured to be held in a user's palm.
71. The apparatus of claim 68, wherein the device further comprises
a tool frame and an input joint between the handle assembly and the
tool frame.
72. The apparatus of claim 71, wherein the input joint comprises a
pitch motion path encoding a pitch motion of the handle assembly
relative to the tool frame about a pitch axis of rotation and a yaw
motion path, encoding a yaw motion of the handle assembly relative
to the tool frame about a yaw axis of rotation, wherein the pitch
axis of rotation and the yaw axis of rotation intersect in a center
of rotation that is proximal to the handle assembly.
73. The apparatus of claim 72, further wherein the center of
rotation coincides with a center of rotation of a user's wrist,
when the use is holding the device by the handle assembly.
74. The apparatus of claim 72, wherein the pitch motion path is
parallel with the yaw motion path so that the input joint is a
parallel kinematic joint.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority as continuation of
International Patent Application No. PCT/US2016/055195 filed Oct.
3, 2016, titled "HANDLE MECHANISM PROVIDING UNLIMITED ROLL," now
International Publication No. WO2014-059442, which claims priority
to U.S. Provisional Patent Application No. 62/236,835, titled
"HANDLE ROTATION MECHANISM," filed on Oct. 2, 2015, each of which
is herein incorporated by reference in its entirety.
[0002] This application may also be related to U.S. patent
application Ser. No. 15/130,915, titled "ATTACHMENT APPARATUS FOR
REMOTE ACCESS TOOLS" filed on Apr. 15, 2016, which claimed priority
to U.S. Provisional Patent Application No. 62/147,998, titled
"FOREARM ATTACHMENT APPARATUS FOR REMOTE ACCESS TOOLS" filed on
Apr. 15, 2015, and U.S. Provisional Patent Application No.
62/236,805, titled "FOREARM ATTACHMENT APPARATUS FOR REMOTE ACCESS
TOOLS" filed on Oct. 2, 2015. This application may also be related
to U.S. patent application Ser. No. 15/054,068, titled "PARALLEL
KINEMATIC MECHANISMS WITH DECOUPLED ROTATIONAL MOTIONS" filed on
Feb. 25, 2016, which claims priority as a continuation-in-part to
U.S. patent application Ser. No. 14/166,503, titled "MINIMAL ACCESS
TOOL" filed on Jan. 28, 2014, Publication No. US-2014-0142595-A1,
which is a continuation of U.S. patent application Ser. No.
12/937,523, titled "MINIMUM ACCESS TOOL" filed on Apr. 13, 2009,
now U.S. Pat. No. 8,668,702, which claimed priority to U.S.
Provisional Patent Application No. 61/044,168, titled "MINIMALLY
INVASIVE SURGICAL TOOL" filed on Apr. 11, 2008. Each of these
patents and patent applications is herein incorporated by reference
in its entirety.
INCORPORATION BY REFERENCE
[0003] All publications and patent applications mentioned in this
specification are herein incorporated by reference in their
entirety to the same extent as if each individual publication or
patent application was specifically and individually indicated to
be incorporated by reference.
FIELD
[0004] Described herein are rotation mechanisms for inputs or
handles, and apparatuses and applications using them. For example,
described herein are handles with an unlimited rotation mechanism
("unlimited-roll handles") and apparatuses for minimally invasive
surgical tools and remote access tools using them.
BACKGROUND
[0005] A number of remote access tools and minimally invasive
surgical tools which incorporate handles with unlimited
("infinite") rotation mechanisms are known, for example, WO
2007/146894 A2. This application describes, for example,
laparoscopy tools primarily consisting of a proximal handle, a tool
frame/tool shaft and distal end-effector (EE). In some of these
laparoscopic devices, to rotate the end-effector about the tool
shaft axis (i.e., to provide a roll rotation of the end-effector),
the user may have to rotate the handle about its own center axis.
While the handle may fit or conform in the user's hand, palm,
and/or fingers in the nominal condition (i.e., prior to any roll
rotation), it may no longer continue to fit/conform with the user's
hand during and after the roll rotation. In fact, the handle may
start to collide with areas of the hand holding the device during
rotation, typically limiting the amount of roll rotation and/or
requiring repositioning of the handle within the surgeon's hand to
achieve maximum roll rotation at the end-effector. Thus, many of
these devices may require more than one hand to operate, or may
require repositioning of the device during operation within a
user's hand in order to continue to roll in a single direction
beyond a limited amount of roll. The process of repositioning
usually results in a loss of access to the input joint/mechanism
between the tool shaft/frame and handle and loss of ergonomics at
the handle to hand interface. Attempts have been made to address
the challenge of limited rotation and reduced ergonomics by
providing a rotational joint in the handle between the stationary
portion of the handle that is held by user's hand, palm, finger(s)
and/or thumb in the nominal condition and the roll portion that is
rotated with respect to the stationary portion about its center
axis by the user's finger(s) and/or thumb; these attempts have met
with only limited success, in part because rolling the device in
this manner may result in winding of internal cabling, including
actuating cables and the like when rolling the stationary portion
relative to the roll portion (e.g., dial, handle dial, rotation
dial or the like). The stationary portion of the handle is defined
stationary as far as roll rotation motion is concerned. This
stationary portion may move along with the user's hand to provide
other degree of freedoms (e.g., pitch and yaw rotations in
articulating laparoscopic devices).
[0006] These devices that incorporate the stationary portion and
roll portion in the handle assembly, may be articulating or
non-articulating. In some non-articulating devices, the handle and
tool shaft can be rigidly connected and rotation of the entire
handle may drive rotation of the tool shaft and end-effector. In
other non-articulating devices, the handle and tool shaft can be
rigidly connected and the handle may be equipped with a dial,
wherein the dial is connected to the end-effector and drives the
rotation of the end-effector via a roll transmission member routed
through the tool shaft. Furthermore, laparoscopic devices are
becoming more complex and catering to challenging laparoscopic
procedures. Laparoscopic tools may now include articulating
end-effectors that can be driven by an input joint between the tool
shaft and the handle. Articulating end-effectors enable the surgeon
to alter the axis of roll rotation at the end-effector by
articulating the handle about an input joint with respect to the
tool shaft. The handle in such device is not rigidly connected to
the tool shaft but instead connected via an input joint that
generally allows two articulation degrees of freedoms, e.g., yaw
rotation and pitch rotation, and constrains (and therefore
transmits) roll rotation. In some articulating devices, rotation of
the end-effector may be transmitted via rotation of the dial
portion of the handle, which further transmits roll to the
end-effector via rotation of tool shaft. Here, tool shaft is
connected to the handle via an input articulation joint providing
yaw and pitch degree of freedoms but transmits roll rotation from
the handle to the tool shaft. Similarly, the roll rotation of the
tool shaft is transmitted to the end-effector via the output
articulating joint. An example of such device configuration is an
articulation device sold by Novare.TM. (International Patent
Application Publication WO2007/146894 A2). In other articulating
devices, articulation transmission and roll transmission are
decoupled such that roll is directly transmitted from the rotation
of the dial portion of handle to the end-effector via a separate
roll transmission member and not via the kinematics of the input
articulation joint, tool shaft, and output articulation joint. This
roll transmission member may be torsionally stiff to transmit roll
rotation. This roll transmission member may or may not be routed
through the input articulation joint and/or the tool frame/tool
shaft. An example of such device configuration is an articulation
device sold by Covedien.TM. (U.S. Pat. No. 8,603,135). Some
articulating devices in aforementioned configuration provide
unlimited roll capability of the articulated end-effector, caused
by rotation of the handle dial about its own center axis.
[0007] Typically, the enhanced dexterity that these articulating
tools may offer comes with the tradeoff of increased resistance to
roll rotation of the handle, and therefore the end-effector, when
the end-effector, and therefore the handle, are articulated. This
resistance may get further exemplified when the handle input lever
to operate the end-effector actuation (e.g., opening and closing of
a moving portion of the end-effector relative to a reference
portion of the end-effector, that does not move relative to the
moving portion) is engaged while performing articulation as well as
roll rotation of the end-effector. Engagement of a handle input
lever to actuate opening/closing of an end-effector having a jaw at
the end of the tool shaft typically results in high loads generated
between the stationary portion of the handle held by the user and
the rotatable portion of the handle (dial) that interface with each
other to allow rotation. The result of the high load between these
independent bodies is typically an increase in frictional
resistance to roll rotation which limits the surgeon's ability to
use finesse rotation input at the handle to control the
end-effector roll rotation. The high jaw open/close actuation loads
are typically transmitted from the handle input by a transmission
member such as a steel cable, steel wire, etc. or a monofilament
steel or Nitinol rod, etc. These types of transmission members
function well to transfer loads to a remote portion of an
instrument, but, due to the complexity in providing articulation,
roll and actuation functionality to the end-effector in such
devices, as well as the limitation of working within a tight volume
to incorporate features to meet these functionalities, it is
challenging to incorporate joints and bodies that meet the
structural requirements to be able to provide the aforementioned
functionalities. One of the challenges may be the transmission of
roll from the handle to the end-effector and at the same time,
transmit end-effector actuation from the handle to the
end-effector.
[0008] Described herein are apparatuses (e.g., mechanisms, devices,
tools, machines, systems, etc.) including handles with an
unlimited-roll mechanism which may address these problems.
SUMMARY OF THE DISCLOSURE
[0009] Described herein are apparatuses (including mechanisms,
instruments, devices, tools, systems, etc.) that may include
handles (also referred to as handle assemblies) that provide
unlimited (e.g., "infinite") roll of a portion of the handle
relative to another portion of the handle, and may transmit this
roll to an end-effector in an advantageous manner. The
unlimited-roll mechanisms described herein may be part of an
apparatus that includes the handle, a tool frame (which may be a
tool shaft or may include a tool shaft) and an end-effector
assembly. In some variations, the apparatus may include an
end-effector assembly (or simply, end-effector) that can be
articulated with respect to the tool frame via an end-effector
articulating joint at the distal end of the device; articulation of
the end-effector may be controlled by an input articulation joint
(input joint) at the proximal end of the device, including between
the handle and the tool frame. In any of these apparatuses, the
tool frame may be interfaced with the arm (e.g., wrist, forearm,
etc.) of a user via an arm attachment (e.g., forearm attachment),
while the user's hand (palm, fingers, thumb, etc.) is interfaced
with the handle. The arm attachment may be connected to the tool
frame by a joint (e.g., a bearing) that allows one or more degrees
of freedom (e.g., pitch, yaw, roll) between the user's arm and the
tool frame. In any of these apparatuses, the end-effector may have
at least one moving portion (e.g., a moving jaw) that can be
actuated (e.g., opened/closed) by an input control on the handle
that causes an output actuation of the end-effector via an
end-effector jaw actuation member. In some of these apparatuses,
the jaw actuation transmission member may be a tension/compression
member which may be pulled by the input control in the handle to
cause end-effector actuation (say, jaw closure actuation). The same
or a different jaw actuation transmission member, either
tension/compression member may be used to cause the end-effector
actuation (say, jaw opening actuation), undoing the previous
actuation. This may lead to a pull (first actuation)-pull (second
actuation) operation as part of end-effector actuation or a pull
(first actuation)-push (second actuation) operation or a push
(first actuation)-pull (second actuation) operation.
[0010] In general, the unlimited-roll handles described herein may
also be referred to as unlimited rotation handles, or as unlimited
rotation handle apparatuses, or as unlimited-roll handle
apparatuses, or the like. In general, stationary portion of the
handle may also be referred to as a handle shell, or as an
ergonomic handle shell or as a handle body or as a first portion of
the handle or the like. In general, the rotational portion of the
handle may also be referred to as a rotation portion, or as a
rotation dial, or as a rotating portion, or as a dial or as a
second portion of the handle or the like. In general, the input
control in the handle assembly may also be referred to as a
control, or as an input lever, or as an end-effector control, or as
an input lever control or the like.
[0011] These unlimited-roll handles may allow actuation of a distal
end-effector (e.g., open and close of end-effector jaws) by an
input control on a first portion of the handle (e.g., a handle
body) using an end-effector actuation transmission member
comprising a cable (steel, tungsten, etc.), steel wire, etc. or a
monofilament steel or Nitinol rod, etc. to transmit actuation from
the handle without binding up or disruption of the end-effector
actuation. This actuation may happen independently, or in parallel,
or regardless of the other motions, for example, end-effector
articulation or end-effector roll rotation.
[0012] For example, when the end-effector is a jaw assembly, it may
include one or two moving jaws (second or third end-effector
portions) that are movable with respect to a base end-effector
portion (a first end-effector portion). In some variations, one of
the jaws of the jaw assembly may be part of (or rigidly attached
to) the base end-effector portion. The one or more movable jaws may
be moved by a jaw actuation transmission member that is connected
to the shuttle portion of the handle. This open/close action of the
jaws in the end-effector assembly may be controlled by an
end-effector control that may be a moving body (such as a lever,
button, slider, etc.) in the handle. Thus, disclosed herein are
unlimited-roll rotation mechanisms that may be part of an apparatus
that includes a corresponding rotation of an end-effector assembly,
while being able to cause the actuation of the end-effector (e.g.,
open/close motion) from an end-effector control input in the
handle.
[0013] The apparatuses described herein may be configured for use
in any application, including, but not limited to, medical devices
(e.g., surgical devices including minimally invasive devices such
as laparoscopes, endoscopes, etc.) and the like. For example, an
articulated unlimited-roll handle mechanism as described may be
used as part of a remote access tool that require finesse rotation
about a tool-shaft axis and manipulation or articulation of a tool
shaft and/or end-effector. In general, the apparatuses described
herein may be useful for a variety of purposes.
[0014] As will be described in greater detail herein, any of these
apparatuses may include a handle having multiple portions or bodies
that are coupled together to provide specific rotational and/or
translational degrees of freedom relative to each other, to provide
a ground portion that may be held within a user's hand (referred to
herein as a palm grip, hand grip, grip portion, or the like), and
to provide a rotating portion that may be operated by the fingers
(including the thumb) of the same hand holding the palm grip
(referred to herein as a knob, dial, finger dial, rotation dial
etc.). In some variations, the handle may be referred to as a
handle assembly, a handle mechanism, an unlimited-roll handle, an
infinite roll handle, or the like. In some variations the handle
includes four interconnected components (or bodies) and an
end-effector control input, such as a lever, button, dial or other
control, to actuate the end-effector. The four interconnected
bodies forming the handle may include a first handle portion (e.g.,
palm grip), a second handle portion (e.g., finger dial), a push rod
(typically, internal to the first handle portion) and a shuttle
body (typically, internal to the second handle portion). The push
rod is typically a rigid member and may alternatively be referred
to as a pull rod. The shuttle body typically connects to (or
includes) a portion of an end-effector actuation transmission
member, such as a transmission cable, for transmitting actuation of
the end-effector control input to the end-effector.
[0015] For example, a handle configured as an unlimited-roll handle
mechanism may include a first handle portion that is an outer
proximal body configured as a palm grip. Generically, this body may
be referred to as handle body A ("H.Body A"). The handle may also
include a second handle portion configured as an outer distal body,
which may be generically referred to as handle body B ("H.Body B").
These two bodies may be considered independent bodies with an
established joint where additional features may exist. Within the
joint between these two bodies, there may exist specific geometric
features such as ribs, surfaces, edges, washers, bushings,
bearings, lubricants, etc. which may function to offer some degrees
of freedom while constraining others. The joint of the outer bodies
may also be internally traversed by a secondary pair of bodies.
These secondary bodies may have portion of them, proximal or distal
to the joint between H.Body A and H.Body B. One of the secondary
body may be generically referred to herein as handle body C or
"H.Body C", and may be, e.g., a proximal push rod having a portion
of it connecting to H.Body A. The other secondary body may be
generically referred to herein as handle body D or "H.Body D" and
may be, e.g., a distal shuttle having a portion of it connecting to
H.Body B. Likewise, the joints between either of the inner
secondary bodies with respect to each other and with respect to the
outer two bodies may also comprise specific geometric features such
as ribs, surfaces, edges, washers, bushings, bearings, lubricants,
etc. which may function to offer some degrees of freedom while
constraining others. A generic description of this four-body
structure showing the degrees of constraint and degrees of freedom
is illustrated in FIG. 1. A four-body unlimited-roll handle such as
the one shown generically in FIG. 1 may be incorporated as part of
an articulating laparoscopic instrument, for example. A user (such
as a physician, doctor, surgeon, etc.) may hold the handle and
apply articulation input (causing pitch/yaw motion) through a joint
distal or proximal to the handle rotation mechanism. This
articulation input (pitch/yaw) joint may connect handle to the tool
frame/tool shaft. This articulation input may be transmitted to an
articulation output joint (pitch/yaw) at the distal end of the
instrument via an articulation transmission member(s). This
articulation output joint may connect the tool shaft/tool frame to
the end-effector or end-effector assembly. This transmission
member(s) connects to the articulation input joint and an output
articulating joint (proximal to the end-effector assembly). The
surgeon may then rotate the end-effector about its center/roll axis
(Axis 2) by rotation of the second portion or dial body (H.Body B)
relative to first portion of the handle, the proximal outer body
(H.Body A), about Axis 1. While holding (grounding) the proximal
outer body (H.Body A, e.g., a palm grip) in his/her palm, the user
may rotate the distal outer body (e.g., H.Body B, e.g., a rotation
dial) to drive rotation with a finesse twirling motion between the
thumb and forefinger. A rotation joint between H.Body A (first
portion) and H.Body B (second portion) presented in FIG. 1 may
function to reduce friction and relieve the user of strenuous
resistances which can otherwise be generated when the user also
chooses to activate the jaw closure, for example, by transferring
translation about a first axis (e.g., Axis 1 in FIG. 2) from H.Body
C to H.Body D and generating a force in the tension/compression
(jaw close/open) transmission member of the handle. As will be
described and illustrated in greater detail below, when the user
activates the end-effector input control at the handle, this motion
is transmitted to the translation of H.Body C along a first axis
with respect to H.Body A via a transmission mechanism in the
handle. The translation of H.Body C is further transmitted to the
translation of H.Body D, which is transmitted to an end-effector
via an end-effector actuation transmission member. While the
transmission happens, the surgeon can also infinitely rotate the
handle rotation mechanism clockwise or counterclockwise without
twisting the end-effector actuation transmission member due to
keying or constrained joints between H.Body B and H.Body D.
[0016] In variations in which the handle is used with an
articulating joint, such as articulating input joint between the
handle and the tool shaft, the articulation input joint may be a
parallel kinematic (P-K) joint (e.g., per U.S. Patent Application
Publication 2013/0012958 or U.S. Pat. No. 8,668,702), and/or a
virtual center (VC) joint (e.g., per U.S. Pat. No. 5,908,436), or a
parallel kinematic virtual center joint (e.g., per U.S. Pat. No.
8,668,702), or a serial kinematic (S-K) joint (e.g., per U.S. Pat.
No. 8,465,475 or U.S. Pat. No. 5,713,505), or a combination of a
serial kinematic and a parallel kinematic joint. The unlimited-roll
handles described herein may be particularly useful with
apparatuses that are articulating, e.g., having an articulating
input joint between the handle and the tool frame (e.g., tool
shaft). Here, transmission cables (that is compliant in
compression, torsion and bending, such as a rope, braided cable,
etc.) may be the effective end-effector actuation transmission
member and/or end-effector articulation member. These
highly-compliant transmission members, may be able to bend through
tight bend radii and provide effective transmission. Wire that is
torsionally stiff but compliant in bending may also be used for
either of the two aforementioned transmissions and/or for
end-effector rotation transmission. Articulation transmission
member(s), roll transmission member(s), and end-effector actuation
transmission member(s) may be distinct bodies, or they may be
combined into one body in a pair or triplet to perform intended
transmission. The transmission members may route through different
paths to link their respective joints. For example, an articulation
transmission member may be routed through the body of the tool
frame (e.g., tool shaft), or it may be routed externally to the
body of the tool shaft.
[0017] As mentioned above, any of the apparatuses described herein
may include an unlimited-roll handle and an arm (e.g., forearm)
attachment so that a proximal end region of the apparatus may be
connected to the user's arm/forearm. These apparatuses may permit
improved control of the apparatus when the apparatus is rigidly
coupled to the user's arm (e.g., having no degrees of freedom
between the apparatus and the user's arm), but may be particularly
helpful where the arm attachment permits one or more degrees of
freedom between the tool frame and the user's arm, such as one or
more of roll, pitch and/or yaw degrees of freedom.
[0018] For example, described herein are apparatuses, including
medical devices, comprising: an elongate tool frame having a
forearm attachment portion at a proximal end, the elongate frame
having a tool axis; an end-effector at a distal end of the elongate
tool frame; a handle that provides unlimited roll to the
end-effector, wherein the handle includes: a first handle portion,
a second handle portion coupled to the first handle portion so that
the second handle portion has one rotational degree of freedom in a
first axis relative to the first handle portion but is
translationally constrained relative to the first handle portion
along the first axis, a push rod completely or partially within the
first handle portion and coupled to the first handle portion so
that it has one translational degree of freedom along the first
axis relative to the first handle portion but is rotationally
constrained about the first axis relative to the first handle
portion, a shuttle body completely or partially within the second
handle portion, wherein the shuttle body is coupled to the push rod
so that it has one rotational degree of freedom about the first
axis relative to the push rod but is translationally constrained
along the first axis relative to the push rod, further wherein the
shuttle body is coupled to the second handle portion so that it has
one translational degree of freedom along the first axis relative
to the second handle portion, and an end-effector control input on
the first handle portion coupled to the push rod via a mechanism or
other transmission system and configured to translate the push rod
along the first axis, wherein the rotation of the second handle
portion about the first axis is transmitted to the end-effector so
that the end-effector rotates about its center axis in consequence
of the rotation of second handle portion; and a cuff having a
passage therethrough that is configured to hold a wrist or forearm
of a user, wherein the cuff is configured to couple to the forearm
attachment portion of the tool frame. In some instances, the
shuttle body may be completely outside the second handle
portion.
[0019] The forearm attachment portion and/or the cuff may be
configured to permit one or more degrees of freedom between the
cuff (which is typically rigidly attached to the user's arm) and
the forearm attachment portion. For example, the device may include
a joint between the forearm attachment portion of the tool frame
and the cuff, wherein the joint is configured to provide one or
more rotational degrees of freedom between the cuff and the forearm
attachment portion of the tool frame. The joint may be a bearing
(e.g., a machine element that constrains the relative motion to one
or more desired motions such as pitch, roll or yaw, and may reduce
friction between the moving parts). For example, the device may
include one or more joints between the forearm attachment portion
of the tool frame and the cuff, wherein the one or more joints are
configured to provide one or more of a roll degree of freedom with
respect to the tool axis, a pitch degree of freedom or a yaw degree
of freedom between the cuff and the forearm attachment portion of
the tool frame.
[0020] In general, the cuff may include a strap and/or securement
so that it may be attached securely to the users arm (e.g.,
forearm), and may be removable from the forearm attachment portion
so that it can be attached to the user's forearm, then snapped or
otherwise attached to the forearm attachment portion of the tool
frame.
[0021] In general, the unlimited roll between the second handle
portion and the first handle portion may be transmitted to the
end-effector. As mentioned, the roll between the second handle
portion and the first handle portion may be transmitted by a
transmission member that is separate from the tool frame, and may
be routed around or through the tool frame. For example, the
rotation of the second handle portion may be transmitted to the
end-effector through a rotation transmission extending between the
second handle portion and the end-effector. Alternatively, in some
variations the tool shaft transmits the roll between the second
handle portion and the first handle portion; for example, either
the second handle portion or the first handle portion may be
rigidly connected to the tool shaft so that a roll between the
second handle portion and the first handle portion is transmitted
by the tool frame to the end-effector at the distal end of the
apparatus. In general, because the unlimited roll between the
second handle portion and the first handle portion is relative
between the two, the transmission member for this roll may be
connected to either the second handle portion or the first handle
portion, although it is illustrated herein primarily as coupled to
the second handle portion (e.g., the knob or dial at a distal
region of the handle). For example, the rotation of the second
handle portion (e.g., the knob or dial) may be transmitted to the
end-effector because the elongate tool frame is coupled to the
second handle portion so that the elongate tool frame is
rotationally constrained relative to the second handle portion and
the end-effector is coupled to the elongate tool frame so that the
end-effector is rotationally constrained relative to the elongate
tool frame.
[0022] As mentioned, any of the apparatuses described herein may
include an input joint between the handle and the tool frame. For
example, any of these apparatuses may include an input joint
wherein the input joint provides a pitch degree of freedom between
the handle and the tool about a pitch axis of rotation and a yaw
degree of freedom between the handle and the tool about a yaw axis
of rotation. This input joint may be a parallel kinematic input
joint or a serial kinematic input joint or a combination of
parallel and serial kinematic input joint. For example, any of
these devices may include an input joint between the handle and the
tool frame and an output joint between the tool frame and the
end-effector, wherein the input joint comprises a pitch motion path
and a yaw motion path, further wherein the pitch motion path and
the yaw motion path are independent and coupled in parallel
(forming a parallel kinematic input joint) between the handle and
the tool frame, wherein the pitch motion path encodes pitch motion
of the handle relative to the tool frame for transmission to the
output joint but does not encode yaw motion of the handle relative
to the tool frame for transmission to the output joint, and wherein
the yaw motion path encodes yaw motion of the handle relative to
the tool frame for transmission to the output joint but does not
encode pitch motion of the handle relative to the tool frame for
transmission to the output joint. Alternatively, the pitch motion
path and the yaw motion path may be arranged in series (as a serial
kinematic input joint). However, as will be described herein, any
of the devices including an input joint having more than one degree
of freedom axis of rotation (e.g., pitch and yaw, pitch and roll,
yaw and roll, pitch, yaw and roll, etc.) may be configured so that
the two or more axes of rotation intersect at a center or rotation
(e.g., a virtual center of rotation) that is positioned behind
(proximal to) the handle, including at a virtual center of rotation
that would be within the user's wrist when the device is operated
by the user. For example, the pitch axis of rotation and the yaw
axis of rotation may intersect in a center of rotation that is
proximal to the handle.
[0023] In any of the variations including an input joint having
multiple (e.g., pitch and yaw) degrees of freedom, one or more
transmission members may be included to transmit the motion (e.g.,
pitch motion, yaw motion) to the output joint and therefore the
end-effector. For example, a device may include a pitch
transmission member and a yaw transmission member extending from
the input joint to the output joint, wherein the pitch transmission
member transmits pitch rotations and the yaw transmission member
transmits yaw rotations of the input joint to corresponding
rotations of the output joint.
[0024] As mentioned, any appropriate end-effector may be used. The
end-effector may or may not have grasping jaws (or simply jaws)
that may or may not move. For example, the end-effector may have a
soft end to spread delicate tissues (e.g., dissector) or a camera
or a laser pointer. Therefore, an end-effector assembly or
end-effector bodies may be referred as end-effector jaws, or as
jaws, or as an end-effector or the like. The end-effector may also
have one or more moving jaws, one or more stationary jaws
(stationary with respect to moving jaws), or other bodies required
for end-effector actuation. In some examples, an end-effector may
be configured as a jaw assembly that include jaws that open and
close. The end-effector control input on the handle may be
actuated, e.g., by a user's finger or fingers, including the user's
thumb, of the same hand holding the handle. For example, any of
these devices may include an end-effector that is configured as a
jaw assembly so that the actuation of the end-effector control
input opens or closes the jaw assembly. The end-effector control
input may be operated to hold the jaws open or closed (e.g., by
continuing to actuate the end-effector control input). For example,
when the end-effector control input is a trigger or lever on the
handle, holding the trigger or lever down may hold the jaws closed,
whereas releasing the trigger or lever may release/open the
jaws.
[0025] The end-effector may generally be configured as an assembly
having multiple portions that are coupled together to allow
relative motion between the parts. For example, the end-effector
may include a second end-effector portion that is movably coupled
to a first end-effector portion; and the apparatus (e.g., device)
may further include a transmission cable connecting the shuttle
body to the second end-effector portion so that actuation of the
end-effector control input on the handle moves the second
end-effector portion relative to the first end-effector portion
when the second handle portion is in any rotational position about
the first axis relative to the first handle portion. As mentioned,
the transmission cable may be a rope or braided material that is
compliant in compression, torsion and bending.
[0026] The end-effector control input may be any appropriate
control, including but not limited to a trigger, lever or button,
which is typically positioned on the first handle portion and
configured for actuation by one or more of a user's fingers or
thumb. This end-effector control input may be connected to the push
rod (H.Body C) via. an input transmission mechanism which takes
input from the end-effector control input and outputs a translation
of the push rod (H.Body C) along a first axis.
[0027] For example, a medical device having an unlimited-roll
handle may include: an elongate tool frame having a forearm
attachment portion at a proximal end, the elongate frame having a
tool axis; an end-effector at a distal end of the elongate tool
frame; a handle that provides unlimited roll to the end-effector,
wherein the handle includes: a first handle portion, a second
handle portion coupled to the first handle portion so that the
second handle portion has one rotational degree of freedom in a
first axis relative to the first handle portion but is
translationally constrained relative to the first handle portion
along the first axis, a push rod within the first handle portion
and coupled to the first handle portion so that it has one
translational degree of freedom along the first axis relative to
the first handle portion but is rotationally constrained about the
first axis relative to the first handle portion, a shuttle body
within the second handle portion, wherein the shuttle body is
coupled to the push rod so that it has one rotational degree of
freedom about the first axis relative to the push rod but is
translationally constrained along the first axis relative to the
push rod, further wherein the shuttle body is coupled to the second
handle portion so that it has one translational degree of freedom
along the first axis relative to the second handle portion, and an
end-effector control input on the first handle portion coupled to
the push rod and configured to translate the push rod along the
first axis, wherein rotation of the second handle portion is
transmitted to the end-effector so that the end-effector rotates
with the second handle portion; and a cuff having a passage
therethrough that is configured to hold a wrist or forearm of a
user; and a joint between the forearm attachment portion of the
tool frame and the cuff, wherein the joint provide one or more of a
roll degree of freedom, a pitch degree of freedom or a yaw degree
of freedom between the cuff and the forearm attachment portion of
the tool frame, and wherein actuation of the end-effector control
input on the handle actuates the end-effector when the second
handle portion is in any rotational position about the first axis
relative to the first handle portion.
[0028] In general, any of these apparatuses may include an
unlimited-roll handle in which the shuttle body portion of the
handle assembly is keyed to the knob/dial portion of the handle
(e.g., second handle portion). Thus, the shuttle body may be
coupled to the second handle portion so that it has one
translational degree of freedom along the first axis relative to
the second handle portion but is rotationally constrained about the
first axis relative to the second handle portion. As mentioned
above, the shuttle includes the structure(s) that couple to the
transmission member transmitting the end-effector control input
(such as an end-effector actuation transmission) to the
end-effector.
[0029] Also described herein are apparatuses including an
unlimited-roll handle in which the apparatus is configured to
articulate, e.g., between the handle and the tool shaft, with or
without an arm attachment. For example, described herein are
medical devices comprising: an end-effector at a distal end of an
elongate tool frame; a handle that provides unlimited roll to an
end-effector, wherein the handle includes: a first handle portion,
a second handle portion coupled to the first handle portion so that
the second handle body has one rotational degree of freedom in a
first axis relative to the first handle portion but is
translationally constrained relative to the first handle portion
along the first axis, a push rod within the first handle portion
and coupled to the first handle portion so that it has one
translational degree of freedom along the first axis relative to
the first handle portion but is rotationally constrained about the
first axis relative to the first handle portion, a shuttle body
within the second handle portion, wherein the shuttle body is
coupled to the push rod so that it has one rotational degree of
freedom about the first axis relative to the push rod but is
translationally constrained along the first axis relative to the
push rod, further wherein the shuttle body is coupled to the second
handle portion so that it has one translational degree of freedom
along the first axis relative to the second handle portion but is
rotationally constrained about the first axis relative to the
second handle portion, and an end-effector control input on the
first handle portion coupled to the push rod and configured to
translate the push rod along the first axis, wherein rotation of
the second handle portion is transmitted to the end-effector so
that the end-effector rotates with the second handle portion; and
an input joint between the handle and the tool frame configured to
encode motion of the handle about a pitch axis of rotation relative
to the tool frame for transmission to an output joint, and further
configured to encode motion of the handle about a yaw axis of
rotation relative to the tool frame for transmission to an output
joint, wherein the pitch axis of rotation and the yaw axis of
rotation intersect in a center of rotation; wherein the
end-effector is coupled to the tool frame by the output joint.
Typically, actuation of the end-effector control input on the
handle may actuate the end-effector when the second handle portion
is in any rotational position relative to the first handle
portion.
[0030] As mentioned above, the center of rotation may be posterior
to the handle, and may be, for example, a virtual center of
rotation that would be within a user's arm or wrist when the
apparatus is held by a user. Any of these apparatuses may also
include an arm (e.g., forearm) attachment. For example, any of
these apparatuses may include a forearm attachment portion at a
proximal end of the tool frame, and a cuff having a passage
therethrough that is configured to hold a wrist or forearm of a
user, wherein the cuff is configured to couple to the forearm
attachment portion of the tool frame. The forearm attachment may
include a joint between the forearm attachment portion of the tool
frame and the cuff, wherein the joint is configured to provide one
or more rotational degrees of freedom between the cuff and the
forearm attachment portion of the tool frame.
[0031] The input joint between the handle and the tool shaft may be
referred to herein as a pitch and yaw input joint, and may comprise
a pitch motion path and a yaw motion path, as described above. For
example, the pitch motion path and the yaw motion path may be
independent and coupled in parallel between the handle and the tool
frame, wherein the pitch motion path encodes pitch motion of the
handle relative to the tool frame for transmission to the output
joint but does not encode yaw motion of the handle relative to the
tool frame for transmission to the output joint, and wherein the
yaw motion path encodes yaw motion of the handle relative to the
tool frame for transmission to the output joint but does not encode
pitch motion of the handle relative to the tool frame for
transmission to the output joint.
[0032] For example, a medical device may include: an end-effector
at a distal end of an elongate tool frame; a handle that provides
unlimited roll to an end-effector, wherein the handle includes: a
first handle portion, a second handle portion coupled to the first
handle portion so that the second handle body has one rotational
degree of freedom in a first axis relative to the first handle
portion but is translationally constrained relative to the first
handle portion along the first axis, a push rod within the first
handle portion and coupled to the first handle portion so that it
has one translational degree of freedom along the first axis
relative to the first handle portion but is rotationally
constrained about the first axis relative to the first handle
portion, a shuttle body within the second handle portion, wherein
the shuttle body is coupled to the push rod so that it has one
rotational degree of freedom about the first axis relative to the
push rod but is translationally constrained along the first axis
relative to the push rod, further wherein the shuttle body is
coupled to the second handle portion so that it has one
translational degree of freedom along the first axis relative to
the second handle portion but is rotationally constrained about the
first axis relative to the second handle portion, and an
end-effector control input on the first handle portion coupled to
the push rod and configured to translate the push rod along the
first axis, wherein rotation of the second handle portion is
transmitted to the end-effector so that the end-effector rotates
with the second handle portion; and an input joint between the
handle and the tool frame, the input joint comprising a pitch
motion path and a yaw motion path, further wherein the pitch motion
path and the yaw motion path are independent and coupled in
parallel between the handle and the tool frame, wherein the pitch
motion path encodes pitch motion of the handle relative to the tool
frame about a pitch axis of rotation for transmission to the output
joint but does not encode yaw motion of the handle relative to the
tool frame for transmission to the output joint, and wherein the
yaw motion path encodes yaw motion of the handle relative to the
tool frame about a yaw axis of rotation for transmission to the
output joint but does not encode pitch motion of the handle
relative to the tool frame for transmission to the output joint,
wherein the pitch axis of rotation and the yaw axis of rotation
intersect in a center of rotation that is proximal to the handle;
wherein the end-effector is coupled to the tool frame by the output
joint.
[0033] Any of these apparatuses may include an unlimited-roll
handle and an end-effector configured as a jaw assembly, either
with or without an arm (e.g., forearm) attachment and/or being
configured as an articulating device (e.g., including an input
joint such as a pitch and yaw input joint). For example, described
herein are medical devices including: an end-effector at a distal
end of an elongate tool frame; a handle that provides unlimited
roll to an end-effector, wherein the handle includes: a first
handle portion, a second handle portion coupled to the first handle
portion so that the second handle body has one rotational degree of
freedom in a first axis relative to the first handle portion but is
translationally constrained relative to the first handle portion
along the first axis, a push rod within the first handle portion
and coupled to the first handle portion so that it has one
translational degree of freedom along the first axis relative to
the first handle portion but is rotationally constrained about the
first axis relative to the first handle portion, a shuttle body
within the second handle portion, wherein the shuttle body is
coupled to the push rod so that it has one rotational degree of
freedom about the first axis relative to the push rod but is
translationally constrained along the first axis relative to the
push rod, further wherein the shuttle body is coupled to the second
handle portion so that it has one translational degree of freedom
along the first axis relative to the second handle portion but is
rotationally constrained about the first axis relative to the
second handle portion, and an end-effector control input on the
first handle portion coupled to the push rod and configured to
translate the push rod along the first axis, wherein rotation of
the second handle portion is transmitted to the end-effector so
that the end-effector rotates with the second handle portion;
wherein the end-effector includes a second end-effector portion
that is movably coupled to a first end-effector portion; and a
transmission cable connecting the shuttle body to the second
end-effector portion so that actuation of the end-effector control
input moves the second end-effector portion relative to the first
end-effector portion when the second handle portion is in any
rotational position with respect to the first axis relative to the
first handle portion. As mentioned, the end-effector may be a jaw
assembly configured so that actuation of the end-effector control
input opens or closes the jaw assembly. For example, the second
end-effector portion may comprise a jaw member that is pivotally
hinged to the first end-effector portion. The jaw assembly may also
include a third end-effector portion that is pivotally hinged to
the first end-effector portion and coupled to the transmission
cable so that actuation of the end-effector control input on the
handle moves the second and third end-effector portions relative to
the first end-effector portion.
[0034] As described above, any of these apparatuses may include a
forearm attachment portion at a proximal end of the tool frame and
a cuff having a passage therethrough that is configured to hold a
wrist or forearm of a user, wherein the cuff is configured to
couple to the forearm attachment portion of the tool frame; the
apparatus may also include a joint between the forearm attachment
portion of the tool frame and the cuff, wherein the joint is
configured to provide one or more rotational degrees of freedom
between the cuff and the forearm attachment portion of the tool
frame.
[0035] For example, a medical device may include: an end-effector
at a distal end of an elongate tool frame; a handle that provides
unlimited roll to an end-effector, wherein the handle includes: a
first handle portion, a second handle portion coupled to the first
handle portion so that the second handle body has one rotational
degree of freedom in a first axis relative to the first handle
portion but is translationally constrained relative to the first
handle portion along the first axis, a push rod within the first
handle portion and coupled to the first handle portion so that it
has one translational degree of freedom along the first axis
relative to the first handle portion but is rotationally
constrained about the first axis relative to the first handle
portion, a shuttle body within the second handle portion, wherein
the shuttle body is coupled to the push rod so that it has one
rotational degree of freedom about the first axis relative to the
push rod but is translationally constrained along the first axis
relative to the push rod, further wherein the shuttle body is
coupled to the second handle portion so that it has one
translational degree of freedom along the first axis relative to
the second handle portion but is rotationally constrained about the
first axis relative to the second handle portion, and an
end-effector control input on the first handle portion coupled to
the push rod and configured to translate the push rod along the
first axis, wherein rotation of the second handle portion is
transmitted to the end-effector so that the end-effector rotates
with the second handle portion; wherein the end-effector comprises
a jaw assembly including a first end-effector portion that is
movably coupled to a second end-effector portion, wherein the
second end-effector portion comprises a jaw member; and a
transmission cable connecting the shuttle body to the second
end-effector portion so that actuation of the end-effector control
input moves the second end-effector portion relative to the first
end-effector portion when the second handle portion is in any
rotational position with respect to the first axis relative to the
first handle portion to open or close the jaw assembly of the
end-effector.
[0036] Described herein are apparatuses (e.g., mechanisms, devices,
tools, machines, systems, etc.) including handles with an
unlimited-roll mechanism which may incorporate certain degrees of
freedoms and degrees of constraints between bodies in the handle
assembly and/or in the end-effector assembly, such that there is an
efficient transmission of articulation (pitch/yaw), roll as well as
end-effector actuation. This apparatuses may also incorporate
certain degrees of freedoms and degrees of constraints between
bodies in the handle assembly and/or in the end-effector assembly
by utilizing independent transmission members. These transmission
members may be end-effector articulation transmission member(s),
end-effector roll transmission member(s) and/or end-effector
actuation transmission members. These transmission members may be
independent, or two or more independent transmission members may be
combined to act like a single transmission member, if it helps with
efficient transmission of various functionalities.
BRIEF DESCRIPTION OF THE DRAWINGS
[0037] The novel features of the invention are set forth with
particularity in the claims that follow. A better understanding of
the features and advantages of the present invention will be
obtained by reference to the following detailed description that
sets forth illustrative embodiments, in which the principles of the
invention are utilized, and the accompanying drawings of which:
[0038] FIG. 1 is a constraint map of an unlimited-roll handle
(handle assembly) having four parts, illustrating the degrees of
freedom and degrees of constraint between the coupled
components.
[0039] FIG. 2 is a schematic of a conceptual model of an
unlimited-roll handle, illustrating the attributes of each
interface of four bodies forming the handle assembly.
[0040] FIG. 3A shows an example of an interface between two bodies
of an exemplary unlimited-roll handle assembly (e.g., H.Body A and
H.Body C) shown as a square slot and square key feature.
[0041] FIG. 3B shows an example of an interface between two bodies
of an exemplary unlimited-roll handle assembly (e.g., H.Body A and
H. Body C) with minimal keying surface between bodies causing a
rotational constraint.
[0042] FIG. 3C is an example of an interface between two bodies of
an exemplary unlimited-roll handle assembly (e.g., H.Body A and H.
Body C) shown as a D-Shaft and corresponding slot feature.
[0043] FIG. 3D is an example of a thrust bearing acting as
interface between two bodies of an unlimited-roll handle assembly
(e.g., H.Body A and H.Body B).
[0044] FIG. 3E shows an example of a portion of an unlimited-roll
handle assembly including a thrust bearing with side washers acting
as interface between H.Body A and H.Body B.
[0045] FIG. 3F shows an example of a washer acting as interface
between H.Body A and H.Body B in one example of an unlimited-roll
handle assembly.
[0046] FIG. 3G shows a bushing acting as interface between an
H.Body A and H.Body B of an unlimited-roll handle assembly.
[0047] FIG. 3H illustrates an exemplary H.Body A and H.Body B under
tensile load with thrust bearing acting as interface between them
as part of an unlimited-roll (e.g., roll) handle assembly.
[0048] FIGS. 3I.1 through 3I.4 respectively illustrate a thrust
needle bearing, a thrust roller bearing, a roller bearing and an
angular contact roller bearing, each of which may be used as part
of an unlimited-roll handle assembly.
[0049] FIG. 3J illustrates an example of a tapered roller bearing
that may be used as part of an unlimited-roll handle assembly.
[0050] FIG. 3K shows a radial bearing that may be used as part of
an unlimited-roll handle assembly.
[0051] FIG. 3L illustrates exemplary loading conditions applied on
different bodies of an unlimited-roll handle assembly.
[0052] FIG. 4A shows an example of an unlimited ("infinity") handle
as described herein, which is one realization of the constraint map
shown in FIG. 1 as an ergonomic handle.
[0053] FIG. 4B is an exploded view of the unlimited-roll handle
assembly of FIG. 4A, in which a first handle portion is configured
as a palm grip (H.Body A), a second handle portion is configured as
a dial (H.Body B), the push rod (H. Body C) is within the palm
grip, and a shuttle (H.Body D) is within the second handle portion.
An end-effector control input (e.g., handle lever) may be attached
to the palm grip to actuate the end-effector.
[0054] FIG. 5 illustrates one example of a medical device (e.g., a
laparoscopic device) incorporating an unlimited-roll handle
assembly such as the one shown in FIGS. 4A-4B, and described
herein.
[0055] FIG. 6 shows an example of a cuff that can couple with a
forearm attachment portion of a tool shaft of a medical device
including an unlimited-roll (roll) handle assembly. The cuff
includes a passage therethrough that is configured to hold a wrist
or forearm of a user, wherein the cuff is configured to couple to
the forearm attachment portion of the tool frame.
[0056] FIG. 7 shows another example of a medical device having an
unlimited-roll handle assembly and a jaw assembly end-effector,
such as the one shown in FIG. 5.
[0057] FIG. 8 is another view of a medical device having both an
unlimited-roll handle assembly and a distal end-effector configured
as a jaw assembly, wherein the distal end-effector is shown in an
articulated position with closed jaws, and the unlimited-roll
handle assembly is similar to that shown in FIGS. 4A-4B.
[0058] FIG. 9 shows another example of a medical device having both
an unlimited-roll handle assembly and a distal end-effector
configured as a jaw assembly, illustrating an end-effector
transmission connecting the rotation dial (H.Body B) to the
end-effector.
[0059] FIG. 10 shows an example of another apparatus including an
unlimited-roll handle assembly and a distal end-effector configured
as a jaw assembly, wherein the apparatus is a non-articulating
"straight stick" laparoscopic device.
[0060] FIG. 11 shows an example of another articulating medical
device using an unlimited-roll handle assembly such as the one
shown in FIGS. 4A-4B.
[0061] FIG. 12 is an example of an alternative unlimited-roll
handle assembly in which the palm grip (H.Body A) is distal to the
rotation dial (H.Body B).
[0062] FIG. 13 illustrates the use of a ratchet mechanism providing
for discrete rotational positioning of the associated rotation dial
of an unlimited-roll handle assembly.
[0063] FIG. 14 illustrates another embodiment of an apparatus using
an unlimited-roll handle assembly.
[0064] FIG. 15 is another example of an unlimited-roll handle
assembly coupled to an end-effector configured as a jaw
assembly.
[0065] FIG. 16 is a front perspective view of an exemplary surgical
device incorporating an unlimited-roll handle assembly and an arm
(forearm) attachment.
[0066] FIG. 17 is a side perspective view of an exemplary surgical
device incorporating an unlimited-roll handle assembly and an input
joint encoding pitch and yaw articulation by a parallel kinematic
mechanism, which provides for transmitting pitch and yaw motions to
an output joint located between the tool frame and the end-effector
(shown configured as a jaw assembly).
[0067] FIGS. 18A-18D show front perspective, left side perspective,
back perspective and right side perspective views, respectively, of
a medical device including an unlimited-roll handle assembly, an
end-effector configured as a jaw assembly, a proximal forearm
attachment and an input joint encoding pitch and yaw articulation,
the latter of which is transmitted to a output joint articulating
the end-effector. The pitch and yaw input joint has a center of
rotation--located where the pitch and yaw axes intersect--that
provide for a virtual center of rotation approximately within a
user's wrist when the apparatus is attached to the user.
[0068] FIG. 19A shows a side view of a portion of a medical device
corresponding to that shown in FIGS. 18A-18D, coupled to a user's
forearm with the unlimited-roll handle assembly held in the user's
hand.
[0069] FIG. 19B shows a slightly enlarged view of the device of
FIG. 19A.
[0070] FIG. 19C shows the device of FIG. 19A, in which the user is
articulating the handle in pitch and yaw relative to the tool
frame, illustrating that the end-effector jaws track the handle
position, with the tool frame rotated relative to the orientation
shown in FIGS. 19A and 19B.
[0071] FIG. 20A is a constraint map of the apparatus shown in FIGS.
18A-18D that includes an unlimited-roll handle, an input joint, an
output joint and an end-effector configured as a jaw assembly.
[0072] FIG. 20B shows an alternative constraint map for another
apparatus described herein.
DETAILED DESCRIPTION
[0073] Described herein are apparatuses including an unlimited-roll
handle assembly. Although the unlimited-roll handle assemblies
described herein may be incorporated into any apparatus (e.g.,
device, tool, system, machine, etc.), described herein in
particular are apparatuses including unlimited-roll handles
assemblies at a proximal region of an elongate tool frame (e.g., a
tool shaft or including a tool shaft) having an end-effector at the
distal end of the tool frame. The apparatus may include a forearm
attachment at the proximal end; the forearm attachment may allow
one or more degrees of freedom between the user's forearm and the
tool frame while the user's hand grips the unlimited-roll handle
assembly. The apparatus may be articulating; for example, the tool
frame may include an input joint between the unlimited-roll handle
assembly and the tool frame that may encode movement (e.g., pitch
and yaw movements) between the handle and the tool frame for
transmission to an output joint between the tool frame and an
end-effector, so that the end-effector may be moved as the handle
is moved. Although any appropriate end-effector may be used, in
some variations the end-effector is a jaw assembly that includes at
least a pair of jaws (end-effector portions), which move to open
and close the jaws when actuated by an end-effector control input
on the handle of the device.
[0074] In general, the unlimited-roll handle assemblies described
herein may be configured to have four (through in some cases only
three) or more parts interact together to provide unlimited
rotation of a knob or dial portion of the handle assembly about a
central axis relative to a palm grip portion of the handle, while
still permitting the actuation of an end-effector control input to
actuate the end-effector from any rotational position of the dial
portion relative to the palm grip. Rotation of the knob or dial
portion of the apparatus causes rotation of the end-effector, and
in some cases, also causes rotation of the tool frame.
[0075] A constraint map of an unlimited-roll handle assembly is
shown in FIG. 1, illustrating a conceptual model of the relative
degrees of freedom (DoF) and degrees of constraint (DoC) between
component portions of an unlimited-roll handle rotation mechanism.
The rotation mechanism typically comprises rigid bodies that are
generically referred to as: H.Body A 101, H.Body B 102, H.Body C
103, and H.Body D 104. H.Body A 101 may be referred to as the
reference ground, in that the motion of all other bodies may be
described with respect to H.Body A 101. For example, H.Body A 101
may be a palm grip. In general, any other of these bodies may be
used as the ground reference for describing the motion of the
remaining bodies.
[0076] Using H.Body A 101 as the ground reference, H.Body C 103 has
a single translational degree of freedom (DoF) 105' with respect to
H.Body A 101 along a first axis (e.g., Axis 1) and has rotational
constraint (DoC) 105'' with respect to H.Body A 101 about Axis 1.
This implies that relative translation along Axis 1 is allowed
between H.Body C 103 and H.Body A 101. However, relative rotation
about Axis 1 is not allowed between the two, and therefore
transmitted from one to the other and vice versa. H.Body B 102 has
a rotational DoF 106' with respect to H.Body A 101 about Axis 1 and
has translational constraint (DoC) 106'' with respect to H.Body A
101 along Axis 1. H.Body D 104 has a single translational DoF 107'
with respect to H.Body B 102 along Axis 1 and rotational DoF
constraint 107'' with respect to H.Body B 102 about Axis 1. H.Body
D 104 has a rotational DoF 108' with respect to H.Body C 103 about
Axis 1 and translational constraint (DoC) 108'' with respect to
H.Body C 103 along Axis 1.
[0077] FIG. 2 illustrates one example of an unlimited-roll handle
assembly fitting the constraint map shown in FIG. 1. Even though
FIG. 2 shows H.Body A 101 and H.Body B 102 to be cylindrical in
shape, the schematic diagram of FIG. 2 does not depict the actual
geometric features of each bodies, and these bodies can be of any
general shapes as long as they satisfy the joint
conditions/constraints between the various bodies as mentioned
above.
[0078] The constraint map of FIG. 1 results in the following
functionality of the rotation mechanism shown: using H.Body A 101
as a reference (i.e., assuming it to be stationary), this mechanism
allows for the independent rotation of H.Body B 102 with respect to
H.Body A 101 about Axis 1 111. While this happens, H.Body D 104
rotates along with H.Body B 102, also about Axis 1 111 and since
rotation of H.Body C 103 is coupled to rotation of H.Body A 101,
H.Body C 103 does not rotate. At the same time, any axial
translation of the non-rotating H.Body C 103 with respect to the
stationary H.Body A 101 along Axis 1 111 is transmitted to H.Body D
104, even as H.Body B 102 and H.Body D 104 rotate about Axis 1
111.
[0079] The joints within the rotation mechanism between the bodies
typically comprise interfacing geometries which selective allow or
prevent rotation or translation with respect to one another. For
those joints which enable rotation of one body with respect to
another, this joint may comprise one or more cylindrical surfaces,
and these surfaces can be enabled by a bearing, bushing, or
lubricious surface treatment which minimizes frictional
resistances. For translating joints, these surfaces may also
comprise a lubricious surface treatment. As an overall mechanism,
reduced frictional resistances to both translation and rotation
mean that simultaneous motion of H.Body D 104 can occur in both
rotation and translation while H.Body C 103 only translates and
H.Body B 102 only rotates, all with respect to H.Body A 101. Thus,
another way of describing the functionality of this constraint map
is that H.Body D 104 inherits the translation of H.Body C 103 and
the rotation of H.Body B 102. Considering this in reverse: H.Body D
104 has two DoF with respect to H.Body A 101, translation along
Axis 1 111 and rotation about Axis 1 111. Any arbitrary combination
of these two motions can be separated into translation only at
H.Body C 103 and rotation only at H.Body B 102.
[0080] Any of the joints described herein may be encoded for
transmission to an output (e.g., output joint). The encoding may be
done mechanically, electrically, or otherwise. For example, sensors
may be positioned at these two bodies, e.g., a linear displacement
sensor on H.Body C 103 and a rotary sensor on H.Body B 102 may give
discrete/individual values for arbitrary combination of rotation
and translation applied at H.Body D 104. These electrical signals
could then be transmitted via wired or wireless means to a
mechatronic, robotic, electronic, or computer-controlled system.
Alternatively, instead of sensors, one could place actuators at
these locations, e.g., a linear translational actuator between
H.Body A 101 and H.Body C 103 and a rotary actuator between H.Body
A 101 and H.Body B 102. Any arbitrary discrete/individual motion
inputs at these two bodies get added into a combined motion at
H.Body D 104 with respect to H.Body A 101. In general, the encoding
of movements at any of the joints described herein may be
mechanically encoded, for example, similar to that described below
for an input joint 1801 encoding pitch and yaw by operating a pair
of flexure transmission strips 533, 534 coupled to transmission
pulleys 1813.1, 1813.2 to separately and mechanically encode pitch
and yaw motions. However, other encoding techniques (electrical,
optical, etc.) may alternatively or additionally be used.
[0081] In general, the degree of freedom (DoF) implies that a
particular motion is allowed. Degree of constraint (DoC) implies
that a particular motion is constrained, and therefore transmitted.
All motions in FIG. 1 are defined with respect to Axis 1 111 (not
shown), which is the axis of rotation of a handle dial
(corresponding to H.Body B 102) with respect to a handle shell
(corresponding to H.Body A 101). Any motion direction not
explicitly mentioned could be a DoF or DoC.
[0082] In FIG. 1, H.Body C 103 is shown having a single
translational DoF 105' along Axis 1 111 (not shown) with respect to
H.Body A 101 and vice versa. H.Body C 103 also has a rotational
constraint (DoC) 105'' along Axis 1 111 with respect to H.Body A
101 and vice versa. This type of joint, between H.Bodies A and C,
can be accomplished through a variety of embodiments. In one
embodiment, the interfacing bodies have a keying feature between
them which restricts relative rotation about Axis 1 111 and
simultaneously allows for relative translation along Axis 1 111.
FIG. 3A schematically describes a joint which might occur between
H.Body A 101 and H.Body C 103. Referring to FIG. 3A, an outer body
with a square longitudinal slot may correspond to H.Body A 101, 301
while the inner square key may correspond to H.Body C 103, 303.
Considering that H.Body A 101, 301 is fixed to the reference
ground, H.Body C 103, 303 will be allowed to translate about Axis 1
111, 311 while unable to rotate about Axis 1 111, 311 due to the
interferences posed by square cross-sectional joint. One might
consider that this joint can also have a rectangular cross-section
which can provide the same single axis (Axis 1 111, 311) rotational
constraint and single axis (Axis 1 111, 311) translational DoF.
[0083] A functional aspect of this joint is a low friction relative
sliding motion along Axis 1 111, 311 between H.Body A 101, 301 and
H.Body C 103, 303. To achieve this, the surface contact between
both bodies (H.Body A 101, 301 and H.Body C 103, 303) may need to
be minimal so as to avoid large frictional contact between surfaces
of H.Body A 101, 301 and H.Body C 103, 303. Therefore, one way of
achieving the same joint between H.Body A 101, 301 and H.Body C
103, 303 with less friction contact is to minimize the contact
surface area between two bodies. FIG. 3B shows one way to reduce
the surface contact between H.Body A 101, 301 and H.Body C 103, 303
by interfacing the spokes of H.Body C 103, 303 with corresponding
slots cut in H.Body A 101, 301.
[0084] FIGS. 3A and 3B show examples of achieving the constraint
and DoF between H.Body A 101, 301 and H.Body C 103, 303 but, they
can have different geometric shapes provided that the constraints
and DoFs are met. For example, FIG. 3C shows one way this joint can
be achieved by essentially providing a keying surface 320 via the
flat end of the D-Shaft 303 (H.Body C 103, 303) that engages with a
corresponding slot present in H.Body A 101, 301.
[0085] H.Body B 102, 302 and H.Body D 104, 304 have a rotational
constraint about Axis 1 111, 311 and a single translational DoF
107' along Axis 1 111, 311. This is the same type of rotational
constraint (DoC) 105'' and translational DoF 105' that is present
between H.Body A 101, 301 and H.Body C 103, 303. Therefore, each
one of the ways to attain the joint between H.Body A 101, 301 and
H.Body C 103, 303 are also applicable to the joint between H.Body B
102, 302 and H.Body D 104, 304; given the constraint and DoF
requirements are fulfilled.
[0086] Any of the joints between H.Body A 101, 301 and H.Body C
103, 303 as well as between H.Body B 102, 302 and H.Body D 104, 304
may include or require a low friction surface contact between the
bodies. This, along with rotational constraint (DoC) 105'', 107''
about Axis 1 111, 311 and single translational DoF 105', 107' along
Axis 1 111, 311, may completely define the joint between these
bodies. Similarly, a constraint, a DoF and functional requirements
define the joint between H.Body A 101, 301 and H.Body B 102, 302 as
well as between H.Body C 103, 303 and H.Body D 104, 304. H.Body A
101, 301 and H.Body B 102, 302 may have a single rotational DoF
106' about Axis 1 111, 311 relative to each other and translational
constraint (DoC) 106'' along Axis 1 111, 311. H.Body A 101, 301 and
H.Body B 102, 302 may also have a functional requirement of
providing low friction joint between them while they rotate
relative to each other about Axis 1 111, 311. This functional
requirement comes from the fact that either of the duo, H.Body A
101, 301 and H.Body B 102, 302 or H.Body C 103, 303 and H.Body D
104, 304 can be under compressive or tensile loading while
fulfilling the rotational DoF 106', 108' about Axis 1 111, 311 and
translational constraint (DoC) 106'', 108'' along Axis 1 111,
311.
[0087] For example, if H.Body A 101, 301 and H.Body B 102, 302 are
placed such that their surfaces normal to Axis 1 111, 311 are under
compression, they need to overcome the normal forces acting on each
bodies' surfaces so as to provide the rotational DoF 106' about
Axis 1 111, 311. Therefore, to provide the rotational DoF 106'
about Axis 1 111, 311 and the translational constraint 106'' along
Axis 1 111, 311, the surfaces of H.Body A 101, 301 and H.Body B
102, 302 may need to provide low friction contact such that the
bodies can rotate relative to each other about Axis 1 111, 311.
FIG. 3D shows one way of obtaining the desired rotational DoF 106'
and translational constraint (DoC) 106'' by providing low friction
surface contact. In this example, a thrust bearing 330 is used to
provide the rotational DoF 106' along with maintaining low friction
contact between surfaces of H.Body A 101, 301 and H.Body B 102, 302
by holding the thrust load between the two bodies. Similarly, this
functionality can be achieved in many other ways that fulfill the
rotational DoF 106' and translational constraint 106'' requirement.
For example, either an angular contact ball bearing, or a roller
ball bearing, each capable of holding the required radial and
thrust loads can also be used between H.Body A 101, 301 and H.Body
B 102, 302. Alternatively, a bushing between two bodies can be used
to provide radial support as well as capacity to bear thrust load.
Other ways in which the thrust load can be supported is by having a
thrust bearing 333 between H.Body A 101, 301 and H.Body B 102, 302
along with washers 334, 335 on each side of the bearing 333, for
example, as is shown in FIG. 3E. A single washer 340 between H.Body
A 101, 301 and H.Body B 102, 302 made of material with low friction
coefficient like Teflon (PTFE), nylon, etc. can also serve the
purpose for bearing the thrust load and providing the rotational
DoF 106' about Axis 1 111, 311, for example, as is shown in FIG.
3F. In accordance with yet another alternative embodiment, FIG. 3G
shows a bushing 345 placed between the interfacing surfaces of
H.Body A 101, 301 and H.Body B 102, 302, such that it is capable to
holding thrust load and thereby providing a translational
constraint (DoC) 106'' along Axis 1 111, 311.
[0088] The same system of two bodies with an intermediate member
carrying thrust load and providing a rotational DoF 106' about Axis
1 111, 311 and providing a translational constraint (DoC) 106''
along Axis 1 111, 311, shown in FIGS. 3D, 3E, and 3F also works
well when there is a tensile load--as opposed to compressive
load--between H.Body A 101, 301 and H.Body B 102, 302, for example,
as illustrated in FIG. 3H with an embodiment similar to that
illustrated in FIG. 3D, wherein a thrust bearing 347 is located
between H.Body A 101, 301 and H.Body B 102, 302, facing normal to
Axis 1 111, 311. The thrust bearing 347 between H.Body A 101, 301
and H.Body B 102, 302 can be of various types, e.g., thrust needle
bearing, thrust roller bearing, roller bearing, tapered roller
bearing, angular contact bearing, etc., some of which are
illustrated in FIGS. 3I.1 through 3I.4. For example, FIG. 3H shows
a thrust roller bearing 347 acting as joint between H.Body A 101,
301 and H.Body B 102, 302. Also, H.Body C 103, 303 and H.Body D
104, 304 may have the same type of joint as H.Body A 101, 301 and
H.Body B 102, 302 and comply with all the aforementioned joint
types mentioned in this section.
[0089] As illustrated in FIGS. 3I.1 through 3I.4, and FIGS. 3J and
3K, other types of bearings may be used as alternatives to, or in
combination with, the above-described thrust bearings 330, 333,
347, for example, tapered roller bearings 349, radial ball bearings
394, etc.
[0090] Accordingly, H.Body A 101, 301 and H.Body B 102, 302 can be
under compressive or tensile load along Axis 1 111, 311. Similarly,
H.Body C 103, 303 and H.Body D 104, 304 can also be under
compressive or tensile load along Axis 1 111, 311. This gives two
possible combinations for the whole system presented with schematic
diagram in FIG. 1 (to be under tensile load or compressive load).
Either of the system of two bodies, H.Body A 101, 301 and H.Body B
102, 302, or H.Body C 103, 303 and H.Body D 104, 304 can be under
tensile or compressive load. As presented in FIG. 1, with H.Body A
101, 301 serving as the reference ground, H.Body B 102, 302 can be
under tension or under compression with respect to H.Body A 101,
301. However, H.Body C 103, 303 is free to move along Axis 1 111,
311 with respect to H.Body A 101, 301 and has rotational constraint
about Axis 1 111, 311 with respect to H.Body A 101, 301. H.Body C
103, 303 can be under compression or tension with respect to H.Body
D 104, 304, and H.Body D 104, 304 is free to translate along Axis 1
111, 311 with respect to H.Body B 102, 302 and has rotational
constraint about Axis 1 111, 311 with respect to H.Body B 102, 302.
FIG. 3L illustrates a configuration where H.Body B 102, 302 is
under compressive load with respect to H.Body A 101, 301 and H.Body
C 103, 303 is under tensile load with respect to H.Body D 104, 304.
In this example, an angular contact bearing 351 is used between
H.Body A 101, 301 and H.Body B 102, 302. This accounts for a joint
between H.Body A 101, 301 and H.Body B 102, 302 that provides the
associated translational constraint (DoC) 106'' and rotational DoF
106' requirements mentioned above, along with the functional
requirement of providing low friction between the surfaces in
contact with one another. Similarly, a thrust bearing 330, 333,
347, 349, 394, 351 may be used between H.Body C 103, 303 and H.Body
D 104, 304 may be used. This accounts for a joint between H.Body C
103, 303 and H.Body D 104, 304 that provides the associated
translational constraint (DoC) 108'' and rotational DoF 108'
requirements mentioned above, along with the functional requirement
of providing low friction surface contact.
[0091] It should be understood that even though the bodies have
been illustrated as being cylindrical in shape, the constraint map
(FIG. 1) doesn't imply any restriction on geometric shapes of these
bodies, provided that the functionality, DoFs and constraints are
satisfied.
[0092] FIGS. 4A and 4B show an example of an ergonomic handle
assembly 400 (unlimited-rotation handle assembly) that utilizes the
mechanism illustrated in FIG. 3L involving both compressive and
tensile loading conditions. This handle 401 is an embodiment of the
constraint map shown in FIG. 1. The rotation dial 402 (H.Body B
102, 402) is under translational constraint (DoC) 106'' about Axis
1 111, 411 with respect to Handle Body Shell 401 (H.Body A 101,
401). The rotation dial 402 transmits this rotation about Axis 1
111, 411 to H.Body D 104, 404, which is also referred as shuttle
404. This is possible because shuttle 404 (H.Body D 104, 404) is
under rotational constraint (DoC) 107'' about Axis 1 111, 411 with
respect to rotation dial 402 (H.Body B 102, 402) and therefore, has
no relative rotation about Axis 1 111, 411. The shuttle 404 (H.Body
D 104, 404) is further interfaced with H.Body C 103, 403 (referred
as push rod or pull rod, i.e. push/pull rod 403) via a joint 455
which allows rotational DoF 108' along Axis 1 111, 411 and
translational constraint (DoC) 108'' along Axis 1 111, 411. The
translation of shuttle 404 (H.Body D 104, 404) along Axis 1 111,
411 is further transmitted to the moving jaw of an end-effector via
an end-effector transmission 471. The latter may alternatively be
referred to (e.g., when the end-effector is configured as a jaw) as
a jaw closure transmission member 471 or jaw closure actuation
transmission member 471. In some variations, it may simply be
referred to as a transmission cable (when it is a compliant cable,
for example). This jaw closure actuation transmission member 471
can be either rigid or non-rigid body, or a combination of a rigid
and non-rigid members. For example, the transmission member can be
either the shaft of an apparatus (e.g., of a laparoscopic
instrument) or a rod passing internally through the shaft, a cable
under tension that connects to the end-effector at the distal end
of the laparoscopic instrument, or a combination of a non-rigid
body and a rigid body (e.g. a rod along with a cable under
tension). The push/pull rod 403 (H.Body C 103, 403) and shuttle 404
(H.Body D 104, 404) are under tensile load and the rotation dial
402 (H.Body B 102, 402) is under compressive load and the latter
does not translate along Axis 1 111, 411 with respect to handle
shell 401 (H.Body A 101, 401).
[0093] Another variation of an ergonomic handle assembly 400 shown
in FIGS. 4A and 4B can be constructed via a flexure-based design,
also known as a compliant mechanism, that realizes the constraint
map of FIG. 1 by employing compliant or flexure joints between the
bodies H.Body A 101, H.Body B 102, H.Body C 103, and H.Body D 104
to achieve the necessary constraints.
[0094] An apparatus incorporating the unlimited-roll handle
assemblies illustrated in FIGS. 4A and 4B is shown in FIGS. 5, 7,
and 8 as part of a medical device (specifically a laparoscopic
device). More particularly, FIGS. 5, 7, and 8 shows a laparoscopic
surgical instrument having an end-effector configured as a jaw
assembly; wherein in FIG. 5 the jaws are open and in FIG. 7 the
jaws are shown closed.
[0095] Referring to FIGS. 5 through 8, the exemplary apparatus 500
includes a tool frame 525, the latter of which includes a tool
shaft 526 and a forearm attachment portion 527 at the proximal end
528 of the tool frame 525. A wrist cuff 605--having a passage
therethrough--that is configured to hold a wrist 607 or forearm 608
of a user, may be coupled to the forearm attachment portion 520,
527. For example, in some embodiments, the wrist cuff 605 is
operatively coupled to the forearm attachment portion 520, 527 of
the tool frame 525 via a bearing therebetween that provides for the
wrist cuff 605 to slide or roll so that there is a roll rotational
degree of freedom between the tool frame 525 and the wrist cuff 605
about a tool axis 515 (Axis 3 515). A proximal unlimited-roll
handle assembly 400--for example, as shown in FIGS. 4A and 4B--may
be connected to the tool frame 525 by an input joint 529, the
latter of which may be configured to encode motion between the tool
frame 525 and the unlimited-roll handle assembly 400, as shown in
FIGS. 5, 7 and 8. In this example, the input joint 529 includes a
pair of transmission strips 533, 534 that are connected between the
unlimited-roll handle assembly 400 and the forearm attachment
portion 527 by corresponding associated hinged joints 530, and that
may be connected in parallel to respective pivoting joints (not
shown) in order to provide for separately encoding pitch and yaw
rotations of the unlimited-roll handle assembly 400 relative to the
tool frame 525. An output joint 583 (shown as an end-effector
articulation joint) between an end-effector 565 and the tool frame
525 (e.g., tool shaft) receives transmission input (e.g., cables,
not shown) from the output joint 583 to articulate the end-effector
565.
[0096] In this example, the unlimited-roll handle assembly 400
includes an ergonomic palm grip portion 101, 501 (handle shell 501)
that connects to the rotation dial 102, 502, which enclose an
internal push rod and shuttle (not visible), wherein these four
elements are constrained per the constraint map shown in FIG. 1.
The unlimited-roll handle assembly 400 also includes an
end-effector control input 549' that is actuated via a handle lever
549 and acts as a mechanical extension of the internal push rod. In
alternate configurations, the handle lever 549 is coupled to the
push rod via a transmission mechanism that may comprise a linkage,
cams, springs, etc. A transmission cable 566 connects to the
shuttle and acts as a jaw closure actuation transmission member
extending from the shuttle and through the tool shaft 526 to the
end-effector 565. This transmission cable 566 may be enclosed by a
protective and/or supporting sheath or cover or conduit, for some
or entire portion of its length. The end-effector 565 itself is a
jaw assembly including a first (ground) end-effector portion 569,
in this example, including a fixed jaw 569 to which a pivoting
second end-effector portion (moving jaw 568) is attached. The
transmission cable 566 may couple to the moving jaw 568 at the
end-effector closure output 577.
[0097] In FIG. 5, rotation of the dial portion 102, 502 of the
unlimited-roll handle assembly 400 when the user's forearm 608 is
mounted to the proximal end 528 of the tool frame 525 and the palm
grip portion 101, 501 is held in the user's hand 609 so that the
user can rotate the rotation dial 102, 502 between the thumb and
fingers, which in turn rotates the entire tool frame 525, and
therefore the end-effector 565 that is attached to the distal end
578 of the tool frame 525 via an end-effector output articulating
joint 583. Thus, the handle 101, 501 may rotate about a first axis
111, 511 referred to as handle articulated roll axis 511 (Axis 1),
so as to cause the tool shaft 526 to rotate about a third axis 515
referred to as the tool shaft roll axis 515 (Axis 3), which in turn
causes the end-effector 565 to roll about a second axis 513,
referred to as an end-effector articulated roll axis 513 (Axis
2).
[0098] The rotation dial 102, 502 (H.Body B) as shown in FIG. 5 is
rotated about Axis 1 111, 511. The rotation of H.Body B 102, 502
leads to a rotation of the tool frame 525 via the transmission
strips 533, 534 (as they constrain rotation DoF), which in turn
causes a rotation of the tool shaft 526 (about Axis 3 515)
operatively coupled to the tool frame 525, and a rotation of the
end-effector 565 (about Axis 2 513) operatively coupled to the tool
shaft 526. When the handle 101, 501 is articulated using the input
articulating joint 529, the end-effector 565 articulates via the
end-effector output articulating joint 583, wherein the
end-effector articulated roll axis 513 (Axis 2) is distinct from
the tool shaft roll axis 515 (Axis 3).
[0099] The above description is also relevant when describing
apparatuses that either do not attach to the forearm 608 or that
attach to the forearm 608 via a roll joint, so that rotation of the
dial portion 102, 502 of the unlimited-roll handle assembly 400
leads to roll rotation of a forearm attachment apparatus 600 about
the wrist 607 via the transmission strips 533, 534 (as they
constrain the roll rotation), leading to a rotation of tool frame
525, the tool shaft 526 and eventually, the end-effector 565. FIG.
6 illustrates an example of an embodiment of a forearm attachment
apparatus 600 comprising a 3-Axis gimbal assembly including a wrist
cuff 605 that securely attaches to the user's wrist 607/forearm
608, leaving the user's hand 609 free to move (e.g., to grasp the
handle 101, 501 and manipulate the rotation dial 102, 502 and
end-effector control input 549'). In this embodiment, the forearm
attachment apparatus 600 allows pitch, yaw and roll degrees of
freedom; the wrist cuff 605 pivotally attaches to a deviation ring
514 with a first pair of pins 610 that that provide for rotation
about flexion/extension axis of rotation 516. The deviation ring
514 is in turn pivotally attached to a sled 518 with a second pair
of pins 611 that provide for rotation about a deviation axis of
rotation 521, wherein the sled 518 is configured to roll within a
raised inner track 519 of an outer guide ring 520 about a
corresponding roll axis of rotation 531. Accordingly, the forearm
attachment apparatus 600 provides for pitch, yaw and roll degrees
of freedom between the wrist cuff 605 and the tool frame 525 when
coupled to the tool frame 525 of the apparatus 500. For example, in
one set of embodiments, the outer guide ring maybe formed as part
of the forearm attachment portion 527 of the apparatus 500, or it
may be attached thereto. The wrist cuff 605 may be releasably
coupled into the deviation ring 514 via a snap-fit coupling 540 or
other some other type of coupling.
[0100] FIG. 8 shows another view of the laparoscopic instrument of
FIGS. 5-7 with the end-effector 565 in an articulated position, and
holding a needle that may be used to suture tissues. The
end-effector fixed jaw (ground) 569 and the end-effector moving jaw
568 can be rotated about the end-effector articulated roll axis 513
(Axis 2) such that the tool shaft 526/tool frame 525 rotates about
the tool shaft roll axis 515 (Axis 3) while the handle is rotated
about the handle articulated roll axis 511 (Axis 1); all while
simultaneously holding the needle securely by moving the
end-effector moving jaw 568 towards the end-effector fixed jaw
(ground) 569 via a jaw closure actuation transmission member 471
connected to H.Body D 104, 404 within the unlimited-roll handle
assembly 400. The apparatus 500 shown in FIGS. 5-8 may fit a
constraint map such as the one shown in FIG. 20A.
[0101] Another variation of an apparatus incorporating the
unlimited-roll handle assemblies illustrated in FIGS. 4A and 4B
that conforms to the constraint map illustrated in FIG. 1 is shown
in FIG. 9. In this example, the rotation of a rotation dial 102,
902 (H.Body B) about Axis 1 111, 911 leads to rotation of an
associated end-effector assembly 965 (shown here as a jaw assembly
including a moving jaw 968 and a fixed jaw 969) about Axis 2 915.
Here, the tool frame 925 including the tool shaft 926 does not
rotate about their associated axis (Axis 3 915) thereof. The tool
frame 925 may still be connected to a wrist cuff 605 mounted on a
user's forearm 608 via a forearm attachment apparatus 600 that may
provide for a pitch and/or yaw rotational DoF, as described
hereinabove. The end-effector assembly 965 has a rotational DoF
with respect to the distal end 927 of the associated end-effector
articulation output joint 928 about Axis 2 915 (similar to that
between H.Body A 101, 901 and H.Body B 102, 902 about Axis 1 111,
911) and an end-effector rotation transmission member 950 connects
H.Body B 102, 902 directly to the end-effector assembly 965 via the
torsionally stiff end-effector rotation transmission member 950.
This may also be the jaw closure actuation transmission member 471
or may house and therefore route, a flexible jaw closure actuation
transmission member 471, for example, a hollow flexible shaft
(end-effector rotation transmission member 950) that is torsionally
stiff that can transmit rotation from one end to another, housing a
flexible (in bending) cable (jaw closure actuation transmission
member 471) therewithin.
[0102] Another example of an apparatus 1000 incorporating the
above-described unlimited-roll handle assembly 400 of FIGS. 4A and
4B is shown in FIG. 10. This apparatus 1000 is configured as a
straight stick device with a non-articulating end-effector 1065.
Other straight stick apparatuses--for example, as described in U.S.
Pat. No. 4,712,545, U.S. Pat. No. 5,626,608, and U.S. Pat. No.
5,735,874--may benefit from incorporation of the unlimited-roll
handle apparatuses, for example, the unlimited-roll handle assembly
400 illustrated in FIGS. 4A and 4B. FIG. 10 shows an example of a
surgical instrument comprising an unlimited-roll handle assembly
400 (including palm grip portion 101, 1001 and a dial portion 102,
1002), a tool shaft 1026 and the non-articulating end-effector
1065, wherein, for example, there is a rotation joint 1067 between
the moving jaw 1068 and fixed jaw 1069 of the non-articulating
end-effector 1065, the latter configured as a jaw assembly. The
non-articulating end-effector 1065 connects to the rotation dial
102, 1002 (H.Body D) via a jaw closure actuation transmission
member (not visible in FIG. 10). This apparatus 1000 provides the
functionality of closing and opening the non-articulating
end-effector 1065 by moving the moving jaw 1068 relative to the
fixed jaw 1069. The apparatus 1000 may also provide the rotation of
the non-articulating end-effector 1065 about the handle axis 1011
(Axis 1 111, 1011), wherein the shaft axis 1015 (Axis 3) remains
parallel to the handle axis 1011 (Axis 1 1011) under rotation of
the H.Body B 102, 1002, tool shaft 1026 and the non-articulating
end-effector 1065 attached hereto.
[0103] Referring to FIG. 11, in accordance with another set of
embodiments that incorporate the unlimited-roll handle assemblies
illustrated in FIGS. 4A and 4B, articulation at the input joint 529
is encoded via either a serial kinematic input articulation joint
or a parallel kinematic input articulation joint. For example, FIG.
11 shows an articulating laparoscopic device 1100. Such devices
include a handle 101, 1101, tool shaft 1126 and an articulating
end-effector 1165. Similar to the above-described non-articulating
laparoscopic device 1000, the articulating laparoscopic device 1100
also incorporates an end-effector rotation joint 1167 (open/close
functionality) operative between a moving jaw 1168 and a fixed jaw
1169, but in addition to this open/close end-effector rotation
joint 1167, also contains an output articulation joint 1143 for
end-effector articulation, and a corresponding associated input
articulation joint 1142. The input articulation joint 1142 may be
implemented as either a serial kinematic (S-K) input joint or
parallel kinematic (P-K) input joint. Some articulating instruments
that consist of serial kinematic (S-K) input joint (such as the one
shown in FIG. 11) can be found, for example, in U.S. Pat. No.
8,465,475; U.S. Pat. No. 5,713,505, U.S. Pat. No. 5,908,436, U.S.
application Ser. No. 11/787,607 and U.S. Pat. No. 8,029,531.
Examples of articulating instruments incorporating a parallel
kinematic (P-K input joint may be found, for example, in U.S.
Patent Application Publication No. 2013/0012958. In such devices,
although the end-effector may be a jaw assembly and may be shown in
an open jaw condition, an associated articulating instrument can
also perform rotation with the end-effector rotation joint in a
closed jaw condition or with the output articulation joint in an
articulated condition.
[0104] FIGS. 12 and 13 illustrate other apparatus variations the
incorporate the unlimited-roll handle assembly illustrated in FIG.
4 that following the constraint map illustrated in FIG. 1. These
handle variations may be used with any of the other apparatus
components described herein (including with other device
architectures and/or constraint maps). For example, in FIG. 12, the
rotation dial 102, 1202 is proximal to the palm grip portion 101,
1201. The apparatus may include a shaft 1226 and an end-effector
1265, and may include the same axes as described above (first Axis
111, 1211, second Axis 1213 and third Axis 1215). In the constraint
map of FIG. 1, joint characteristics (DoFs and DoCs) between H.Body
A 101, 1202 and H.Body C are the same as the ones between H.Body B
102, 1201 and H.Body D. Also, joint characteristics (DoFs and DoCs)
between H.Body A 101, 1202 and H.Body B 102, 1201 are the same as
the ones between H.Body C and H.Body D. Therefore, any of the four
bodies can be referred as ground reference. FIG. 13 shows a
differently-located reference ground, located in the handle
assembly. In FIG. 13, when mapped to the constraint map of FIG. 1,
H.Body B 102, 1302 is chosen as reference ground and interfaces
firmly with user's hand 609, whereas, H.Body A 101, 1301 is rotated
with respect to H.Body B 102, 1302. Here, H.Body C 103, 1303
rotates with respect to H.Body D 104, 1304 and H.Body C 103, 1303.
Another way of explaining this embodiment (shown in FIG. 13) is
that the handle's rear end of the above-described embodiments is
now placed at the proximal end and vice versa.
[0105] Any of the apparatuses described herein may include a
rotation lock/ratcheting mechanism, as illustrated in FIG. 13. The
handle assembly shown by the constraint map of FIG. 1 consists of a
joint between H.Body A 101, 1301 and H.Body B 102, 1302 which
provides rotational DoF about Axis 1 111. This rotation can be made
more tactile by application of ratcheting feature between H.Body A
101, 1301 and H.Body B 102, 1302. Ratcheting between H.Body A 101,
1301 and H.Body B can provide a sense of discrete rotation degrees
while rotating about Axis 1. FIG. 13 illustrates a similar
variation. In this example, a thrust bearing 1317 is located
between the palm grip 101, 1301 and the rotation dial 102, 1302, as
is a ratchet mechanism 1319. The shuttle 104, 1304 and push rod
103, 1303 otherwise operate per the constraint diagram of FIG.
1.
[0106] The unlimited-roll handle assemblies described herein may
also be used with an apparatus configured to provide a pecking
motion at an end-effector operatively coupled thereto. For example,
referring to FIG. 14, other embodiments of an unlimited-roll handle
assembly 400 of FIG. 4 (fitting the constraint map of FIG. 1) may
provide for the opening and closing of an end-effector jaw
triggered directly by radially pressing the rotation dial 102, 1402
(H.Body B). For example, the embodiment illustrated in FIG. 14
comprises a handle shell 101, 1401 (H.Body A), held in a hand 609
of the user, and may include a rotation dial 102, 1402 (H.Body B)
that can rotate relative to handle shell 101, 1401 (H.Body A) about
Axis 1 111, 1411. The rotation dial 104, 1404 (H.Body B), when
radially pressed, pushes a shuttle 104, 1404 (H.Body D) along Axis
1 111, 1411 in accordance with the translational DoF of the shuttle
104, 1404 (H.Body D) with respect to the rotation dial 104, 1404
(H.Body B) along Axis 1 111, 1411. This closes a combined shaft and
end-effector 1432 that is rigidly connected to the rotation dial
102, 1402 (H.Body B), as shown in FIG. 14. The flexible nature of
the body representing combined shaft and end-effector 1432 directs
the movement of shuttle 104, 1404 (H.Body D)--as a sleeve
1404'--over the combined shaft and end-effector 1432. This sleeve
1404'/shuttle 104, 1404 (H.Body D), controls the opening and
closing of the associated end-effector 1432', the latter of which
acts as a double action jaw that can have various applications in
open surgery, for example, in eye surgery or in minimal invasive
surgery. The push/pull rod (H.Body C, which can't be seen in FIG.
14) may be keyed to the interior of the handle shell 101, 1401
(H.Body A) and attached via a spring, so that after the push/pull
rod (H.Body C) is moved relative to handle shell 101, 1401 (H.Body
A), it retracts back to its original position with the help of the
spring. Accordingly, this provides for the motion of the push/pull
rod (H.Body C) and shuttle 104, 1404 (H.Body D) along Axis 1 111,
1411 when the shuttle 104, 1404 (H.Body D) is pushed along Axis 1
by radially pressing the rotation dial 104, 1404 (H.Body B), and
provides for retracting both the shuttle 104, 1404 (H.Body D) and
the push/pull rod (H.Body C) to their original position thereafter.
Accordingly, for this embodiment, the combined end-effector 1432
can be rotated about its normal axis (Axis 1 111, 1411), and the
associated end-effector 1432' can be used to grab or clamp external
bodies by pecking the shuttle 104, 1404 (H.Body D), which closes of
the end-effector 1432', and can then be used to release the
external body by releasing the shuttle 104, 1404 (H.Body D), which
opens the end-effector 1432'.
[0107] Referring to FIG. 15, in accordance with another embodiment,
an apparatus 1500 utilizing a pull-pull configuration for jaw
closure transmission incorporates an unlimited-roll handle assembly
400 such as was shown in FIG. 4A, including a shuttle 104, 404
(H.Body D) keyed to H.Body B 102, 402. An associated jaw closure
(open/close) actuation transmission member 1530 is first pulled to
close an end-effector moving jaw 1567 with respect to a
corresponding end-effector fixed jaw 1568, and is then subsequently
pulled to open the end-effector moving jaw 1567 with respect to the
end-effector fixed jaw 1568. The jaw closure (open/close)
actuationtransmission member 1530 is attached to H.Body D 104, 404,
where H.Body D can translate with respect to H.Body B 102, 402 as a
result of the translational DoF 107' along Axis 1 111, 411, but
which has a translational constraint (DoC) 108'' with respect to
H.Body C 103, 403. Once H.Body D 104, 404 moves along Axis 1 111,
411 to pull the jaw closure (open/close) actuation transmission
member 1530 to close the jaws 1567, 1568 (i.e. bringing the
end-effector moving jaw 1567 and end-effector fixed jaw 1568
together), a second jaw closure (open/close) actuation transmission
member 1532 is pulled to open the end-effector moving jaw 1567. To
open the jaws 1567, 1568 the second jaw closure actuation
transmission member 1532 may be pulled. In one embodiment, the
second jaw closure actuation transmission member 1532 can be pulled
using a pull spring 1513, grounded at a reference frame called
"Spring Reference Ground 1512". Depending on how the roll
transmission member is routed throughout the whole assembly,
"Spring Reference Ground 1512" can occur at different locations in
the assembly, as follows: (1) If roll transmission is by means of
an input articulating joint 529, a tool frame/tool shaft 1526, an
output articulating joint 583, then the "spring reference ground
1512" can occur at the H.Body B 102, 402, or the tool frame/tool
shaft 1526, or the end-effector fixed jaw 1568; (2) If roll
transmission is by means of an independent roll transmission member
routed across the input articulating joint 529, through tool
frame/tool shaft 1526, and the output articulating joint 583 (given
an extra roll DoF between output joint distal end and end-effector
base), then the "spring reference ground 1512" can occur at H.Body
B 102, 402 or at the end-effector fixed jaw 1568.
[0108] In some variations, the unlimited-roll handle assembly is
generally configured to include a forearm attachment apparatus 600.
The unlimited-roll handle apparatus 1600 may provide the ability
for simultaneously transmitting roll and closure action to H.Body D
104 with respect to H.Body A 101. Such a variation that includes a
forearm attachment apparatus 600 that provides for addition degrees
of freedom (DoF) was described above in FIGS. 5-8, and another
example is shown in FIG. 16. In this example, a (one)
joint--referred to as a forearm attachment apparatus 1611--exists
between a wrist attachment/wrist cuff 1609 and a tool frame 1625.
The forearm attachment apparatus 1611 (similar to 600 shown in FIG.
6) may be used to couple the wrist attachment/wrist cuff 1609 to
the tool frame 1625, allowing either zero, or one or more degrees
of freedom DoF between the user's forearm and the unlimited-roll
handle apparatus 1600, depending upon the nature of the forearm
attachment apparatus 1611. The forearm attachment apparatus 600 may
be used with either articulating devices or non-articulating
devices. For example, one embodiment can include a roll DoF by
providing a roll rotation joint 1611' between the wrist
attachment/wrist cuff 1609 and the tool frame 1625. This joint may
use a "sled 518"--for example, as illustrated in FIG. 6--which can
provide for a roll rotational DoF about the roll axis 111, 531 or
the arm axis 612. Another embodiment can provide for a pitch DoF by
providing a rotation joint to allow rotation about the
flexion/extension axis of rotation 516. Another embodiment can
provide for a yaw DoF by providing a rotation joint to allow
rotation about the deviation axis of rotation 521. Another
embodiment can provide for both pitch and yaw DoF by providing one
or more rotation joints that allow rotation about the
flexion/extension axis of rotation 516 and rotation about the
deviation axis of rotation 521, respectively, for example, by
incorporating an intermediate body referred to as a deviation ring
514, for example, as illustrated in FIG. 6. Another embodiment can
provide for roll (about the arm axis 612), pitch (about the
flexion/extension axis of rotation 516) and yaw (about the
deviation axis of rotation 521) degrees of freedom (DoFs). Also as
shown in FIG. 16, a joint also exists between the tool frame 1625
and the tool shaft 1626, called a shaft-frame joint 1615, which may
have a zero DoF (i.e. a rigid connection between the tool shaft
1626 and the tool frame 1625), which, for the embodiments disclosed
herein, is the default configuration. The device 1601 illustrated
in FIG. 16 includes a handle palm grip 101, 1601 (H.Body A), a
rotation dial 102, 1602 (H.Body B), an end-effector input 1612
(e.g. a handle lever 549), a shaft-frame joint 1615, an
end-effector 1665 at a distal end 1627 of the tool shaft 1626, for
which are defined an associated handle axis 1611 (Axis 1 1611), an
associated tool shaft axis 1615 (Axis 3 1615) and an associated
end-effector axis 1613 (Axis 2 1613).
[0109] Some variations of a non-articulating instrument 1600 that
is forearm mounted and that incorporates the unlimited-roll handle
assembly 400 of FIGS. 4A and 4B may include a separate tool frame
1625 and a separate tool shaft 1626. In one such configuration, the
tool frame 1625 and wrist attachment/wrist cuff 1609 may be rigidly
attached (i.e. 0 DoF). In this case, if the tool shaft 1626 is
rigidly connected to the rotation dial 102, 1602 (H.Body B), then
the device 1601 may be configured so that there is at least one
roll rotation DoF between the tool shaft 1626 and the tool frame
1625. Furthermore, a shaft-frame joint 1615 can have a roll DoF, a
Pitch DoF, and/or a Yaw DoF.
[0110] Any of the apparatuses incorporating an unlimited-roll
handle apparatus described herein may also include a virtual center
(VC) 1721 at the associated input articulation joint, for example,
as shown in FIG. 17. This device 1700 can have either a serial or
parallel kinematic input joint, with the associated joint axes
intersecting at the virtual center (VC) 1721. This device 1700 is
similar to that shown in FIGS. 5,7, and 8, but explicitly shows the
virtual center (VC) 1721. The device 1700 also includes an
end-effector assembly 1765 that is also configured as a jaw
assembly.
Example: Medical Device
[0111] FIGS. 18A-18D illustrate one example of a medical device
1800 configured as a laparoscopic apparatus 1800' including an
unlimited-roll handle assembly 400 (similar to that illustrated in
FIGS. 4A and 4B), an elongate tool frame 525, a forearm attachment
apparatus 600 (similar to that illustrated in FIG. 6) having
multiple degrees of freedom between the user's arm and the tool
frame 525, an end-effector assembly 1765 configured as a jaw
assembly and an input joint 1801 that encodes pitch and yaw
rotation of the unlimited-roll handle assembly 400 for transmission
to an output joint 583', e.g. an end-effector output articulating
joint 583, so that the end-effector assembly 1765 may articulate in
the same direction as does the unlimited-roll handle assembly 400,
for example, as illustrated in FIGS. 19A-19C. A schematic
constraint diagram for the medical device 1800 shown in FIGS.
18A-18D is shown in FIG. 20A. An alternative constraint diagram for
an medical device 1800 as described herein is shown in FIG.
20B.
[0112] Referring again to FIGS. 18A-18D, the overall medical device
1800 comprises a pulley block 1805, a tool frame 525 including a
tool shaft 526 (the tool shaft 526 may be considered a portion of
the tool frame 525), all rigidly inter-connected to one another.
The pulley block 1805 serves as the outer ring 1805 of a forearm
attachment joint 1807 that interfaces with the distal forearm 608'
of a user via a wrist cuff 1803, as described above.
[0113] In this example, the wrist cuff 1803 and the outer ring 1805
are all part of the forearm attachment joint 1807 (corresponding to
the forearm attachment apparatus 600 of FIG. 6). The forearm
attachment joint 1807 comprises the outer ring 1805, a sled 518, a
deviation ring 514, and the wrist cuff 1803 (all connected in
series), as illustrated in FIG. 6 and described hereinabove, and
provide three rotational degrees of freedom (DoF) between the wrist
cuff 1803 and the outer ring 1805, i.e. roll, pitch, and yaw. Roll
is the rotation direction about the axis of the outer ring 1805,
which is the same as the axis of the tool shaft 526. Pitch and yaw
are orthogonal rotations with respect to the roll rotation about
the pitch axis 1833 and yaw axis 1831, respectively, as illustrated
in FIG. 18C. When the medical device 1800 is mounted on the forearm
608 (i.e., the wrist cuff 1803 is attached to the forearm 608/wrist
607 of a user), the forearm attachment joint 1807 provides the
above three rotational degrees of freedom DoF between the tool
frame 525 and user's/surgeon's forearm 608.
[0114] The tool frame 525 extends from the outer ring 1805/pulley
block 1805, and is shaped around the unlimited-roll handle assembly
400 so as to accommodate a user's hand 609 (over its entire range
of articulation) while supporting the unlimited-roll handle
assembly 400. The tool frame 525 rigidly connects to the tool shaft
526, which further extends in a distal direction (i.e., away from
the forearm attachment joint 1807 and the user). A two-DoF
articulating joint (also referred to as the output joint
583'/end-effector articulating joint 583) is located at the end
(also referred to as the output of the medical device 1800) of the
tool shaft 526. These two degrees of freedom DoF are pitch rotation
and yaw rotation, which are controlled/actuated by articulating the
input joint 1801 (discussed below) between the unlimited-roll
handle assembly 400 and the pulley block 1805. Additionally, the
end-effector assembly 1765 is equipped with a pair of jaws 1756
that can be opened and closed in response to a handle lever 549 of
the unlimited-roll handle assembly 400.
[0115] The input joint 1801 is located between the unlimited-roll
handle assembly 400 and the pulley block 1805 at the proximal end
528 of the medical device 1800, and provides for two rotational
degrees of freedom (DoF) (pitch rotation and yaw rotation)
therebetween. The input joint 1801 is a parallel kinematic
mechanism comprising two flexure transmission strips 533, 534 and
two transmission pulleys 1813.1, 1813.2 (a pitch pulley 1813.1 and
a yaw pulley 1813.2). The axes of the pulleys 1813.1, 1813.2, when
extrapolated, intersect at a virtual center (VC) 1821 in space. For
this reason, the parallel kinematic input joint 1801' of the
medical device 1800 is also referred to as a Virtual Center
mechanism 1801' or a Virtual Center input joint 1801'. When the
medical device 1800 is mounted on a user's forearm 608 via the
forearm attachment joint 1807 and the user's hand 609 holds the
handle 101, 501 of the unlimited-roll handle assembly 400, the
overall geometry of the medical device 1800 is such that the
virtual center (VC) 1821 produced by the parallel kinematic input
joint 1801' coincides with the center of rotation the user's wrist
joint 607. This ensures a natural, comfortable, unrestricted
articulation of the surgeon's wrist 607 while using the medical
device 1800.
[0116] Given the above configuration of the medical device 1800,
the yaw and pitch rotations of the user's wrist 607 with respect to
his/her forearm 608 are translated to the corresponding rotations
of the unlimited-roll handle assembly 400 with respect to the
pulley block 1805/tool frame 525. The parallel kinematic design of
the virtual center/mechanism 1801' is such that the two rotation
components (pitch and yaw) of the handle 101, 501 with respect to
the pulley block 1805 are mechanically separated/filtered into a
pitch-only rotation at the pitch pulley 1813.1 and a yaw-only
rotation at the yaw pulley 1813.2. The pitch pulley 1813.1 and yaw
pulley 1813.2 are respectively pivoted (and mounted) with respect
to the pulley block 1805 about the corresponding associated pitch
rotation axis 1833 and yaw rotation axis 1831, respectively. The
pitch and yaw rotations of the unlimited-roll handle assembly 400
(and therefore, of the surgeon's wrist 607) thus captured at the
pitch 1813.1 and yaw 1813.2 transmission pulleys are then
transmitted as corresponding rotations of the end-effector
articulating joint 583 via cables that originate at the
transmission pulleys 1813.1, 1813.2 and run through the pulley
block 1805, tool frame 525, and tool shaft 526 all the way to the
end-effector assembly 1765.
[0117] In addition to the yaw and pitch rotational degrees of
freedom (DoFs) provided by the input joint 1801, the input joint
also provides/allows for an axial translational degree of freedom
(DoF) along the roll axis 111, 1835, which provides/allows for a
range of user hand 609 sizes to be accommodated by the medical
device 1800, and ensures free and unrestricted hand 609/wrist 607
articulation.
[0118] Furthermore, the flexure transmission strips 533, 534 are
stiff in twisting about the roll axis 111, 1835, which ensures that
the input joint 1801 constrains (and therefore transmits) roll
rotation from the distal end of the unlimited-roll handle assembly
400 (i.e., the dial) via the flexure transmission strips 533, 534
to the pulley block 1805. Note that pulley block 1805 serves as the
outer ring 1805 of the forearm attachment joint 1807, which
provides a well-defined low-resistance rotation about roll axis
111, 1835 with respect to the wrist cuff 1803. This implies that
when the user holds the handle 101, 501 in his/her palm, he/she can
articulate the handle 101, 501 in any desired yaw and pitch
directions, resulting in corresponding articulation of the
end-effector assembly 1765. Then he/she can twirl the dial portion
102, 502 of the unlimited-roll handle assembly 400--i.e. the
rotation dial 102, 502--with his/her thumb and fingers (typically
index finger) while keeping the articulation of the unlimited-roll
handle assembly 400 fixed. The twirling of the rotation dial 102,
502 (i.e., roll rotation) is transmitted to the pulley block
1805/outer ring 1805 via the parallel kinematic input joint 1801'
(i.e. via the flexure transmission strips 533, 534 of the Virtual
Center mechanism 1801'). The pulley block 1805 then rotates about
the roll axis 111, 1835 with respect to the wrist cuff 1803, which
is attached to the forearm 608 of the user. As a result the entire
tool frame 525 rotates about the roll axis 111, 1835 with respect
to the forearm 608 of the user. Since the tool shaft 526 is rigidly
connected to the tool frame 525, the tool shaft 526 also rotates
about the roll axis 111, 1835. The roll rotation of the tool shaft
526 is transmitted to the end-effector assembly 1765 as well via
the output joint 583' (i.e. via the end-effector articulating joint
583). Because the articulation of the end-effector assembly 1765
(at the output joint 583') is controlled by the corresponding
articulation of the handle 101, 501 (at the input joint 1801), if
the latter is held fixed, the former is also held fixed, while roll
rotation is transmitted all the way from the twirling motion of the
surgeon's fingers to the end-effector assembly 1765. This
particular mode of operating the medical device 1800 is referred to
as articulated roll.
[0119] In addition to producing end-effector roll via twirling of
the surgeon's thumb and fingers (resulting in rotation of the
rotation dial 102, 502 with respect to the handle 101, 501),
another way to produce this roll is when the surgeon rotates (about
the roll axis 111, 1835) the entire unlimited-roll handle assembly
400 by pronating and supinating his/her hand 609 and forearm 608.
This roll motion is also transmitted to the tool frame 525 via the
flexure transmissions strips 533, 534 of the Virtual Center
mechanism 1801' and the pulley block 1805, and subsequently
transmitted to the end-effector assembly 1765 via the tool shaft
526. However, the amount of roll motion achieved in this manner is
limited by the range of pronation/supination allowed by the user's
(i.e. surgeon's) hand 609/forearm 608.
[0120] On the other hand, by having two distinct components in the
unlimited-roll handle assembly 400--the handle 101, 501 and the
rotation dial 102, 502--this limitation is overcome. The handle
101, 501, which remains fixed in the user's hand 609, is indeed
limited in its roll angle by the pronation/supination limit of the
user's hand 609/forearm 608. However, the user can--via his/her
fingers--endlessly, or infinitely, roll-rotate the rotation dial
102, 502 with respect to the handle 101, 501. This infinite-roll
rotation is then transmitted to the end-effector assembly 1765, as
described above. This infinite-roll capability provides significant
and unique functionality to the surgeon in complex surgical
procedure, such as when sewing, knot-tying, etc.
[0121] As noted already, the unlimited-roll handle assembly 400
comprises a rotation dial 102, 502 and a handle 101, 501, which are
connected by a rotation joint therebetween which has a single
rotational DoF about the roll axis 111, 1835. Additionally, the
unlimited-roll handle assembly 400 also houses an end-effector
actuation mechanism that is actuated by the handle lever 549,
wherein as the handle lever 549 is depressed (by the user's
fingers, typically middle, ring, and pinky fingers) with respect to
the handle 101, 501, the end-effector actuation mechanism
translates this action into a pulling action of a transmission
cable 566 of an end-effector transmission 471. This pulling action
is transmitted via the rotating interface/joint between the handle
101, 501 and the rotation dial 102, 502 to the end-effector
assembly 1765 via the transmission cable 566 within a flexible
conduit between the rotation dial 102, 502 and tool frame 525, then
through the tool shaft 526, and finally to the end-effector jaws
1756 of the end-effector assembly 1765 via the end-effector
articulating joint 583. A jaw closure mechanism in the end-effector
assembly 1765 closes the end-effector jaws 1756 responsive to the
pulling action of the transmission cable 566, as would be needed to
operate shears, graspers, a needle-holder, etc.
[0122] The virtual center (VC) 1721 provided by the input joint
1801 coincides with the center of rotation of the wrist joint 607
of the user operating the medical device 1800. Furthermore, the
three rotational axes of the corresponding three rotational degrees
of freedom (DoFs) (yaw axis 1831, pitch axis 1833, and roll axis
1835) provided by the forearm attachment joint 1807 may all
intersect at one point, referred to as the center of rotation of
the forearm attachment joint 1807. This center of rotation of the
forearm attachment joint 1807 may coincide with the center of
rotation of the input joint 1801 (i.e. the virtual center (VC) of
rotation 1721 of the unlimited-roll handle assembly 400 with
respect to the pulley block 1805).
[0123] Accordingly, the center of rotation of the forearm
attachment joint 1807 may also coincide with the center of rotation
of the user's wrist joint 607 when the medical device 1800 is
mounted on a user's forearm 608.
[0124] In particular, when the user's wrist 607 in not articulated
(i.e., is in a nominal position) the forearm axis should coincide
with the axis of the outer ring 1805, which should coincide with
the axis of the tool shaft 526, which should coincide with the axis
of the end-effector assembly 1765. This is when the handle 101, 501
is not articulated with respect to the pulley block 1805 (i.e. is
nominal) and therefore the end-effector assembly 1765 is not
articulated with respect to the tool shaft 526.
[0125] To facilitate the ease of performing an infinity roll of the
medical device 1800, the overall weight of the medical device 1800
may be distributed such that its center of gravity lies close to
the roll axis 111, 1835 of the medical device 1800, which ensures
that as the user rolls the medical device 1800 (as described above)
he/she is not working with or against gravity. With the weight of
the medical device 1800 supported at the user's forearm 608 and a
trocar on the patient's body, locating the center of gravity of the
medical device 1800 on the roll axis 111, 1835 makes driving the
roll rotation relatively effortless because gravity no longer has
an effect on the roll rotation.
[0126] In addition to all the functionality mentioned above, the
overall design and construction of the medical device 1800 also
helps filter out hand tremors and prevent them from reaching the
end-effector assembly 1765. In the medical device 1800, the handle
101, 501--and therefore surgeon's hand 609--are isolated from the
pulley block 1805/tool frame 525/tool shaft 526 by means of the
flexure transmission strips 533, 534, that because of their
material and/or construction, prevent any hand tremors from
reaching the tool shaft 526 and end-effector assembly 1765. The
tool frame 525 is mounted on the forearm 608 via the forearm
attachment joint 1807. Therefore the tool shaft 526, which is
connected to the tool frame 525, is controlled by the forearm 608
of the surgeon. Not only does this help drive power motions
(translating the tip of the shaft in three directions), but the
forearm 608 has many fewer tremors compared to the hand 609, so
that the shaft will experience fewer tremors as well.
[0127] Thus the flexure transmission strips 533, 534 may help
separate out the yaw and pitch rotation components of the rotation
of the handle 101, 501 with respect to the pulley block 1805
(equivalently, the yaw and pitch rotations of the hand 609 with
respect to the forearm 608), and separately transmit these
components of rotation to the corresponding pitch 1813.1 and yaw
1813.2 transmission pulleys, the latter of which are mounted on the
pulley block 1805. The flexure transmission strips 533, 534 also
help transmit the roll rotation from the unlimited-roll handle
assembly 400 to the pulley block 1805, tool frame 525, tool shaft
526, all the way to the end-effector assembly 1765, and also help
filter out or block hand tremors from reaching the pulley block
1805, and therefore from reaching the tool frame 525, and therefore
from reaching the tool shaft 526, and finally, therefore from
reaching the end-effector assembly 1765.
[0128] The use of an unlimited-roll handle assembly 400 enables
surgeons to have better control of the surgical instrument during
surgery as a result of being able to transfer natural, ergonomic,
and intuitive motion from the surgeon's hand 609/wrist 607/forearm
608 to the end-effector assembly 1765. The Virtual Center mechanism
1801' allows the pitch and yaw rotations of the surgeon's wrist 607
to be mapped and transferred intuitively and fluidly to
corresponding rotations of the end-effector articulating joint 583.
Without benefit of the unlimited-roll handle assembly 400 to
perform a roll of the end-effector assembly 1765, the surgeon would
otherwise be limited to pronation and supination of his/her forearm
608, which is inherently biomechanically limited. To perform an
articulated roll in which the axis of the roll remains offset from
the axis of the forearm 608, pronation and supination are combined
with flexion and extension of the wrist 607. Due to the limitations
in the human body, this rotation in limited in both total roll
angle as well as the offset angle from the surgeon's wrist axis.
Pronation, supination, flexion, and extension of the wrist 607 all
have various maximum articulation angles. Therefore, in order to
perform an articulated roll where the axis of the roll remains
constant, the angle of the roll will be limited to the by the
maximum angle that the hand 609 can make with the wrist 607 in the
worst possible orientation.
[0129] However, with the addition of the unlimited-roll handle
assembly 400, the surgical instruments described herein are able to
intuitively, fluidly, and ergonomically provide for the
end-effector assembly 1765 to directly inherit or achieve the yaw,
pitch, and roll of the input of the medical device 1800. In
addition to pronation and supination of the surgeon's wrist 607,
roll is also transferred to the end-effector assembly 1765 with the
rolling of the rotation dial 102, 502. When the handle 101, 501 is
in an articulated position where the axis of the end-effector
assembly 1765 is no longer concentric with the axis of the forearm
608, the surgeon is able to ergonomically perform an articulated
roll by keeping the wrist 607 fixed and rolling the rotation dial
102, 502 with his/her thumb/fingers. This enables an articulated
roll in every orientation of the wrist 607 with the roll angle
being only limited to that specific orientation of the wrist 607.
The roll of the end-effector assembly 1765 is no longer limited in
rotation by the surgeon's limitation in pronation, supination,
flexion, and extension. By controlling the roll of the instrument
through the rotation dial 102, 502 by their thumb/fingers, the
surgeon is able to perform an infinite amount of roll while still
being able to use the actuate the handle lever 549 of the
end-effector actuation mechanism to control the open/close
actuation of the end-effector assembly 1765 in any articulation or
roll orientation.
[0130] Furthermore, the unlimited-roll handle assemblies described
herein enable simultaneous and predictable control of all the
minimal access tool's advanced features with an ergonomic
interface. This handle features power motions, finesse motions and
intuitive control of articulation. These three actions are
individually aligned to optimal regions of the user's hand 609.
Power motions such as gripping the handle and lever to close the
jaw are confined to the palm and rear fingers. Finesse motions such
as rotating the rotation dial 102, 502 are aligned to the thumb and
first fingers (e.g., index finger). The separation of power and
finesse actions to these regions of the hand 609 minimizes user
fatigue. This also reduces the cognitive load for the user,
reducing their mental fatigue. Similar to using a computer
joystick, articulation is controlled by gently directing the handle
to the desired angle.
[0131] Yet further, the unlimited-roll handle apparatuses described
herein enable the simultaneous actions of open/close, roll rotation
and articulation (or any combination). Like one's own hand 609,
motions are fluid and natural. Performing a "running stitch" by
rotating the rotation dial 102, 502 in continuous direction without
unwinding, unlocking or other intermediate step is a novelty
compared with other suturing instruments. This is made possible by
balancing the instrument and simplifying the mechanics of
instrument rotation. When the rotation dial 102, 502 on the
unlimited-roll handle assembly 400 is rotated, the entire
instrument rotates or orbits in the same direction around the
user's wrist 607. During this process, the virtual center also
rotates but remains focused at the center of the user's wrist 607.
Consequently, performance is consistent and predictable, even
during complex moves like an articulated axial rotation.
[0132] As perceived by the user, the unlimited-roll-handle-based
apparatuses described herein enable a finesse roll of the
associated unlimited-roll handle assembly while engaging the
end-effector closure mechanism. Initially, the rotation mechanism
within the unlimited-roll handle assembly as previously described
comprises optimized bearings between the various bodies within the
mechanism. It is by way of the bearings between various bodies of
the rotation mechanism that the surgeon does not notice any
difference in the resistance to rotate when the jaw closure lever
is engaged or disengaged. Infinite rotation of the unlimited-roll
handle assembly is enabled by a swivel joint and several keying
features within the rotation mechanism which prevent the jaw
closure cable from twisting upon itself during rotation.
[0133] During use, these unlimited-roll handle-based assemblies may
allow the surgeon to perform an articulation of the end-effector
assembly 1765 of the overall surgical device 1800' by articulating
their own wrist 607 while comfortably holding the base of the
handle 101, 501 and handle lever 549. Articulation of the
unlimited-roll handle apparatus leverages the handle 101, 501, at
the distal end of the rotation dial 102, 502, to rotate the flexure
transmission strips 533, 534 along with their associated
transmission pulleys 1813.1, 1813.2, the latter of which are
centered about the surgeon's wrist 607 in accordance with what is
also referred to as the Virtual Center mechanism 1801'. Rotation of
the two transmission pulleys 1813.1, 1813.2 drives associated
articulation cables within the frame to provide for controlling the
corresponding articulation of the end-effector assembly 1765. Once
an articulated position is established, the surgeon may choose to
close the jaw by actuating the handle lever 549 on the handle 101,
501. The process of suturing with a needle requires that the
surgeon roll-rotate the end-effector assembly 1765 about its
articulated axis. thereby driving the needle about its curvature
axis through various tissue planes. These unlimited-roll
handle-based assemblies may (in conjunction with the other features
described herein) provide the surgeon with easy access to the
rotation dial 102, 502 that provides for rotating both the
associated flexure transmission strips 533, 534 and the associated
transmission pulleys 1813.1, 1813.2 about the surgeon's wrist 607,
as enabled by an associated three-axis wrist gimbal (i.e. the
forearm attachment joint 1807). The three-axis wrist gimbal
constrains and centers the medical device 1800 about the surgeon's
wrist 607 so that rotation of the rotation dial 102, 502 and
Virtual Center mechanism 1801' drives a predictable concentric
rotation of the pulley block 1805, tool frame 525, tool shaft 526
and end-effector assembly 1765 about the surgeon's wrist 607.
[0134] These devices provide for finesse rotation control with
relatively low resistances to rotation both within the
unlimited-roll handle assembly (addressed via bearings) and at the
wrist gimbal (addressed via minimized contact surfaces and low
friction plastic materials), with overall balance of the device
(addressed by establishing a center of gravity on the axis of
rotation and redistribution of weight throughout the device), and
with the use of flexure transmission strips 533, 534 which offer
little compliance in torsion/twisting about roll axis 111,
1835.
[0135] When a feature or element is herein referred to as being
"on" another feature or element, it can be directly on the other
feature or element or intervening features and/or elements may also
be present. In contrast, when a feature or element is referred to
as being "directly on" another feature or element, there are no
intervening features or elements present. It will also be
understood that, when a feature or element is referred to as being
"connected", "attached" or "coupled" to another feature or element,
it can be directly connected, attached or coupled to the other
feature or element or intervening features or elements may be
present. In contrast, when a feature or element is referred to as
being "directly connected", "directly attached" or "directly
coupled" to another feature or element, there are no intervening
features or elements present. Although described or shown with
respect to one embodiment, the features and elements so described
or shown can apply to other embodiments. It will also be
appreciated by those of skill in the art that references to a
structure or feature that is disposed "adjacent" another feature
may have portions that overlap or underlie the adjacent
feature.
[0136] Terminology used herein is for the purpose of describing
particular embodiments only and is not intended to be limiting of
the invention. For example, as used herein, the singular forms "a",
"an" and "the" are intended to include the plural forms as well,
unless the context clearly indicates otherwise. It will be further
understood that the terms "comprises" and/or "comprising," when
used in this specification, specify the presence of stated
features, steps, operations, elements, and/or components, but do
not preclude the presence or addition of one or more other
features, steps, operations, elements, components, and/or groups
thereof. As used herein, the term "and/or" includes any and all
combinations of one or more of the associated listed items and may
be abbreviated as "/".
[0137] Spatially relative terms, such as "under", "below", "lower",
"over", "upper" and the like, may be used herein for ease of
description to describe one element or feature's relationship to
another element(s) or feature(s) as illustrated in the figures. It
will be understood that the spatially relative terms are intended
to encompass different orientations of the device in use or
operation in addition to the orientation depicted in the figures.
For example, if a device in the figures is inverted, elements
described as "under" or "beneath" other elements or features would
then be oriented "over" the other elements or features. Thus, the
exemplary term "under" can encompass both an orientation of over
and under. The device may be otherwise oriented (rotated 90 degrees
or at other orientations) and the spatially relative descriptors
used herein interpreted accordingly. Similarly, the terms
"upwardly", "downwardly", "vertical", "horizontal" and the like are
used herein for the purpose of explanation only unless specifically
indicated otherwise.
[0138] Although the terms "first" and "second" may be used herein
to describe various features/elements (including steps), these
features/elements should not be limited by these terms, unless the
context indicates otherwise. These terms may be used to distinguish
one feature/element from another feature/element. Thus, a first
feature/element discussed below could be termed a second
feature/element, and similarly, a second feature/element discussed
below could be termed a first feature/element without departing
from the teachings of the present invention.
[0139] Throughout this specification and the claims which follow,
unless the context requires otherwise, the word "comprise", and
variations such as "comprises" and "comprising" means various
components can be co-jointly employed in the methods and articles
(e.g., compositions and apparatuses including device and methods).
For example, the term "comprising" will be understood to imply the
inclusion of any stated elements or steps but not the exclusion of
any other elements or steps.
[0140] In general, any of the apparatuses and methods described
herein should be understood to be inclusive, but all or a sub-set
of the components and/or steps may alternatively be exclusive, and
may be expressed as "consisting of" or alternatively "consisting
essentially of" the various components, steps, sub-components or
sub-steps.
[0141] As used herein in the specification and claims, including as
used in the examples and unless otherwise expressly specified, all
numbers may be read as if prefaced by the word "about" or
"approximately," even if the term does not expressly appear. The
phrase "about" or "approximately" may be used when describing
magnitude and/or position to indicate that the value and/or
position described is within a reasonable expected range of values
and/or positions. For example, a numeric value may have a value
that is +/-0.1% of the stated value (or range of values), +/-1% of
the stated value (or range of values), +/-2% of the stated value
(or range of values), +/-5% of the stated value (or range of
values), +/-10% of the stated value (or range of values), etc. Any
numerical values given herein should also be understood to include
about or approximately that value, unless the context indicates
otherwise. For example, if the value "10" is disclosed, then "about
10" is also disclosed. Any numerical range recited herein is
intended to include all sub-ranges subsumed therein. It is also
understood that when a value is disclosed that "less than or equal
to" the value, "greater than or equal to the value" and possible
ranges between values are also disclosed, as appropriately
understood by the skilled artisan. For example, if the value "X" is
disclosed the "less than or equal to X" as well as "greater than or
equal to X" (e.g., where X is a numerical value) is also disclosed.
It is also understood that the throughout the application, data is
provided in a number of different formats, and that this data,
represents endpoints and starting points, and ranges for any
combination of the data points. For example, if a particular data
point "10" and a particular data point "15" are disclosed, it is
understood that greater than, greater than or equal to, less than,
less than or equal to, and equal to 10 and 15 are considered
disclosed as well as between 10 and 15. It is also understood that
each unit between two particular units are also disclosed. For
example, if 10 and 15 are disclosed, then 11, 12, 13, and 14 are
also disclosed.
[0142] Although various illustrative embodiments are described
above, any of a number of changes may be made to various
embodiments without departing from the scope of the invention as
described by the claims. For example, the order in which various
described method steps are performed may often be changed in
alternative embodiments, and in other alternative embodiments one
or more method steps may be skipped altogether. Optional features
of various device and system embodiments may be included in some
embodiments and not in others. Therefore, the foregoing description
is provided primarily for exemplary purposes and should not be
interpreted to limit the scope of the invention as it is set forth
in the claims.
[0143] The examples and illustrations included herein show, by way
of illustration and not of limitation, specific embodiments in
which the subject matter may be practiced. As mentioned, other
embodiments may be utilized and derived there from, such that
structural and logical substitutions and changes may be made
without departing from the scope of this disclosure. Such
embodiments of the inventive subject matter may be referred to
herein individually or collectively by the term "invention" merely
for convenience and without intending to voluntarily limit the
scope of this application to any single invention or inventive
concept, if more than one is, in fact, disclosed. Thus, although
specific embodiments have been illustrated and described herein,
any arrangement calculated to achieve the same purpose may be
substituted for the specific embodiments shown. This disclosure is
intended to cover any and all adaptations or variations of various
embodiments. Combinations of the above embodiments, and other
embodiments not specifically described herein, will be apparent to
those of skill in the art upon reviewing the above description.
* * * * *