U.S. patent number 3,635,461 [Application Number 04/876,690] was granted by the patent office on 1972-01-18 for surgical table and control.
This patent grant is currently assigned to American Sterilizer Company. Invention is credited to Edward A. Bellucci, Carl J. Winschel.
United States Patent |
3,635,461 |
Bellucci , et al. |
January 18, 1972 |
SURGICAL TABLE AND CONTROL
Abstract
A control for an apparatus, for example, an operating table,
having a plurality of parts for moving the parts of the table
individually and selectively to any of a plurality of selected
positions. The control is carried out by a rotated shaft having
spaced cams on it spaced from each other for moving the individual
parts of the table. Each cam operates its table part when the
camshaft is moved to a particular position. The camshaft is moved
by a threaded shaft which has nuts which are driven to any one of a
plurality of positions by a motor controlled by manually actuated
selector switches. The selector switches are connected in the
circuit with the motor in such a manner that when a selector switch
is depressed, the threaded shaft will be rotated until the cam is
driven to a position where it opens the corresponding one of the
cam actuated switches and stops the motor. The movement of the
camshaft is in proportion to the movement of the cam on the
threaded shaft. The switching is carried out through a system of
relays such that the motor always drives the threaded shaft in the
direction to move the cam by the shaft through a minimum distance
to reach any new position. The threaded shaft may also be rotated
manually to move the camshaft and thus control the several
functions of the table by manual control. The control has memory
through a series of electrical relays which determine the direction
of the motor. It also has memory in that if the control crank is
stopped with the cam on the threaded shaft at an intermediate
position, the electrical control can take over and move the cam to
the next selected position.
Inventors: |
Bellucci; Edward A. (Erie,
PA), Winschel; Carl J. (Fairview, PA) |
Assignee: |
American Sterilizer Company
(Erie, PA)
|
Family
ID: |
25368370 |
Appl.
No.: |
04/876,690 |
Filed: |
November 14, 1969 |
Current U.S.
Class: |
5/616 |
Current CPC
Class: |
A61G
13/02 (20130101) |
Current International
Class: |
A61G
13/02 (20060101); A61G 13/00 (20060101); A61g
013/00 () |
Field of
Search: |
;269/325 ;5/66 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lawson; William S.
Claims
The embodiments of the invention in which an exclusive property or
privilege is claimed are defined as follows:
1. A control for a surgical table or the like comprising:
a first shaft,
a second shaft,
first motor means connected to said first shaft,
second motor means connected to said second shaft,
a plurality of position switches supported adjacent said first
shaft, connected to said first motor means,
a plurality of manual-controlled switches each corresponding to one
of said position switches connected to said first motor means,
first cam means on said first shaft selectively movable by movement
of said first shaft to engage one of said position switches
corresponding to the said manual switch whereby when a said manual
switch is actuated, said first motor means moves said first shaft,
moving said first cam means to a position corresponding to the said
manual switch which was actuated,
a plurality of actuating members on said second shaft, each said
actuating member on said second shaft corresponding to a particular
one of said manual switches,
and connecting means connecting said first shaft to said second
shaft whereby said second shaft is moved to a plurality of
positions, each said position corresponding to the particular
manual switch which was actuated,
said actuating members each being adapted to be connected to a
functional element on said surgical table and being adapted to move
said element of said table to a position corresponding to a said
manual controlled switch which was actuated.
2. The control recited in claim 1 wherein each said manual switch
has a first position and a second position,
and each of said manual switches and said position switches are
connected to said motor means in such a way that said motor means
and said second shaft is adapted to move a particular said table
element corresponding to said manual switch from a first position
when a said manual switch is moved to a first position and to move
said particular table element to a second position when said
particular manual switch is moved to a second position.
3. The control recited in claim 1 wherein said second motor means
is connected to said second shaft comprises a rotary motor whereby
said second shaft is rotated.
4. The control recited in claim 1 wherein said actuating members on
said second shaft comprise axially spaced cams on said second
shaft,
and clutch members adapted to be connected to said table
elements,
said cam members being so spaced that a particular said cam member
engages a particular said clutch member corresponding to a
particular said manual switch when a said switch is actuated.
5. The control recited in claim 1 in combination with a surgical
table having table elements comprising a backrest, a seat section,
a head section and a foot section, and said actuating members are
each connected to a said table element,
6. The control recited in claim 5 wherein each said manual switch
has a first position and a second position,
and each of said manual switches and said position switches are
connected to said motor means in such a way that said motor means
and said second shaft is adapted to move a particular said table
element corresponding to said manual switch from a first position
when a said manual switch is moved to a first position and to move
said particular table element to a second position when said
particular manual switch is moved to a second position.
7. The control recited in claim 5 wherein said second motor means
is connected to said second shaft comprises a rotary motor whereby
said second shaft is rotated.
8. The control recited in claim 5 wherein said actuating members on
said second shaft comprise axially spaced cams on said second
shaft,
and clutch members adapted to be connected to said table
elements,
said cam members being so spaced that a particular said cam member
engages a particular said clutch member corresponding to a
particular said manual switch when a said switch is actuated.
9. The control recited in claim 4 wherein said clutch members are
each connected to one of a plurality of gear means concentrically
supported on said shaft and each of said gear means is adapted to
be connected to a member of a surgical table to be actuated.
10. The control recited in claim 8 wherein said actuating members
on said second shaft comprise axially spaced cams on said second
shaft,
and clutch members adapted to be connected to said table
elements,
said cam members being so spaced that a particular said cam member
engages a particular said clutch member corresponding to a
particular said manual switch when a said switch is actuated.
11. The control recited in claim 9 wherein said cam members are
concentrically disposed on said second shaft and said gear means
and clutch members are each concentrically supported on said second
shaft,
12. The control recited in claim 10 wherein each said manual switch
has a first position and a second position,
and each of said manual switches and said position switches are
connected to said motor means in such a way that said motor means
and said second shaft is adapted to move a particular said table
element corresponding to said manual switch from a first position
when a said manual switch is moved to a first position and to move
said particular table element to a second position when said
particular manual switch is moved to a second position.
13. The control recited in claim 1 wherein said control has memory
means whereby said control may drive said table through the nearest
path to a selected position.
14. The control recited in claim 12 wherein said second motor means
is connected to said second shaft comprises a rotary motor whereby
said second shaft is rotated.
15. The control recited in claim 13 wherein said first cam means is
threadably supported on said first shaft whereby said first cam
means is moved laterally when said first shaft is rotated.
16. The control recited in claim 15 wherein said means connecting
said first shaft to said second shaft comprises a second nut
threadably supported on said first shaft,
a lever swingable about its intermediate part supported on said
control,
a first end of said lever being attached to said second nut,
a second end of said lever being connected to means on said second
shaft whereby said second shaft is moved axially when said first
shaft rotates.
Description
STATEMENT OF INVENTION
This invention relates to controls and, more particularly, to
controls in combination with surgical tables.
OBJECTS OF THE INVENTION
It is an object of the invention to provide an improved control for
controlling a plurality of functions of a machine.
Another object of the invention is to provide a control in
combination with a surgical table for controlling several functions
of the table.
Another object of the invention is to provide a control made up of
a screw shaft with a cam on the shaft to actuate a switch at a set
position while at the same time moving a lever to engage a clutch,
this clutch engagement to happen at the same time the switch is
actuated thereby shutting off the electrical power to the
motor.
Another object of the invention is to provide a selector control
having a plurality of positions which can be reached in the least
amount of time, that is, to move the control in the shortest
distance to reach one of the selected positions.
Another object of the invention is to provide a control that will
operate either manually or electrically without losing its
sequence.
Another object of the invention is to provide a selector having
memory through a series of electrical relays to tell the directions
to drive a motor to a particular station in either a forward or a
reverse direction.
Another object of the invention is to provide a remote control box
with which the operating table can be put through any configuration
within the minumum limits of the table by depressing the proper
switch.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top view of a surgical table with certain parts broken
away to show the actuating mechanism.
FIG. 2 is a side view of the surgical table with certain parts
broken away to better show the invention.
FIG. 3 is an enlarged side view of the selector assembly.
FIG. 4 is an enlarged top view of the control shaft and cams.
FIG. 5 is a side view of the parts shown in FIG. 4.
FIG. 6 is a schematic wiring diagram of the electrical controls for
the device according to the invention.
FIG. 7 is a view of a clutch actuating shaft.
FIG. 8 is an enlarged view of one end of the shaft.
FIG. 9 is a cross-sectional view taken on line 9--9 of FIG. 7.
FIG. 10 is a cross-sectional view taken on line 10--10 of FIG.
7.
FIG. 11 is a cross-sectional view taken on line 11--11 of FIG.
7.
FIG. 12 is a cross-sectional view taken on line 12--12 of FIG.
7.
FIG. 13 is a piping diagram for use with the control.
DETAILED DESCRIPTION OF THE DRAWINGS
The improvement disclosed herein lies basically in the control
device shown in FIGS. 4 and 5 which cooperate with the clutch
arrangement of FIGS. 7-12 and this control in combination with the
table.
The control device is made up basically of threaded shaft 32,
driven by motor 33. When the motor 33 is not energized by
switching, as will be later described, the threaded shaft 32 may
also be rotated by crank 56, cam shaft 52 is driven continually by
motor M1. Threaded shaft 32 has a nut which carries cam 31 and nut
35 with pin 36 on it. Pin 36 is connected to lever 54.
Lever 54 is pivoted to the table frame at 61. Its lower end has a
slot which receives pin 36. The upper end of lever 54 has a boss
received in groove 71 on shaft 52. Thus when shaft 32 is driven by
motor 33 to move nut 35 to a new position, nut 35 and rocker arm 54
pivoted about 61 will move shaft 52 axially to a new position
corresponding to the movement of cam 31 and nut 35.
Shaft 52 has spaced clutch actuating cam members 62, 63, 64 and 65
fixed to it. These actuating members each actuate one of the
clutches when they move axially with shaft 52 and cooperate with
clutches 57, 58, 59 and 60 to rotate the corresponding gears 49,
50, 51 or 52' respectively which drives the several table parts
when the shaft is moved to the position corresponding to a
particular selected position.
Switches RS1, RS2, RS3, RS4, RS5 and RS6 may be located in a
control box to be held in the hand of an operator or supported on a
suitable part of the table where it will be conveniently accessible
to the operator. Switches RS1, RS2, RS3, RS4, RS5 and RS6 are
double pole rocker switches which are normally in the "off"
position, but either switch may be actuated to either of two
positions to actuate motor 33 and consequently motor M1 and thereby
move the respective part of the table in either of two directions.
Switch PB1 is a pushbutton switch in series with each of the
switches mentioned above and acts as a safety switch. These
switches are shown connected to a circuit which will control the
back, side, legs and flex functions of the surgical table shown in
FIG. 1 and FIG. 2.
The surgical table can be put through any configuration within the
maximum limits of movement of the table by depressing the proper
one of switches RS1, RS2, RS3, RS4, RS5 or RS6.
The solenoids SR1, SR2, SR3, SR4, and SM1 and SM2 are solenoids of
relays the control the contacts having similar numbers. The parts
of switches RS1-6 are shown schematically separated but the common
terminal of RS1A will be connected mechanically to the common
terminal of the switch RS1B. Likewise, the common terminal of RS2A
will be connected mechanically to the common terminal of RS2B.
Likewise a common terminal of RS4A will be connected to the common
terminal of switch RS4B and likewise for switches RS5 and RS6.
A, B, C, and D, E, F, G, H, and J indicate the solenoids of
solenoid valves which are actuated when circuits are completed
through them by RS1-6 as shown in FIG. 6.
THE TABLE
The table 10 disclosed is of a generally conventional
configuration. The table 10 has a headrest 11, a backrest 12, a
seat section 13 and a leg section 14. The leg section 14 is pivoted
to the seat section 13 at 17. The seat section 13 is pivoted to the
back section 12 at 16. The head section 11 is pivoted to the back
section 12 at 15. The head section 11 may be adjusted relative to
the back section 12 by means of a hand knob 20. The telescoping rod
21 may slide in bracket 21' which allows the back 19 to move in a
direction to swing the headrest 11 relative to the backrest 12. The
table 10 is supported on pedestal 18 by means of a hydraulic
cylinder C by which the table may be raised and lowered. The table
can also be moved in Trendelenberg position. The table has a kidney
bridge actuating rod 22. The seat section 13 of the table is
supported on the pedestal by a pivot 30 which is connected to the
gear sector 44. The sector seats and engages the worm 45 on shaft
52, thus swinging the seat section from the position shown in full
lines in FIG. 3 to section in FIG. 2 to position shown in phantom
lines in FIG. 2 with rotation of shaft 52. The leg section 14 is
swung by a link 46 which is pivoted at 47 to the link 27 and link
27 is fixed to the shaft 28. Shaft 28 has the worm gear 48 on its
end which is driven by worm wheel 49. Worm wheels 49, 50, 51 and
52' are all supported on a shaft 52 which will be rotated by motor
M1.
THE CONTROL
Shaft 52 has spaced cams 62, 63, 64 and 65 fixed to it. When shaft
52 rotates, cam 31 actuates one of the detents 40, 41, 42 and 43.
At the same time, nut 35 swings lever 54 which rotates around pivot
61 and moves shaft 52 axially. This axial movement of shaft 52
causes one of clutches 57, 58, 59 or 60 to be actuated in proper
sequence by cams 62, 63, 64 or 65. Thus when the shaft 52 is moved
axially to one of its four positions corresponding to detents 40,
41, 42 or 43 respectively, one of cams 62, 63, 64 or 65 will have
engaged its respective clutch 57, 58, 59 or 60, driving the
corresponding gear 49, 50, 51 or 52'. The clutches 57, 58, 59 and
60 are so spaced relative to cams 62, 63, 64 and 65 that they are
actuated separately and engage and rotate the respective gear 49,
50, 51 and 52' attached to a clutch relative to cams 62, 63, 64 and
65 which move the back, side, legs and flex parts depending on its
location.
Switches SS1, SS2, SS3 or SS4 are actuated in sequence by detents
40, 41, 42 and 43 which are actuated by the cam 31.
Any one of the four functions of the table can be reached in the
least amount of time, that is, the motor 33 will rotate the shaft
32 and thus move cam 31 in the direction to move it the shortest
distance to a newly selected position. This selector will operate
manually as well as electrically through the hand crank 56, that
is, shaft 52 may be operated by crank 56 rather than motor 33.
These cams are so located on shaft 52 that they actuate the
clutches in the proper sequence simultaneously when shaft 52 is
moved lineally with switches SS1, SS2, SS3 and SS4.
It will be noted that the selector possesses memory through the
series of relays shown in FIG. 6 which tell the motor which way to
turn because at one time a station may need a forward signal and,
at another time, the same station may need a reverse signal. The
control also possesses memory when used manually without power and
is stopped between stations by correcting its direction when
electrically actuated and it moves to its corrected position. This
memory is accomplished by use of two relays shown in FIG. 6.
To put the table in flex position from any other position, depress
PB1 and RS4, RS4 being a rocker switch with center off can be
pressed one direction for forward and the opposite direction for
reverse as this can be seen by the "A" set of contacts (RS4A). RS4B
does not matter which direction that it is pressed as this only
selects. When PB1 is depressed, solenoid C is actuated which turns
on the hydraulic pump motor and closes the circuit to RS4A which
completes the circuit to Sol. "FWD" or "REV" but does not actuate
it because this is held back by SR4 being energized, thus opening
the circuit to solenoid "H" or "J" until the selector reaches its
position when SR4 is actuated thus closing contacts and sending
signal to So. "A" (Sol. Valve) causing a hydraulic motor Item 33 to
turn a screw shaft 32 which items 35 and 36 and cam 31 are also
threaded and connected to shaft 32. While item 36 connects to item
54 and as screw shaft 32 turns, it pivots item 54 about point "E"
and the cam moves with item 36 (same lineal distance) and operates
limit switch per FIG. 3 items 40 or 41, or 42 or 43 or per FIG. 6
SS1, SS2, SS3 or SS4 depending on the one selected which is
mechanically in time so that as lever item 54 moves item 53 into
selected position, the cam reaches the proper switch thus
deenergizing SR4 and So. "A" or "B" and energizing Sol. "H" or "J,"
completing the circuit for hydraulic motor M-1 actuation through
the forward or reverse solenoid valves (H or J).
In the event that the hand crank is stopped when cam 31 is not over
a switch 40, 41, 42 or 43 and the table is again used with electric
power, when one of switches RS1 through RS4 is depressed, the cam
will be moved to the next switch SS1 through SS4 and correct itself
of its going in the wrong direction.
Referring to FIG. 13, hydraulic motor M3 drives pump P1 supplying
hydraulic fluid under pressure to the system. Hydraulic pressure
can also be provided by manual pump P2. Fluid is pumped from sump
S2 to the system through strainer S1. Solenoid valve D-E having
solenoids D and E raise and lower the table by means of cylinder C.
Hydraulic motors M1, M2 and 33 are driven by this fluid under
pressure applied through the solenoid valves E-F, G-H and J.
The foregoing specification sets forth the invention in its
preferred practical forms but the structure shown is capable of
modification within a range of equivalents without departing from
the invention which is to be understood is broadly novel as is
commensurate with the appended claims.
* * * * *