MOTOR DRIVEN SURGICAL INSTRUMENTS WITH LOCKABLE DUAL DRIVE SHAFTS

• US 20140305987A1
• Filed: 04/09/2014
• Published: 10/16/2014
• Est. Priority Date: 04/16/2013
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Parihar, Shailendra K., Koch, Robert L. Jr., Baxter, Chester O. III, Shelton, Frederick E. IV
• Granted Patent: US 9,826,976 B2
• Time in Patent Office: Days
• US Class Current: 227/175.2
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/0686 having a forming anvil staying below the tissue during stapling
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 17/282 Jaws
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00115 with audible or visual output with imaging means A61B90/37, A61B34/20
• CPC Class Codes: A61B 2017/00199 with a console, e.g. a control panel with a display
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/00367 Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
• CPC Class Codes: A61B 2017/00393 with means for switching between functions
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/0688 Packages or dispensers for surgical staplers
• CPC Class Codes: A61B 2017/07214 : Stapler heads
• CPC Class Codes: A61B 2017/07221 : curved
• CPC Class Codes: A61B 2017/07235 : containing different staples, e.g. staples of different shapes, sizes or materials
• CPC Class Codes: A61B 2017/07242 : achieving different staple heights during the same shot, e.g. using an anvil anvil having different heights or staples of different sizes
• CPC Class Codes: A61B 2017/0725 : with settable gap between anvil and cartridge, e.g. for different staple heights at different shots
• CPC Class Codes: A61B 2017/2902 : characterized by features of the actuating rod
• CPC Class Codes: A61B 2017/2903 : transferring rotary motion
• CPC Class Codes: A61B 2017/2912 : transmission of forces to actuating rod or piston
• CPC Class Codes: A61B 2017/2922 : toggle linkages
• CPC Class Codes: A61B 2017/2923 : Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2932 : Transmission of forces to jaw members
• CPC Class Codes: A61B 2017/2933 : camming or guiding means
• CPC Class Codes: A61B 2017/2936 : Pins in guiding slots
• CPC Class Codes: A61B 2017/2943 : Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2946 : Locking means
• CPC Class Codes: A61B 2090/038 : during shipment
• CPC Class Codes: A61B 2090/0811 : for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 34/30 : Surgical robots
• CPC Class Codes: Y02A 90/10 : Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

Motor driven surgical instruments that include a first rotary drive system and a second rotary drive system. Various forms include a transmission assembly that is selectively shiftable between a first drive position wherein rotary motion generated by the motor is transferred to the first rotary drive system and a second drive position wherein rotary motion generated by the motor is transferred to the second rotary drive system. Various forms further include a locking assembly configured to mechanically prevent rotation of the second rotary drive system when the transmission assembly is in the first drive position as well as to prevent rotation of the first rotary drive system when the transmission assembly is in the second drive position.

Claims

1. A surgical instrument, comprising:

a motor including a motor output shaft;

a first rotary drive system;

a second rotary drive system;

a transmission assembly in operable engagement with the motor output shaft and being selectively shiftable between a first drive position wherein rotation of the motor output shaft is imparted to the first rotary drive system and a second drive position wherein rotation of the motor output shaft is imparted to the second rotary drive system; and

a locking assembly supported by the transmission assembly and configured to mechanically prevent actuation of the second rotary drive system when the transmission assembly is in the first drive position, said locking assembly further configured to prevent actuation of the first rotary drive system when the transmission assembly is in the second drive position.

2. The surgical instrument of claim 1 wherein the transmission assembly is axially shiftable between the first and second drive positions by a solenoid operably coupled thereto.

3. The surgical instrument of claim 1 wherein the transmission assembly comprises:

a transmission carriage in operable engagement with the motor output shaft, the transmission carriage being supported for selective axial travel between the first and second drive positions;

a transmission link operably coupled to the transmission carriage; and

a firing trigger coupled to the transmission link such that when the firing trigger is depressed, the transmission link moves the transmission carriage from the first drive position to the second drive position.

4. The surgical instrument of claim 1 wherein the first rotary drive system comprises a first rotary drive shaft including a first drive gear non-rotatably supported thereon and wherein the second rotary drive system comprises a second rotary drive shaft including a second drive gear non-rotatably supported thereon and an intermediate drive gear rotatably supported thereon in meshing engagement with the first drive gear and wherein the transmission assembly comprises a transmission carriage rotatably supporting a carriage gear thereon, the transmission carriage supported for axial travel between the first drive position wherein the carriage gear is in meshing engagement with a motor gear on the motor output shaft and the intermediate gear and the second drive position wherein the carriage gear is in meshing engagement with the motor gear and the second drive gear.

5. The surgical instrument of claim 4 wherein the locking assembly comprises:

a first drive lock on the transmission carriage, the first drive lock positioned to lockingly engage the second drive gear when the transmission carriage is in the first drive position to prevent rotation of the second drive gear; and

a second drive lock on the transmission carriage, the second drive lock positioned to lockingly engage the intermediate drive gear when the transmission carriage is in the second drive position to prevent rotation of the intermediate drive gear.

6. The surgical instrument of claim 1 wherein the first rotary drive system comprises a first rotary drive shaft having a first drive gear non-rotatably attached thereto and wherein the second rotary drive system comprises:

a second rotary drive shaft;

a planetary gear assembly comprising;

a planetary gear carrier non-rotatably attached to the second rotary drive shaft;

a plurality of planetary gears rotatably supported on the planetary gear carrier, each said planetary gear in meshing engagement with a sun gear non-rotatably attached to the motor output shaft and wherein the second rotary drive further comprises;

a ring gear assembly rotatably supported on the second rotary drive shaft, the ring gear assembly including an internal ring gear in meshing engagement with the planetary gears and an external ring gear in meshing engagement with the first drive gear and wherein the locking assembly comprises;

a first lock lug portion on the transmission assembly configured to lockingly engage the planetary gear carrier when the transmission assembly is in said first drive position to prevent rotation of the planetary gear carrier and the second rotary drive shaft from rotating such that rotation of the motor output gear causes the planetary gears to rotate relative to the planetary gear carrier and impart rotary motion to the ring gear assembly and the first drive gear; and

a second lock lug portion on the transmission assembly configured to lockingly engage the ring gear assembly when the transmission assembly is in the second drive position to prevent rotation of the ring gear assembly such that rotation of the motor output gear causes the planetary gears to rotate the planetary gear carrier and impart rotary motion to the second rotary drive shaft.

7. The surgical instrument of claim 6 wherein the transmission assembly is axially shiftable between the first and second drive positions by a solenoid operably coupled thereto.

8. The surgical instrument of claim 1 wherein the first rotary drive system is configured to be operably coupled to a first rotary driven system operably supported in a surgical end effector that is attached to the surgical instrument and wherein the second rotary drive system is configured to be operably coupled to a second rotary driven system in the surgical end effector.

9. The surgical instrument of claim 4 wherein the first rotary drive shaft defines a first shaft axis and wherein the second rotary drive shaft defines a second shaft axis that is parallel to the first shaft axis.

10. A surgical instrument, comprising:

a motor including a motor output shaft;

a first rotary drive system;

a second rotary drive system;

a transmission assembly in operable engagement with the motor output shaft and being selectively shiftable between a first drive position wherein rotation of the motor output shaft is imparted to the first rotary drive system and a second rotary drive position wherein rotation of the motor output shaft is imparted to the second rotary drive system; and

means for mechanically preventing rotation of the second rotary drive system when the transmission assembly is in the first drive position, said means for mechanically preventing further configured to prevent rotation of the first rotary drive system when the transmission assembly is in the second drive position.

11. A surgical instrument, comprising:

a housing;

a motor supported by the housing and including a motor output shaft;

a first rotary drive system operably supported by the housing;

a second rotary drive system operably supported by the housing; and

a transmission assembly movably supported in the housing in operable engagement with the motor output shaft and being selectively shiftable between a first drive position wherein rotation of the motor output shaft is imparted to the first rotary drive system and a second rotary drive position wherein rotation of the motor output shaft is imparted to the second rotary drive system.

12. The surgical instrument of claim 11 wherein the transmission assembly is axially movable within the housing between the first drive position and the second drive position.

13. The surgical instrument of claim 12 wherein the transmission assembly is axially shiftable between the first and second drive positions by a solenoid operably coupled thereto.

14. The surgical instrument of claim 11 wherein the transmission assembly is selectively pivotable within the housing between the first and second drive positions.

15. The surgical instrument of claim 11 wherein the first rotary drive system comprises:

a first rotary drive shaft supported by the housing and including a first drive pulley non-rotatably coupled thereto and wherein the second rotary drive system comprises;

a second rotary drive shaft supported by the housing and including a second drive pulley non-rotatably attached thereto and wherein the motor output shaft includes a first motor pulley non-rotatably attached thereto and a second motor pulley non-rotatably attached thereto and wherein the surgical instrument further comprises;

a first drive belt in slack engagement with the first motor pulley and the first drive pulley; and

a second drive belt in slack engagement with the second motor pulley and the second drive pulley and wherein the transmission assembly comprises;

an idler carriage supporting a first idler pulley and a second idler pulley, the idler carriage being selectively laterally movable between the first drive position wherein the first drive pulley engages the first drive belt to remove slack therefrom such that rotation of the first motor pulley results in the rotation of the first drive pulley and first rotary drive shaft, and the second drive position wherein the second drive pulley engages the second drive belt to remove slack therefrom such that rotation of the second motor pulley results in rotation of the second drive pulley and the second rotary drive shaft.

16. The surgical instrument of claim 11 wherein the first rotary drive system comprises a first rotary drive shaft supported by the housing and includes a first drive pulley non-rotatably coupled thereto and wherein the second rotary drive system comprises a second rotary drive shaft supported by the housing and includes a second drive pulley non-rotatably attached thereto and wherein the transmission assembly further comprises a transmission shaft assembly movably supported on the motor output shaft for axial travel thereon and rotation therewith, the transmission shaft assembly configured for selective meshing engagement with first and second motor pulleys rotatably supported thereon such that when the transmission shaft assembly is in the first drive position, the first motor pulley rotates with the transmission shaft assembly and the second motor pulley is freewheeling thereon and when the transmission shaft assembly is in the second drive position, the second motor pulley rotates with the transmission shaft assembly and the first motor pulley is freewheeling thereon and wherein the transmission assembly further comprises:

a first drive belt in driving engagement with the first drive pulley and the first motor pulley; and

a second drive belt in driving engagement with the second drive pulley and the second motor pulley.

17. The surgical instrument of claim 16 wherein the transmission assembly further comprises a transmission carriage axially movable within the housing and operably coupled to the transmission shaft assembly to axially move the transmission shaft assembly between the first and second drive positions while enabling the transmission shaft assembly to rotate relative to the transmission carriage.

18. The surgical instrument of claim 17 wherein the transmission carriage is axially shiftable by a solenoid operably coupled thereto.

19. The surgical instrument of claim 11 wherein the first rotary drive system is configured to be operably coupled to a first rotary driven system operably supported in a surgical end effector and wherein the second rotary drive system is configured to be operably coupled to a second rotary driven system in the surgical end effector.

20. The surgical instrument of claim 15 wherein the first rotary drive shaft defines a first shaft axis and wherein the second rotary drive shaft defines a second shaft axis that is parallel to the first shaft axis.