SURGICAL INSTRUMENT WITH PROGRESSIVE ROTARY DRIVE SYSTEMS

• US 20160287250A1
• Filed: 03/31/2015
• Published: 10/06/2016
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Shelton, Frederick E. IV, Morgan, Jerome R., Harris, Jason L.
• Granted Patent: US 10,390,825 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/07292 Reinforcements for staple line, e.g. pledgets
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00353 one mechanical instrument performing multiple functions, e.g. cutting and grasping
• 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 2017/00477 Coupling A61B2017/0046 takes precedence
• 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 2017/07257 characterised by its anvil
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2903 transferring rotary motion
• CPC Class Codes: A61B 2017/2932 Transmission of forces to jaw members
• 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 2090/034 : abutting on parts of the device itself
• CPC Class Codes: A61B 2090/061 : for measuring dimensions, e.g. length
• CPC Class Codes: A61B 34/30 : Surgical robots

Abstract

A surgical instrument can comprise a rotary input shaft and a surgical end effector that comprises a first jaw and a second jaw that is movable relative to the first jaw. The surgical instrument can further comprise a firing shaft that operably interfaces with the rotary input shaft. A firing member is movably supported in one of the first and second jaws. A closure member is in threaded engagement with the rotary input shaft such that rotation of the rotary input shaft in a first direction causes the closure member to move the second jaw to the closed position. The closure member remains in threaded engagement with the rotary input shaft to positively retain the second jaw in the closed position while continued rotation of the rotary input shaft in the first direction drives the firing member from a start position to an end position.

Claims

1. A surgical instrument, comprising:

a rotary input shaft;

means for selectively applying rotary input motions to said rotary input shaft;

a surgical end effector, comprising;

a first jaw;

a second jaw selectively movable relative to said first jaw between an open and closed position;

a firing shaft operably interfacing with said rotary input shaft such that said firing shaft rotates in response to rotation of said rotary input shaft;

a firing member movably supported in one of said first and second jaws for selective axial movement between start and end positions in response to rotation of said firing shaft; and

a closure member in threaded engagement with said rotary input shaft such that rotation of said rotary input shaft in a first direction causes said closure member to move said second jaw to said closed position, said closure member remaining in threaded engagement with said rotary input shaft to retain said second jaw in said closed position while continued rotation of said rotary input shaft in said first direction drives said firing member from said start position to said end position.

2. The surgical instrument of claim 1, wherein said first jaw comprises a surgical staple cartridge and said second jaw comprises an anvil, and wherein said firing member comprises:

a tissue cutting surface; and

a wedge for driving surgical staples from said surgical staple cartridge into forming contact with said anvil.

3. The surgical instrument of claim 1, wherein said input shaft and said firing shaft are not coaxially aligned.

4. The surgical instrument of claim 1, wherein said firing shaft comprises a proximal set of threads having a first lead and a distal set of threads having a second lead that differs from said first lead.

5. The surgical instrument of claim 4, wherein said second lead is greater than said first lead.

6. The surgical instrument of claim 2, wherein said firing member is configured to engage said anvil as said firing member moves between said start and end positions.

7. The surgical instrument of claim 1, wherein said firing member is configured to space said first and second jaws at a desired distance from each other as said firing member moves between said start and end positions.

8. The surgical instrument of claim 1, wherein said means for selectively applying comprises an electric motor.

9. The surgical instrument of claim 1, wherein said means for selectively applying comprises a robotic system.

10. A surgical instrument, comprising:

an elongate shaft assembly comprising an input shaft;

a surgical end effector, comprising;

a staple cartridge portion;

an anvil supported for selective movement relative to said staple cartridge portion;

a firing shaft operably supported by said staple cartridge portion, said firing shaft operably interfacing with said input shaft such that said firing shaft is actuated upon application of an actuation motion to said input shaft;

a firing member movably supported in said staple cartridge portion for selective axial movement between start and end positions in response to said actuation of said firing shaft; and

a closure member operably interfacing with said input shaft and configured to axially move from a beginning position to an ending position, and wherein a clamped position is located intermediate said beginning and ending positions, said clamped position corresponding to a position wherein said closure member retains said anvil in a fully closed position, and wherein further actuation of said input shaft after said closure member has attained said clamping position causes said firing member to move from said start to said end position and said closure member to move from said clamping position to said ending position while retaining said anvil in said fully closed position.

11. The surgical instrument of claim 10, wherein said closure member comprises at least one pivot pin received in a corresponding pin slot in a mounting portion of said anvil portion, and wherein each said pin slot comprises:

a proximal slot portion corresponding to said beginning position of said closure member; and

a distal slot portion joining said proximal slot portion at an apex point corresponding to said clamped position such that said distal slot portion is not axially aligned with said proximal slot portion.

12. The surgical instrument of claim 10, wherein said firing shaft is rotatably actuated by applying said actuation motion to said input shaft and wherein said firing member is threadably engaged with said firing shaft.

13. The surgical instrument of claim 10, wherein said input shaft and said firing shaft are not coaxially aligned.

14. The surgical instrument of claim 12, wherein said firing shaft comprises a proximal set of threads having a first lead and a distal set of threads having a second lead that differs from said first lead.

15. The surgical instrument of claim 14, wherein said second lead is greater than said first lead.

16. The surgical instrument of claim 10, wherein said closure member is threadably engaged with said input shaft.

17. The surgical instrument of claim 10, further comprising means for applying said actuation motion to said input shaft.

18. The surgical instrument of claim 17, wherein said means for applying comprises an electric motor.

19. The surgical instrument of claim 17, wherein said means for applying comprises a robotic system.

20. A surgical instrument system, comprising:

a housing;

a motor operably supported by said housing and configured to generate rotary motions;

a rotary input shaft configured to receive said rotary motions from said motor;

a surgical end effector, comprising;

a staple cartridge portion;

an anvil supported for selective movement relative to said staple cartridge portion;

a firing shaft operably supported by said staple cartridge portion, said firing shaft operably interfacing with said input shaft such that said firing shaft is actuated upon application of said rotary motions to said rotary input shaft;

a firing nut comprising a tissue cutting surface and a wedge, said firing nut in threaded engagement with a threaded section of said firing shaft comprising;

a proximal thread segment comprising a first thread lead; and

a distal thread segment comprising a second thread lead that is greater than said first thread lead; and

a closure nut in threaded engagement with said rotary input shaft such that rotation of said rotary input shaft in a first direction causes said closure nut to move said anvil from an open to a closed position, said closure nut remaining in threaded engagement with said rotary input shaft to retain said anvil in said closed position while continued rotation of said rotary input shaft in said first direction drives said firing nut from threaded engagement with said proximal thread segment to threaded engagement with said distal thread segment.