SURGICAL INSTRUMENTS WITH CLOSURE STROKE REDUCTION ARRANGEMENTS

• US 20170224343A1
• Filed: 02/09/2016
• Published: 08/10/2017
• Est. Priority Date: 02/09/2016
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Baxter, III, Chester O., Weaner, Lauren S., Vendely, Michael J., Rector, Jason M., Swayze, Jeffrey S.
• Granted Patent: US 10,470,764 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• 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 17/072 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 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 17/32 Surgical cutting instruments A61B18/042 takes precedence; suture cutters A61B17/0467; instruments for ligaturing or cutting A61B17/128; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/00424 ergonomic, e.g. fitting in fist
• 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 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/00862 elastic or resilient for sutures A61B2017/0618
• 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 2017/2908 Multiple segments connected by articulations
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/293 with means preventing relative rotation between the shaft and the actuating rod
• 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 2034/715 : Cable tensioning mechanisms for removing slack
• CPC Class Codes: A61B 2090/0808 : for indicating correct assembly of components, e.g. of the surgical apparatus
• CPC Class Codes: A61B 90/30 : Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure

Abstract

A surgical instrument comprising a surgical end effector that includes a first jaw and a second jaw, wherein one of the first and second jaws is selectively movable relative to the other of the first and second jaws upon application of a closure motion to the surgical end effector. In one form, a proximal closure member is configured to be axially advanced a complete closure stroke distance upon application of a closure actuation motion thereto. A distal closure member movably interfaces with the proximal closure member such that the distal closure member moves an axial closure distance in response to axial movement of the proximal closure member through the complete closure stroke distance to thereby cause the distal closure member to apply the closure motion to the surgical end effector. In at least one arrangement, the axial closure distance is less than the complete closure stroke distance.

Claims

1. A surgical instrument, comprising:

a surgical end effector comprising a first jaw and a second jaw, wherein one of said first jaw and said second jaw is selectively movable relative to the other of said first jaw and said second jaw upon application of a closure motion to said surgical end effector; and

an elongate shaft assembly, comprising;

a closure member assembly supported for axial travel relative to said surgical end effector, said closure member assembly comprising;

a proximal closure member configured to be axially advanced a complete closure stroke distance upon application of a closure actuation motion thereto; and

a distal closure member movably interfacing with said proximal closure member such that said distal closure member moves an axial closure distance in response to axial movement of said proximal closure member through said complete closure stroke distance to thereby cause said distal closure member to apply said closure motion to said surgical end effector and wherein said axial closure distance is less than said complete closure stroke distance.

2. The surgical instrument of claim 1, wherein said proximal closure member comprises a distal end and wherein said distal closure member comprises a proximal end that is slidably affixed to said distal end of said proximal closure member such that, as said proximal closure member moves through said complete closure stroke distance, said distal closure member does not begin to axially move through said axial closure distance until said proximal closure member has axially moved through a portion of said complete closure stroke distance.

3. The surgical instrument of claim 2, wherein said elongate shaft assembly comprises a spine assembly coupled to said surgical end effector and wherein said proximal closure member comprises a proximal closure sleeve supported on a portion of said spine assembly for axial travel through said complete closure stroke distance thereon and wherein said distal closure member comprises a distal closure sleeve slidably journaled on another portion of said spine assembly and is movably coupled to said proximal closure sleeve.

4. The surgical instrument of claim 3, wherein said proximal closure sleeve has an opening in a distal end thereof and wherein a proximal end of said distal closure sleeve extends through said opening and is configured to prevent said proximal end of said distal closure sleeve from separating from said distal end of said proximal closure sleeve.

5. The surgical instrument of claim 4, wherein said distal end of said proximal closure sleeve is flared inwardly around said opening and wherein said proximal end of said distal closure sleeve is flared outwardly to prevent said proximal end of said distal closure sleeve from separating from said distal end of said proximal closure sleeve while facilitating axial travel of said proximal closure sleeve through a portion of said complete closure stroke distance relative to said distal closure sleeve.

6. The surgical instrument of claim 3, wherein said proximal closure sleeve comprises an inwardly extending flange defining an opening in a distal end thereof and wherein a proximal end of said distal closure sleeve extends through said opening and comprises an outwardly extending flange that cooperates with said inwardly extending flange to prevent said proximal end of said distal closure sleeve from separating from said distal end of said proximal closure sleeve.

7. The surgical instrument of claim 3, wherein said proximal closure sleeve comprises a contact portion that is proximal to said distal end of said proximal closure sleeve, said contact portion configured to axially contact said proximal end of said distal closure sleeve after said proximal closure sleeve has axially advanced through a predetermined portion of said complete closure stroke distance.

8. The surgical instrument of claim 7, wherein said contact portion comprises a crimped portion of said proximal closure sleeve.

9. The surgical instrument of claim 7, wherein said contact portion comprises at least one inwardly extending tab member formed in said proximal closure sleeve and orientated to contact a corresponding portion of said proximal end of said distal closure sleeve.

10. The surgical instrument of claim 7, wherein said contact portion comprises an inwardly extending flange formed on a stop member attached to an inside wall of said proximal closure sleeve.

11. A surgical instrument, comprising:

a surgical end effector comprising a first jaw and a second jaw, wherein one of said first jaw and said second jaw is selectively movable relative to the other of said first jaw and said second jaw upon application of a closure motion to said surgical end effector; and

an elongate shaft assembly, comprising;

a closure member assembly supported for axial travel relative to said surgical end effector, said closure member assembly comprising;

a proximal closure member configured to be axially advanced a complete closure stroke distance upon application of a closure actuation motion thereto; and

a distal closure member supported for axial travel an axial closure distance that is less than said complete closure stroke distance to apply said closure motion to said surgical end effector; and

a closure stroke reduction assembly interfacing with said proximal closure member and said distal closure member such that, as said proximal closure member moves through said complete closure stroke distance, said distal closure member does not begin to axially move through said closure distance until said proximal closure member has axially moved through a portion of said complete closure stroke distance.

12. The surgical instrument of claim 11, wherein said elongate shaft assembly comprises a spine assembly coupled to said surgical end effector and wherein said proximal closure member comprises a proximal closure sleeve supported on a portion of said spine assembly for axial travel through said complete closure stroke distance thereon and wherein said distal closure member comprises a distal closure sleeve slidably supported on another portion of said spine assembly for axial travel through said closure distance.

13. The surgical instrument of claim 12, wherein said closure stroke reduction assembly comprises:

a proximal mounting member coupled to said proximal closure sleeve for axial travel therewith through said complete closure stroke distance; and

a distal mounting member coupled to said distal closure sleeve for axial travel therewith through said closure distance.

14. The surgical instrument of claim 13, wherein said proximal mounting member comprises a contact portion configured to contact at least one of said proximal mounting member and said proximal closure sleeve after said proximal closure sleeve has moved through said portion of said complete closure stroke distance.

15. The surgical instrument of claim 14, wherein said distal mounting member defines a distal ledge and wherein said proximal mounting member defines a proximal ledge spaced from said distal ledge to form a distal travel zone therebetween and wherein said contact portion is spaced from said at least one of said proximal mounting member and said proximal closure sleeve to define a proximal travel zone between said contact portion and said at least one of said proximal mounting member and said proximal closure sleeve.

16. The surgical instrument of claim 15, wherein said proximal travel zone has a proximal axial width and wherein said distal travel zone has a distal axial width that differs from said proximal axial width.

17. The surgical instrument of claim 13, further comprising a biasing member between said proximal mounting member and said distal mounting member.

18. The surgical instrument of claim 16, further comprising a biasing member supported within said distal travel zone.

19. A surgical instrument, comprising:

a surgical end effector comprising a first jaw and a second jaw wherein one of said first jaw and said second jaw is selectively movable relative to the other of said first jaw and said second jaw upon application of a closure motion to said surgical end effector; and

an elongate shaft assembly, comprising;

a closure member assembly supported for axial travel relative to said surgical end effector, said closure member assembly comprising;

a proximal closure member configured to be axially advanced a complete closure stroke distance upon application of a closure actuation motion thereto, said proximal closure member configured to apply a maximum closure force upon reaching an end of said maximum closure stroke distance;

a distal closure member supported for axial travel an axial closure distance that less than said complete closure stroke distance to apply said closure motion to said surgical end effector; and

a closure stroke reduction assembly interfacing with said proximal closure member and said distal closure member such that, as said proximal closure member moves through said complete closure stroke distance, said proximal closure member applies another closure force to said distal closure member that is less than said maximum closure force.

20. The surgical instrument of claim 19, wherein said closure stroke reduction assembly comprises:

a proximal mounting member coupled to said proximal closure member for axial travel therewith through said complete closure stroke distance;

a distal mounting member coupled to said distal closure member for axial travel therewith through said axial closure distance; and

a biasing member between a portion of said proximal mounting member and another portion of said distal mounting member.