Compact jaw including split pivot pin

• US 8,480,671 B2
• Filed: 01/22/2010
• Issued: 07/09/2013
• Est. Priority Date: 01/22/2010
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Mueller, Peter M.
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): Ram, Jocelyn D
• Application Number:
  US12/692,414
• Publication Number:
  US 20110184405A1
• Time in Patent Office: 1,264 Days
• Field of Search: 606/51, 606/52, 606/205, 606/207
• US Class Current: 606/51
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 17/295 combined with cutting implements
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 2017/2945 Curved jaws
• CPC Class Codes: A61B 2017/2947 Pivots
• CPC Class Codes: A61B 2018/00404 Blood vessels other than those in or around the heart
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/00595 Cauterization
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/00619 Welding
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1432 curved
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/1861 with an instrument inserted into a body lumen or cavity, e.g. a catheter

Abstract

An end effector assembly for use with a forceps includes a pair of jaw members, a knife assembly, and one or more cam assemblies. One or more of the jaw members are moveable relative to the other about a pivot between open and closed positions. One or more of the jaw members include a knife channel. The pivot includes first and second sections defining a passage therebetween. The knife assembly includes a knife blade and an actuation shaft. The knife blade is disposed distally relative to the pivot. The actuation shaft is configured for slidable translation through the passage to allow selective advancement of the knife blade through the knife channel. The one or more cam assemblies are operably coupled to the one or more moveable jaw members and are actuatable to move the one or more jaw members between the open and closed positions for grasping tissue therebetween.

Claims

1. An end effector assembly for use with a forceps, the end effector assembly comprising:

a pair of jaw members, at least one jaw member moveable relative to the other about a pivot between an open position and a closed position for grasping tissue, at least one of the jaw members including a knife channel defined therein that extends therealong, the pivot having first and second sections defining a passage therebetween;

a knife assembly including a knife blade and an actuation shaft, the knife blade disposed distally relative to the pivot and the actuation shaft configured for slidable translation through the passage defined between the first and second sections of the pivot to allow selective advancement of the knife blade through the knife channel;

at least one cam assembly operably coupled to the at least one moveable jaw member and actuatable to move the at least one jaw member between the open and the closed position for grasping tissue therebetween, wherein the at least one cam assembly includes an actuator configured to move the at least one movable jaw member between the open and the closed position upon selective longitudinal translation thereof, wherein the actuator includes at least one cam pin extending therefrom and wherein at least one jaw member defines at least one cam slot therein such that the at least one cam slot and the at least one cam pin are configured to cooperate with one another to move the at least one moveable jaw member; and

a knife tube mounted to the pivot wherein the at least one cam pin is configured to slidably engage the knife tube upon the selective longitudinal translation of the actuator, wherein the knife tube defines a recess adapted to mount each of the first and second sections of the pivot at the distal ends thereof, the distal ends of each of the first and second sections defining a profile configured to engage the recess.

2. The end effector assembly according to claim 1, further comprising an actuator tube operably associated with a forceps which is configured to longitudinally translate the actuator and permit the slidable translation of the actuation shaft therethrough.

3. The end effector assembly according to claim 2, further including a roll joint operably coupled to the actuator tube and configured to facilitate rotational movement of the jaw members.

4. The end effector assembly according to claim 1, wherein the actuator is moveable to actuate both jaw members.

5. The end effector assembly according to claim 1, wherein the knife blade is affixed to a distal end of the actuation shaft.

6. The end effector assembly according to claim 1, wherein at least one of the jaw members is adapted to connect to an electrosurgical energy source to electrosurgically treat tissue.

7. A forceps, comprising:

a housing having a shaft that extends therefrom that includes a clevis at a distal end thereof;

a pair of jaw members mounted to the clevis about a pivot, at least one jaw member moveable relative to the other about the pivot between an open position and a closed position for grasping tissue, at least one of the jaw members including a knife channel defined therein that extends therealong, the pivot having first and second sections defining a passage therebetween;

a knife assembly including a knife blade and an actuation shaft, the knife blade disposed distally relative to the pivot and the actuation shaft configured for slidable translation through the passage defined between the first and second sections of the pivot to allow selective advancement of the knife blade through the knife channel;

at least one cam assembly operably coupled to the at least one moveable jaw member and actuatable to move the at least one jaw member between the open and the closed position for grasping tissue therebetween, wherein the at least one cam assembly includes an actuator operably coupled to the housing, wherein the actuator includes at least one cam pin extending therefrom and wherein at least one jaw member defines at least one cam slot therein such that the at least one cam slot and the at least one cam pin are configured to cooperate with one another to move the at least one moveable jaw member; and

a knife tube mounted to the pivot wherein the at least one cam pin is configured to slidably engage the knife tube upon the selective longitudinal translation of the actuator, wherein the knife tube defines a recess adapted to mount each of the first and second sections of the pivot at the distal ends thereof, the distal ends of each of the first and second sections defining a profile configured to engage the recess.

8. The forceps according to claim 7, wherein the shaft of the housing includes an actuator tube that is configured to longitudinally translate the actuator and permit the slidable translation of the actuation shaft therethrough.

9. The end effector assembly according to claim 8, further including a roll joint operably coupled to the actuator tube and configured to facilitate rotational movement of the jaw members.

10. The forceps according to claim 8, wherein the actuator is moveable to actuate both jaw members.

11. The forceps according to claim 8, wherein the knife blade is affixed to a distal end of the actuation shaft.

12. The forceps according to claim 7, wherein at least one of the jaw members is adapted to connect to an electrosurgical energy source to electrosurgically treat tissue.

13. The forceps according to claim 7, wherein the first and second sections of the pivot are fixedly connected to the clevis.

14. A forceps, comprising:

a housing having a shaft that extends therefrom that includes a clevis at a distal end thereof;

a pair of jaw members mounted to the clevis about a pivot, at least one jaw member moveable relative to the other about the pivot between an open position and a closed position for grasping tissue, at least one of the jaw members including a knife channel defined therein that extends therealong, the pivot having first and second sections defining a passage therebetween;

a knife assembly including a knife blade and an actuation shaft, the knife blade disposed distally relative to the pivot and the actuation shaft configured for slidable translation through the passage defined between the first and second sections of the pivot to allow selective advancement of the knife blade through the knife channel;

at least one cam assembly operably coupled to the at least one moveable jaw member and actuatable to move the at least one jaw member between the open and the closed position for grasping tissue therebetween, wherein the at least one cam assembly includes an actuator operably coupled to the housing, wherein the actuator includes at least one cam pin extending therefrom and wherein at least one jaw member defines at least one cam slot therein such that the at least one cam slot and the at least one cam pin are configured to cooperate with one another to move the at least one moveable jaw member; and

a knife tube mounted to the pivot wherein the at least one cam pin is configured to slidably engage the knife tube upon the selective longitudinal translation of the actuator, wherein the knife tube defines a recess adapted to mount each of the first and second sections of the pivot at the distal ends thereof, the distal ends of each of the first and second sections defining a profile configured to engage the recess, wherein the actuator is configured to move the at least one jaw member between the open and the closed position upon selective longitudinal translation thereof.