US 11,051,819 B2
Latch to prevent back-driving of circular surgical stapler
Gregory J. Bakos, Mason, OH (US); Michael A. Jacobs, Vilia Hills, KY (US); Michael J. Stokes, Cincinnati, OH (US); Gregory G. Scott, Cincinnati, OH (US); Disha V. Labhasetwar, Cincinnati, OH (US); and Nicholas M. Morgan, West Chester, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by ETHICON LLC, Guaynabo, PR (US)
Filed on Oct. 15, 2018, as Appl. No. 16/159,848.
Prior Publication US 2020/0113565 A1, Apr. 16, 2020
Int. Cl. A61B 17/115 (2006.01); A61B 90/00 (2016.01); A61B 17/00 (2006.01); A61B 17/072 (2006.01)
CPC A61B 17/1155 (2013.01) [A61B 90/08 (2016.02); A61B 17/072 (2013.01); A61B 90/03 (2016.02); A61B 2017/00367 (2013.01); A61B 2017/00407 (2013.01); A61B 2017/00477 (2013.01); A61B 2090/034 (2016.02); A61B 2090/0811 (2016.02)] 15 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
(a) a handle assembly comprising a body and a trigger;
(b) a shaft assembly comprising an outer tubular member extending distally from the body;
(c) an end effector comprising:
(i) a staple deck fixed relative to the outer tubular member,
(ii) a staple driver, wherein the staple driver is operable to actuate relative to the staple deck between an unfired position and a fired position, wherein the trigger is operable to actuate the staple driver between the unfired position and the fired position, and
(iii) an elongated coupling member configured to actuate relative to the staple deck and the staple driver;
(d) an anvil configured to selectively couple with the elongated coupling member, wherein the elongated coupling member is operable to actuate the anvil relative to the staple deck to define a gap distance; and
(e) a latch assembly comprising a locking body and a resilient member configured to actuate the locking body, wherein the locking body is configured to actuate between an unlocked configuration and a locked configuration in response to the staple driver actuating between the unfired position and the fired position, wherein the locking body is configured to selectively fix the elongated coupling member relative to the staple deck in the locked configuration, wherein the resilient member is in direct engagement with both the trigger and the locking body such that a position of the locking body is dependent on a position of the trigger.