US 11,864,822 B2
Deployment mechanisms for surgical instruments
John J. Kappus, Denver, CO (US); and David N. Heard, Boulder, CO (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Sep. 15, 2020, as Appl. No. 17/021,153.
Application 17/021,153 is a division of application No. 14/052,871, filed on Oct. 14, 2013, granted, now 10,772,674.
Claims priority of provisional application 61/726,980, filed on Nov. 15, 2012.
Prior Publication US 2020/0405377 A1, Dec. 31, 2020
Int. Cl. A61B 18/00 (2006.01); A61B 18/14 (2006.01); A61B 17/29 (2006.01); A61B 17/28 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 17/28 (2013.01); A61B 17/29 (2013.01); A61B 18/1442 (2013.01); A61B 2017/2845 (2013.01); A61B 2017/2912 (2013.01); A61B 2017/2919 (2013.01); A61B 2017/2923 (2013.01); A61B 2017/2932 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00083 (2013.01); A61B 2018/00601 (2013.01); A61B 2018/1455 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical instrument, comprising:
an end effector assembly including first and second jaw members, at least one of the jaw members movable relative to the other between a spaced-apart position and an approximated position for grasping tissue therebetween;
a first deployable component selectively movable relative to the jaw members between a retracted position and an extended position;
a trigger assembly coupled to the first deployable component and selectively movable from an un-actuated position to an actuated position to move the first deployable component from the retracted position to the extended position;
a biasing member coupled to the trigger assembly and configured to apply a biasing force to the trigger assembly to bias the trigger assembly towards the un-actuated position;
a second deployable component selectively movable relative to the jaw members between a stored position and a use position;
a lever assembly coupled to the second deployable component and selectively movable from a first position to a second position to move the second deployable component from the stored position to the use position, wherein the lever assembly and the trigger assembly are operably coupled with one another:
such that actuation initiated at the lever assembly effects movement of the lever assembly from the first position towards the second position and also effects movement of the trigger assembly from the un-actuated position towards the actuated position; and
such that actuation initiated at the trigger assembly effects movement of the trigger assembly from the un-actuated position to the actuated position independently of the lever assembly; and
a linkage assembly coupled to the lever assembly and the biasing member, the linkage assembly configured to reduce the biasing force applied to the trigger assembly when actuation initiated at the lever assembly effects movement of the trigger assembly from the un-actuated position towards the actuated position compared to the biasing force applied to the trigger assembly when actuation initiated at the trigger assembly effects movement of the trigger assembly from the un-actuated position towards the actuated position independently of the lever assembly with the lever assembly remaining in the first position.