US 12,433,626 B2
Drive mechanisms for surgical instruments
Zachary S. Heiliger, Nederland, CO (US); and Dylan R. Kingsley, Broomfield, CO (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Sep. 21, 2022, as Appl. No. 17/949,286.
Claims priority of provisional application 63/281,136, filed on Nov. 19, 2021.
Prior Publication US 2023/0157715 A1, May 25, 2023
Int. Cl. A61B 17/295 (2006.01); A61B 17/00 (2006.01); A61B 17/29 (2006.01); A61B 34/30 (2016.01)
CPC A61B 17/295 (2013.01) [A61B 34/30 (2016.02); A61B 2017/00477 (2013.01); A61B 2017/2946 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A surgical instrument for use with a robotic surgical system, comprising:
a housing;
a shaft extending distally from the housing;
first and second jaw members disposed at a distal end of the shaft, wherein at least the first jaw member is configured to move relative to the second jaw member to grasp tissue therebetween;
a knife blade configured to cut tissue;
a drive input having a first plurality of teeth and configured to receive a rotational input from a robotic surgical system to drive rotation of an input shaft and translate the knife blade;
a knife blade lock having a second plurality of teeth and configured to move between a locked position wherein the second plurality of teeth interlock with the first plurality of teeth to prevent rotation of the drive input, and an unlocked position wherein the second plurality of teeth is disengaged from the first plurality of teeth such that the drive input is permitted to rotate in response to receiving the rotational input to drive rotation of the input shaft; and
a spring coupled to a proximal end portion of the input shaft and configured to bias the knife blade lock into the locked position,
wherein the second plurality of teeth is configured to interlock with the first plurality of teeth when the knife blade lock is in the locked position to prevent bi-directional rotation of the drive input.