US 11,832,815 B2
Stapling device with continuously parallel jaws
Rajat Ravindra Rokde, Pune (IN); and Rajanikanth Mandula, Hyderabad (IN)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Dec. 6, 2021, as Appl. No. 17/542,713.
Application 17/542,713 is a continuation of application No. 16/872,701, filed on May 12, 2020, granted, now 11,191,537.
Prior Publication US 2022/0087674 A1, Mar. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/068 (2006.01); A61B 17/072 (2006.01); A61B 17/115 (2006.01)
CPC A61B 17/0686 (2013.01) [A61B 17/068 (2013.01); A61B 17/072 (2013.01); A61B 17/07207 (2013.01); A61B 17/115 (2013.01); A61B 2017/07214 (2013.01); A61B 2017/07228 (2013.01); A61B 2017/07257 (2013.01); A61B 2017/07285 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A tool assembly for a surgical stapling device, comprising:
a first jaw having a first surface;
a second jaw having a second surface facing the first surface, the second jaw defining first and second bores, the second jaw movable in relation to the first jaw between an open position and a clamped position;
a drive member supporting a rack having a first side and a second side, the drive member movable from a retracted position to an advanced position; and
an approximation drive assembly including a first lead screw received within the first bore, a second lead screw received within the second bore, a first pinion supported on the first lead screw, and a second pinion supported on the second lead screw, the first pinion engaging the first side of the rack and the second pinion engaging the second side of the rack,
wherein movement of the drive member from the retracted position toward the advanced position advances the rack to rotate the first pinion and the second pinion, and wherein rotating the first pinion rotates the first lead screw within the first bore and rotating the second pinion rotates the second lead screw within the second bore to move the second jaw in relation to the first jaw from the open position to the clamped position.