US 11,944,503 B2
Systems and methods for preventing tissue migration in surgical staplers
Adam R. Dunki-Jacobs, Cincinnati, OH (US); Mark S. Ortiz, Milford, OH (US); Jonathan R. Thompson, Cincinnati, OH (US); Richard P. Nuchols, Williamsburg, OH (US); Caleb J. Hayward, Goshen, OH (US); Robert T. Means, III, Cincinnati, OH (US); and Saylan J. Lukas, Cincinnati, OH (US)
Assigned to Standard Bariatrics, Inc., Cincinnati, OH (US)
Filed by Standard Bariatrics, Inc., Cincinnati, OH (US)
Filed on Dec. 21, 2022, as Appl. No. 18/085,687.
Application 18/085,687 is a continuation of application No. 17/857,515, filed on Jul. 5, 2022.
Application 17/857,515 is a continuation of application No. 17/700,599, filed on Mar. 22, 2022, granted, now 11,452,574, issued on Sep. 27, 2022.
Claims priority of provisional application 63/164,837, filed on Mar. 23, 2021.
Prior Publication US 2023/0132795 A1, May 4, 2023
Int. Cl. A61B 17/064 (2006.01); A61B 17/072 (2006.01); A61B 90/00 (2016.01)
CPC A61B 90/03 (2016.02) [A61B 17/07207 (2013.01); A61B 2017/07257 (2013.01); A61B 2017/07271 (2013.01); A61B 2017/07285 (2013.01); A61B 2090/036 (2016.02)] 18 Claims
OG exemplary drawing
 
1. A surgical instrument, comprising:
an end effector, wherein the end effector includes:
(i) an upper jaw the upper jaw including a proximal end and a distal end;
(ii) a lower jaw, the lower jaw including a proximal end and a distal end, wherein the distal end of the upper jaw is connected to the distal end of the lower jaw, and wherein the proximal end of the upper jaw is connected to the proximal end of the lower jaw;
(iii) a knife assembly comprising a knife, a beam, and a firing nut, wherein the beam is coupled to the firing nut;
(iv) a firing lead screw having a threaded portion, wherein a distal end of the firing lead screw is coupled to a bushing, wherein rotation of the firing lead screw in a first direction proximally drives the firing nut along the threaded portion and rotation of the firing lead screw in a second direction distally drives the firing nut along the threaded portion, and wherein the firing lead screw has an unthreaded portion extending between the bushing and the threaded portion; and
(v) a firing screw compression spring extending along the firing lead screw, wherein the firing screw compression spring is positioned between the bushing and the firing nut.