US 12,295,572 B2
Knife for surgical stapler and associated method of manufacture with MIM and HIP
Anil K. Nalagatla, Mason, OH (US); Frederick E. Shelton, IV, Hillsboro, OH (US); Chester O. Baxter, III, Loveland, OH (US); Jerome R. Morgan, Cincinnati, OH (US); and Jason L. Harris, Lebanon, OH (US)
Assigned to Cilag GmbH International, Zug (CH)
Filed by Cilag GmbH International, Zug (CH)
Filed on Jan. 22, 2021, as Appl. No. 17/155,824.
Application 17/155,824 is a division of application No. 16/236,676, filed on Dec. 31, 2018, granted, now 11,103,245.
Prior Publication US 2021/0204940 A1, Jul. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/072 (2006.01); B21K 11/02 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/072 (2013.01) [B21K 11/02 (2013.01); A61B 2017/00526 (2013.01); A61B 2017/07257 (2013.01); A61B 2017/07264 (2013.01); A61B 2017/07271 (2013.01); A61B 2017/07278 (2013.01); A61B 2017/07285 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An instrument, comprising:
(a) a shaft extending distally along a longitudinal axis; and
(b) an end effector in communication with the shaft, wherein the end effector is operable to compress, staple, and cut tissue, wherein the end effector comprises:
(i) a first jaw including a recess configured to receive a staple cartridge,
(ii) a second jaw including an anvil, and
(iii) a knife, wherein the knife comprises:
(A) a cutting edge including first and second opposing sides,
(B) an anvil pin configured to move within a recess of the anvil, wherein the anvil pin includes inner and outer surfaces, wherein the inner surface of the anvil pin is disposed closer to the cutting edge than the outer surface of the anvil pin, wherein at least the inner surface of the anvil pin has a machined surface finish that is finer than a remainder of the anvil pin which is configured to tighten dimensional tolerances and minimize wear associated with slidably interacting with the anvil, and
(C) a channel pin configured to move within the recess of the first jaw, wherein the channel pin includes inner and outer surfaces, wherein the inner surface of the channel pin includes a pair of raised surface portions and a recessed surface portion positioned between the raised surface portions, wherein the inner surface of the channel pin is disposed closer to the cutting edge than the outer surface of the channel pin, wherein at least one of the inner or outer surfaces of the channel pin has a machined surface finish that is finer than a remainder of the channel pin which is configured to tighten dimensional tolerances and minimize wear associated with slidably interacting with the recess of the first jaw.