US 2021/0204940 A1Published application

Knife for surgical stapler and associated method of manufacture with mim and hip

AssigneeEthicon, Inc.

InventorsAnil K. Nalagatla, Frederick E. Shelton, IV, Chester O. Baxter, III, Jerome R. Morgan, Jason L. Harris

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Abstract

A method is used to manufacture a knife of an end effector of a surgical instrument. The method includes forming the knife using metal injection molding. The knife has at least one feature having a molded shape. The method also includes machining the at least one feature of the knife to have a machined shape without machining the entire knife. The method also includes incorporating the knife into the end effector of the surgical instrument.

Claims22

Dependent claims

-18. (canceled)

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 plurality of staples,
(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 outer surface of the anvil pin has a finer surface finish than a remainder of the anvil pin which is configured to reduce 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 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 finer surface finish than a remainder of the anvil pin which is configured to reduce wear associated with slidably interacting with the recess.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/155,824Filed 22 Jan 2021
Priority: 31 Dec 2018
Published: 8 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

A61B 17/072
Surgical staplers , e.g. containing multiple staples or clamps: for applying a row of staples in a single action, e.g. the staples being applied…
A61B 17/07207
For applying a row of staples in a single action, e.g. the staples being applied simultaneously: the staples being applied sequentially
B21K 11/02
Making cutlery wares; Making garden tools or the like: knives
A61B 2017/00526
Surgical instruments, devices or methods: methods of manufacturing

Family

Application16/236,676Division · filed 31 Dec 2018
Application17/155,824Division
US 11,103,245 B2Related patent
US 12,295,572 B2Related patent
US 2020/0205812 A1Published application
US 2021/0204940 A1This patent

From the US filing history. Foreign family members aren’t listed.

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