Surgical stapler with rotary cam drive

US10786249B2 · kind B2 · utility

Assignee

• Ethicon, Inc. · US

Inventors

• Richard L. Leimbach · Cincinnati, US
• Richard F. Schwemberger · Cincinnati, US
• John P. Measamer · Cincinnati, US
• Johnny H. Alexander, III · Sharonville, US
• Christopher C. Miller · Loveland, US
• Brian F. DiNardo · Cincinnati, US
• Jason M. Rector · Maineville, US

Key dates

• Filing date: Jun 26, 2017
• Grant date: Sep 29, 2020
• Expiry date: Mar 28, 2038

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2017/00398
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A surgical circular stapler has a handle assembly, a shaft, a stapling assembly, a motor, a drive assembly, and a firing assembly. The shaft extends distally from the handle assembly. The stapling assembly is secured to a distal end of the shaft. Longitudinal translation of the firing assembly causes the stapling assembly to drive a plurality of staples in a circular array to secure two lumens of tissue together. The stapling assembly may further drive a blade to sever any excess tissue interior of the circular array of staples. The motor is operable to rotate the drive assembly to thereby translate the firing assembly. A resilient member biases the firing assembly proximally. Through cooperation between the firing assembly and the resilient member, the firing assembly is driven distally and proximally to complete a firing stroke in response to rotation of the drive assembly through a single revolution.