Circular stapler with automatic locking mechanism

US8567655B2 · kind B2 · utility

Assignee

• Ethicon Endo-Surgery, Inc. · US

Inventors

• Anil K. Nalagatla · Mason, US
• Barry T. Jamison · Lancaster, US
• David A. Deupree · Mason, US
• Debasish Pradhan · Sambalpur, IN
• Pathik Aguan · Sherghati, IN
• Shrikant Udayrao Puranik · Dhule, IN

Key dates

• Filing date: May 19, 2011
• Grant date: Oct 29, 2013
• Expiry date: Sep 16, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/4984
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A circular stapling instrument includes a casing, an anvil assembly, a staple driver, and a locking mechanism. The anvil assembly is configured to move back and forth between an open position away from the casing and a closed position adjacent the casing. The staple driver is configured to move within the casing from a pre-fired position to a fired position. The locking mechanism is configured to, whenever the anvil assembly is in the open position, automatically lock the staple driver in the pre-fired position preventing the staple driver from being moved to the fired position. The locking mechanism is also configured to, whenever the anvil assembly is in the closed position, automatically unlock the staple driver from the pre-fired position to allow the staple driver to be moved to the fired position.