Surgical stapler with locking means

• US 5,065,929 A
• Filed: 04/01/1991
• Issued: 11/19/1991
• Est. Priority Date: 04/01/1991
• Status: Expired due to Term

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Mereness, W. Michael, Schulze, Dale R., Sherman, Jon A.
• Primary Examiner(s): Rosenbaum, Mark
• Assistant Examiner(s): SCHROCK, ALLAN
• Application Number:
  US07/678,919
• Time in Patent Office: 232 Days
• Field of Search: 227/175, 227/176, 227/180, 227/181, 227/182, 227/19, 227/120, 227/135, 227/901
• US Class Current: 227/19
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/07214 Stapler heads

Abstract

The present invention relates to an improved two-piece surgical stapler having first and second mated pieces, and including a first and a second locking means that insure that the two pieces are mated when staples are being ejected.

Claims

1. A surgical stapler divided longitudinally into first and second mated pieces and having a staple ejecting end and an opposite end, said stapler comprising:

a longitudinal inner passage;

a staple ejecting means slidably affixed to said first piece and adapted to move longitudinally within said passage toward the staple ejecting end to eject staples therefrom;

said staple ejecting means being integral with a gripping means projecting out of said first piece for gripping and moving said ejecting means within said passage;

said gripping means provided with a first locking means;

said second piece provided with a second locking means;

said first locking means adapted to engage said second locking means when said ejecting means is moved within said passage toward said ejecting end;

whereby when said staple ejecting means is moved toward said ejecting end to eject staples, said first locking means engages said second locking means and insures that said pieces are mated when staples are being ejected.

2. The surgical stapler according to claim 1 wherein said second locking means is a ridge extending parallel to said ejecting end of the inner Passage that is affixed to the external surface of said second piece and said first locking means is a groove aligned with said ridge.

3. The surgical stapler according to claim 1 wherein said second locking means is a plurality of spaced, aligned ridges extending parallel to said inner passage and said first locking means is a groove aligned with said ridges, said ridges being spaced such that the distance between each pair of said ridges is less than the length of said groove.