Locking mechanism for surgical fastening apparatus
First Claim
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1. A surgical fastening apparatus comprising:
- a cartridge frame;
a cartridge mounted to said cartridge frame, said cartridge having a plurality of fastening elements abutting fastening element drive members arranged longitudinally therein;
a pusher assembly slidably mounted on said cartridge frame for actuating the surgical stapling apparatus, said pusher assembly having at least one cam bar longitudinally movable through said cartridge for sequentially engaging said fastening element drive members to urge said drive members in a direction substantially perpendicular to the direction of movement of said at least one cam bar, and a cam bar retainer for mounting said at least one cam bar; and
locking mechanism means engageable with said cam bar retainer for preventing reactuation of the surgical stapling apparatus.
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Abstract
An improved surgical stapling apparatus containing a locking mechanism to prevent reactuation of the apparatus, the locking mechanism comprising a resilient clip having a hook which is engagable with a locking notch on the cam bar retainer. The resilient clip is initially held in a non-engagable position by means of a movable chock. When the stapler is actuated for the first time, the cam bar retainer pushes the chock into a subsequent position where the chock no longer blocks the resilient clip. The resilient clip then moves to a position where the hook is engagable with the locking notch. Once the cam bar retainer is retracted it can no longer be reactuated.
1737 Citations
38 Claims
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1. A surgical fastening apparatus comprising:
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a cartridge frame; a cartridge mounted to said cartridge frame, said cartridge having a plurality of fastening elements abutting fastening element drive members arranged longitudinally therein; a pusher assembly slidably mounted on said cartridge frame for actuating the surgical stapling apparatus, said pusher assembly having at least one cam bar longitudinally movable through said cartridge for sequentially engaging said fastening element drive members to urge said drive members in a direction substantially perpendicular to the direction of movement of said at least one cam bar, and a cam bar retainer for mounting said at least one cam bar; and locking mechanism means engageable with said cam bar retainer for preventing reactuation of the surgical stapling apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A surgical fastening apparatus comprising:
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a cartridge frame; a replaceable cartridge receivable into said cartridge frame, said cartridge having a plurality of fastening elements abutting fastening element drive members arranged longitudinally therein, a pusher assembly slidably mounted on said cartridge frame for actuating the surgical stapling apparatus, said pusher assembly having at least one cam bar longitudinally movable through said replaceable cartridge for sequentially engaging said fastening element drive members to urge said drive members in a direction substantially perpendicular to the direction of movement of said at least one cam bar, and a cam bar retainer for mounting said at least one cam bar; and locking mechanism means engageable with said cam bar retainer for preventing reactuation of the surgical stapling apparatus. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification