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Surgical stapler with lockout mechanism

  • US 5,715,988 A
  • Filed: 08/14/1995
  • Issued: 02/10/1998
  • Est. Priority Date: 08/14/1995
  • Status: Expired due to Term
First Claim
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1. A surgical apparatus comprising:

  • a) a cartridge supporting portion having a cartridge disposed therein which contains a plurality of surgical fasteners and a plurality of pushers configured to eject the surgical fasteners from the cartridge;

    b) an anvil supporting portion having an anvil surface against which the surgical fasteners are driven when they are ejected from the cartridge;

    c) a cam bar retainer operatively associated with the cartridge and retaining at least two cam bars configured to sequentially interact with the pushers as the cam bar retainer translates in a distal direction from a pre-fired proximal position;

    d) a retaining member disposed within the cartridge supporting portion and configured in a first position to engage a cavity defined in a proximal end of the cam bar retainer when the cam bar retainer is in the pre-fired proximal position, the retaining member movable to a second position out of engagement with the cavity when the cam bar retainer is advanced from the pre-fired proximal position; and

    e) a locking member supported on the cam bar retainer and configured to engage an aperture provided within the cartridge supporting portion upon retracting the cam bar retainer to a post-fired proximal position.

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