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Lockout mechanism for surgical apparatus

  • US 5,472,132 A
  • Filed: 12/06/1994
  • Issued: 12/05/1995
  • Est. Priority Date: 10/18/1991
  • Status: Expired due to Term
First Claim
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1. A surgical apparatus for approximating surgical jaw structure comprising:

  • a) a handle;

    b) an elongated portion defining a longitudinal axis and extending distally from said handle;

    c) first jaw means mounted to said elongated portion and having a first tissue engaging surface for supporting tissue, said first jaw means comprising a cartridge holding a plurality of ejectable surgical fasteners and a cam bar adapter removably mounting means for ejecting said surgical fasteners from said cartridge;

    d) second jaw means, mounted to said elongated portion, having a second tissue engaging surface and a distal end and a proximal end, said second jaw means being mounted with respect to said elongated housing such that at least the distal end of said second jaw means is movable in directions generally transverse to said longitudinal axis between an open position spaced from said first tissue engaging surface and a closed position wherein said second tissue engaging surface is in close cooperative alignment with said first tissue engaging surface;

    e) means associated with said elongated portion for moving said second jaw means between said open position and said closed position comprising a camming member axially movable with respect to said second jaw means, said camming member being movable between a first position and a second position, said camming member cooperating with said second jaw means such that when said camming member is moved from said first position to said second position, said second jaw means is urged to said closed position;

    f) lockout means associated with said elongated portion for arresting movement of said means for moving said second jaw means between said open position and said closed position, said lockout means comprising pawl member mounted with respect to said elongated portion; and

    g) means for actuating said means for ejecting said surgical fasteners;

    wherein said actuating means urges said pawl into engagement with said camming member when said cam bar adapter is located distally from a proximal-most end of said cartridge and said camming member is in said first position to arrest movement of said camming member.

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