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Apparatus and method for placing staples in laparoscopic or endoscopic procedures

  • US 5,318,221 A
  • Filed: 09/10/1992
  • Issued: 06/07/1994
  • Est. Priority Date: 05/26/1989
  • Status: Expired due to Term
First Claim
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1. A surgical apparatus for driving surgical fasteners into body tissue comprising:

  • a) a frame;

    b) an endoscopic portion defining a longitudinal axis and extending distally from said frame, said endoscopic portion including;

    i) an elongated support having a distal member for receiving a cartridge assembly, the cartridge assembly having a distal end and a proximal end and including a plurality of surgical fasteners slidably mounted therein, and having a tissue engaging surface;

    ii) a jaw member having a distal end and a proximal end, said proximal end of said jaw member being pivotally retained in said elongated support such that the jaw member is movable between an open position and a closed position in close cooperative alignment with the tissue engaging surface of the cartridge assembly and said distal end of said jaw member is in alignment with said distal end of said cartridge assembly;

    iii) means for moving the jaw member between the open position and the closed position including an arcuate camming surface having a defined radius of curvature on the jaw member and a collar tube disposed around at least a portion of the elongated support and the jaw member, said collar tube having a distal camming surface with a radius of curvature which is shorter than the radius of curvature of the jaw member and further being movable between a first position in which the distal camming surface is located proximally to the proximal end of the jaw camming surface and a second position in which the distal camming surface is located distally to the proximal end of the jaw camming surface, the distal camming surface cooperating with the jaw camming surface such that when the collar is moved from the first position to the second position, the jaw member is urged to the closed position;

    iv) means for ejecting the surgical fasteners from the cartridge assembly through tissue; and

    c) gas seal means for sealing said endoscopic portion to obstruct the passage of gaseous media therethrough.

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