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Sealing means for endoscopic surgical anastomosis stapling instrument

  • US 5,333,773 A
  • Filed: 11/16/1992
  • Issued: 08/02/1994
  • Est. Priority Date: 08/23/1991
  • Status: Expired due to Term
First Claim
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1. A surgical stapling instrument for applying one or more surgical staples to tissue, comprising:

  • a stapling head assembly including a staple holder for receiving one or more surgical staples, an anvil for clamping the tissue against said staple holder, and driver means for driving the staples from said staple holder;

    an actuator handle assembly for actuating said staple driver;

    a shaft assembly with a generally hollow interior and including a support shaft for mounting said stapling head assembly on said actuator handle assembly;

    a tension member contained within said support shaft for transmitting tension from said actuator handle assembly to said anvil to resist the forces exerted on said anvil when the staples are formed;

    a compression member contained within said support shaft for transmitting a compressive force from said actuator handle assembly to advance said staple driver to drive the staples from said staple holder into the tissue and to form the staples against said anvil;

    wherein said shaft assembly has an elastomeric seal contained within said hollow interior, said seal placed around said tension and compression members; and

    a hollow connector extending from said actuator handle assembly;

    a ferrule overlapping said shaft assembly and said connector;

    said ferrule being compressed radially inward over said shaft assembly and said connector; and

    an o-ring placed between said ferrule and said shaft assembly.

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