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Surgical instrument

  • US 5,611,813 A
  • Filed: 04/28/1995
  • Issued: 03/18/1997
  • Est. Priority Date: 04/15/1992
  • Status: Expired due to Fees
First Claim
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1. A surgical instrument for performing electrosurgery comprising:

  • a handle housing with a first handle member affixed thereto, and at least first and second concentrically arranged shafts extending longitudinally away from said housing, said second shaft having proximal and distal ends and being affixed to said housing at its proximal end so as to be immobile with respect to said housing, and said first shaft surrounding said second shaft and being arranged to translate longitudinally with respect to said second shaft;

    a jaw unit carried by said distal end of said second shaft, said jaw unit comprising at least two jaws, a rear section, and intermediate leaf spring elements connecting each of said jaws to said rear section, said leaf spring elements biasing said jaws so that when said leaf spring elements are unrestrained, said jaws are deployed in angular spaced relation with one another;

    said first shaft having a length such that when said first shaft is caused to translate towards the distal end of said second shaft, the distal end of said first shaft will slide over said jaw unit and mechanically cause said jaws to close towards one another;

    translation means for causing said first shaft to translate longitudinally relative to said second shaft, said translation means comprising a second handle member mounted for pivotal movement relative to said first handle member, and means coupling said second handle member and said first shaft for causing reciprocal movement of said first shaft relative to said second shaft as said second handle member is pivoted relative to said first handle member, whereby to cause said first shaft to move into and out of jaw-closing relation with said jaws; and

    electrically-conductive means carried in part by said handle housing for applying an electrical potential to said jaws, whereby an electrical current will flow in tissue engaged by said jaws.

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