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Universal seal for a trocar

  • US 5,792,113 A
  • Filed: 12/12/1996
  • Issued: 08/11/1998
  • Est. Priority Date: 12/12/1996
  • Status: Expired due to Term
First Claim
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1. A universal seal for a trocar comprising:

  • a) a rigid housing adapted to be mounted onto a cannula of said trocar, said housing having a longitudinal axis and a chamber therein for receiving a sealing assembly, and said housing having a top face and a bottom face, wherein each of said faces has an opening therein for providing a pathway through said housing into said cannula; and

    b) a sealing assembly disposed within said chamber of said rigid housing, said sealing assembly movable along the longitudinal axis of said housing in response to a surgical instrument being inserted into or withdrawn from said sealing assembly;

    said sealing assembly including;

    i) first and second rigid rings generally parallel to and spaced longitudinally from each other;

    ii) an inner elastomeric seal located in the pathway through said housing for sealing against said surgical instrument of varying diameter, said elastomeric seal attached to said second ring and spaced longitudinally from said first ring, and said elastomeric seal having an aperture therein for passage of said instrument through said elastomeric seal; and

    iii) an outer seal attached to said first rigid ring and spaced longitudinally from said inner elastomeric seal and located peripherally of the pathway of said housing for minimizing the escape of insufflation gases from a surgical site through said chamber of said housing.

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