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Trocar seal system

  • US 6,482,181 B1
  • Filed: 11/24/1999
  • Issued: 11/19/2002
  • Est. Priority Date: 05/28/1997
  • Status: Expired due to Term
First Claim
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1. A seal trocar assembly comprising:

  • a housing including an upper housing member and a lower housing member, each of the housing members defining a throughbore, the upper housing member throughbore and the lower housing member throughbore defining an opening dimensioned to allow passage of an elongated surgical instrument;

    a seal member having a circular body defining a central aperture and an annular sealing flange, the seal member being positioned within a cavity defined between the upper and lower housing members such that the sealing flange of the seal member engages a bottom surface of the upper housing member, the circular body of the seal member including at least one layer of fabric;

    a two part ring assembly including upper and lower ring members, each ring member including engaging structure configured to lockingly engage with respective structure formed on the other ring member, the seal member being supported between the upper and lower ring members;

    a seal clamp defining a throughbore and including a plurality of projecting posts configured to be received within openings formed in the lower housing member, the seal clamp having a first end positioned adjacent an inner wall of the upper housing member and a second end;

    an O-ring positioned between the first end of the seal clamp and the inner wall of the upper housing member; and

    a lower seal supported between the second end of the seal clamp and the lower housing member.

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