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Trocar with overlapping seal elements

  • US 5,385,552 A
  • Filed: 03/11/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 03/11/1993
  • Status: Expired due to Fees
First Claim
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1. A medical device, designed for minimally invasive surgical procedures on a patient, comprising:

  • a body having proximal and distal ends and a hollow interior defining a path between the proximal and distal ends;

    an object sized to pass along the path; and

    a seal mounted within the body and fluidly sealing the path with and without the object directed along the path and into the hollow interior, the seal including;

    four overlapping elastomeric sealing elements stacked on top of one another in an interleavened manner so that a portion of each said sealing element overlaps an adjacent sealing element and is overlapped by another adjacent sealing element, each of said sealing elements having a distal edge extending across the path, the distal edges being arranged at 90°

    intervals so that first and second of said distal edges are parallel and third and fourth of said distal edges are perpendicular to said first and second distal edges, the sealing elements crossing at a common location so to fluidly seal the path when an object is not positioned along the path, said sealing elements configured to permit the object to pass therethrough in a distal direction towards the patient.

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