Surgical cutting instrument with movable, inner and outer tubular members

  • US 5,269,798 A
  • Filed: 02/19/1992
  • Issued: 12/14/1993
  • Est. Priority Date: 02/19/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A surgical cutting instrument comprisingan elongate outer tubular member having a distal end, an inner diameter and an opening at said distal end for receiving anatomical tissue;

  • an elongate inner tubular member disposed within said outer tubular member and having a distal end, an outer diameter and a cutting surface at said distal end for cooperating with said opening to cut tissue, at least said inner member distal end including said cutting surface being made from gall-resistant material in its entirety;

    a bearing layer on said inner member extending from said gall-resistant material toward said proximal end; and

    means for mounting said inner and outer tubular members for relative movement to position said cutting surface to engage tissue through said opening, said gall-resistant material and said bearing layer together forming a bearing surface along substantially the entire length of the surgical cutting instrument to permit said inner diameter to be substantially the same as said outer diameter.

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