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Biopsy device with variable speed cutter advance

  • US 7,645,240 B2
  • Filed: 02/13/2006
  • Issued: 01/12/2010
  • Est. Priority Date: 02/25/2003
  • Status: Active Grant
First Claim
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1. A handheld biopsy device comprising:

  • an outer cannula for receiving tissue;

    a hollow cutter coaxial with the outer cannula;

    the hollow cutter supported for translation and rotation with respect to the outer cannula;

    a first rotationally driven member, the first rotationally driven member adapted to provide variable speed translation of the cutter without variation of the rotational speed of the first rotationally driven member, wherein the first rotationally driven member comprises a threaded feature having at least one no pitch zone, wherein the at least one no pitch zone of the threaded feature permits rotation of the rotationally driven member without translation of the cutter; and

    a second rotationally driven member for providing rotation of the cutter.

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