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Filter delivery system

  • US 10,512,531 B2
  • Filed: 06/26/2017
  • Issued: 12/24/2019
  • Est. Priority Date: 11/12/2004
  • Status: Active Grant
First Claim
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1. A filter assembly comprising:

  • a) a filter having a sleeve;

    b) a plurality of legs extending distally from the sleeve and configured to form a filter, wherein each leg has a distally positioned hook configured to engage a vessel inner wall;

    c) a delivery portion that includes a catheter with an outer surface, an inner surface and a lumen having at least one groove at a lumen distal end wherein each groove is configured for holding at least one leg hook and separating said leg hooks for preventing leg entanglement;

    d) said catheter having a distal end portion;

    e) each groove including a longitudinally extending surface positioned in between the catheter inner and outer surfaces and a transverse surface that extends between said longitudinally extending surface and said catheter inner surface; and

    f) wherein each hook engages said transverse surface to prevent inadvertent longitudinal travel of said filter in a proximal direction.

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