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IVC filter with translating hooks

  • US 9,204,956 B2
  • Filed: 08/13/2012
  • Issued: 12/08/2015
  • Est. Priority Date: 02/20/2002
  • Status: Expired due to Term
First Claim
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1. A filter with an assembly comprising:

  • a hub;

    andhollow, kite-shaped arms comprising;

    a three- or four-sided inner leaf comprising two wire-arm segments with first segment ends connected to the hub;

    a triangular outer leaf comprising two wire-arm segments with first segment ends connected together forming an outer leaf vertex with a tip;

    wherein the second, inner-leaf segment ends connect to the second, outer-leaf segment ends to form two joining vertices between the leaves with the bases of the leaves formed from a line connecting the joined vertices, but not containing a wire;

    anda hook having two members wherein the members connect at first ends into a tip,andconnect at second ends to the wire segments adjacent a joining vertex or an outer leaf vertex and near to and bridging the vertexandwhereinthe filter has two states a retracted state having a first diameter and length and an expanded state having a second diameter larger than the first diameterandhook bias causes the hook tip to point inward in the retracted state and causes the hook tip to rotate outward in the expanded state.

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