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Opening mechanism for umbrella-like intravascular shunt defect closure device

  • US 4,007,743 A
  • Filed: 10/20/1975
  • Issued: 02/15/1977
  • Est. Priority Date: 10/20/1975
  • Status: Expired due to Term
First Claim
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1. In an umbrella-like expansive device for closing intravascular shunt defects and the like, said device having a central hub, a plurality of struts movably mounted on the hub and movable between a first, collapsed position in which the struts extend generally parallel to the axis of the hub and a second, expanded position in which the struts extend generally radially from the hub, and closure material extending between the struts and secured thereto, an improved expansion means for moving the struts from the first position to the second position comprising a foldable, resilient strip extending between each pair of adjacent struts and secured thereto, each strip being folded between the struts when the struts are in the first position, whereby the folded resilient strips bias the struts from the first position toward the second position.

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