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Heart valve

  • US 4,491,986 A
  • Filed: 10/13/1977
  • Issued: 01/08/1985
  • Est. Priority Date: 05/12/1976
  • Status: Expired due to Term
First Claim
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1. A prosthetic heart valve, comprising:

  • (a) a supporting structure comprising a base ring having two upwardly projecting and diverging struts, said base ring including a first ring portion which is formed from semirigid, flexible material and a second ring portion which is formed from soft flexible material;

    (b) a membrane forming lips which surround said base ring and struts to form a tubular opening with an exit end and an entrance end which are substantially of equal area; and

    (c) said lips being formed to close in an overlapping manner.

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