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Displacement-activated medical check valve

  • US 5,697,915 A
  • Filed: 05/30/1996
  • Issued: 12/16/1997
  • Est. Priority Date: 02/15/1994
  • Status: Expired due to Term
First Claim
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1. A displacement-activated medical check valve for selectively opening and closing medicinal fluid communication, the check valve comprising:

  • a. a flexible elastomeric member having a proximal end and a distal end and further having a sealed perforation at least partially through said member;

    b. a housing defining a bore for receiving said member, said bore having a longitudinal axis, said member being sized such that at least a portion of said elastomeric member is displaceable along the longitudinal axis of said bore;

    c. a contact member sized and configured for engaging said distal end of said elastomeric member when at least a portion of said elastomeric member is displaced against said contact member;

    d. said elastomeric member and said sealed perforation being sized and configured such that said perforation is shortened and thereby compressed open when said elastomeric member is compressed against said contact member, said elastomeric member rebounding to close said perforation when said elastomeric member is free from compressive force so that fluid may flow through said perforation when said elastomeric member is compressed but fluid is prevented from flowing through said perforation when said elastomeric member is free from compressive force.

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