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Intercranial pressure regulator valve

  • US 4,769,002 A
  • Filed: 02/28/1986
  • Issued: 09/06/1988
  • Est. Priority Date: 02/17/1983
  • Status: Expired due to Term
First Claim
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1. A valve for regulating the flow of fluid from one location in the body to another location, comprising:

  • a bio-compatible housing;

    a flexible bio-compatible diaphragm dividing theinterior of said housing into first and second interior chambers;

    inlet port means for establishing fluid communication between said first interior chamber and the one location;

    output port means for establishing fluid communication between said second interior chamber and the other locatin;

    a bio-compatible valve seat member carried on said diaphragm for movement therewith, said valve seat defining a fluid passageway opening from said first interior chamber to said second interior chamber and having a first valving surface concentrically oriented with respect to the axis of said fluid passageway, said valve seat and diaphragm having a static position within said housing in the absence of a pressure differential between said chambers;

    means comprising a bio-compatible valve closure member in said first interior chamber axially aligned with said fluid passageway, said valve closure member having a second valving surface concentrically oriented with respect to the axis of said fluid passageway, said second valving surface coacting with said first valving surface to form a constricting portion within said passageway between said first and second chambers whcn said valve seat is in said static position to at least partially close said fluid passageway; and

    said diaphragm being displaceable from said static position in a direction to move said valve seat member along said axis of said fluidpassageway and away from said valve closure member in response to a predetermined minimum threshold pressure differential between said first interior chamber and said second interior chamber to at least partially open said fluid passageway to increase fluid flow between said first and second interior chambers to maintain said pressure differential.

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