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One way flow device

  • US 5,144,986 A
  • Filed: 03/27/1991
  • Issued: 09/08/1992
  • Est. Priority Date: 03/27/1991
  • Status: Expired due to Fees
First Claim
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1. A one-way fluid flow device, comprising:

  • first and second flexible sheets attached together at portions thereof to form a conduit;

    a diaphragm which flexes responsive to differential pressure thereacross, the diaphragm having an upstream and a downstream side; and

    at least one orifice in said diaphragm positioned so that it is urged against said first sheet when the pressure on said downstream side is greater than the pressure on said upstream side.

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