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One-way flex valve

  • US 4,222,407 A
  • Filed: 09/13/1978
  • Issued: 09/16/1980
  • Est. Priority Date: 09/13/1978
  • Status: Expired due to Term
First Claim
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1. A check valve which comprises:

  • a cap;

    an inlet port extending from said cap, said inlet port defining a bore which extends through said inlet port;

    a body defining an internal opening and in peripheral engagement with said cap;

    an outlet port extending from said body and defining a bore which extends through said outlet port;

    a rib carried by said body and extending across said opening; and

    a flexible diaphragm located within said opening and supported and urged against the cap by said rib substantially along the entire length of the rib, said diaphragm being engaged against the cap to close the valve with the peripheral edges of the diaphragm being adapted to bend away from the cap to open the valve when a predetermined fluid pressure differential exists between the inlet port and the outlet port;

    said inlet port having an area less than 36 percent of the area of said flexible diaphragm, whereby said diaphragm is prevented from being pushed into said inlet port as a result of back pressure.

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