• US 20030084902A1
  • Filed: 05/11/1994
  • Published: 05/08/2003
  • Est. Priority Date: 05/29/1992
  • Status: Active Grant
First Claim
Patent Images

1. A unidirectional fluid valve that comprises:

  • a flexible flap having a first portion and a second portion, the first portion being attached to a valve seat, the valve seat having orifice and a seal ridge that has a concave curvature when viewed from a side elevation, the flexible flap making contact with the concave curvature the seal ridge when a fluid is not passing through the orifice, the second portion of the flexible flap being free to be lifted from the seal ridge when fluid is passing through the orifice, wherein the concave curvature of the seal ridge corresponds to a deformation curve exhibited by the second portion of the flexible flap when exposed to a uniform force, a force having a magnitude equal to a mass of the second portion of the flexible flap multiplies by at least one gravitational unit of acceleration, or a combination thereof.

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