Patent ID: 7044164

Claim:
A pressure relief valve for venting air from a first side of said valve to a second side of said valve and for blocking flow of air from the second side of said valve to the first side of said valve, said valve comprising: a housing having a base portion defining an air flow passage; and a flap positioned to overlie said air flow passage, at least a portion of said flap being movable relative to said base portion of said housing in response to an air pressure differential acting on a first surface of said flap and a second opposite surface of said flap, said at least a portion of said flap being movable between an open condition for venting air from the first side of said valve to the second side of said valve and a closed condition for blocking flow of air from the second side of said valve to the first side of said valve; said flap having a plurality of mounting openings, said mounting openings each defining an elongated slot, said slots each defining a longitudinal axis extending parallel to both said first surface of said flap and said second surface of said flap, said housing having a plurality of generally T-shaped mounting posts projecting from said base portion of said housing, said mounting posts each having a planar configuration defined by a first planar surface and an opposite second planar surface, said first and second planar surfaces extending away from said housing through said flap, said first and second planar surfaces of each mounting post extending perpendicularly to said longitudinal axis defined by each said mounting opening, said flap having portions adjacent said openings that cooperate with said mounting posts to provide a snap connection between said flap and said mounting posts to secure said flap to said housing with said mounting posts extending through said openings; said mounting posts being the only structure holding said flap on said housing.