Pulsation dampener and flow check apparatus

Claim 1

In combination, a pulsation dampener and directional flow check apparatus for connection in-line with a fluid directing conduit, comprising; a valve having two ends each having means for connecting said valve in-line with a conduit, said valve having means for providing a flow path for a fluid through one said end and out the other said end of said valve, said flow path including an area whereat all of the fluid passing through said valve must pass between a stationary surface and an interior surface of an elastic member, a liquid filled area within said valve and isolated from said flow path, said liquid filled area in communication with an exterior surface of said elastic member, a first conduit means in open communication with said liquid filled area, said first conduit means filled with a liquid which is in communication with the liquid of said liquid filled area, a pressure vessel having a flexible diaphragm affixed therein, said flexible diaphragm dividing an interior cavity of said pressure vessel into a first chamber and a second chamber, said first conduit means connected in open communication with said first chamber, said first chamber filled with liquid which is in communication with the liquid of said first conduit means, a second conduit means in open communication with said second chamber of said pressure vessel, said second conduit means further in open communication with a downstream side of said flow path through said valve, said pressure vessel further including a compression spring biasing means positioned at least in part within said second chamber, said compression spring biasing means providing pressure against said flexible diaphragm, said pressure provided by said compression spring biasing means pressing said diaphragm toward said first chamber of said pressure vessel, means providing for selective adjustment of said pressure applied to said flexible diaphragm by said compression spring biasing means.