Patent ID: 6572259
Filing Date: 2003-06-03
Classification: F04B

Abstract:
A slurry dispensing system, comprising:a tank for receipt of the slurry, said tank having an outlet; an agitator associated with said tank for providing agitation to the slurry; a conduit in fluid communication with the outlet of said tank for delivering slurry from said tank; a pump in fluid communication with said conduit; a flexible member in fluid communication with said pump, said flexible member having an interior surface for contact with the slurry passing through and having an exterior surface; a housing in which said flexible member is located, said housing and said flexible member forming a chamber for the receipt of a gas for applying a pressure upon the exterior surface of said flexible member; and said flexible member disposed between an inlet and an outlet of said housing with a generally uniform cross-sectional shape in a discharge mode of said pump, said flexible member collapsible on itself along at least a portion thereof during a suction mode of said pump to stop flow in a reverse direction and prevent siphoning backflow of the slurry through said flexible member.