Patent ID: 6773236
Filing Date: 2004-08-10
Classification: F04B

Abstract:
A pump apparatus for transferring a liquid, the pump apparatus comprising:(a) an internally pressurized diaphragm assembly disposed atop a pump bowl, when the pump bowl is flooded with a liquid the internally pressurized diaphragm assembly is operably coupled through the liquid to a suction inlet and a discharge outlet; (b) valves disposed within the suction inlet and discharge outlet to restrict movement of the liquid to a single direction; and (c) means for urging reciprocating axial movement of the internally pressurized diaphragm assembly from a first position to a second position wherein when in the first position the diaphragm assembly produces a negative pressure upon the liquid drawing the liquid through the suction inlet and when in the second position the diaphragm assembly produces a positive pressure upon the liquid forcing the liquid into the discharge outlet.