System and method for pump variable stroke

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Date

2013-02-26

Authors

Richard W. Smalling
Jeffrey R. Gohean
Thomas D. Pate
Raul G. Longoria

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Publisher

United States Patent and Trademark Office

Abstract

Systems and methods for providing a variable pumping stroke from a pump comprising a pumping chamber, a pump inlet, a pump outlet, a valving mechanism, and a drive piston. In one embodiment, the pump inlet is in fluid communication with the pumping chamber regardless of the location of the drive piston within the pumping chamber, and the pump outlet is similarly in fluid communication with the pumping chamber regardless of the location of the drive piston within the pumping chamber.

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