Patent ID: 6681571
Filing Date: 2004-01-27
Classification: F04B,F16H

Abstract:
A variable displacement fluid translating device, comprising:a housing having first and second inlet/outlet ports and defining a reference axis therethrough; a rotating cam disposed in the housing along the reference axis and having a cam surface; a plurality of piston bores defined in the housing about the reference axis and each bore of the plurality of piston bores having a bottom portion; a plurality of pistons slideably disposed in the plurality of piston bores and selectively in mating contact with the cam surface of the rotating cam; a plurality of pressure chambers defined in the housing between the respective one of the plurality of pistons and the bottom portion of the respective ones of the plurality of piston bores; and a valving arrangement connected between selected pressure chambers of the plurality of pressure chambers and the respective first and second inlet/outlet ports and being operative to selectively control displacement and the direction of pressurized fluid flow in each pressure chamber relative to the first and second inlet/outlet ports.