Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Three or more cylinders arranged in parallel – radial or...
Patent
1987-04-29
1988-07-19
Freeh, William L.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Three or more cylinders arranged in parallel, radial or...
91506, F01B 1300, F01B 1304
Patent
active
047577436
ABSTRACT:
A rotary hydraulic machine which includes a housing having a shaft mounted for rotation within the housing about a shaft axis. A cylinder block is coupled to the shaft for corotation with the shaft within the housing and includes a plurality of cylinders disposed in a circumferential array parallel to and surrounding the shaft axis. A piston is disposed to reciprocate within each of the cylinders and is coupled to a yoke for determining displacement of the pistons within the cylinders. A valve plate is affixed within the housing and includes arcuate slots at a radius from the axis of rotation corresponding to that of the cylinders. The slots respectively connect cylinders to the machine inlet and outlet ports as the cylinders register with the slots. In accordance with a distinguishing feature which characterizes one aspect of the present invention, the valve plate also includes first and second pressure valves respectively mounted on the plate adjacent to leading edges of the arcuate slots (with respect to the direction of cylinder rotation) and responsive to fluid pressure for porting the cylinders to the adjacent slots and thereby, in effect, extending the arcuate dimension of the slots and altering machine timing as a function of fluid pressure.
REFERENCES:
patent: 2963983 (1960-12-01), Wiggermann
patent: 3157130 (1964-11-01), Cardiou
patent: 3199461 (1965-08-01), Wolf
patent: 3858483 (1975-01-01), Hein
patent: 3956969 (1976-05-01), Hein
patent: 4048903 (1977-09-01), Roberts
patent: 4175472 (1979-11-01), Roberts
Freeh William L.
Vickers Incorporated
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