Variable displacement hydraulic pump with quiet timing

Details Variable displacement hydraulic pump with quiet timing Variable displacement hydraulic pump with quiet timing

1992-02-11

1993-07-27

Bertsch, Richard A.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

91 65, 91485, F01B 300

Patent

active

052302741

ABSTRACT:
A fluid pressure energy translating device of the rotary, variable displacement type having a timing device providing gradual rise and reduction of pressure between the cylinder bores and the inlet and outlet ports. The timing device is in the form of a valve plate having a metering groove with a double notch design which exits into an associated outlet port, and a long single "V" notch metering groove which exits into a associated inlet port.

REFERENCES:
patent: 3585901 (1971-06-01), Moon, Jr.
patent: 4920856 (1990-05-01), Berthold et al.

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