Hydraulic pressure source device for hydraulic boosters

Details Hydraulic pressure source device for hydraulic boosters Hydraulic pressure source device for hydraulic boosters

1986-12-23

1988-06-14

Cohan, Alan

Power plants

Pressure fluid source and motor

Pulsator

303114, 303 962, B60T 1310

Patent

active

047503297

ABSTRACT:
A hydraulic pressure source device for hydraulic boosters, comprising a hydraulic pump connected via a high-pressure oil passage to an input port of a hydraulic booster and a proportional reducing valve serving as a regulator interposed in the high-pressure oil passage, wherein the proportional reducing valve acts to reduce the pressure above a set level fed from the pump at certain reduction ratio and transmit it to the booster, the valve having a piston which is retractable beyond a valve-closing position to enlarge the volume of an output hydraulic chamber of the valve. Such retracting motion of the valve piston attenuates any impact which may be caused by kickback phenomenon occurring during operation of the booster.

REFERENCES:
patent: 4641894 (1987-02-01), Belart
patent: 4669788 (1987-06-01), Farr

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