Liquid pressure source unit for liquid-operated booster

Details Liquid pressure source unit for liquid-operated booster Liquid pressure source unit for liquid-operated booster

1993-10-26

1995-01-10

Look, Edward K.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

605471, F16D 3102, B60T 1300

Patent

active

053795938

ABSTRACT:
This invention not only positively reduces the vibrations and noises due to pulsation pressure generated by a hydraulic pressure pump 10, but also effectively prevents the generation of foreign sounds that may occur when a liquid-operated booster 90 is abruptly activated. For this purpose, a throttle valve unit 80 (180, 280) for greatly reducing the flow area until the pressure differential or flow rate reaches a predetermined value is provided between an accumulator 70 for accumulating pressurized liquid and the liquid-operated booster 90 which utilizes the pressurized liquid as an operation source. When the pressure accumulated within the accumulator 70 is at a predetermined value or less, the throttling function of the throttle valve unit 80 (180, 280) is cancelled.

REFERENCES:
patent: 4338855 (1982-07-01), Ideta
patent: 4660381 (1987-04-01), Kuromitu
patent: 4819433 (1989-04-01), Belart
patent: 4850655 (1989-07-01), Takata et al.
patent: 4914917 (1990-04-01), Schonlan
patent: 5020864 (1991-06-01), Tanaka

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