Power plants – Pressure fluid source and motor – Pulsator
Patent
1981-04-09
1984-05-22
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60563, B60T 1320
Patent
active
044493690
ABSTRACT:
The invention provides a power assisted hydraulic control system suitable for actuating clutches and brakes. The system incorporates a master cylinder having a master piston therein defining a control chamber, a hydraulic power assistance unit, and a distributor adapted to connect, by means of a slide valve, the power assistance unit with the hydraulic receiver controlling the brake or clutch unit. The distributor comprises a slide-valve having a plunger one end of which is subjected to the pressure in the control chamber and the other end of which is subjected to the pressure in the receiver.
A bypass channel links the control chamber of the master cylinder to the pipeline connecting the operating port of the distributor to the receiver. The bypass channel has a bypass valve controlled by a spring which opens in the event of failure of the power assistance to permit manual operation by the master piston.
REFERENCES:
patent: 2866317 (1953-12-01), Stelzer
patent: 2913877 (1959-11-01), Stelzer
patent: 2989852 (1961-06-01), Rockwell
patent: 3050944 (1962-08-01), Schwartz
patent: 3163007 (1964-12-01), Scott
patent: 3727986 (1973-04-01), Koivunen
patent: 3729931 (1973-05-01), Shilten
patent: 3789611 (1974-02-01), Marquardt
patent: 3798905 (1974-03-01), Tennis
patent: 4312182 (1982-01-01), Filderman
Hershkovitz Abraham
VALEO Societe Anonyme
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