Power plants – Pressure fluid source and motor – Pulsator
Patent
1979-10-01
1982-01-19
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60568, 60582, 60589, B60T 1120
Patent
active
043110070
ABSTRACT:
A master cylinder provides a housing defining a reservoir and movably carrying a pair of pistons within a bore in communication with the reservoir. The pair of pistons cooperate with the housing to substantially define a pair of pressure chambers which communicate with respective brake circuits. One of the pistons forms a cavity to receive a reaction piston and the one piston also carries a proportioning valve. The reaction piston forms an auxiliary chamber within the one piston and the proportioning valve is exposed to the auxiliary chamber. The reaction piston extends outwardly into one of the pressure chambers to engage the housing and the valve member is responsive to the fluid pressure in the other pressure chamber to control fluid communication between the auxiliary chamber and the reservoir. When the valve member closes the auxiliary chamber during a brake application the movement of the one piston relative to the reaction piston increases fluid pressure in the auxiliary chamber to oppose movement of the one piston. Therefore, the increase of fluid pressure within the one pressure chamber is restricted so as to proportion fluid communication from the one pressure chamber.
REFERENCES:
patent: 2332301 (1943-10-01), Cox
patent: 3140587 (1964-07-01), Stelzer
patent: 3355887 (1967-12-01), Balster
patent: 3698190 (1972-10-01), Miyai
Decker Ken C.
Hershkovitz Abraham
Schoenle Paul David
The Bendix Corporation
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