Variable ratio master cylinder

Details Variable ratio master cylinder Variable ratio master cylinder

1972-09-13

1976-09-21

Schwadron, Martin P.

Power plants

Pressure fluid source and motor

Pulsator

60562, 188347, B60T 1112

Patent

active

039811468

ABSTRACT:
A variable ratio master cylinder designed to operate, in one phase, to take up slack in a braking system by displacing a relatively large volume of fluid at a low pressure with minimum pedal travel and then gradually shift to another phase in which a smaller volume of fluid is displaced at a higher pressure with increased pedal travel to apply the brakes. The master cylinder includes a differential area metering valve which begins to open at a predetermined pressure in the pressure chamber and remains open above a predetermined second pressure and sealing means cooperative with at least one piston to seal off communication between the pressure chamber and the rear of the piston during the pressure stroke of the piston but to allow communication between said chambers on the return stroke of the piston for rapid return to the released state.

REFERENCES:
patent: 2031360 (1936-02-01), Boughton
patent: 2180454 (1939-11-01), Bowen
patent: 2448194 (1948-08-01), Schnell
patent: 3165896 (1965-01-01), Baldwin
patent: 3391646 (1968-07-01), Schlosser
patent: 3633367 (1972-01-01), Baldwin

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