Tandem master cylinder with piston stops and central valves

Details Tandem master cylinder with piston stops and central valves Tandem master cylinder with piston stops and central valves

1988-10-21

1990-07-10

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Pulsator

60589, B60T 1120, F15B 708

Patent

active

049399012

ABSTRACT:
A tandem master cylinder for hydraulic brake systems of automotive vehicles comprising a housing in whose bore a first and a second piston are sealingly and slidably disposed. The piston in the inactive position abut on stops in the housing under the action of a first and a second resetting spring and which, within the bore, confine a first and a second pressure chamber which are in communication with a first and a second unpressurized supply chamber via central valves that are open when in the inactive position. The first piston-resetting spring is anchored on the second piston, and its spring rate is greater than the spring rate of the second piston-resetting spring.

REFERENCES:
patent: 3731487 (1973-05-01), Beyer et al.
patent: 3877228 (1975-04-01), Shellhouse
patent: 4296604 (1981-10-01), Kizaki et al.
patent: 4472941 (1984-09-01), Schopper et al.
patent: 4505519 (1985-03-01), Muterel
patent: 4707989 (1987-11-01), Nakamura et al.

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