Master cylinder and sleeve for controlling a proportioning valve

Details Master cylinder and sleeve for controlling a proportioning valve Master cylinder and sleeve for controlling a proportioning valve

1979-10-04

1981-05-05

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188345, 303 84A, B60T 1300

Patent

active

042654912

ABSTRACT:
A master cylinder includes a bore communicating with a reservoir and movably receiving a pair of pistons. The pair of pistons cooperate with the housing to substantially form a pair of pressure chambers. An outlet port communicates one of the pressure chambers with a brake circuit and a valve assembly within the outlet port is responsive to the fluid pressure therein to vary communication to the brake circuit. A sleeve within the housing bore movably receives one of the pair of pistons and forms a clearance to communicate the valve assembly with the reservoir independently of the outlet port. The valve assembly is movable in response to a pressure differential between the pair of pressure chambers to close communication between the valve assembly and the reservoir and open communication between the one pressure chamber and the valve assembly independently of the outlet port so as to deactivate the valve assembly. The sleeve also forms an aperture communicating the reservoir with the one pressure chamber.

REFERENCES:
patent: 3686864 (1972-08-01), Shutt
patent: 3926476 (1975-12-01), Mathues
patent: 4078384 (1978-03-01), Shutt

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