Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1984-06-26
1986-08-05
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, 303 24C, B60T 826, B60T 1718
Patent
active
046039171
ABSTRACT:
A fluid pressure controlling valve for a dual-path brake system having a small of number of parts, compact construction, low cost and high reliability. The valve includes a pressure reducing valve for outputting an input fluid pressure of the first system and a follower valve for outputting a fluid pressure of the second system substantially equal to that of the first system and following the output fluid pressure of the first system. The follower valve is connected in series with the pressure reducing valve and has a first pressure receiving portion receiving an output fluid pressure of the first system in a valve opening direction and a second pressure receiving portion receiving an output fluid pressure of the second system acting in a valve closing direction and having an area equal to that of the first pressure receiving portion. The follower valve includes a fluid pressure responsive plunger having a third pressure receiving portion receiving the input fluid pressure of the second system in the valve opening direction and a fourth pressure receiving portion receiving the input fluid pressure of the first system, introduced through a fluid communication passage formed in the plunger, acting in the valve closing direction. The pressure receiving areas of the first through fourth pressure receiving portions are such that a=b, c=d and b.ltoreq.c, where a, b, c and d respectively represent the pressure receiving areas of the first through fourth pressure receiving areas.
REFERENCES:
patent: 3304128 (1967-02-01), Farr
patent: 4053186 (1977-10-01), Jakobi
patent: 4331363 (1982-05-01), Berisch
patent: 4385786 (1983-05-01), Kubota
Butler Douglas C.
Sumitomo Electric Industries Ltd.
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