Change-over valve device utilizing the lower pressure of a doubl

Details Change-over valve device utilizing the lower pressure of a doubl Change-over valve device utilizing the lower pressure of a doubl

1980-12-11

1983-03-01

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Automatic

Application valve

137112, 303 13, 303 66, B60T 1502

Patent

active

043753035

ABSTRACT:
A change-over valve device having a pair of oppositely disposed control pressure chambers subject to respective control pressures from two independent pressure input systems and operable for diverting the lower control pressure to a delivery chamber so as to increase the degree of the pressure normally delivered from the delivery chamber by an amount corresponding to the degree of such lower control pressure.

REFERENCES:
patent: 3272564 (1966-09-01), Romanini
patent: 3667815 (1972-06-01), Zoppi
patent: 3944287 (1976-03-01), Nagase
patent: 3996955 (1976-12-01), Kawabata
patent: 4239292 (1980-12-01), Nagase
patent: 4302058 (1981-11-01), Nagase et al.

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