Relay valve device

Details Relay valve device Relay valve device

1985-10-21

1987-03-31

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Automatic

1376275, 303 50, 303 84R, B60T 818, B60T 1502, B60T 1512

Patent

active

046538119

ABSTRACT:
A relay valve device which is actuated by the presence of a control signal pressure to a higher pressure supply into a consumer circuit than when the control signal pressure is not present. The relay valve device includes a first control surface and a second control surface, and includes a shut-off device disposed in the feed line of the control pressure to the second control surface. The shut-off device is opened when the control signal pressure is present and is closed when the control signal pressure is not present, and also causes the second control surface to be connected with atmosphere.

REFERENCES:
patent: 3190700 (1965-06-01), Fites
patent: 3302982 (1967-02-01), Pekrul
patent: 3413042 (1968-11-01), Herold
patent: 3861761 (1975-01-01), Siebold et al.
patent: 3964794 (1976-06-01), Scholz
patent: 4030757 (1977-06-01), Durling
patent: 4116492 (1978-09-01), Reinecke
patent: 4410218 (1983-10-01), Bueler
patent: 4455051 (1984-06-01), Falk

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