Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1982-09-13
1984-11-06
Schwadron, Martin P.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
303 40, B60T 1522
Patent
active
044806639
ABSTRACT:
The invention relates to a pneumatic relay valve for regulating output pressure in proportion to a control pressure.
The relay valve includes a first piston member which is acted on by the control pressure and a second piston member which is acted on by the input pressure.
A compression spring is located between the two relay piston members.
The strength of the compression spring determines the height of a predetermined minimum controlled pressure even if the input pressure is subsequently lost or drops to a low value.
In addition, the output pressure of a receiver can be maintained at a specific adjustable level which may be below the maximum pressure value of the input pressure due to the compression spring located between the two relay piston members.
REFERENCES:
patent: 2969802 (1961-01-01), Rich
patent: 3078716 (1963-02-01), Winters
patent: 3491785 (1970-01-01), Kay
patent: 3770019 (1973-11-01), Stelzer
patent: 3927916 (1975-12-01), Masuda
patent: 4118076 (1978-10-01), Mild
patent: 4134418 (1979-01-01), Woodcock
Bergemann Klaus-Dieter
Deike Karl-Heinz
Kiel Bernd-Joachim
Konig Heinz-Werner
Malkin Mark
Schwadron Martin P.
Sotak J. B.
WABCO Fahrzeugbremsen GmbH
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