Pilot relay valve with load piston

Details Pilot relay valve with load piston Pilot relay valve with load piston

1992-04-28

1993-11-16

Rivell, John

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

13759618, 251282, 303 28, 303 40, F16K 1104, B60T 1502

Patent

active

052614581

ABSTRACT:
A relay valve for a fluid pressure braking system includes a relay piston and a load piston which is responsive to the pressure at the inlet port of the relay valve to exert a biasing force on the relay piston loading the latter against the inlet/exhaust valve. The biasing force is opposed by fluid pressure at the inlet port acting across the effective area of the inlet/exhaust valve. The biasing force is greater than the spring force holding the inlet/exhaust valve closed, so that the valve responds immediately to pressure signals transmitted through the control port of the relay valve.

REFERENCES:
patent: 2859763 (1958-11-01), Fites
patent: 3105508 (1963-10-01), Bowditch et al.
patent: 3252471 (1966-05-01), Olson
patent: 3284142 (1966-11-01), Bueler
patent: 3399933 (1968-09-01), Alfieri et al.
patent: 3584652 (1971-06-01), Huntington
patent: 3646969 (1972-03-01), Stampfli
patent: 3752190 (1973-08-01), Brake
patent: 4181367 (1980-01-01), Herring et al.
A Brochure, #91-015, "R8-P Relay Valve", Company unknown, Date unknown.

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