Brake system and relay valves for railroad trains

Details Brake system and relay valves for railroad trains Brake system and relay valves for railroad trains

1986-10-31

1988-09-06

Nilson, Robert G.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

13763015, 303 28, 303 40, F16K 31126

Patent

active

047685565

ABSTRACT:
A braking system for railroad freight trains and a novel relay valve for use in the system are disclosed. The relay valve permits the brake system to be configured so that the requirement for expensive control valves is minimized. The novel relay valve is interposed between the control valve and a number of brake cylinders. Upon a signal from the control valve, the relay valve delivers brake air to the cylinders from a pre-charged reservoir or other source. The novel relay valve includes primary and secondary flow valves to cause air to be delivered to the brakes in a controlled manner. An exhaust valve arrangement in the relay valve permits the brakes to be released.

REFERENCES:
patent: 2259809 (1941-10-01), Freeman
patent: 3631894 (1972-01-01), Frantz
patent: 3945401 (1976-03-01), Greenwood
patent: 3961645 (1976-06-01), Kagen
patent: 4484668 (1984-11-01), Williamson

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