Brake cylinder pressure maintaining valve

Details Brake cylinder pressure maintaining valve Brake cylinder pressure maintaining valve

1981-10-09

1984-10-02

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Automatic

Equalizing valves

303 63, B60T 1522

Patent

active

044744129

ABSTRACT:
A railroad air brake system for truck mounted air brakes includes an ABDW valve and auxiliary and emergency reservoirs with pipe connections therebetween. There is a brake pipe and a connection between the brake pipe and the ABDW valve. Truck mounted brake cylinders are located at each truck and a brake cylinder pipe connects the brake cylinders with the ABDW valve. A brake cylinder pressure maintaining valve is connected to the brake pipe, brake cylinder pipe and volume reservoir, as well as to the emergency reservoir. The brake cylinder pressure maintaining valve operates to provide air from the volume reservoir to the brake cylinder pipe and thus the brake cylinders when pressure in the brake cylinder pipe drops below a predetermined level, thus insuring a minimum brake application pressure, regardless of the piston travel of the brake cylinders.

REFERENCES:
patent: 2846270 (1958-08-01), Cook
patent: 3169801 (1965-02-01), Racki
patent: 3300255 (1967-01-01), Racki
patent: 3734575 (1973-05-01), Paginton
patent: 4127308 (1978-11-01), McEathron

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