Emergency portion for a brake control valve

Details Emergency portion for a brake control valve Emergency portion for a brake control valve

1976-11-11

1977-08-23

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Automatic

Equalizing valves

303 42, 303 80, B60T 1518

Patent

active

040436047

ABSTRACT:
A railway freight car brake control valve device comprises a novel emergency valve portion that embodies therein a plurality of simple and inexpensive diaphragm-type valves certain of which are subject on their respective opposite sides to brake pipe pressure and quick action chamber pressure. The construction and arrangement of these diaphragm-type valves are such that a service rate of reduction of brake pipe pressure enables flow of fluid under pressure from the quick action chamber to the brake pipe at a service rate, and an emergency rate of reduction of brake pipe pressure enables one of these diaphragm-type valves to effect the supply of fluid under pressure from the quick action chamber to a brake pipe vent valve device the resulting operation of which vents fluid under pressure from the brake pipe to atmosphere at an emergency rate to thereby cause an emergency brake application.

REFERENCES:
patent: 2087623 (1937-07-01), Canetta et al.
patent: 2106491 (1938-01-01), Sexton
patent: 3232678 (1966-02-01), Wilson
patent: 3734575 (1973-05-01), Paginton
patent: 3967864 (1976-07-01), McEathron

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