Emergency portion for a brake control valve

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

1976-12-10

1978-09-12

Halvosa, George E. A.

Fluid-pressure and analogous brake systems

Automatic

Synchronizing

303 80, 303 82, 303 85, B60T 1544

Patent

active

041133196

ABSTRACT:
An upgraded railway freight car brake control valve device comprises a novel emergency valve portion that embodies therein a plurality of simple and inexpensive poppet valves and a spool-type valve which valves replace yet perform the same functions heretofore performed by more expensive slide-type valves which slide valves, and the flat seats upon which they slide as they are shifted from one position to another, in their manufacture require a considerable amount of accurate machining thus increasing the cost of the brake control valve device of which they are an important part.

REFERENCES:
patent: 2106491 (1938-01-01), Sexton
patent: 2830850 (1958-04-01), McClure et al.
patent: 2836466 (1958-05-01), Cook
patent: 2905508 (1959-09-01), Rush
patent: 2994565 (1961-08-01), McClure et al.
patent: 3706480 (1972-12-01), Washbourn
patent: 3988044 (1976-10-01), Hill
patent: 4045095 (1977-08-01), Temple

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