B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/36
B60T 15/18 (2006.01) B60T 15/42 (2006.01)
Patent
CA 1064550
EMERGENCY PORTION FOR A BRAKE CONTROL VALVE ABSTRACT OF THE DISCLOSURE 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.
290814
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