B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/70
B60T 15/00 (2006.01) B60T 13/38 (2006.01) B60T 17/18 (2006.01)
Patent
CA 1183185
Abstract of the Disclosure A normally closed valve for normally conducting fluid under pressure from a first source to a point of lower pressure for performing a first function and having a control port connected to a second source of fluid under pressure normally performing a second function. The valve is provided with an actuator for holding the valve open and which actuator causes the valve to close when the second function. The valve is particularly suitable for use in a conventional air brake system for vehicle wherein separate sources of air under pressure are employed to conduct air to a service brake air chamber for applying the brakes during normal running conditions and to a spring brake air chamber for holding the spring actuated braking device out of braking condition except when used for parking or in an emergency. In this application the valve permits the application of both the service brake force and spring brake force to enhance the holding effect. The valve includes a limiting check valve action wherein the pressure developed in the service brake line is relieved when it exceeds a predetermined amount.
368860
George H. Riches And Associates
Graham John M.
LandOfFree
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