Fluid-pressure and analogous brake systems – Automatic – Synchronizing
Patent
1986-11-14
1988-05-17
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Automatic
Synchronizing
303 33, B60T 1530, B60T 1134
Patent
active
047446099
ABSTRACT:
A freight brake control valve device in which the emergency piston is arranged to operate a pair of slide valves having lost motion therebetween to provide a continuous, local reduction in the brake pipe pressure in response to initial actuation of the emergency piston when a service rate of brake pipe pressure reduction is made, in order to quickly propagate a brake pipe pressure reduction wave along the train and accordingly provide an accelerated application of the train brakes. This accelerated application function in response to a service rate of brake pipe pressure reduction is achieved during movement of the emergency piston toward emergency position, during which movement, the quick-action chamber "breathing" function also occurs, the latter being presently incorporated in the emergency piston slide valve to stabilize the emergency piston following initial actuation thereof, so as to prevent further actuation of the emergency piston to emergency position.
REFERENCES:
patent: 2012375 (1935-08-01), Campbell
patent: 2939746 (1960-06-01), Pickert
patent: 4536040 (1985-08-01), Eder
American Standard Inc.
Falce G. J.
Kashnikow Andres
Newholm Timothy
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