B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/46
B60T 15/22 (2006.01) B60T 15/18 (2006.01) B60T 15/42 (2006.01)
Patent
CA 1111466
NEW POPPET VALVE TYPE BRAKE CONTROL VALVE DEVICE ABSTRACT OF THE DISCLOSURE A brake control valve device for a railway vehicle having a service valve piston assembly subject to a pressure differen- tial between the brake pipe and a single reservoir acting on a first piston and to brake cylinder delivery pressure acting on a second piston of the assembly. A brake pipe reduction actuates the service valve assembly, toward service application position, in which position, the single reservoir pressure is connected to a pilot chamber of a brake cylinder exhaust control valve for actuating a brake cylinder exhaust valve to its closed position, while concurrently, connecting the single reservoir pressure to the car brake cylinders. Pressure limiting means is provided to assure that sufficient pressure remains in the single reservoir following a full service or overreduction application for the purpose of providing additional braking pressure during an emergency brake application. In the event the brake pipe reduction is only due to a pressure transient of short term duration, the service valve assembly is capable of dissipating sufficient reservoir pressure to counteract such brake pipe transient and accordingly prevent its movement to service application position.
326764
American Standard Inc.
Fetherstonhaugh & Co.
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