B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/21
B60T 8/20 (2006.01) B60T 8/18 (2006.01) B61H 13/30 (2006.01)
Patent
CA 1261902
EMPTY AND LOAD VALVE FOR A RAILROAD CAR BRAKE SYSTEM ABSTRACT OF THE DISCLOSURE An empty and load valve for a railroad car brake system is mounted on the bolster of a truck and has a sensing arm engageable with a side frame of the truck. An empty and load device is mounted on each intermediate truck of an arti- culated car. The device has a valve body with a manifold and an equalizing reservoir attached thereto. A first air pas- sage extends through the valve body and a second air passage extends in the valve body from the first air passage to the equalizing reservoir. A piston assembly is reciprocable in the first air passage to open and close the passage and thereby proportion the available air supply. A plunger is movable in the valve body in response to the sensing arm to disable the piston assembly when a loaded condition is sensed. The plunger also allows a valve in the second air passage to close when a loaded condition is sensed so that all of the available sir supply is supplied to the brake actuator.
508511
Campbell Robert E.
Schmitt Eugene W.
Riches Mckenzie & Herbert Llp
Sloan Valve Company
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