Empty and load valve for a railroad car brake system

Details Empty and load valve for a railroad car brake system Empty and load valve for a railroad car brake system

1985-06-17

1987-03-10

Reger, Duane A.

Fluid-pressure and analogous brake systems

Inertia control

188195, 303 6R, B60T 820

Patent

active

046486615

ABSTRACT:
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 articulated car. The device has a valve body with a manifold and an equalizing reservoir attached thereto. A first air passage 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 air supply is supplied to the brake actuator.

REFERENCES:
patent: 3338640 (1967-08-01), Kirk
patent: 3612230 (1971-10-01), Ludington et al.
patent: 3780837 (1973-12-01), Haydu
patent: 4291923 (1981-09-01), Billeter

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