Vent valve device having disabling means

Details Vent valve device having disabling means Vent valve device having disabling means

1991-07-29

1993-05-04

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Automatic

Equalizing valves

303 82, 303 86, 303 57, B60T 1134

Patent

active

052074820

ABSTRACT:
A railway car vent valve device having a bleed valve that is selectively operable to disable the vent valve device during a single car test procedure in which the service stability of the car control valve is checked. The bleed valve is automatically reset when the car brake pipe pressure drops below a predetermined value, such as occurs when the single car test apparatus is disconnected from the car brake pipe following completion of the single car test procedure.

REFERENCES:
patent: 1877554 (1932-09-01), Bushnell
patent: 4025126 (1977-05-01), Wilson
patent: 4043604 (1977-08-01), Hart

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