Emergency vent valve

Details Emergency vent valve Emergency vent valve

1994-11-15

1996-03-26

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Releasing

Motor

303 74, 303 82, B60T 1518

Patent

active

055015131

ABSTRACT:
An emergency vent valve including a piston responsive to the differential pressure between the brake pipe and a control volume to open a vent valve to vent the brake pipe to atmosphere and includes an exhaust valve responsive to the differential pressure between brake pipe and control volume to connect the control volume to atmosphere through a service check and when the vent valve is opened through a second blow-down choke of a lesser rate which limits the exhausting of the control chamber. A choke valve connected to the piston connects the blow-down choke in series with the service choke when the vent valve becomes fully open.

REFERENCES:
patent: 4014580 (1977-03-01), Bridigum
patent: 4026609 (1977-05-01), Bridigum
patent: 4037880 (1977-07-01), Bridigum
patent: 4974911 (1990-12-01), Hart
patent: 5083843 (1992-01-01), Engle
patent: 5096266 (1992-03-01), Skantar

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