Fluid-pressure and analogous brake systems – Multiple systems – Fluid pressure and electric
Patent
1998-07-23
2000-10-17
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Multiple systems
Fluid pressure and electric
303 15, 303 20, 303 40, B60T 1374
Patent
active
061320099
ABSTRACT:
The present invention is a valve system for exhausting air from a brakepipe in a remote portion of a train. It has a pressure containment structure having a cylindrical bore and a piston mounted in the bore. A first valve chamber is on one side of the piston and a second valve chamber on a second side. A diaphragm seals between piston and bore, the diaphragm having an annular fold for permitting movement of the piston within the bore. The system has a first brakepipe pressure passageway for conveying air from the brakepipe to the first valve chamber and a control pressure connection for conveying air from a control chamber to the second valve chamber. A biasing means is provided for urging the piston toward the first valve chamber. A brakepipe exhaust valve connected to the piston is closed when the piston is moved toward the first valve chamber and opened when the piston is moved toward the second valve chamber so that when the pressure in the control chamber is reduced the brakepipe exhaust valve is opened and air is vented from the brakepipe. An annular sleeve is attached to the pressure containment structure and protrudes into the fold of the diaphragm to prevent the diaphragm from inverting if the pressure in the brakepipe drops below the pressure in the control chamber when the piston is positioned toward the first valve chamber.
REFERENCES:
patent: 2765811 (1956-10-01), McClure
patent: 2785933 (1957-03-01), McClure et al.
patent: 2905199 (1959-09-01), Cook
patent: 4334711 (1982-06-01), Mazur et al.
patent: 4776648 (1988-10-01), Newton et al.
patent: 5326159 (1994-07-01), Hart et al.
patent: 5564794 (1996-10-01), Hart
patent: 5918634 (1999-07-01), Hart
McNeil Michael
Sich Gary M.
Oberleitner Robert J.
Sy Mariano
Westinghouse Air Brake Company
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