Fluid-pressure and analogous brake systems – Load control – Empty and load type
Patent
1992-10-19
1993-12-14
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Load control
Empty and load type
303 227, 188195, B60T 818
Patent
active
052695956
ABSTRACT:
An empty/load changeover valve device for a railway car having a proportioning valve via which the car control valve supplies brake cylinder pressure. The proportioning valve comprises a balance piston having equal opposing pressure areas and a combined supply and release check valve, one pressure area of the balance piston being subject to air pressure supplied to the brake cylinder under all conditions of loading. The opposing pressure area of the balance piston is either pressurized or depressurized depending upon the car being in an "empty" or "load" condition, thereby establishing either a nonproportioning or a proportioning mode of brake control. Integrating the release check valve with the supply valve so as to have a smaller effective pressure area, the release check valve can be opened with low force to exhaust brake cylinder pressure during brake release, thereby making possible a reduced size empty/load changeover valve device.
REFERENCES:
patent: Re28539 (1975-09-01), Scott
patent: 2830849 (1958-04-01), Erson et al.
patent: 3369846 (1968-02-01), Scott
patent: 3376080 (1968-04-01), Kettering et al.
patent: 3612621 (1971-10-01), Scott
patent: 3671086 (1972-06-01), Scott
patent: 4080005 (1978-03-01), Engle
patent: 4235477 (1980-11-01), Hart
patent: 4235478 (1980-11-01), Billeter
patent: 4585279 (1986-04-01), Doto
patent: 4786117 (1988-11-01), Hart
patent: 4801179 (1989-01-01), Hintner
patent: 5005915 (1991-04-01), Hart et al.
patent: 5100207 (1992-03-01), Mckay
patent: 5106168 (1992-04-01), Mckay
Hart James E.
McKay Albert A.
Falce G. J.
Oberleitner Robert J.
Poon Peter M.
Westinghouse Air Brake Company
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