Fluid-pressure and analogous brake systems – Automatic – Synchronizing
Patent
1977-10-17
1978-11-28
Reger, Duane A.
Fluid-pressure and analogous brake systems
Automatic
Synchronizing
303 22R, 303 57, B60T 1522
Patent
active
041273087
ABSTRACT:
A fluid brake control system is disclosed for governing application and release of brakes of an interchange vehicle having a brake control pipe, an auxiliary fluid reservoir, a fluid brake cylinder, and a brake control device sensing changes in fluid pressure in the brake pipe for at times governing application of fluid to the brake cylinder from the auxiliary reservoir and at other times for releasing fluid from the brake cylinder. Additional first and second volume chambers are provided that are proportionally smaller in volume than the auxiliary reservoir and brake cylinder displacement volumes respectively. Valve governed passageways are provided for normally charging the first volume chamber from the brake pipe and for preventing fluid flow from the auxiliary reservoir to the first volume chamber. The second volume chamber is charged from the first volume chamber upon sensing a reduction of pressure in the brake pipe at a rate to reduce pressure in the first volume chamber proportional to a service rate of reduction in the brake pipe, and relay control apparatus is provided for sensing a difference in fluid pressure between the brake cylinder pressure and pressure in the second volume chamber for governing the flow of fluid from the auxiliary reservoir to the brake cylinder.
An emergency application is obtained by the use of sequenced proportioning valves wherein the brake cylinder is pressurized first from the auxiliary reservoir and then from an emergency reservoir.
Apparatus is provided by which the second volume chamber can have its effective volume varied in accordance with the weight of the vehicle.
REFERENCES:
patent: 2992861 (1961-07-01), Hursen
patent: 3966269 (1976-06-01), McEathron
patent: 3966270 (1976-06-01), McEathron
patent: 3966271 (1976-06-01), McEathron
patent: 3967864 (1976-07-01), McEathron
patent: 3985401 (1976-10-01), Worbois
New York Air Brake Company, Instruction Pamphlet No. 5050-7, Sept. 1948, D-22-P Passenger Car Brake Equipment.
General Signal Corporation
Reger Duane A.
Wynn Harold S.
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