Fluid-pressure and analogous brake systems – Releasing – Control pipe
Patent
1977-08-15
1978-08-22
Kunin, Stephen G.
Fluid-pressure and analogous brake systems
Releasing
Control pipe
303 37, 303 69, B60T 1704
Patent
active
041085019
ABSTRACT:
A brake accelerator for drawing off air from the brake line of an air brake system for railway vehicles has a piston one side of which is subjected to air pressure in the brake line and the other side is subjected to a control pressure in an expansion chamber connected to the brake line through a throttle opening. A first valve is in a connection between the brake line and a pressure accumulation chamber connected to the atmosphere through a second throttle opening. The first valve is actuated by the first piston when the control pressure exerted on the first piston is predominant. A second valve opens subsequently to the first valve and is located in a connection leading from the expansion chamber through a throttle opening to the atmosphere. The second valve is actuated by a second piston loaded by the pressure in the pressure accumulation chamber in the direction to open the second valve against the force of a spring urging the second valve into its closed position.
REFERENCES:
patent: 3966269 (1976-06-01), McEathron
patent: 3988044 (1976-10-01), Hill
patent: 4026609 (1977-05-01), Bridigum
Hintner Josef
Pick Peter
Jaskiewicz Edmund M.
Knorr-Bremse GmbH
Kunin Stephen G.
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