Fluid-pressure and analogous brake systems – Automatic – Synchronizing
Patent
1982-07-08
1984-05-22
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Automatic
Synchronizing
303 82, 303 83, B60T 1538
Patent
active
044497598
ABSTRACT:
A service brake accelerator having a line chamber (3) connected to the main air supply line (1) and a reference pressure chamber (6) connected to the line chamber via a nozzle (7). The line chamber is separated from the reference pressure chamber by a diaphragm piston (5) which is biased by a spring (10) against a valve seat (9) projecting into the reference pressure chamber and restricting a nozzle opening (23) to the inner chamber (24) of a second valve seat (20). A second diaphragm piston (17) is biased against this second valve seat by a spring (21). The space (16) surrounding the second valve seat can be connected, partly throttled, via a nozzle (14), to the line chamber by way of a shut-off valve (12, 13) which opens laterally of the reference pressure chamber upon overbalancing pressure upon the first diaphragm piston; this space is always open to atmosphere via a further nozzle (25). The accelerator operates cyclically and has a safe, stable neutral position between its work cycles and rest position.
REFERENCES:
patent: 3022116 (1962-02-01), Hewitt
patent: 4025126 (1977-05-01), Wilson
patent: 4073544 (1978-02-01), Hart
patent: 4113319 (1978-09-01), Zoric
patent: 4145090 (1979-03-01), Hart
patent: 4206949 (1980-06-01), Rathband et al.
patent: 4226482 (1980-10-01), Stauble et al.
Butler Douglas C.
Knorr-Bremse GmbH
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