Fluid-pressure and analogous brake systems – Flow retarder – Isolation valve
Patent
1976-09-20
1977-10-18
Reger, Duane A.
Fluid-pressure and analogous brake systems
Flow retarder
Isolation valve
137118, B60T 1718
Patent
active
040543277
ABSTRACT:
An air brake system for a vehicle with a plurality of air-operated brakes has means for retaining braking capacity in the event of line rupture or severe leakage at various points in the system. Brake control means, preferably of the form with two separately actuatable control valves each independently capable of actuating the brakes, has two check valve-protected air-receiving ports each coupled to a separate one of two reservoirs. The reservoirs are charged through separate air supply passages from a compressor and means are provided for blocking air flow from the compressor to either supply passage in response to a pressure loss in either passage from line rupture or severe leakage. Such means may be a pilot-controlled shuttle valve situated at the compressor outlet or a pair of air fuses of the kind which close when air flow exceeds a predetermined value. In a preferred form, both the shuttle valve and air fuses are present as each enhances the actuation of the other.
REFERENCES:
patent: 2110342 (1938-03-01), Salvo
patent: 2534871 (1950-12-01), Lichtman
patent: 2861845 (1958-11-01), Keehn
patent: 2874002 (1959-02-01), Cambeis
patent: 3018786 (1962-01-01), Stratton
patent: 3278242 (1966-10-01), Nakamura
patent: 3583436 (1971-06-01), Chouings
Caterpillar Tractor Co.
Reger Duane A.
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