Brakes – Wheel – Transversely movable
Patent
1977-03-16
1978-04-11
Makay, Albert J.
Brakes
Wheel
Transversely movable
37126A, 188264P, F16D 65853
Patent
active
040834697
ABSTRACT:
A brake cooling circuit which includes a pump for circulating cooling fluid to the brakes in a scraper portion of a tractor scraper combination is driven by a motor powered by hydraulic fluid communicated through conduits leading to one of the implements of the scraper. Selective actuation of the brake cooling circuit may be accomplished manually by the operator. Automatic actuation of the brake cooling circuit is also provided upon a signal of a high temperature condition in the brakes. The vehicle hydraulic circuit is designed to override the cooling circuit upon actuation of the implement by the operator. Upon completion of the work cycle of the implement, the cooling circuit is reactuated. The cooling circuit is comprised of the motor driving the pump and the fan, a radiator, conduits for communicating cooling fluid through the radiator and to the brakes, a control assembly, and a separate source of cooling fluid. In the control assembly, vehicle air pressure is used to operate a series of valves to divert a limited flow of pressurized hydraulic fluid from the implement circuit to run the motor.
REFERENCES:
patent: 2976965 (1961-03-01), Schjolin
patent: 3730301 (1973-05-01), Heck et al.
patent: 3949844 (1976-04-01), Larson et al.
Caterpillar Tractor Co.
Makay Albert J.
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