B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/70
B60T 15/16 (2006.01) B60T 13/22 (2006.01) B60T 15/02 (2006.01) B60T 15/04 (2006.01)
Patent
CA 1126792
Brake Control Circuit With Parking and Retarding Valves Abstract Conventional fluid control circuits for brakes, including separate parking and retarding valves, include high volume lines and/or complex mechanical linkages to selectively effect the braking functions. This invention provides a relatively non- complex fluid control circuit for closely controlling engagement of brakes, including a first valve for con- trolling engagement of the brakes, a pilot line, a second valve connected to the pilot line, and movable between a closed position and an open position for venting an inlet to the first valve, and a third valve for closing the pilot line and the second valve or for venting the pilot line to open the second valve to vent the inlet to the first valve. The third valve may include interassociated parking and retarder valves adapted for common attachment within a cab of a vehicle for ready access by an operator thereof.
355089
Hoefer Wayne A.
Tanty Paul J.
Caterpillar Tractor Co.
Kirby Eades Gale Baker
LandOfFree
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