Fluid-pressure and analogous brake systems – Multiple control – Double heading
Patent
1977-02-24
1979-09-04
Kazenske, Edward R.
Fluid-pressure and analogous brake systems
Multiple control
Double heading
188151A, B60T 1118
Patent
active
041666542
ABSTRACT:
A vehicle braking system is provided having alternate, automatically selected actuating fluid circuits, either hydraulic or air circuits, interconnected between a master brake cylinder actuated by a vehicle operator and a brake actuating cylinder that operates the brake shoes at a wheel of the vehicle. A first actuating fluid circuit is normally connected in communicating relationship between the master cylinder and actuating cylinders by fluid-pressure responsive valves. Failure in buildup of fluid pressure in the first circuit when the master cylinder is actuated, such as would be due to a break or leak in the primary actuating fluid line, results in automatic operation of the valves to interconnect a second circuit in bypass relationship to the first circuit. The pressure responsive valves are not operational unless the brake master cylinder is being actuated. Once the valves have been actuated due to a failure in the first circuit, these valves remain in the position where the second circuit remains interconnected and the vehicle may continue to be operated with a fully operational fluid brake system. A modified form of the system is adaptable to accommodating a brake lockup mechanism in the automatically responsive system.
REFERENCES:
patent: 3015522 (1962-01-01), Spikes
patent: 3129036 (1964-04-01), Price et al.
patent: 3520136 (1970-07-01), Stiward
patent: 3572847 (1971-03-01), Luft
patent: 3582150 (1971-06-01), Williams et al.
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