Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1975-05-14
1976-08-17
Halvosa, George E. A.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188151A, 188349, 200 82D, 303 84A, B60T 826, B60T 1722
Patent
active
039750604
ABSTRACT:
In a brake system including two independent hydraulic lines extending from a dual type brake master cylinder and connected to the respective rear wheel brakes, a novel pressure control device provided for automatically adjusting the ratio of the front to the rear wheel brake pressure for maximized overall braking efficiency and including failure alarm for warning the driver of any trouble in operation of the device or of any fluid leakage on the hydraulic lines without delay. The device includes a cylinder bore fitted with a pair of annular pistons and a balance piston extending axially therethrough. A pair of sealing rings are mounted on the balance piston at the opposite ends thereof to define each an input and an output hydraulic chamber, respectively connected with the upstream and downstream portions of the associated one of the two hydraulic lines and adapted to be placed in communication with each other with displacement of the balance piston from its neutral position. A pair of control valves are arranged each between the adjacent input and output hydraulic chambers and operable normally to reduce the fluid pressure in the output chamber relative to that in the input chamber at a predetermined ratio. The balance piston when moved in either direction from its neutral position actuates a switch unit inserted in an electrical alarm circuit.
REFERENCES:
patent: 3427582 (1969-02-01), Brandon, Jr.
patent: 3441318 (1969-04-01), Bueler
patent: 3450443 (1969-06-01), Bueler
patent: 3459000 (1969-08-01), Oberthur
patent: 3672732 (1972-06-01), Green
patent: 3700286 (1972-10-01), Bueler
patent: 3708211 (1973-01-01), Bueler
patent: 3738709 (1973-06-01), Stokes
Butler Douglas C.
Halvosa George E. A.
Nisshin Kogyo Kabushiki Kaisha
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