Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1975-04-22
1976-08-31
Kunin, Stephen G.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188151A, 188349, 200 82D, 303 84A, B60T 826
Patent
active
039777316
ABSTRACT:
A fluid pressure device usable in a vehicle brake system which includes a dual master cylinder inserted into two mutually independent fluid lines which are connected between the front and rear wheel brakes. The device is arranged across the fluid lines between the brake master cylinder and the rear wheel brakes and includes a pair of differential pistons slidably accommodated in a cylinder bore and a balance piston slidable in the bore between the differential pistons, a pair of input fluid chambers being defined between the balance piston and the differential pistons and connected with respective upstream portions of the fluid lines while a pair of output fluid chambers are defined on the outer sides of the differential pistons and connected with the adjacent input fluid chambers through fluid control valves and with respective downstream portions of the fluid lines. The differential pistons are operated under differential pressures exerted upon opposite ends thereof to reduce the fluid pressure at the rear wheel brakes at a definite ratio relative to that at the front wheel brakes so that an improved overall braking efficiency is obtained. The balance piston is normally held in a neutral position and is moved away therefrom, in case of a fluid leakage present in either of the fluid lines, to energize an external alarm, thereby warning the operator of such failure.
REFERENCES:
patent: 3427416 (1969-02-01), Papin
patent: 3441318 (1969-04-01), Bueler
patent: 3738709 (1973-06-01), Stokes
patent: 3804468 (1974-04-01), Ishikawa et al.
patent: 3817584 (1974-06-01), Huston et al.
Butler Douglas C.
Kunin Stephen G.
Nisshin Kogyo Kabushiki Kaisha
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