Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1975-06-27
1976-09-14
Kunin, Stephen G.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, 303 24C, B60T 1306
Patent
active
039803430
ABSTRACT:
A load responsive proportioning valve for use on a vehicle having a source of hydraulic fluid and front and rear wheel hydraulically actuated brake systems, the assembly including proportioning valve means in one of the brake systems actuatable to modulate the brake pressure in that one system to provide for a reduced brake effect at the rear brake wheels relative to that of the front wheels to compensate for weight transfer during braking, the proportioning valve means including a piston member movable between positions opening and closing a flow path from the fluid source to the one brake system, bias means including a fluid spring providing a force to move the piston member toward one of the positions, and deceleration sensing means for controlling the magnitude of the fluid spring as a function of variations in the magnitude of deceleration of the vehicle, whereby the modulating effect of the proportioning valve means compensates for variations in loading of the vehicle.
REFERENCES:
patent: 3377108 (1968-04-01), Eddy
patent: 3403946 (1968-10-01), Thirion
patent: 3423936 (1969-01-01), Stelzer
patent: 3475059 (1969-10-01), Klein
patent: 3721475 (1973-03-01), Kawase et al.
patent: 3738711 (1973-06-01), Rockwell et al.
patent: 3825303 (1974-07-01), Yabuta
patent: 3881786 (1975-05-01), Stelzer et al.
Barefoot Galen L.
Kelsey-Hayes Company
Kunin Stephen G.
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