Braking hydraulic pressure control unit for motor vehicle

Details Braking hydraulic pressure control unit for motor vehicle Braking hydraulic pressure control unit for motor vehicle

1979-02-21

1980-12-23

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

188349, 303 24A, 303 24C, 303 24F, B60T 814

Patent

active

042406714

ABSTRACT:
A braking hydraulic pressure control unit for a motor vehicle including a differential-acting piston having a plurality of pressure bearing portions facing an inlet compartment and an outlet compartment communicating with a master cylinder and rear wheel cylinders, respectively, of a vehicle braking system. The differential-acting piston is formed with shoe clearance compensating piston segments operative to reduce an inflow of a braking fluid into a spherical valve chamber at initial stages of brake application whereby unfavorable influences which would otherwise be exerted by the size of shoe clearances on a spherical valve at initial stages of brake application can be prevented.

REFERENCES:
patent: 3944292 (1976-03-01), Doi et al.
patent: 4072363 (1978-02-01), Tomoyuki
patent: 4161339 (1979-07-01), Kawaguchi et al.

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