Fluid pressure control device for vehicle braking systems

Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors

Patent

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Details

303 24C, 303 24F, B60T 814

Patent

active

042549965

ABSTRACT:
A fluid pressure control device in the form of an inertia-controlled valve unit comprises a bypass passage provided through a stepped piston to directly apply the master cylinder pressure to the wheel brake cylinders; a bypass valve including a valve seat provided within the bypass passage to permit the bypass flow of fluid between the inlet and outlet ports, a valve member axially movable within the bypass passage to co-operate with the valve seat to block the bypass flow, and a spring biasing the valve member toward the inlet port, the bypass valve being closed when a pressure difference between the inlet and outlet ports is below a predetermined value and being opened when the pressure difference exceeds the predetermined value; and an extension rod extended from the valve member toward the inlet port and being engageable with the inner wall of the valve housing to open the bypass valve.

REFERENCES:
patent: 4072363 (1978-02-01), Tomoyuki
patent: 4161339 (1979-07-01), Kawaguchi et al.
patent: 4181370 (1980-01-01), Noeami et al.

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