Fluid pressure control device for vehicle braking systems

Details Fluid pressure control device for vehicle braking systems Fluid pressure control device for vehicle braking systems

1979-11-21

1981-03-10

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Multiple fluid-receiving devices

Multiple motors

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

Patent

active

042549973

ABSTRACT:
A fluid pressure control device for incorporation in a vehicle braking system between a master cylinder and a wheel brake cylinder which includes a housing provided with an inlet port for connection to the master cylinder, an outlet port for connection to the wheel brake cylinder, and a valve chamber communicating at one end thereof with the inlet port and at the other end thereof with the outlet port, an inertia-controlled valve including a valve seat provided in the valve chamber to permit the flow of fluid between the inlet and outlet ports therethrough, and an inertia-controlled valve element housed within the valve chamber to cooperate with the valve seat to cut off the flow of fluid from the inlet port to the outlet port when the valve element is subjected to a deceleration in excess of a predetermined value, a bypass passage for permitting direct fluid flow from the valve chamber into the outlet port, a check valve including a valve seat provided within the bypass passage and a valve member cooperating with the second valve seat, the check valve being biased open for allowing direct flow of fluid from the valve chamber to the outlet port until the pressure acting on the piston reaches a predetermined value.

REFERENCES:
patent: 2218194 (1940-10-01), Freeman
patent: 4072363 (1978-02-01), Tomoyuki
patent: 4116493 (1978-09-01), Hayashida
patent: 4181370 (1980-01-01), Noeami et al.

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