Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1984-05-23
1985-11-26
Reger, Duane A.
Fluid-pressure and analogous brake systems
Pipeless valves
303116, B60T 1718
Patent
active
045551456
ABSTRACT:
Herein disclosed is a vehicular anti-lock system of the type, in which a valve mechanism is disposed in a main passage which connects a master cylinder and a brake system such that its opening and closing operations are controlled by the movement of a control piston having its one end subjected to the pressure of the brake system. A fail-safe piston is made movable in a cylinder and has its one end engaging with the valve seat member of the valve mechanism and its other end connected with a liquid pressure source which is independent of the master cylinder. The control piston is made movable in the fail-safe piston and has its other end facing a control chamber. Between the liquid pressure source and the control chamber, there is connected a first valve which is adapted to be closed in response to a brake releasing signal. Between the control chamber and a reservoir, there is connected a second valve which is adapted to be opened in response to the brake releasing signal. A bypass passage is disposed in parallel with the valve mechanism and is adapted to be closed when the fail-safe piston is caused to bring the valve seat member into engagement with the wall of the valve chamber by the pressure of the liquid pressure source.
REFERENCES:
patent: 3747990 (1973-07-01), Tanguy
patent: 3788710 (1974-01-01), Von Grunberg et al.
patent: 3981543 (1976-09-01), Atkins
patent: 4278300 (1981-07-01), Bacher
Maehara Toshifumi
Yoshizawa Hiroyuki
Akebono Brake Industry Company Ltd.
Reger Duane A.
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