Brakes – Operators – Fluid pressure
Patent
1996-04-29
1997-07-08
Butler, Douglas C.
Brakes
Operators
Fluid pressure
3031143, B60T 1300
Patent
active
056451458
ABSTRACT:
In a brake booster of the present invention, a valve plunger (20) rapidly moves forward to come into contact with a shaft portion (33a) of a first piston (33) and then presses the first piston (33)to quickly move forward according to the pedal pressure developed by quickly pedaling a brake pedal during emergency braking. Therefore, before an output shaft (32) outputs, i.e., before pressure is developed in a first fluid chamber (36) filled with fluid, the front end of a second cup packing (39) passes an open end of a first fluid path (31) formed at the first piston (33) side. As a result, the communication between the first fluid chamber (36) and the second fluid chamber (37) is permitted through the first fluid path (31) and a second fluid path (34) so that the fluid within the first fluid chamber (36) flows to the second fluid chamber (37), thereby stopping a reaction mechanism of the pressure in the first fluid chamber (36) and allowing the full load output of the brake booster (1) all at once.
REFERENCES:
patent: 4110985 (1978-09-01), Gordon et al.
patent: 4172364 (1979-10-01), Young
patent: 4565067 (1986-01-01), Tani et al.
patent: 5475977 (1995-12-01), Gautier et al.
patent: 5475978 (1995-12-01), Gautier et al.
Butler Douglas C.
Jidosha Kiki Co. Ltd.
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