Hydraulic booster device with valve means for damping of input r

Details Hydraulic booster device with valve means for damping of input r Hydraulic booster device with valve means for damping of input r

1991-01-11

1992-02-11

Look, Edward K.

Motors: expansible chamber type

With motive fluid valve

For exhausting contracting working chamber to expanding...

91443, 60533, 60574, 60591, F15B 1108, F15B 1304, B60T 1504

Patent

active

050866885

ABSTRACT:
The hydraulic booster device for a brake circuit, comprises a body (30) pierced with a bore (32), in which slide coaxially a pusher (25) controlled by a brake pedal and a piston means (34) located between first (5) and second (33) chambers containing a brake fluid, the first chamber (5) receiving at least one spring (51, 52) which loads the pusher (25) and the piston means (34) away from one another, the first (5) and second (33) chambers being connected respectively to sources of fluid under low pressure (11) and under high pressure (13) by valve mechanism (15). An auxiliary chamber (4) of a volume variable as a function of the position of the pusher (25m), made in the bore (32), communicates with the first chamber (5), on the one hand permanently by way of a restriction (6) and on the other hand by an auxiliary valve mechanism (3) allowing communication during an increased in the volume of the auxiliary chamber (4) and preventing it during a reduction of the latter.

REFERENCES:
patent: 2814364 (1957-11-01), Lowe
patent: 3168812 (1965-02-01), Randol
patent: 4278009 (1981-07-01), Demido
patent: 4428567 (1984-01-01), Fournales
patent: 4475635 (1984-10-01), Iwata et al.
patent: 4558767 (1985-12-01), Taylor
patent: 4588054 (1986-05-01), LaBaron
patent: 4656924 (1987-04-01), Chatterjea
patent: 4858438 (1989-08-01), Douillet et al.
patent: 4938324 (1990-07-01), Van Dyke
patent: 4998950 (1991-03-01), Derrick

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