Brake booster with hydraulic ratio changer

Details Brake booster with hydraulic ratio changer Brake booster with hydraulic ratio changer

1975-07-10

1976-11-02

Maslousky, Paul E.

Motors: expansible chamber type

With alternative manual actuation of load

Alternate pedal positions

91460, 91468, F15B 1310

Patent

active

039889670

ABSTRACT:
A motor vehicle fluid power circuit is provided with a constant displacement pump, a control valve, an open center steering valve, a hydraulic ratio type brake booster, and a ratio override valve. The control valve includes a shuttle piston which controls fluid flow between the pump and the brake booster, between the pump and the steering valve, and between the brake booster working chamber and the downstream side of the steering valve. The brake booster includes a trapped volume chamber in which a larger area input rod moves to provide greater movement of an output rod and power piston assembly.

REFERENCES:
patent: 3818705 (1974-06-01), Thomas
patent: 3831491 (1974-08-01), Thomas
patent: 3838629 (1974-10-01), Meyers

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