Hydraulic brake booster

Details Hydraulic brake booster Hydraulic brake booster

1978-11-17

1981-08-25

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60545, 60581, 60582, 91391A, B60T 1320

Patent

active

042851998

ABSTRACT:
The invention relates to a hydraulic brake booster for a vehicle brake apparatus which is provided with a pressurizing apparatus which has a pump and a reservoir. When the reservoir pressure fails, a switchover piston which is subject to the reservoir pressure can disengage a stop for the push rod of the control valve.
The push rod is supported on the stop when the pressure supply to the reservoir is intact and after the control valve switches over in the direction of brake activation, in order to give the driver a sense of the added brake force. In the same event, a support of a pedal activation stem on a movable auxiliary cylinder is removed. When the reservoir pressure supply fails, however, this support is made available, in order to enable an immediate mechanical actuation of the main cylinder portion of the brake booster.

REFERENCES:
patent: 3918765 (1975-11-01), Hayashida
patent: 3991573 (1976-11-01), Harries
patent: 4015881 (1977-04-01), Adachi
patent: 4055957 (1977-11-01), Falk
patent: 4149379 (1979-04-01), Shimizu
patent: 4197710 (1980-04-01), Leiber

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