Hydraulic brake booster

Details Hydraulic brake booster Hydraulic brake booster

1978-10-03

1980-04-15

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Pulsator

60581, 60582, 60585, B60T 1300

Patent

active

041977106

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 (accumulator). 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 this manner, a stop for the brake pedal, which activates the push rod is formed which is subject solely to the resiliency of a travel-limiting spring. The stop operates when reservoir pressure is available to effect a longer pedal stroke. When the reservoir pressure fails, it is automatically disengaged.

REFERENCES:
patent: 3978667 (1976-09-01), Ohara
patent: 4034566 (1977-07-01), Suketomo

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