Hydraulic brake booster

Details Hydraulic brake booster Hydraulic brake booster

1975-06-10

1977-03-29

Cline, William R.

Power plants

Pressure fluid source and motor

Pulsator

91 31, 91376R, F15B 700

Patent

active

040141713

ABSTRACT:
A hydraulic brake booster includes a housing having a bore therein, a stepped power piston slidably disposed within the bore and forming at one side thereof a fluid chamber, a first passage communicating with a fluid pressure source, a second passage communicating with the fluid chamber, a third passage communicating with a reservoir, a first valve normally interrupting the communication between the first passage and the fluid chamber, and a second valve for controlling the communication between the fluid chamber and the third passage.
The first passage is provided within the small diameter portion of the stepped power piston for reducing the sliding resistance force exerted upon the stepped power piston during the sliding movement thereof.

REFERENCES:
patent: 3712057 (1973-01-01), Aiki
patent: 3834277 (1974-09-01), Yabuta et al.
patent: 3926093 (1975-12-01), Nakagawa

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