Hydraulic power brake booster

Details Hydraulic power brake booster Hydraulic power brake booster

1978-10-02

1980-06-24

Hershkovitz, Abraham

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

60548, 60554, 91391R, F15B 910

Patent

active

042089506

ABSTRACT:
A hydraulic brake booster having a mechanical ratio changing mechanism between the booster input rod and one of the booster valve control members. The mechanism includes reaction levers pivotally mounted on the input valve control member and on a support member so that in normal booster operation the levers operate to move the input valve control member at a faster rate than the input rod, while the levers pivot to permit direct mechanical transmission of force from the input rod through the booster when no power or insufficient power is available to operate the booster.

REFERENCES:
patent: 2826042 (1958-03-01), Rike
patent: 3209657 (1965-10-01), Randol
patent: 4107926 (1978-08-01), Adachi
patent: 4110985 (1978-09-01), Gordon
patent: 4148247 (1979-04-01), Schubert

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