Hydraulic brake booster

Details Hydraulic brake booster Hydraulic brake booster

1985-10-30

1988-02-16

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60554, 60570, 60582, B60T 1312

Patent

active

047246740

ABSTRACT:
The hydraulic brake booster (12) includes a resilient member (96) disposed between an input member (94, 194, 294) and a pair of valve members (98, 101; 112) which control fluid pressure flow from an accumulator (14). When the input member (94, 194, 294) is actuated by the vehicle operator, theresilient member (96) is compressed so that the input member (94, 194, 294) moves relative to the valve members (98, 101; 112) and thus provides for greater movement of the input member (94, 194, 294) than for the valve members (98, 101; 112). The booster (12) includes a hydraulic or mechanical lockout which, in the absence of fluid pressure from the accumulator (14), eliminates the movement of the input member (94, 194, 294) relative to the valve members (98, 101; 112) so that the relative movement eliminated is not added to the valve stroke during manual operation of the booster (12).

REFERENCES:
patent: 2106304 (1938-01-01), McGee
patent: 3106874 (1963-10-01), Schultz
patent: 4126996 (1978-11-01), Leiber
patent: 4326379 (1982-04-01), Dauvergne
patent: 4490977 (1985-01-01), Fulmer
patent: 4514981 (1985-05-01), Brown
patent: 4569271 (1986-02-01), Reynolds

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