Hydraulic brake booster with cam and lever ratio changer

Details Hydraulic brake booster with cam and lever ratio changer Hydraulic brake booster with cam and lever ratio changer

1985-12-09

1987-11-10

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60594, 91369B, 91382, B60T 1320

Patent

active

047048670

ABSTRACT:
The brake booster (12) includes a housing (30) with at least one piston (38) disposed in a bore (32) between a pressure chamber (42) and a work chamber (76). The piston (38) is disposed adjacent a valve housing (79) containing therein a valve assembly (80) and the valve assembly (80) is connected to an input assembly (72) at an end of the valve housing (79). The piston (38) includes a cam surface (78) engaged by a lever (17), the lever (17) abutting an actuator part (81) biased by a resilient spring (83) toward the lever (17). Actuation of the booster (12) effects a greater displacement of the piston (38) than the input assembly (72) and valve housing (79) because of the engagement of the lever with the cam surface (78) of the piston (38).

REFERENCES:
patent: 4200001 (1980-04-01), Kytta
patent: 4283992 (1981-08-01), Wilson
patent: 4416188 (1983-11-01), Katagiri
patent: 4490977 (1985-01-01), Fulmer
patent: 4548037 (1985-10-01), Farr

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