Power-operated boosters

Details Power-operated boosters Power-operated boosters

1981-04-23

1984-02-28

Maslousky, Paul E.

Power plants

Pressure fluid source and motor

Pulsator

60581, 91378, B60T 1300

Patent

active

044335431

ABSTRACT:
A booster for a vehicle braking system has an input piston, a boost piston and an output piston working a bore, the boost piston being advanced in the bore in response to pressure fluid from a source pressurizing a boost chamber under control of a valve.
The operation of the valve is dependent on the pressure in the system, and the valve has a valve mechanism working in a bore in the boost piston of which one part has a pressure-responsive face, the valve being operative, on initial movement of the input piston to cause pressurization of the braking system to the threshold level, and application of pressure fluid to the pressure-responsive face to move the part relative to the input piston to place the boost chamber in communication with the pressure source. Threshold pressurization of the braking system may be achieved by pressurization of the boost chamber, or an auxiliary chamber forward of the boost piston to a predetermined level.

REFERENCES:
patent: 3817152 (1974-06-01), Viron
patent: 3819021 (1974-06-01), Schacher et al.
patent: 3988967 (1976-11-01), Przel
patent: 4024713 (1977-05-01), Ueda
patent: 4225022 (1980-09-01), Belart
patent: 4341076 (1982-07-01), Steffes

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