Hydraulic brake booster

Details Hydraulic brake booster Hydraulic brake booster

1974-07-29

1976-05-25

Schwadron, Martin P.

Power plants

Pressure fluid source and motor

Pulsator

60556, 60589, 91391R, 91434, 188347, B60T 1320

Patent

active

039584232

ABSTRACT:
In a hydraulic brake booster, wherein a body, to which is coupled a master cylinder, is provided with a projecting portion extending outwardly towards the master cylinder; a power piston adapted to operate the piston of the master cylinder extends through the projecting portion to define a working chamber positioned on the side remote from the master cylinder; a pressure chamber, to which is introduced a pressure fluid from a pressure source, is provided in the middle portion of the body; and a first valve which is normally closed for controlling the communication of the pressure chamber with the working chamber and a second valve which is normally open for controlling the communication of the working chamber with a reservoir are operated by means of a valve stem member and an input shaft adapted to operate the valve stem member; the improvement in which a stop slidingly provided within the pressure chamber and adapted to receive pressure from the pressure chamber in the direction opposite to the moving direction of the input shaft at the time of operation of the hydraulic brake booster for limiting the movement of the input shaft.

REFERENCES:
patent: 1958722 (1934-05-01), Sinclair et al.
patent: 2410269 (1946-10-01), Chouings
patent: 3075499 (1963-01-01), Prather
patent: 3106874 (1963-10-01), Schultz
patent: 3115067 (1963-12-01), Ayers, Jr.
patent: 3252382 (1966-05-01), Kellogg et al.
patent: 3253409 (1966-05-01), Kellogg et al.
patent: 3298177 (1967-01-01), Kellogg
patent: 3798905 (1974-03-01), Tennis
patent: 3845693 (1974-11-01), Meyers

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