Brake booster

Details Brake booster Brake booster

1989-03-22

1991-04-09

Look, Edward K.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

913691, 913692, 91376R, F01B 2502

Patent

active

050054643

ABSTRACT:
An open/close valve which opens or closes a passage providing a communication between a valve mechanism and a constant pressure chamber of a brake booster is disclosed. The valve comprises a valve seat formed in surrounding relationship with a passage, a valve element disposed within a casing which is mounted on the valve body so as to be reciprocably movable therein, and a pressure chamber defined within the casing for urging the valve element toward the valve seat. Pressure fluid supply means supplies a pressure fluid into the pressure chamber from the outside of a shell to cause the valve element to be seated upon the valve seat. As compared with the solenoid-operated valve, an axial size of the open/close valve can be reduced while avoiding any heating effect.

REFERENCES:
patent: 3127966 (1964-04-01), Sheriff et al.
patent: 4759255 (1988-07-01), Shimamura

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