Brake booster

Details Brake booster Brake booster

1990-09-27

1992-04-21

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 91377, 91443, F15B 910

Patent

active

051057212

ABSTRACT:
A brake booster includes a housing in which a constant-pressure chamber and a variable-pressure chamber are defined by a power piston. An input rod is operatively connected to one end of the power piston and receives an input force. A valve is provided in the power piston and operatively connected to the input piston so as to open upon receipt of the input force in such a manner that the differential pressure between the chambers moves the power piston. An output rod is operatively connected to the other end of the power piston. A wall member is provided across which a first auxiliary chamber at a side of the variable-pressure chamber and a second auxiliary chamber formed at a slide of the constant pressure are formed. An orifice passage connects the variable pressure chamber and the first auxiliary chamber.

REFERENCES:
patent: 3289547 (1966-12-01), Kytta
patent: 3517588 (1970-06-01), Kytta
patent: 3923427 (1975-12-01), Uyeda
patent: 4147179 (1979-04-01), Miura
patent: 4494445 (1985-01-01), Furuta et al.
patent: 4882980 (1989-11-01), Arino et al.
patent: 4967644 (1990-11-01), Ellenberler
patent: 4979426 (1990-12-01), Schiel et al.

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