Booster

Details Booster Booster

1996-03-07

1997-07-29

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

056513003

ABSTRACT:
An improvement of a valve mechanism used in a brake booster is disclosed. A valve element comprises a first and a second annular member, both formed of a metal and which are connected together in an axial orientation, and an elastic deformation which is connected to the rear side of the second annular member. A rubber piece mounted on the first annular member defines a first seat area, and a rubber piece mounted on the second annular member defines a second seat area. With this construction, a spring which is used to urge either seat area of the valve element into seating engagement with the respective valve seat may be compressed to a lower load than in the prior art, thus allowing an input required to initiate the operation of the brake booster to be reduced.

REFERENCES:
patent: 3548718 (1970-12-01), Utton
patent: 4005638 (1977-02-01), Takeuchi
patent: 5027695 (1991-07-01), Inoue et al.
patent: 5046398 (1991-09-01), Hamamiya et al.
patent: 5263399 (1993-11-01), Flory et al.
patent: 5333534 (1994-08-01), Uyama
patent: 5355771 (1994-10-01), Watanabe

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