Negative pressure type booster

Details Negative pressure type booster Negative pressure type booster

2006-07-25

2006-07-25

Lazo, Thomas E. (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

Reexamination Certificate

active

07080588

ABSTRACT:
A negative pressure type booster includes a power piston, a slide valve, and a holding mechanism, among others, and assists a driver during emergency braking. The holding mechanism is adapted to hold the slide valve at a predetermined frontward position, and includes a latch member that is mounted to the power piston in such a manner as to be linearly movable in a radial direction, and a garter spring for biasing the latch member radially inward. The latch member has a hook that can be engaged with and disengaged from a hook provided on the slide valve. When a plunger moves frontward relative to the power piston by a quantity greater than a predetermined value, a push slope provided on the plunger pushes a passive slope provided on the latch member radially outward, whereby the hook of the latch member is disengaged from the hook of the slide valve.

REFERENCES:
patent: 5483866 (1996-01-01), Schluter
patent: 6334383 (2002-01-01), Tsubouchi et al.
patent: 6467390 (2002-10-01), Harth et al.
patent: 6715401 (2004-04-01), Takasaki et al.
patent: 6755116 (2004-06-01), Tsubouchi et al.
patent: WO 01/32488 (2001-05-01), None

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