Reaction device for brake booster

Details Reaction device for brake booster Reaction device for brake booster

2005-08-23

2005-08-23

Lopez, F. Daniel (Department: 3745)

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

Reexamination Certificate

active

06931979

ABSTRACT:
A reaction device wherein a ratio of input force to output force for a brake booster is sequentially changed during a brake application. An actuation force derived from a pressure differential acts on a movable wall and is communicated through a cage as an output force to an push rod. The output force is a functional ratio of the input force as modified by a reaction disc and elastic means during a brake application. The reaction device functions as a rigid member until the input force reaches a first predetermined level Fd and a first boost ratio is in effect until a second predetermined force Fe is reached and a second boost ratio is in effect until a third predetermined input force level Ff is reached and a third boost ratio is in effect until a fourth predetermined fource level is reached.

REFERENCES:
patent: 4719842 (1988-01-01), Gautier
patent: 4813338 (1989-03-01), Mortimer et al.
patent: 5012723 (1991-05-01), Gauthier
patent: 5699713 (1997-12-01), Mortimer
patent: 5893316 (1999-04-01), Inoue et al.
patent: 6334384 (2002-01-01), Hoerner

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