Brake booster having a reaction force mechanism

Details Brake booster having a reaction force mechanism Brake booster having a reaction force mechanism

1997-09-30

1999-06-01

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

059079908

ABSTRACT:
An improvement of a reaction transmitting mechanism for a booster is disclosed. A spring charged to a preset load is disposed between a stepped end face of value body and a plunger plate to urge the latter forwardly. This separates the plunger plate and a value plunger from each other in the inoperative condition of the booster. As an input shaft is driven forward to operate the booster, a reaction disc bulges into abutment against the plunger plate. Subsequently when the spring is compressed, the plunger plate abuts against the value plunger, which defines a jumping point. From this point on, a reaction from the output is transmitted to a driver. Since the output upon the jumping is determined by the preset load to which the spring is charged, a variation in the output upon jumping is minimized for any variation in the hardness of the reaction disc.

REFERENCES:
patent: Re26487 (1968-11-01), French
patent: 3110031 (1963-11-01), Price
patent: 4572055 (1986-02-01), Schiel
patent: 4719842 (1988-01-01), Gautier
patent: 4756231 (1988-07-01), Kobayashi et al.
patent: 5425302 (1995-06-01), Levrai et al.
patent: 5609087 (1997-03-01), Horikoshi

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