Brake booster having a reaction force mechanism
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United States of America Patent
Stats
-
Jun 1, 1999
Grant Date -
N/A
app pub date -
Sep 30, 1997
filing date -
Oct 25, 1996
priority date (Note) -
Expired
status (Latency Note)
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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.
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