The booster attaching brake which has the decompression piston which has become the primary piston of the master cylinder as one unit

摘要

Solutions As for this invention, the booster, by fee Ra and the reaction disk the primary piston of the master cylinder (54) in order it is reset elastically in the booster attaching brake which can operate, the spring (70) by, the decompression piston which two radial divergences (64) it has at least (62), following to the strength of input, differs, to offer two boost ratios, the primary piston of the master cylinder (54) the booster attaching brake which features that it is installed is offered.