Nissin Kogyo Co., Ltd.

Nissin Kogyo Kabushiki Kaisha

Chiseki Kaneko

Takayoshi Shinohara

Junichi Komiyama

A booster,and a hydraulic pressure master cylinder,are disposed so as to be inclined upward of a vehicle body by an angle &thgr; with respect to a line L,extending along the longitudinal direction of the vehicle body. The front surface plate,of the booster,is provided at the upper side of the vehicle body with the low strength portion,. A first notched portion,is provided at the upper side of the reinforcement plate,so as to open at the outer peripheral edge thereof. The lower side of the reinforcement flange,of the reinforcement plate,is partially removed to form a second notched portion,. When external force is applied to the hydraulic pressure master cylinder,from the front direction of the vehicle body, the low strength portion,and the first and second notched portions,serve to easily incline the hydraulic pressure master cylinder,to the upper direction of the vehicle body.

Hydraulic pressure generating apparatus for vehicle

In a tandem type booster, the inner peripheral end of a front booster piston and the inner peripheral bead of a front diaphragm are clamped between a front end of a sleeve fitted over an outer periphery of the piston boss and a flange provided on the piston boss, so that they are connected to a front portion of the piston boss, and a rear booster piston and the piston boss are coupled to each other in a bayonet manner by retaining pawls formed on a inner peripheral end of a rear booster piston and retaining grooves provided in the outer periphery of the piston boss. The rear booster piston, the sleeve and the piston boss are engaged with one another while preventing relative rotation therebetween, and an inner peripheral bead of a rear diaphragm is clamped between the rear booster piston and a set ring and connected to a rear portion of the piston boss. Therefore, even if the set ring should be removed, the rear booster piston and the piston boss coupled to each other in the bayonet manner cannot be immediately separated, thereby ensuring that the coupling of the front and rear booster pistons with the sleeve is maintained.

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Nagano, Japan

Chiseki Kaneko