Patent ID: 6164184
Filing Date: 2000-12-26
Classification: B60T

Abstract:
In a booster including a valve body slidably disposed within a shell, a power piston mounted on the valve body, a constant pressure chamber and a variable pressure chamber defined adjacent opposite sides of the power piston, a valve mechanism disposed in the valve body, an input shaft connected to an operating rod for driving a valve plunger, which forms the valve mechanism, back and forth to switch a flow path in the valve mechanism, and an output shaft driven forward as the valve body is driven forward;a reaction mechanism for the booster comprising a pseudo-reaction imparting means which prevents a reaction applied to the output shaft from being transmitted to the valve plunger when the booster is operative and which imparts a pseudo-reaction which depends on a travel of the input shaft, the input shaft being coupled to a pedal through a clevis and a clevis pin, an elastic member which defines the pseudo-reaction imparting means being disposed between at least one of the clevis and clevis pin and part of the car, wherein said elastic member is a plurality of springs.