Patent ID: 6564553
Filing Date: 2003-05-20
Classification: B60T

Abstract:
A braking pressure intensifying master cylinder comprising:a housing; an input shaft penetrating through the housing and traveling by input applied in braking maneuver; a control valve controlled by said input shaft to regulate a fluid pressure of a fluid pressure source to develop a fluid pressure corresponding to said input; a pressurized chamber connected to the control valve for receiving the fluid pressure regulated by said control valve; a master cylinder piston which is actuated by the fluid pressure supplied into the pressurized chamber to develop a master cylinder pressure; biasing means operationally connected to the control valve for biasing the control valve in a direction opposite to an operational direction of the input shaft; and means situated in the housing and integrally formed with the control valve, said means traveling relative to the housing such that a force produced by the fluid pressure regulated by said control valve and the biasing force of said biasing means are balanced; wherein said input shaft travels according to a travel of the means travelling relative to the housing, and said control valve is biased by a force of the biasing means in the direction opposite to the operational direction of the input shaft and is urged by the fluid pressure regulated by the control valve in the operational direction of the input shaft.