Patent ID: 6089359
Filing Date: 2000-07-18
Classification: B60T,F16D

Abstract:
A brake device comprising:a main piston slidably mounted within a caliper body of said brake device;a cylinder body provided inside an inner periphery of said piston;a sealed fluid chamber which is formed by said cylinder body and an inner peripheral surface of said main piston, and is filled with a fluid;a shaft rotatably mounted on said cylinder body;pressure control pistons driven by said shaft to move into and out of said fluid chamber;a linear movement conversion mechanism provided between said shaft and each of said pressure control pistons so as to convert a rotation of said shaft into a linear movement of said pressure control pistons;a motor for rotating said shaft;a speed changer provided between said shaft and said motor so as to transmit the number of revolutions of said motor to said shaft in a manner to reduce said number of revolutions; andan electronic control unit (ECU) for controlling said motor.