Brake pressure controller

Claim 1

A brake pressure controller comprising: a hydraulic circuit block defining an open side; a plurality of pumps mounted in said hydraulic circuit block; a plurality of pressure regulating solenoid valves, mounted in said hydraulic circuit block, wherein each of said solenoid valve for controlling wheel brake pressure by opening and closing a fluid passage through said each solenoid valve; a direct current electric motor, received in said open side of said hydraulic circuit block, for driving said plurality of pumps, said direct current electric motor including a rotor shaft having a first end supported in said hydraulic circuit block and an unsupported second end, a rotor mounted on said rotor shaft and having a core carrying a winding, and a commutator mounted on said rotary shaft adjacent said second end of said rotary shaft; first and second bearings provided on a portion of said rotor shaft adjacent said first end of said rotor shaft, said first and second bearings supporting said rotor on said hydraulic circuit block at two spaced points which are located further away from said second end of said rotor shaft than said core, wherein said plurality of pumps engage said rotary shaft between said first and second bearings; a control block directly connected to said hydraulic circuit block so as to close said open side of said hydraulic circuit block, said control block including a built-in electronic control circuit for outputting drive signals to said solenoid valves and said motor; a brush holder secured to said control block; and a feeding brush inserted in said brush holder, said feeding brush contacting said commutator and being electrically connected to said electronic control circuit by a conductor extending from said brush holder, wherein said hydraulic circuit block, said electric motor and said control block are joined together as a one-piece unit.