Patent ID: 6193329
Filing Date: 2001-02-27
Classification: B60T,F04B

Abstract:
A brake system comprising:a fluid-pressure generating means for generating a brake fluid pressure in response to a demand for braking;a brake actuating section connected to the fluid-pressure generating means through a brake circuit;a fluid-pressure control means disposed in the brake circuit, for selectively reducing, holding, and building up the brake-fluid pressure of brake fluid in the braking-force actuating section;a reservoir fluidly communicated with a drain circuit into which the brake fluid is exhausted by the fluid-pressure control means during a pressure-reduction operating mode;a housing including a pump which inducts the brake fluid from the reservoir and discharges pressurized brake fluid into the brake circuit, the pump including:a motor which acts as a driving source of the pump;a motor driven shaft having a cam profile disposed in an drive-shaft hole formed in said housing;coaxial pump bores formed in said housing, said pump bores being perpendicular to the motor driven shaft and located on either side of the cam profile;plungers disposed in the pump bores, said plungers having inboard ends thereof in operative engagement with the cam profile so as to reciprocate in response to rotation of the motor driven shaft; and wherein said housing further comprises:a reservoir hole in which said reservoir is housed;mounting bolts which secure said motor to an end face of said housing; andscrew-threaded holes into which said mounting bolts are screwed, said screw-threaded holes being arranged substantially parallel to the motor driven shaft and located at positions close to at least one of the pump bore and the reservoir hole so that an extrapolation of the screw-threaded holes in the direction of the screw threaded holes, is non-intersective with neither the pump bore nor the reservoir hole.