Patent ID: 7237851

Claim:
A brake hydraulic pressure control unit comprising a housing, a pump mounted in said housing, a reservoir positioned to receive hydraulic fluid discharged from a hydraulic circuit, and hydraulic pressure control valves, said pump being operated to draw hydraulic fluid in said reservoir and return the thus drawn fluid into said hydraulic circuit, said hydraulic pressure valves being adapted to selectively discharge fluid in said hydraulic circuit into said reservoir, thereby controlling brake hydraulic pressure, said reservoir defined by a fluid chamber formed in a casing which is separate from said housing and which includes a connecting portion mounted to said housing, wherein said casing is held stationary relative to said housing, said casing forming a passage extending through the connecting portion and into the housing, for communicating the fluid chamber with the pump, the brake hydraulic pressure control unit including at least one additional reservoir having a different capacity from said reservoir mounted to said housing, wherein said at least one additional reservoir is not mounted to said housing but can be mounted to said housing instead of said reservoir mounted to said housing, wherein said reservoir mounted to said housing and said at least one additional reservoir have common connecting portions at which said reservoir mounted to said housing is connected to said housing and said at least one additional reservoir can be connected to said housing.