Patent ID: 8746811

Claim:
A brake fluid pressure control device comprising: an electromagnetic booster valve, which is provided in a main flow path that is extended from a mater cylinder up to a wheel cylinder to open and close the main flow path; an electromagnetic control valve, which is provided on the master cylinder side than the electromagnetic booster valve in the main flow path, and which have a flow path cutoff function; an electromagnetic decompression valve, which is provided in a decompression path that is connected to the wheel cylinder; a pump, which includes an intake port connected to an intake path communicating with a main reservoir and connected to the wheel cylinder through the electromagnetic decompression valve, the pump being driven by a motor; and an electronic control unit, which controls operations of the electromagnetic control valve, the electromagnetic booster valve, the electromagnetic decompression valve, and the pump, wherein the electromagnetic control valve, the electromagnetic booster valve, the electromagnetic decompression valve, and the pump are incorporated in a single housing, and wherein, based on a command from the electronic control unit, the pump draws up at least one of brake fluid, which is supplied from the main reservoir, and brake fluid, which is discharged from the wheel cylinder, and then the pump returns the drawn brake fluid to an area that extends from the electromagnetic control valve of the main flow path up to the electromagnetic booster valve; and a fluid reservoir, which communicates with both the decompression path and an intake port of the pump, and which is arranged inside the housing so that the brake fluid in the fluid reservoir flows toward the intake port of the pump by gravity.