| 摘要 |
PROBLEM TO BE SOLVED: To quickly and easily fill brake fluid to a power chamber formed in a rear side of a master piston in a hydraulic brake device for vehicle with hydrauic boosting means. SOLUTION: In this device, a control piston 30 exposing its rear side to a pressure chamber R4 and forming a regulator chamber R6 in its front side is liquid-tightly and freely slidably stored in the front of a master piston 20 inside a cylinder body 1, being arranged to interlocking to the master piston 20. Brake fluid pressure outputted via a regulator RG is applied to a power chamber R1 to assist energization of the master piston. Sealing members 81, 82 are disposed in both sides of a drain chamber R7 communicating to a reservoir 4 as a unidirectional valve means allowing only a flow of brake fluid from a reservoir 4 side of a pressure-reducing valve means (sleeve valve mechanism 50) of the regulator RG to the power chamber R1. |
