Jidosha Kiki Co., Ltd.

Syusaku Chiba

Kunio Yanagi

An object of the present invention is to provide a master cylinder which decreases the number of necessary parts, achieves easy assembly and stabilized quality, and surely prevents a float from coming off. In the present invention, the master cylinder tank 20 contains working fluid in the interior of a tank body 21 and incorporates a float 25 movable vertically in response to the increase and decrease in the working fluid by being guided by a float guide 22, and coming-off preventive portions 24, 24, capable of being deformed elastically, are provided to cover at least a part of the float 25 by extending a part of the float guide 22 upward beyond a guide rib 23. The coming-off preventive portions 24, 24 are formed by being bent to the inside into a shape such as to partially cover the float 25, so that the float 25 is prevented from coming off by the coming-off preventive portions 24, 24.

Master cylinder tank

An inlet union for master cylinder of the present invention is so constructed that a flange portion is disposed at the periphery of a duct member, a circular raised portion whose outside diameter is smaller than that of the flange portion is integrally formed, at least one convex portion protruding radially is disposed at the outer periphery of the circular raised portion, attaching holes for the duct members are disposed in the top plate of an attaching cover, a plurality of concave portions corresponding to the convex portion of circular raised portion of the flange portion are disposed at the inner periphery of the attaching hole so that the convex portion of the duct member selectively engages with the concave portion of the attaching cover, and a mounting portion is formed at the inner periphery of the attaching cover to mount the outer periphery of the flange portion.

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Saitama, Japan

Syusaku Chiba