| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce cup seal consuming phenomenon by making loading direction from a push rod always agree with the center shaft of a piston when operating a master cylinder, so as to excellently move the piston inside a cylinder hole. <P>SOLUTION: A bottom part of a push rod housing hole 3c is provided with a spherical recessed part 3d, and a tip part of the push rod 5 is provided with a spherical projecting part 5a having diameter smaller than that of the spherical recessed part 3d. A push point P where the spherical projecting part 5a abuts on the spherical recessed part 3d to push it when the push rod 5 pushes the piston 3, is provided on the center shaft CL of the piston near the bottom part side large-diameter flange part 3b. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
