| 主权项 |
1. A brake booster input rod, comprising:
a front end portion to which an input piston (18) of a brake booster (B) is connected; a rear end portion to which a yoke (53) connected with to a brake pedal (P) is attached; and an annular boot installing groove (47) formed on an outer circumferential surface of a middle portion of the input rod (20), so that, when a boot (32) covers a front portion of the input rod (20), the boot installing groove (47) is engaged with a rear end bead portion (32a) of the boot (32) with a fastening margin, wherein, through rolling, two annular groove portions (44, 45) are formed side by side on an outer circumferential surface of the input rod (20) along an axial direction thereof to each have a triangular section, and an annular ridge portion (46) are risen between the groove portions (44, 45) to have a triangular section; and wherein the ridge portion (46) functions as a rear side wall of the boot installing groove (47). |
