发明名称 Bicycle crank arm assembly
摘要 A bicycle crank arm assembly is provided with a bicycle crank arm with a first end configured to be coupled to an axle of a bottom bracket and a second end with a pedal attachment bore for receiving a bicycle pedal shaft. A tubular member is press fitted into the bore of the bicycle crank arm. The tubular member has an external circumferential with serrations that is surface non-releasably press fitted into the pedal attachment bore of the bicycle crank arm, and an internally threaded surface adapted to be coupled to the bicycle pedal shaft. The crank arm preferably has a counterbore at one axial end of the pedal attachment bore with a washer disposed therein such that the washer partially overlaps the tubular member.
申请公布号 US7503239(B2) 申请公布日期 2009.03.17
申请号 US20030354115 申请日期 2003.01.30
申请人 SHIMANO INC. 发明人 YAMANAKA MASAHIRO
分类号 B62M3/00;B23Q1/48;B25G3/00;F16B7/08 主分类号 B62M3/00
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