Patent ID: 6305243
Filing Date: 2001-10-23
Classification: B62M,Y10T

Abstract:
A bicycle crank arm comprising:a rod-shaped main body having first and second ends;an axle fastening member fastened to the first end of said main body;a pedal fastening member fastened to the second end of said main body; anda cover body made of a carbon fiber material encasing all of said main body, said axle fastening member, and said pedal fastening member;said main body is provided at its first end with a first male threaded portion, and at the second end thereof with a second male threaded portion;said axle fastening member is provided with a female threaded portion which is engaged with the first male threaded portion of the main body, said axle fastening member includes an external surface with a plurality of protrusions that are anchored to the cover body; andthe pedal fastening member is provided with a female threaded portion which is engaged with second male threaded portion of the main body, and the pedal fastening member includes an external surface with a plurality of protrusions that are anchored to the cover body.