Bicycle crank arm and method of making same

Invention Grant

US06508002B1 Bicycle crank arm and method of making same 失效

Title translation: 自行车曲柄臂及其制作方法

Please log in to see more content

Patent Title: Bicycle crank arm and method of making same
Patent Title (中): 自行车曲柄臂及其制作方法
Application No.: US09717010

Application Date: 2000-11-22
Publication No.: US06508002B1

Publication Date: 2003-01-21
Inventor: Douglas Chiang
Applicant: Douglas Chiang
Main IPC: B21D5388
IPC: B21D5388

Bicycle crank arm and method of making same

Abstract:

A method of making a bicycle crank arm bar by casting, forging, rolling, heat molding, and cold forging. The bicycle crank arm has an elongated cavity, an axle end, and a pedal end.

Abstract(Chinese):

通过铸造，锻造，轧制，热成型和冷锻制造自行车曲柄臂杆的方法。自行车曲柄臂具有细长的空腔，轴端和踏板端。

Information query

Espacenet