Invention Application
US20070067993A1 Lightweight bicycle wheel rim and method for producing it 失效
轻型自行车轮辋及其制造方法

  • Patent Title: Lightweight bicycle wheel rim and method for producing it
  • Patent Title (中): 轻型自行车轮辋及其制造方法
  • Application No.: US11525438
    Application Date: 2006-09-22
  • Publication No.: US20070067993A1
    Publication Date: 2007-03-29
  • Inventor: William Shook
  • Applicant: William Shook
  • Main IPC: B21K1/38
  • IPC: B21K1/38
Lightweight bicycle wheel rim and method for producing it
Abstract:
A method for producing a bicycle wheel rim is disclosed. The method involves extruding a thin-walled, hollow body having the cross-sectional shape of the rim and an integral external tab. The walls of the hollow body are sufficiently thin that a length of the hollow body without the external tab is subject to buckling when roll formed to produce a rim. The tab is so positioned and sized that the hollow body with the integral external tab is not subject to buckling when roll formed. A portion of the extrusion is then rolled to a circular shape; the circular portion is cut from the extrusion; the free ends are connected, and the external tab is removed.
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