Bicycle wheel has a metal rim joined to a hub by a hollow injection molded plastic disc or spoked part

摘要

A rim and hub(4) are joined together by a plastic connecting part comprising a one-piece hollow disc or spoked molding which is open to the radially outer side. A rim and hub(4) are joined together by a plastic connecting part comprising a one-piece hollow disc or spoked molding which is open to the radially outer side. The disc or spoked member(1) partially or completely surrounds the hub(4) and the length and breadth of the cross-section of hollow chambers(7) inside the spoked member remain constant or increase from the hub towards the rim. Axial breadth of a chamber cross-section increasing from the hub to the rim may alternatively decrease. An Independent claim is made for an injection molding process for manufacturing the wheel in an axially divided tool.