| 摘要 |
<p>The driver and sprocket can be formed as a single piece. The present invention provides a hub design that is cost-effective, provides improved functionality, and eliminates certain of the deficiencies inherent in existing designs. Various embodiments of the present invention overcome many of the disadvantages associated with the prior art. To overcome these disadvantages, the applicant has developed a new hub based on the traditional "coaster brake" with some significant modifications.</p> |
