| 摘要 |
A method and apparatus for improving the rolling efficiency of a wheel (10) includes a circular frame (12) capable of rolling along a rolling surface, a rolling assembly (15) for causing the circular frame (12) to rotate, and a shock absorbing means (26) connecting the rolling assembly (15) and the circular frame (12) wherein the circular frame (12) maintains a substantially rounded area of contact with the rolling surface. |
