| 摘要 |
A treadmill exercising device comprising first and second spaced apart rollers mounted on a frame so that they are each rotatable with respect to a horizontal axis. An endless belt extends around and between the rollers and includes an upper walking belt portion which slides upon a smooth, highly polished, heat resistance support surface as a person walks on the upper walking belt portion. Additional features are provided for varying the speed of the belt and for maintaining the proper tension in the same. To vary the speed, removable sprockets of different size are provided. The treadmill is operated by an electric motor which is directly connected to a knurled or serrated drive roller to prevent belt slippage.
|
