| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Portable verticle jump measuring device | US797395 | 1997-02-10 | US5838638A | 1998-11-17 | Steven M. Tipton; Matt Hackworth; Kelly Willson |
| A method to measure height of a vertical jump of a jumper. At least one switch is deactivated by the jumper stepping thereon. The switch is initially activated by the jumper jumping upward therefrom and thereafter deactivated upon return. A time period is measured while the switch is activated. The square of the activated time period is calculated and thereafter the result is multiplied by a constant to derive vertical jump height. Finally, the resultant vertical jump height of the jump is displayed. | ||||||
| 22 | Aerobic skipping exercise device | US197521 | 1988-05-23 | US4813665A | 1989-03-21 | Jim L. Carr |
| An exercise apparatus for aerobic conditioning of a person having a flexible rod over which the person must jump in accordance with a rhythmic cadence. A variable speed control device controls the speed of movement of the rod. A light beam may be utilized to replace the flexible rod. The user jumps onto a shock absorbing medium to reduce the shock to the exoskeleton system. | ||||||
QQ群二维码
意见反馈
意见反馈