发明名称 |
Jump rope device |
摘要 |
The jump rope device is constructed with a pair of stations disposed in mirror-image facing relation and a pair of ropes which are connected between rotating arms of each station. Each station employs a stepper motor to rotate the radially disposed arms as well as a transmission for rotating the arms in an out-of-phase relation to create a double dutch effect. The end of each rope is secured to a cord which is wound about a rotatable drum within each radial arm so that the length of exposed rope may be adjusted to a user. Should a user step on a rope, the resulting tension in the rope and cord effects an unwinding of the cord from the drum thereby allowing the rope to break away from the arm of the station.
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申请公布号 |
US5961425(A) |
申请公布日期 |
1999.10.05 |
申请号 |
US19980041584 |
申请日期 |
1998.03.12 |
申请人 |
RENSSELAER POLYTECHNIC INSTITUTE |
发明人 |
REID, TAHIRA;BURDICK, ANDREW |
分类号 |
A63B5/20;(IPC1-7):A63B5/20 |
主分类号 |
A63B5/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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