| 发明名称 |
Methods and apparatus for adjusting resistance to exercise |
| 摘要 |
Supplemental weights are disposed above a weight stack and are selectively movable into the path traversed by the top plate in the weight stack. The supplemental weights are maneuvered into and out of storage positions on the frame.
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| 申请公布号 |
US5944642(A) |
申请公布日期 |
1999.08.31 |
| 申请号 |
US19980192857 |
申请日期 |
1998.11.16 |
| 申请人 |
KRULL, MARK A. |
发明人 |
KRULL, MARK A. |
| 分类号 |
A63B21/062;(IPC1-7):A63B21/062 |
主分类号 |
A63B21/062 |
| 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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