发明名称 |
Methods and devices for sport ball training |
摘要 |
Sport ball training devices and methods for releasably holding a tennis ball or other sport ball at an appropriate height for the practice of striking the ball, either directly or indirectly with a racket or the like. An embodiment may have a support device with a base and an adjustable vertical tubular assembly for the support of a transverse arm from which a ball sling is suspended. A retainer member of the ball sling circumferentially holds a sport ball. An embodiment of the retainer member may be made from an elastometric material that lightly squeezes the ball with sufficient force to restrain it, but releases easily when the ball is hit so that the trajectory of the ball is not affected by the presence of the retainer member nor is the racquet significantly affected by the presence of the ball sling generally.
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申请公布号 |
US2005113193(A1) |
申请公布日期 |
2005.05.26 |
申请号 |
US20040895534 |
申请日期 |
2004.07.21 |
申请人 |
WARDLE JOHN L.;JENSEN JAMES M. |
发明人 |
WARDLE JOHN L.;JENSEN JAMES M. |
分类号 |
A63B;A63B69/00;A63B69/38;(IPC1-7):A63B69/38 |
主分类号 |
A63B |
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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