发明公开
- 专利标题： Racket for playing a game with a ball
- 专利标题（中）： 用球打篮球的角球
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申请号： EP88112740.1申请日： 1988-08-04
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公开(公告)号： EP0317711A3公开(公告)日： 1990-05-16
- 发明人: Karasek, Mark L
- 申请人： WILSON SPORTING GOODS COMPANY
- 申请人地址： 2233 Grove Street River Grove Illinois 60171 US
- 专利权人： WILSON SPORTING GOODS COMPANY
- 当前专利权人： WILSON SPORTING GOODS COMPANY
- 当前专利权人地址： 2233 Grove Street River Grove Illinois 60171 US
- 代理机构： Hiebsch, Gerhard F., Dipl.-Ing.
- 优先权： US79991 19870804
- 主分类号： A63B49/00
- IPC分类号： A63B49/00 ; A63B59/00
摘要：
The stiffness of a tennis racket is adjusted so that the first mode of bending of the racket under free-free constraint conditions is between 170 Hz and 250 Hz preferably between 200 Hz and 210 Hz. The second mode of bending under clamped-free constraint conditions is between 215 Hz and 315 Hz and preferably between 230 Hz and 265 Hz.
公开/授权文献
- EP0317711B1 Racket for playing a game with a ball 公开/授权日：1992-12-09
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