发明授权
- 专利标题: Golf club
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申请号: US15156593申请日: 2016-05-17
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公开(公告)号: US09757625B2公开(公告)日: 2017-09-12
- 发明人: Takashi Nakano
- 申请人: DUNLOP SPORTS CO. LTD.
- 申请人地址: JP Kobe-shi, Hyogo
- 专利权人: DUNLOP SPORTS CO. LTD.
- 当前专利权人: DUNLOP SPORTS CO. LTD.
- 当前专利权人地址: JP Kobe-shi, Hyogo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2015-115245 20150605
- 主分类号: A63B53/00
- IPC分类号: A63B53/00 ; A63B53/10
摘要:
A golf club 2 includes a shaft 6 having a weight of 50 g or less. The shaft 6 has a ratio of a center of gravity of 0.54 or greater. Respective EI values measured at intervals of 100 mm from a point 130 mm distant from a tip end Tp are defined as E1 to E10. A first region, a second region, and a third region are defined by boundaries at respective points having distances of 230 mm and 830 mm from the tip end Tp. In a graph on which the EI values are plotted, gradients of approximate straight lines in the first region, the second region, and the third region are defined as M1, M2, and M3, respectively. M1 to M3, E9/E6, and E10/E6 are fall within respective specified scopes. M3 is greater than M2.
公开/授权文献
- US20160354647A1 GOLF CLUB 公开/授权日:2016-12-08
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