| 发明名称 | Golf club shaft and golf club using the same | ||
| 摘要 | A golf club shaft extending from a tip end to a butt end and made of fiber reinforced resin, comprises a weight being in a range of from 30 to 55 g, a whole length LS between the tip end and the butt end, a center of gravity of the shaft located with a distance LG from the tip end, a ratio of the distance LG to the whole length LS being in a range of from 0.54 to 0.65, a butt end portion which has a length of 300 mm from the butt end toward the tip end, the butt end portion including fibers including a low elastic fiber having an elastic modulus in a range of from 5 to 20 t/mm2, and a high elastic fiber having an elastic modulus greater than 20 t/mm2 and not more than 50 t/mm2. | ||
| 申请公布号 | US8876628(B2) | 申请公布日期 | 2014.11.04 |
| 申请号 | US201213644971 | 申请日期 | 2012.10.04 |
| 申请人 | Dunlop Sports Co. Ltd. | 发明人 | Hasegawa Hiroshi;Nakano Takashi |
| 分类号 | A63B53/10 | 主分类号 | A63B53/10 |
| 代理机构 | Birch, Stewart, Kolasch & Birch, LLP | 代理人 | Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 | 1. A golf club shaft extending from a tip end to a butt end and made of fiber reinforced resin, comprising a weight being in a range of from 30 to 55 g, a whole length LS between the tip end and the butt end, a center of gravity of the shaft located with a distance LG from the tip end, a ratio of the distance LG to the whole length LS being in a range of from 0.54 to 0.65, a butt end portion which has a length of 300 mm from the butt end toward the tip end, the butt end portion including fibers including a low elastic fiber having an elastic modulus in a range of from 5 to 20 t/mm2, and a high elastic fiber having an elastic modulus greater than 20 t/mm2 and not more than 50 t/mm2, and said fibers in the butt end portion comprising, in weight, the low elastic fiber of from 20 to 30% and the high elastic fiber of from 80 to 70%. | ||
| 地址 | Kobe JP | ||