发明名称 Golf club
摘要 A golf club comprises a club shaft and a hollow club head, wherein the club head has a loft angle of from 14 to 18 degrees, a head volume of not less than 250 cc, and a sweet spot at a vertical distance of from 1 to 5 mm downwards of a face center, and the club shaft has a variable flexural rigidity whose minimum is in a range of from 5 to 10 N.m<2>, and the minimum flexural rigidity occurs in a range between 0% and 40% of the length of the club shaft from the end of the club shaft.
申请公布号 US2004009830(A1) 申请公布日期 2004.01.15
申请号 US20030453513 申请日期 2003.06.04
申请人 NISHIO MASAYOSHI 发明人 NISHIO MASAYOSHI
分类号 A63B53/04;A63B53/10;(IPC1-7):A63B53/04 主分类号 A63B53/04
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