发明名称 Golf club
摘要 A golf club with one or more annular grooves formed on the outer circumferential surface of the hosel portion of the head, the hosel portion being provided with an outwardly widened tapered surface on the inner circumferential surface of the opening end of a shaft insertion hole of the hosel portion, thus preventing brakeage of the shaft by way of the groove(s) and the tapered surface. The grooves can be filled with non-rigid cosmetic members for a better appearance.
申请公布号 US5647807(A) 申请公布日期 1997.07.15
申请号 US19960616703 申请日期 1996.03.15
申请人 YAMAHA CORPORATION 发明人 NAGAMOTO, ITSUSHI
分类号 A63B53/02;(IPC1-7):A63B53/02 主分类号 A63B53/02
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