发明名称 Golf club head
摘要 A hollow golf club head comprises: a face portion whose front face defines a club face for hitting a ball; a crown portion intersecting the club face at the upper edge thereof; and a sole portion intersecting the club face at the lower edge thereof, wherein at least one of the sole portion and the crown portion is provided along the front edge thereof with a face-backing zone in which the rigidity is gradually increased from its toe-side end and heel-side end toward the center thereof.
申请公布号 US2005124436(A1) 申请公布日期 2005.06.09
申请号 US20040998549 申请日期 2004.11.30
申请人 SUMITOMO RUBBER INDUSTRIES, LTD. 发明人 KAKIUCHI HISASHI;ONUKI MASAHIDE
分类号 A63B53/04;(IPC1-7):A63B53/04 主分类号 A63B53/04
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