发明名称 |
IRON GOLF CLUB AND METHOD FOR MANUFACTURING THE SAME |
摘要 |
An iron golf club is one made of metal material, which is manufactured integrally through press working and gives dedication to improvement of golf club design. The head (1) has a concave portion (4) surrounded by a convex portion (6) in the backside portion (3) behind the face portion (2). Treatment for making a mirror surface is applied to the bottom portion (5) of this concave portion through press working with a fixed die (11) having a surface roughness finer than the mirror surface for which treatment for making a mirror surface is to be performed and a movable die (10). Press working of this bottom portion can be also performed through treatment for making a mirror surface with a liner member (17).
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申请公布号 |
US2012214612(A1) |
申请公布日期 |
2012.08.23 |
申请号 |
US201213397818 |
申请日期 |
2012.02.16 |
申请人 |
KONDO RUI;HASEGAWA TAMOTSU;K. K. ENDO SEISAKUSHO |
发明人 |
KONDO RUI;HASEGAWA TAMOTSU |
分类号 |
A63B53/04;B21K17/00 |
主分类号 |
A63B53/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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