| 发明名称 |
COUPLING STRUCTURE BETWEEN SCREW HEAD AND TIGHTENING TOOL |
| 摘要 |
A coupling structure between a screw head and a tightening tool includes a recess (3) with a curved concave surface on the free base of the head (1) of the screw (2) and a protuberance (6) with a curved convex surface finishing the end of the tool (5). The recess has axial projections (4) internally and the protuberance (6) has meridional grooves (7).
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| 申请公布号 |
US2012103147(A1) |
申请公布日期 |
2012.05.03 |
| 申请号 |
US201013264693 |
申请日期 |
2010.04.14 |
| 申请人 |
FARRE BERGA ORIOL;FARRE BERGA RAMON;UNIVERSAL BALL HEAD, S.L. |
发明人 |
FARRE BERGA ORIOL;FARRE BERGA RAMON |
| 分类号 |
B25B15/00;F16B23/00 |
主分类号 |
B25B15/00 |
| 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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