发明名称 |
Threaded fastener with roll axis with its head provided with screwdriver mating surfaces located around the roll axis |
摘要 |
A spiral drive system for threaded fasteners includes driver-engageable surfaces on the head end of the fastener in which at least some of the driver-engageable surfaces are defined by a spiral segment configured to maximize torque transmission while spreading the driving load over a broad driver-fastener interface to reduce the risk of development of high stress regions. Drivers and related tooling also are disclosed. |
申请公布号 |
PL196601(B1) |
申请公布日期 |
2008.01.31 |
申请号 |
PL19980380853 |
申请日期 |
1998.10.28 |
申请人 |
PHILLIPS SCREW COMPANY |
发明人 |
STACY W. DODD |
分类号 |
F16B23/00;B21K1/46;B25B15/00 |
主分类号 |
F16B23/00 |
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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