发明名称 |
Screw for contaminated pre-tapped holes |
摘要 |
A locking screw having a head at one end, a special entry portion at the other end, and a trilobular shank portion extending from the entry portion toward the head. The screw is further characterized in that the thread profile is of a double angle configuration symmetrical about an axis perpendicular to the longitudinal axis of the screw. The entry section is tapered and is formed with a series of truncations which serve to clear progressively a contaminating coating in an internally threaded workpiece, such as a nut, when the screw is threaded therein.
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申请公布号 |
US5000638(A) |
申请公布日期 |
1991.03.19 |
申请号 |
US19890441390 |
申请日期 |
1989.12.21 |
申请人 |
CONTI FASTENERS AG |
发明人 |
ESSOM, CHARLES J.;BILLINGHAM, ERNEST W. |
分类号 |
F16B33/02;F16B35/00;F16B35/04;F16B39/30 |
主分类号 |
F16B33/02 |
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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