发明名称 |
Self-tapping, corrosion-resistant screw with hardened tip |
摘要 |
The invention comprises a self-screwthread-forming screw of corrosion-resistant steel, which screw is partially precipitation-hardened. The invention also concerns a process for producing such a screw in which the screw is firstly shaped by pressing and rolling or by screwthread rolling or cutting or in other known fashion characterized in that the screw is then partially precipitation-hardened. |
申请公布号 |
US6338600(B2) |
申请公布日期 |
2002.01.15 |
申请号 |
US19990440231 |
申请日期 |
1999.11.15 |
申请人 |
EJOT VERBINDUNGSTECHNIK GMBH & CO. KG |
发明人 |
FRIEDERICH HEINRICH;SCHMOOCK REINHARD |
分类号 |
C21D6/00;C21D6/02;C21D9/00;F16B25/00;F16B33/00;F16B33/06;(IPC1-7):F16B35/04 |
主分类号 |
C21D6/00 |
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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