发明名称 |
Hollow bolt comprising a longitudinal bore |
摘要 |
A process for producing hollow bolts including a longitudinal bore with the hollow bolts being provided with circumferential notches. The hollow bolts are provided with longitudinal grooves extending between elevations determining the bolt diameter, wherein circumferential notches are rolled onto the hollow bolts provided with the longitudinal grooves and the elevations, the longitudinal grooves being of such cross-section that some of the material displaced during rolling-on of the notches flows into the longitudinal grooves. |
申请公布号 |
US8635894(B2) |
申请公布日期 |
2014.01.28 |
申请号 |
US20060921773 |
申请日期 |
2006.05.31 |
申请人 |
CHRIST EBERHARD;EJOT GMBH & CO. KG |
发明人 |
CHRIST EBERHARD |
分类号 |
B21D17/04;B23G9/00;F16B35/00;F16B35/04 |
主分类号 |
B21D17/04 |
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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