发明名称 |
Rock drilling device and a drill stem for said device. |
摘要 |
<p>A rock drilling machine (11) is generating strokes to a drill stem by a thread connection. The adapter (12) has a bronze lining (20) that constitutes a female thread. The bronze lining (20) increases the life of the thread connection and is also detachable. Coupling sleeves (30) for an extension rod equipment can have similar bronze linings (20) as well as the drill bit.</p> |
申请公布号 |
EP0198809(A2) |
申请公布日期 |
1986.10.22 |
申请号 |
EP19860850121 |
申请日期 |
1986.04.10 |
申请人 |
ATLAS COPCO AKTIEBOLAG |
发明人 |
ANDERSSON, KURT |
分类号 |
B25D17/06;E21B17/042;F16L15/00;(IPC1-7):E21B17/00 |
主分类号 |
B25D17/06 |
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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