发明名称 |
SELBSTBOHRENDER ANKERBOLZEN |
摘要 |
<p>An elongate roof bolt includes a bolt body having an axially extending central bore and defining a leading end. The leading end includes a pair of axially extending abutment elements formed by machining. Each abutment element includes an abutment face for engagement with a drill tip on opposite sides thereof, to transmit rotary forces during drilling. The drill tip extends across the leading end of the bolt body and is bonded to the abutment elements by welding, soldering or brazing. The bore opens out of said bolt bonded adjacent said leading end.</p> |
申请公布号 |
DE60016782(T2) |
申请公布日期 |
2005.12.08 |
申请号 |
DE2000616782T |
申请日期 |
2000.10.25 |
申请人 |
SANDVIK AB (PUBL), SANDVIKEN |
发明人 |
WEAVER, STEVEN;MCLEAN, MICHAEL;JOHNSON, ERIC |
分类号 |
E21D21/00;(IPC1-7):E21B10/54 |
主分类号 |
E21D21/00 |
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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