发明名称 |
Drill Bit Head for Percussion Drilling Apparatus |
摘要 |
This invention relates to a percussion drill bit head for a percussion drilling apparatus, the drill bit head comprising a working surface and a plurality of super-hard buttons protruding from the working surface, the working surface having a hard area that is free of buttons and has Rockwell C hardness of at least 60 HRc. The invention further relates to a method of manufacturing a percussion drill bit head comprising a working surface and a plurality of buttons and a percussion drill bit assembly comprising a drill bit head according to the invention.
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申请公布号 |
US2011042146(A1) |
申请公布日期 |
2011.02.24 |
申请号 |
US20090919803 |
申请日期 |
2009.05.11 |
申请人 |
LACHMANN FRANK FRIEDRICH;FLYNN GERALD F;HILDEBRAND KARL GEORG |
发明人 |
LACHMANN FRANK FRIEDRICH;FLYNN GERALD F.;HILDEBRAND KARL GEORG |
分类号 |
E21B10/36;B05D1/08;B22F7/00;B23K1/00 |
主分类号 |
E21B10/36 |
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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