发明名称 |
HARD-ALLOY INSERT FOR CROWN BIT |
摘要 |
FIELD: drilling of blast holes in rocks by rotary-percussion method. SUBSTANCE: hard-alloy insert has cylindrical side surface, axial duct and working surface implemented along arc cosine in axial direction which symmetry axis is parallel to longitudinal axis of insert. EFFECT: enhanced crushing efficiency. 3 dwg |
申请公布号 |
RU2202030(C2) |
申请公布日期 |
2003.04.10 |
申请号 |
RU19980111133 |
申请日期 |
1998.06.09 |
申请人 |
SIBIRSKIJ GOSUDARSTVENNYJ INDUSTRIAL'NYJ UNIVERSIT |
发明人 |
DVORNIKOV L.T.;VECHUZHANIN D.S. |
分类号 |
E21B10/56 |
主分类号 |
E21B10/56 |
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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