发明名称 |
ДОЛОТО ДЛЯ РОТОРНОГО БУРЕНИЯ РЕЖУЩЕГО ТИПА |
摘要 |
A cutting pick includes an elongate shank, a cutting tip fixed to one end of the shank to project from that end and which is of a material that is harder than the material of the shank, and an annular sleeve which is attached about the shank adjacent the cutting tip. The sleeve is of a material (e.g., tungsten carbide) which is harder than the material of the shank and which has a lower propensity for incendive spark production during a cutting operation than the material of the shank. The sleeve includes a plurality of annular sleeve portions which are attached about the shank immediately adjacent to each other. |
申请公布号 |
RU2006137711(A) |
申请公布日期 |
2008.05.10 |
申请号 |
RU20060137711 |
申请日期 |
2005.03.23 |
申请人 |
САНДВИК ИНТЕЛЛЕКЧУАЛ ПРОПЕРТИ АБ (SE) |
发明人 |
СЛИП Кит (AU);УИВЕР Стивен (AU) |
分类号 |
E21C35/18;E21C25/14;E21C35/183;E21C35/197;E21F5/00 |
主分类号 |
E21C35/18 |
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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