| 发明名称 |
Rock drilling tool |
| 摘要 |
A central pilot shaft having a cutting member at its end protrudes forward from the axis of a circular bracket disc which has a plurality of cutting members arranged on its periphery. An exhaust channel permits removing fine particles from in front of the bracket disc.
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| 申请公布号 |
US4275796(A) |
申请公布日期 |
1981.06.30 |
| 申请号 |
US19790012576 |
申请日期 |
1979.02.15 |
| 申请人 |
GEBRUDER HELLER VERWALTUNGSGESELLSCHAFT MIT BESCHRANKTER HAFTUNG |
发明人 |
KLEINE, WERNER |
| 分类号 |
B23B51/04;E21B10/38;E21B10/40;(IPC1-7):E21C13/08 |
主分类号 |
B23B51/04 |
| 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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