发明授权
- 专利标题: Rock drilling tool
- 专利标题(中): 岩石钻具
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申请号: US12576申请日: 1979-02-15
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公开(公告)号: US4275796A公开(公告)日: 1981-06-30
- 发明人: Werner Kleine
- 申请人: Werner Kleine
- 申请人地址: DEX Achim-Uphusen
- 专利权人: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
- 当前专利权人: Gebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
- 当前专利权人地址: DEX Achim-Uphusen
- 优先权: DEX2807156 19780220
- 主分类号: B23B51/04
- IPC分类号: B23B51/04 ; E21B10/38 ; E21B10/40 ; E21C13/08
摘要:
A central pilot shaft having a cutting member at its end protrudes forwardrom 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.
公开/授权文献
- US6030912A Sintered hard material 公开/授权日:2000-02-29
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