发明授权
- 专利标题： Twist drill
- 专利标题（中）： 麻花钻
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申请号： US341776申请日： 1994-11-18
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公开(公告)号： US5492187A公开(公告)日： 1996-02-20
- 发明人: Axel Neukirchen , Rainer Batliner , Maximilian Stock , Ralf Baumann
- 申请人： Axel Neukirchen , Rainer Batliner , Maximilian Stock , Ralf Baumann
- 申请人地址： LIX Schaan
- 专利权人： Hilti Aktiengesellschaft
- 当前专利权人： Hilti Aktiengesellschaft
- 当前专利权人地址： LIX Schaan
- 优先权： DEX4339245.8 19931118
- 主分类号： B28D1/14
- IPC分类号： B28D1/14 ; E21B10/44 ; E21B10/46 ; E21B10/58
摘要：
A rock drill has an axially elongated shank (1) with a hard metal drill head (2) secured at one end. The transverse cross-section of the drill head is basically rectangular with cutters located along each of two diagonals of its cross-section. The cutters remove drillings from rock. The cutters include a main cutter (4) and two auxiliary cutters (5, 6) having the same rotational envelope curve.
公开/授权文献
- US5099504A Thickness/density mesuring apparatus 公开/授权日：1992-03-24
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