发明授权
- 专利标题: Rock drill
- 专利标题(中): 摇滚钻
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申请号: US359122申请日: 1989-05-31
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公开(公告)号: US4951761A公开(公告)日: 1990-08-28
- 发明人: Wolfgang Peetz , Bernhard Moser , August Haussmann
- 申请人: Wolfgang Peetz , Bernhard Moser , August Haussmann
- 申请人地址: DEX Ravensburg
- 专利权人: Hawera Probst GmbH & Co.
- 当前专利权人: Hawera Probst GmbH & Co.
- 当前专利权人地址: DEX Ravensburg
- 优先权: DEX3820695 19880618
- 主分类号: E21B10/44
- IPC分类号: E21B10/44 ; E21B10/58
摘要:
A rock drill having a drilling head which, in an asymmetric arrangement relative to the main cutting tip, has at least one additional secondary cutting tip, the angle enclosed between the single cutting edge of the main cutting tip and the secondary cutting tip being formed as an acute angle.
公开/授权文献
- US4418329A Fast-response temperature sensor 公开/授权日:1983-11-29
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