发明授权
- 专利标题: Drill head for rock drills
- 专利标题(中): 钻头钻头
-
申请号: US12640612申请日: 2009-12-17
-
公开(公告)号: US08225889B2公开(公告)日: 2012-07-24
- 发明人: Christoph Wetter , Roland Foser , Jens Schneider , Markus Meierhofer
- 申请人: Christoph Wetter , Roland Foser , Jens Schneider , Markus Meierhofer
- 申请人地址: LI Schaan
- 专利权人: Hilti Aktiengesellschaft
- 当前专利权人: Hilti Aktiengesellschaft
- 当前专利权人地址: LI Schaan
- 代理机构: Crowell & Moring LLP
- 优先权: DE102008054869 20081218
- 主分类号: E21B10/40
- IPC分类号: E21B10/40
摘要:
A drill head extending along a drill axis made of hard metal for rock drills is disclosed. The drill head features at least one major cutting edge and at least one minor cutting edge, where the major cutting edge extends from a first radially inner end to a first radial outer end which lies on a first diameter and where the minor cutting edge extends from a second radially inner end to a second radially outer end which lies on a second diameter that is smaller than the first diameter. A first enveloping surface defined by the minor cutting edge projects completely axially over a second enveloping surface defined by the major cutting edge.
公开/授权文献
- US20100158625A1 DRILL HEAD FOR ROCK DRILLS 公开/授权日:2010-06-24
信息查询