发明公开
- 专利标题: Drill bit
- 专利标题(中): Bohrer的
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申请号: EP14182342.7申请日: 2014-08-26
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公开(公告)号: EP2842673A1公开(公告)日: 2015-03-04
- 发明人: Santamarina, Aland , Steinbrunner, Glen V , Johnson, David N
- 申请人: Black & Decker Inc.
- 申请人地址: 1207 Drummond Plaza Newark, Delaware 19711 US
- 专利权人: Black & Decker Inc.
- 当前专利权人: Black & Decker Inc.
- 当前专利权人地址: 1207 Drummond Plaza Newark, Delaware 19711 US
- 代理机构: Bell, Ian Stephen
- 优先权: US201361871446P 20130829; US201414462935 20140819
- 主分类号: B23B51/02
- IPC分类号: B23B51/02
摘要:
An elongated drill bit (20) has a shank (22) at one end and a working end (24) at the other. A flute portion (26) is between the working end (24) and the shank (22). The flute portion (26) is continuous with the shank (22) and the working end (24) and is generally unitarily formed with them. The flute portion (26) has at least one flute (30) with a helix angle between approximately 30° and 35°. The working end (24) has a pilot tip (36) with a cutting portion (34). A tapered web (94) is formed in the flute portion (26), a thickness (K) of the web (94) at the tip of the working end (24) is about 9% to 15% of the nominal diameter (D).
公开/授权文献
- EP2842673B1 Drill bit 公开/授权日:2018-11-21
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