发明授权
- 专利标题： Drill
- 专利标题（中）： 钻头
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申请号： US11124095申请日： 2005-05-09
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公开(公告)号： US07354229B2公开(公告)日： 2008-04-08
- 发明人: Hideo Wakui , Shoichi Takahashi , Hidehito Watanabe
- 申请人： Hideo Wakui , Shoichi Takahashi , Hidehito Watanabe
- 申请人地址： JP Tokyo
- 专利权人： Union Tool Co.
- 当前专利权人： Union Tool Co.
- 当前专利权人地址： JP Tokyo
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP2004-348156 20041201
- 主分类号： B23B51/00
- IPC分类号： B23B51/00 ; B23B51/02
摘要：
A drill including a chisel edge provided at a tip end portion, a spiral first chip discharging groove and a spiral second chip discharging groove, land portions provided between the first chip discharging groove and the second chip discharging groove, and a cut blade provided at an edge of a rake surface of the first chip discharging groove, characterized in that the first chip discharging groove and the second chip discharging groove are provided asymmetrically with respect to a drill rotational center and a land portion behind the first chip discharging groove is larger than a land portion behind the second chip discharging groove.
公开/授权文献
- US20060115339A1 Drill 公开/授权日：2006-06-01
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