发明授权
- 专利标题: Drill and drilling method for workpiece
- 专利标题(中): 钻孔和钻孔方法
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申请号: US12318249申请日: 2008-12-23
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公开(公告)号: US09180531B2公开(公告)日: 2015-11-10
- 发明人: Tatsuo Nakahata , Manabu Saito , Masanori Hosoi , Hideharu Takahashi
- 申请人: Tatsuo Nakahata , Manabu Saito , Masanori Hosoi , Hideharu Takahashi
- 申请人地址: JP Tokyo
- 专利权人: FUJI JUKOGYO KABUSHIKI KAISHA
- 当前专利权人: FUJI JUKOGYO KABUSHIKI KAISHA
- 当前专利权人地址: JP Tokyo
- 代理机构: Smith, Gambrell & Russell, LLP
- 主分类号: B23B51/02
- IPC分类号: B23B51/02 ; B23B35/00
摘要:
A drill includes a cutting edge. The cutting edge has a point angle which is continuously decreased from a center-position point angle A (herein, 0°
公开/授权文献
- US20100158626A1 Drill and drilling method for workpiece 公开/授权日:2010-06-24
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