发明授权
- 专利标题： Cold headed center vacuum drill bit
- 专利标题（中）： 冷头中心真空钻头
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申请号： US201834申请日： 1994-02-25
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公开(公告)号： US5452628A公开(公告)日： 1995-09-26
- 发明人: Robert H. Montgomery, Jr. , Daniel C. Sheirer , James E. Elam , Paul E. Ewing
- 申请人： Robert H. Montgomery, Jr. , Daniel C. Sheirer , James E. Elam , Paul E. Ewing
- 申请人地址： PA Latrobe
- 专利权人： Kennametal Inc.
- 当前专利权人： Kennametal Inc.
- 当前专利权人地址： PA Latrobe
- 主分类号： B21K5/02
- IPC分类号： B21K5/02 ; B23B51/00 ; E21B10/38 ; E21B10/46 ; E21B10/58
摘要：
A drill bit for drilling holes in a work surface including a hard wear-resistant insert and a metal body including a top working surface of an irregular surface configuration having a slot for retaining the hard wear-resistant insert. The body having a metal grain structure substantially parallel with the contour of the body. In a preferred embodiment the body is formed by cold-heading.
公开/授权文献
- US6072295A Windshield wiping device for vehicle 公开/授权日：2000-06-06
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