发明授权
US4440529A Method and means for operating a drill for eliminating axial scratches
during retraction
失效
用于操作钻头以消除回缩期间的轴向划痕的方法和装置
- 专利标题： Method and means for operating a drill for eliminating axial scratches during retraction
- 专利标题（中）： 用于操作钻头以消除回缩期间的轴向划痕的方法和装置
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申请号： US258920申请日： 1981-04-30
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公开(公告)号： US4440529A公开(公告)日： 1984-04-03
- 发明人: Samuel P. Henslee , Pascal J. Noronha , John B. Logan
- 申请人： Samuel P. Henslee , Pascal J. Noronha , John B. Logan
- 申请人地址： TX Fort Worth
- 专利权人： General Dynamics Corporation
- 当前专利权人： General Dynamics Corporation
- 当前专利权人地址： TX Fort Worth
- 主分类号： B23B35/00
- IPC分类号： B23B35/00 ; B23B45/04 ; B23B45/14
摘要：
A drill employed for drilling holes in airframes is provided with means to rotate the drill bit during retraction and means to control the rate of retraction of the drill bit from the hole in a manner to prevent the formation of axial scratches in the wall of the hole.
公开/授权文献
- US5469311A Vibration absorbing structure for a magnetic disk apparatus 公开/授权日：1995-11-21
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