| 发明名称 |
Method and means for operating a drill for eliminating axial scratches during retraction |
| 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.
|
| 申请公布号 |
US4440529(A) |
申请公布日期 |
1984.04.03 |
| 申请号 |
US19810258920 |
申请日期 |
1981.04.30 |
| 申请人 |
GENERAL DYNAMICS CORPORATION |
发明人 |
HENSLEE, SAMUEL P.;NORONHA, PASCAL J.;LOGAN, JOHN B. |
| 分类号 |
B23B35/00;(IPC1-7):B23B45/04;B23B45/14 |
主分类号 |
B23B35/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
