Method and means for operating a drill for eliminating axial scratches during retraction
US4440529A · kind A · utility
25Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Apr 30, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/6757
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.