Drill changing device
US3973863A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1975 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Jan 10, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T483/1793
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention provides a drill changing device for a drilling machine in which a collar is provided on the shank of a drill at a predetermined location relative to the tip of the drill, the collar being frictionally gripped by a split sleeve so that the shank projects outwardly from the sleeve, the sleeve being slidable relative to a fixed support and normally biased against a shoulder on the support, allowing overtravel when the collet of a drilling machine engages the collar and receives the shank. The tip of the drill is at a predetermined position relative to the collet when the collet engages the collar so that the drill will effect proper penetration of the workpiece in a drilling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.