Apparatus for cleaning drills
US4650012A · kind A · utility
10Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | May 1, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B12/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to an apparatus for cleaning, during its extraction without rotation, of a drill formed from a helical surface wound around an axial stem. It comprises a scraper blade capable of being inserted at will between two turns of the helical drill, and that it comprises a motor for causing the scraper blade to revolve around the stem substantially in synchronism with the speed of extraction of the drill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.