Method and system for winning minerals
US3961824A · kind A · utility
69Cited by
6References
12Claims
0Family size
Inventors
Key dates
| Filing date | Oct 21, 1974 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Oct 21, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F13/042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sectional scraper device which is foldable in zig-zag position by remote pulling means and which can be let down through a clad bore hole and can be deviated to follow layers of mineral to be mined by a to and fro movement of the scraper device combined with transport of loosened minerals by liquid circulation through the bore hole. The scraping action may be strengthened by the action of liquid jets emanating from the scraper device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.