Method and apparatus for a combined hydraulic- mechanical recovery of extremely hard mineral raw material
CA 1081719 A · Owner: Gutehoffnungshutte Sterkrade Aktiengesellschaft · Inventors: Gunther, Roland; Witulski, Wilfried; Goris, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus is disclosed for recovery or mining, particularly suitable in winning predominantly hard minerals. The invention utilizes the sequence of first, undercutting a layer of the face of a seam at a predetermined depth by producing a cut by a jet of superpressurized water, second, mechanically breaking off the undercut portion by wedging tools inserted in the cut and, thirdly, by conveying the recovered material away from the seam working area. The invention improves the economy of the mining operation and also makes it possible to achieve the best results by selectively adjusting the position of different parts of the machine relative to its frame and also by adjusting and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.