Installation for two or more step excavating in a discontinuous open cut operation
CA 1182845 A · Owner: Mannesmann Aktiengesellschaft · Inventors: Franke, Rudiger; Weiss, Aby
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A direct spoil stacker, more particularly for use in an installation for the removal, in two or more steps of the, overburden lying above useful mineral in a discontinuous, open cut operation using a drag line excavator which, removes the lowermost step and stacks the directly obtained overburden on the other side of the excavation exposing the useful stratum, the direct spoil stacker comprising three travelling mechanisms arranged at the corners of a triangular support structure formed by struts which define a horizontal equilateral triangle, a main boom extending perpendicularly from one said strut and arranged in a medial plane of said support structure, one corner of the triangular …
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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 February 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2002.
- 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
Timeline From CIPO dates
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.