Method and apparatus for crushing material of different grain size
CA 2127389 A1 · Owner: Loesche Gmbh · Inventors: Lohle, Willy; Brundiek, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for crushing material of differing grain size are disclosed. The material is ground into particles in a grinding pan of a mill then spun over, the edge of the pan and conveyed upwards in a helical flow close to the casing wall of the mill by a gas-directing device producing a rotary flow. Centrifugal force and gravity result in the formation of an outer particle flow of oversize material. As a vented concentrated flow the, oversize material does not participate in the grinding and classifying process and at least a portion of the material is removed from the grinding and classifying chamber. A device for removing the oversize material is positioned on the casing …
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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
- Filed July 5, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2016.
- 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.