Method of reclaiming green sand
CA 1256266 A · Owner: Leidel, Dieter S. · Inventors: Leidel, Dieter S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for reclaiming green sands having a wide range of moisture and temperature conditions involves processing such sands in a single reclaimer unit to produce free flowing reclaimed sand adapted to pass through a 20 mesh screen and having a temperature preferably no greater than about 120°F. The method involves effecting attrition of a batch of molding sand supplied to the reclaimer unit, applying a vacuum exhaust to the unit primarily to remove a calcined clay binder and water vapor therefrom, sensing the mean temperature of the sand and, selectively adding moisture or heat to the sand as required to produce reclaimed sand having predetermined moisture and temperature conditions …
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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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 2006.
- 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.