Apparatus for and method of reclaiming used foundry sand
CA 1193067 A · Owner: Cosworth Research And Development Limited · Inventors: Vogel, Alfredo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for treating granular materials which require to be heated to drive off volatile constituents and which require to be cooled for example, foundry sand containing an organic binder. The method comprises the step of maintaining a mass of the material at a treatment temperature lying in the range 250°C-400°C for between four and thirty hours. The mass may be initially heated by virtue of a manufacturing process in which the mass has been previously used. Alternatively the mass may be, initially heated by a pre-heating step such as heating in a fluidised bed. Alternatively, the mass may be heated by being placed in heat transfer relationship with a second mass of the …
Read the whole patent
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 September 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 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.