Method of making a finned cast recuperator tube
CA 1234966 A · Owner: Air Preheater Company, Inc. (The) · Inventors: Counterman, Wayne S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hollow metallic envelope 10 of a finned cast recuperator tube is cast with preformed interior fins 12 and exterior fins 16 integral therewith. A sand core 30 is formed about the preformed interior fins 12 with portions of the fins 12 protruding outwardly from the sand core and a sand mold 40, is formed to a cavity for receiving the sand core 30 with the preformed exterior fins 16 embedded in the sand mold with portions of the fins 16 protruding therefrom into the cavity. The sand core 30 is placed into the sand mold 40 in spaced relationship therewith so as to provide a clearance space 50 between the sand core 30 and sand mold 40 into which the portions of the interior fins 12 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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- 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.