Heat collector tube and a solar system unit
CA 1209430 A · Owner: Nitto Kohki Co. Ltd. · Inventors: Takeuchi, Hirosato; Mikiya, Toshio; Degawa, Fumito
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum glass tube type heat collector tube with a substantially straight, double cylindrical construction is closed at its initially open end with an end cap having two or more separate ports for heat transmitting medium. A solar system unit is made up of a center conduit with two separate medium passages and a plurality of such heat collector tubes combined in a rib like arrangement with a valve mechanism arranged at every junction of the center conduit with the tubes which instantly closes upon accidental breakage of the associated tube. Easy drainage of the medium releaves the tubes from breakage due to medium freezing and instant closing of the valve upon tube breakage enables free …
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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 August 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
- 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.