Horizontal spiral ground heat exchanger
CA 2025869 A1 · Owner: Svec, Otto J. · Inventors: Svec, Otto J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Otto J. Svec, ABSTRACT OF THE DISCLOSURE A horizontal ground heat exchange system employing the natural thermal qualities just below the earth surface, comprising an elongated horizontal trench and a coil of high density elastomeric material horizontally inserted into an elongated horizontal trench. The coil is connected at one end by inlet tubing to an open holding tank and at the other end by return tubing connected to the heat pump unit. The entire coil is preferably enclosed in sand and backfill may be inserted in the horizontal trench to achieve ground level. A brine solution is passed through the system to transfer the thermal energy to or from the heat pump system.
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
- Filed September 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2012.
- 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.