Heat pump system
CA 1295324 C · Owner: Pyramid Industries, Inc. · Inventors: Barry, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat pump system is disclosed which includes a pipe having a circular cross sectional shape and a diametrically disposed partition dividing the circular cross sectional shape into two semi-circular flow passages. Each flow passage having an area equal to the cross sectional area of the hole through a one inch diameter pipe. The two flow channels are connected together by a return means at their second end and one of the flow passages at the first end is connected to a pump which directs the fluid into a heat exchanger and a return passage is provided for the fluid from the heat exchanger to the second flow passage in the pipe. The pipe is disclosed in a medium like liquid or soil or 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 February 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 2009.
- 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.