Control of space heating and water heating using variable speed heat pumps
CA 2048262 A1 · Owner: Paige, Lowell Edward · Inventors: Dunshee, Kevin Bryant; Paige, Lowell Edward; Dudley, Kevin F.Arrell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an integrated heat pump and water heating system with a variable speed compressor drive, a variable speed indoor fan and an expansion valve with a variable duty cycle the indoor fan speed is controlled as a function of a space heating load and the compressor speed is controlled as a function of outdoor temperature and space heating load.
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 August 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2013.
- 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.