Boosted air source heat pump
CA 2536757 C · Owner: Northeast Bank · Inventors: Shaw, David N.; Fishman, David S.
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 presented having a primary compressor a booster , compressor, a multi-step thermostat an indoor coil, an outdoor coil, a , refrigerant flow conduit connecting these elements is a closed loop system and at least one pressure sensor positioned to always sense the refrigerant system low side pressure, which is commensurate with outdoor ambient air temperature in all heating modes of operation. The pressure sensor functions as an override and safety control to prevent or permit operation of the compressors, and also other system components depending on outside air , temperature. The primary compressor is preferably a multi-capacity compressor. A defrost energy …
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 17, 2004 and granted March 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 17, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2026.
- 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.