Apparatus for control of differential pressure in a heating and cooling system
CA 2471978 A1 · Owner: Engelbrektsson, Anders · Inventors: Engelbrektsson, Anders
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an apparatus (1) for controlling the pressure difference in a heating or cooling system which comprises a heating or a , cooling source (2) and a feed duct (3) as well as a return duct (4) connected , to the source, and consumption devices (5) disposed between said ducts which , emit or receives heat, at least one valve or the like (6 and 7 and 8 respectively) being used to control the flow through such a loop a pressure , difference regulator (9) being used to keep the pressure difference between the feed duct and the return duct constant. According to the invention the , pressure difference regulator (9) is optionally mounted in one of said ducts (3 or 4) and …
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 January 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2025.
- 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.