Vav system coordinator
CA 2005497 C · Owner: Parker, Edward · Inventors: Parker, Edward; Parker, Jeffrey L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A microcomputer-based system coordinator for variable air volume (VAV) system through which conditioned air is supplied to a plurality of zones. The VAV system coordinator (VSC) is used to coordinate a central system VAV cooling and heating operation based on the zone requirements of its associated slave thermostats and fan box monitors. The VSC is used as a slave VSC which receives information from zone thermosats and fan box monitors and communicates with a master VSC which is used for overall system coordination. The VSC also receives information from temperature and humidity sensors and the real time for use in system operation.
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 December 14, 1989 and granted May 31, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2011.
- 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.