Economizer with curved vanes
CA 2368987 A1 · Owner: Cleary, William J. · Inventors: O'Brien, Brett E.; Kalinowski, Benjamin J.; Raykov, Rumen N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is an economizer (50) that is capable of mixing outside air and inside air while incurring a significantly low pressure drop across the return air damper. In one embodiment the economizer (50) comprises a , mixing chamber (56) a return air vent (52), and an outside air vent (54). The economizer (50) further comprises a plurality of curved return air dampers (62) moveable from an open position to a closed position to control the flow of return air to the mixing chamber (56). The economizer (50) further comprises a plurality of straight dampers (66) moveable from an open position to a closed position to control the flow of outside air to the mixing chamber (56). …
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 31, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2023.
- 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.