Energy-efficient ventilation system
CA 2108285 A1 · Owner: Beck, Anthony J. · Inventors: Beck, Anthony J.; Beck, Anthony J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ventilation system for extracting warm stale air from a, building and transferring heat therefrom to incoming colder fresher, air comprises exhaust bellows (14) for extracting the stale air through a counterflow, high pressure drop heat-exchanger (18) and, intake bellows (26) for driving fresh air through the heat-exchanger (18) into the building. Each bellows (14 18) comprises two, pivotally-mounted, perforated bellows plates (46 54) each covered , by a resilient membrane (48) having non-registering perforations. The movement imparted to the plates (46 54) by the profiled cam, wheel (36) is such as to cause a steady flow of air therethrough. Alternatively the pivotal bellows (46 54) may …
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 April 13, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 13, 2014.
- 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.