Energy saving flue damper
CA 1102901 A · Owner: Mastec Engineering Limited · Inventors: Masse, Terrence J.; Barsoum, Fouad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Terrence J. MASSE and, Fouad BARSOUM, ABSTRACT Disclosed is a flue damper mechanically driven through a sensor control to change the physical position of a damper within a flue associated with a furnace or other combustion device. By means after the demand for ignition of the furnace the flue damper is, rotated slowly into the full open position whereupon ignition of the furnace is permitted. After the demand has been satisfied the, ignition is ceased and at a predetermined time thereafter the damper is slowly moved to the closed position whereby to inhibit completely in, the cases of oil fired devices, and to a substantial degree (a maximum of 90%), in gas fired devices, the orifice size …
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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
- Granted June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
- 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.