Fail safe automatic flue damper mechanism
CA 1189407 A · Owner: Grant, David M. · Inventors: Grant, David M.
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 electronically controlled auto-, matically operated flue damper mechanism which is totally fail safe in operation. The mechanism is to be fitted within the draft hood of a thermostatically controlled heating device such as a gas or oil fired furnace. The electronic control circuitry of the damper being integrated with that of the heating device to which it is fitted. The action of the damper being to close the flue a sufficient time after combustion has stopped to allow, all noxious gases from combustion to have left the flue and to, open the flue before combustion can begin.
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
- Granted June 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2002.
- 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.