F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
110/69
F23L 13/02 (2006.01) F23L 11/00 (2006.01) F23N 1/06 (2006.01) F23N 3/08 (2006.01) F24H 9/20 (2006.01)
Patent
CA 1100820
ABSTRACT OF THE DISCLOSURE This invention relates to an automatic damper device for use in exhaust flues, such as flues of combustion devices ditioners, and the like, to prevent undesirable loss of hot air or cold air out the flue during periods when no combustion is taking place. The damper has a rotatable damper plate held in normal open position which provides a desired fall safe in the open position assurance. The damper is also adapted to remain in the open position during periods of combustion in the furance or water heater but otherwise be returned in the closed position to avoid the unnecessary loss of heated air or cooled air.
302440
Save Fuel Corporation
Swabey Ogilvy Renault
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