F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
98/46
F23L 17/02 (2006.01)
Patent
CA 1227686
ABSTRACT OF THE DISCLOSURE There is disclosed an automatic damper for a chimney flue, which maintains the chimney draft at an adjusted value despite varying wind velocity and direction. A vertical shaft is rotatably supported over the top outlet of the flue by a support secured to the chimney. A weather cock is secured to the upper end of the vertical shaft and a transverse hori- zontal pivot rod is fixed intermediate its ends to the lower end of the vertical shaft at the level of the top of the flue outlet. A damper flap is pivoted at its mid-section on the pivot rod, defining two sections on either side of the pivot rod. A weight is secured to one section, so as to normally keep the flap in vertical position to fully open the flue, with the other flap section protruding upwardly from the chimney and exposed to the wind. Increasing wind velocity on the exposed flap section causes progressive closing of the flue to counteract the otherwise-increased draft produced by the increasing wind velocity. The system saves on fuel consumption. The weather cock keeps the flap facing the wind irrespective of the wind direction.
497103
Chabot Paul-Andre
Lesperance Pierre
LandOfFree
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