US 4,368,663 AGranted

Chimney damper

OwnerSalvatore C. Tabaccoinventor

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Abstract

A novel damper is provided which is attached to the top of a chimney flue for minimizing or altogether eliminating heat losses and air conditioning losses through the chimney flue when the chimney is not in use as well as preventing objects and/or animals from entering into the chimney. The damper comprises a substantially rectangular stamped frame having a central opening and a portion adapted to flatly abut against the top of a chimney flue. The frame further includes at least two and preferably four flanges extending downwardly from the central opening while screws threadably engage the flanges to secure the frame to the top of the chimney flue. A door is pivotally mounted to the frame and movable between an open and a closed position while a spring resiliently urges the door towards its open position. An elongated chain is connected at one end to the door, extends through the chimney flue and is accessible at its other end through a fireplace opening. To close the door, the chain is pulled downwardly and secured in its downward position by a pin attached within the fireplace opening.

Claims8

Dependent claims

A damper attachable to the top of a chimney flue comprising:

a substantially rectangular stamped frame having a central opening, said frame having a portion dimensioned to flatly abut against the top of a chimney flue,
means for attaching said frame to said flue,
a door pivotally mounted to said frame and movable between an open and a closed position wherein in said closed position said door covers said opening whereas in said open position, said door is spaced apart from said opening,
means for resiliently urging said door towards said open position,
elongated means connected at one end to said door and extending downwardly through said chimney flue for moving said door between said open and said closed position,
a bracket having a hole, said bracket secured to said door, and
wherein said resilient urging means comprises a rod, means for pivotally securing one end of said rod to said frame, the other end of said rod being longitudinally slidably positioned through said hole in said bracket, a stop member secured adjacent said other end of said rod for retaining said rod within said bracket hole and so that said bracket abuts against said stop member when said door is in said open position, and a helical compression spring positioned around said rod and sandwiched in between said bracket and said pivotal securing means.

4 more elements

Dependencies are inferred from the claim text.