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US 4,821,473 AGranted
Chimney by-pass
OwnerErnest E. Cowellinventor
Life of this patent
Estimating the term…
Abstract
A chimney by-pass is disclosed for use with a main chimney. In case of a chimney fire, a movable damper closes off the main chimney, substantially reducing the severity of the chimney fire. The movable damper also opens an auxiliary chimney, allowing smoke to exit, uninterrupted through the auxiliary chimney, and may include a fan to assist the exit of smoke into the atmosphere. The movable damper may be actuated manually or automatically in case of a chimney fire.
Claims7
A chimney by-pass for use with a main chimney to reduce chimney fires and handle smoke, comprising;
- an auxiliary chimney;
- a movable damper;
- means for moving said movable damper, thereby closing said main chimney and opening said auxiliary chimney.
Dependencies are inferred from the claim text.