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US 3,941,067 AGranted
Barometric draft regulator
AssigneeSelkirk Metalbestos
InventorsNabil Y. Nicolas, Christian G. Schmelzle
Life of this patent
Estimating the term…
Abstract
An improved automatic draft regulator having significantly fewer parts than previous such devices, and comprising a frame adapted to fit into the flue pipe of a furnace, a gate pivotally mounted in the frame, and adjustable weight means pivotally connected to the gate and extending through it.
Claims12
An automatic draft regulator comprising (a) a frame adapted to be mounted on the flue pipe of a fuel burning applicance;
- (b) an opening in the frame;
- (c) a gate pivotally mounted on hinges within the opening;
- (d) an opening in the gate;
- and (e) a substantially planar plate member pivotally connected to the gate and extending through the opening therein, said plate member being of substantially uniform thickness and acting as a weight means for balancing said gate.
1 more element
Dependencies are inferred from the claim text.