Air duct plug

Details Air duct plug Air duct plug

1989-10-02

1990-10-23

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

126319, F16L 5510

Patent

active

049644386

ABSTRACT:
An air duct plug is provided for obturating an open end of an air duct during periods of nonuse to prevent or limit the escape of cooled or heated air through said air duct, in a dwelling, public building or structure thereof. The plug further provides a depending handle for ease of removal from the air duct when it is determined that said air duct should be used.

REFERENCES:
patent: 537864 (1895-04-01), Smith
patent: 620129 (1899-02-01), Higgins
patent: 3038631 (1962-06-01), Calder
patent: 4137647 (1979-02-01), Clark
patent: 4194494 (1980-03-01), Wagner

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