US 5,240,487 A · Warm air register filter and scent dispenser

Abstract

A frame carries a variable flow scent dispenser and supports an air filter. The frame, dispenser and filter are to be inserted as a unit into a forced air heating and/or cooling system duct adjacent to the duct outlet through a floor or wall register. The filter is in the form of a two-ply fibrous sheet with an opening between the plies to receive the frame and dispenser. The filter collects dirt particles borne by the warm air as it leaves the duct and is quickly and easily replaceable. The scent dispenser is a container for scented air freshening material and has apertures through opposite walls, which walls are disposed transversely to the direction of airflow, permitting warm airflow through the container. The warm air will cause evaporation from the scented material and will entrain the vaporous scent and disperse the scent throughout the room. A slide is adjustable to increase or decrease the aggregate area of the apertures in one of the apertured container walls so that the intensity of the air freshening scent carried into the room can be controlled.

Claims12

Dependent claims

A filter unit for forced air duct outlet in ventilation systems, comprising:

a) a substantially planar frame means for placing within an air duct outlet;
b) filter means including an opening for removably receiving said frame means, said filter means comprises first and second substantially planar plies of fibrous sheet material connected to each other only at the side end portions thereof so as to form a sleeve open at both ends thereof to form said opening;
c) container means for receiving scent-carrying means, said container means being positioned substantially parallel to the plane of said frame means;
d) said frame means including rib means for supporting said container means, said rib means including at least one rib member extending generally transversely to said frame means;
and
e) said container means including aperture means for directing passage of air from a forced air source through said container means.

3 more elements

A filter unit for a forced air duct outlet in heating and/or cooling systems, comprising:

a) resilient substantially planar frame means;
b) disposable filter means having two substantially planar plies of fibrous sheet material of a shape similar to and a size slightly larger than said frame means;
c) a substantial portion of the margin of said plies being connected together to form sleeve means having a marginal opening of an extent sufficient for passage of said frame means into said sleeve means;
d) said frame means having a size and shape in conformity with the internal wall of a duct outlet such that said frame means, upon insertion into and disposition transversely of the duct outlet, will press the filter means margin into substantially continuous engagement with said duct outlet internal wall;
e) said frame means including transverse rib means located substantially equidistantly from opposite end portions of said frame means for strengthening said frame means and forming grasp means for flexing said frame means during insertion of the filter unit into a forced air duct outlet;
and
f) container means carried by the rib means for receiving volatile scent-carrying means, said container means having a pair of spaced substantially parallel walls disposed substantially parallel to the plane of the frame means, and aperture means through each of said walls, said aperture means are substantially perpendicular to the plane of said frame for directing passage of air from a forced air duct through said container means and said scent-carrying means.

4 more elements

Dependencies are inferred from the claim text.

Warm air register filter and scent dispenser

Life of this patent

Warm air register filter and scent dispenser

Life of this patent

Abstract

Claims12