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US 5,707,411 AGranted
Frameless monolayer air register filter
OwnerDoreen Rodaway, Dixie Schwartzinventors
Life of this patent
Estimating the term…
Abstract
A nonwoven needlepunched polyester batt of single monolayer construction is cut to a dimension slightly larger or smaller than the dimension of an interior warm air register, and fitted into the plenum of the heating system by compression or by stretching, as the case may be. The batt is integral, having no pockets or chambers therein. The filter has no frame, as the nonwoven batt has sufficient rigidity in relation to its weight to remain in place in the plenum, and is kept against the air register by the flow of air through the duct system, thereby filtering air flow.
Claims2
An air filter comprising:
- a unitary, single monolayer construction, nonwoven fibrous batt of predetermined thickness, said batt being cut to a predetermined length and width, said batt being compactable when compressed and being expandable when stretched, such that said batt is compressible widthwise and lengthwise into a heating, ventilation or air conditioning system duct plenum that is smaller in size than said batt, and such that said batt is expandable widthwise and lengthwise into a heating, ventilation or air conditioning system duct plenum that is larger in size than said batt, said batt having no support frame members and said batt having no pockets in its single monolayer construction;
- said batt being inserted into the plenum of said duct into a position that is adjacent to an air register of said duct and substantially coplanar with the plane of said register.
Dependencies are inferred from the claim text.