US4753573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering means for ceiling fan blades
Assignee: Individual
•
Filing: 1987-03-23
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Granted: 1988-06-28
•
Expires: 2007-03-23
Abstract
Abstract An air filter for attaching to a top and/or bottom surface of a fan blade. The air filter is constructed from an elongated strip of porous material capable of having air pass therethrough while trapping airborne particles borne by the air. Also, the elongated strip has opposed exposed surfaces and a peripheral edge extending therearound and preferably, an adhesive strip having opposite surfaces and an adhesive substance on each of the opposite surfaces is attached to one side edge of the elongated strip. The other opposed surface of the adhesive strip is preferably attached to a top and/or bottom surface of a fan blade. Thus, the filter strip sweeps and filters air moving across the one surface of the fan blade as the fan blade rotates.
Inventors
- 👤 Charles A. McKnight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/108
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
156 words
An air filter attached to a surface of a fan blade which has relatively wide opposite surfaces comprising an elongated strip of relatively thin rigid porous material capable of having air pass therethrough while trapping airborne particles borne by the air, said strip being relatively thin compared to the width of the surfaces of the fan blade and being defined by exposed opposite planar surfaces and a peripheral edge extending therearound, attachment means located on the peripheral edge along one side of the strip attaching the strip in an upstanding position extending outwardly substantially normal to one of the opposite surfaces of the fan blade to which it is attached and from an intermediate position of said one opposite surface of the fan blade whereby at least one of the planar opposite strip surfaces sweeps air moving over the one surface of the fan blade to which it is attached during rotation of the fan blade.
Claim 2
Dependent Claim
156 words
An air filter attached to a surface of a fan blade which has relatively wide opposite surfaces comprising an elongated strip of relatively thin rigid porous material capable of having air pass therethrough while trapping airborne particles borne by the air, said strip being relatively thin compared to the width of the surfaces of the fan blade and being defined by exposed opposite planar surfaces and a peripheral edge extending therearound, attachment means located on the peripheral edge along one side of the strip attaching the strip in an upstanding position extending outwardly substantially normal to one of the opposite surfaces of the fan blade to which it is attached and from an intermediate position of said one opposite surface of the fan blade whereby at least one of the planar opposite strip surfaces sweeps air moving over the one surface of the fan blade to which it is attached during rotation of the fan blade.
Claim 3
Dependent Claim
19 words
The air filter of claim 1 wherein said elongated strip is constructed from an open pore polymeric foam material.
Claim 4
Dependent Claim
15 words
The air filter of claim 1 wherein said elongated strip is constructed from shreaded polyethylene.
Claim 5
Dependent Claim
17 words
The air filter of claim 1 wherein said elongated strip has an odor absorbing material impregnated therein.
Claim 6
Dependent Claim
16 words
The air filter of claim 1 wherein said elongated strip has a substantially rectangular cross-sectional shape.
Claim 7
Dependent Claim
14 words
The air filter of claim 1 wherein the attachment means are adhesive attachment means.
Claim 8
Dependent Claim
63 words
The air filter of claim 6 wherein the adhesive attachment means include an adhesive strip having opposite surfaces and adhesive substance on each of said opposite surfaces, the adhesive on one of said opposite surfaces being attached to the one side edge of the elongated strip and the adhesive on the other opposite surface for attaching to a surface of a fan blade.
Claim 9
Dependent Claim
23 words
The air filter of claim 7 including a removable protective member covering the adhesive on the other opposite surface of the adhesive strip.
Claim 10
Dependent Claim
138 words
Air filtering means in combination with a ceiling fan unit comprising a filter strip, said filter strip being a relatively thin rigid planar member having opposite surfaces and at least one substantially straight side edge and being constructed from a relatively porous material, and an elongated tape having opposite surfaces each having an adhesive thereon, one surface of said tape being adhesively attached to said filter strip along the straight side edge thereof, the opposite surface of said tape attaching the filter strip on edge to an intermediate location on a fan blade whereby the strip stands out from the blade substantially normal to the surface to which it is attached so that said strip can sweep and filter air moving over the blade and against one of the planar surfaces of the strip as the blade rotates.
Claim 11
Dependent Claim
138 words
Air filtering means in combination with a ceiling fan unit comprising a filter strip, said filter strip being a relatively thin rigid planar member having opposite surfaces and at least one substantially straight side edge and being constructed from a relatively porous material, and an elongated tape having opposite surfaces each having an adhesive thereon, one surface of said tape being adhesively attached to said filter strip along the straight side edge thereof, the opposite surface of said tape attaching the filter strip on edge to an intermediate location on a fan blade whereby the strip stands out from the blade substantially normal to the surface to which it is attached so that said strip can sweep and filter air moving over the blade and against one of the planar surfaces of the strip as the blade rotates.
Claim 12
Dependent Claim
21 words
The air filtering means of claim 9 including a removable protective member covering the adhesive on one surface of said tape.
Claim 13
Dependent Claim
20 words
The air filtering means of claim 9 wherein said filter strip is constructed of a polymeric open pore foam material.
Claim 14
Dependent Claim
16 words
The air filtering means of claim 9 wherein said filter strip is constructed from shreaded polyethylene.
Claim 15
Dependent Claim
17 words
The air filtering means of claim 9 wherein the filter strip is impregnated with a charcoal material.
Claim 16
Dependent Claim
16 words
The air filtering means of claim 9 wherein said filter strip is substantially rectangular in shape.
Claim 17
Dependent Claim
18 words
The air filtering means of claim 9 wherein the filter strip is impregnated with an odor absorbing material.
Claim 18
Dependent Claim
119 words
Air filter means attached to a surface of a fan blade comprising a relatively thin rigid member constructed of a porous material, said member having closely spaced planar opposite surfaces which permit air to pass therethrough and a peripheral side edge, one portion of which includes means attaching the member on edge to the surface of the fan blade in an upstanding position extending outwardly therefrom substantially normal to the surface of the fan blade to which it is attached and at an intermediate location on the blade surface whereby some of the air moving over the blade and against one of the planar surfaces of the planar member when the blade rotates will pass therethrough and be filtered.
Claim 19
Dependent Claim
119 words
Air filter means attached to a surface of a fan blade comprising a relatively thin rigid member constructed of a porous material, said member having closely spaced planar opposite surfaces which permit air to pass therethrough and a peripheral side edge, one portion of which includes means attaching the member on edge to the surface of the fan blade in an upstanding position extending outwardly therefrom substantially normal to the surface of the fan blade to which it is attached and at an intermediate location on the blade surface whereby some of the air moving over the blade and against one of the planar surfaces of the planar member when the blade rotates will pass therethrough and be filtered.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |