US3675402A - Adjustable filter assembly - Google Patents
Adjustable filter assembly Download PDFInfo
- Publication number
- US3675402A US3675402A US91236A US3675402DA US3675402A US 3675402 A US3675402 A US 3675402A US 91236 A US91236 A US 91236A US 3675402D A US3675402D A US 3675402DA US 3675402 A US3675402 A US 3675402A
- Authority
- US
- United States
- Prior art keywords
- frame
- frame assembly
- frame members
- filter material
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/31—Filter frame
Definitions
- ABSTRACT Afmmeaaemblyforafilterorthelikewhichisadaptedtobe inserted inapenuresofbuildings suchaswindowa ordoorsor SSIDIG. 3
- , l60/374 [51] [It 39/08 m -11. m ism] ad-mbkintwo 5a mam......... >49/
- a filtering material is disposedwithintheframeassemblyandisprovidedwitha retaining screen at each of its major surfaces.
- This invention relates to a frame assembly and more particularly to a frame assembly for a filter for purifying air and other fluid media, with particular emphasis on purifying the air moving into a building.
- the filters presently available have frame assemblies which generally fall into two basic categories.
- the first category consists of the type wherein the frame elements are made of a structurally rigid material such as wood or metal. Due to the inherent strengths associated with such materials little or no reinforcing is required at the interconnecting junctures of the frame elements, even when the frame elements are relatively movable for adjustment purposes.
- Typical examples of such type of frame elements are shown in U. S. Pat. No. 2,175,903 to Lichtman and U. 5. Pat. No. 2,624,405 to Lynch.
- the strength of the material used in the frame elements is sufficient to resist significant flexion in the vicinity of the telescopically adjustable portions of the frame assembly.
- locking clamp assemblies are provided at the telescopically adjustable portions of the frame assembly, their purpose is merely to fix the relative position of the various frame elements with respect to each other and they provide little or no structural reinforcement to the frame assembly because the frame assembly is already sufficiently strong for its diverse applications.
- the second category consists of the type wherein the frame elements are made ofa less expensive and less rigid material such as cardboard or the like. Typical examples of such type of frame elements are shown in US. Pat. No. 3,237,387 to Haugen et al. and U. S. Pat. No.
- a filter be designed which is adjustable to fit different size building apertures, be inexpensive, and be reasonably durable, and since in many ap plications it will be exposed to the elements, it is desirable that it also be weatherproof. It is with such objects in mind that the instant invention was perceived.
- an adjustable frame assembly which is capable of accommodating a filtering material and a plurality of retaining screens for the filtering material.
- the frame assembly may also be fabricated of other materials including plastic, wood, metal, or any combination of such materials.
- FIG. 1 a perspective view of a filter apparatus employing the frame assembly disposed within the aperture of a slidable window or door of a building.
- FIG. 2 is shown a perspective view of a filter apparatus employing the telescopically adjustable frame assembly.
- FIG. 3 is shown an enlarged cross section view taken along the line 33 of FIG. 2.
- Fig. 4 is shown a perspective view of the clamp for retaining and strengthening the frame assembly.
- a filter employing the telescopically adjustable frame assembly shown generally at 10, is shown in use disposed within and abutting the framework 21 of the aperture of a building 23 and being abutted at one edge by a slidable partition 21 associated with the framework, which partition may take fon'n of a slidable door or window or the like.
- An edge sealer (not shown), such as tape, may be employed to seal the joints between the building framework and partition and the frame assembly.
- the frame assembly comprises four L shaped frame elements ll, l2, 13, 14 which are telescopically interfitted to form a parallelogram.
- Each frame element is channel shaped, having an opening along its length to receive a sheet of filter material 16, preferably fibrous but it may be of other known types, and retaining screens 15 which are positioned on both sides of the filter material to keep it from billowing.
- the adjacent frame elements have their mating portions in slightly different sizes (see Fig. 3) to allow for the telescopic effect.
- the frame element material is a cellulose based material such as cardboard, paper or the like which is preferably weatherproofed in any well known manner such as by wax treating or the like.
- the frame elements may also be made of other materials as well, including plastic, wood or metal and a frame assembly may comprise a plurality of frame elements each of a different material.
- An elongate clamp 17 is provided at each of the telescopic portions of the frame assembly to both strengthen the frame assembly and retain the frame assembly in any desired predetermined size or shape within the confines of its adjustment limits.
- the clamp is preferably made of rigid plastic but other rigid materials including cardboard or other stiff cellulose based material or metal may also be used.
- the use of the elongate clamps 17 of this invention enable a lighter gauge material to be used than would normally be expected due to the geometry of the clamps, which are substantially longer than they are deep or wide.
- the clamp is shown to define an elongate channel 30 formed by first and second side walls 3] and an interconnecting base wall 32.
- the ends of the clamp are open to enable the clamp to slide over the frame elements being supported and retained thereby.
- the clamp extending substantially perpendicular from each side wall and second wall portions 34 extending substantially parallel to the first short wall portions 33 and substantially perpendicular to the base wall 32.
- the length of the first and second short wall portions is shown to be commensurate with the overall length of the clamp but it may be of a greater or lesser dimension as well.
- the dimensional extent of the first wall portions is such as to enable reasonably free slidable movement of the clamp along one frame element, and more limited movement along two adjacent frame elements forming a telescopic connection, with the retention of the overall telescopic connection occuring due to a friction fit between the inside surfaces of the clamp and the associated frame elements.
- the frame elements can be adjusted no more than the height of their side walls without exposing the edge of the filter material and screens.
- the limit of adjustability may be increased by cutting off equal portions of the filter material and screens to thereby allow the frame assembly to assume a much smaller size, or by providing a plurality of different size filter materials and screens which are selectively chosen in accordance with the particular aperture to be serviced.
- the frame assembly for the filter may take the shape of a triangle or other regular or irregular geometric configuration.
- each of the four comers of the frame assembly may be rounded or assume other shapes rather than at right angles, and the channel formed by the frame elements and clamps may be rounded or assume other shapes rather than squared off as shown.
- the elongate clamp may also take a hairpin form such as defined by walls 31, 33, 34 of Fig.
- the filter may be friction fitted or held in other ways to the frame assembly such as by rivits or crimpingv Further, where the particular aperture receiving the filter has insufi'lcient means to retain it, the filter may be provided with additional means for such purpose, such as mounting brackets or the like affixed to the frame assembly.
- An adjustable filter assembly for use in purifying air entering an aperture of a building comprising:
- a frame assembly comprising first and second cardboard frame members, each of said frame members comprising a first and second leg portion and an intermediary portion interconnecting said leg portion, the leg portions of the first frame member being interfitted with the leg portions of the second frame member to form a telescopically adjustable parallelogram, each of said frame members having a continuous recessed channel along its entire length facing the inner area defined by said parallelogram for receiving a filter material;
- first and second screens positioned on opposite sides of the fibrous filter material, each of said screens having their edge portions disposed within the channels of the frame members, for preventing billowing of the filter material during use;
- a pair of substantially rigid clamps each comprising a pair of parallel sidewalls connected together by a base portion for frictionally mating with an outer surface of said interfitted leg portions, and wherein the ends of the sidewalls farthest removed from the base portion are turned back and inward in hairpin configuration to frictionally engage an inside surface of the channel at the interconnections,
Abstract
A frame assembly for a filter or the like which is adapted to be inserted in apertures of buildings such as windows or doors or the like. The frame assembly is telescopically adjustable in two different directions for being accommodated by different size and shape apertures, and is provided with an elongate clamp at each telescopically adjustable portion for holding the adjustment and for rigidity and strength. A filtering material is disposed within the frame assembly and is provided with a retaining screen at each of its major surfaces.
Description
[l5] 3,675,402 51 July 11,1972
United States Patent 12] Inventor: m Rowan] Weed, 1600 s. M St,
Arlington, vi, 22202 Primary Examiner-Kenneth Downey Attorney-Edward I... Stolarun [22] Filed: Nov. 20, I970 [2|] Appl.No.: 91,236
ABSTRACT Afmmeaaemblyforafilterorthelikewhichisadaptedtobe inserted inapenuresofbuildings auchaswindowa ordoorsor SSIDIG. 3|, l60/374 [51] [It 39/08 m -11. m ism] ad-mbkintwo 5a mam...............49/|69; l60/372, 315; 55/524, were, am for hem! different in 55/519, 5m, 518, 521, ms. 31, 496 and shape mm and is Provided with an glow" damp at each teleseopically adjustable ponion for holding the ad- [56) References Cited uNmaD STATES PATENTS justrnent and for rigidity and strength. A filtering material is disposedwithintheframeassemblyandisprovidedwitha retaining screen at each of its major surfaces.
Henry. ...l60/372X 19 X 1 Chin, 4 Brawl! M 5 06 2.... O O I O C Q $5.3. Q 0 O x O O PKTENTEDJUL 1 1 m2 INVENTOI JOHN HOWARD WEED ATTOII HEY This invention relates to a frame assembly and more particularly to a frame assembly for a filter for purifying air and other fluid media, with particular emphasis on purifying the air moving into a building.
In apartment buildings constructed today, an inherent forced air flow occurs through each of the apartments in the building, usually due to the use of ventilation fans associated with ventilation ducts leading into each apartment in the building. In addition air flow occurs in the areas of the windows and doors of the apartment causing the undesirable result of deposits of dirt in the vicinity of such windows and doors. At the window, the dirt is usually deposited on the inside window ledge, while at the door, the dirt is usually caught at the base of the door in the carpeting, which acts as a filter letting the air pass through to the outside while catching the dirt. Such a situation is a problem requiring almost constant attention due to the rapid build-up of dirt deposits in these forced air situations, especially in urban areas which are always high in air pollution and which contain the majority of apartments.
Accordingly, it is desirable that the problem of dirt carried by the air flowing into these apartments be eliminated, such as by use of a filter.
In addition to this basic problem, another problem arises in the selection of a particular filter to overcome the basic problem. The filters presently available have frame assemblies which generally fall into two basic categories. The first category consists of the type wherein the frame elements are made of a structurally rigid material such as wood or metal. Due to the inherent strengths associated with such materials little or no reinforcing is required at the interconnecting junctures of the frame elements, even when the frame elements are relatively movable for adjustment purposes. Typical examples of such type of frame elements are shown in U. S. Pat. No. 2,175,903 to Lichtman and U. 5. Pat. No. 2,624,405 to Lynch. In the telescopically adjustable frame assemblies shown in these patents, the strength of the material used in the frame elements is sufficient to resist significant flexion in the vicinity of the telescopically adjustable portions of the frame assembly. Although locking clamp assemblies are provided at the telescopically adjustable portions of the frame assembly, their purpose is merely to fix the relative position of the various frame elements with respect to each other and they provide little or no structural reinforcement to the frame assembly because the frame assembly is already sufficiently strong for its diverse applications. The second category consists of the type wherein the frame elements are made ofa less expensive and less rigid material such as cardboard or the like. Typical examples of such type of frame elements are shown in US. Pat. No. 3,237,387 to Haugen et al. and U. S. Pat. No. 2,96$,l97 to Dow et al. These patents show cardboard type frame elements which are not adjustable relative to each other and which, if made adjustable, would have resulted in a structure which was inherently weak and would therefore have been inadequate for many filter applications. In summary, although cost factors indicate the desirability of a filter using a less expensive adjustable cardboard type frame, the mere inclusion of an adjustability feature in such a filter is self defeat ing due to the severe reduction in overall frame strength.
It would therefore be desirable that a filter be designed which is adjustable to fit different size building apertures, be inexpensive, and be reasonably durable, and since in many ap plications it will be exposed to the elements, it is desirable that it also be weatherproof. It is with such objects in mind that the instant invention was perceived.
in addition, it is an object of this invention to provide an improved frame asembly.
It is a further object of this invention to provide an improved apparatus for purifying air and other fluid mediums.
It is still a further object of this invention to provide an improved apparatus for filtering air passing through a building.
In accordance with the above stated objects, an adjustable frame assembly is provided which is capable of accommodating a filtering material and a plurality of retaining screens for the filtering material. A
or paper which is preferably weatherproofed such as by wax treating or by other diverse well known processes. The frame assembly may also be fabricated of other materials including plastic, wood, metal, or any combination of such materials.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of the invention as illustrated in the accompanying drawings.
In FIG. 1 is shown a perspective view of a filter apparatus employing the frame assembly disposed within the aperture of a slidable window or door of a building.
in Fig. 2 is shown a perspective view of a filter apparatus employing the telescopically adjustable frame assembly.
in Fig. 3 is shown an enlarged cross section view taken along the line 33 of FIG. 2.
in Fig. 4 is shown a perspective view of the clamp for retaining and strengthening the frame assembly.
Referring now to FIG. I. a filter employing the telescopically adjustable frame assembly, shown generally at 10, is shown in use disposed within and abutting the framework 21 of the aperture of a building 23 and being abutted at one edge by a slidable partition 21 associated with the framework, which partition may take fon'n of a slidable door or window or the like. An edge sealer (not shown), such as tape, may be employed to seal the joints between the building framework and partition and the frame assembly.
With reference to Figs. 2 and 3, the frame assembly comprises four L shaped frame elements ll, l2, 13, 14 which are telescopically interfitted to form a parallelogram. Each frame element is channel shaped, having an opening along its length to receive a sheet of filter material 16, preferably fibrous but it may be of other known types, and retaining screens 15 which are positioned on both sides of the filter material to keep it from billowing. The adjacent frame elements have their mating portions in slightly different sizes (see Fig. 3) to allow for the telescopic effect. The frame element material is a cellulose based material such as cardboard, paper or the like which is preferably weatherproofed in any well known manner such as by wax treating or the like. The frame elements may also be made of other materials as well, including plastic, wood or metal and a frame assembly may comprise a plurality of frame elements each of a different material.
An elongate clamp 17 is provided at each of the telescopic portions of the frame assembly to both strengthen the frame assembly and retain the frame assembly in any desired predetermined size or shape within the confines of its adjustment limits. The clamp is preferably made of rigid plastic but other rigid materials including cardboard or other stiff cellulose based material or metal may also be used.
When employing the above referred to other materials for the frame elements, the use of the elongate clamps 17 of this invention enable a lighter gauge material to be used than would normally be expected due to the geometry of the clamps, which are substantially longer than they are deep or wide.
With reference to FIG. 4, the clamp is shown to define an elongate channel 30 formed by first and second side walls 3] and an interconnecting base wall 32. The ends of the clamp are open to enable the clamp to slide over the frame elements being supported and retained thereby. ln addition, the clamp extending substantially perpendicular from each side wall and second wall portions 34 extending substantially parallel to the first short wall portions 33 and substantially perpendicular to the base wall 32. The length of the first and second short wall portions is shown to be commensurate with the overall length of the clamp but it may be of a greater or lesser dimension as well. The dimensional extent of the first wall portions is such as to enable reasonably free slidable movement of the clamp along one frame element, and more limited movement along two adjacent frame elements forming a telescopic connection, with the retention of the overall telescopic connection occuring due to a friction fit between the inside surfaces of the clamp and the associated frame elements.
With reference to the adjustability feature of the instant invention, it is apparent that with a particular sheet size for the filter material and associated screens, the frame elements can be adjusted no more than the height of their side walls without exposing the edge of the filter material and screens. However, the limit of adjustability may be increased by cutting off equal portions of the filter material and screens to thereby allow the frame assembly to assume a much smaller size, or by providing a plurality of different size filter materials and screens which are selectively chosen in accordance with the particular aperture to be serviced.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that changes in form and details may be made thereto without departing from the spirit and scope of the invention. For example, the frame assembly for the filter may take the shape of a triangle or other regular or irregular geometric configuration. In addition, each of the four comers of the frame assembly may be rounded or assume other shapes rather than at right angles, and the channel formed by the frame elements and clamps may be rounded or assume other shapes rather than squared off as shown. The elongate clamp may also take a hairpin form such as defined by walls 31, 33, 34 of Fig. 4, which may be friction fitted or held in other ways to the frame assembly such as by rivits or crimpingv Further, where the particular aperture receiving the filter has insufi'lcient means to retain it, the filter may be provided with additional means for such purpose, such as mounting brackets or the like affixed to the frame assembly. There fore, it is not intended to limit the scope of the present invention to the above described preferred embodiment, but that scope should only be determined by the following claims.
What is claimed and desired to be secured by Letters Patent Is:
1. An adjustable filter assembly for use in purifying air entering an aperture of a building comprising:
a frame assembly comprising first and second cardboard frame members, each of said frame members comprising a first and second leg portion and an intermediary portion interconnecting said leg portion, the leg portions of the first frame member being interfitted with the leg portions of the second frame member to form a telescopically adjustable parallelogram, each of said frame members having a continuous recessed channel along its entire length facing the inner area defined by said parallelogram for receiving a filter material;
a sheet of fibrous filter material contained within the confines of the frame assembly and having its edge portions disposed within the channels of the frame members;
first and second screens positioned on opposite sides of the fibrous filter material, each of said screens having their edge portions disposed within the channels of the frame members, for preventing billowing of the filter material during use; and
a pair of substantially rigid clamps, each comprising a pair of parallel sidewalls connected together by a base portion for frictionally mating with an outer surface of said interfitted leg portions, and wherein the ends of the sidewalls farthest removed from the base portion are turned back and inward in hairpin configuration to frictionally engage an inside surface of the channel at the interconnections,
wall and the base portion than along its width or height.
1 I l i i
Claims (1)
1. An adjustable filter assembly for use in purifying air entering an aperture of a building comprising: a frame assembly comprising first and second cardboard frame members, each of said frame members comprising a first and second leg portion and an intermediary portion interconnecting said leg portion, the leg portions of the first frame member being interfitted with the leg portions of the second frame member to form a telescopically adjustable parallelogram, each of said frame members having a continuous recessed channel along its entire length facing the inner area defined by said parallelogram for receiving a filter material; a sheet of fibrous filter material contained within the confines of the frame assembly and having its edge portions disposed within the channels of the frame members; first and second screens positioned on opposite sides of the fibrous filter material, each of said screens having their edge portions disposed within the channels of the frame members, for preventing billowing of the filter material during use; and a pair of substantially rigid clamps, each comprising a pair of parallel sidewalls connected together by a base portion for frictionally mating with an outer surface of said interfitted leg portions, and wherein the ends of the sidewalls farthest removed from the base portion are turned back and inward in hairpin configuration to frictionally engage an inside surface of the channel at the interconnections, each of said clamps being substantially longer in the direction of the line formed by the intersection of a side wall and the base portion than along its width or height.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US9123670A | 1970-11-20 | 1970-11-20 |
Publications (1)
Publication Number | Publication Date |
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US3675402A true US3675402A (en) | 1972-07-11 |
Family
ID=22226737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US91236A Expired - Lifetime US3675402A (en) | 1970-11-20 | 1970-11-20 | Adjustable filter assembly |
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Country | Link |
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US (1) | US3675402A (en) |
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3012283A1 (en) * | 1980-03-29 | 1981-10-01 | Artur 3012 Langenhagen Tatarczyk | Sliding window or door ventilation - involves slotted bar or rail mounted in wall opening or blind frame |
US4708724A (en) * | 1986-05-12 | 1987-11-24 | Gertrude B. F. Agnew | High efficiency particulate air filter and separators, therefor |
US4801317A (en) * | 1986-05-12 | 1989-01-31 | Agnew Boyd F | High efficiency particulate air filter and separators |
US5087276A (en) * | 1991-01-15 | 1992-02-11 | Rolox Ltd. | Method and apparatus for user sizable furnace filter and holder |
US5167677A (en) * | 1990-06-06 | 1992-12-01 | Firma Icleen Entwicklungs-Und-Vertriebsanstalt Fur Umweltprodukte | Variable air filter system for convection and ventilation air flows |
US5188646A (en) * | 1992-03-05 | 1993-02-23 | Air Kontrol, Inc. | Adjustable air filter |
WO1994009884A1 (en) * | 1992-10-23 | 1994-05-11 | Michael Wolfe | Window air filter assembly |
US5364458A (en) * | 1993-03-18 | 1994-11-15 | Dust Free, Inc. | Adjustable air filtering device |
US5368622A (en) * | 1993-08-27 | 1994-11-29 | Mcmillon; Donald C. | Air conditioner filter frame |
US5492551A (en) * | 1992-10-23 | 1996-02-20 | Wolfe; Michael | Air filter assembly |
US5681630A (en) * | 1994-01-10 | 1997-10-28 | Smick; Gary L. | Air intake filter for electric appliances |
DE19633735A1 (en) * | 1996-08-21 | 1998-04-09 | Rolf Gerisch | Flexible window film with filter elements |
US5772713A (en) * | 1996-05-30 | 1998-06-30 | Salinas; Irma C. | Adjustable filter assembly |
DE19708262A1 (en) * | 1997-02-28 | 1998-09-10 | Ernst Dipl Ing Hohrenk | Access door or window system for house for controlling access by domestic pets |
US5837022A (en) * | 1997-05-19 | 1998-11-17 | Chapman; Rick L. | High efficiency air filter system |
US6007596A (en) * | 1996-11-05 | 1999-12-28 | Rosen; Richard M. | Adjustable air filter kit |
US20040033333A1 (en) * | 2000-10-26 | 2004-02-19 | Schroeder Andreas | Use of a napped, planar textile structure as protection against pollen for windows and doors |
US20040065029A1 (en) * | 2002-10-04 | 2004-04-08 | Marlina Morris | Removable portable window, or sliding door air filter |
US20060096261A1 (en) * | 2004-11-09 | 2006-05-11 | Dong Zhang | Air duct filter assembly with identical and color coded air filter |
US20080216456A1 (en) * | 2007-03-05 | 2008-09-11 | Williams Kevin D | Filter apparatus and method |
US20080290244A1 (en) * | 2007-05-25 | 2008-11-27 | Albright John W | Window Air Filter Apparatus and Method |
US20090183473A1 (en) * | 2008-01-18 | 2009-07-23 | Hui Wing-Kin | Universal frame for use with a fabric filter |
US7811346B1 (en) * | 2002-06-28 | 2010-10-12 | Joseph Clarence Henson | Filter housing |
US20100288455A1 (en) * | 2009-05-15 | 2010-11-18 | Tanya Liscano | Window screen |
US8118919B1 (en) * | 2007-12-06 | 2012-02-21 | Love George W | Air filter and method of constructing same |
US20150240554A1 (en) * | 2012-12-18 | 2015-08-27 | Lg Hausys, Ltd. | Window having ventilation structure |
WO2016032930A1 (en) * | 2014-08-25 | 2016-03-03 | 3M Innovative Properties Company | Window air filter |
US20160184754A1 (en) * | 2014-12-30 | 2016-06-30 | Chan Seng CHOY | System for providing flow of filtered air |
US9682339B2 (en) | 2015-01-23 | 2017-06-20 | Rps Products, Inc. | Collapsible filter with support structure |
USD815725S1 (en) * | 2016-01-25 | 2018-04-17 | Lance Burkhart | Filter support |
US10286351B2 (en) | 2017-04-19 | 2019-05-14 | Rps Products, Inc. | Filter with flexible side seal |
US10619389B2 (en) | 2016-12-20 | 2020-04-14 | Radio Systems Corporation | Pet door having insulating flap |
US10750714B2 (en) | 2017-08-18 | 2020-08-25 | Radio Systems Corporation | Electronic pet door |
US10941611B2 (en) | 2017-08-18 | 2021-03-09 | Radio Systems Corporation | Pet door |
US11002006B2 (en) * | 2015-12-10 | 2021-05-11 | Smart Vent Products, Inc. | Flood vent having a panel |
US11274491B1 (en) * | 2016-07-08 | 2022-03-15 | Ricardo Fernandez | Pet door and detachable window systems |
US11866991B1 (en) | 2016-07-08 | 2024-01-09 | Ricardo Fernandez | Detachable door systems |
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GB842527A (en) * | 1958-06-13 | 1960-07-27 | Metals Disintegrating Co | Gas filters |
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US14360A (en) * | 1856-03-04 | johnson | ||
GB842527A (en) * | 1958-06-13 | 1960-07-27 | Metals Disintegrating Co | Gas filters |
US3075334A (en) * | 1959-12-18 | 1963-01-29 | American Air Filter Co | Unit filter assembly |
Cited By (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3012283A1 (en) * | 1980-03-29 | 1981-10-01 | Artur 3012 Langenhagen Tatarczyk | Sliding window or door ventilation - involves slotted bar or rail mounted in wall opening or blind frame |
US4708724A (en) * | 1986-05-12 | 1987-11-24 | Gertrude B. F. Agnew | High efficiency particulate air filter and separators, therefor |
US4801317A (en) * | 1986-05-12 | 1989-01-31 | Agnew Boyd F | High efficiency particulate air filter and separators |
US5167677A (en) * | 1990-06-06 | 1992-12-01 | Firma Icleen Entwicklungs-Und-Vertriebsanstalt Fur Umweltprodukte | Variable air filter system for convection and ventilation air flows |
US5087276A (en) * | 1991-01-15 | 1992-02-11 | Rolox Ltd. | Method and apparatus for user sizable furnace filter and holder |
USRE35236E (en) * | 1992-03-05 | 1996-05-14 | Air Kontrol, Inc. | Adjustable air filter |
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