1. Technical Field
The invention relates generally to filter assembly for filtering fluid entering an intake of a device. More particularly, the invention relates to a filter assembly for a heating unit. Specifically, the invention relates to a filter assembly having a first and a second filtration element, with the first filtration element being disposed adjacent the intake on the heating unit and the second filtration element being selectively detachable from the first heating unit as well as permitting independent removal of one or both of the first and second filtration elements.
2. Background Information
Filters are used in a variety of different applications, including in filtering air and liquids in automobiles and home heating and cooling units. A particulate filter is a device which is used to remove particles such as dust, mold, pollen and bacteria from the air. Traditional particulate filters come in a variety of forms including foam, HEPA, pleated, paper, cotton fiber, and other styles. For example, household furnaces require that air entering an intake to the machine be filtered. The filter cannot be provided directly across the intake because access to that location is limited and there is frequently insufficient room adjacent the intake to position the filter. The furnace is therefore provided with ductwork that extends from adjacent the intake to a housing in a remote location therefrom. Any one of the traditional type of particulate filters is inserted across an opening in the housing. A cover is provided to restrict access to the opening and to the filter disposed therein. In order to replace the filter, the user must first remove the protective cover to gain access to the filter. Once the filter has been replaced, the cover is replaced and the furnace can be used once again.
In even more compact quarters it is difficult to provide a housing for a filter and to provide ductwork to connect the housing to the intake. In such instances it is even more difficult to use a second filter to further filter the intake air as even more ductwork needs to be provided to connect a housing for the second filter to the housing for the first filter. In addition, a dual filter setup makes it difficult to remove only one of the two filters it provides necessary to replace them. For example, the inner filter can only be removed by first removing the outer filter thereby making the filter removal cumbersome.
Fragrances are also generally known and used in various applications in homes and automobiles to improve the quality of the air. Fragrances can be provided in a number of forms including plug-in style housings which heat scented oil, candles, or chemicals which are sprayed or evaporated into the air. Specifically, air fresheners are generally localized, meaning that they are only disposed within a single room or within a cabin of a vehicle. Accordingly, a large number of air fresheners may be necessary in order to ensure that the scent is distributed throughout a room or a house.
The present invention broadly covers a filter assembly for filtering a fluid entering an intake of a device. The filter assembly includes a first filter frame that is engaged with the device adjacent the intake, a first filter disposed in the first filter frame, a second filter frame engaged with the first filter frame, and a second filter disposed in the second filter frame. When the filter assembly is positioned on the device, fluid entering the intake is drawn through one or both of the first and second filters.
The preferred embodiment of the invention, illustrative of the best mode in which Applicants have contemplated applying the principles of the invention, is set forth in the following description and is shown in the drawings.
At the outset, it should be appreciated that like drawing numbers on different drawing views identify identical, or functionally similar, structural elements of the invention. While the present invention is described with respect to what is presently considered to be the preferred embodiment, it is to be understood that the invention as claimed is not limited to the disclosed aspects.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this invention belongs. Although any methods, devices or materials similar or equivalent to those described herein can be used in the practice or testing of the invention, the preferred methods, devices, and materials are now described.
The filter assembly of the present invention is indicated generally at 12, and is shown in
Referring to
In accordance with a feature of the present invention, a mounting slot 82 (
First filter frame 25 further includes an upper containment wall 36 extending perpendicular to top wall 26 and opposite ridge 34. Similarly, bottom wall 28 includes a bottom containment wall 38, while first side wall 30 includes a containment wall 40, and second side wall 32 includes a containment wall 42. Containment walls 36, 38, 40 and 42 extend in direction opposite to ridge 34 relative to top wall 26. Consequently, containment walls 36, 38, 40, 42 reduce the outer perimeter of internal chamber 44. First filter 46 is retained in chamber 44 between ribs 78 and containment walls 36, 38, 40, 42. Furthermore, containment walls 36, 38, 40, 42 comprise a rear face 52 of primary filter assembly 24.
First filter frame 25 also includes a plurality of spacers 48 preferably arranged about the periphery of rear face 52 and extending outwardly and rearwardly therefrom. Spacers 48 are provided to create a gap between the rear face of first filter frame 25 and an object against which heating unit 14 may rest. Inasmuch as secondary filter assembly 50 is connected to primary filter assembly 24, spacers 48 are longer than secondary filter assembly 50 is deep. Advantageously, spacers 48 ensure that a sufficiently large enough gap is created between an object and secondary filter assembly 50 so that ambient air can be drawn into intake ports 20. This arrangement permits heating unit 14 to be backed against a wall or other surface and still ensure that the heating unit can take air into the intake ports 20.
Referring to
In accordance with yet another specific feature of the present invention, filter assembly 12 further includes coupling member 60 which secures primary filter assembly 24 and secondary filter assembly 50 together. Preferably, coupling member 60 is disposed so as to secure top wall 26 of first filter frame 25 to top wall 51a of second filter frame 51. It will, of course, be understood that primary and secondary filter assemblies 24, 50 could be secured together in locations that correspond to each other. Coupling member 60 comprises a retainer 64 and a pivot rod 62. Retainer 64 is provided on top wall 26 of first filter frame 25. Retainer 64 includes a pair of spacing arms 66 that extend upwardly and perpendicularly from top wall 26. A locking arm 68 extends forwardly and perpendicularly from a top end of each spacing arm 66. Referring specifically to
Pivot rod 62 is provided on top wall 51a of second filter frame 51. Pivot rod 64 extends outwardly and forwardly from a base 65 (
When first and second filter frames 25, 51 are secured together by coupling member 60, second filter frame 51 is pivotable about pivot rod 62 between a first position and a second position. In the first position, shown in
Advantageously, secondary filter assembly 50 is not removable from primary filter assembly 24 when rotated in the direction associated with arrow 76 less than the perpendicular position. Thus, secondary filter 88 can be removed if the second filter frame 51 is rotated at least approximately ninety degrees in the direction associated with arrow 72, but cannot be removed if frame 51 is rotated less than ninety degrees. Beneficially, this arrangement allows pivot rod 62 to freely pivot within aperture 70 but still remain secured to first filter frame 25 during any such movement.
Second filter frame 51 may also be completely detached from first filter frame 25. This is accomplished by rotating second filter frame 51 until it is at least perpendicular to the rear face of first filter frame 25 and then simply pushing second filter frame 51 forwardly toward heating unit 14. This motion will slide pivot rod 62 out of aperture 70 in coupling member 60. Second filter frame 51 may be attached to first filter frame 25 by reversing these steps.
In accordance with an aspect of the present invention, filter assembly 12 may be used to disseminate a fragrance into a room through heating unit 14. Referring to
In accordance with yet another feature of the present invention and referring to
Thus, filter assembly 12 provides air filtration and is also easily removable to replace the dual filters. The filter assembly 12 may also incorporate a second filter which is provided with a user-selected scent. Further, the second filter frame 51 is pivotably coupled with the first filter frame 25 and the second filter 88 and first filter 46 are only removable when the second filter frame 51 is pivoted approximately ninety degrees or more relative to first filter frame 25
It will be evident to one skilled in the art that a variety of changes can be made that are within the spirit and scope of the present invention. For instance, the second filter can be configured integral to the first filter and remedy the need for the second filter frame. The second filter frame can also be shaped and sized similar to first filter 46 to increase the scent effect. Further, the coupling member 60 between the first filter frame 25 and second filter frame 51 may be modified so long as the second filter frame still permits removal of first filter 46 from chamber 44 as well as second filter 88 from cavity 90 without having to disassemble the entire filter assembly 12.
Accordingly, the filter assembly is an effective, safe, inexpensive, and efficient device that achieves all the enumerated objectives of the invention, provides for eliminating difficulties encountered with prior art devices, systems, and methods, and solves problems and obtains new results in the art.
It will be understood that while the preferred embodiment of the invention is described specifically as being directed to an air filter assembly, the assembly could be used for filtering other fluids. So, for example, the filter assembly of the present invention could be used in applications double filtration of a liquid is required.
In the foregoing description, certain terms have been used for brevity, clearness, and understanding; but no unnecessary limitations are to be implied there from beyond the requirements of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed.
Moreover, the description and illustration of the invention is by way of example, and the scope of the invention is not limited to the exact details shown or described.
Having now described the features, discoveries, and principles of the invention, the manner in which the filter assembly is constructed and used, the characteristics of the construction, and the advantageous new and useful results obtained; the new and useful structures, devices, elements, arrangement, parts, and combinations are set forth in the appended claims.
This application claims priority from U.S. Provisional Application Ser. No. 61/267,305 filed Dec. 7, 2009, the entire specification of which is incorporated herein by reference.
Number | Date | Country | |
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61267305 | Dec 2009 | US |