US 3698308 A
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United States Paten N avara a 154] FILTER SYSTEM FOR WINDOWS  Inventor: Joseph Navara, 2105 West Walton Street, Chicago, 111. 60622  Filed: May 28, 1970  Appl. No.: 41,191
 11.8. CI. ..98/99 R  Int. Cl. ..E06b 7/08  Field of Search ..98/99 R, 99 A, 99.1, 99.2,
[5 6] References Cited UNITED STATES PATENTS 1,764,913 6/1930 Vandc Mark ..98/99.8 X 2,928,334 3/1960 Van de Veirem; ..98/99.8 X
[4511 Oct. 17, 1972 2,775,001 12/1956 Baker ..98/99.8 1,402,101 l/1922 Smith ..98/99 2,179,954 11/1939 Burke ..98/99.1 X
Primary Examiner-Arthur D. Kellogg Attorney-Stone, Zummer & Aubel 5 7] ABSTRACT A window filter system providing filter means positionable in window frames adjacent opened windows for providing a cooling air flow to the associated room. Filter units are provided at both the top and bottom of the window frame to provide air circulation.
The system is a passive system in that no mechanical parts are utilized for blowing air in or out of the room.
' 1 Claim, 16 Drawing Figures PATENTED I 7 2 3 6 98 3 O8 sum 1 [IF 3 P'A'TENTEDum n 1922 V sum 2 or 3 Wil a? JVaVa/w/ 44446 PATENTEDnm 17 1912' 3.698.308
' sum 3 or 3 FILTER SYSTEM FOR WINDOWS Window filter units are known in the art which provide a freshening, cooling and conditioning of the air within the room by either blowing cold air into the room and/or exhausting warm air out of the room. Also, filter units are known which are positioned in window ledges for permitting air to enter into a room.
My invention provides an improvement over existing systems in providing a unit wherein air is admitted into the room along the lower portion of the window frame and warm air permitted to exit from the top portion of the window frame, and convection currents in the air provide the means for providing a circulation of the air within the room.
Accordingly, it is a principal object of the present invention to provide an improved apparatus and system for providing a means of cooling air within a room.
It is another object of the present invention to provide a passive apparatus and system for cooling air within a room.
It is another object of the present invention to provide an inexpensive window filter unit that is convenient to install.
It is still another object of the present invention to provide a filter unit which inhibits rain from entering into the interior of the window.
It is a further object of the present invention to provide a filter which can be locked into position for purposes of safety.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention as illustrated in the accompanying drawings wherein:
FIG. 1 shows an outside or back view of the window unit filter system according to the invention;
FIG. 2 shows an inside or front view of the window unit filter system of the present invention;
FIG. 3(a) shows an isometric view of an elongated rod for use in the subject filter system, and
FIG. 3(1)) shows an isometric view of a rain shield for use with the subject system;
FIG. 4 shows a view of one embodiment of the filter unit of the invention having outstanding tabs for securing the filter unit in the frame of the window;
FIG. 5 shows a cross sectional view of the window unit filter system of the present invention taken along lines 55 of FIG. 2;
FIG. 6 shows an isometric view partially in section of a filter positioned in a window frame;
FIG. 7 shows an isometric view of a Z-shaped rain shield for use with the filter such as shown in FIG. 6;
FIG. 8 shows an isometric view of a filter locking device for a filter;
FIG. 8A is an isometric view of a second filter locking device for a filter;
FIG. 9 shows a front view partly in section of the filter locking device of FIG. 8;
FIG. 10 is a side view partly in section of the locking device shown in FIGS. 8 and 9;
FIG. 11 is a view showing a modification of the filter unit wherein slide panels are positioned in the filter to controllably open and close the filter to air passing therethrough;
FIG. 12 is a top view of the unit of FIG. 11;
FIG. 13 is an isometric view of a wedge-shaped member for holding the window open;
FIG. 14 is a showing of the window unit of the invention as applied to a wooden frame wherein a lock comprising a turnbuckle is used to lock the window in position against the filter; and
FIG. 15 shows a modification of the side panel flange of FIGs. 4 and 6.
Referring now to the various figures, the filter system 11 in accordance with my invention comprises two fil ters generally labeled 13 with the top filter being labeled 13A and the lower filter labeled 13B. The filters 13A and 13B are similar in construction and each comprises an outside surface having a perforated metal back with downwardly depending flanges 19 which enable air to pass therethrough and yet prevent rain from entering the filter 13 (see FIG. 1); and, an inside surface having a filter mesh construction 17 through which air passes.
In one embodiment, a charcoal-type mesh construction for the lower filter 13B is providedfor purposes of better cleansing of the air passing therethrough.
The filters 13A and 13B are placed respectively at the top and bottom of the window frame. In the embodiment of FIGS. 1 and 2, a metal frame 14 is employed and the windows shown are so-called storm windows. Filter 13A is pushed upwardly into position by the upper sash of window 21 and filter 13B is pushed downwardly by the lower sash of window 23 to maintain the filter in position. A locking device 25, which will be explained in more detail hereinbelow, is placed against the top sash of window 23 and against the bottom sash of window 21 to push the windows in a secure position against the filters 13A and 13B.
FIG. 4 shows the side sleeves 27 which are placed on the ends of the filters l3 and are movable inwardly and outwardly of filter 13 to adjust the overall width of the filter 13 to conform to the width of the window frame. Side tabs 29 are mounted on each of the sleeves 27 to extend laterally of the side edge of the filter 13. Tabs 29 are inserted in the grooves of the window frame to thereby hold filter l3 securely in the window frame to prevent its being pushed inwardly such as by high winds. In FIG. 4, the tabs 29 are rigidly affixed to sleeves 27, as by rivets, and tabs 29 are made of a metal and thickness which will permit the tabs 29 to be bent as by hand to suitably insert and position the tabs 29 in the grooves of the window frame.
FIG. 11 shows an isometric view of a filter 13 in accordance with the invention wherein movable tabs 34 are mounted on the sleeve 27. Tabs 34 perform the same function as tabs 29; that is, tabs 34 lock filter 13 in the window frame. Tabs 34 are rotatably affixed to sleeve 27 as by a single rivet to permit the tabs 34 to rotate to permit easier insertion and positioning of the tabs 34 in its associated groove. A stop 34A arrests downward movement of the tabs 34 such as to prevent tabs 34 from falling downwardly out of engagement with the sides of its associated groove. In FIG. 11, the filter 13 also includes slidable panels 49, such as of plastic, positioned adjacent the mesh portion of filter 13. These panels 49 can be slidably closed or opened as desired to emit more or less air into the room as required to maintain a desired temperature in the room.
FIG. 15 shows a side panel 27 wherein another modification of the tab 61 is affixed to the panel. Tab 61 is affixed as by riveting the end of panel 27. Tab 61 can be bent inwardly or outwardly to snug the panel 27 in the associated groove of the window frame to secure the filter 13 in position.
To prevent rain from entering through the filter 13 into the room, an elongated wedge-shaped shield, generally labeled 31 and made of a thin flat material such as a copper strip, is placed between the filter l3 and the window sash. Shield 31 includes a vertical portion 31A, a flat horizontal portion 313 extending from said vertical portion 31A and a portion 31C depending downwardly from horizontal portion 318. Shield 31 is positioned as shown in FIG. 6 to have its flat horizontal position clamped between the filter l3 and the bottom sash of window 21. The vertical portion 31A is on the inside of the filter and downwardly depending portion 31C is on the outside of the window frame. Thus, a rain tending to flow through the opening between the bottom of filter 13 and the window frame will be stopped by vertical portion 31A. The depending portion 31C firmly anchors the shield in position. The width of horizontal portion is formed dependent on the thickness of the associated window sash. Shield 31 may comprise either one elongated piece or overlapping parts with the overlapping parts being extended to conform to the width of the associated window frame.
A flat rod 35, of wood or plastic, having slots 35A at its ends may be positioned beneath the flat surface of the shield 31 in order to insure that the rod fits flush over the filter. This is necessary in certain instances where the sash of the window 21 has side pins (not shown) which hook the window 21 onto its frame. The pins extend horizontally along the top and at the edges of the window sash. The slots 35A fit over the aforesaid pins to hold rod 35 in position. Rod 35 provides a smooth, even support surface for shield 31, and permits the shield 31 to extend evenly along the length of filter 13.
Referring now to FIGS. 8, 8A, 9 and 10, the locking devices 25 and 25A comprise a sleeve member 61 which receives an elongated bolt 63 which can be adjusted by means of a nut 65 to secure the locking device 25 against the filter 13, as shown in FIG. 5. The top of the locking device 25 includes a U-shaped channel 67 which receives or fits over the sash of the window frame, see also FIGS. 1 and 2. A lower or back portion 69 is affixed to the upper channel 67 as by welding and is pivotably affixed as by a bolt 72 to the sleeve 61. The lower portion of the bolt 63 includes a means for removably affixing the locking device 25 in the window frame, as shown in FIG. 5. The lower end of bolt 63 terminates in a ring 70. A flange 71 has one side affixed, as by welding, to ring 70 and the lower end of flange 71 is free and extends to the bottom of ring 70. Flange 71 and ring 70 are inserted such as to straddle a vertical ledge of the window frame, as shown in FIG. 5, to thus hold the lower end of the locking device 25 in position. Locking device 25A is generally similar to locking device 25 with the exception that in locking device 25A, instead of flange 71, a block 74 is loosely affixed to the ring 70 as by a U-bolt. The drawing of FIG. 8A is inverted relative to FIG. 8 to show the locking device in the position in which it is normally used. For example, note FIG. 5, wherein block 74 is positioned in a groove in the window frame to hold the upper end of locking positioned to engage the sash of the respective window, and nut 65 tightens the bolt 63 against sleeve 61 to firmly push the window sash against the respective filters 13A and 13B to thus hold the filter securely in position.
Thus, as clearly seen, .in FIG. 5, the two locking devices 25 and 25A, respectively, retain the two filters 13A and 13B in position.
FIG. 13 shows a wedge-type unit 51 which can be mounted in the frame to mount the windows 21 and 23 at a selected height on the frame.
FIG. 14 shows a modification of the filter system of FIGS. 1 through 13 wherein the filter is utilized in connection with wooden, so-called balanced windows. Except for some minor variations, the two systems are similar. In FIG. 14, a modified locking device 53 is utilized in place of the locking device 25. Whereas, locking device 25 pushes against the associated windows to hold them in position, the locking device 53 comprises a turnbuckle and is mounted by screw 57 to the window frame and by screw to the wooden top sash of window 59. Screw 55 is secured to the wooden window frame and an L-shaped rain shield 32A, formed of a copper plate, as shown in FIG. 3(b), is placed between the lower sash of balanced window 59 and the window frame.
In order to maintain the wooden window frame securely against filter 13A, the turnbuckle 53 is tightened to snug the filter in position. A similar turnbuckle 53 (not shown) is utilized for the lower window 62 and the associated filter 13B. In some instances, the
.window 62 is sufficiently heavy such that the weight of the lower window on the filter 13B is sufficient to maintain the filter 138 in position and the turnbuckle locking device 53 is not required.
While the invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
1. A balanced window air filter system for an associated room, comprising, in combination, an air filter placeable in the window frame enabling air to flow therethrough into the room, a ledge on said window frame, an elongated rod for retaining the filter in position, said rod including a threaded portion on one end thereof, a sleeve member for said threaded portion, means on one end of said sleeve member for engaging said window, a nut mounted on said threaded portion and adapted to abut against the other end of the sleeve member, to secure the sleeve member against said window, a flange and a ring formed on the opposite end of said rod, said flange being adapted to straddle the ledge of the window frame to hold the end of the locking device in position whereby the filter can be securely affixed relative to a window independently of the other window.