System and method for mounting undercabinet ventilation hood

<u>BACKGROUND OF THE INVENTION</u>

<u>Field of the Invention</u>

0001The present invention pertains to the art of cooking and, more particularly, to a system and method for mounting a ventilation hood under cabinetry positioned above a cooking appliance.

<u>Description of the Related Art</u>

0002In the art of cooking, numerous types of cooking appliances are known, including both slide-in and drop-in ranges. Basically, both types of ranges are designed to be situated in a space or cut-out provided along a length of a kitchen countertop. In either case, the range includes at least one oven cavity supported below a cooktop. Of course, it is also known to separately mount cooktops, without lower oven cavities, in countertops. In any case, when the cooktop is utilized for cooking operations, a certain degree of smoke, grease or the like can be created. To counter the airborne nature of these byproducts, it is known to mount a ventilation unit above the range. Basically, such known ventilation units include an exhaust fan which functions to draw the smoke and other byproducts away from the cooktop. The byproducts are typically either directed to a vent external of the cooking area or filtered such that the cleansed air is simply expelled back into the cooking area. Such known ventilation units can take the form of a ventilation hood or can be incorporated into an overhead microwave oven mounted above the range. In many situations, the ventilation unit will also incorporate a light to aid in illuminating the cooktop.

0003In mounting a ventilation unit incorporated into a microwave oven to the bottom of a cabinet which is centered above and spans the appliance, it is commonplace to bolt the ventilation unit to a bottom cabinet panel. More specifically, a housing of the microwave oven is provided with spaced front and rear mounting holes and a template can be provided which enables an installer to mark drilling locations in the bottom panel of the cabinet, with the intent that the drilled holes will be aligned with pre-formed mounting holes in the unit. Assuming the proper alignment exists, the microwave oven can be held in a position beneath the upper cabinet and bolts inserted through each of the aligned hole sets to secure the microwave oven in place. In the case of a ventilation hood, the housing of the hood is typically used as a template for determining appropriate fastener locations and then filler strips are measured, cut and installed beneath the cabinet to complete lower framing needed to mount the ventilation hood.

0004Certain problems are considered to exist in each of these overall mounting arrangements. First of all, at least in the case ventilation units incorporated in microwave ovens, it is common for the template to take the form of a folded paper template which must be unfolded, cut to fit the underside of the upper cabinet and taped or otherwise retained in position to establish the drilling locations. Given that creases and improper cuts can contribute to misalignment issues, it is not uncommon for product manufacturers to recommend that significantly larger holes be drilled than needed to receive the bolts, and washers are provided to accommodate the enlarged holes. In this manner, a degree of tolerance is established to better assure potential alignment of each bolt with a designated hole in the ventilation unit. In the case of ventilation hoods, the measuring, cutting and mounting of filler strips can be quite tedious and time consuming, particularly if a professional installer is not employed. In both types of mounting arrangements, a second significant problem is that, after the holes are drilled and it is time to actually secure the ventilation unit, two people are required, one for holding the ventilation unit in place and the other for inserting and tightening at least a couple of the bolts. Certainly, given the confined space and the need to hold the unit around eyelevel for some time, this operation is less than desirable. <patcit id="pcit0001" dnum="US4011803A"><text>US 4011803 A</text></patcit> discloses a ventilation hood provided with a ductwork protruding from the top panel of the range-hood assembly, that needs to meet and adjoins continuing ductwork, which already exists in the above. For installing such ventilation hood a restraining system and a further fastening operation is described. <patcit id="pcit0002" dnum="US4580853A"><text>US 4580 853 A</text></patcit> discloses a mounting assembly for mounting a cooking appliance to the bottom of a kitchen cabinet for preventing excessive heating of the cabinet. A gap between the cabinet and the installed appliance is voluntarily created.

0005Although two people may be necessary for mounting a microwave, it is desired in accordance with the present invention to provide a method which enables a single user to readily install a ventilation hood over a cooking appliance through the use of a simplified and efficient installation system. single person to readily mount the ventilation hood to the cabinet. More specifically, each support bracket includes a main body from which depend at least one and, more preferably, first and second longitudinally spaced support tabs or hangers, as well as a locator tab. Alignment structure enables the main body to be easily positioned for mounting to the cabinet in a requisite manner, while the locator tab assures that the support bracket is positioned a required distance from a rear wall extending behind the cabinet. Once the support brackets are properly positioned, aligned and mounted, the ventilation hood can be positioned so that the support tab(s) is/are received in one or more slots formed in a top panel of the hood and, upon sliding the ventilation hood rearward, the hood rides upon ramped or tapered surface of each support tab to position the hood against the cabinet while hanging the hood from the support tab(s). Thereafter, the support tab(s) can be bent to retain the ventilation hood in an operational position. If desired, a mechanical fastener can be employed to secure each bent support tab to the ventilation hood.

0006In accordance with a further aspect of the invention, the support brackets are configured for use in mounting a ventilation hood beneath a frameless cabinet, i.e., a cabinet having supports above the bottom panel. In this situation, each support bracket is provided with one or more support tabs or hangers which project perpendicular to the main body. The main body is again aligned, either visually or through the use of spacers and positioned from the rear wall by the locator tab. In connection in a universal support bracket arrangement, the support tab(s) employed with mounting the ventilation hood on a cabinet including a lower frame can be used as the lateral spacers. In any case, once the support brackets appropriately mounted, a corresponding hanging and securing operation for the ventilation hood can be readily effected by a single person.

0007Additional objects, features and advantages of the invention will become readily apparent from the following detailed description of preferred embodiments of the invention when taken in conjunction with the drawings wherein like reference numerals refer to corresponding parts in the several views.

BRIEF DESCRIPTION OF THE DRAWINGS

0008<ul id="ul0001" list-style="none" compact="compact"><li><figref idref="f0001">Figure 1</figref> is a perspective view illustrating a ventilation hood mounted in accordance with the invention to cabinetry positioned above a range in a kitchen environment;</li><li><figref idref="f0002">Figure 2</figref> is a partial exploded view of a first stage in the mounting of the ventilation hood of <figref idref="f0001">Figure 1</figref> in accordance with the invention;</li><li><figref idref="f0003">Figure 3</figref> is a perspective view of an under cabinet support bracket mounting configuration employed in the invention;</li><li><figref idref="f0004">Figure 4</figref> is a lower perspective view of the ventilation hood of <figref idref="f0001">Figure 1</figref> in an initial mounting stage; and</li><li><figref idref="f0005">Figure 5</figref> is a lower perspective view of the ventilation hood in a final mounting stage.</li></ul>

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

0009With initial reference to <figref idref="f0001">Figure 1</figref>, a cooking appliance 2 is shown positioned in a cut-out or opening 5 provided in a countertop 8 and between adjacent lower cabinetry 12 and 13. Countertop 8 has an upper surface 17 extending to a rear upstanding wall 20. Above countertop 8 are shown wall cabinets 22 and 23 mounted on either side of cooking appliance 2, as well as a central cabinet 25 arranged above at least a portion of cooking appliance 2 and between cabinets 22 and 23.

0010Within the scope of the invention, cooking appliance 2 can take on various forms, including all fuel type ranges and built-in cooktops. However, in the exemplary embodiment illustrated, cooking appliance 2 is illustrated as a range including a cabinet or shell 30 which supports an oven cavity 33 located behind a door 35 having a handle 38 and a window 40. In a manner known in the art, door 35 can be pivoted to access oven cavity 33. Also, as shown, cooking appliance 2 includes a lower drawer 44 for use in storing pans and the like. In addition, cooking appliance 2 includes an upper control panel 51 having a central oven control section 54. Furthermore, control panel 51 is shown provided with a plurality of control knobs, one of which is indicated at 57, for regulating operation of upper cooktop heating elements or burners, such as that indicated at 61.

0011Particularly with the inclusion of the heating elements or burners 61, operation of cooking appliance 2 can produce smoke, grease or other airborne byproducts. To counter the potential detrimental effects of these cooking byproducts, it is desired to mount a ventilation hood 70 above cooking appliance 2, specifically to the underside of central cabinet 25 and between side wall cabinets 22 and 23, to draw in and either exhaust or filter and re-direct the associated flow of air. Certainly, ventilation hoods employed for this purpose are known in the art, but the present invention is particularly directed to a system and method for mounting ventilation hood 70, specifically a mounting arrangement which enables a single installer to readily and efficiently secure ventilation hood 70 to central cabinet 25.

0012In general, the operation of ventilation hood 70 is also known in the art. Therefore, apart from particular details set forth hereinafter, it should be recognized that the actual construction of ventilation hood 70 can vary from that depicted. Therefore, although ventilation hood 70 is shown to include a housing 72 and control knobs 74 and 75 for a fan and light (not shown) respectively, the invention is equally applicable to a wide range of other configurations. In connection with the mounting of ventilation hood 70, it should also be recognized that central cabinet 25 is also of known construction. That is, although the exact materials and construction can vary, central cabinet 25, as shown in <figref idref="f0002">Figure 2</figref>, includes a bottom panel or floor 79 and, in this depicted embodiment, a lower support frame 82, shown to include a rear flange piece 85, opposing side flange pieces 86 and 87, and a front flange piece 88. Each of rear, side and front flange pieces 85-88 defines a side portion as exemplified by side portion 89 for side flange piece 86.

0013In accordance with one aspect of the invention, support brackets are initially mounted at spaced locations beneath central cabinet 25, i.e., to the underside of cabinet 25. As the support brackets for the opposing sides of cabinet 25 are mirror images of each other, a detailed description of one side support bracket will now be made and it is to be understood that corresponding structure exists in connection with the other side bracket. More particularly, for the left side of cabinet 25 as shown in <figref idref="f0002">Figures 2</figref> and <figref idref="f0003">3</figref>, a support bracket 94 is shown to include an elongated main body 95 taking the form of a plate having a front end portion 97 and a rear end portion 98 which are longitudinally spaced, as well as an upper edge 99 and a lower edge 100. In or adjacent each end portion 97, 98, elongated main body 95 is provided with spaced holes 101 and 102 respectively. In addition, depending from rear end portion 98 of elongated main body 95 is a locator tab 108 which includes a locator extension 110 having a terminal end 115. As shown, locator extension 110 extends below and generally parallel to elongated main body 95.

0014Also depending from elongated main body 95 at spaced longitudinal positions are first and second support tabs or hangers 120 and 121. Each of first and second support tabs 120, 121 is generally established by a connection section 130 securing the support tab 120, 121 along lower edge 100 of main body 95, a main section 132, and a cantilevered projection or finger section 134. As clearly illustrated in <figref idref="f0003">Figure 3</figref>, between connection section 130 and finger section 134, main body 95 extends for a certain distance spaced from main body 95 such that a slit or recess140 is established, with slit 140 opening toward finger section 134 and terminating at connection section 130. From slit 140, main body 95 leads to finger section 134 through a tapered or ramped section 144. For reasons which will become more fully evident below, both finger section 134 and slit 140 are sized based on the thickness of the material of housing 72 of ventilation hood 70. Finally, provided within main section 132 is a hole 148. Again, second support tab 121 is similarly constructed to first support tab 120 such that a reiterative description will not be made here. However, it should be noted that, although the various longitudinal dimensions of the various sections of the support tabs 120 and 121 can vary (for instance the main section of support tab 121 is shown to be shorter than the main section of support tab 120), the embodiment depicted illustrates the respective finger sections 134 and slits 140 to have substantially corresponding dimensions.

0015In the embodiment shown, support bracket 94 is made of sheet metal which is stamped to create each of main body 95, locator tab 108 and first and second support tabs 120 and 121. In addition, although other materials could be employed, housing 72 of ventilation hood 70 is also formed of sheet metal and, as best shown in <figref idref="f0002">Figure 2</figref>, includes a top panel 153, a sloping section 155 and a front panel 157 created by bending and shaping a piece of sheet metal. For use in mounting ventilation hood 70, top panel 153 is formed with a pair of spaced, front slots 160 and 161, as well as a pair of spaced, rear slots 162 and 163. As will be detailed more fully below, each pair or set of front and rear slots 160 and 162, 161 and 163 on each side of top panel 153 partially receives a respective support tab 120, 121 for mounting of ventilation hood 70.

0016In connection with the invention, it is recognized that the outer lateral dimension of lower support frame 82 is standard based on the distance between wall cabinets 22 and 23. Obviously, ventilation hood 70 is dimensioned and manufactured accordingly. However, based on electrical or other issues, the depth of cabinet 25 may not be the same as cabinets 22 and 23. Still, given that the positioning of slots 160-163 are pre-established upon manufacturing of ventilation hood 70, uniformity in the positioning of support brackets 120 and 121 from rear wall 20 is crucial in addressing mounting alignment issues. With this information in mind, the first step in connection with the mounting method for ventilation hood 70 is to mount first and second support brackets 94 to lower support frame 82 and at predetermined positions relative to both rear wall 20 and side flange portions 86 and 87. More specifically, as exemplified by the left side mounting arrangement of these figures, support bracket 94 is mounted to side flange portion 86 by placing main body 95 against side portion 89, aligning lower edge 100 so as to be flush with a bottom of side flange portion 86 and abutting terminal end 115 of locator extension 110 with rear wall 20. Once properly positioned in this matter, mechanical fasteners, such as wood screws (not shown), are inserted into holes 101 and 102 and driven into side flange portion 86. This same process is then performed for side flange portion 87 such that two fore-to-aft extending support brackets 94 are mounted at spaced locations beneath cabinet 25 with finger sections 134 of support tabs 120 and 121 projecting forward or away from rear wall 20.

0017At this stage, ventilation hood 70 can be hung from the spaced support brackets 94 by aligning the respective support tabs 120 and 121 on each side of cabinet 25 with a respective pair of front and rear slot 160 and 162, 161 and 163 on each side of top panel 153, inserting each support tab 120, 121 into a respective slot 160-163 and then shifting ventilation hood 70 rearward. With this rearward shifting, a portion of top panel 153 will be received with a respective slit 140 as shown in <figref idref="f0004">Figure 4</figref>. During this rearward movement, each tapered section 144 ramps and guides the movement, thereby forcing ventilation hood 70 upward during the rearward shifting and assuring that ventilation hood 70 abuts snugly against cabinet 25. At the same time, a portion of each locator tab 108 is also accommodated in a respective rear slot 162, 163 as slots 162 and 163 open out the back panel (not separately labeled) of ventilation hood 70. Thereafter, each support tab 120, 121 is bent upward against top panel 153 along a respective connection section 130 to assume the position shown in <figref idref="f0005">Figure 5</figref>. At this point, aside from any potential electrical issues, the assembly can be considered complete, with ventilation hood 70 being in an operational position. However, it is also proposed in accordance with the invention to provide a further securing feature by enabling one or more mechanical fasteners, such as metal screws (not shown), to extend through hole(s) 148 and into top panel 153.

0018In the embodiment described above, cabinet 25 is provided with lower support frame 82. However, another standard type of cabinet is frameless such that the lowermost exposed portion would correspond to bottom panel 79. To accommodate use of the invention with this type of known cabinet, each support bracket 94 would include support tabs 120' and 121' (see <figref idref="f0003">Figure 3</figref>) which are connected to main body 95 along edge 99 at right angles, i.e. perpendicular, to both support tabs 120 and 121 and main body 95. As support tabs 120' and 121' are identically configured to support tabs 120 and 121, the structure thereof will not be repeated. However, for use with this type of cabinet, it should be recognized that support bracket 94 is rotated so that main body 95 is flat against bottom panel 79, support brackets 120 and 121 are arranged flush with outermost portions of the cabinet so as to act as spacers which position main body 95 a requisite distance from an outermost lateral edge of cabinet 25 (i.e., a distance equal to the standard thickness of side flange portion 86 or 87), terminal end 115 again abuts rear wall 20 at a height commensurate with main body 95 and ventilation hood 70 is then hung from support tabs 120' and 121' in a manner directly corresponding to that set forth above. Certainly, support tabs 120' and 121' are not needed if mounting ventilation hood 70 to cabinet 25 with lower support frame 82 and the function of support tabs 120 and 121 when utilizing support bracket 94 with a frameless cabinet could be performed by structure lacking at least finger section 134, slit 140, tapered section 140 and hole 148. In addition, even with cabinets lacking lower support frame 82, an outline of the frame to which lower panel 79 is attached can typically be seen so a visual alignment of main body 95 is possible. In any case, when support brackets 94 are structured in the manner illustrated in the figures, it should be apparent that a universal bracket is established in accordance with the invention to enable the mounting of ventilation hood 70 with either type of known cabinetry.

0019Although described with respect to preferred embodiments of the invention, it should be readily apparent that various changes and/or modifications can be made to the invention. For instance, it should be readily apparent that the invention can employ various different fastener assemblies in connection with an overall system and method for mounting a ventilation hood to an underside of a cabinet, including frame-type and frameless cabinets. In addition, although the embodiments described above reference two support tabs on each bracket, it should be recognized that a single, elongate support tab establishing an elongated slit or recess, or more than two support tabs on each bracket, could be employed. In any case, it should be recognized that each configuration provides for the use of support brackets employing distinct aligning (vertically and/or laterally), positioning (fore-to-aft relative to a rear wall) and hanging features which enables a ventilation hood to be mounted in an easy and efficient manner by a single person, without the need for measuring, cutting and installing filler strips as common in the art.