Not Applicable.
The present invention relates generally to a leveling leg for an appliance, and more particularly, to a leveling leg for an appliance having a rollerball.
Household and commercial appliances, for example stoves, ranges, dishwashers, refrigerators, clothes washers and dryers, and other appliances, are often installed into their surrounding environment. Some common measures of the installation of an appliance are the degree to which the appliance is level, the height of the appliance, and the ease of moving the appliance, for example during installation, maintenance, or cleaning.
The performance of many appliances can be affected if they are not level during operation. For example, an oven that is not level will often bake cakes that are also not level. The height of an appliance is also a factor during installation. For example, it may be advantageous to adjust the height of an appliance to match its surrounding cabinetry or countertop. Further, appliances are often heavy and awkwardly shaped. For example, it may be difficult to maneuver appliances during installation, especially into limited or confined spaces, and/or it may also be necessary to move appliances to allow maintenance and cleaning of the appliances themselves and the areas around the appliances.
The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the invention. It is intended to identify neither key nor critical elements of the invention nor delineate the scope of the invention. Its sole purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented later.
In accordance with an aspect of the present invention, A leveling leg for an appliance is provided. The leveling leg includes: a main shaft; a foot coupled to the main shaft; a recess extending at least partially into the foot and including an opening through a bottom surface of the foot; and a ball adapted to be received within the recess, wherein the opening substantially surrounds at least a portion of the ball and is configured to inhibit removal of the ball from the recess
In accordance with another aspect of the present invention, a leveling leg is provided. The leveling leg includes: a main shaft; a foot coupled to the main shaft; a recess extending at least partially into the foot and including an opening through a bottom surface of the foot; a plurality of arms at least partially disposed within the recess; and a ball adapted to be received within the recess, the plurality of arms cooperating at one end thereof to engage the ball at an area below a great circle of the ball to inhibit removal of the ball from the recess.
In accordance with another aspect of the present invention, an appliance is adapted to rest upon a supporting surface. The appliance includes: a bottom surface; and a leveling leg coupled to the bottom surface and adapted to project a distance therefrom to support the appliance upon the supporting surface, including: a main shaft; a foot coupled to the main shaft and including a bottom surface; a recess extending at least partially into the foot and including an opening through the bottom surface; at least one arm at least partially disposed within the recess; and a ball adapted to be received within the recess by a snap-fit engagement with the at least one arm, the at least one arm reducing a size of the opening to be less than a maximum width of the ball to inhibit removal of the ball from the recess, the ball projecting a distance outward from the bottom surface of the foot when the ball is received within the recess.
The foregoing and other features and advantages of the present invention will become apparent to those skilled in the art to which the present invention relates upon reading the following description with reference to the accompanying drawings, in which:
An example embodiment of a device that incorporates aspects of the present invention is shown in the drawings. It is to be understood that the shown example is not intended to be a limitation on the present invention. For example, one or more aspects can be utilized in other embodiments and even other types of devices.
Turning initially to
Optionally, one or more of the leveling legs 10 can be anchored to the supporting surface 22, such as by an anti-tip bracket 16 or the like, so as to inhibit or prevent the appliance 20 from tipping. The anti-tip bracket 16 can be fastened or anchored to either or both of the floor 22 or wall 24 (e.g., directly to the wall, to a toe board, or the like) in various manners such that the leveling leg 10 is constrained against movement when it is received therein. In one example, as shown, the anti-tip bracket 16 can include one or more holes (not shown) or the like adapted to receive fasteners 28 that are coupled to the support surface. In other examples, the anti-tip bracket 16 can be removably or non-removably anchored to a support surface by way of adhesives, welding, a snap connection, an interference fit, and/or it can even be formed with the support surface. The anti-tip bracket 16 is illustrated merely by way of example, and can be modified and adapted accordingly for use with various appliances, and/or various support surfaces. In addition or alternatively, the leveling leg 10 can also be adapted for use with an interlock switch assembly (not shown) or the like that can selectively permit or inhibit, such as prevent, operation of the appliance 20 under various conditions, such as where an anti-tip bracket is not installed, the range is not level, a leveling leg is not installed, etc.
Turning to
The leveling leg 10 can include structure to facilitate vertical adjustment thereof. In one example, the leveling leg 10 can include a hex-head 36 or the like for engagement with a wrench, socket, or the like for rotating the leg 10. In addition or alternatively, the leveling leg 10 can include one or more recesses 37, such as on a portion of the foot 32, for engagement with a tool (e.g., a screwdriver or wrench, etc.) to provide some mechanical advantage for rotating the leg 10, such as when the hex-head 36 is difficult or impossible to use. In addition or alternatively, the recesses 37 can be at least partially formed or defined by one or more strengthening webs 39 or the like that can provide strength to the leveling leg 10, while permitting a reduction in material used to form the leg 10. It can be beneficial to choose the minimum height of the leveling legs 10 to allow a tool or the like to fit underneath the appliance 20 to facilitate easy and rapid adjustment of the height of leveling leg 10. In addition or alternatively, the leveling leg 10 can include structure to avoid over-tightening of the leg 10, such as a thread stop 62 or the like adapted to engage structure of the appliance to inhibit, such as prevent, further rotation of the leveling leg 10.
As shown in
Turning now to
The leveling leg 10 can further include a ball 44 (which may be referred to herein as a “rollerball”) adapted to be received within the recess 40. The ball 44 may be a sphere, as shown in the Figures, though may also be a polyhedron or the like. As shown in
The opening 42 can substantially surround at least a portion of the ball 44. For example, the opening 42 can substantially surround the portion of the ball 44 that passes through the opening 42 and out of the foot 32, though other portions are also contemplated. The opening 42 can also be configured to inhibit, such as prevent, removal of the ball 44 from the recess. In one example, the ball 44 can be retained within the recess 40 by a snap-fit engagement, such as a snap-fit engagement between the ball 44 and the opening 42. For example, the opening 42 can be formed of a generally resilient material, such as plastic or the like, while the ball 44 can be formed of a relatively harder material, such as a relatively harder plastic, hard rubber, metal, etc., such that insertion of the ball 44 into the recess 40 via the opening 42 can force a portion of the opening 42 to temporarily increase in size while the ball 44 is passing therethrough, whereupon the opening 42 can then return to its original size to thereby inhibit removal of the ball from the recess 40.
In addition or alternatively, the leveling leg 10 can further include at least one arm 46 partially disposed within the recess 40. The at least one arm 46 can define a portion, such as all, of the opening 42. Thus, the at least one arm 46 can substantially surround the ball 44 and can be configured to inhibit removal of the ball 44 from the recess 40. The at least one arm 46 can substantially surround at least a portion of the ball 44. For example, the at least one arm 46 can substantially surround the portion of the ball 44 that passes through the opening 42 defined by the at least one arm 46 and out of the foot 32, though other portions are also contemplated. In another example, the at least one arm 46 can substantially surround the portion of the ball 44 that resides within the recess 40.
As shown in
For example, the ball 44 can be retained within the recess 40 by a snap-fit engagement between the ball 44 and at least one of the arms 46, 47, 48. In one example, at least one of the arms 46, 47, 48 can be formed of a generally resilient material, such as plastic or the like, and can be resiliently coupled to the foot 32. The resiliency of the arms can act to provide a generally self-centering action of the ball 44 within the recess 40. As shown, all of the arms 46, 47, 48 can be formed of a generally resilient material and all can be resiliently coupled to the foot 32. For example, the first end 50 of each arm 46, 47, 48 can be formed with the foot 32 so as to be resiliently coupled thereto. The ball 44 can be formed of a relatively harder material, such as a relatively harder plastic, hard rubber, metal, etc., such that insertion of the ball 44 into the recess 40 via the opening 42 can force at least one of the arms 46, 47, 48 away from another of the arms 46, 47, 48 to temporarily increase the size of the opening 42 while the ball 44 is passing therethrough. For example, the second end 52 of each respective arm 46, 47, 48 can resiliently maintain the opening 42 at a size less than a maximum width of the ball 44. Thus, the opening 42 can define a width equal to or less than the great circle of the ball 44. Generally, a great circle of a sphere is a circle that runs along the surface of that sphere so as to cut it into two substantially equal halves, such that the great circle generally has both the same circumference and the same center as the sphere. For example, the great circle is substantially the largest circle that can be drawn on a given sphere.
Thus, forcing the ball 44 through the opening 42 can cause the second end 52 of at least one of the arms 46, 47, 48 to move away from the second end 52 of another of the arms 46, 47, 48 to thereby increase the size, such as the width, of the opening 42 to be substantially equal to or greater than a maximum width of the ball 44. In one example, one or more of the arms 46, 47, 48 can be moved so as to increase the size of the opening 42 to be equal to or greater than the great circle of the ball 44. After the largest width of the ball 44 has passed therethrough, the opening 42 can then return to its original size (i.e., the second end 52 of the arms 46, 47, 48 can resiliently return to their original positions) to thereby inhibit removal of the ball from the recess 40. In one example, the plurality of arms 46, 47, 48 can cooperate at one end thereof (i.e., the second end 52) to engage the ball 44 at an area below the great circle of the ball 44 to inhibit, such as prevent, removal of the ball from the recess 40.
Although the foregoing examples have been described with reference to a load-bearing leveling leg 10 for the appliance, it is to be understood that the leveling leg 10 can include other variations. Turning back to
Thus, for example, some of the leveling legs 10 can operate as described for moving the appliance 20, though can be generally non-load-bearing so as to support little or no weight of the appliance 20. In another example, where four leveling legs 10 are generally evenly positioned about the four corners of an appliance, a front two of the leveling legs 10 can be conventional legs without a ball 44, while a rear two of the leveling legs 10 can be of the design here that include a ball 44. Thus, to move the appliance 20, the user may raise the front of the appliance 20 to thereby lift the front two leveling legs 10 off of the supporting surface 22, while using the balls 44 of the rear two leveling legs 10 to reposition the appliance 20. It is to be understood that leveling legs 10 of the present application can be utilized without a ball 44 installed within the recess 37 thereof in place of a conventional leveling leg. It is also be understood that any or all of the legs used to support the appliance 20 may or may not include level adjusting structure, such as the threaded outer surface 34 or the like.
In addition or alternatively, the leveling legs 10 can further include additional structure and/or features. In one example, it can be beneficial to increase, such as maximize, a size of the ball 44 to thereby decrease, such as minimize, a pressure point contact of the ball 44 with the supporting surface 22. Such a feature may inhibit, such as prevent, damage to the supporting surface 22 and/or reduce, such as minimize, a force required to move the appliance 20 upon the supporting surface 22. Similarly, the size of the recess 40 and/or opening 42 can be correspondingly increased. Thus, the geometry and/or various features of the leveling leg 10 may change to accommodate various sizes of the recess 40 and/or ball 44. Though not shown, each leveling leg 10 can include a plurality of recesses each containing one or more balls, which may also effectively reduce a pressure point contact with the supporting surface 22. In another example, it can be beneficial to decrease, such as minimize, the surface area contact between the ball 44 and the recess 40 and/or opening 42 to thereby decrease, such a minimize, frictional forces therebetween. For example, a relatively smooth surface material can be chosen for the ball 44, such as a chrome-plated metal or the like. Similarly, a corresponding material can be chosen for the recess 40, opening 42, arms 46, 47, 48, etc.
In addition or alternatively, the recess 40, opening 42, and/or arms 46, 47, 48 can include structure to reduce surface area contact and/or frictional forces with the ball 44. In one example, at least one of the plurality of arms 46, 47, 48 can include a curved aperture 54 on an interior surface 56 thereof (see
In addition or alternatively, each of the arms 46, 47, 48 can include other structure and/or geometry to reduce, such as minimize, surface area contact with the ball 44. In one example, the second end 52 of at least one of the arms 46, 47, 48 can be provided with a geometry that reduces surface area contact with the ball 44. For example, the second end 52 of each of the plurality of arms 46, 47, 48 can cooperate to define the opening 42 as a polygon, such as a hexagon or other polygon. Similarly, the edge of some or all of the second ends 52 can have a curved geometry, such as an outwardly curved geometry, to further reduce surface area contact with the ball 44, and/or to facilitate ingress or egress of the ball 44 in or out of the recess 40. It is to be understood that the plurality of arms can include various other numbers of arms and can cooperate to define the opening 42 as various other shapes and geometries.
In addition or alternatively, various features can be provided to facilitate removal of the ball 44 from the recess 40. For example, a user may desire the remove the ball 44 from the recess 40 for maintenance, replacement, to inhibit a portion of the appliance 20 from moving, etc. In one example, a gap can be provided between an arm and the recess 40, or between one or more of the arms 46, 47, 48, to enable a user to insert a tool, such as a screwdriver or the like, for dislodging the ball 44 from the recess 40. The ball 44 can be directly or indirectly dislodged from the recess 40, such as by directly prying the ball 44 therefrom (e.g., such as by inserting the tool in a gap between two or more of the arms 46, 47, 48), or by utilizing the tool to temporarily increase the width of the opening 42 (e.g., such as by moving one or more of the arms 46, 47, 48 away from each other, etc.). In addition or alternatively, one or more apertures can be provided variously about and/or through various portions of the leveling leg 10 like to permit a tool to be inserted therethrough for dislodging the ball 44 out of the recess 40, such as by applying a force greater than that of the arm(s) 46, 47, 48 retaining the ball 44. In one example (see
It is also to be understood that the leveling legs of the subject invention can be used in settings other than in a range. For example, the leveling legs of the subject invention could be used in a refrigerator, freezer unit, icemaker, dishwasher, washing machine, dryer, or the like. Even further still, the leveling legs can be utilized in various other applications, such as furniture, power tools, shelving, computer equipment, exercise equipment, equipment supports, commercial or industrial equipment, and/or various other applications that may be subject to adjustable heights and/or level operation.
Additionally, the size and/or geometry of the leveling legs of the subject invention can also depend upon the type of appliance and/or the type of support surface it is intended to be used with. In the example embodiments, the leveling legs are sized to replace a conventional leveling leg of a conventional oven. However, the various elements of the leveling legs can be made larger to fit commercial appliances (e.g., commercial ovens, refrigerators, freezer units, icemakers, dishwashers, washers, dryers, or the like), or sized to fit various other applications in which the leveling leg is to be used. In such a case, the size and/or geometry of the leveling legs can be adapted accordingly. Further, it is to be understood that the various elements of the leveling legs can be made of suitable materials, such as metal, plastic, hard rubber, and the like. Further still, the various elements need not be constructed from the same materials.
The invention has been described with reference to the example embodiments described above. Modifications and alterations will occur to others upon a reading and understanding of this specification. Examples embodiments incorporating one or more aspects of the invention are intended to include all such modifications and alterations insofar as they come within the scope of the appended claims.
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Number | Date | Country | |
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20110050064 A1 | Mar 2011 | US |