1. Field of the Invention
Embodiments of the present invention relate to dishwasher appliances and, more particularly, to a rack handle member for a dishwasher appliance.
2. Description of Related Art
An automated dishwasher typically includes a lower rack and an upper rack, both of which slide in and out of the tub of the dishwasher to facilitate loading and unloading of dishes and utensils. In some such dishwashers, some type of handle or grasping region is provided on the front wall of each rack to allow the user to grasp and pull the rack out. Molded thermoplastic handles, for example, have been used for this purpose.
In some dishwashers, the upper rack supports a mid-level spray arm that moves with the upper rack when it is slid in and out of the dishwasher. The spray arm is supplied with water by a delivery tube that extends horizontally adjacent the lower surface of the upper rack. In some cases, the delivery tube is not permanently connected with the main supply conduit (which typically extends vertically adjacent the rear wall of the tub), but instead there is a check valve assembly associated with the main supply conduit, and the spray arm delivery tube is inserted into the check valve assembly when the upper rack is slid into its proper position for washing, thereby making a connection with the main supply conduit so that water will be supplied to the spray arm. In such dishwashers, it is important for the upper rack to be placed in the correct position, or else a proper connection may not be made. Some users of such dishwashers may not slide the upper rack all the way into the correct position, but may actually use the door of the dishwasher to push the upper rack in. In such circumstances, there is a risk that the mid-level spray arm may not function as intended.
Thus, there exists a need for an apparatus for a dishwasher appliance for ensuring rack members thereof are appropriately positioned within the tub portion when closed for operation of the dishwasher appliance.
The above and other needs are met by the present invention which, according to one aspect, provides a dishwasher comprising a tub portion having a bottom wall, a rear wall, a pair of spaced side walls, a top wall, and a front wall, the front wall being formed at least in part by a door member pivotable between an open position and a closed position. A lower rack is located proximate the bottom wall of the tub and is slidable into and out of the tub portion when the door member is in the open position, and an upper rack is spaced vertically above the lower rack and is slidable into and out of the tub portion when the door member is in the open position. At least the upper rack includes an upper handle formed separately from the upper rack, the upper handle being secured to the front wall of the upper rack and being positioned to be grasped and pulled for sliding the rack out of the dishwasher. The upper handle is configured such that moving the door member to the closed position causes the door member to contact and urge the upper handle inwardly so as to ensure that the upper rack is slid inwardly to a desired predetermined position with respect to the rear wall of the tub.
In another embodiment, a dishwasher comprises a tub portion having a bottom wall, a rear wall, a pair of spaced side walls, a top wall, and a front wall, the front wall being formed at least in part by a door member pivotable between an open position and a closed position. A lower rack is located proximate the bottom wall of the tub and is slidable into and out of the tub portion when the door member is in the open position, and an upper rack is spaced vertically above the lower rack and is slidable into and out of the tub portion when the door member is in the open position. A lower handle is formed separately from the lower rack. The lower handle is releasably secured to the front wall of the lower rack and positioned to be grasped and pulled for sliding the lower rack out of the tub portion, wherein the front wall of the lower rack has an upper edge. The lower handle projects vertically higher than the upper edge of the front wall.
According to another aspect, a dishwasher comprises a tub portion having a bottom wall, a rear wall, a pair of spaced side walls, a top wall, and a front wall, the front wall being formed at least in part by a door member pivotable between an open position and a closed position. A lower rack is located proximate the bottom wall of the tub portion and slidable into and out of the tub portion when the door is in the open position. An upper rack is spaced vertically above the lower rack and slidable into and out of the tub portion when the door is in the open position. Each rack has a bottom wall, a front wall extending generally vertically upwardly from a front edge of the bottom wall, a rear wall extending generally vertically upwardly from a rear edge of the bottom wall, and a pair of spaced side walls extending generally vertically upwardly from opposite side edges of the bottom wall. At least one handle member is formed separately from the lower and upper racks and releasably secured to the front wall of at least one of the upper and lower rack such that the at least one handle member is positioned to be grasped and pulled for sliding the corresponding rack out of the tub portion, wherein each handle member comprises a molded thermoset polymer structure having at least a portion of which is plated with a powdered metal coating.
According to yet another aspect, a handle member is adapted for a rack of a dishwasher, the rack being configured to maintain dishware therein. The dishwasher includes a tub portion defining an interior thereof, and the dishwasher further includes a door member pivotably engaged to the tub portion for providing closed and open positions to facilitate access to the interior thereof. The handle member is formed separately from the rack. The handle member is adapted to be secured to the front wall of the upper rack and positioned so as to be grasped and pulled for sliding the rack out of the tub portion. The handle member comprises a first handle portion and a second handle portion configured to engage the first handle portion and adapted to capture a part of a rack therebetween in order to secure the handle member to the rack. The handle portions comprise a molded thermoset polymer material, and at least one of the handle portions has a plating of a powdered metal coating. The handle member is adapted such that moving the door member to the closed position causes the door member to contact and urge the handle member inwardly so as to ensure that the rack is slid inwardly to a desired predetermined position with respect to the rear wall of the tub portion.
Having thus described the disclosure in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:
The present invention now will be described more fully hereinafter with reference to the accompanying drawings in which some but not all embodiments of the inventions are shown. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.
In some instances, the upper rack may be adjustable to different vertical positions. This allows the user to lower the rack when inordinately tall items are to be placed in the upper rack, or to raise the rack when more vertical space is needed for items in the lower rack. In the illustrated embodiment, for example, the upper rack has three different positions that can be selected.
The spray arms typically include an uppermost spray arm (not shown) mounted to an underside of an upper wall of the tub 12 for spraying water generally downwardly, and a lowermost spray arm 18 mounted on an upper side of a bottom wall of the tub for spraying water generally upwardly. The spray arms also include a mid-level spray arm 20 that is attached to an underside of the upper rack and is configured for spraying water both upwardly and downwardly. The spray arm 20 is supplied with water via a delivery tube 22 that extends generally horizontally along the underside of the upper rack. As will be appreciated by those of skill in the art, when the upper rack is adjusted to different vertical positions, the delivery tube 22 moves with the upper rack and thus also assumes different vertical positions.
The water delivery system for the spray arm 20 may include a main supply conduit 24 that connects to the pump 15 at the lower end of the conduit, extends generally vertically upwardly adjacent a rear wall of the tub 12, and then turns to extend generally horizontally along the underside of the upper wall of the tub for supplying water to the uppermost spray arm. Along the generally vertical portion of the main supply conduit may be a check valve assembly 30 that cooperates with the delivery tube 22 to supply water to the mid-level spray arm 20. In such instances, the check valve assembly 30 allows the delivery tube 22 to be fluidly coupled with the main supply conduit 24 when the upper rack is slid all the way into the interior of the tub 12, and to be disconnected from the main supply conduit when the upper rack is slid out for loading or unloading dishes and utensils. As further described below, in some instances, it may be desirable for the upper rack to be slid into the tub and into the correct position with respect to the rear wall of the tub in order for the proper connection to be made between the delivery tube 22 and the supply conduit 24.
As noted, and with reference to
Similarly, the upper rack 60 may have a bottom wall 62, a front wall 64 extending generally vertically upwardly from a front edge of the bottom wall, a rear wall (not shown) extending generally vertically upwardly from a rear edge of the bottom wall, and a pair of spaced side walls 68 (only one visible in
In some embodiments, the front wall 44, 64 of each rack may include at least two generally horizontal wires 44h, 64h, respectively, spaced apart in a vertical direction and a plurality of generally vertical wires 44v, 64v, respectively, spaced apart horizontally and secured to the at least two generally horizontal wires.
The dishwasher may include a lower handle 50 secured to the front wall 44 of the lower rack 40, as shown in
The lower handle 50 may be configured and arranged with respect to the front wall 44 of the lower rack such that the grasping portion 52 of the handle is spaced above the upper edge of the front wall (which is defined by the uppermost horizontal wire 44h) a sufficient distance so that a user's fingers can extend between the grasping portion 52 and the upper edge of the front wall. In this manner, the lower handle 50 is more easily accessible to the user and reduces the amount by which the user must bend down in order to grasp the grasping portion 52 to pull the lower rack 40 out from the dishwasher tub.
In accordance with one aspect of the invention, the handle portions 50a, 50b may be molded from a thermoset polymer material. Any of various thermoset polymer materials known in the art can be used, including but not limited to melamine resins, polyurethane resins, epoxy resins, unsaturated polyester resins, and the like.
In accordance with another aspect of the invention, at least the outwardly facing (convex) surface of at least the front handle portion 50a may be plated with a powdered metal coating or any other suitable coating. The powdered metal coating may comprise, for example, a stainless steel powder, such as 304SS. In some instances, the coating may provide a mirror finish. Stainless steel is highly resistant to rust and avoids the use of any heavy metals (e.g., chromium, nickel, or the like, which are typical materials for achieving bright mirror finishes) that potentially could leach out and contaminate the dishes and utensils being washed.
With reference to
The upper handle 70 may be configured and arranged with respect to the front wall 64 of the upper rack such that the grasping portion 72 of the handle is at approximately the same level as the upper edge of the front wall (which is defined by the uppermost horizontal wire 64h). There may be a sufficient distance between the grasping portion 72 and the next-to-uppermost horizontal wire 64h such that a user's fingers may extend between the grasping portion 72 and that wire.
In accordance with one aspect of the invention, the handle portions 70a, 70b may be molded from a thermoset polymer material. Any of various thermoset polymer materials known in the art can be used, including but not limited to melamine resins, polyurethane resins, epoxy resins, unsaturated polyester resins, and the like.
In accordance with another aspect of the invention, at least the outwardly facing (convex) surface of at least the front handle portion 70a may be plated with a powdered metal coating or any other suitable coating. In some embodiments, the powdered metal coating may comprise, for example, a stainless steel powder, such as 304SS.
A further aspect of the invention relates to the proper functioning of the check valve assembly 30 (
It will be recognized that the handles 50, 70 described herein may be used in virtually all types of dishwashers that have racks that slide in and out, and are not limited to being used on dishwashers having the particular type of mid-level spray arm and water delivery system as described herein.
Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. For example, both handle portions of a given handle may be plated with powdered stainless steel if desired. The handles may have shapes different from those illustrated and described herein, and/or the handles may be attached to the racks in ways different from those described herein. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
This application claims the benefit of the filing date of U.S. Provisional Patent Application Ser. No. 60/916,156 filed May 4, 2007, the entire disclosure of which is hereby incorporated herein by reference.
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