Patent Grant
10835097
The present invention relates to a washing machine, a fluid flow structure (such as a removable wash tank insert and/or a fluid-flow plate/guide structure) of a washing machine and methods of use of a fluid flow structure for a continuous motion washing machine (such as those used to wash items such as pots and pans and other ware, produce, etc.).
Continuous motion washing machines, such as pot and pan washing machines of the type used in restaurants, institutions and other eating facilities, often involve a large wash tank or basin in which fluid is circulated to provide a rolling wash action for the pots, pans or other items being washed. One such machine is described in U.S. Pat. No. 4,773,436 issued to Cantrell et al., the specification of which is incorporated herein by reference. The machine of Cantrell includes a wash tank with multiple jets evenly spaced apart at an elevated position along the rear wall of the wash tank. The tank is filled with water (or other suitable wash fluid) to a level above the position of the jets. Pots and pans are placed in the wash tank, and a pump is activated to draw fluid from within the wash tank and direct it through the jets to create a jet stream. Each jet directs its jet stream toward the bottom wall of the wash tank, the bottom wall then deflects the jet stream upward and towards the front wall of the tank. The front wall then deflects the upward moving jet stream towards the rear wall of the tank, and the rear wall deflects the jet stream downward and back towards the front wall along the bottom wall. The combination of deflections of the jet stream from the bottom, front and rear walls provides a rolling washing action within the wash tank.
The basic components of the wash tank of the pot and pan washing machine of the prior art are shown in
Although the prior art pot and pan washing machine disclosed in U.S. Pat. No. 4,773,436 provides an exceptional wash action, many of the components discussed above hinder the overall efficiency and performance of the machine. The inventions disclosed in U.S. application Ser. Nos. 09/947,484; 09/947,485; and Ser. No. 10/744,666, the entire disclosures of which are incorporated herein by reference, provide components that greatly increase the overall efficiency and performance of the machine, including improvements to the intake and discharge manifolds, jets, pump and system assembly methods. Nevertheless, it is often difficult to maintain suitable lifting action within the front portion of the wash tank to maintain the washing action, particularly when large, generally flat items are located toward the bottom front of the generally rectangular wash tank. Such items will tend to “stick” toward the bottom of the tank by the initial downward jet stream. The downward force from the jet stream can create a pinning action of certain types of items and these items will not roll and rotate with the wash action, resulting in these items remaining substantially soiled. In addition, as items roll and rotate within the wash tank, they often impact (with considerable force) the generally rigid steel walls of the wash tank. Such impacts result in significant noise during a wash cycle and also create unsightly and potentially harmful dents in the walls of the wash tank. In particular, dents in the bottom wall of the wash tank tend to pool water when the wash tank is drained, creating potentially unsanitary conditions. While prior art systems have been developed in which the bottom wall of the wash tank is curved (or barrel-shaped) to reduce or prevent such pinning, construction of wash tanks with such shapes is much more time consuming and expensive than construction of a generally rectangular wash tank. Moreover, it is often preferred to utilize a generally rectangular wash tank for maximizing the usable washing area within the wash tank, particularly for larger, longer items such as sheet pans. Furthermore, the generally rigid, metal walls of such curved tanks still experience significant impacts and noise during a wash cycle. Therefore, it would be beneficial to provide a washing machine, or component(s) thereof, that provide a wash action(s) that is suitable for washing a large variety of items of varying sizes, shapes and weights. It would further be beneficial to provide a washing machine, or component(s) thereof, that is cost-efficient to construct and/or that reduces impacts, noise or other vibrations action on the walls of the wash tank.
An object of the instant invention is to provide a washing machine, or component(s) thereof, that provide a wash action(s) that is suitable for washing a large variety of items of varying sizes, shapes and weights. Another object of the instant invention is to provide a washing machine, or component(s) thereof, that is cost-efficient to construct and/or that reduces impacts, noise or other vibrations action on the walls of the wash tank.
The instant invention includes washing machine and/or a fluid flow structure for a washing machine wash tank. The instant inventions provide improvements to or for use with pot and pan or other item washing machines, such as those described in any of U.S. Pat. No. 4,773,436, U.S. application Ser. Nos. 09/947,484, 09/947,485, 10/744,666 and 12/430,724, or International application Ser. No. PCT/US09/59600 (the entire disclosures of which are incorporated herein by reference). It will be appreciated that other washing machine structures, or various combinations of washing machine structures or components thereof may be utilized in connection with the instant invention without departing from the spirit and scope of the instant invention.
The washing machine of, or in association with, the instant invention includes a generally rectangular wash tank including a bottom wall, two side walls and two end walls extending upwardly from said bottom wall. In a preferred embodiment, the side walls are longer than the end walls. The wash tank further includes at least one flow directional opening in at least one of the walls. In a preferred embodiment, the wash tank includes a plurality of flow directional openings positioned along one of the side walls of the wash tank.
A fluid flow structure is located within said wash tank, which includes a fluid flow guide surface, and a support for said guide surface. The guide surface includes at least one region contoured inconsistently from the contour of at least one corresponding wall of the washing machine wash tank. In a preferred embodiment, the contour of the guide surface is generally curved. The contour of the guide surface aids in reducing and/or preventing the pinning of items that often occurs in rectangular wash tanks of the prior art. The support for the guide surface creates a gap between said guide surface and at least one wall of the washing machine wash tank. The fluid flow guide surface defines a washing area within the wash tank that is located generally opposite of the gap with respect to said fluid flow guide surface. The guide surface, support and/or associated gap at least partially isolates impacts, noise or other vibrations acting on the guide surface from acting on the walls of the washing machine wash tank.
In a preferred embodiment, the fluid flow guide surface is capable of alternatively being inserted into and removed entirely from the washing machine wash tank such that a circulating wash action will be created in the washing machine wash tank whether said guide surface is inserted into or removed from the washing machine wash tank. In this manner, the generally rectangular wash tank of the washing machine may be utilized with the fluid flow guide surface removed to wash large-sized items such as sheet pans. In one such embodiment, sheet pans, or other items are placed in a rack within the wash tank, such that the items being washed will have fluid circulating around them, but will not also roll within the wash action created within the wash tank. This provides a preferred cleaning action due to the difficulty in rolling larger items. When smaller items, such as pots, pans, produce, etc., are to be washed, the fluid flow guide surface is reinserted into the wash tank.
In other preferred embodiments, the support is also removable from the wash tank. In some embodiments the flow guide surface and/or the support are capable of removal without the use of any tools. This allows for quick and easy insertion of the guide surface and/or support depending upon varying washing needs.
In some embodiments of the instant invention, the fluid flow guide surface and/or the support is generally flexible. In a preferred embodiment, the fluid flow guide surface and/or the support is made of a generally flexible, non-metallic material. The flexible fluid flow guide surface and/or the flexible support, provides for flexible motion of the guide surface (and/or support) that is independent of the walls of the wash tank. Thus, the guide surface can flex to absorb impacts or other vibrations before they are imparted upon the generally nonflexible (rigid) walls of the wash tank. This flexible motion, at least partially, isolates impacts, noise or other vibrations from acting on the walls of the wash tank.
In some embodiments, the support comprises a plurality of interconnected ribs that is placed within the wash tank. The ribs are supported by the bottom wall of the wash tank and may additionally be supported by one or more of the side walls of the tank. The ribs are not mechanically affixed to the walls of the wash tank, but is instead support through gravity, friction or some other form of non-attachable connection and which does not require any tools for removal. In preferred embodiments, a plurality of separate sections of interconnected ribs are utilized together in a single wash tank. In a preferred embodiment, each separate section includes a separate fluid flow guide surface that corresponds in length to the length of the section. The plurality of sections may fill the entire wash tank, or just a portion thereof, leaving such portion with the generally rectangular shape of the wash tank. This allows the portion without any section of ribs to be used for washing larger items, such as sheet pans. In a preferred embodiment, the combined length of the sections of ribs within the wash tank are sized to leave one or more voids between adjacent sections. This allows for a divider member to be at least primarily held in place between the two adjacent sections. It will be appreciated that other indexing structures, such as channels or tabs along the walls of the wash tank, may be utilized to further support the divider members, particularly toward the top of the wash tank.
In some embodiments of the instant invention, the fluid flow guide surface includes openings for allowing at least a portion of fluid flow directed from a flow directional opening to pass through the fluid flow guide surface. In some such embodiments, the fluid flow passes from a washing area defined by the fluid flow guide surface into the gap created by the support. In other embodiments, the fluid flow passes through the fluid flow guide surface into the washing area defined by said fluid flow guide surface and opposite the gap.
In one preferred embodiment, at least a portion of said fluid flow guide surface is generally horizontally orientated within the wash tank to create the circulating wash action in the washing machine wash tank about a generally horizontal axis of the wash tank. Such an embodiment is particularly useful for washing machines in which a rolling wash action is intended to be created about the horizontal axis of the wash tank. In an other embodiment, the fluid flow guide surface is generally vertically orientated within the wash tank to create the circulating wash action in the washing machine wash tank about a generally vertical axis of the wash tank. Such an embodiment is particularly useful for washing machines in which the rolling wash action is intended to be created about the vertical axis of the wash tank.
In one embodiment at least a portion of the gap created by the support includes a void that associates with a pumping system intake of the washing machine. The void acts as a manifold to create a flow a fluid generally through the void and into the intake of the machine.
Other embodiments of the invention includes a method of washing items in a continuous motion washing machine, the washing machine including a plurality of flow directional openings each supplying a jet stream of fluid within the washing machine, each jet stream deflecting from at least one wall of or from at least a portion of a removable flow guide structure positioned within the washing machine to provide a washing action, said method comprising the steps of:
isolating a portion of the washing machine by placing at least one member between two of said flow directional openings such that the member divides the washing action within said washing machine;
holding the member within a void created between two adjacent flow guide structures within said washing machine; and
capturing at least a substantial portion of the jet stream from at least one of the plurality of flow directional openings within said isolated portion of the washing machine while at least substantially maintaining the jet stream deflection of the washing machine to provide a washing action within said isolated portion of the washing machine.
In one preferred embodiment of the above method said washing machine is a pot and pan washing machine.
Another embodiment of the invention includes a method of washing items in a continuous motion washing machine, the washing machine including at least one flow directional opening supplying a jet stream of fluid within the washing machine, the jet stream deflecting from at least one wall of or from at least a portion of a removable flow guide structure positioned within the washing machine to provide a washing action, said method comprising the steps of:
locating a fluid flow guide surface within the washing machine, wherein at least one region of the surface is contoured inconsistently from the contour of at least one corresponding wall of the washing machine wash tank; and
introducing the jet stream within a washing area within said wash tank defined by said fluid flow guide surface, said washing area being generally opposite a gap created between said fluid flow guide surface and at least one wall of the washing machine.
In some preferred embodiments this method further comprises the steps of:
locating an item within said washing area; and
orientating an axis of said item generally perpendicular to the jet stream.
The foregoing and other objects are intended to be illustrative of the invention and are not meant in a limiting sense. Many possible embodiments of the invention may be made and will be readily evident upon a study of the following specification and accompanying drawings comprising a part thereof. Various features and subcombinations of invention may be employed without reference to other features and subcombinations. Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings, wherein is set forth by way of illustration and example, an embodiment of this invention and various features thereof.
A preferred embodiment of the invention, illustrative of the best mode in which the applicant has contemplated applying the principles, is set forth in the following description and is shown in the drawings and is particularly and distinctly pointed out and set forth in the appended claims.
As required, a detailed embodiment of the present invention is disclosed herein; however, it is to be understood that the disclosed embodiment is merely exemplary of the principles of the invention, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure.
Referring to
Referring to
As is discussed in more detail below, the fluid-flow plate insert structure(s) shown in
Although the fluid flow guide surfaces and support structures in the embodiments shown and described herein are separable from one another, it will be appreciated that embodiments in which the fluid flow guide surface is integral with the support structure are included within the scope of the instant invention. For example, in one such embodiment, ribs similar to those discussed above with respect to
As is discussed above, the fluid-flow plate 200 of
As shown in
The fluid-flow plate 200 shown in
The fluid-flow plate insert 200 shown in
As is discussed above, the fluid-flow plate 200 includes a curved plate (fluid flow guide surface) 210 that rests on the tops of the two support structures. Each rib in each support structure includes a tab at the high end to receive an edge of the curved plate and maintain its position with respect to the support structure. When viewed from a side, such as shown in
The curved plate includes a plurality of apertures toward the front and rear of the tank, as shown in
The fluid-flow plate 200 as shown in
In a preferred embodiment, the fluid-flow plate 200 shown in
In some embodiments the ribs of the front support structure are design to be able to overlap the ribs of the back support structure when installed in a wash tank. This occurs when the combined width (i.e. front to rear of a wash tank and/or fluid-flow plate) of the front and back support structures is greater than the width of the wash tank. In such embodiments, the ribs of the front support structure must be slightly offset from the ribs of the back support structure to account for the overlap. In use, the larger the width of the tank, the wider the curved plate. The wider curved plate causes the opposing ends of the front and back support structures to be urged further apart from one another thereby accommodating a wider wash tank. In a preferred embodiment the front and back/rear support structures are identical to each other. The only difference is the width of the curved plate that is inserted. The larger the width of the tank, the wider the curved plate. The wider curved plate causes the opposing ends of the front and back support structures to be urged further apart from one another thereby accommodating a wider wash tank.
As is shown in
As is discussed above, the fluid flow plate structure 200 is a modular unit to accommodate different sized wash tanks. In the case of a wash tank with a longer width, front to back, the same support structures may be used by replacing the curved plate with a curved plate of longer length (front to back) as is discussed above. In the case of a wash tank with a longer length, side end to side end, multiple support structures and curved plates are used side by side. In this manner, the fluid-flow plate structure 200 can accommodate a large variety of wash tank sizes and configurations. The fluid-flow plate may be removed entirely from the wash tank and thus is compatible with other pot and pan washing systems.
In the embodiment shown in
Referring to
Referring to
Referring to
As shown in
Also as is shown in
Depending on the force of the fluid under the fluid-flow plate compared to the force of the fluid along the top of the fluid-flow plate, and also depending on whether other items (e.g. pots and pans, produce, etc.) are colliding with the top of the fluid-flow plate, the fluid-flow plate of
In one embodiment, the fluid-flow plate(s), discussed above in connection with any of the embodiments discussed in connection with any of
In one embodiment of the fluid flow plate of
In an embodiment similar to that of
In another embodiment similar to those discussed above with respect to
In another embodiment similar to that of
In one embodiment discussed above, the bottom wall of the tank insert becomes generally flush with the bottom wall of the wash tank and extends to the rear wall of the wash tank. Nevertheless, it will be appreciated that a gap may be created between the bottom wall of the wash tank and the bottom wall of the insert to increase noise reduction from pot, pan or other items striking that area. In some embodiments, a gap is provided between the fluid flow plate and the bottom wall of the insert. This gap too acts as a hydraulic damper in the same or similar manner to the flow plates of embodiments discussed above. Fluid flows from the jet of the wash tank through the hole in the rear of the flow plate and underneath the flow plate toward the front wall of the wash tank. The fluid follows the radius of the insert upward and urges the front of the flow plate upward as it flows out from under the flow plate. This cause the flow plate to oscillate in the same or similar manner discussed above with respect to other embodiments.
In one embodiment in which a separate utensil flow plate for a utensil washing area differs from other flow plates within the wash tank, the utensil plate is attached to the rear wall (or rear intake grate) of the wash tank in the same or similar manner to plates discussed above via a c-channel bracket. The utensil plate extends from the rear wall of the wash tank toward the front wall of the wash tank. The utensil plate curves upward toward the front wall of the wash tank to create a radius and segregated area (and gap) similar to that of the wash tank insert discussed above. The front end of the utensil plate includes a lip that hooks into a channel or shelf ridge located in a support bracket for a wash tank partition plate. The front portion of the utensil plate tapers upward from an end of the wash tank toward the interior of the wash tank. This creates a ramp from the end of the wash tank toward the interior of the tank. As fluid flows from the jets across the top of the utensil plate, the ramp urges the fluid toward the interior of the wash tank. This results in utensils and other items that are located in the utensil area (i.e. above the utensil plate and between the end of the wash tank and the partition plate) to be urged upward toward the front of the wash tank and against the partition plate, such that the items may easily be retrieved from the wash tank by an operator.
In another embodiment the divider discussed above is held in position within the wash tank via a pair of support brackets. A first support bracket is located along the front wall of the wash tank. The front bracket includes a lip that wraps around the top of the front wall of the wash tank to hold the bracket in position. A rectangular body extends downward from the lip along the interior of the front wall of the wash tank. The body includes a pair of rails that form a slot in which the divider/partition is retained. The rear bracket includes a body section that also includes rails that form a slot for retaining the rear end of the divider. The rear bracket is attached to the rear wall of the wash tank via interconnecting hooks or tabs.
Although the gap created between the fluid flow guide surface by the supports in all of the embodiments shown in
The location and shape of the fluid-flow plate structure and/or the oscillating or flexing motion of the fluid-flow plate structure of the embodiments discussed above with respect to
In the foregoing description, certain terms have been used for brevity, clearness and understanding; but no unnecessary limitations are to be implied therefrom 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 inventions is by way of example, and the scope of the inventions is not limited to the exact details shown or described.
Although the foregoing detailed description of the present invention has been described by reference to an exemplary embodiment, and the best mode contemplated for carrying out the present invention has been shown and described, it will be understood that certain changes, modification or variations may be made in embodying the above invention, and in the construction thereof, other than those specifically set forth herein, may be achieved by those skilled in the art without departing from the spirit and scope of the invention, and that such changes, modification or variations are to be considered as being within the overall scope of the present invention. Therefore, it is contemplated to cover the present invention and any and all changes, modifications, variations, or equivalents that fall with in the true spirit and scope of the underlying principles disclosed and claimed herein. Consequently, the scope of the present invention is intended to be limited only by the attached claims, all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Having now described the features, discoveries and principles of the invention, the manner in which the invention is constructed and used, the characteristics of the construction, and advantageous, new and useful results obtained; the new and useful structures, devices, elements, arrangements, parts and combinations, are set forth in the appended claims.
It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.
This application is a divisional application of U.S. patent application Ser. No. 12/765,838, filed Apr. 22, 2010, now U.S. Pat. No. 10,028,636, which claims priority pursuant to 35 U.S.C. 119(e) to U.S. Provisional Patent Application Ser. Nos. 61/171,752 filed Apr. 22, 2009, 61/177,105 filed May 11, 2009, 61/227,686 filed Jul. 22, 2009, 61/231,987 filed Aug. 6, 2009, 61/233,811 filed Aug. 13, 2009, 61/236,801 filed Aug. 25, 2009, 61/255,083 filed Oct. 26, 2009, and 61/266,430 filed Dec. 3, 2009, the entire disclosures of which are incorporated herein by reference.
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| Number | Date | Country | |
|---|---|---|---|
| 20180325347 A1 | Nov 2018 | US |
| Number | Date | Country | |
|---|---|---|---|
| 61171752 | Apr 2009 | US | |
| 61177105 | May 2009 | US | |
| 61227686 | Jul 2009 | US | |
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| Number | Date | Country | |
|---|---|---|---|
| Parent | 12765838 | Apr 2010 | US |
| Child | 16042824 | US |
