The present invention relates generally to pumps. More specifically, the present invention is concerned with parallel flow pumps utilized in commercial washing and other fluid circulating applications.
U.S. Pat. No. 6,739,348, filed Sep. 6, 2001, (the “'348 patent”) provides a pot and pan washing machine with a wash tank and a self-draining parallel flow pump (in which the intake fluid path of the pump is generally parallel to the discharge fluid path of the pump), the entire disclosure of which is hereby incorporated by reference. The '348 patent further provides a self-cleaning intake manifold within the wash tank, flush mounted jet nozzles within the wash tank, and a non-welded field joint for connecting two portions of the washing machine together as a single unit. The pump is located on a side of the wash tank. Fluid enters the pump in a first direction and is discharged in a second direction that is substantially parallel to the first direction.
The parallel flow pump of the '348 patent is depicted both externally and internally in
For example, the parallel flow pump of the prior art includes a multitude of sharp corners inside of the pump, which reduce efficiency and potentially limits the flow of the pump (referred to herein as “flow restrictors”). This results in capped pumping capacity which, in turn, results in a salesman's inability to quote larger versions of the machines. There are two such locations inside the pump as illustrated in
Accordingly, it would be advantageous to provide a parallel flow pump structure(s) to provide such greater efficiency.
Moreover, the ability to rapidly assemble mass-produced machinery has a direct and significant effect on the profitability of a manufacturing operation. The design of the parallel flow pump of the '348 patent, while expertly manufactured and designed, is difficult to attach the pump to the various wash sinks of various product lines. Manually operated, open-end wrenches are required to attach the volutes to the wash sinks resulting in an extremely tedious and time-consuming process. Accordingly, it would be advantageous to provide a pump design which accounts for socket wrench clearances and/or that is subsequently considerably easier to assemble to the associated machine.
The present invention comprises an improved parallel flow pump (in which the intake fluid path of the pump is generally parallel to the discharge fluid path of the pump) that provides increased efficiency and/or easier installation compared to those of the prior art.
Additionally, in the pump of
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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
In the depicted embodiment, the improved parallel flow pump 150 includes a pump housing 155. In some embodiments of the present invention, the pump housing 155 is a generally helical housing. In the depicted embodiment of the improved parallel flow pump 150, the pump housing defines a generally helical housing; however other housing configurations or shapes are contemplate din various other embodiments of the inventive concept.
In some embodiments of the instant invention, the improved parallel flow pump 150 includes an intake chamber 192. In some embodiments, the housing 155 of the improved parallel flow pump 150 defines the intake chamber 192. In some embodiments of the present invention, the intake chamber 192 extends from a pump inlet 152 to a raised volute 194. In some embodiments of the instant invention, the intake chamber 192 extends from a pump inlet 192 to a cylindrical passage 190.
In some embodiments of the instant invention, the improved parallel flow pump 150 includes a raised volute 194. In some embodiments, the housing 155 of the improved parallel flow pump 150 defines the raised volute 194. As shown in
In some embodiments of the instant invention, the improved parallel flow pump includes a cylindrical passage 190. In some embodiments, the housing 155 of the improved parallel flow pump 150 defines the cylindrical passage 190. As shown in
In some embodiments, the improved parallel flow pump 150 is removably attached to a pump motor assembly. In some embodiments of the instant invention, the pump motor assembly protrudes axially from the pump housing 155. In some embodiments, a motor assembly is inserted into the cylindrical passage 190. In some embodiments of the instant invention, the motor assembly includes an impeller and impeller assembly. In some embodiments, the motor assembly is inserted, impeller first, into the cylindrical passage 190. In some embodiments, the impeller extends into the raised volute 194.
In some embodiments of the instant invention, the improved parallel flow pump 150 includes a drainage passage 196. In some embodiments, the housing 155 of the improved parallel flow pump 150 defines the drainage passage 196. In some embodiments, the drain passage extends from the lower portion of the raised volute 194 into intake chamber 192. In some embodiments of the present invention, when the pump motor is not operating, gravitational forces will cause some or all fluid within the raised volute 194 through the drainage passage 196, into the intake chamber 192.
In some embodiments, the improved parallel flow pump 150 includes a pump inlet 152 and a pump outlet 154. In some embodiments of the present invention, a direction of the pump inlet 152 is generally parallel to a direction of the pump outlet 154. In some embodiments, the pump inlet 152 is removably attached to an intake port of a pot and pan washing machine, produce washing machine, and/or other basin. In some embodiments, the pump outlet 154 is removably attached to an outlet manifold of a pot and pan washing machine, produce washing machine, and/or other basin. In some embodiments, the pump inlet 152 or the pump outlet 154 comprises a generally square or rectangle cross-section; however, the pump inlet 152 or pump outlet 154 in other various embodiments comprise a cross-section of virtually any shape.
In operation, the motor assembly rotates the impeller inside the pump housing 155 causing a fluid to flow in a first fluid path. The impeller has an enclosed face which results in a suction for the impeller flowing from the shaft side of the impeller. Fluid is drawn into the pump inlet 152, then into the intake chamber 192 from the shaft side of the impeller. The impeller creates a rotational movement of the fluid within the intake chamber 192. An anti-rotational member directs the rotating fluid withing the intake chamber 192 from the chamber into the raised volute 194. The fluid is thrust into the raised volute 194 through vanes of the rotating impeller. The raised volute 194 then directs the fluid outward where it is discharged into the pump outlet 154.
In some embodiments of the instant invention, the pump housing 155 defines the first fluid path, which extends from the pump inlet 152 to the pump outlet 154. In the embodiment shown, the first fluid path starts in first direction from the intake, rotates generally 180 degrees by a first volute portion along a first plane that is parallel to the intake direction, and then is turned in a direction that is generally perpendicular to the first plane of rotation to move from the first volute portion to a second volute portion. In the second volute portion, the first fluid path is turned generally perpendicularly into a direction that is generally parallel to the first plane of rotation. The first fluid path is rotated through the second volute portion generally 180 degrees about a second plane of rotation that is parallel to the first plane of rotation, and the fluid path ends at the pump discharge. In the depicted embodiment, the improved parallel flow pump 150 defines an improved fluid path. In some embodiments, the improved fluid path comprises a plurality of improved fluid paths. In some embodiments of the instant invention, a fluid is drawn into the pump inlet 152 in a first direction. In another embodiment, fluid is discharged from the pump outlet 154 in a second direction. In some embodiments, the first direction is generally parallel to the second direction. In some embodiments of the instant invention the first fluid path begins when a fluid is drawn into the pump inlet 152, next the fluid enters into and passes through the intake chamber 192, next the fluid enters into and passes through the cylindrical passage 190, next the fluid enters into and passes though the raised volute 194, finally the fluid exits the improved parallel flow pump 150 though the pump outlet 152.
In some embodiments, the pump housing 155 is constructed entirely of a first material. In other embodiments, the pump housing 155 is constructed from a plurality of materials. In some embodiments of the instant invention, the improved parallel flow pump 150 is constructed entirely stainless steel; however, it will be appreciated that other embodiments of the inventive concept are constructed of any suitable material for the application.
Referring again to
The interaction with objects, such as restrictors or objects, placed within, or in contact with, a fluid path often influences the efficiency of a pump and, thus, limiting the pumping capacity of a parallel flow pump. In a preferred embodiment of the present invention, the improved parallel flow pump 150 replaces one or more objects or restrictors with one or more improved flow restrictors 170, such as a flow advancer 170 (the terms improved flow restrictor and flow advancer are used interchangeably herein).
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In some embodiments, the improved flow restrictor 170 includes a plurality of flow restriction reducing surfaces. In some embodiments of the instant invention, the plurality of flow restriction reducing surfaces are machined surfaces. In some embodiments of the present invention, the improved flow restrictor 170 comprises a rounded surface, such that the rounded surface decreases the angle between two outer intersecting surfaces of a restriction. In some embodiments, the improved flow restrictor 170 comprises a rounded surface, such that the rounded surface increases the angle between two inner intersecting surfaces of a restriction. In some embodiments of the instant invention, the improved flow restrictor includes a plurality of surface round edges. In some embodiments, the improved flow restrictor 170 includes a plurality of chamfered edges. In some embodiments of the instant invention, flow restriction reducing surface comprises two or more surfaces that the angel or inclination of the two surfaces meet one another at any angle other than a right angle.
In some embodiments of the instant invention, as shown in
In a preferred embodiment of the instant invention, the improved flow restrictors 170 increase the fluid velocity along a fluid path withing the pump housing 155. In another preferred embodiment of the instant invention, the improved flow restrictors 170 increase the efficiency of the improved parallel flow pump 150.
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The improved parallel flow pump of the instant invention is designed in such a way such that the improved parallel flow pump is capable of being mounted to a surface, such as a wash sink of a pot and pan washing machine. In one embodiment of the instant invention, the improved parallel flow pump includes one or more fastener holes 142 for mounting the pump 150 to the surface. In a preferred embodiment of the present invention, the improved parallel flow pump incorporates a design that comprises an improved clearance 140 for the one or more fastener holes 142. This improved clearance provides additional socket and wrench clearance for one, or all, fastener holes 142 to allow for rapid assembly of the improved parallel flow pump 150 to the surface. Referring 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 claims priority pursuant to 35 U.S.C. 119(e) to co-pending U.S. Provisional Patent Application Ser. No. 63/240,968, filed Sep. 5, 2021, the entire disclosure of which is incorporated herein by reference.
Number | Date | Country | |
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63240968 | Sep 2021 | US |