EP4617497A1

EP4617497A1 - A water pump

Info

Publication number: EP4617497A1
Application number: EP24215928.3A
Authority: EP
Inventors: Rong Lin; Yungang CHEN; Wenwei Ji; Guangjian HE
Original assignee: Husqvarna AB
Current assignee: Husqvarna AB
Priority date: 2024-03-11
Filing date: 2024-11-27
Publication date: 2025-09-17
Also published as: WO2025189320A1

Abstract

A water pump (100) comprises a pump body (200) and a pump base (300) rotationally coupled to the pump body (200). The pump base (300) can be moved away and towards the pump body (200). The pump body (200) and the pump base (300) exhibit cooperating structures that allow the pump base (300) to stably rest in at least two relative positions when rotating the pump body (200) relative to the pump base (300). The water pump (100) is characterized in that either the pump body (200) has at least one positioning rib (222) and the pump base (300) has at least one cooperating positioning column (306) or vice versa; wherein rotation of the pump body (200) relative to the pump base (300) makes the at least one positioning rib (222) either rest on the positioning column (306) or next to the positioning column (306), and thereby allow for a different relative position of the pump body (200) and the pump base (300) respectively.

Description

TECHNICAL FIELD

The present disclosure relates to a water pump having a pump body and a pump base, and more particularly to the water pump having the pump base that can be moved away and towards the pump body.

BACKGROUND

A water pump typically comprises a pump body that defines a water inlet and a water outlet. Further, the water pump includes a motor, and an impeller operated by the motor such that the impeller functions to suck in water via the water inlet. The motor further functions to pressurize water entering via the water inlet such that the pressurized water is delivered for external applications via the water outlet.
The water pump further includes a pump base that supports the water pump on a ground surface. The pump base further includes a grid-like suction aperture to allow ingress of surrounding water into the water inlet of the pump body. However, the surrounding water may be clean or dirty, and while the grid-like suction aperture may be able to allow ingress of clean water into the water inlet, the grid-like suction aperture may not be a perfect solution to allow in the dirty water into the water inlet as the dirty water may contain foreign elements that may clog the grid-like suction aperture over time. Thereby, in order to efficiently use the water pump irrespective of the clean water, or the dirty water, it is desirable to move the pump base towards and away from the pump body when the water to be pumped is clean and dirty respectively, as when the pump base is moved away from the pump body to pump in dirty water, the dirty water gets more space to actually seep into the water inlet of the pump body.
However, the known solutions to move the pump base towards and away from the pump body are expensive, cumbersome, and unergonomic.
An example of a water pump is provided in German Utility Model DE 202,018,106,483 U1 (hereinafter referred to as '483 reference). The '483 reference provides a pump body, a base, and at least one adjustment mechanism. The at least one adjustment mechanism is located in a round interval between the pump body and the base. Each adjustment mechanism consists of a stepped bore installed on an outer wall of the base, elastic disk disposed on the outer wall of the base, a removable adjustment column disposed on an outer wall of the pump body, and a plurality of adjustment grooves vertically formed on the outer wall of the pump body. The upper side of the elastic disk forms a bulge in the adjusting groove to a limited extent on one side of the outer wall of the pump body, and the adjusting column is blocked in the stepped bore.

SUMMARY OF THE INVENTION

In view of the above, it is an objective of the present invention to solve or at least reduce the drawbacks discussed above. The objective is at least partially achieved by a water pump.
According to an aspect of the present invention, the water pump comprises a pump body that defines a water inlet. The water pump further comprises a motor to pressurize water entering via the water inlet. Further, the pump body of the water pump defines a water outlet to deliver water pressurized by the motor. Further, a pump base is rotationally coupled to the pump body, wherein the pump base can be moved away and towards the pump body. The pump body and the pump base exhibit cooperating structures that allow the pump base to stably rest in at least two relative positions when rotating the pump body relative to the pump base. The water pump is characterized in that either the pump body has at least one positioning rib and the pump base has at least one cooperating positioning column or vice versa; wherein rotation of the pump body relative to the pump base makes the at least one positioning rib either rest on the positioning column or next to the positioning column, and thereby allow for a different relative position of the pump body and the pump base respectively.
The present disclosure advantageously provides two stable rest positions for the water pump which correspond to two different operating configurations and may be switched between in a seamless manner by a user. The base of the water pump can be moved easily between two stable configurations which may be used for different application scenarios. Such a structural arrangement makes it easier for a user to switch between different operating configurations. Further, the changeover can be done without the need of any special tools or equipment in a very simple and tool less manner. Such an arrangement facilitates swift, efficient, and ergonomic operation of the water pump for a user.
According to an exemplary embodiment of the invention, either the pump body exhibits a stabilization protrusion, and the pump base exhibits at least two cooperating indents or vice versa, so that after rotating the pump body relative to the pump base the positioning of the pump housing in respect to the pump base is stabilized. The stabilization protrusion and the at least two cooperating indents together advantageously facilitate accurate positioning of the pump base relative to the pump body, when changing between the two stable positions.
According to an exemplary embodiment of the invention, the pump body exhibits a holding protrusion, and the pump base exhibits cooperating stabilization indent that prevents the relative motion of the pump base away from the pump body. The holding protrusion and the cooperating stabilization indent together advantageously ensure that the pump body and the pump base do not get unintentionally disengaged with each other, in particular due to gravitational forces acting on the pump base when the pump is lifted from the ground surface.
According to an exemplary embodiment of the invention, either the pump body exhibits a limiting protrusion, and the pump base exhibits a cooperating elongated limiting hole or vice versa, that limits the rotation of the pump body relative to the pump base. The limiting protrusion and the elongated limiting hole restrict an expanse of rotation of the pump base relative to the pump body, when a user is trying to change between the two stable positions.
According to an exemplary embodiment of the invention, an area of an end of the limiting protrusion, extending from the pump body or the pump base, is dimensioned such that the limiting protrusion cannot pass through the limiting hole and subsequently limit a relative distant movements of the pump body and the pump base. This helps restrict the motion of the pump base away from the pump body and helps keep the pump base and the pump body engaged with each other.
According to an exemplary embodiment of the invention, the limiting protrusion is removably screwed into the pump body or the pump base. The limiting protrusion may be screwed or unscrewed as per application requirements.
According to an exemplary embodiment of the invention, the rotation of the pump body relative to the pump base defines a first operative configuration when the at least one positioning rib rests on the positioning column. According to an exemplary embodiment of the invention, the first operative configuration is a dirty water operation. The dirty water operation refers to when the water contains impurities bigger than a certain size. The at least one positioning ribs, when resting on the positioning column, allows the bigger size impurities to pass through and operate the water pump accordingly.
According to an exemplary embodiment of the invention, the rotation of the pump body relative to the pump base defines a second operative configuration when the at least one positioning rib rests next to the positioning column. According to an exemplary embodiment of the invention, the second operative configuration is a clean water operation. The clean water operation refers to when the water does not contain impurities bigger than a certain size. The at least one positioning ribs, when resting adjacent to the positioning column, does not allow the bigger size impurities to pass through and operate the water pump accordingly.
Other features and aspects of this invention will be apparent from the following description and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described in more detail with reference to the enclosed drawings, wherein:

FIG. 1 illustrates a top perspective view of a water pump in accordance with an exemplary embodiment of the present disclosure;
FIG. 2 illustrates a cross-sectional view of a pump body rotationally coupled to a pump base in accordance with an exemplary embodiment of the present disclosure;
FIG. 3 illustrates a bottom view of a pump body in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 illustrates another bottom view of a pump body accordance with an exemplary embodiment of the present disclosure;
FIG. 5 illustrates a perspective view of a pump base in accordance with an exemplary embodiment of the present disclosure;
FIG. 6 illustrates a bottom view of a pump base in accordance with an exemplary embodiment of the present disclosure;
FIG. 7 illustrates a perspective view of a pump in the first operational position F1with the lower portion of a pump body removed in accordance with an exemplary embodiment of the present disclosure;
FIG. 8 illustrates a top cross-sectional view of a pump in the first operative configuration F1 in accordance with an exemplary embodiment of the present disclosure;
FIG. 9 illustrates another perspective view of a pump in the second operational position F2 with the lower portion of a pump body removed in accordance with an exemplary embodiment of the present disclosure;
FIG. 10 illustrates a top cross-sectional view of a pump in the second operative configuration F2 in accordance with an exemplary embodiment of the present disclosure;
FIG. 11 illustrates a cross-sectional view of a pump body connected to a pump base in a second operative configuration F2 in accordance with an exemplary embodiment of the present disclosure; and
FIG. 12 illustrates a cross-sectional view of a pump body connected to a pump base in a first operative configuration F1 in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE DRAWINGS

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which example embodiments of the invention incorporating one or more aspects of the present invention are shown. This invention may, however, 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 be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. For example, one or more aspects of the present invention may be utilized in other embodiments and even other types of structures and/or methods. In the drawings, like numbers refer to like elements.
Certain terminology is used herein for convenience only and is not to be taken as a limitation on the invention. For example, "upper", "lower", "front", "rear", "side", "longitudinal", "lateral", "transverse", "upwards", "downwards", "forward", "backward", "sideward", "left", "right", "horizontal", "vertical", "upward", "inner", "outer", "inward", "outward", "top", "bottom", "higher", "above", "below", "central", "middle", "intermediate", "between", "end", "adjacent", "proximate", "near", "distal", "remote", "radial", "circumferential", or the like, merely describe the configuration shown in the Figures. Indeed, the components may be oriented in any direction and the terminology, therefore, should be understood as encompassing such variations unless specified otherwise.
FIG. 1 illustrates a top perspective view of a water pump 100. The water pump 100 will be hereinafter interchangeably referred to as the pump 100. In the illustrated embodiment, the pump 100 is a submersible-type water pump 100. The pump 100 includes a pump body 200 and a pump base 300 rotationally coupled to the pump body 200. Further, the pump base 300 can be moved away and towards the pump body 200.
The pump body 200 includes a handle 202 configured to raise or lower the pump 100, into or out of a volume of water to be pumped, and /or to transport the pump 100. Further, the pump body 200 includes a first port 204 coupling the pump 100 with a power cable, such that the pump 100 receive electrical power for its operation, through the power cable. Further, the pump body 200 includes a second port 206 coupling the pump 100 with a float switch cable that further couples to a float switch (not shown). Further, the pump body 200 includes a pump housing 208, such that the pump housing 208 includes the hydraulics required to suck in and pressurize the water.
FIG. 2 illustrates a cross-sectional view of the pump body 200 rotationally coupled to the pump base 300. The pump body 200 defines a water inlet 210 and a water outlet 212. The water inlet 210 is configured to allow ingress of water into the pump body 200, and the water outlet 212 is configured to allow delivery of the pressurized water from the pump body 200. The pump body 200 further includes the pump housing 208, such that the pump housing 208 includes the hydraulics required to suck in and pressurize the water surrounding the pump 100. In other words, the pump 100, particularly the pump housing 208 of the pump 100, includes a motor 214 to pressurize water entering via the water inlet 210, and further includes an impeller 216 connected to the motor 214 via a shaft 218, such that the shaft 218 is configured to transfer the rotational force of the motor 214 to the impeller 216. Further, the water pressurized by the motor 214 is delivered for various applications via the water outlet 212.
FIG. 3 illustrates a bottom view of the pump body 200. The pump body 200 defines the water inlet 210 and the water outlet 212. The pump body 200 is fixed as an assembly using three screws 220. The pump body 200 further exhibit various cooperating structures, configured to cooperate with the corresponding cooperating structures of the pump base 300. The pump body 200 exhibits at least one positioning rib 222, at least one protruding channel 226 to at least partially house the at least one limiting protrusion 224, and at least two cooperating indents 228 located adjacent to each other such that one of the two adjacent cooperating indents 228 exhibit a holding indent 230.
FIG. 4 illustrates another bottom view of the pump body 200. The pump body 200 exhibits various cooperating structures for cooperating with the corresponding cooperating structures of the pump base 300. The pump body 200 exhibits at least one positioning rib 222, at least one limiting protrusion 224 that is at least partially housed in the corresponding at least one protruding channel 226. The at least one protruding channel 226 is at least one elongate channel designed to at least partially house the at least one limiting protrusion 224. In one embodiment the protruding channel 226 has windings on its inner side that cooperate with windings on the outer side of the limiting protrusion 224 to allow to screw the limiting protrusion 224 at least partially into the protruding channel 226.
Further, the pump body 200 exhibits at least two cooperating indents 228 located adjacent to each other. With one cooperating indents 228 exhibit the holding indent 230.
FIG. 5 illustrates a perspective view of the pump base 300. The pump base 300 exhibits a support structure 302 having a plurality of legs 304. The support structure 302 is configured to support the pump base 300, and/ or the pump 100 on a ground surface. The pump base 300 further exhibit various cooperating structures, configured to cooperate with the corresponding cooperating structures of the pump body 200, when the pump body 200 and the pump base 300 are connected to each other. The pump based 300 exhibits at least one positioning column 306 to cooperate with the positioning rib 222, at least one stabilization protrusion 308 to cooperate with the cooperating indents 228 and the holding indent 230, and at least one elongated limiting hole 310 to cooperate with the at least one limiting protrusion 224.
FIG. 6 illustrates a bottom view of the pump base 300. The pump base 300 exhibits a suction aperture 312 configured to allow ingress of the water into the water inlet 210 of the pump body 200. The suction aperture 312 is a circular grid-like structure. Further, the pump base 300 exhibits the support structure 302 configured to support the pump base 300, and/ or the pump 100 on the ground surface. The pump base 300 further exhibit various cooperating structures, configured to cooperate with the corresponding cooperating structures of the pump body 200, when the pump body 200 and the pump base 300 are connected to each other. The pump based 300 exhibits at least one cooperating positioning column 306, at least one stabilization protrusion 308, and at least one elongated limiting hole 310.
FIG. 7 illustrates a perspective view of the pump 100 with a lower portion of the pump body 200 removed. The pump base 300 is rotationally coupled to the pump body 200, such that the pump base 300 can be moved away and towards the pump body 200. FIG. 7 illustrates the pump base 300 that is moved away from the pump body 200.
The pump body 200 and the pump base 300 exhibit cooperating structures that allow the pump base 300 to stably rest in at least two relative positions when rotating the pump body 200 relative to the pump base 300. The pump body 200 has at least one positioning rib 222 and the pump base 300 has at least one cooperating positioning column 306 or vice versa such that the rotation of the pump body 200 relative to the pump base 300 makes the at least one positioning rib 222 either rest on the positioning column 306 or next to the positioning column 306, and thereby allow for a different relative position of the pump body 200 and the pump base 300 respectively. However, as illustrated in FIG. 7 , the pump body 200 has at least one positioning rib 222 and the pump base 300 has at least one cooperating positioning column 306 such that the rotation of the pump body 200 relative to the pump base 300 makes the at least one positioning rib 222 rest on the positioning column 306. This arrangement defines a first operative configuration "F1". The first operative configuration "F1" is a dirty water operation, such that dirty water, enters the pump 100 via the suction aperture 312 provided in the pump base 300.
FIG. 8 illustrates a top cross-sectional view of the pump 100 in the first operative configuration "F1". In this configuration, the at least one positioning rib 222 rests on the positioning column 306, such that more space is available for water, particularly the dirty water to enter the pump 100. Further, the pump body 200 exhibits the limiting protrusion 224, and the pump base 300 exhibits the cooperating elongated limiting hole 310, that limits the rotation of the pump body 200 relative to the pump base 300.
In other words, when there is relative rotation between the pump body 200 and the pump base 300, the elongated hole 310 defines the maximum level of rotation that can happen between them. In other words, when there is relative rotation between the pump body 200 and the pump base 300, the limiting protrusion 224 travels from a first end 314 of the elongated hole 310 to a second end 316 of the elongated hole 310, and vice-versa, such that the limiting protrusion 224 is confined between the first end 314 and the second end 316 of the elongated hole 310, thereby limiting the extent to which the relative rotation between the pump body 200 and the pump base 300 can happen. In the illustrated FIG. 8 , the limiting protrusion 224 travels from the first end 314 of the elongated hole 310 to the second end 316 of the elongated hole 310 to allow the pump 100 to achieve the first operative configuration "F1".
Further, the pump base 300 exhibits the stabilization protrusion 308, and the pump body 200 exhibits at least two cooperating indents 228, so that after rotating the pump body 200 relative to the pump base 300 the positioning of the pump housing 208 in respect to the pump base 300 is stabilized. In other words, when the pump body 200 is rotated relative to the pump base 300 to get into the first operative configuration "F1", the pump body 200 remains in the first operative configuration "F1" due to the one of the at least two cooperating indents 228 located adjacent to each other, unless, prompted by a user of the pump 100.
FIG. 9 illustrates another perspective view of the pump 100 with a portion of the lower pump body 200 removed. The pump base 300 is rotationally coupled to the pump body 200, such that the pump base 300 can be moved away and towards the pump body 200. FIG. 9 illustrates the pump base 300 that is moved towards the pump body 200.
The pump body 200 and the pump base 300 exhibit cooperating structures that allow the pump base 300 to stably rest in at least two relative positions when rotating the pump body 200 relative to the pump base 300. However, as illustrated in FIG. 9 , the pump body 200 has at least one positioning rib 222 and the pump base 300 has at least one cooperating positioning column 306 such that the rotation of the pump body 200 relative to the pump base 300 makes the at least one positioning rib 222 rest next to the positioning column 306, what defines a second operative configuration "F2". The second operative configuration "F2" is a clean water operation, such that clean water, enters the pump 100 via the suction aperture 312 provided in the pump base 300.
FIG. 10 illustrates a top cross-sectional view of the pump 100 in the second operative configuration "F2". In this configuration, the at least one positioning rib 222 rests next to the positioning column 306. Further, the pump body 200 exhibits the limiting protrusion 224, and the pump base 300 exhibits the cooperating elongated limiting hole 310, that limits the rotation of the pump body 200 relative to the pump base 300.
In other words, when there is relative rotation between the pump body 200 and the pump base 300, the elongated hole 310 defines the maximum level of rotation that can happen between them. In other words, when there is relative rotation between the pump body 200 and the pump base 300, the limiting protrusion 224 travels from the first end 314 of the elongated hole 310 to the second end 316 of the elongated hole 310, and vice-versa, such that the limiting protrusion 224 is confined between the first end 314 and the second end 316 of the elongated hole 310, thereby limiting the extent to which the relative rotation between the pump body 200 and the pump base 300 can happen. In the illustrated FIG. 10 , the limiting protrusion 224 travels from the second end 316 of the elongated hole 310 to the first end 314 of the elongated hole 310 to allow the pump 100 to achieve the second operative configuration "F2".
Further, the pump base 300 exhibits the stabilization protrusion 308, and the pump body 200 exhibits at least two cooperating indents 228, so that after rotating the pump body 200 relative to the pump base 300 the positioning of the pump housing 208 in respect to the pump base 300 is stabilized. In other words, when the pump body 200 is rotated relative to the pump base 300 to get into the second operative configuration "F2", the pump body 200 remains in the second operative configuration "F2" due to the one of the at least two cooperating indents 228 located adjacent to each other, unless, prompted by the user of the pump 100 to get back into the first operative configuration "F1" by lifting and subsequent rotating of the pump body 200. Further, the indent 228 responsible for the holding the pump 100 in the second operative configuration "F2" also includes the holding indent 230. The cooperation of the stabilization protrusion 308 with the holding indent 230 ensures that the pump body and the pump base do not get unintentionally disengaged with each other, in particular due to gravitational forces acting on the pump base when the pump is lifted from the ground surface.
In other words, the pump body 200 exhibits the holding indent 230, and the pump base 300 exhibits cooperating stabilization protrusion 308 that prevents the relative motion of the pump base 300 away from the pump body 200. In other words, when the pump 100 is in the second operative configuration "F2", the engagement between the holding indent 230, and the cooperating stabilization protrusion 308, prevents the pump base 300 from free-fall, in particular due to gravitational forces acting on the pump base when the pump is lifted from the ground surface.
FIG. 11 illustrates a cross-sectional view of the pump body 200 connected to the pump base 300 in the second operative configuration "F2". In this configuration, the water inlet 210 of the pump body 200 is disposed directly on top of the suction aperture 312 of the pump base 300 such that the water inlet 210 of the pump body 200 rests upon the suction aperture 312 of the pump base 300.
Further, the pump body 200 exhibits the limiting protrusion 224, and the pump base 300 exhibits the cooperating elongated limiting hole 310 such that the limiting protrusion 224 is removably screwed into the pump body 200 via the elongated limiting hole 310.
An area of an end 232 of the limiting protrusion 224, extending from the pump body 200, is dimensioned such that the limiting protrusion 224 cannot pass through the limiting hole 310 and subsequently limit a relative distant movements of the pump body 200 and the pump base 300. In other words, the limiting hole 310 includes a mouth portion 318 that does not allow the end 232 of the limiting protrusion 224 to get outside the limiting hole 310, and hence limit the maximum vertical distance by which the pump base 300 can move away from the pump body 200.
In the illustrated FIG. 11 , the pump 100 is in second operative configuration "F2", such that pump base 300 has moved towards the pump body 200 and the end 232 of the limiting protrusion 224 is located proximal to the bottom of the limiting hole 310.
FIG. 12 illustrates a cross-sectional view of the pump body 200 connected to the pump base 300 in the first operative configuration "F1". In this configuration, the water inlet 210 of the pump body 200 is disposed directly on top of the suction aperture 312 of the pump base 300 such that the water inlet 210 of the pump body 200 is located away from the suction aperture 312 of the pump base 300.
Further, the pump body 200 exhibits the limiting protrusion 224, and the pump base 300 exhibits the cooperating elongated limiting hole 310 such that the limiting protrusion 224 is removably screwed into the pump body 200 via the elongated limiting hole 310.
The area of an end 232 of the limiting protrusion 224, extending from the pump body 200, is dimensioned such that the limiting protrusion 224 cannot pass through the limiting hole 310 and subsequently limit the relative distant movements of the pump body 200 and the pump base 300. In other words, the limiting hole 310 includes the mouth portion 318 that does not allow the end 232 of the limiting protrusion 224 to get outside the limiting hole 310, and hence limit the maximum vertical distance by which the pump base 300 can move away from the pump body 200.
In the illustrated FIG. 12 , the pump 100 is in first operative configuration "F1", such that pump base 300 has moved away from the pump body 200 to the maximum extent possible. Further, in this configuration, the end 232 of the limiting protrusion 224 is located at the bottom side of the mouth portion 318 that does not allow the end 232 of the limiting protrusion 224 to get outside the limiting hole 310.
In the drawings and specification, there have been disclosed exemplary embodiments and examples of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation of the scope of the invention being set forth in the following claims.

LIST OF ELEMENTS

100: Water Pump/ Pump
200: Pump Body
202: Handle
204: First Port
206: Second Port
208: Pump Housing
210: Water Inlet
212: Water Outlet
214: Motor
216: Impeller
218: Shaft
220: Screws
222: Positioning Rib
224: Limiting Protrusion
226: Protruding Channel
228: Indents
230: Holding Indent
232: End
300: Pump Base
302: Support Structure
304: Legs
306: Positioning Column
308: Stabilization Protrusion
310: Elongated Limiting Hole
312: Suction Aperture
314: First End
316: Second End
318: Mouth Portion
F1: First Operative Configuration
F2: Second Operative Configuration

Claims

A water pump (100) comprising:
a pump body (200) defining a water inlet (210);

a motor (214) to pressurize water entering via the water inlet (210);

the pump body (200) further defining a water outlet (212) to deliver water pressurized by the motor (214);

a pump base (300) rotationally coupled to the pump body (200), wherein the pump base (300) can be moved away and towards the pump body (200);

wherein the pump body (200) and the pump base (300) exhibit cooperating structures that allow the pump base (300) to stably rest in at least two relative positions when rotating the pump body (200) relative to the pump base (300);

characterized in that:
either the pump body (200) has at least one positioning rib (222) and the pump base (300) has at least one cooperating positioning column (306) or vice versa;

wherein rotation of the pump body (200) relative to the pump base (300) makes the at least one positioning rib (222) either rest on the positioning column (306) or next to the positioning column (306), and thereby allow for a different relative position of the pump body (200) and the pump base (300) respectively.
The water pump (100) of claim 1, wherein either the pump body (200) exhibits a stabilization protrusion (308), and the pump base (300) exhibits at least two cooperating indents (228) or vice versa, so that after rotating the pump body (200) relative to the pump base (300) the positioning of the pump housing (208) in respect to the pump base (300) is stabilized.
The water pump (100) of claim 1, wherein the pump body (200) exhibits a holding indent (230), and the pump base (300) exhibits a cooperating stabilization protrusion (308) that prevents the relative motion of the pump base (300) away from the pump body (200).
The water pump (100) of claim 1, wherein either the pump body (200) exhibits a limiting protrusion (224), and the pump base (300) exhibits a cooperating elongated limiting hole (310) or vice versa, that limits the rotation of the pump body (200) relative to the pump base (300).
The water pump (100) of claim 4, wherein an area of an end (232) of the limiting protrusion (224), extending from the pump body (200) or the pump base (300), is dimensioned such that the limiting protrusion (224) cannot pass through the limiting hole (310) and subsequently limit a relative distant movements of the pump body (200) and the pump base (300).
The water pump (100) of claims 4 or 5, wherein the limiting protrusion (224) is removably screwed into the pump body (200) or the pump base (300).
The water pump (100) according to any of the preceding claims, wherein the rotation of the pump body (200) relative to the pump base (300) defines a first operative configuration (F1) when the at least one positioning rib (222) rests on the positioning column (306).
The water pump (100) of claim 7, wherein the first operative configuration (F1) is a dirty water operation.
The water pump (100) according to any of the preceding claims, wherein the rotation of the pump body (200) relative to the pump base (300) defines a second operative configuration (F2) when the at least one positioning rib (222) rests next to the positioning column (306).
The water pump (100) of claim 9, wherein the second operative configuration (F2) is a clean water operation.