A device for maintaining the rotation of a filtration element for aquatic equipment, and the use of such a device

Abstract

This device comprises two supports (1, 2), each designed to receive a respective edge (1030, 1040) of the filter element frame. Each support (1, 2) includes two wheels (7, 7', 8, 8') designed to rotate when the edges of the frame are rotated. According to the invention, each support comprises a base (10, 20) and two webs (3, 4; 5, 6), respectively inner and outer. These webs define an intercalated volume (V1, V2). Each wheel is at least partially received within the intercalated volume and has two axles (76, 78; 76', 78'; 86, 88; 86', 88'), each of which is rotatably mounted on a respective web. The device according to the invention is lightweight and compact, while still allowing for reliable cleaning of the filter element. Furthermore, this device features quick and intuitive assembly and can be conveniently adapted to filter elements of different sizes.Finally, this device can be manufactured on a large scale, industrially, so its production cost is low. Figure for the abbreviation: [Fig. 8].

Description

Title of the invention: Device for maintaining the rotation of a filtration element for aquatic equipment, and use of such a device Technical field of the invention

[0001] The invention relates to the field of aquatic equipment which includes, within the meaning of the invention, among others, swimming pools and spas. It relates more particularly to a device for maintaining the rotation of a filtration element, which is integrated into such aquatic equipment. The invention also relates to the use of such a device in aquatic equipment. State of the art

[0002] Aquatic equipment of the above type comprises a water circulation circuit, on which a filtration element is placed. The latter makes it possible to retain dirt and other micro-organisms, likely to accumulate in this circuit. It is understood that it is necessary to periodically clean this filtration element, so that it retains its properties.

[0003] For this purpose, different types of filters are known, among which we will first mention those using sand. These sand filters have certain disadvantages, in particular in that it is necessary to use a very high quantity of water for their cleaning. The invention therefore relates more particularly to so-called cartridge filters, which are formed by a frame around the periphery of which a filtering medium is folded. The quantity of water necessary for cleaning cartridge filters is significantly lower than that required for sand filters, according to a ratio which can range from 10 to 100.

[0004] Several devices are known for cleaning cartridge filters. First of all, there are combs, which are, however, tedious to use. Enclosures have also been proposed in which the cartridge, arranged vertically, is cleaned using a water jet. However, these enclosures cannot be adapted to different cartridge lengths.

[0005] In order to overcome these drawbacks, the company Arnaud Morisset has marketed under the reference "NETFILTRE" a device in which the filtration element is positioned horizontally. Structurally, this device comprises two lateral support blocks connected by an intermediate platform. Each block is equipped with two rollers, on which a respective end of the cartridge frame rests. In use, a user sprays water onto the outer periphery of the filter media. Under this action, the filter element begins to rotate around an axis ho rizontal, so that the dirt is ejected from the filter media by centrifugal force.

[0006] The “NETFILTRE” solution, however, comes with specific drawbacks. Thus, this device is heavy and bulky, so that it is not possible to give it a storage position with a limited volume. Furthermore, the assembly of this device is particularly long. Even if this device can cooperate with cartridges of various sizes, the adaptation between the different configurations proves tedious.

[0007] Furthermore, the “NETFILTRE” device has a high cost price, while not lending itself conveniently to large-scale industrialization. Finally, this device is not entirely satisfactory in terms of stability, so that, at high rotation speed, the cartridge is likely to be ejected from this device.

[0008] In view of the above, an objective of the present invention is therefore to remedy, at least partially, the drawbacks of the prior art mentioned above.

[0009] Another objective of the invention is to provide a lightweight and compact device which allows a filtration element for aquatic equipment to be reliably cleaned.

[0010] Another objective of the invention is to provide such a device which is accompanied by rapid and intuitive assembly, while being able to adapt conveniently to filtration elements of different sizes.

[0011] An additional objective of the invention is to provide such a device which can be manufactured on a large scale, on an industrial level, so that its cost price is low.

[0012] Yet another objective of the invention is to propose such a device, which provides satisfactory stability to the filtration element which it allows to be cleaned. Subject of the invention

[0013] According to the invention, at least one of the above objectives is achieved by means of a device (I) for maintaining the rotation of a filtration element (1000) for aquatic equipment, this filtration element comprising a frame (1010) as well as a filter medium (1050) provided at the periphery of this frame,

[0014] the device comprising two supports (1, 2), each of which is intended to receive a respective edge (1030, 1040) of the frame, each support (1, 2) comprising two wheels (7, 7', 8, 8') intended to rotate under the effect of the rotation of the edges of the frame,

[0015] characterized in that each support comprises a base (10, 20) as well as two sails (3, 4; 5, 6) respectively interior and exterior, these sails delimiting an intermediate volume (VI, V2), each wheel being at least partly received in the intermediate volume and having two axes (76, 78; 76', 78'; 86, 88; 86', 88') each of which is rotatably mounted on a respective veil.

[0016] According to other characteristics of the device according to the invention, taken in isolation or in any technically compatible combination:

[0017] - each sail (3, 4; 5, 6) comprises two end flanges (30, 31, 40, 41; 50, 51, 60,61) as well as an intermediate strip (32,42; 52,62) of lower height, each axis being rotatably mounted on a respective flange.

[0018] - each flange comprises a first wing (33,34, 43,44) ensuring the junction with the intermediate strip, as well as a second wing (35,36, 45,46) called stabilizing, extending to a respective end of the base.

[0019] - which the axles are made of material with a body of the wheel (7, 7', 8, 8').

[0020] - each wheel comprises a hub (72) made in one piece with the two axles, each axle being separated from the hub by a respective shoulder (77,79).

[0021] - each sail, in particular each flange, is provided with bearing surfaces (300,310, 400,410; 500,510, 600,610), each bearing being capable of receiving a respective axis by elastic snap-fastening.

[0022] - the wheel delimits a rolling track (73.73'; 83.83'), the diameter (D73) of said track being greater than 20 mm, preferably 70 mm.

[0023] - the track is extended radially by a collar (74.74'; 84.84'), the dimension radial of said collar between the track and the peripheral end of this collar being greater than 2 mm, preferably 15 mm.

[0024] - the device further comprises a connecting member (9) capable of mutually connecting the two supports (9, 10), this connecting member being advantageously composed of several tubular elements (90, 92) capable of being mutually fixed in a removable manner.

[0025] - each sail, in particular each strip, is provided with a housing (37,47) capable of receive a respective end of the connecting member, by elastic snap-fastening.

[0026] - the device is capable of adopting a storage position in which the wheels (7, 7', 8, 8') of one (1, 2) of the supports are at least partly received in the intermediate volume (V2, VI) of the other (2, 1) of these supports.

[0027] - each support comprises material recesses (16,17; 26,27) capable of receive the outer periphery, in particular the collar, of the other support.

[0028] - the device is made at least in part and, preferably, in its entirety in a moldable material, in particular by injection, preferably made of polyamide 6 or PolyOxyMethylene.

[0029] - the total mass of the device is less than 1 kilogram, preferably 500 g.

[0030] Another object of the invention is a use of the device (I) for maintaining in rotation above, for maintaining in rotation a filtration element (1000) for aquatic equipment during cleaning.

[0031] According to an advantageous characteristic of this use, a jet of liquid is projected onto the filtration element at a pressure greater than 2.5 bars, in particular 3 bars.

[0032] According to another advantageous characteristic of this use, this filtration element is rotated at a speed greater than 20 rpm, in particular greater than 50 rpm. Description of figures

[0033] The invention will be described below, with reference to the appended drawings, given solely as non-limiting examples, in which:

[0034] [Fig. 1] is a perspective view, illustrating a device for maintaining the rotation of a filtration element, in accordance with the invention.

[0035] [Fig.2] is a perspective view, illustrating from a first angle a support ap belonging to this rotational maintenance device.

[0036] [Fig.3] is a perspective view, illustrating from another angle the support of the [Fig.2],

[0037] [Fig.4] is a top view, illustrating the support of Figures 2 and 3.

[0038] [Fig.5] is a sectional view along line VV in [Fig.4].

[0039] [Fig.6] is a perspective view, illustrating a wheel capable of being mounted on rotation on the support of figures 2 to 5.

[0040] [Fig.7] is a diametrical sectional view illustrating the wheel of [Fig.6].

[0041] [Fig.8] is a perspective view, similar to [Fig.l], illustrating an element of filtration mounted on the holding device according to the invention.

[0042] [Fig.9] is a front view, according to arrow IX in [Fig.8], illustrating the element of filtration and the holding device [Fig.8].

[0043] [Fig. 10] is an end view, illustrating the cleaning of the filtration element of Figures 8 and 9, which is mounted on the holding device according to the invention.

[0044] [Fig. 11] is a perspective view, illustrating the mutual cooperation of the two supports belonging to the holding device, in a storage position.

[0045] [Fig. 12] is a front view, illustrating the supports of [Fig. 11] in this storage position. Detailed description

[0046] The present invention relates to the cleaning of a filter element, of the cartridge type, which is visible in particular in Figures 8 and 9. In a manner known per se, this filter element, designated as a whole by the reference 1000, firstly comprises a frame 1010. The latter is composed of a cylindrical barrel 1020 as well as two rims 1030 1040, provided at the opposite ends of the barrel. A filter medium 1050 of any suitable type extends to the outer periphery of the barrel. In order to increase the filtration surface, the media is folded on itself in the classic manner.

[0047] Figures 1 to 12 illustrate a device, designated as a whole by the reference I, allowing the filtration element 1000 to be kept rotating during its cleaning. As illustrated in particular in [Fig.l] the device I essentially comprises two lateral supports 1 and 2, four wheels 7, 7', 8 and 8' intended to be mounted on these supports, as well as a connecting member 9 allowing these supports to be connected. The various components of the device I according to the invention are made of a moldable material, in particular by plastic injection.

[0048] Advantageously, this constituent material is a PA6 (polyamide 6), better known under the trade name “NYLON”. As a variant, other alternative materials can be provided. In particular, it is appropriate to ensure that the pair of materials, constituting respectively the axis such as that 78 and the bearing surface such as that 300 which will be described below, do not undergo melting in service. Such melting could be due, in a situation that the invention makes it possible to avoid, to heating of the aforementioned parts under the effect of the friction induced by the rotation of the wheels of the device. In this spirit, it is also possible to use PolyOxyMethylene, or POM.

[0049] Figures 2 to 5 illustrate one 1 of the supports in more detail, it being understood that they both have the same structure. The support 1 comprises a base 10, from which extend two webs of material 3 and 4, corresponding to the webs 5 and 6 of the support 2. The webs 3 and 5 are said to be internal, in that they are turned towards each other in use, while the webs 4 and 6 are said to be external. The mechanical elements of the base 20 of the support 2, which are similar to those of the base 10 of the support 1, are assigned the same reference numbers increased by the number 10.

[0050] The base 10, of rectangular shape, is firstly hollowed out with a through central channel 11. For the sake of lightness, the base is perforated by two notches 12 mutually symmetrical with respect to the central channel, as well as by recesses 13 and 13' of smaller dimension provided on either side of each notch. On the upper face, with reference to a device resting on its base on a flat surface, the base is stiffened firstly by two transverse edges 14, extending between each notch 12 and the adjacent recess 13 facing the central channel 11.

[0051] Furthermore, between each notch 12 and the opposite recess 13', two transverse ribs 14 are provided, providing an additional foolproofing function. For this purpose, as shown in particular in [Fig. 9], each rib is asymmetrical when the base is an end view. Finally, the upper face of the base is hollowed out, on the side of the outer web 4, on the one hand with two grooves 16 on either side of the median channel, and on the other hand with two slots 17 at the level of the opposite longitudinal ends. These different material recesses 16 and 17 allow, in the position of storage shown in figures 11 and 12 described below, receiving the wheels of the other support 2.

[0052] We will now describe, in particular with reference to Figures 4 and 5, the sails 3 and 4 equipping the first support 1. The mechanical elements of the sails 5 and 6, similar to those of the sails 3 and 4, are assigned the same reference numbers increased by the number 20. Each sail 3 and 4 comprises two end plates 30, 31 and 40, 41, which are mutually separated by an intermediate strip 32, 42 of lower height. Each sail, which generally has the shape of an inverted V, has two wings. The first of these wings 33, 34 and 43, 44 ensures the junction with the intermediate strip, while the other of these wings 35, 36 and 45, 46 extends to a respective end of the base, which provides a stabilizing function.

[0053] In its upper part, each flange delimits a bearing surface 300, 310 and 400, 410. These bearing surfaces, the cylindrical walls of which extend over a sector slightly greater than 180°, are each extended by an introduction mouth 301, 311 and 401, 411 whose transverse dimension is slightly smaller than that of the respective bearing surface. Furthermore, each strip 32, 42 is hollowed out with a housing 37, 47, defining a bridge of upper material 39, 49. Each housing, which extends along an angular sector slightly greater than 180°, opens into the aforementioned median channel 11, the walls 110 of which have a section slightly smaller than that of the housing.

[0054] The sails 3 and 4 delimit an intermediate volume of the support 1, which is assigned the reference VI corresponding to the reference V2 of the intermediate volume formed by the sails 5 and 6 of the other support 2. In particular, the volume VI includes an intermediate volume V30 formed by the facing flanges 30 and 40, as well as another intermediate volume V31 formed by the facing flanges 31 and 4L. Similarly, there are intermediate volumes V50 and V51 at the level of the support 2.

[0055] As shown in particular in [Fig. 1], the connecting member 9 is of the tubular type. In the example illustrated, it comprises two connecting elements 90 and 92, the adjacent ends of which are denoted 91 and 93. These ends cooperate with each other, by any appropriate means, to ensure removable attachment between the connecting tubes 90 and 92. As a variant, it may be provided that the connecting member is formed by a single tube. As a further variant, this connecting member may be formed by several connecting tubes, in particular up to four of these tubes, which are removably assembled together.

[0056] Figures 6 and 7 illustrate one 7 of the wheels equipping the holding device according to the invention, it being understood that the different wheels have a similar structure. The mechanical elements of the other wheels 7', 8 and 8' are assigned the same reference numbers increased respectively by the suffix "prime", number 10, as well as the number 10 and the suffix “prime”.

[0057] The wheel 7 firstly comprises a body 70, of cylindrical shape, which extends around the central axis A7 of the wheel. This body is perforated, both on its inner side by a notch 71, as well as on its outer side by an additional notch 72. In order to provide the rigidity necessary for the use of the wheel, the body is reinforced by stiffening ribs, respectively inner 710 and outer 720.

[0058] The outer periphery of the body 70 delimits a rolling track 73, against which the filtration element will rotate as will be described below. Advantageously, the diameter D73 of this track is greater than 20 mm, preferably 70 mm. On the outer side of the wheel, the track is extended radially by a collar 74 intended to retain the filtration element, in service. Advantageously, the radial dimension R74 of the collar, measured between the track 73 and the periphery 740 of the collar, is greater than 3 mm, preferably 15 mm.

[0059] The notches 710 and 720 delimit a central hub 75, of smaller diameter. This hub is extended, both on the inner and outer sides, by axes 76 and 77 formed by molding. Typically, the diameter D76 of each axis is between 2 mm and 20 mm. The smaller the diameter, the lower the resistive torque. The larger the diameter, the higher the resistance. It is possibly possible to go below a value of 2 mm, in certain cases which are less preferred. In particular, in the case of overmolding around a metal axis, the minimum dimension may be close to 1 mm in diameter. The hub and each axis are separated by respective shoulders 78 and 79, which make it possible to bear against the wall of the bearing surfaces 300, 310 and 400, 410 described above.

[0060] The implementation of the rotation holding device, as described above, will now be explained.

[0061] First of all, the various wheels 7, 7', 8 and 8' are mounted on their respective supports 1 and 2, by elastic snap-fastening. For this purpose, each pair of axles, such as that 76 78, is first introduced into the mouths, such as those 301 and 401, before being received in the corresponding bearing surfaces, such as those 300 and 400. The wheels are then free to rotate, relative to their respective support, around axles extending horizontally when the support rests on its base. In [Fig.l], these axles are shown by the references A7, A7', A8 and A8'. Furthermore, the opposite faces of each wheel are bordered by flanges of the support, such as those 30 40 for the wheel 7. In other words, each wheel is received at least in part in the intermediate volume defined by these flanges, such as the wheel 7 in the intermediate volume V30 forming part of that VL

[0062] Furthermore, each tube 90 and 91 is made to penetrate into the housings of the support, such those 37 and 47 of the support 1. Advantageously, in the absence of force, the outside diameter of the tubes is slightly greater than the inside diameter of the housings. This makes it possible to provide a reliable connection between the tubes and the supports, while allowing a clearance allowing the distance between these supports to be adjusted. The thickness of the material bridge 39 / 49, located between the wall of the housing 37 / 47 and the top of the strip 32 / 42, influences both the rigidity of this zone as well as the force required to slide the tubes 90 and 92 relative to their support. The person skilled in the art will play on this thickness, so as to obtain the desired properties.

[0063] Once the various constituent parts of the device I have been mutually assembled, the filtration element 1000 is added. More precisely, the rim 1030 comes to bear against the rolling tracks 73 and 73' of the wheels of the first support 1, while the opposite rim 1040 comes to bear against the tracks 83 and 83' of the wheels of the other support. With reference to [Fig. 10], a jet J of liquid is then projected, which is conventionally water to which cleaning agents have possibly been added. Typically, this water is projected at a pressure greater than 2.5 bars.

[0064] In practice, the pressure of the jet depends on the pressure available in the individual's installation. This pressure is generally variable, typically being around 3 bars. The appropriate pressure, for rotating the cartridge, also depends on the size of this cartridge. If the water jet does not achieve the desired results, it may be recommended to use a high-pressure cleaner to rotate the cartridges, particularly if the pressure in the home is too low and / or if the size of the cartridge is too large.

[0065] The force exerted by the jet J causes the filtration element to rotate, according to the arrow F1000, at a speed typically greater than 20 rpm, in particular greater than 50 rpm. This movement of the filtration element 1000 causes the various wheels to pivot, as shown in particular by the arrows F7 and F7' in [Fig. 10]. In a manner known per se, the rotation of the filtration element causes, by centrifugal effect, the evacuation of the dirt which is shown by the arrows S in this same [Fig. 10].

[0066] Finally, it will be noted that the force f7', exerted on the wheel 7' by the rotating filtration element, extends inside the support. In other words, it does not extend beyond the stabilizing wing 44 or, in other words, this force is exerted below the straight line X44 connecting the axis 78' and the end of the base 10. The presence of this stabilizing wing 44 therefore prevents any tilting of the support around its base, which is shown by the crossed-out arrow F1 in [Fig. 10].

[0067] Figures 11 and 12 illustrate the supports 1 and 2, in a storage position accompanied by reduced bulk. Considering that the support 1 rests on a horizontal surface, it is a question of turning the support 2 over, placing it above the support 1 and then bring it closer to the latter. Wheels 8 and 8' then partially penetrate the intermediate volumes V30 and V31 of support 1, while wheels 7 and 7' are partially housed in the intermediate volumes V50 and V51 of support 2.

[0068] Furthermore, the collars 74 and 74' respectively penetrate into the grooves 26 as well as into the slot 27, while the collars 84 and 84 respectively penetrate into the grooves 16 and the slot 17. As shown in [Fig. 12] the presence of these slots and these grooves makes it possible, on the one hand, to align the bottom of each base 2 with the periphery of the collars 74 to 84' along horizontal lines XI and X2. Furthermore, the opposite ends of the bases 10 and 20 are aligned with the collars along vertical lines Y1 and Y2. This gives the device great compactness, once stored, in particular thanks to the absence of a projecting part.

[0069] The invention makes it possible to achieve the objectives mentioned above.

[0070] It will first be noted that it is to the applicant's credit to have identified the drawbacks linked to the above solution proposed by the Morisset company. Thus, in this prior device, the casters are offset relative to the support block. Under these conditions, when a filtration element is placed on the casters, the force it exerts tends to create a lateral tilting moment on the support blocks. In order to guarantee the overall maintenance of the device in position, it is therefore necessary to provide a central stabilizing platform which opposes the moments generated by the offset of the wheels. Under these conditions, at Morisset, the platform and the supports are deprived of a mutual degree of freedom in rotation, having a single mutual degree of freedom in translation. Once the distance between the supports has been adjusted, this single degree of freedom in translation is eliminated by screwing each support onto the platform.

[0071] On the contrary, the invention provides for placing each wheel between two webs of material belonging to the support. Consequently, when the filtration element rests on the supports of the device according to the invention, no significant moment is exerted on these supports. This characteristic is illustrated in [Fig. 9], which shows the forces fl000 which are exerted by the filtration element 1000 on the supports 2 and 3. Since these forces are directed between the webs 3 and 4, as well as 5 and 6, respectively, they do not create any significant moment likely to cause the aforementioned supports to tilt.

[0072] Under these conditions, it is possible to provide a connecting member that is significantly simpler than in the prior art. Preferably, a fixing between the support and the connecting member can be favored by elastic snap-fastening, which is easily removable and which allows the distance between these supports to be adjusted simply. Unlike the Morisset solution above, a controlled translation is possible between the supports and the connecting member by playing on the rigidity of the material bridges 39 / 49, as well than between the difference in diameters between the tubes 90 / 92 and the wall of the housings 37 / 47. It will also be noted that, advantageously, the overall mass of this device is very low, being less than 1 kilogram, preferably 500 g.

[0073] The low mass of the device is accompanied by another advantage, relating to the actual implementation of the device according to the invention. As presented above, when the filtration element is rotated, the entire device is likely to move relative to the ground. This guarantees dissipation of vibrations at ground level, thus allowing optimal operation of this device. This movement prevents in particular the filtration element from being ejected in an untimely manner, outside the holding device. In this spirit, the presence of wheel collars, the diameter of which is large, contributes to further improving this stability.

[0074] It is also particularly advantageous to produce at least part and, preferably, the entire device from a moldable material. This firstly makes it possible to guarantee the mass production of this device, in particular via an injection process. As a less preferred variant in terms of cost price, extrusion followed by cutting can be provided. The use of this moldable material also makes it possible to reduce the number of constituent parts of the device, by also allowing elastic snap-fastening between these different parts.

[0075] As seen above, an advantageous characteristic of the invention lies in the value of the diameter D73 of the rolling track. This measure makes it possible to reduce the rotational speed of the wheels, when the filtration element is set in motion on the holding device. This consequently induces a reduction in the rotational speed of the axes, such as those 76 and 78 of the wheel 7. Under these conditions the resistive torque is reduced, as is the heating, which contributes to extending the overall service life of the device, in particular of its wheels.

Claims

Claims

1. Device (I) for maintaining the rotation of a filtration element (1000) for aquatic equipment, this filtration element comprising a frame (1010) as well as a filtering medium (1050) provided at the periphery of this frame, the device comprising two supports (1, 2), each of which is intended to receive a respective rim (1030, 1040) of the frame, each support (1, 2) comprising two wheels (7, 7', 8, 8') intended to enter into rotation under the effect of the rotation of the rims of the frame, characterized in that each support comprises a base (10, 20) as well as two sails (3, 4; 5, 6) respectively inner and outer, these sails delimiting an intermediate volume (VI, V2), each wheel being at least partly received in the intermediate volume and having two axes (76, 78; 76', 78'; 86, 88; 86', 88') each of which is rotatably mounted on a respective veil.

2. Device according to the preceding claim, in which each sail (3, 4; 5, 6) comprises two end flanges (30, 31, 40, 41; 50, 51, 60, 61) as well as an intermediate strip (32, 42; 52, 62) of lower height, each axis being rotatably mounted on a respective flange, each flange advantageously comprising a first wing (33, 34, 43, 44) ensuring the junction with the intermediate strip, as well as a second wing (35, 36, 45, 46) called stabilization, extending to a respective end of the base.

3. Device according to one of the preceding claims, in which the axles are integral with a body of the wheel (7, 7', 8, 8'), each wheel advantageously comprising a hub (72) made in one piece with the two axles, each axle being separated from the hub by a respective shoulder (77, 79).

4. Device according to one of the preceding claims, in which each sail, in particular each flange, is provided with bearing surfaces (300,310, 400,410; 500,510, 600,610), each bearing surface being capable of receiving a respective axis by elastic snap-fastening.

5. Device according to one of the preceding claims, in which the wheel delimits a rolling track (73,73'; 83,83'), the diameter (D73) of said track being greater than 20 mm, preferably 70 mm, the track advantageously extending radially by a collar (74,74'; 84,84'), the radial dimension of said collar between the track and the peripheral end of this collar being advantageously greater than 2 mm, preferably 15 mm.

6. Device according to one of the preceding claims, further comprising a connecting member (9) capable of mutually connecting the two supports (9, 10), this connecting member being advantageously composed of several tubular elements (90, 92) capable of being mutually fixed in a removable manner, each sail, in particular each strip, being advantageously provided with a housing (37, 47) capable of receiving a respective end of the connecting member, by elastic snap-fastening.

7. Device according to one of the preceding claims, which is capable of adopting a storage position in which the wheels (7, 7', 8, 8') of one (1, 2) of the supports are at least partly received in the intermediate volume (V2, VI) of the other (2, 1) of these supports, each support advantageously comprising material recesses (16, 17; 26, 27) capable of receiving the outer periphery, in particular the collar, of the other support.

8. Device according to one of the preceding claims, which is made at least in part and, preferably, in its entirety from a moldable material, in particular by injection, preferably from polyamide 6 or from PolyOxyMethylene.

9. Use of a holding device (I) according to any one of the preceding claims, for holding in rotation a filtration element (1000) for aquatic equipment during its cleaning.

10. Use according to the preceding claim, in which a jet of liquid is projected onto the filtration element at a pressure greater than 2.5 bars, in particular 3 bars, and this filtration element is advantageously rotated at a speed greater than 20 rpm, in particular greater than 50 rpm.

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