Dome-forming water jet device for recreational use

Description

[0001] The invention relates to water jet devices for pleasure, for example of the fountain type or other.

[0002] Such devices are known from the state of the art, applying water jets distributed in regular angular steps over 360° with an ejection of water of a desired parabolic shape (apart from wind force or other disturbance). As shown in the figure 7 , such a device comprises several water inlet pipes Tub (under pressure) each adapted to emit a water jet J, such that all the jets form a hollow dome whose center is occupied by the pipes Tub.

[0003] Such a dome shape can provide a pleasant experience for users, not only visually or audibly (for the sound of the waterfall), but also for a search for freshness, with users being able to sit under the dome, as illustrated in the figure. figure 8 .

[0004] However, a device of the type illustrated in the figure 7 , with the center of the dome occupied by the water jet pipes, does not allow a realization such as illustrated on the figure 8 , for example with MOB furniture arranged inside the water dome J. A central column of water pipes Tub as illustrated in the figure 7 would prevent the installation of such furniture and would not allow users to see each other under the dome (thus cutting off the desired conviviality between users).

[0005] A solution is proposed in document DE 20 2006 011244, presenting a dome fountain device, formed by a set of parabolic and translucent water conveying columns. At the top of the dome, a distributor emits water covering the columns to create a water dome. In such an embodiment, the water dome thus has an interior space, to accommodate occupants or furniture. But it is also airtight, which gives it a "glass bell" appearance, and therefore does not have the same aesthetic appearance as a fountain with jets. In addition, this is made unsightly by the water conveying columns, which, despite their parabolic shape and transparency, form visible edges between the sides of the water bell.

[0006] The invention improves the situation.

[0007] For this purpose, it offers a water jet device, for pleasure, in particular of the fountain type, comprising:a jet head equipped with at least one water inlet opening and at least one set of water outlet nozzles, the nozzles of said set being arranged in the same plane and on a peripheral line of the jet head, the nozzles having respective outlets oriented towards the outside of the jet head, a water flow regulator supplying the nozzles to produce, during use, a water speed defining a water jet, at the outlet of each nozzle, having a trajectory of substantially parabolic shape, chosen, the set of water jets at the outlet of the nozzles forming at least a portion of a dome during use, and at least one water supply column, made of a rigid material, and comprising an inlet connected to a water inlet and a water outlet connected to the opening of the jet head and mechanically secured thereto,said power column having said parabolic shape chosen to be confused with the dome during use, , and characterized in that the opening of the jet head, intended to receive said at least one water supply column, is at the same angular distance from the water outlet nozzles located on either side of the opening of the jet head and in the same plane as said water outlet nozzles.

[0008] Thus, it will be understood that the aforementioned jet head is arranged at the top of the aforementioned dome, which forms the set of water jets. It is then appropriate to provide at least one rigid conduit, which forms the aforementioned column, ensuring both the supply of water to the jet head and the mechanical maintenance of the head at the top of the dome (as illustrated in the figure 1 commented on in detail later). The column, being itself of the same general shape as a jet, it thus blends advantageously with the dome.

[0009] The jet head may comprise a set of nozzles arranged in the same plane, or several sets of nozzles (N sets) arranged in respective parallel planes (N planes), in order to confer “a thickness of water” to the aforementioned dome.

[0010] The dome itself can be in the shape of a half-sphere cupola or any other dome shape.

[0011] In the case of a hemisphere typically, the nozzles of said assembly may be arranged on at least one arc of a circle in the same plane (this arc of a circle forming the aforementioned peripheral line). The respective outlets of the nozzles are then oriented towards the outside of a portion of cylinder (as illustrated in the figure 2a ) or cone (as shown in the figures 2b, 2c ) with a summit located above the jet head, and a central axis perpendicular to the plane of all the nozzles. The portion of the dome formed by all the water jets leaving the nozzles thus has the shape of a portion of a dome.

[0012] In such an embodiment, the head may typically have a round shape.

[0013] Alternatively, the shape of the head may be elliptical or oblong, in which case the dome has the shape of an ellipsoid of revolution or the like. The head may also have a polygonal shape, thus generating a dome whose trace on a horizontal plane corresponds to a polygon.

[0014] Furthermore, the nozzles can be, for example, distributed around the circumference of the head (or only over a part of this circumference to allow, for example, users to "enter" under the dome without being sprayed). Of course, the jets from each nozzle can be interrupted by controlling at least one valve mounted on each nozzle, as will be seen later, which makes it possible to maintain an embodiment in which the nozzles are distributed around the circumference of the head while allowing users to enter under the dome without being sprayed, by simply interrupting the jet from a few nozzles momentarily.

[0015] Furthermore, "jets" from the head are understood to mean that this jet head can emit continuous jets of water, cyclically interrupted jets of water (successive continuous "lines") or "drop by drop" jets of water (in "dotted" lines, rain type) by means of the water inlet therein.

[0016] The nozzles of the same set are arranged, for example, in regular angular steps, in the same plane, making it possible to obtain the desired regular dome or cupola shape, thanks to the spatial arrangement of the nozzles. Thus, the shape of the dome depends on: The speed of the water exiting the nozzles (forming the aforementioned parabolic trajectory), on the one hand, and the shape of the periphery of the jet head (oval, polygonal, round or other).

[0017] The water inlet column is mechanically secured (typically without any intended possibility of relative movements between the water inlet column and the jet head). The opening of the jet head, intended to receive the water supply column, is for example at the same angular distance from the nozzles located on either side of it and in the same plane as the nozzles of the head (see for example the figure 2a ).

[0018] The end of the column may include a tube with a diameter slightly smaller than the diameter of the opening of the jet head, so that it can, for example, be forced into it, in an embodiment where all the constituent parts of the device are offered as a kit.

[0019] Advantageously, the water supply column is designed in a rigid material to support the jet head. In addition, the column is of the same parabolic shape as that of the jets (same coefficient "a" of type y=ax 2< ) in order to integrate perfectly into the dome with the jets coming from the head. An optical effect is created, and the user has the illusion of seeing a dome of only water.

[0020] The jet head may have its nozzles arranged on a portion of the cylinder as shown in the figure 2a described in detail below, or alternatively, be arranged on a portion of a cone, as illustrated in the figure 2c , on which the apex S of the cone is located above the jet head 1. In either of these configurations, the central axis of the cylinder or cone is perpendicular to the plane of the jet head (i.e. the plane in which the arc of the circle formed by the nozzles is inscribed). This plane of the nozzles can be horizontal as shown in the figure 2a or on the figure 2c . However, it can be slightly inclined if necessary to achieve some aesthetic effect. However, it must remain below 90° to ensure the jets have a substantially parabolic shape to obtain the desired dome (or more precisely, cupola) effect.

[0021] The jets at the outlet of a portion of the cylinder as illustrated in the figure 2a are first in a horizontal plane, then "fall" downwards, as illustrated in the figure 9a . In the embodiment where the nozzles are inscribed in a portion of cone with the apex upwards and half-angle α as illustrated in the figure 2c , the jet exits with this angle α so as to reach a range xb, as illustrated in the figure 9b , this range xb being able to be greater than the range xa ​​of the case of a cylindrical base ejection of the figure 9a . Indeed, if for example the angle α is close to 45°, the range xb can be maximum, which can thus allow a large space to be arranged under the dome (possibly tables and chairs as illustrated in the figure 8 ).

[0022] It should be noted, however, that a "perfect" dome shape (as illustrated in the figure 1 ) is obtained with an angle of inclination of the jet head nozzles equal to 0° (corresponding to a configuration of the nozzles on a cylindrical base as illustrated in the figure 2a ).

[0023] Thus, the generic term "dome" here means both the cupola shape shown on the figure 1 , a dome shape slightly flattened at its top, or even slightly hollow with a non-zero angle α. Similarly, the "dome" can have a generally rounded shape towards the bottom, but can be alternatively square-based, or more generally polygonal.

[0024] However, in one embodiment of the invention where a dome shape is desired, the nozzles of the aforementioned set of nozzles are arranged on at least one arc of a circle in the same plane, the nozzles comprising respective outlets oriented towards the outside of a portion of cylinder or cone with a summit located above the jet head, and with a central axis perpendicular to said same plane, the portion of dome formed by the set of water jets leaving the nozzles having more particularly a dome portion shape.

[0025] Of course, the plane of all the nozzles of the jet head forms a non-zero angle with a vertical plane (so as to maintain a parabolic jet trajectory shape, and an overall dome shape).

[0026] In one embodiment of the invention, the columns are designed in a rigid material that is at least translucent (or even transparent) to blend perfectly with the jets coming from the nozzles of the head. Thus, the material chosen can be a polymer, for example of the plexiglass type, or glass, or other.

[0027] In one embodiment of the invention, the device comprises a holding base, mechanically secured to the inlet of the column and which, preferably, extends over a distance, from the inlet of the column, greater than or equal to a diameter of the dome.

[0028] Such a "supporting base" bears the reference 4 on the figure 1 and on the figure 3 . In the examples illustrated, it may be a ring (or another shape such as polygonal, elliptical, or ring section), connected to the base of each of the water inlet columns 2. This base thus ensures the support of the device in its entirety and more particularly of the water jet head. In an embodiment presented in detail later, the holding base is configured as a gutter to collect the water from the head and its diameter thus corresponds to the trace of the dome on the ground. It is then understood that in such an embodiment, it is preferable to control a regular flow of water at the outlet of the jet head, so as to collect in the aforementioned gutter the majority of the water from the jet head.

[0029] In one embodiment of the invention, the jet head is generally elliptical, circular, or polygonal (for example rectangular or square), or oval (as illustrated in the figure 10 ) and includes a plurality of openings distributed at regular angles on the general shape. The device may then include a plurality of water supply columns (as also illustrated in the figure 10 or even on the figure 3 ), all made of a translucent rigid material and each comprising an inlet connected to a water inlet and a water outlet connected to an opening provided in the jet head and mechanically secured to it. These supply columns also preferably each have the aforementioned parabolic shape, chosen.

[0030] Such an embodiment with several water supply columns advantageously makes it possible to provide large dome shapes (high and wide) and thus to support the weight of a jet head sized to eject a quantity of water at a high flow rate. Such an embodiment typically makes it possible to obtain a result as illustrated in the figure 8 with furniture that can be installed under the dome (here a cupola) without getting it wet. The columns can be: connected by a gutter or hollow ring (as shown in the figure 3 ) for water circulation inside to supply the columns, with a single water inlet (reference 13 of the figure 3 ), or each connected to an independent water supply.

[0031] The hollow ring forming the support base can be made from the same material as the water inlet columns (rigid and translucent).

[0032] In another variant, only one column is supplied with water while the others only serve to maintain the device. They are parabolic in shape like one of the jets and made of a translucent and solid material. They can be solid or hollow.

[0033] In one embodiment of the invention, each of the column inlets is mechanically secured to the holding base, and, the holding base being of the same general shape as the jet head, the column inlets are distributed at regular distances on said general shape of the holding base, the columns and the base thus forming a “multipod” as illustrated in the example of the figure 3 .

[0034] In one embodiment of the invention, the holding base comprises at least one water recovery tank, forming said water inlet, and the device comprises a water pump for the recovery tank, connected to the flow regulator.

[0035] In this embodiment, the device recycles the water ejected from the head. The recovery tank may be filled with water before the device is actually put into operation. In the case of a water supply, for example, the water recovery tank may store the water flowing from the jets of the sprinkler head, so as to fill an internal reservoir 11 (as illustrated in the figure 5 ). A pump can be provided in this tank, using the water from the tank to reinject it again towards the jet head, this pump then being controlled by the aforementioned flow regulator.

[0036] In one embodiment of the invention, the device further comprises a pressure gauge cooperating with the flow regulator to measure a pressure in the jet head. The flow regulator is arranged in particular to increase the flow of water from the water inlet, in the event of detection of a pressure in the jet head lower than a predetermined threshold.

[0037] Thus, particularly when the device includes a water collection tank for example, the pressure gauge measures the water pressure at the jet head. In the event that the water pressure is not high enough, the flow regulator increases the flow of water from the collection tank via the pump in order to return to sufficient pressure at the jet head to obtain the desired dome shape as explained previously.

[0038] In other embodiments, the pressure gauge may be placed, for example, at the inlet of the column.

[0039] In one embodiment of the invention, the device further comprises an additional emergency water supply in the event of sustained detection of pressure in the jet head below a predetermined threshold.

[0040] Here, "sustainable" means that this detection is typically effective for a period greater than a threshold.

[0041] For example, the pressure gauge measures the water pressure in the jet head. If the pressure is lower than the preset pressure and the water in the recovery tank is no longer sufficient to return to this pressure, then the additional water supply is controlled by the flow regulator until it reaches the threshold pressure level measured by the pressure gauge.

[0042] In one embodiment of the invention, the device further comprises a user input member for setting said predetermined threshold.

[0043] This allows the user to adjust the water pressure in the jet head to adapt the dome shape to their liking. The higher the pressure, the larger the dome.

[0044] In one embodiment of the invention, the flow regulator is configured to cut off the water supply to the nozzles cyclically, and cause a cyclically interrupted jet at the outlet of each nozzle.

[0045] Three main types of jets can be produced by the device: the continuous jet when the water flow is regular: the nozzles are then open continuously, the jet interrupted cyclically or in successive water segments: for example the flow regulator cuts the water supply every n periods in order to obtain a jet interrupted n times along its length; the nozzles then open and close depending on the water supply, the jet drips or "dotted": the water cut-off speed is greater than that for the interrupted jet.

[0046] In one embodiment of the invention, the device comprises, at each nozzle outlet of the jet head, at least one outwardly directed valve, linked to a hinge and returned by a spring.

[0047] The jet head nozzles have a multitude of flaps connected to the head by hinges placed on the outside of the flap and the head, allowing the flaps to open when water flows. The nozzle flaps are also attached to the head by a spring placed on the underside of each flap and attached to the jet head. In the event that the water pressure is insufficient, the flaps are closed, and the spring is then at rest. When the pressure becomes high enough to flow, the springs are stretched and the flaps open, allowing the water to flow.

[0048] Thus, in a “mechanical” embodiment based on spring valves as presented above, the flow regulator can be formed by the aforementioned valves, in cooperation with the water inlet, so that: A pressure above a threshold of water from the water inlet in the jet head causes the valves to open, and after the valves have opened, the release of water from the jet head generates a drop in water pressure in the jet head and causes the valves to close.

[0049] In one embodiment, it can be provided that the device further comprises an anemometer for: identifying a wind direction and force, increasing a flow of water through a first portion of the nozzles of the nozzle assembly, said first portion of the nozzles being located facing into the wind, and decreasing a flow of water through a second portion of the nozzles of the nozzle assembly, said second portion of the nozzles being complementary to the first portion, and located with its back to the wind.

[0050] It can further be provided that this anemometer can also be used to possibly cyclically interrupt the water jet depending on the wind force in successive water segments or drops. The anemometer can also be used to completely interrupt the jets, in the event of detection of a very high wind force. In this case, a simpler sensor than an anemometer (simply detecting the presence or a wind force) can also be used in a less sophisticated and possibly more economical embodiment. In such an embodiment, the device can thus comprise at least one sensor to identify a wind force and interrupt at least cyclically (or completely) the water jet depending on the wind force in successive water segments or drops.

[0051] In one embodiment, the jet head may comprise, for example in a lower surface (as illustrated in the figure 6 ), at least one lighting source 16b (for example a series of light-emitting diodes or the like) and a power supply 16a (for example a battery or a photovoltaic module or the like) of the lighting source 16b.

[0052] Other features, details and advantages will become apparent upon reading the detailed description below, and upon analyzing the attached drawings, in which: Fig. 1 [ Fig. 1 ] represents a water jet device. Fig. 2a [ Fig. 2a ] represents the water jet head of the device. Fig. 2b [ Fig. 2b ] represents the angle of inclination of the nozzles of the water jet head. Fig. 2c [ Fig. 2c ] represents the water jet head in a second possible form. Fig. 2d [ Fig. 2d ] represents the water jet head with a plurality of rows of nozzles arranged in respective parallel planes in order to impart a desired thickness to the dome formed by the water jets. Fig. 3 [ Fig. 3 ] represents a water jet device with a plurality of columns. Fig. 4a [ Fig. 4a ] represents a nozzle of the water jet head. Fig. 4b [ Fig. 4b ] represents a horizontal section of the nozzle in one operating mode. Fig. 4c [ Fig. 4c ] represents a horizontal section of the nozzle in a second mode of operation. Fig. 5 [ Fig. 5 ] represents a section of a water collection tank. Fig. 6 [ Fig. 6 ] represents a water jet device in one embodiment. Fig. 7 [ Fig. 7 ] illustrates a device of the prior art. Fig. 8 [ Fig. 8 ] illustrates one way of using the device. Fig. 9a [ Fig. 9a ] represents the jet direction for using the jet head of the figure 2a . Fig. 9b [ Fig. 9b ] represents the jet direction for using the jet head of the figure 2b . Fig. 10 [ Fig. 10 ] illustrates an embodiment of a dome with a rectangular-oval base according to a possible embodiment.

[0053] There figure 1 represents a water jet device. This device comprises: a jet head 1, a water supply column 2, a flow regulator 3, a water inlet 13, a holding base 4, and an HMI interface for entering the setpoint to choose the flow rate to be regulated.

[0054] In particular, the column 2 comprises an outlet pipe force-fitted, for example, into an opening in the jet head 1. The other end of the column 2 is connected to the water inlet 13 via the flow regulator 3. The head 1 and column 2 assembly is mechanically held by the holding base 4. In the example of the figure 1 , the base 4 is in the form of a hollow circular hoop and has an opening into which the water inlet pipe of the column 2 is force-fitted, for example.

[0055] In operation, the jet head 1 (comprising jet nozzles on its periphery as described in detail below) generates a dome of water into which the column 2 (which may be transparent or translucent) merges. In the example illustrated, the impact of the water from the dome on the ground forms a circle of variable radius depending on the pressure at the jet head 1 (or equivalently on the flow rate chosen for the regulator). Thus, a user can choose, for example, the pressure and / or the flow rate via the HMI interface (for example a remote control or an input interface connected to the flow regulator 3), and, from there, the radius on the ground of the impact of the dome.

[0056] Such an achievement typically allows the diameter of the water dome formed to be adjusted, depending on the needs of the decorative material (table, chairs, armchairs, or others) to be installed under the dome.

[0057] The flow regulator, column, base and jet head assembly can be a kit to be installed on a water inlet 13 (garden tap or other).

[0058] In the example shown, the device is placed on a flat surface. The jet head 1 is held in height by the parabolic column 2 (like the water jets from the nozzles of the head 1 to merge with them). The head 1 is supplied by the water inlet 13, the flow rate of which is controlled by the water flow regulator 3. The jet head 1 is positioned above the center of the holding base 4, the device resting on the holding base 4.

[0059] The water from the water inlet 13 is regulated by the flow regulator 3 then passes through the column 2 to arrive in the jet head 1 and flows so as to form the water dome with the multitude of jets coming from the jet head 1. The position of the jet head 1 by means of water outlet nozzles makes it possible to have a water dome shape.

[0060] The flow regulator 3 regulates the water supply to the jet head in order to obtain parabolic-shaped jets. To this end, the flow rate is greater than a first threshold for rapid ejection of the water, then taking a parabolic shape by gravity as illustrated in the figures 9a et 9b The flow rate must be greater than a second threshold so that the water does not water the equipment installed under the dome, and more generally so that this dome retains its shape.

[0061] In this regard, the jet pipes of head 1 are arranged on the periphery of the head as illustrated in the figure 1 , which head 1 can be: circular, in which case the dome may be cupola-shaped with a circular footprint on the ground, elliptical, in which case the dome may be flattened cupola-shaped with an oval footprint on the ground, square or rectangular, with a square or rectangular base dome shape on the ground, polygonal, in which case the dome may be cupola-shaped with a polygonal footprint on the ground.

[0062] The jet head 1 comprises a multitude of nozzles 5 equidistant from each other, placed on the circumference of the jet head 1 in the same horizontal plane. The column 2 is connected to the jet head 1 allowing the water to be conveyed to the outlet nozzles 5. The water outlet nozzles 5 are oriented at an angle α necessarily less than 90 degrees (as illustrated figure 2b ) in order to obtain the parabolic jet shape.

[0063] There figure 2a represents a jet head 1 of a circular water jet device connected to the column 2. The shape of the jet head may vary according to the embodiments. For example, it may take a cylindrical shape as illustrated in the figure 2a so that each opening is in a vertical plane. In this case the jet J is parabolic as illustrated in the figure 9a , with a dome radius thus formed xa, such that xa = vo (2h / g) 1 / 2< where: vo is the water ejection velocity from the nozzles, h is the head height 1 above the ground, g is gravity (9.8 m / s 2< ).

[0064] Alternatively, the head may take a conical shape as shown figure 2c , with the vertex S of the cone oriented upwards, the angle of the cone being noted α. Such an embodiment makes it possible to project further (at the distance xb as illustrated on the figure 9b ) the water from the nozzles, especially when α is close to 45°.

[0065] Preferably, to effectively conceal the water column in the set of jets, it can be chosen, as illustrated in the figure 2d , to create a water jet having a certain thickness greater than a threshold. Thus, a water jet head is provided comprising a plurality of rows of nozzles arranged in respective parallel planes in order to give this desired thickness to the dome formed by the water jets.

[0066] There figure 3 represents a water jet device with a multitude of columns 2, all having homologous parabolic shapes merging with the dome of water jets from the nozzles 5. This embodiment of the device can be used for a jet head height greater than a maximum height to be supported by a single water inlet column 2. The device comprises a jet head 1 connected to the multitude of water inlet columns 2, a water inlet 13 regulated by a flow regulator 3 and a holding base 4. The columns 2 are spaced at an equal angle for all the columns around the jet head.

[0067] There figure 4a represents a water outlet nozzle 5 from the jet head 1. The nozzle 5 comprises a multitude of valves 7 connected to the jet head by means of a hinge 6 positioned on the outer face of the valves, the hinge 6 allowing the valve 7 to swing when the water leaves the nozzle 5.

[0068] There figure 4b represents a horizontal section of a nozzle 5 in one mode of operation, the valve 7 being supported from the inside by a spring 8. The spring 8 is placed on the inner face of the valve 7 and is connected to the jet head 1.

[0069] In the realization or the water supply is not activated (as illustrated figure 4b ), for example, the nozzles 5 are in the closed position. The valves 7 are folded down, the springs 8 are relatively relaxed (compared to an alternative position where they are more tense), not allowing water to flow through the nozzles 5.

[0070] In the embodiment where the water supply is activated (as illustrated in the figure 4c ), the pressure in the head 1 increases, pushing on the valves 7 until the latter 7 move into the open position. The springs 8 are tensioned by the pressure of the water inlet in the jet head of the device, so that when the pressure becomes lower than a threshold, the return of the springs causes the valves to close again. In steady state, the valves can open and close cyclically. Thus, the jets can be interrupted cyclically, forming interspersed segments of water. Such an embodiment by segmented jets makes it possible to limit the disturbance of the dome shape by an occasional gust of wind, outdoors. Furthermore, it is possible to use an anemometer 15 (as illustrated on the top of the jet head as an example on the figures 6 And 10) to identify a wind direction and increase the flow rate of certain nozzles facing the wind and decrease that of nozzles facing back to the wind. In this regard, the flaps forming the nozzles, illustrated on the figures 4a , 4b, 4c , can be replaced by electronic nozzles controlled by the anemometer 15 and capable of producing the different possible jets (continuous, segmented, or in droplets).

[0071] There figure 5 represents a water recovery tank 9 here comprising holes 10 in order to recover the water flowing through the jet head and a water reservoir 11, underlying the compartment with holes 10, and recovering the water flowing through the holes 10.

[0072] There figure 6 represents a water jet device in one embodiment comprising, in addition to the jet head 1, the water inlet column 2 and the flow regulator 3: a pressure gauge 12 allowing measurement of the water pressure (preferably in the jet head or alternatively at the foot of the column), a water recovery tank 9 (to avoid wasting the water from the nozzles), a pump 14, to reinject the water from the tank 9, an anemometer 15, to define the shape of the water jets leaving the nozzles according to the force of the outside wind.

[0073] However, in this embodiment, the water inlet 13 can continue to be used as a backup in the event that the loss of water outside the tank 9 no longer allows sufficient pressure to be maintained at the jet head 1.

[0074] Thus, in the example shown, the pressure gauge 12 measures the water pressure and makes it possible to activate the flow regulator 3 connected to the water inlet 13 if the quantity of water in the recovery tank 9 is not sufficient to supply the device on its own. The pressure gauge 12 can also measure the water pressure in order to activate the pump 14 in the case where the pressure is lower than the aforementioned pressure threshold to obtain a dome effect.

[0075] Furthermore, as illustrated in the figure 6 , the jet head may comprise on its lower face a lighting source 16b such as for example a bar of light-emitting diodes (or others) and a power supply 16a (typically from a photovoltaic module in an outdoor use of the device) of the lighting source 16b. Moreover, the power supply 16b may also power the anemometer 15 illustrated in the figure 6 .

[0076] Thanks to such arrangements, and in particular by creating a dome shape in which the jets all have parabolic trajectories, with water supply columns of the same shape to merge into the dome, such a dome shape makes it possible to define a space for welcoming users without the constraint of a central column preventing any furniture from being placed under the dome. As illustrated in the realization of the figure 8 , you can thus place any table in the center of the dome (and not necessarily open in its center), without disrupting the conviviality between users.

Claims

1. Water jet device for recreational purposes, in particular of the fountain type, comprising: - a jet head (1) equipped with at least one water infeed opening and at least one set of water outlet nozzles (5), the nozzles (5) of said set being arranged in a same plane and on a peripheral line of the jet head (1), the nozzles (5) having respective outlets oriented towards the outside of the jet head, - a water flow regulator (3) supplying the nozzles (5) in order to produce, during use, a water velocity defining a water jet (J), exiting each nozzle (5), having a path of chosen substantially parabolic shape, the set of water jets (J) exiting the nozzles (5) forming at least a dome portion during use, and - at least one water supply column (2), made of a rigid material and comprising an inlet connected to a water infeed (13) and a water outlet connected to the opening of the jet head (1) and mechanically integral thereto, said supply column having said parabolic shape chosen to blend in with the dome portion during use, and characterized in that the opening of the jet head (1), intended to receive said at least one water supply column (2), is at the same angular distance from the water outlet nozzles (5) located to either side thereof and in the same plane as the water outlet nozzles (5).

2. Device according to claim 1, characterized in that the nozzles (5) of said set are arranged on at least one circular arc in a same plane, the nozzles (5) comprising respective outlets oriented towards the outside of a cylinder portion or of a cone portion having its apex located above the jet head (1), and having a central axis perpendicular to said same plane, the dome portion formed by the set of water jets (J) exiting the nozzles (5) having the shape of a cupola portion.

3. Device according to one of claims 1 and 2, characterized in that the rigid material is translucent.

4. Device according to one of the preceding claims, characterized in that it further comprises a support base (4), mechanically integral to the inlet of the column (2).

5. Device according to one of the preceding claims, characterized in that the jet head (1) is of a generally elliptical, circular, or polygonal shape, and comprises a plurality of openings (5) distributed at regular distances over said general shape, and in that the device comprises a plurality of water supply columns (2) made of a rigid material and each comprising an inlet connected to a water infeed (13) and a water outlet connected to an opening in the jet head (1) and mechanically integral thereto, said supply columns (2) each having said chosen parabolic shape.

6. Device according to claim 5, in combination with claim 4, characterized in that each of the column (2) inlets is mechanically integral to the support base (4), and, the support base (4) being of the same general shape as the jet head (2), the column (2) inlets are distributed at regular distances over said general shape of the support base (4).

7. Device according to one of claims 4 and 6, characterized in that the support base (4) comprises at least one water collection tank (9), forming said water infeed (13), and the device comprises a water pump (14) for the collection tank (9), connected to the flow regulator (3).

8. Device according to one of the preceding claims, characterized in that it further comprises a pressure gauge (12) cooperating with the flow regulator (3) to measure a pressure in the jet head (1), the flow regulator (3) being arranged to increase the flow rate of water from said water infeed (13), in the event that a pressure below a predetermined threshold is detected in the jet head (1).

9. Device according to claim 8, in combination with claim 7, characterized in that it further comprises an additional water supply, as backup in the event of a sustained detection of pressure below a predetermined threshold in the jet head (1).

10. Device according to one of claims 8 and 9, characterized in that it further comprises an input member enabling a user to set said predetermined threshold.

11. Device according to one of the preceding claims, characterized in that the flow regulator (3) is configured to cut off the water supply to the nozzles (5) cyclically, and to cause a cyclically interrupted jet to exit each nozzle (5).

12. Device according to one of the preceding claims, characterized in that it comprises, at each nozzle (5) outlet of the jet head (1), at least one outwardly opening valve (7), linked to a hinge (6) and urged inward by a spring (8).

13. Device according to claim 12, in combination with claim 11, characterized in that the flow regulator (3) is formed by said valves (7), in cooperation with the water infeed (13), and in that: a pressure greater than a threshold, for the water coming from the water infeed (13) into the jet head (1) causes the valves (7) to open, and after the valves (7) open, the release of water from the jet head (1) generates a drop in water pressure in the jet head (1) and causes the valves (7) to close.

14. Device according to one of the preceding claims, characterized in that it comprises an anemometer (15) for: identifying a wind direction and force, increasing a flow rate of water through a first portion of nozzles (5) among the set of nozzles (5), said first portion of nozzles (5) being located facing the wind, and decreasing a flow rate of water through a second portion of nozzles (5) among the set of nozzles (5), said second portion of nozzles (5) being complementary to the first portion and located facing away from the wind.

15. Device according to one of the preceding claims, characterized in that it comprises at least one sensor for identifying a wind force and at least cyclically interrupting the water jet, depending on the wind force, into successive segments or drops of water.

16. Device according to one of the preceding claims, characterized in that the jet head (1) comprises, in a lower surface, at least one light source (16b) and a power supply (16a) for the light source (16b).