Valve and inflatable sports equipment with a valve

Abstract

Valve for an inflatable sports equipment, with a valve insert (4) which is designed in the manner of a check valve and has a valve body (24) which is pretensioned into a closed position against a valve seat (26) formed on a valve bushing (28) of the valve insert (4) and which can be brought into an open position for filling or emptying and then back into a closed position, in which a pin (30) which is in operative connection with the valve body (24) is actuated and wherein a bayonet (36) for attaching a pump is formed on the valve insert (4), wherein an opening stroke for effecting an adjustment of the valve body (24) in the direction of its open position is greater than a stroke for effecting an adjustment of the valve body (24) into its closed or non-return position, wherein the pin (30) is operatively connected to the valve body (24) via a mechanism designed according to the ballpoint pen principle, and wherein inclined ramps (60, 62) are formed on the pin (30) alternately effecting an opening stroke and a closing stroke, wherein the axial length of the ramps (62) effecting the opening stroke is smaller than the axial length of the ramps (60) effecting the closing stroke.

Description

[0001] The invention relates to a valve for an inflatable sports device according to the preamble of patent claim 1 and to a sports device provided with such a valve.

[0002] Tube kites typically have a leading-edge tube, from which struts extend to a leading edge. These struts, together with the curved tube, form the kite's canopy. The struts and the tube are filled with air, with inflation and deflation controlled by suitable valves. In modern designs, the tube and struts are constructed of two layers: a highly durable outer skin and an inner bladder. The bladder is made of a comparatively soft, airtight material protected by the robust outer skin.

[0003] To fill or empty the kite, the bladder is equipped with at least one valve that passes through the outer skin and is closed after inflation.

[0004] Such valves are also used on inflatable SUPs or inflatable rigs.

[0005] Kites, in particular, often use valves that have a similar design to the check valves found on air mattresses. One embodiment of such a valve for inflating a kite is disclosed, for example, in the applicant's DE 20 2010 007 196 U1.

[0006] The disadvantage of such solutions is that the valves have a comparatively small diameter, requiring an adapter to connect a pump commonly used to inflate kites. An even more serious disadvantage is that the opening cross-section of such "air mattress valves" is small, resulting in considerable pressure loss and thus the effort required to inflate.

[0007] In the field of inflatable SUPs and also in kite applications in recent years, valves with a significantly larger valve cross-section have become established in order to simplify inflation.

[0008] A valve with an enlarged diameter is disclosed, for example, in DE 20 2011 050 429 U1. This document shows a valve designed with an adapter that adapts the actual filler neck diameter of the valve to the diameter of the pump pressure connection, more precisely, the diameter of the pump's hose bayonet. The valve is designed with an insert that is adjustable for filling and emptying, to seal the valve or to open a large opening cross-section.

[0009] Furthermore, DE 72 16 654 U, US 2007 / 0 074 760 A1, and DE 20 2007 000 758 U1 each disclose a valve that can be locked in an open position and has a valve body that is operatively connected to a pin. By actuating the pin against a return spring, the valve is opened and can be locked in an open position by rotating the pin when a predetermined opening stroke is reached.

[0010] Furthermore, DE 82 23 327 U1 discloses a valve with an adjustable valve body operatively connected to a pin that is preloaded in its closed position by arm-shaped return elements designed as leaf springs. Upon actuation of the pin, the leaf springs snap over at a certain point, forcing the valve body into its open position.

[0011] Furthermore, DE 20 2005 008 935 U1 discloses a self-locking valve which is constructed from a hinged plug, a valve housing, an inner push rod, a coil, a film sleeve, a valve plug and a securing element, wherein when an extension hose is attached and snapped into place, the valve plug releases an opening in the valve.

[0012] In the kites marketed by the applicant on the filing date of this application, this adjustment is achieved by twisting the insert. This twisting can be done manually or by attaching the pump hose. However, care must be taken to return the insert to its closed position after inflation to prevent unwanted deflation of the bladder when removing the pump. For additional sealing, the valve in this system is sealed with a valve cap.

[0013] For SUPs, valves have become popular where the valve body is manually moved into an open position for emptying. However, when filling, care must be taken to ensure that the valve disc is moved back again so that the check valve function is activated. In some designs, this adjustment is achieved by twisting and axially displacing the pin. Other systems use a push-push system that works according to the ballpoint pen principle. During one stroke, an adjustment occurs, for example, in the opening direction, and during the next stroke, the valve body is reset so that it only functions in its check function.

[0014] Since the inflation pressure for SUPs is significantly higher than that for kites, different pumps are used for SUPs, which usually have a larger pump connection than those of kite pumps, so the respective connections are not compatible.

[0015] All of these systems share the common problem of ensuring that the valve is in its closed position after filling, thus ensuring a reliable seal. With the known systems, this can only be achieved through proper handling and checking the position of the valve body.

[0016] In contrast, the invention is based on the object of creating a valve or an inflatable sports device equipped with such a valve and a suitable pump in which the risk of incorrect operation is reduced.

[0017] This object is achieved by a valve having the features of patent claim 1 or by a sports device according to patent claim 10.

[0018] Advantageous further developments of the invention are the subject of the subclaims.

[0019] The valve according to the invention is suitable for an inflatable sports device, for example a kite, a SUP, an inflatable rig, or the like. The valve has a valve insert designed like a check valve. This valve insert is constructed with a valve body that is preloaded into a closed position against a valve seat formed on a valve bushing and can be brought into an open position for filling or emptying and then back into the closed position again by actuating a pin operatively connected to the valve body in the axial direction. The valve insert is further constructed with a bayonet for attaching a pump. The term "bayonet" refers to any coupling piece that enables a pump or pump hose to be detachably attached to the valve insert.

[0020] According to the invention, the opening stroke for effecting adjustment of the valve body toward its opening position is designed to be greater than the stroke for effecting adjustment of the valve body in the closing direction. Thus, accidental opening of the valve body is only possible by actively moving through the larger stroke. This design is particularly advantageous when, for example, when applying a pump, the valve body is actively actuated only with the smaller stroke, so that only adjustment or release / reset in the closing direction occurs. The adjustment to the opening position must be specifically achieved using the larger stroke.

[0021] The valve is designed according to the ballpoint pen principle and thus, by attaching the pump, it is ensured that the valve is always returned to its closed position after the pump is removed.

[0022] The pin is operatively connected to the valve body via a mechanism designed according to the ballpoint pen principle. Alternating, inclined ramps are formed on the pin or an element operatively connected to it. These ramps create an opening stroke and a closing stroke, respectively. They interact with corresponding wedge surfaces of a rotatably mounted feed bushing to adjust it in the axial direction and thereby cause a rotation through an angular range that roughly corresponds to the pitch of the ramps. The axial length of the ramp causing the opening stroke is smaller than the axial length of the ramp causing the closing stroke, so that a larger stroke is required for adjustment to the open position in order to bring the ramp into operative engagement with the corresponding wedge surface.

[0023] Stops are formed on the thrust bushing to limit the axial movement of the valve body, so that, depending on the relative positioning of the ramps and the wedge surfaces, the valve body either assumes its open position or rests on the valve seat. The ballpoint pen principle is sufficiently described in the literature, so further functional explanations with reference to these explanations are unnecessary.

[0024] The wedge surfaces are then designed with the same axial length. In kinematic converse, the wedge surfaces could also be designed with different axial lengths, and the axial length of the ramps could then be the same for all segments.

[0025] Especially with kites, it is preferred if the valve device is, for its protection, at least partially inserted into a bush-shaped housing part that is connected to the bladder.

[0026] In such a variant, the valve has an adapter ring that can be attached to the outer skin of the sports equipment and connected to a flange of the housing part, into which the valve insert is screwed from the outside. The adapter ring and the housing part, or rather the flange of the housing part, are connected to each other in a form-fitting manner in the direction of rotation. This form-fitting connection between the inner housing part, which accommodates the valve insert, and the outer adapter ring reliably prevents deformation / twisting of the outer skin and, in particular, the bladder during connection, thus preventing damage.

[0027] This positive connection can be achieved by forming projections on the adapter ring or on the flange of the housing part, which, when assembled, engage in corresponding recesses in the other component.

[0028] These projections / recesses are preferably designed in such a way that mounting is only possible in a single predetermined position.

[0029] The assembly precision and thus the sealing of the valve is further improved if the adapter ring and the valve insert are centered relative to each other by means of a centering device.

[0030] This centering can be achieved, for example, by forming a centering ring on the adapter ring or on the housing part, which, when mounted, engages in a corresponding centering recess of the other component.

[0031] The effective length of the pin of the valve body is preferably designed such that when a pump is applied, it comes into contact with a pump-side actuating element in order to effect an adjustment of the valve body in an opening or closing direction, whereby this adjustment stroke is, however, not sufficient to bring the valve body into the permanent open position.

[0032] The valve body can have a valve disk that is encompassed by the housing part, so that a flow cross-section is defined by the outer circumference of the valve disk and the inner circumference of the housing part. Supporting webs can be formed on an inner circumferential wall of the housing part. These support webs extend radially toward the valve disk, with a portion of the opening cross-section then being formed between each of them. These pointed webs prevent radial deflection of the valve disk, for example, in the event of an uncontrolled crash of the kite, and thus prevent damage to the valve.

[0033] In an advantageous development of the invention, a frontal sealing surface for a pump-side coupling piece is formed on the valve insert. This means that in this variant, sealing is achieved, on the one hand, by attaching the pump hose to the bayonet and, on the other hand, by the frontal contact of the coupling piece of the pump hose with the aforementioned sealing surface. This makes it possible to attach pumps with different bayonet couplings where tightness in the bayonet area is not guaranteed, but where reliable sealing is achieved through the additional sealing surface.

[0034] As explained at the beginning, the valve according to the invention is preferably used in an inflatable sports device, for example a kite, a SUP, an inflatable boat or an inflatable rig.

[0035] A pump for such a valve has, on the one hand, a coupling piece that can be engaged with the bayonet on the sports equipment side. A front seal is formed on the coupling piece, the seal being positioned so that it can be brought into sealing contact with the sealing surface of the valve insert. The coupling piece also has an actuating element, for example, a diagonal bar for actuating the pin when the coupling piece is attached to the bayonet. This actuation, in turn, occurs with a stroke that corresponds to the shorter closing stroke, so that a permanent adjustment to the open position is not possible.

[0036] This means that the shorter stroke is selected so that the valve body retains its non-return function and is held open only against the preload. The longer opening stroke moves the valve body into a locked open position.

[0037] Preferred embodiments of the invention are explained in more detail below with reference to schematic drawings. They show: Fig. 1 a further development of a conventional valve in an intermediate assembly step; Fig. 2 the valve Fig. 1 in assembled condition; Fig. 3 a valve according to the invention in assembled state; Fig. 4 an exploded view of the valve from Fig. 3; Fig. 5, Fig. 6 representations of the valve according to Fig. 3 in disassembled condition; Fig. 7 a valve body of the valve according to the Fig. 3 to 6; Fig. 8 a housing part of the valve according to the Fig. 3 to 6 and Fig. 9 a front view of a pump-side coupling piece.

[0038] Based on the Fig. 1 and Fig. 2, a variant of a conventional kite valve is first described. As explained, such a valve 1 has an insert 2, which is rotatably mounted in a valve insert 4 and via which a valve body (not shown), in the following case a valve disc of a check valve, can be moved from a closed position to an open position, so that the kite can be emptied. The valve insert 4 is attached directly or via a housing part to a bladder of the kite and passes through an adapter ring 6 attached to the outer skin (canopy) 8. A closure cap 12 is attached to this adapter ring 6 via a molded-on hinge strip 10. In the pre-assembled state according to Fig. 1, the valve insert 4 projects out of the adapter ring 6 with a threaded section 14. On this threaded section 14, the Fig. 1, the fixing ring 16 shown on the right is screwed on to center the valve insert 4 with respect to the adapter ring 1. For this centering, a centering ring 18 is formed on the adapter ring 6, which encompasses the threaded section 14 and projects in the axial direction. The fixing ring 16 has, as shown in Fig. 1 on its adapter ring side large surface a centering recess 20 adapted to the geometry of the fixing ring 18, which according to Fig. 2 when screwing on the fixing ring 16, the centering ring 18 engages in a form-fitting manner, so that the threaded engagement between the fixing ring 16 and the valve insert 4 ensures exact positioning of the valve insert 4 with respect to the adapter ring 6.

[0039] The applicant reserves the right to make its own claim to this further development of conventional valves.

[0040] Also visible in Fig. 1 is a recess 22 into which a Fig. 1 and Fig. 2, a housing part of the valve 1 (not shown) or the valve insert 4 is immersed with a projection to prevent relative rotation of the housing part / valve insert and adapter ring 6. This further development will be discussed in more detail below.

[0041] Fig. 3 shows a valve 1 according to the invention in the assembled state, wherein an actuating part of the valve 1 protrudes outwards from the canopy 8.

[0042] Valve 1 consists of Fig. 4 basically consists of four main components.

[0043] The valve insert 4 has a valve body 24 designed as a valve plate, which Fig. 4 is shown in the open position and can be brought into sealing contact with a valve seat 26 on a valve bushing 28. The valve body 24 is actuated via a pin 30, which is adjustably guided in the valve bushing 28. The valve bushing 28 of the valve insert 4 is radially expanded to form a sealing flange 32, on which a circumferential sealing surface 34 for a pump-side coupling piece is formed. This coupling piece, explained in more detail below, is inserted into a bayonet 36 of the valve insert 4.

[0044] To close the valve 1, according to Fig. 4 a closure cap 38 can be used. This has a coupling piece 40, on which bayonet links 42 are formed, into which the corresponding bayonet cams 80 (see Fig. 3) of the bayonet 36, so that the closure cap 38 can be reliably and sealingly connected to the valve insert 4 by twisting. To improve this seal, a seal can be formed on a cover 44 of the closure cap 38, which seal comes into contact with the sealing surface 34. In the illustrated embodiment, such a circumferential sealing surface is not provided, since the cover 44 is merely toggle-shaped.

[0045] The adapter ring 6 is sewn to the canopy 8 and encompasses a corresponding opening in this canopy, allowing access to the bladder. As explained, the circumferential centering ring 18 is formed on the adapter ring 6. Furthermore, three approximately rectangular recesses 22a, 22b, 22c are formed on the centering ring 18. These recesses 22a, b, c are irregularly spaced on a common pitch circle. In the specific embodiment, for example, two recesses 22a, 22b are arranged relatively close to one another, while the third recess 22c is arranged diametrically opposite one another.

[0046] On the bladder side, the aforementioned housing part 46 is provided, which, with a housing sleeve 48, penetrates a recess in the bladder and extends into its interior. A flange 50 is provided on the adapter ring-side end section of the housing sleeve 48, on which three projections 52a, 52b, 52c are formed. Their geometry and position are selected to correspond to those of the recesses 22a, 22b, 22c, so that during assembly, the three projections 52a, 52b, 52c fit precisely into the corresponding recesses 22a, 22b, 22c. In this way, relative rotation of the adapter ring 6 and the housing part 46, and thus of the canopy and the bladder, is reliably prevented, so that damage to the material during assembly or improper handling is virtually impossible.

[0047] An internal thread 54 is provided on the inner peripheral wall of the housing sleeve 48, which meshes with an external thread 56 of the valve bushing 28. In the assembled state, the valve body 24 is immersed in the housing sleeve 48 and, with its outer circumference and the adjacent inner circumference of the housing sleeve 48, limits the flow cross-section of the valve.

[0048] To improve the flow when inflating and deflating the kite, Fig. 4 wave-shaped recesses or projections 57 are provided on the lower end face of the housing sleeve 48.

[0049] Fig. 5 shows a pre-assembly state with the adapter ring 6 sewn to the canopy 8, the valve insert 4 and the housing part 46, which in the illustration according to Fig. 5 is not yet connected to the bladder. The three in Fig. 4 visible projections 52a, 52b, 52c are located on the Fig. 5 below, not visible side of the flange 50. In this illustration, the wave-shaped projections 57, which optimize the flow cross-section, can also be clearly seen. Fig. 5, the pin 30 connected to the valve body 24 is preloaded by a spring 58 toward the closed position, in which the valve body 24 rests sealingly on the seat 26. Also visible in this illustration is the bayonet 36, into which the pump coupling piece is inserted.

[0050] In the representation according to Fig. 6, the valve insert 4 is visible from the side. Accordingly, the valve body 24 is lifted from the valve seat 26 on the valve bushing 28 and thus locked in the open position. Also clearly visible in this view is the sealing flange 32, which is radially extended relative to the valve bushing 28, with its centering recess 20 on the adapter ring side, into which the adapter ring is inserted during assembly ( Fig. 3) the centering ring 18 is inserted. This means that in this embodiment the fixing ring 16 is, so to speak, in accordance with the Fig. 1 and Fig. 2 is integrated into the valve insert 2, more precisely into the sealing flange 32.

[0051] Fig. Figure 7 shows the valve body construction in detail. As explained at the beginning, the valve insert is designed in a conventional manner as a push-push system, whereby when the pin 30 is actuated in the direction of the arrow the valve body 24 can be brought into an open position, for example. When the pin 30 is actuated again in the direction of the arrow the valve body 24 is then brought back into its closed position, in which it fulfills a non-return function. This means that when pressure builds up from the outside the valve body 24 can then be opened by the pressure acting in the opening direction. This occurs, for example, when the pump is attached and actuated. When the pump is removed the valve body 24 then snaps back into its closed position automatically in the non-return function due to the force of the spring.

[0052] The push-push system or ballpoint pen principle is known, so that only the elements essential for understanding the invention will be explained here. For adjustment, a plurality of ramps are formed on the pin 30, in the present case specifically four ramps, of which only two are provided with the reference numerals 60, 62. These ramps each have an inclined surface 64 or 66, which can be brought into contact with corresponding wedge surfaces of a rotatably mounted feed bushing (not shown), so that by contact of the inclined surfaces 64, 66 with the corresponding wedge surfaces, the feed bushing can be moved in the axial direction (arrow in Fig. 7) is shifted and rotated by one division step.

[0053] On the valve body side, a correspondingly designed link 68 is formed, which determines the relative position of the valve body 24 with respect to the valve seat 26 depending on the rotational position of the feed bushing. This means that in one rotational position of the feed bushing, the valve body 24 rests on the valve seat 26 and can only lift off the valve seat 26 in the check function. In the next rotational position of the feed bushing, the valve body 24 is then lifted off the valve seat 26 and remains in its open position.

[0054] In simple terms, by actuating the pin 30, the valve body 24 is alternately opened or moved into its non-return position (resting on the valve seat 26). In this respect, the valve body design is no different from that of conventional solutions, such as those used in SUPs.

[0055] However, a significant difference between the solution according to the invention and conventional solutions is that, according to the invention, the ramps 60 that effect movement toward the opening position have a shorter axial length than the adjacent ramps 62 responsible for the return adjustment. Due to these different axial lengths, a greater stroke is required to fully open the valve body 24 than is required to return (close) the valve body 24.

[0056] To improve the sealing, an annular seal 72 is arranged on the outer circumference of the valve body 24.

[0057] Fig. 8 shows a detailed view of the housing part 46 with its flange 50 and the housing sleeve 48 which extends into the interior of the bladder and whose mouth area, as explained above, is formed with the wave-shaped projections 56. In this area, i.e. in the area in which the valve body 24 is arranged after assembly, a plurality of spaced-apart support webs 70 are formed on the inner circumferential surface of the housing sleeve 48, which support webs 70 surround the valve body 24 in the assembled state with a comparatively small radial distance. The opening cross-section of the valve 1 is then correspondingly limited by the outer circumference of the valve body 24 and the inner circumference of the housing sleeve 48, wherein this annular gap is divided by the plurality of support webs 70 into a plurality of cross-sectional sections through which the air flows in the direction of the arrow into the interior of the bladder during filling.The lateral support of the valve body 27 via the support webs 70 reliably prevents damage to the valve 1 in the event of a fall and the associated radial overload of the valve body 24.

[0058] The applicant also reserves the right to make its own claim regarding the formation of support webs on a housing part or a valve insert.

[0059] A problem with conventional valves is that the geometry of the bayonet 36 is not standardized, so that a tight seal cannot be guaranteed for different pump manufacturers. In addition, different bayonet geometries are usually used for SUP pumps than for kite pumps, so that the systems are not compatible. This disadvantage is eliminated according to the invention by the fact that the seal is not placed solely in the area of ​​the bayonet, as in conventional systems, but that on the pump-side coupling piece 74, in addition to the bayonet guides 42 (see Fig. 4 and Fig.9) also features a sealing shoulder 76 on the end face, which can be brought into sealing contact with the sealing surface 32 of the valve insert 4 when the coupling piece 74 is attached, thus ensuring reliable sealing even if the bayonet coupling does not fit exactly. The sealing shoulder 76 can be provided with a seal, for example a sealing ring or the like. This means that the valve is designed to fit both SUP and kite-designed pump adapters (pump bayonets), allowing the use of virtually any pump type suitable for kites or SUPs without changing the adapter.

[0060] Furthermore, the coupling piece 74 is formed with a diagonal web 78, the axial position of which is selected such that, when the coupling piece 74 is attached to the bayonet 36, the pin 30 is actuated with a stroke corresponding to the shorter closing stroke, in which only the longer ramp 60 comes into active engagement with the corresponding wedge surfaces. This means that the pin 30 cannot be adjusted to its previously described opening position by attaching the pump; this can only be achieved by active adjustment by hand or the like.

[0061] When using a kite equipped with a valve according to the invention, it is deflated by actively adjusting pin 30 to this open position - the valve remains open. When the kite is subsequently inflated, the coupling piece 74 of the pump is then attached and pin 30, which is pretensioned into a constant basic position by spring 58, is actuated with the smaller stroke, so that the closing body 27 is moved into its non-return position. Accidental complete opening of the valve body 24 is not possible by attaching the coupling piece 74, even if the valve is already adjusted to its non-return position before inflation. The appropriate design of the pump-side coupling piece 74 thus reliably prevents incorrect operation. Furthermore, optimal sealing is ensured by the double seal via the sealing shoulder 76 and the actual bayonet coupling.

[0062] Disclosed are a valve for an inflatable sports device, an inflatable sports device provided with such a valve and a suitable pump, which are designed such that a stroke required to permanently open the valve is greater than a stroke for adjusting the valve to its closing / return position.

Claims

[1] Valve for an inflatable sports equipment, with a valve insert (4) which is designed in the manner of a check valve and has a valve body (24) which is prestressed into a closed position against a valve seat (26) formed on a valve bushing (28) of the valve insert (4) and which can be brought into an open position for filling or emptying and then back into a closed position, in which a pin (30) which is in operative connection with the valve body (24) is actuated and wherein a bayonet (36) for attaching a pump is formed on the valve insert (4), wherein an opening stroke for effecting an adjustment of the valve body (24) in the direction of its open position is greater than a stroke for effecting an adjustment of the valve body (24) in its closed or return position, wherein the pin (30) is operatively connected to the valve body (24) via a mechanism designed according to the ballpoint pen principle, and wherein inclined ramps (60, 62) are formed on the pin (30) alternately effecting an opening stroke and a closing stroke, wherein the axial length of the ramps (62) effecting the opening stroke is smaller than the axial length of the ramps (60) effecting the closing stroke. [2] Valve according to claim 1, wherein the valve insert (4) is inserted at least in sections into a bush-shaped housing part (46). [3] Valve according to one of the preceding claims, with an adapter ring (6) which can be fixed to an outer skin of the sports equipment and which can be connected to a flange (50) of the housing part (46) by screwing the valve insert (4) to the housing part (46), wherein the adapter ring (6) and the flange (50) of the housing part (46) are positively connected to one another in the direction of rotation. [4] Valve according to claim 3, wherein projections (52) are formed on the adapter ring (6) or on the flange (50) which, in the assembled state, dip into corresponding recesses (22) of the flange (50) or the adapter ring (6). [5] Valve according to one of claims 3 or 4, wherein the adapter ring (6) and the housing part (46) are centered relative to each other by means of a centering device. [6] Valve according to claim 5, wherein on the adapter ring (6) or on the housing part (46) a centering ring (18) is formed which, in the assembled state, engages in a centering recess (20) on the housing part (46) or on the adapter ring (6). [7] Valve according to one of the preceding claims, wherein the pin (30) is designed such that when the pump is applied it can be brought into contact with a pump-side actuating element in order to initiate the adjustment into the closed / check position. [8] Valve according to one of the preceding claims, wherein the valve body (24) has a valve plate which is encompassed by the housing part (46) so that a flow cross-section is delimited by the outer circumference of the valve plate and the inner circumference of the housing part (46), wherein support webs (70) are formed on an inner circumferential wall of the housing part (46), which support webs extend in the radial direction towards the valve plate and between which a partial region of the flow cross-section is formed. [9] Valve according to one of the preceding claims, wherein a sealing surface (34) for a pump-side coupling piece (74) is formed on the valve insert (4) in the axial direction. [10] Inflatable sports equipment with at least one valve according to one of the preceding claims.

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