EP3529142A1 - Surfboard with overlap - Google Patents

Surfboard with overlap

Info

Publication number
EP3529142A1
EP3529142A1 EP18827079.7A EP18827079A EP3529142A1 EP 3529142 A1 EP3529142 A1 EP 3529142A1 EP 18827079 A EP18827079 A EP 18827079A EP 3529142 A1 EP3529142 A1 EP 3529142A1
Authority
EP
European Patent Office
Prior art keywords
overlap
drive unit
gap
surfboard
component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18827079.7A
Other languages
German (de)
French (fr)
Other versions
EP3529142B1 (en
Inventor
Nicolai WEISENBURGER
Wieland GROTH
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WBV Weisenburger Bau Verwaltung GmbH
Original Assignee
Lampuga GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lampuga GmbH filed Critical Lampuga GmbH
Priority to HRP20221062TT priority Critical patent/HRP20221062T1/en
Priority to EP21209567.3A priority patent/EP3978349A1/en
Publication of EP3529142A1 publication Critical patent/EP3529142A1/en
Application granted granted Critical
Publication of EP3529142B1 publication Critical patent/EP3529142B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/50—Boards characterised by their constructional features
    • B63B32/51—Inflatable boards, e.g. drop-stitch inflatable boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/10—Motor-propelled water sports boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/40—Twintip boards; Wakeboards; Surfboards; Windsurfing boards; Paddle boards, e.g. SUP boards; Accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/50—Boards characterised by their constructional features
    • B63B32/53—Sectionalised boards, e.g. modular, dismountable or foldable boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/57—Boards characterised by the material, e.g. laminated materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/77—Arrangements for fixation of accessories to the board, e.g. inserts or rails

Definitions

  • the invention relates to a surfboard with a fuselage component with a rear-side receptacle, a drive unit which fits in a form-fitting manner in the rear-side receptacle and a underwater surface-side gap between the fuselage component and the drive unit.
  • Inflatable surfboards with a drive unit are known in the art, for example from DE 10 2015 103 503.0.
  • the known surfboard has an inflatable trunk member with rear-side recess and a drive unit which fits into the rear-side recess form-fitting and is inserted into it. Between the drive unit and the fuselage component forms a underwater surface side gap.
  • the powered by the drive unit surfboard can accept significant speeds of 25 knots and more while driving. This creates a flow of water along the underwater surface of the surfboard and a pressure of water on the underwater surface of the surfboard, pushing water into the gap.
  • the form-liquid connection between the hull component and the drive unit is loosened, as a result of which the water resistance of the board is unnecessarily increased and the positive connection is markedly worsened.
  • DE 10 2015 103 863 A1 discloses a surfboard with a two-part drive component which can be detachably fastened at the rear end with fastening means on an inflatable fuselage component.
  • the contours of the two-part drive component and the fuselage component are matched to one another in a complementary manner. It basically has the same problems as the aforementioned prior art.
  • the surfboard according to the invention comprises a fuselage component with rear-side recess, a drive unit which fits into the rear-side recess in a form-fitting manner and is preferably already inserted in it, and a underwater surface-side gap between the fuselage component and drive unit, wherein on the underwater surface of the fuselage component an overlap is arranged, which covers the gap at least in sections.
  • the fuselage component on two lateral arms which engage around the drive unit preferably U-shaped.
  • the overlap is adapted to the course of the gap, and the overlap is therefore also U-shaped and covers at least the bow-side portion of the gap.
  • preferably vertically arranged gap section penetrates so far the most water in the gap. This can be effectively prevented.
  • U-shaped is to be understood here in general. Under U-shape is a strict U-shape but also a shell shape, a rectangular shape or similar. to understand.
  • the body member is inflatable.
  • the penetration of water into the gap leads to a broadening of the gap and an increase in the driving resistance because the hull component gives way somewhat under the pressure of the penetrating water.
  • the hull component can be formed from a drop stitch material and is firmly inflatable.
  • the lateral walls of the fuselage component are rounded outwardly projecting, that is convex. This convex shape of the fuselage component is formed almost automatically by the fact that air is introduced under high pressure in the fuselage component.
  • the circumferential side walls of the drive unit are formed in a corresponding concave. The width and length of the drive unit are chosen so that they fit into the recess in a form-fitting manner.
  • a gap between the hull component and the drive unit still forms, in particular, exactly on the underwater surface. In this gap water is pressed in while driving.
  • a transverse in the direction of travel portion of the gap is covered by the overlap according to the invention.
  • the overlap preferably covers the entire transverse section of the U-shaped gap and at least partially covers the U-shaped side legs of the gap.
  • the overlap on the edge facing away from the recess is as smooth as possible connected to the underwater surface of the fuselage component, so for example bevelled, and directly at the edge, in particular in the direction of travel of the surfboard leading edge, glued or sewn, so that water not even at higher flow between the leading edge of the overlap and the fuselage member may penetrate and desirably the water resistance of the board is not increased by the edge.
  • a releasable fastening means is arranged between an inner side of the overlap facing the drive unit and the underwater surface of the drive unit.
  • “Inner” refers to and in the following on the orientation towards the drive unit or towards the U-shaped recess.
  • a releasable connection for example a hook-and-loop fastener, can be arranged on the drive unit facing the Velcro counterpart and thus additionally at least detachably fasten the overlap to the drive unit.
  • At least one fastening line between the overlap and the body component is provided, advantageously a nominal dimension of the fastening line of the body component being greater than a nominal dimension of the fastening line of the overlap.
  • the attachment lines of fuselage component and overlap are therefore not exactly identical, but in that the attachment line of the fuselage component is slightly larger than that of the overlap, insertion of the drive unit in the fuselage component is initially easily possible in the uninflated state, and the overlap stretches smoothly when the hull component is firmly inflated. This counteracts wrinkling.
  • the overlap is open towards the rear end.
  • the rear end open towards overlap has the advantage that an at least low Bernoulli effect by the along the overlap and the drive component technicallyifmonde water flow can arise, which practically sucked water from the gap.
  • FIG. 1 is a schematic sectional view of a conventional surfboard
  • FIG. 3 is a sectional view of FIG. 1 of the surfboard according to the invention with
  • FIG. 4 is a detail view of FIG. 3,
  • Fig. 5 is a bottom view of the surfboard invention with overlap between
  • Fig. 6 is a view of the underwater surface of the surfboard invention
  • FIGS. 1 and 2 Surfaces 1 according to the prior art are shown in FIGS. 1 and 2.
  • the surfboard 1 has a hull component 2 which is inflatable.
  • the fuselage component 2 is formed in a rear section substantially U-shaped.
  • a drive unit 3 is introduced in a U-shaped receptacle 4 of the fuselage component 2.
  • the fuselage component 2 can be made of a so-called drop stitch material.
  • the drop stitch material is produced by the drop stitch method, in which two or more plastic fabric webs, preferably denier polyester fabric webs are superimposed.
  • the two plastic webs are interconnected by a plurality, ie thousands of polyester threads.
  • the polyester threads are sewn on both sides with the two fabric webs, for example using a drop stitch sewing machine.
  • the two fabric webs sewn together form the scaffold, which gives the body part 2 in the inflated state its mechanical strength.
  • the two interconnected fabric sheets are cut to the desired shape.
  • the upper and lower fabric webs are preferably coated with PVC layers, preferably with three layers, pressed in layers and glued. The sides are glued overlapping with seam tape and pressed, so that the airtight hull component 2 is formed.
  • the drop stitch method makes it possible to manufacture the inflatable trunk member 2 with excellent mechanical strength properties that can withstand both high tensile, compressive and shear loads.
  • the drop stitch outer skin of the inflatable fuselage component 2 is airtight and pronouncedly stable in the inflated state, so that a surfer can stand and surf on the fuselage component 2 while maintaining the outer shape of the inflated fuselage component 2.
  • the fuselage component 2 is filled with air under high pressure. The filling can be done by means of an air pump or a compressor.
  • the compressor can be powered by the electrical energy of built-in surfboard 1 accumulators.
  • the fuselage component 2 made from the drop stitch material is preferably noise-dampening, so that the volume generated by wave impact, but also by the drive, is damped by the hull.
  • the fuselage component 2 is low-vibration during operation because vibrations are reduced by the drop stitch material. Since the body member 2 is somewhat deformable, shocks by waves, etc. are advantageously absorbed. It is also advantageous compared to conventional surfboards 1, that the softer hull causes less injury, z. B. when the surfboard 1 collides with the fall of the surfer with the surfer.
  • the rear-side region of the fuselage component 2 has the receptacle 4 for the drive unit 3.
  • the drive unit 3 may comprise a jet drive.
  • the jet propulsion system comprises an opening for the water inlet to an underwater surface 7 of the drive unit 3 and a water channel to the rear end face of the drive unit 3.
  • the water outlet can be formed there through a nozzle.
  • the nozzle may be pivotable or fixed.
  • a rotor In the water channel, a rotor is provided, which sucks in its high speed in operation water into the water channel and squirts backwards through the nozzle and the surfboard 1 thus gives the propulsion.
  • the rotor is connected via a drive train to a motor, preferably an electric motor, which may be controllable via a controller and which is supplied with power by means of the accumulator.
  • the drive unit 3 is altogether exchangeable.
  • the term rotor is to be understood here broadly. It can be a propeller, an impeller or similar. act.
  • a gap 6 is formed between the drive unit 3 and the fuselage component 2. Since the fuselage component 2 is convexly formed in the receptacle 4 along a side inner wall running around the drive unit 3, an outer circumference of the drive unit 3 is positively adapted to this contour by a concave configuration However, this adjustment can never be so accurate that no gap 6, in particular not directly on the lower water surface 7, at the butt joint between the fuselage component 2 and the drive unit 3, arises.
  • the gap 6 is shown in FIG. 2 exaggerated wide. However, the problem becomes apparent that when driving the surfboard 1 water is literally pushed by the flow velocity in the gap 6. The water flow is represented by the longer arrows. A direction of travel F of the surfboard 1 is shown by a wide arrow.
  • FIG. 3 shows the surfboard 1 according to the invention, which has an overlap 8 on the underwater surface 7.
  • the overlap 8 is a flap formed from PVC, PE, PET or another plastic material, which is likewise U-shaped in a plan view substantially according to FIG. 5 and covers the gap 6 at least in sections.
  • the overlap 8 may also consist of leather or other natural materials or a metal foil.
  • the overlap 8 is provided in particular to a transverse in the direction of travel F gap portion 6a, which is located between an advancing in the direction F edge of the drive unit 3 and a corresponding transverse inner wall 2a of the fuselage component 2 and overlaps the transverse gap portion 6a completely.
  • the flap 8 is sewn tightly to the fuselage component 2, glued or welded.
  • adhesive or seaming line 9 is provided, or there are several of the welding, adhesive or seaming line 9 is provided, which follows the receptacle 4 facing away edge 1 1 of the overlap 8 or follow.
  • the overlap 8 in the direction of travel F leading or laterally extending edge 1 1 is preferably bevelled in the direction of travel F and glued along the entire edge 1 1 with the fuselage component 2, so that even while driving through the water flow no water between the Underwater surface 7 of the fuselage component 2 and the overlap 8 can penetrate, but the flow of water as shown in FIG. 4 is deflected under the cloth.
  • the overlap 8 may be detachably connected to the drive unit 3 in a portion overlapping with the drive unit 3; For this purpose, a hook and loop fastener 12 according to FIG.
  • Fig. 6 shows the overlap 8 in a bottom view.
  • the bottom view shows the U-shaped receptacle 4, which is formed by the body part 2.
  • On the side of the drive unit 3 are inflatable, in cross-section perpendicular to the direction of travel F circular arms of the fuselage component 2 are arranged, which surround the drive unit 3 between them.
  • overlap 8 is provided, which does not necessarily completely cover the gap 6, but the transverse to the direction of travel F, preferably perpendicular gap portion 6a, penetrated into the conventionally very much water is completely covered.

Abstract

The invention relates to a surfboard having an inflatable hull part (2) with a rear receptacle (4), a drive unit (3), which fits into the rear receptacle (4) in a form-fitting manner, an underwater-surface gap (6) between the hull part (3) and the drive unit (3), wherein an overlap (8), which at least partly covers the gap (6), is arranged on an underwater surface (7) of the hull part (2).

Description

Surfboard mit Überlapp  Surfboard with overlap
Die Erfindung betrifft ein Surfboard mit einem Rumpfbauteil mit einer heckseitigen Aufnahme, einer Antriebseinheit, die formschlüssig in die heckseitige Aufnahme passt und einem unterwasserflächenseitigen Spalt zwischen dem Rumpfbauteil und der Antriebseinheit. The invention relates to a surfboard with a fuselage component with a rear-side receptacle, a drive unit which fits in a form-fitting manner in the rear-side receptacle and a underwater surface-side gap between the fuselage component and the drive unit.
Aufblasbare Surfboards mit einer Antriebseinheit sind im Stand der Technik beispielsweise aus der DE 10 2015 103 503.0 bekannt. Das bekannte Surfboard weist ein aufblasbares Rumpfbauteil mit heckseitiger Aussparung auf sowie eine Antriebseinheit, die in die heckseitige Aussparung formschlüssig passt und in sie eingefügt ist. Zwischen der Antriebseinheit und dem Rumpfbauteil bildet sich ein unterwasserflächenseitiger Spalt aus. Das durch die Antriebseinheit angetriebene Surfboard kann erhebliche Geschwindigkeiten von 25 Knoten und mehr während der Fahrt annehmen. Dadurch entstehen eine Wasserströmung entlang der Unterwasserfläche des Surfboards und ein Wasserdruck auf die Unterwasserfläche des Surfboards, der Wasser in den Spalt hineindrückt. Dadurch wird die formflüssige Verbindung zwischen Rumpfbauteil und Antriebseinheit gelockert, wodurch sich der Wasserwiderstand des Boards unnötig erhöht und der Formschluss wird deutlich verschlechtert. Inflatable surfboards with a drive unit are known in the art, for example from DE 10 2015 103 503.0. The known surfboard has an inflatable trunk member with rear-side recess and a drive unit which fits into the rear-side recess form-fitting and is inserted into it. Between the drive unit and the fuselage component forms a underwater surface side gap. The powered by the drive unit surfboard can accept significant speeds of 25 knots and more while driving. This creates a flow of water along the underwater surface of the surfboard and a pressure of water on the underwater surface of the surfboard, pushing water into the gap. As a result, the form-liquid connection between the hull component and the drive unit is loosened, as a result of which the water resistance of the board is unnecessarily increased and the positive connection is markedly worsened.
In der DE 10 2015 103 863 A1 ist ein Surfboard mit einem zweiteiligen Antriebsbauteil offenbart, das am heckseitigen Ende mit Befestigungsmitteln an einem aufblasbaren Rumpfbauteil lösbar befestigt werden kann. Die Konturen des zweiteiligen Antriebsbauteils und des Rumpfbauteils sind einander komplementär angepasst. Es weist grundsätzlich dieselben Probleme wie der vorgenannte Stand der Technik auf. DE 10 2015 103 863 A1 discloses a surfboard with a two-part drive component which can be detachably fastened at the rear end with fastening means on an inflatable fuselage component. The contours of the two-part drive component and the fuselage component are matched to one another in a complementary manner. It basically has the same problems as the aforementioned prior art.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Surfboard zur Verfügung zu stellen, das die oben genannten Nachteile vermeidet, zumindest verringert. It is therefore an object of the present invention to provide a surfboard which avoids, at least reduces, the abovementioned disadvantages.
Die Aufgabe wird durch ein eingangs genanntes Surfboard mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. The problem is solved by an aforementioned surfboard with the characterizing features of claim 1.
Bevorzugte Ausführungsformen sind Gegenstand der Unteransprüche. Preferred embodiments are subject of the dependent claims.
Das erfindungsgemäße Surfboard umfasst ein Rumpfbauteil mit heckseitiger Aussparung, eine Antriebseinheit, die in die heckseitige Aussparung formschlüssig passt und vorzugsweise bereits in sie eingefügt ist, und einen unterwasserflächenseitigen Spalt zwischen Rumpfbauteil und Antriebseinheit, wobei an der Unterwasserfläche des Rumpfbauteils ein Überlapp angeordnet ist, der den Spalt zumindest abschnittsweise abdeckt. The surfboard according to the invention comprises a fuselage component with rear-side recess, a drive unit which fits into the rear-side recess in a form-fitting manner and is preferably already inserted in it, and a underwater surface-side gap between the fuselage component and drive unit, wherein on the underwater surface of the fuselage component an overlap is arranged, which covers the gap at least in sections.
Es hat sich gezeigt, dass der Eintritt von Wasser in den Spalt effektiv gemindert werden kann, wenn ein Überlapp an der Unterwasserfläche des Rumpfbauteils angeordnet ist, der den Spalt zumindest abschnittsweise abdeckt. Es ist nicht unbedingt erforderlich, einen wasserdichten Abschluss gegenüber dem umgebenden Wasser zu erreichen. Der Überlapp hat jedoch die Funktion, dass während der Fahrt, also wenn sich eine Wasserströmung entlang der Unterwasserfläche des Surfboards ausbildet, diese Wasserströmung nicht mehr in den Spalt eindringen kann, sondern entlang der Unterwasserfläche über den Spalt hinweg geleitet wird. Das Wassereindringen in den Spalt wird so weitgehend verhindert, und zusätzlich kann eine geringe Sogwirkung an dem offenen Ende des Überlapps stattfinden, die das in dem Spalt befindliche Wasser sogar noch etwas heraussaugt. It has been found that the entry of water into the gap can be effectively reduced if an overlap on the underwater surface of the fuselage component is arranged, which covers the gap at least in sections. It is not absolutely necessary to achieve a watertight seal against the surrounding water. The overlap, however, has the function that during the trip, so when a water flow forms along the underwater surface of the surfboard, this water flow can no longer penetrate into the gap, but is conducted along the underwater surface over the gap. The water penetration into the gap is thus largely prevented, and in addition, a slight suction effect can take place at the open end of the overlap, which even sucks the water in the gap even slightly.
Günstigerweise weist das Rumpfbauteil zwei seitliche Arme auf, die die Antriebseinheit vorzugsweise U-förmig umgreifen. Der Überlapp ist dem Verlauf des Spaltes angepasst, und der Überlapp ist daher ebenfalls U-förmig ausgebildet und überdeckt zumindest den bugseitigen Abschnitt des Spaltes. In den bugseitigen zur Fahrtrichtung quer, vorzugsweise senkrecht angeordneten Spaltabschnitt dringt bisher am meisten Wasser in den Spalt ein. Das kann wirksam verhindert werden. U-förmig ist hier allgemein zu verstehen. Unter U-Form ist eine strenge U-Form aber auch eine Schalenform, eine rechteckige Form o.Ä. zu verstehen. Conveniently, the fuselage component on two lateral arms which engage around the drive unit preferably U-shaped. The overlap is adapted to the course of the gap, and the overlap is therefore also U-shaped and covers at least the bow-side portion of the gap. In the bow-side to the direction of travel transversely, preferably vertically arranged gap section penetrates so far the most water in the gap. This can be effectively prevented. U-shaped is to be understood here in general. Under U-shape is a strict U-shape but also a shell shape, a rectangular shape or similar. to understand.
Vorzugsweise ist das Rumpfbauteil aufblasbar ausgebildet. Insbesondere bei aufblasbaren Rumpfbauteilen kommt es durch das Eidringen von Wasser in den Spalt zu einer Spaltverbreiterung und einer Erhöhung des Fahrwiderstandes, weil das Rumpfbauteil unter dem Druck des eindringenden Wassers etwas nachgibt. Preferably, the body member is inflatable. In particular with inflatable fuselage components, the penetration of water into the gap leads to a broadening of the gap and an increase in the driving resistance because the hull component gives way somewhat under the pressure of the penetrating water.
Das Rumpfbauteil kann aus einem Drop Stitch Material gebildet sein und ist fest aufblasbar. Die seitlichen Wandungen des Rumpfbauteils sind nach außen abgerundet hervorstehend, also konvex ausgebildet. Diese konvexe Ausformung des Rumpfbauteils bildet sich quasi automatisch dadurch, dass Luft unter hohem Druck in das Rumpfbauteil eingeleitet wird. Die umlaufenden seitlichen Wandungen der Antriebseinheit sind in entsprechender weise konkav ausgebildet. Breite und Länge der Antriebseinheit sind so gewählt, dass sie in die Aussparung formschlüssig hineinpassen. Trotz genauer Anpassung der seitlichen Wandungen der Antriebseinheit an das aufgeblasene Rumpfbauteil bildet sich dennoch insbesondere exakt an der Unterwasserfläche ein Spalt zwischen Rumpfbauteil und Antriebseinheit aus. In diesen Spalt wird Wasser während der Fahrt hineingedrückt. Insbesondere ein in Fahrtrichtung querverlaufender Abschnitt des Spaltes ist erfindungsgemäß durch den Überlapp abgedeckt. Der Überlapp deckt vorzugsweise den gesamten querlaufenden Abschnitt des U-förmigen Spaltes ab und deckt zumindest ein Stück weit die U-förmigen Seitenschenkel des Spaltes ab. Vorzugsweise ist der Überlapp an der der Aussparung abgewandten Kante möglichst glatt mit der Unterwasserfläche des Rumpfbauteils verbunden, also beispielsweise abgeschrägt, und direkt an der Kante, insbesondere der in Fahrtrichtung des Surfboards vorlaufenden Kante, verklebt oder vernäht, so dass Wasser auch bei stärkerer Strömung nicht zwischen die vorlaufende Kante des Überlapps und das Rumpfbauteil dringen kann und günstigerweise der Wasserwiderstand des Boards nicht durch die Kante erhöht wird. The hull component can be formed from a drop stitch material and is firmly inflatable. The lateral walls of the fuselage component are rounded outwardly projecting, that is convex. This convex shape of the fuselage component is formed almost automatically by the fact that air is introduced under high pressure in the fuselage component. The circumferential side walls of the drive unit are formed in a corresponding concave. The width and length of the drive unit are chosen so that they fit into the recess in a form-fitting manner. Despite precise adaptation of the lateral walls of the drive unit to the inflated hull component, however, a gap between the hull component and the drive unit still forms, in particular, exactly on the underwater surface. In this gap water is pressed in while driving. In particular, a transverse in the direction of travel portion of the gap is covered by the overlap according to the invention. The overlap preferably covers the entire transverse section of the U-shaped gap and at least partially covers the U-shaped side legs of the gap. Preferably, the overlap on the edge facing away from the recess is as smooth as possible connected to the underwater surface of the fuselage component, so for example bevelled, and directly at the edge, in particular in the direction of travel of the surfboard leading edge, glued or sewn, so that water not even at higher flow between the leading edge of the overlap and the fuselage member may penetrate and desirably the water resistance of the board is not increased by the edge.
In einer weiteren günstigen Ausführungsform der Erfindung ist zwischen einer der Antriebseinheit zugewandten Innenseite des Überlapps und der Unterwasserfläche der Antriebseinheit ein lösbares Befestigungsmittel angeordnet. In a further favorable embodiment of the invention, a releasable fastening means is arranged between an inner side of the overlap facing the drive unit and the underwater surface of the drive unit.
„Innen“ bezieht sich dabei und im Folgenden auf die Orientierung hin zur Antriebseinheit oder hin zur U-förmigen Aussparung. Entlang einer Innenseite des Überlapps kann an der der Antriebseinheit zugewandten Seite des Überlapps eine lösbare Verbindung, beispielsweise ein Klettverschluss angeordnet sein, der mit einem an der Unterwasserfläche der Antriebseinheit angeordneten Klettverschluss-Gegenstück zusammenwirkt und den Überlapp somit zusätzlich auch an der Antriebseinheit zumindest lösbar befestigt. Dadurch kann das Eindringen von Wasser weiter vermindert werden und die Gefahr der Erhöhung des Wasserwiderstands des Boards durch den Überlapp kann ebenfalls vermindert werden. "Inner" refers to and in the following on the orientation towards the drive unit or towards the U-shaped recess. Along an inner side of the overlap, a releasable connection, for example a hook-and-loop fastener, can be arranged on the drive unit facing the Velcro counterpart and thus additionally at least detachably fasten the overlap to the drive unit. As a result, the penetration of water can be further reduced and the risk of increasing the water resistance of the board by the overlap can also be reduced.
Damit ein möglichst geringer zusätzlicher Strömungswiderstand entsteht und der Überlapp den Spalt möglichst günstig abdeckt, ist zumindest eine Befestigungslinie zwischen Überlapp und Rumpfbauteil vorgesehen, wobei vorteilhafterweise ein Nennmaß der Befestigungslinie des Rumpfbauteils größer ist als ein Nennmaß der Befestigungslinie des Überlapps. Die Befestigungslinien von Rumpfbauteil und Überlapp sind also nicht exakt identisch, sondern dadurch, dass die Befestigungslinie des Rumpfbauteils etwas größer ist als die des Überlapps, ist ein Einfügen der Antriebseinheit in das Rumpfbauteil zunächst im nicht aufgeblasenen Zustand leicht möglich, und der Überlapp spannt sich glatt, wenn das Rumpfbauteil fest aufgeblasen wird. Dadurch wird einer Faltenbildung entgegengewirkt. So that the smallest possible additional flow resistance is created and the overlap covers the gap as low as possible, at least one fastening line between the overlap and the body component is provided, advantageously a nominal dimension of the fastening line of the body component being greater than a nominal dimension of the fastening line of the overlap. The attachment lines of fuselage component and overlap are therefore not exactly identical, but in that the attachment line of the fuselage component is slightly larger than that of the overlap, insertion of the drive unit in the fuselage component is initially easily possible in the uninflated state, and the overlap stretches smoothly when the hull component is firmly inflated. This counteracts wrinkling.
Vorzugsweise ist der Überlapp zum heckseitigen Ende hin offen. Der zum heckseitigen Ende hin offene Überlapp hat den Vorteil, dass ein zumindest geringer Bernoulli-Effekt durch die entlang dem Überlapp und dem Antriebsbauteil vorbeifließende Wasserströmung entstehen kann, die quasi noch Wasser aus dem Spalt heraussaugt. Preferably, the overlap is open towards the rear end. The rear end open towards overlap has the advantage that an at least low Bernoulli effect by the along the overlap and the drive component vorbeifließende water flow can arise, which practically sucked water from the gap.
Die Erfindung wird anhand eines Ausführungsbeispiels in sechs Figuren beschrieben. Dabei zeigen: The invention will be described with reference to an embodiment in six figures. Showing:
Fig. 1 eine schematische Schnittansicht eines herkömmlichen Surfboards, 1 is a schematic sectional view of a conventional surfboard,
Fig. 2 eine Detailansicht des Spaltes zwischen Rumpfbauteil und Antriebseinheit,  2 is a detail view of the gap between the body member and drive unit,
Fig. 3 eine Schnittansicht gemäß Fig. 1 des erfindungsgemäßen Surfboards mit Fig. 3 is a sectional view of FIG. 1 of the surfboard according to the invention with
Überlapp,  Overlap,
Fig. 4 eine Detailansicht der Fig. 3, 4 is a detail view of FIG. 3,
Fig. 5 eine Untenansicht des erfindungsgemäßen Surfboards mit Überlapp zwischen Fig. 5 is a bottom view of the surfboard invention with overlap between
Rumpfbauteil und Antriebseinheit,  Hull component and drive unit,
Fig. 6 eine Ansicht der Unterwasserfläche des erfindungsgemäßen Surfboards mit Fig. 6 is a view of the underwater surface of the surfboard invention
Überlapp.  Overlap.
In den Fig. 1 und Fig. 2 sind Surfboards 1 nach dem Stand der Technik dargestellt. Das Surfboard 1 weist ein Rumpfbauteil 2 auf, das aufblasbar ist. In einer Draufsicht ist das Rumpfbauteil 2 in einem Heckabschnitt im Wesentlichen U-förmig ausgebildet. In eine U- förmige Aufnahme 4 des Rumpfbauteils 2 ist eine Antriebseinheit 3 eingebracht. Surfaces 1 according to the prior art are shown in FIGS. 1 and 2. The surfboard 1 has a hull component 2 which is inflatable. In a plan view, the fuselage component 2 is formed in a rear section substantially U-shaped. In a U-shaped receptacle 4 of the fuselage component 2, a drive unit 3 is introduced.
Das Rumpfbauteil 2 kann aus einem sogenannten Drop Stitch Material gefertigt sein. Das Drop Stitch Material wird im Drop Stitch Verfahren hergestellt, bei dem zwei oder mehrere Kunststoffgewebebahnen, vorzugsweise Denierpolyestergewebebahnen übereinandergelegt werden. Die beiden Kunststoffgewebebahnen werden durch eine Vielzahl, d. h. Tausende von Polyesterfäden, miteinander verbunden. Dabei wird der maximale Abstand der beiden Gewebebahnen festgelegt, so dass der zwischen den Gewebebahnen mit Polyester gefüllte Raum später mit Druckluft gefüllt werden kann und die Gewebebahnen dabei weitgehend parallel zueinander sind. Die Polyesterfäden werden beispielsweise mit Hilfe einer Drop Stitch Nähmaschine beidseitig mit den beiden Gewebebahnen vernäht. Die beiden miteinander vernähten Gewebebahnen bilden das Stützgerüst, das dem Rumpfbauteil 2 im aufgeblasenen Zustand seine mechanische Festigkeit verleiht. Die beiden miteinander verbundenen Gewebebahnen werden auf die gewünschte Form zugeschnitten. Die obere und die untere Gewebebahn werden vorzugsweise mit PVC- Schichten, vorzugsweise mit drei Schichten, beschichtet, schichtweise gepresst und verklebt. Die Seiten werden mit Nahtband überlappend verklebt und gepresst, so dass das luftdichte Rumpfbauteil 2 entsteht. The fuselage component 2 can be made of a so-called drop stitch material. The drop stitch material is produced by the drop stitch method, in which two or more plastic fabric webs, preferably denier polyester fabric webs are superimposed. The two plastic webs are interconnected by a plurality, ie thousands of polyester threads. In this case, the maximum distance between the two fabric webs is determined so that the space filled with polyester between the fabric webs can later be filled with compressed air and the fabric webs are largely parallel to one another. The polyester threads are sewn on both sides with the two fabric webs, for example using a drop stitch sewing machine. The two fabric webs sewn together form the scaffold, which gives the body part 2 in the inflated state its mechanical strength. The two interconnected fabric sheets are cut to the desired shape. The upper and lower fabric webs are preferably coated with PVC layers, preferably with three layers, pressed in layers and glued. The sides are glued overlapping with seam tape and pressed, so that the airtight hull component 2 is formed.
Das Drop Stitch Verfahren ermöglicht es, das aufblasbare Rumpfbauteil 2 mit hervorragenden mechanischen Festigkeitseigenschaften zu fertigen, die sowohl hohen Zug- als auch Druck- und Scherbelastungen standhalten. Die Drop Stitch Außenhaut des aufblasbaren Rumpfbauteils 2 ist luftdicht und im aufgeblasenen Zustand ausgesprochen verformungsstabil, so dass ein Surfer auch unter Beibehaltung der Außenform des aufgeblasenen Rumpfbauteils 2 auf dem Rumpfbauteil 2 stehen und surfen kann. Das Rumpfbauteil 2 ist mit Luft unter Hochdruck befüllt. Die Befüllung kann mittels einer Luftpumpe oder eines Kompressors erfolgen. Der Kompressor kann mit der elektrischen Energie von im Surfboard 1 eingebauten Akkumulatoren gespeist werden. The drop stitch method makes it possible to manufacture the inflatable trunk member 2 with excellent mechanical strength properties that can withstand both high tensile, compressive and shear loads. The drop stitch outer skin of the inflatable fuselage component 2 is airtight and pronouncedly stable in the inflated state, so that a surfer can stand and surf on the fuselage component 2 while maintaining the outer shape of the inflated fuselage component 2. The fuselage component 2 is filled with air under high pressure. The filling can be done by means of an air pump or a compressor. The compressor can be powered by the electrical energy of built-in surfboard 1 accumulators.
Das aus dem Drop Stitch Material gefertigte Rumpfbauteil 2 ist vorzugsweise geräuschdämpfend, sodass die Lautstärke, die durch Wellenschlag, aber auch durch den Antrieb erzeugt wird, durch den Rumpf gedämpft wird. Das Rumpfbauteil 2 ist während des Betriebs schwingungsarm, weil durch das Drop Stitch Material Schwingungen reduziert werden. Da das Rumpfbauteil 2 etwas verformbar ist, werden Stöße durch Wellen usw. vorteilhafterweise aufgefangen. Vorteilhaft ist des Weiteren gegenüber herkömmlichen Surfboards 1 , dass der weichere Rumpf weniger Verletzungen hervorruft, z. B. wenn das Surfboard 1 beim Herunterfallen des Surfers mit dem Surfer kollidiert. The fuselage component 2 made from the drop stitch material is preferably noise-dampening, so that the volume generated by wave impact, but also by the drive, is damped by the hull. The fuselage component 2 is low-vibration during operation because vibrations are reduced by the drop stitch material. Since the body member 2 is somewhat deformable, shocks by waves, etc. are advantageously absorbed. It is also advantageous compared to conventional surfboards 1, that the softer hull causes less injury, z. B. when the surfboard 1 collides with the fall of the surfer with the surfer.
Der heckseitige Bereich des Rumpfbauteils 2 weist die Aufnahme 4 für die Antriebseinheit 3 auf. Die Antriebseinheit 3 kann einen Jetantrieb umfassen. Der Jetantrieb umfasst eine Öffnung für den Wassereinlass an einer Unterwasserfläche 7 der Antriebseinheit 3 sowie einen Wasserkanal zur heckseitigen Stirnfläche der Antriebseinheit 3 hin. Der Wasserauslass kann dort durch eine Düse gebildet werden. Die Düse kann schwenkbar oder fest angeordnet sein. The rear-side region of the fuselage component 2 has the receptacle 4 for the drive unit 3. The drive unit 3 may comprise a jet drive. The jet propulsion system comprises an opening for the water inlet to an underwater surface 7 of the drive unit 3 and a water channel to the rear end face of the drive unit 3. The water outlet can be formed there through a nozzle. The nozzle may be pivotable or fixed.
Im Wasserkanal ist ein Rotor vorgesehen, der durch seine hohe Drehzahl in Betrieb Wasser in den Wasserkanal hineinsaugt und nach hinten durch die Düse herausspritzt und dem Surfboard 1 somit den Vortrieb verleiht. Der Rotor ist über einen Antriebsstrang mit einem Motor verbunden, vorzugsweise einem Elektromotor, der ggf. über eine Steuerung steuerbar ist und der mittels des Akkumulators mit Strom versorgt wird. Die Antriebseinheit 3 ist insgesamt austauschbar. Der Begriff des Rotors ist hier weit zu verstehen. Es kann sich dabei um einen Propeller, einen Impeller o.Ä. handeln. In the water channel, a rotor is provided, which sucks in its high speed in operation water into the water channel and squirts backwards through the nozzle and the surfboard 1 thus gives the propulsion. The rotor is connected via a drive train to a motor, preferably an electric motor, which may be controllable via a controller and which is supplied with power by means of the accumulator. The drive unit 3 is altogether exchangeable. The term rotor is to be understood here broadly. It can be a propeller, an impeller or similar. act.
Zwischen der Antriebseinheit 3 und dem Rumpfbauteil 2 entsteht ein Spalt 6. Da das Rumpfbauteil 2 in die Aufnahme 4 hinein entlang einer die Antriebseinheit 3 etwa dreiviertel umlaufenden Seiteninnenwandung konvex ausgebildet ist, ist ein Außenumfang der Antriebseinheit 3 zwar dieser Kontur durch eine konkave Ausbildung formschlüssig angepasst, jedoch kann diese Anpassung nie so exakt erfolgen, dass kein Spalt 6, insbesondere nicht direkt an der Wasserunterfläche 7, an der Stoßfuge zwischen dem Rumpfbauteil 2 und der Antriebseinheit 3, entsteht. Der Spalt 6 ist in der Fig. 2 übertrieben breit dargestellt. Jedoch wird das Problem erkennbar, dass bei der Fahrt des Surfboards 1 Wasser durch die Strömungsgeschwindigkeit regelrecht in den Spalt 6 hineingedrückt wird. Der Wasserstrom ist durch die längeren Pfeile dargestellt. Eine Fahrtrichtung F des Surfboards 1 ist durch einen breiten Pfeil dargestellt. A gap 6 is formed between the drive unit 3 and the fuselage component 2. Since the fuselage component 2 is convexly formed in the receptacle 4 along a side inner wall running around the drive unit 3, an outer circumference of the drive unit 3 is positively adapted to this contour by a concave configuration However, this adjustment can never be so accurate that no gap 6, in particular not directly on the lower water surface 7, at the butt joint between the fuselage component 2 and the drive unit 3, arises. The gap 6 is shown in FIG. 2 exaggerated wide. However, the problem becomes apparent that when driving the surfboard 1 water is literally pushed by the flow velocity in the gap 6. The water flow is represented by the longer arrows. A direction of travel F of the surfboard 1 is shown by a wide arrow.
Fig. 3 zeigt das erfindungsgemäße Surfboard 1 , das einen Überlapp 8 an der Unterwasserfläche 7 aufweist. Bei dem Überlapp 8 handelt es sich um einen aus PVC, PE, PET oder aus einem anderen Kunststoffmaterial gebildeten Lappen, der ebenfalls in einer Draufsicht im Wesentlichen gemäß Fig. 5 U-förmig ausgebildet ist und den Spalt 6 zumindest abschnittsweise überdeckt. Der Überlapp 8 kann aber auch aus Leder oder anderen Naturmaterialien oder auch einer Metallfolie bestehen. Der Überlapp 8 ist insbesondere zu einem in der Fahrtrichtung F quergestellten Spaltabschnitt 6a vorgesehen, der sich zwischen einer in der Fahrtrichtung F vorlaufenden Kante der Antriebseinheit 3 und einer entsprechenden, querstehenden Innenwandung 2a des Rumpfbauteils 2 befindet und überlappt den querlaufenden Spaltabschnitt 6a vollständig. Der Lappen 8 ist mit dem Rumpfbauteil 2 fest vernäht, verklebt oder verschweißt. Dafür ist eine Schweiß-, Klebe- oder Nahtlinie 9 vorgesehen, oder es sind mehrere der Schweiß-, Klebe- oder Nahtlinie 9 vorgesehen, die der der Aufnahme 4 abgewandten Kante 1 1 des Überlapps 8 folgt bzw. folgen. Die dem Überlapp 8 in der Fahrtrichtung F vorlaufende oder seitlich an ihm verlaufende Kante 1 1 ist vorzugsweise in der Fahrtrichtung F angeschrägt und entlang der gesamten Kante 1 1 mit dem Rumpfbauteil 2 verklebt, so dass auch während der Fahrt durch die Wasserströmung kein Wasser zwischen der Unterwasserfläche 7 des Rumpfbauteils 2 und dem Überlapp 8 eindringen kann, sondern die Wasserströmung gemäß Fig. 4 unter dem Lappen umgelenkt wird. Der Überlapp 8 kann mit der Antriebseinheit 3 in einem Abschnitt, der mit der Antriebseinheit 3 überlappt, lösbar verbunden sein; dazu kann ein Klettverschluss 12 gemäß Fig. 3 oder Ähnliches zwischen dem der Antriebseinheit 3 zugewandten Rand des Überlapps 8 und der Antriebseinheit 3 ausgebildet sein. Der Überlapp 8 liegt vorzugsweise faltenfrei eng an der Unterwasserfläche 7 der Antriebseinheit 3 an. Fig. 6 zeigt den Überlapp 8 in einer Untenansicht. Die Untenansicht zeigt die U-förmige Aufnahme 4, die durch das Rumpfbauteil 2 ausgebildet wird. Seitlich an der Antriebseinheit 3 sind aufblasbare, im Querschnitt senkrecht zur Fahrtrichtung F kreisförmige Arme des Rumpfbauteils 2 angeordnet, die zwischen sich die Antriebseinheit 3 umgreifen. An dem in der Fahrtrichtung F vorlaufenden Teil der Antriebseinheit 3 ist der mit Rumpfbauteil 2 verbundene Überlapp 8 vorgesehen, der den Spalt 6 nicht notwendigerweise vollständig überdeckt, jedoch den zur Fahrtrichtung F quer, vorzugsweise senkrecht verlaufenden Spaltabschnitt 6a, in den herkömmlicherweise besonders viel Wasser eingedrungen ist, vollständig überdeckt. FIG. 3 shows the surfboard 1 according to the invention, which has an overlap 8 on the underwater surface 7. The overlap 8 is a flap formed from PVC, PE, PET or another plastic material, which is likewise U-shaped in a plan view substantially according to FIG. 5 and covers the gap 6 at least in sections. The overlap 8 may also consist of leather or other natural materials or a metal foil. The overlap 8 is provided in particular to a transverse in the direction of travel F gap portion 6a, which is located between an advancing in the direction F edge of the drive unit 3 and a corresponding transverse inner wall 2a of the fuselage component 2 and overlaps the transverse gap portion 6a completely. The flap 8 is sewn tightly to the fuselage component 2, glued or welded. For a welding, adhesive or seaming line 9 is provided, or there are several of the welding, adhesive or seaming line 9 is provided, which follows the receptacle 4 facing away edge 1 1 of the overlap 8 or follow. The overlap 8 in the direction of travel F leading or laterally extending edge 1 1 is preferably bevelled in the direction of travel F and glued along the entire edge 1 1 with the fuselage component 2, so that even while driving through the water flow no water between the Underwater surface 7 of the fuselage component 2 and the overlap 8 can penetrate, but the flow of water as shown in FIG. 4 is deflected under the cloth. The overlap 8 may be detachably connected to the drive unit 3 in a portion overlapping with the drive unit 3; For this purpose, a hook and loop fastener 12 according to FIG. 3 or the like between the drive unit 3 facing edge of the overlap 8 and the drive unit 3 may be formed. The overlap 8 is preferably wrinkle-free tight against the underwater surface 7 of the drive unit 3. Fig. 6 shows the overlap 8 in a bottom view. The bottom view shows the U-shaped receptacle 4, which is formed by the body part 2. On the side of the drive unit 3 are inflatable, in cross-section perpendicular to the direction of travel F circular arms of the fuselage component 2 are arranged, which surround the drive unit 3 between them. At the leading in the direction of travel F part of the drive unit 3 is connected to the body part 2 overlap 8 is provided, which does not necessarily completely cover the gap 6, but the transverse to the direction of travel F, preferably perpendicular gap portion 6a, penetrated into the conventionally very much water is completely covered.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Surfboard 1 surfboard
2 Rumpfbauteil  2 hull component
2a Innenwandung 2a inner wall
3 Antriebseinheit  3 drive unit
4 Aufnahme  4 recording
6 Spalt 6 gap
6a Spaltabschnitt 6a gap section
7 Unterwasserfläche  7 underwater area
8 Überlapp  8 overlap
9 Schweiß- oder Nahtlinie 11 Kante  9 Weld or seam line 11 edge
12 Klettverschluss  12 Velcro fastener
F Fahrtrichtung F direction of travel

Claims

Patentansprüche claims
1. Surfboard mit 1st surfboard with
einem Rumpfbauteil (2) mit einer heckseitigen Aufnahme (4),  a hull component (2) with a rear-side receptacle (4),
einer Antriebseinheit (3), die formschlüssig in die heckseitige Aufnahme (4) passt, einem unterwasserflächenseitigen Spalt (6) zwischen dem Rumpfbauteil (2) und der Antriebseinheit (3),  a drive unit (3) which fits in a form-fitting manner into the rear-side receptacle (4), a gap (6) underwater surface side between the fuselage component (2) and the drive unit (3),
dadurch gekennzeichnet, dass  characterized in that
an einer Unterwasserfläche (7) des Rumpfbauteils (2) ein Überlapp (8) angeordnet ist, der den Spalt (6) zumindest abschnittsweise abdeckt.  on an underwater surface (7) of the fuselage component (2) an overlap (8) is arranged, which covers the gap (6) at least in sections.
2. Surfboard nach Anspruch 1 , 2. surfboard according to claim 1,
dadurch gekennzeichnet, dass das Rumpfbauteil (2) aufblasbar ist.  characterized in that the body member (2) is inflatable.
3. Surfboard nach Anspruch 1 oder 2, 3. surfboard according to claim 1 or 2,
dadurch gekennzeichnet, dass das Rumpfteil (2) zwei seitliche Arme aufweist, die die Antriebseinheit (3) U-förmig umgreifen, und der Überlapp (8) ebenfalls U-förmig ausgebildet ist und zumindest den bugseitigen Abschnitt des Spaltes (6) überdeckt.  characterized in that the body part (2) has two lateral arms, which surround the drive unit (3) U-shaped, and the overlap (8) is also U-shaped and at least the bow-side portion of the gap (6) covered.
4. Surfboard nach Anspruch 1 , 2 oder 3, 4. surfboard according to claim 1, 2 or 3,
dadurch gekennzeichnet, dass zwischen einer Innenseite des Überlapps (8) und der Unterwasserfläche (7) der Antriebseinheit (3) ein lösbares Befestigungsmittel angeordnet ist.  characterized in that between a inside of the overlap (8) and the underwater surface (7) of the drive unit (3), a releasable fastening means is arranged.
5. Surfboard nach einem der Ansprüche 1 bis 4, 5. Surfboard according to one of claims 1 to 4,
dadurch gekennzeichnet, dass eine Befestigungslinie zwischen dem Überlapp (8) und dem Rumpfbauteil (2) vorgesehen ist und ein Nennmaß der Befestigungslinie des Rumpfbauteils (2) größer ist als ein Nennmaß der Befestigungslinie des Überlapps (8).  characterized in that an attachment line is provided between the overlap (8) and the body member (2) and a nominal dimension of the attachment line of the body member (2) is greater than a nominal dimension of the attachment line of the overlap (8).
6. Surfboard nach einem der Ansprüche 1 bis 5, 6. Surfboard according to one of claims 1 to 5,
dadurch gekennzeichnet, dass der Überlapp (8) zum heckseitigen Ende hin offen ist.  characterized in that the overlap (8) is open towards the rear end.
7. Surfboard nach einem der Ansprüche 1 bis 6, 7. Surfboard according to one of claims 1 to 6,
dadurch gekennzeichnet, dass der Überlapp (8) am in einer Fahrtrichtung (F) vorlaufenden Rand zur Unterwasserfläche (7) hin abgeschrägt ausgebildet ist.  characterized in that the overlap (8) is beveled at the leading edge in a direction of travel (F) to the underwater surface (7).
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US10946939B1 (en) 2020-04-22 2021-03-16 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11091232B1 (en) 2020-04-22 2021-08-17 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11801919B2 (en) 2020-04-22 2023-10-31 Kai Concepts, LLC Waterproof container having a waterproof electrical connector
US11897583B2 (en) 2020-04-22 2024-02-13 Kai Concepts, LLC Watercraft device with hydrofoil and electric propulsion system
US11485457B1 (en) 2021-06-14 2022-11-01 Kai Concepts, LLC Hydrojet propulsion system
US11878775B2 (en) 2021-07-13 2024-01-23 Kai Concepts, LLC Leash system and methods of use

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HRP20221062T1 (en) 2022-11-11
IL275553A (en) 2020-08-31
EP3978349A1 (en) 2022-04-06
EP3529142B1 (en) 2022-07-27
AU2018390900A1 (en) 2020-07-09
US11472515B2 (en) 2022-10-18
CN111527025A (en) 2020-08-11
US20210024180A1 (en) 2021-01-28
AU2018390900B9 (en) 2023-05-25
WO2019122098A1 (en) 2019-06-27
DE102017130959A1 (en) 2019-06-27
MX2020006555A (en) 2020-11-24
AU2018390900B2 (en) 2021-12-23
ES2926631T3 (en) 2022-10-27

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