EP3041735A1 - Water sport device having a fin - Google Patents

Water sport device having a fin

Info

Publication number
EP3041735A1
EP3041735A1 EP14789137.8A EP14789137A EP3041735A1 EP 3041735 A1 EP3041735 A1 EP 3041735A1 EP 14789137 A EP14789137 A EP 14789137A EP 3041735 A1 EP3041735 A1 EP 3041735A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
fin
water
surfboard
water sports
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
EP14789137.8A
Other languages
German (de)
French (fr)
Other versions
EP3041735B1 (en
Inventor
Benjamin Köhnsen
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
Sashay 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 Sashay GmbH filed Critical Sashay GmbH
Publication of EP3041735A1 publication Critical patent/EP3041735A1/en
Application granted granted Critical
Publication of EP3041735B1 publication Critical patent/EP3041735B1/en
Priority to HRP20201625TT priority Critical patent/HRP20201625T1/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
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/10—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof
    • B63H11/107—Direction control of propulsive fluid
    • B63H11/113—Pivoted outlet
    • 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
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/64—Adjustable, e.g. by adding sections, by removing sections or by changing orientation or profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor

Definitions

  • the invention relates to a water sports device with a seat or floor space for a water sportsman, a jet propulsion and a pivoting nozzle.
  • Water sports equipment with a jet propulsion and swiveling nozzle are known in the form of jet skis or surfboards, the latter for example from DE 20 2011 051 071.
  • the controllable surfboard shown in the latter utility model has a surfboard, in which a jet propulsion system is integrated.
  • the jet propulsion system has a swiveling nozzle for water sucked in on an underwater surface of the surfboard. By pivoting the nozzle, the surfboard can be maneuvered into a right or left turn.
  • the control of the nozzle can be done via a held in the hand of the water sports controller or by a arranged in the surfboard gyrosensor. In the second case, the feed is controlled by a manual control.
  • a disadvantage of the known water sports equipment is the fact that during cornering can no longer be controlled when the feed of the jet propulsion is too low or off. The water sports equipment then performs only a lateral drift movement.
  • the invention makes use of the idea, in addition to the jet propulsion, which allows cornering by pivoting the nozzle during operation to provide a pivoting fin that allows cornering even when the jet propulsion is not or not sufficiently strong in operation and from the Jet of jet propulsion no water is spurted out.
  • an axis of rotation is provided around which the nozzle is pivotally mounted and about which the fin is pivotally mounted.
  • the fin and the nozzle are conveniently connected to each other and fixed to each other positionally fixed, and a pivoting device of the nozzle is also the pivoting device of the fin.
  • the Finn is in Operation immersed in the water. Even if there is no propulsion through the nozzle, steering of the water sports equipment is still possible by the fin immersed in the water.
  • a standing or sitting surface is provided for the water sportsman, and the axis of rotation is arranged perpendicular to the standing or sitting surface. Under a sitting or standing area is here very general to understand a device on which the water sports is during the exercise of the sport.
  • the invention relates to water sports equipment generally with a jet propulsion. This can be understood as surfboards in which a jet propulsion system is integrated, but also conventional jet skis with a jet propulsion system.
  • the fin has a rear control surface arranged in the direction of travel of the water sports device behind the axis of rotation and a front control surface arranged in front of the axis of rotation in the direction of travel.
  • the two control surfaces together form the control surface of the fin.
  • the axis of rotation is not along outer edges or completely outside of the control surface, but is guided from the outer edges of the fins inwardly spaced through the control surface of the fin, when crossing the fin on both control surfaces exerted a mutually canceling torque, so that the force acting on the pivot control of the fin and the nozzle is minimized.
  • the fin is attached by means of nylon screws on a water side of the nozzle.
  • the fin is fixed on the one hand by means of a nylon screw directly to the axis of rotation and on the other hand by means of another nylon screw directly on the water side of the nozzle.
  • Nylon screws are available inexpensively and, even if they should break, can be replaced quickly and easily.
  • the nylon screws are designed as a predetermined breaking point of the fin, so that, even if the water sports equipment is drawn with its underside of water on sand or in very shallow water and the fin should break, the
  • FIG. 1 is a plan view of an inventive surfboard
  • Fig. 2 is a bottom view of the surfboard in Fig. 1
  • Fig. 3 is a sectional view of the rear of the surfboard in Figs. 1 and 2.
  • the invention will be described with reference to the surf board 1, but it is not limited to a surf board. It is also conceivable to transfer the invention to other water sports equipment, in particular jet skis.
  • the surfboard 1 according to the invention in Fig. 1 shows a horizontally arranged in operation platform 2 for a water sports.
  • a bow 3 of the surfboard 1 which is arranged in Fig. 1 right, an eyelet 4 is provided for a tether 6.
  • a controller 7 is festgeknotet.
  • the controller 7 comprises a wireless radio link or a Bowden cable or a cable connection to a drive integrated in the surfboard 8.
  • the radio link is shown by the dashed line.
  • a foot strap 9 is fixed on the base 2 of the surfboard 1.
  • the water sportsman can put a foot in the ankle strap 9 to exercise the sport and grab and hold the controller 7 with one hand and get through the tether 6 additional support on the surfboard 1.
  • the controller 7 is used in this case only to control the strength of the propulsion of the surfboard, so the speed of the surfboard 1.
  • the controller may include a gyroscope function, so that the propulsion is changed by a tilting movement or as a lever, a kind of joystick executed becomes.
  • a gyrosensor 11 which registers tilting movements about a longitudinal direction L of the surfboard 1.
  • the gyroscope 11 is connected to a pivoting device 2, 17, 18, which acts on a nozzle 13 arranged in a tail 14 and pivots the nozzle 13 in a plane parallel to the base 2.
  • the pivot drive comprises an arm 13 arranged on the nozzle 13, on which an actuating rod 18 is articulated.
  • the control rod 18 is connected to a servo motor 12.
  • the servomotor 12 allows retraction and extension of the control rod 18, so that via the arm 17, a pivoting movement of the nozzle 13 in Fig. 1 in the drawing plane can be performed.
  • Fig. 2 shows the surfboard 1 in Fig. 1 in a view from below.
  • an underwater surface 16 of the surfboard 1 is shown.
  • the underwater surface 16 has an inlet 19 for the water.
  • To generate the propulsion water as shown in FIG. 3, sucked on the underwater surface 16 of the surfboard 1 and accelerated mitteis a propeller 21 and pushed out of the nozzle 13.
  • the surfboard 1 can drive a right or left turn.
  • Fig. 3 shows the tail 4 of the surfboard 1 in Figs. 1 and 2 in a sectional view.
  • water is drawn in through the inlet 19 at the underwater surface 16 and accelerated by means of the propeller 21, which is provided in a water channel between the inlet 19 and the nozzle 13 and pushed out of the nozzle 13.
  • the propulsion of the surfboard 1 consists of the recoil formed by the ejection.
  • the nozzle 13 is pivotally mounted about a rotation axis D at the rear 14 of the surfboard 1 and closes the water channel from the rear side.
  • a fin 23 is attached to the nozzle 13.
  • the fin 23 is pivotable with the nozzle 13.
  • the fin 23 is screwed on the one hand with a nylon screw 22a to the rotation axis D of the nozzle 13 and screwed on the other at a further point with a water side of the nozzle 13 by means of another nylon screw 22b.
  • the fixation on the nozzle 13 of the jet drive can also take place by means of a shape of the fin 23 adapted to the nozzle 13.
  • the fin 23 may have an approximately U-profile-shaped receptacle on its side facing away from the water, which is clipped to the nozzle 13.
  • the fin 23 can also encase the nozzle 13 otherwise.
  • the fin 23 performs about the same axis of rotation D as the nozzle 13, the pivoting movement of the nozzle 13 from.
  • the nozzle 3 has a rear control surface 23a arranged behind the rotation axis D in the direction of travel of the surfboard 1 and a front control surface 23b arranged in front of the rotation axis D in the direction of travel.
  • the two control surfaces 23a, 23b form the entire control surface of the fin 23.
  • the fin 23 makes it possible to perform a controlled cornering, even if the jet drive generates no propulsion, so no water is ejected from the nozzle 13.
  • the fin 23 is supported by two further fins 24a, 24b according to FIG. 2, which additionally stabilize the travel of the surfboard 1 and generate an additional buoyancy due to their outwardly curved shape.

Abstract

The invention relates to a water sport device having a sitting or standing surface (2) for a person practicing water sports, a jet drive (8) and a pivotable nozzle (13), wherein a fin (23) is disposed at the nozzle (13) and is arranged in a fixed position relative to said nozzle.

Description

Wassersportgerät mit Finne  Water sports equipment with fin
Die Erfindung betrifft ein Wassersportgerät mit einer Sitz- oder Standfläche für einen Wassersportler, einem Jetantrieb und einer schwenkbaren Düse. The invention relates to a water sports device with a seat or floor space for a water sportsman, a jet propulsion and a pivoting nozzle.
Wassersportgeräte mit einem Jetantrieb und schwenkbarer Düse sind in Form von Jetski oder von Surfbrettern, letztere beispielsweise aus der DE 20 2011 051 071 bekannt. Das in der letztgenannten Gebrauchsmusterschrift dargestellte steuerbare Surfbrett weist ein Surfbrett auf, in das ein Jetantrieb integriert ist. Der Jetantrieb verfügt über eine schwenkbare Düse für an einer Unterwasserfläche des Surfbrettes angesaugtes Wasser. Durch Verschwenken der Düse kann das Surfbrett in eine Rechts- oder Linkskurvenfahrt manövriert werden. Die Steuerung der Düse kann über eine in der Hand des Wassersportlers gehaltene Steuerung oder durch einen im Surfbrett angeordneten Gyrosensor erfolgen. Im zweiten Fall wird der Vorschub durch eine manuelle Steuerung gesteuert. Water sports equipment with a jet propulsion and swiveling nozzle are known in the form of jet skis or surfboards, the latter for example from DE 20 2011 051 071. The controllable surfboard shown in the latter utility model has a surfboard, in which a jet propulsion system is integrated. The jet propulsion system has a swiveling nozzle for water sucked in on an underwater surface of the surfboard. By pivoting the nozzle, the surfboard can be maneuvered into a right or left turn. The control of the nozzle can be done via a held in the hand of the water sports controller or by a arranged in the surfboard gyrosensor. In the second case, the feed is controlled by a manual control.
Nachteilig an dem bekannten Wassersportgerät ist die Tatsache, dass während einer Kurvenfahrt nicht mehr gesteuert werden kann, wenn der Vorschub des Jetantriebs zu gering oder ausgeschaltet ist. Das Wassersportgerät führt dann lediglich eine seitliche Driftbewegung aus. A disadvantage of the known water sports equipment is the fact that during cornering can no longer be controlled when the feed of the jet propulsion is too low or off. The water sports equipment then performs only a lateral drift movement.
Es ist daher Aufgabe der vorliegenden Erfindung, ein Wassersportgerät der eingangs genannten Art zur Verfügung zu stellen, das eine verbesserte Kurvenfahrt ermöglicht. It is therefore an object of the present invention to provide a water sports device of the type mentioned above, which allows improved cornering.
Die Aufgabe wird durch ein eingangs genanntes Wassersportgerät mit den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. The object is achieved by an aforementioned water sports device with the characterizing features of claim 1.
Die Erfindung macht von der Idee Gebrauch, zusätzlich zum Jetantrieb, der während des Betriebs eine Kurvenfahrt durch Verschwenken der Düse ermöglicht, eine verschwenkbare Finne vorzusehen, die die Kurvenfahrt auch dann ermöglicht, wenn der Jetantrieb nicht oder nicht hinreichend stark in Betrieb ist und aus der Düse des Jetantriebs kein Wasser herausgespritzt wird. The invention makes use of the idea, in addition to the jet propulsion, which allows cornering by pivoting the nozzle during operation to provide a pivoting fin that allows cornering even when the jet propulsion is not or not sufficiently strong in operation and from the Jet of jet propulsion no water is spurted out.
Günstigerweise ist eine Drehachse vorgesehen, um die die Düse schwenkbar angeordnet ist und um die auch die Finne schwenkbar angeordnet ist. Die Finne und die Düse sind günstigerweise miteinander und zueinander positionsfest verbunden, und eine Schwenkeinrichtung der Düse ist auch die Schwenkeinrichtung der Finne. Die Finne ist im Betrieb in das Wasser eingetaucht. Selbst wenn kein Vortrieb durch die Düse erfolgt, ist immer noch durch die in das Wasser eingetauchte Finne eine Lenkung des Wassersportgerätes möglich. In einer bevorzugten Ausführungsform der Erfindung ist eine Steh- oder Sitzfläche für den Wassersportler vorgesehen, und die Drehachse ist senkrecht zur Steh- oder Sitzfläche angeordnet. Unter einer Sitz- oder Stehfläche ist hier sehr allgemein eine Einrichtung zu verstehen, auf der sich der Wassersportler während der Ausübung des Sportes befindet. Die Erfindung bezieht sich auf Wassersportgeräte im Allgemeinen mit einem Jetantrieb. Darunter können Surfbretter verstanden werden, in die ein Jetantrieb integriert ist, aber auch herkömmliche Jetski mit einem Jetantrieb. Conveniently, an axis of rotation is provided around which the nozzle is pivotally mounted and about which the fin is pivotally mounted. The fin and the nozzle are conveniently connected to each other and fixed to each other positionally fixed, and a pivoting device of the nozzle is also the pivoting device of the fin. The Finn is in Operation immersed in the water. Even if there is no propulsion through the nozzle, steering of the water sports equipment is still possible by the fin immersed in the water. In a preferred embodiment of the invention, a standing or sitting surface is provided for the water sportsman, and the axis of rotation is arranged perpendicular to the standing or sitting surface. Under a sitting or standing area is here very general to understand a device on which the water sports is during the exercise of the sport. The invention relates to water sports equipment generally with a jet propulsion. This can be understood as surfboards in which a jet propulsion system is integrated, but also conventional jet skis with a jet propulsion system.
In einer weiteren bevorzugten Ausführungsform der Erfindung weist die Finne eine in Fahrtrichtung des Wassersportgerätes hinter der Drehachse angeordnete hintere Steuerfläche und eine in Fahrtrichtung vor der Drehachse angeordnete vordere Steuerfläche auf. Die beiden Steuerflächen bilden zusammen die Steuerfläche der Finne aus. Dadurch, dass die Drehachse nicht entlang äußerer Ränder oder vollständig außerhalb der Steuerfläche verläuft, sondern von den äußeren Rändern der Finnen nach innen beabstandet durch die Steuerfläche der Finne hindurchgeführt ist, wird beim Querstellen der Finne auf beide Steuerflächen ein sich gegenseitig aufhebendes Drehmoment ausgeübt, so dass die auf die Schwenksteuerung der Finne und der Düse wirkende Kraft minimiert wird. In a further preferred embodiment of the invention, the fin has a rear control surface arranged in the direction of travel of the water sports device behind the axis of rotation and a front control surface arranged in front of the axis of rotation in the direction of travel. The two control surfaces together form the control surface of the fin. Characterized in that the axis of rotation is not along outer edges or completely outside of the control surface, but is guided from the outer edges of the fins inwardly spaced through the control surface of the fin, when crossing the fin on both control surfaces exerted a mutually canceling torque, so that the force acting on the pivot control of the fin and the nozzle is minimized.
Günstigerweise ist die Finne mittels Nylonschrauben an einer Wasserseite der Düse befestigt. Die Finne ist zum einen mittels einer Nylonschraube direkt an der Drehachse und zum anderen mittels einer weiteren Nylonschraube direkt an der Wasserseite der Düse befestigt.Conveniently, the fin is attached by means of nylon screws on a water side of the nozzle. The fin is fixed on the one hand by means of a nylon screw directly to the axis of rotation and on the other hand by means of another nylon screw directly on the water side of the nozzle.
Nylonschrauben sind kostengünstig erhältlich und können, auch wenn sie brechen sollten, schnell und einfach ersetzt werden. Die Nylonschrauben sind gleichsam als Sollbruchstellen der Finne ausgebildet, so dass, auch wenn das Wassersportgerät mit seiner Wasserunterseite auf Sand gezogen wird oder in sehr flachem Wasser fährt und die Finne abbrechen sollte, dieNylon screws are available inexpensively and, even if they should break, can be replaced quickly and easily. The nylon screws are designed as a predetermined breaking point of the fin, so that, even if the water sports equipment is drawn with its underside of water on sand or in very shallow water and the fin should break, the
Finne selbst eben nicht beschädigt wird, sondern sie bricht an den beiden kostengünstigen ersetzbaren Nylonschrauben von der Düse ab. Fin itself is not damaged, but it breaks off at the two inexpensive replaceable nylon screws from the nozzle.
Die Erfindung wird anhand eines Ausführungsbeispiels in drei Figuren beschrieben. Dabei zeigen: The invention will be described with reference to an embodiment in three figures. Showing:
Fig. 1 eine Draufsicht auf ein erfindungsgemäßes Surfbrett, Fig. 2 eine Untenansicht des Surbrettes in Fig. 1 , 1 is a plan view of an inventive surfboard, Fig. 2 is a bottom view of the surfboard in Fig. 1,
Fig. 3 eine Schnittansicht des Hecks des Surfbrettes in den Fign. 1 und 2. Fig. 3 is a sectional view of the rear of the surfboard in Figs. 1 and 2.
Die Erfindung wird anhand des Surf brettes 1 beschrieben, sie ist jedoch nicht auf ein Surf brett beschränkt. Es ist auch denkbar, die Erfindung auf andere Wassersportgeräte, insbesondere auf Jetski zu übertragen. The invention will be described with reference to the surf board 1, but it is not limited to a surf board. It is also conceivable to transfer the invention to other water sports equipment, in particular jet skis.
Das erfindungsgemäße Surfbrett 1 in Fig. 1 zeigt eine im Betrieb horizontal angeordnete Standfläche 2 für einen Wassersportler. An einem Bug 3 des Surfbrettes 1 , der in Fig. 1 rechts angeordnet ist, ist eine Öse 4 für ein Halteseil 6 vorgesehen. In die Öse 4 ist ein Ende des Halteseils 6 eingeknotet. An einem anderen Ende des Halteseils 6 ist eine Steuerung 7 festgeknotet. Die Steuerung 7 umfasst eine drahtlose Funkverbindung oder einen Bowdenzug oder eine Verbindung mit Kabel zu einem im Surfbrett integrierten Antrieb 8. Die Funkverbindung ist durch die gestrichelte Line dargestellt. Des Weiteren ist eine Fußschlaufe 9 auf der Standfläche 2 des Surfbrettes 1 befestigt. Der Wassersportler kann zur Ausübung des Sportes einen Fuß in die Fußschlaufe 9 stecken und mit einer Hand die Steuerung 7 greifen und halten und durch das Halteseil 6 zusätzlichen Halt auf dem Surfbrett 1 bekommen. Die Steuerung 7 dient in diesem Fall lediglich zur Steuerung der Stärke des Vortriebs des Surfbrettes, also der Geschwindigkeit des Surfbrettes 1. Die Steuerung kann eine Gyroskopfunktion umfassen, so dass der Vortrieb über eine Kippbewegung verändert wird oder als ein Hebel, eine Art Joystick, ausgeführt wird. The surfboard 1 according to the invention in Fig. 1 shows a horizontally arranged in operation platform 2 for a water sports. At a bow 3 of the surfboard 1, which is arranged in Fig. 1 right, an eyelet 4 is provided for a tether 6. In the eyelet 4 one end of the tether 6 is knotted. At another end of the tether 6, a controller 7 is festgeknotet. The controller 7 comprises a wireless radio link or a Bowden cable or a cable connection to a drive integrated in the surfboard 8. The radio link is shown by the dashed line. Furthermore, a foot strap 9 is fixed on the base 2 of the surfboard 1. The water sportsman can put a foot in the ankle strap 9 to exercise the sport and grab and hold the controller 7 with one hand and get through the tether 6 additional support on the surfboard 1. The controller 7 is used in this case only to control the strength of the propulsion of the surfboard, so the speed of the surfboard 1. The controller may include a gyroscope function, so that the propulsion is changed by a tilting movement or as a lever, a kind of joystick executed becomes.
Im Surfbrett ist ein Gyrosensor 11 vorgesehen, der Kippbewegungen um eine Längsrichtung L des Surfbrettes 1 registriert. Der Gyrosensor 11 ist mit einer Schwenkeinrichtung 2, 17, 18 verbunden, die auf eine in einem Heck 14 angeordnete Düse 13 wirkt und die Düse 13 in einer Ebene parallel zur Standfläche 2 verschwenkt. In the surfboard, a gyrosensor 11 is provided which registers tilting movements about a longitudinal direction L of the surfboard 1. The gyroscope 11 is connected to a pivoting device 2, 17, 18, which acts on a nozzle 13 arranged in a tail 14 and pivots the nozzle 13 in a plane parallel to the base 2.
Der Schwenkantrieb umfasst einen an der Düse 13 angeordneten Arm 17, an dem eine Stellstange 18 angelenkt ist. Die Stellstange 18 ist mit einem Servomotor 12 verbunden. Der Servomotor 12 ermöglicht ein Ein- und Ausfahren der Stellstange 18, sodass über den Arm 17 eine Schwenkbewegung der Düse 13 in Fig. 1 in der Zeichenebene durchgeführt werden kann. Fig. 2 zeigt das Surfbrett 1 in Fig. 1 in einer Ansicht von unten. In Fig. 2 ist eine Unterwasserfläche 16 des Surfbrettes 1 dargestellt. Die Unterwasserfläche 16 weist einen Einlass 19 für das Wasser auf. Zur Erzeugung des Vortriebs wird Wasser, gemäß Fig. 3, an der Unterwasserfläche 16 des Surfbrettes 1 angesaugt und mitteis eines Propellers 21 beschleunigt und aus der Düse 13 herausgestoßen. Je nachdem in welche Position die Düse 13 geschwenkt ist, kann das Surfbrett 1 eine Rechts- oder Linkskurve fahren. The pivot drive comprises an arm 13 arranged on the nozzle 13, on which an actuating rod 18 is articulated. The control rod 18 is connected to a servo motor 12. The servomotor 12 allows retraction and extension of the control rod 18, so that via the arm 17, a pivoting movement of the nozzle 13 in Fig. 1 in the drawing plane can be performed. Fig. 2 shows the surfboard 1 in Fig. 1 in a view from below. In Fig. 2, an underwater surface 16 of the surfboard 1 is shown. The underwater surface 16 has an inlet 19 for the water. To generate the propulsion water, as shown in FIG. 3, sucked on the underwater surface 16 of the surfboard 1 and accelerated mitteis a propeller 21 and pushed out of the nozzle 13. Depending on the position in which the nozzle 13 is pivoted, the surfboard 1 can drive a right or left turn.
Fig. 3 zeigt das Heck 4 des Surfbrettes 1 in den Fign. 1 und 2 in einer Schnittansicht. Während des Betriebs wird Wasser durch den Einlass 19 an der Unterwasserfläche 16 eingesaugt und mittels des Propellers 21 , der in einem Wasserkanal zwischen Einlass 19 und der Düse 13 vorgesehen ist, beschleunigt und aus der Düse 13 herausgedrückt. Der Vortrieb des Surfbrettes 1 besteht aus dem sich durch das Herausstoßen bildenden Rückstoß. Die Düse 13 ist schwenkbar um eine Drehachse D am Heck 14 des Surfbrettes 1 montiert und schließt den Wasserkanal heckseitig ab. Wasserseitig der Düse 13 ist eine Finne 23 an der Düse 13 befestigt. Die Finne 23 ist mit der Düse 13 schwenkbar. Die Finne 23 ist zum einen mit einer Nylonschraube 22a an der Drehachse D der Düse 13 festgeschraubt und zum anderen an einem weiteren Punkt mit einer Wasserseite der Düse 13 mittels einerweiteren Nylonschraube 22b verschraubt. Statt einer weiteren Nylonschraube 22b kann die Fixierung an der Düse 13 des Jetantriebes auch durch eine an den Düse 13 angepasste Form der Finne 23 erfolgen. Beispielsweise kann die Finne 23 eine etwa U-profilförmige Aufnahme an ihrer Wasser abgewandten Seite aufweisen, die an die Düse 13 geklackt wird. Die Finne 23 kann die Düse 13 auch anderweitig ummanteln. Fig. 3 shows the tail 4 of the surfboard 1 in Figs. 1 and 2 in a sectional view. During operation, water is drawn in through the inlet 19 at the underwater surface 16 and accelerated by means of the propeller 21, which is provided in a water channel between the inlet 19 and the nozzle 13 and pushed out of the nozzle 13. The propulsion of the surfboard 1 consists of the recoil formed by the ejection. The nozzle 13 is pivotally mounted about a rotation axis D at the rear 14 of the surfboard 1 and closes the water channel from the rear side. On the water side of the nozzle 13, a fin 23 is attached to the nozzle 13. The fin 23 is pivotable with the nozzle 13. The fin 23 is screwed on the one hand with a nylon screw 22a to the rotation axis D of the nozzle 13 and screwed on the other at a further point with a water side of the nozzle 13 by means of another nylon screw 22b. Instead of a further nylon screw 22b, the fixation on the nozzle 13 of the jet drive can also take place by means of a shape of the fin 23 adapted to the nozzle 13. For example, the fin 23 may have an approximately U-profile-shaped receptacle on its side facing away from the water, which is clipped to the nozzle 13. The fin 23 can also encase the nozzle 13 otherwise.
Die Finne 23 führt um dieselbe Drehachse D wie die Düse 13 die Schwenkbewegung der Düse 13 mit aus. Die Düse 3 weist eine in Fahrtrichtung des Surfbrettes 1 hinter der Drehachse D angeordnete hintere Steuerfläche 23a und eine in Fahrtrichtung vor der Drehachse D angeordnete vordere Steuerfläche 23b auf. Die beiden Steuerflächen 23a, 23b bilden die gesamte Steuerfläche der Finne 23 aus. Beim Schrägstellen der Finne 23 im Wasser während der Kurvenfahrt wird somit eine Kraft sowohl auf die hintere 23a als auch auf die vordere Steuerfläche 23b ausgeübt, und die sich dadurch bildenden Drehmomente auf die Drehachse D heben sich im Wesentlichen gegenseitig vollständig auf. Dadurch muss der die Schwenkbewegung ausführende Servomotor 12 weniger Kraft aufwenden, um die Schwenkbewegung auszuführen. Die Finne 23 ermöglicht es, eine gesteuerte Kurvenfahrt durchzuführen, auch wenn der Jetantrieb keinen Vortrieb erzeugt, also kein Wasser aus der Düse 13 herausgespritzt wird. Unterstützt wird die Finne 23 durch zwei weitere Finnen 24a, 24b gemäß Fig. 2, die zusätzlich die Fahrt des Surfbrettes 1 stabilisieren und aufgrund ihrer nach außen gebogenen Form einen zusätzlichen Auftrieb erzeugen. The fin 23 performs about the same axis of rotation D as the nozzle 13, the pivoting movement of the nozzle 13 from. The nozzle 3 has a rear control surface 23a arranged behind the rotation axis D in the direction of travel of the surfboard 1 and a front control surface 23b arranged in front of the rotation axis D in the direction of travel. The two control surfaces 23a, 23b form the entire control surface of the fin 23. As the fin 23 is tilted in the water during cornering, a force is thus exerted on both the rear 23a and the front control surface 23b, and the torques on the rotation axis D that arise thereby substantially cancel each other out completely. As a result, the servomotor 12, which carries out the pivoting movement, must expend less force in order to carry out the pivoting movement. The fin 23 makes it possible to perform a controlled cornering, even if the jet drive generates no propulsion, so no water is ejected from the nozzle 13. The fin 23 is supported by two further fins 24a, 24b according to FIG. 2, which additionally stabilize the travel of the surfboard 1 and generate an additional buoyancy due to their outwardly curved shape.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Surfbrett 1 surfboard
2 Standfläche  2 floor space
3 Bug 3 bug
4 Öse  4 eyelet
6 Halteseil 6 guy rope
7 Steuerung  7 control
8 Antrieb 8 drive
9 Fußschlaufe  9 foot loop
1 1 Gyrosensor 1 1 gyrosensor
12 Schwenkeinrichtung Servomotor 13 Düse  12 Swiveling device servomotor 13 nozzle
14 Heck  14 stern
16 Unterwasserfläche 16 underwater area
17 Arm der Schwenkeinrichtung 18 Stellstange der Schwenkeinrichtung 17 Arm of the swiveling device 18 Control rod of the swiveling device
19 Einlass 19 inlet
21 Propeller 21 propellers
22a Nylonschraube  22a nylon screw
22b weitere Nylonschraube 22b further nylon screw
23 Finne  23 fin
23a hintere Steuerfläche  23a rear control surface
23b vordere Steuerfläche  23b front control surface
24a weitere Finne  24a more Finn
24b weitere Finne 24b more Finn
L Längsrichtung L longitudinal direction
D Drehachse D rotation axis

Claims

Patentansprüche claims
1. Wassersportgerät mit 1. Water sports equipment with
einer Sitz- oder Standfläche (2) für einen Wassersportler  a sitting or standing surface (2) for a water sportsman
einem Jetantrieb (8) ,  a jet engine (8),
einer schwenkbaren Düse (13),  a pivotable nozzle (13),
gekennzeichnet durch eine an der Düse (13) und relativ zur Düse (13) positionsfest angeordnete Finne (23).  characterized by a on the nozzle (13) and relative to the nozzle (13) fixedly disposed fin (23).
2. Wassersportgerät nach Anspruch 1 , 2. Water sports equipment according to claim 1,
gekennzeichnet durch eine Drehachse (D), um die die Düse (13) schwenkbar angeordnet ist und um die auch die Finne (23) schwenkbar angeordnet ist.  characterized by a rotation axis (D) about which the nozzle (13) is pivotally mounted and about which the fin (23) is pivotally mounted.
3. Wassersportgerät nach Anspruch 1 oder 2, 3. Water sports equipment according to claim 1 or 2,
gekennzeichnet durch eine Sitz- oder Standfläche (2) für den Wassersportler und dadurch, dass die Drehachse (D) senkrecht zur Sitz- oder Standfläche (2) angeordnet ist.  characterized by a sitting or standing surface (2) for the water sports person and in that the axis of rotation (D) is arranged perpendicular to the sitting or standing surface (2).
4. Wassersportgerät nach Anspruch 1 , 2 oder 3, 4. Water sports equipment according to claim 1, 2 or 3,
dadurch gekennzeichnet, dass die Finne (23) eine in Fahrtrichtung des  characterized in that the fin (23) in the direction of travel of the
Wassersportgerätes hinter der Drehachse (D) angeordnete hintere Steuerfläche (23a) und eine in Fahrtrichtung vor der Drehachse (D) angeordnete vordere  Wassersportgerätes behind the axis of rotation (D) arranged rear control surface (23a) and in the direction of travel in front of the axis of rotation (D) arranged front
Steuerfläche (23b) aufweist.  Control surface (23b) has.
5. Wassersportgerät nach Anspruch 4, 5. Water sports equipment according to claim 4,
dadurch gekennzeichnet, dass die Finne (23) mittels Nylonschrauben (22a, 22b) an einer Wasserseite der Düse (13) befestigt ist.  characterized in that the fin (23) by means of nylon screws (22a, 22b) is attached to a water side of the nozzle (13).
EP14789137.8A 2013-09-04 2014-09-02 Surfboard having a fin Active EP3041735B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20201625TT HRP20201625T1 (en) 2013-09-04 2020-10-08 Surfboard having a fin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202013103977U DE202013103977U1 (en) 2013-09-04 2013-09-04 Water sports equipment with fin
PCT/DE2014/100314 WO2015032387A1 (en) 2013-09-04 2014-09-02 Water sport device having a fin

Publications (2)

Publication Number Publication Date
EP3041735A1 true EP3041735A1 (en) 2016-07-13
EP3041735B1 EP3041735B1 (en) 2020-08-12

Family

ID=49384944

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Application Number Title Priority Date Filing Date
EP14789137.8A Active EP3041735B1 (en) 2013-09-04 2014-09-02 Surfboard having a fin

Country Status (6)

Country Link
US (1) US9845138B2 (en)
EP (1) EP3041735B1 (en)
DE (2) DE202013103977U1 (en)
ES (1) ES2827674T3 (en)
HR (1) HRP20201625T1 (en)
WO (1) WO2015032387A1 (en)

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US10940917B2 (en) 2016-09-12 2021-03-09 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US10946939B1 (en) 2020-04-22 2021-03-16 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
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
US11897583B2 (en) 2020-04-22 2024-02-13 Kai Concepts, LLC Watercraft device with hydrofoil and electric propulsion system

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Publication number Priority date Publication date Assignee Title
US10940917B2 (en) 2016-09-12 2021-03-09 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US11479324B2 (en) 2016-09-12 2022-10-25 Kai Concepts, LLP Watercraft device with hydrofoil and electric propeller system
US11919608B2 (en) 2016-09-12 2024-03-05 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
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

Also Published As

Publication number Publication date
HRP20201625T1 (en) 2020-12-25
ES2827674T3 (en) 2021-05-24
DE202013103977U1 (en) 2013-09-18
US20160207601A1 (en) 2016-07-21
DE112014004033A5 (en) 2016-08-04
US9845138B2 (en) 2017-12-19
EP3041735B1 (en) 2020-08-12
WO2015032387A1 (en) 2015-03-12

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