WO2013091603A1

WO2013091603A1 - Water-sports equipment item

Info

Publication number: WO2013091603A1
Application number: PCT/DE2012/001207
Authority: WO
Inventors: Nikolaus GÄDEKE
Original assignee: Gaedeke Nikolaus
Priority date: 2011-12-22
Filing date: 2012-12-17
Publication date: 2013-06-27
Also published as: DE112012005440A5; DE102011122015A1

Abstract

The invention relates to a water-sports equipment item (1) having two elongate, narrow float bodies (2) which can glide on the water and have means (16) for foot fastening which are attached to the upper side of each float body (2). A user (17) of the water-sports equipment item (1) stands with in each case one foot on a float body (2). In each case one foot plate (15) with means (16) for foot fastening is formed on the upper side of each float body (2). The foot plate (15) is formed in the longitudinal direction of the float body (8) in a position which is such that the weight (F_G) of a user (17) standing upright in each case with one foot on the foot plate (15) of a float body (2) acts between 1 cm and 30 cm behind the centroid (14) of the float body (2) in relation to the movement direction (5) of the water-sports equipment item (1). The means (16) for foot fastening are therefore positioned on the foot plate (15) in such a way that the above-mentioned condition of the position of the action of the weight (F_G) of the user (17) standing upright on the foot plates (15) is met. Furthermore, it is essential for the invention that each float body (2) is formed in such a way that the buoyancy force (F_A) thereof is equal to or up to 10% less than or greater than half the weight (F_G) of the user (17), and that a flipper (6) which can be pivoted counter to the force of a spring about an axis which lies parallel to the transverse axis (9) of the float body (2) is arranged at the rear-side (in relation to the movement direction of the water-sports equipment item (1)) end of each float body (2). The user (17) produces a forward movement of the water-sports equipment item (1) by way of an alternating displacement of the body weight of said user (17) from one leg to the other and therefore alternate pressing of the rear-side ends of the float bodies (2) under the water. The flippers (6) which are attached at the rear-side ends of the float bodies (2) produce a forward movement of the water-sports equipment item (1) in the manner of a diver or flipper swimmer with the diver flippers thereof.

Description

Water sports equipment

The invention relates to a water sports device with two elongated, narrow, slidable on the water floats with at the top of each

Floating body attached means for Fuß fortig ung. A user of the water sports equipment stands with one foot on a float.

Water sports equipment having two elongated, narrow, floating on the water floats are known from the prior art.

In DE 4030225 C2 a two surfboards existing watercraft is described, which are connected by a frame together directionally stable so that forces and moments from the rolling and pitching movements of the surfboards are not introduced into the frame. For locomotion, a pedal crank drive is preferably mounted on the vessel, which is operatively connected to a drive screw or a paddle wheel. On the one hand, the vessel is bulky and, on the other hand, it allows only limited exercise by a user sitting on a seat mounted on the vessel operates the pedal drive.

In DE 34 11 263 C2, a water sports device with at least one easily slippery floating body and with a from the surface of the

Float described vertically upwardly extending holding device. To move the water sports equipment Fußpaddel are provided, which are alternately immersed in the water by the user standing on the water sports equipment. Described are various embodiments of the water sports equipment, as well as an existing two floats execution, which are summarized via a connecting device to a unit. The water sports equipment is difficult to operate and tends in training with just a float to tip over.

From DE 10014509 A1 a water sports equipment is known which consists of two long, narrow, paddle-boat-like Schwimmskiern, each of which has in its middle upper edge area a resiliently mounted vertically mounted footboard with Fußbefestigungen which acts on a arranged inside the Schwimmskis power transmission system, the protrudes into the water with a mechanically or hydraulically active drive element. By depressing a footboard, caused by a walking motion with a Person held to their feet in the foot mounts, a force driving the respective ski in its longitudinal direction is generated on the water.

The water sports equipment is structurally complex and requires for its operation a considerable skill. It tends to Umkipppen to a large extent.

The aim of the invention is a water sports equipment, which is structurally simple, allows the user an easy to learn while demanding sports activity and not tipping over. This object is achieved with a water sports device having the features of the first claim. Claims 2 to 7 describe advantageous embodiments of the water sports device according to the invention.

An inventive water sports equipment consists of two elongated, narrow, slidable on the water floats, on the upper sides of each foot plate are formed with means for foot mounting. The upper side is understood to be the side of the floating body that does not face the water. The aforementioned foot plate is formed in the longitudinal direction of the floating body in such a position that the weight of a person standing with one foot on the foot plate of a floating body user, based on the direction of travel of the water sports device between 1 cm to 30 cm, preferably between 10 cm to 20 cm, behind the center of gravity of the float. Relative to the sole of a foot resting on the foot plates of the two floats each with one foot, the position of the attack of the weight with sufficient for the function of the invention sufficient accuracy in the area center of the upstanding sole can be considered. The means for foot mounting are therefore positioned on the foot plate, that the above-mentioned condition of the position of the attack of the weight of standing on the foot plates user in the longitudinal direction of the floating body, based on the direction of travel of the water sports device between 1 cm to 30 cm, preferred between 10 cm to 20 cm behind the center of gravity of the floating body is met. Said foot fixing means may in the simplest case be a loop passing over the instep of a user's foot.

Essential for the invention is further that each float is designed so that its buoyancy force is equal to or up to 10% smaller or larger than half the weight of the user and that based on the direction of travel of the water sports equipment rear end of each float to one Parallel to the transverse axis of the float lying axis is arranged against the force of a spring pivoting fin.

Preferably, the fin is formed in the manner of the blade of a diving fin and fixedly arranged on the rear end of the float in the direction of travel of the watercraft, wherein the surface of the blade lies in the plane spanned by the longitudinal and the transverse axis of the floating body. The blade of a diving fin is spring-stiff, so that the not fixed to the float end, so the free end of the blade of the diver fin, with a sufficient force acting on the sheet transversely to the surface of the sheet elastically from the longitudinal and the transverse axis of the float swung out clamped plane. The spring stiffness of the blade acts as the spring force to be overcome by the force acting on the blade to cause a deflection of the free end of the blade of the diving fin. When reducing or eliminating the force acting on the sheet, the sheet returns due to its spring stiffness in its initial position in the plane defined by the longitudinal and the transverse axis of the float back plane.

In a preferred embodiment of the invention, the float is inflatable bar. He has in this training to achieve sufficient longitudinal rigidity and stability, an outer skeleton at least in the form of attached to the outer skin of the floating body, extending in the longitudinal direction struts. Of course, the struts can also be connected by frames, whereby the overall stability of the float is increased. An inflatable formation of the floating body allows a simple change of its displacement of water and thus its buoyancy force, which can thereby be easily adapted to the weight of the user. The length of a float should be correlated with the height of the user. For an adult, the length of a float should be between 1.80 m to 2.00 m. For smaller persons, e.g. Children, the length of a float can also be significantly shorter, e.g. 1, 00 m to 1, 20 m.

Also preferably, the attached to the top of the float base plate can be formed in the direction of the vertical axis of the float below the center of gravity of the float. By this arrangement engages the weight of the user in the direction of the height axis below the center of gravity of the float and a rolling motion of the float ^¬ body is avoided. In a particularly preferred embodiment of the invention, the two floating bodies of the water sports equipment in the front direction in the direction of travel, preferably in the first third, connected by a connecting rod, wherein the connection between the connecting rod and each

Float is made in each case via a two rotational degrees of freedom having joint, such that each float a pitching and a yawing, i. a rotation about a transverse and a vertical axis, can perform. A rolling motion, i. a rotation about a longitudinal axis is prevented by said connection of the two floating bodies.

Preferably, the connection of the connecting rod with the float at a distance which is between 10% to 35%, more preferably between 16% to 26% of the length of the float without fin, the tip of the float in the direction of the longitudinal axis of the float and in the Positioned by the longitudinal and the raised axis plane. Further preferably, the connecting rod can protrude beyond the floating body and can be arranged at the connecting rod ends laterally to the interconnected floating bodies in the form of jibs auxiliary floating body. This embodiment of the invention leads to a high positional stability of the watercraft in the water and also prevents an inexperienced user from tipping over the vessel in the event of swell and / or unfavorable movement and thus weight shifting by the user.

To use a prescribed water sports equipment this is first brought to water. The user places one foot each on the foot plate of a float and fastens his feet with the existing foot mounting means on the foot plates. He just turns and checks if his

Weight and buoyancy of the float are in predetermined relationship to each other. If this is the case, the floats carry the weight of the user, but dive so far into the water that the arranged at the rear end of the float fins are on the water surface or slightly below. To achieve a propulsive force of the user displaces a considerable part of his body weight on a leg, so that the rear-side part of the floating ^¬ body down, ie under water, is pressed. When Nachuntendrücken the rear-side part of the float with the fin attached to it creates an overpressure on the underside of the blade of the fin and a negative pressure at the top. On the blade of the fin, a force is exerted by the free end of the fin is pivoted out of the plane defined by the longitudinal and the transverse axis plane up. The water pressing against the underside of the blade flows towards the free end of the blade of the fin. At the same time, on the leaf of the fin one towards the

Longitudinal axis of the float, namely towards its tip, generates directed force that drives the water sports equipment forward. If the tail end of the float has reached its lowest point, so is not pushed further down, disappear the overpressure on the underside of the blade of the fin and the negative pressure on the top. The free end of the blade of the fin moves due to the spring stiffness of the fin in its initial position, ie it pivots back into the plane spanned by the longitudinal and the transverse axis plane. In this case, water is displaced from the underside of the sheet moving back into its starting position, the water flowing at least partially in the direction of the free end of the blade of the fin. On the blade of the fin acting in the direction of the longitudinal axis of the float, and to its tip, directed force that drives the water sports equipment further forward. If the user relieves the load of the floats pushed back under water by displacing his body weight away from this leg, the rear end of the float with the fin attached thereto is pushed upwards as a result of the buoyancy force. The pressures acting on the blade of the fin reverse, ie on its upper side creates an overpressure and on its underside a negative pressure. On the blade of the fin, a force is exerted by the free end of the fin is pivoted down. The water pressing against the top of the blade flows towards the free end of the blade of the fin. On the blade of the fin, a directed in the direction of the longitudinal axis of the float, namely towards its tip, generated force. The water sports equipment is driven further forward. If the float has reached a horizontal position and the rear end of the float so its highest point, the pressure differences on the top and bottom of the blade of the fin are reduced and the free end of the fin moves due to the spring stiffness of the fin in its initial position, ie it pivots back into the plane spanned by the longitudinal and the transverse axis. It is from the upper side of the sheet of the fin, which returns to its starting position, displaces water which at least partially flows in the direction of the free end of the blade of the fin. On the blade of the fin acting in the direction of the longitudinal axis of the float, and to its tip, directed force that drives the water sports equipment further forward. By shifting a significant portion of his body weight on the other leg of the process described is repeated with the other floating body. The user thus generates a forward movement of the water sports equipment by a mutual shift of his body weight from one to the other leg and thus a mutual underwater pressures of the rear ends of the floating body. The attached to the rear ends of the float fins produce a forward movement of the water sports equipment in the manner of a diver or finswimmers with his diving fins. A control of the direction of movement of the water sports device is done by a rotation of the user's feet and thus caused yawing of the float.

The invention will be explained below with reference to two embodiments. The accompanying drawings show in

Figure 1: the top view of a water sports equipment with a connecting rod in the front and attached to the side of the connecting rod auxiliary floating bodies, in

Figure 2: the side view of the water sports equipment, in

Figure 3: the top view of a water sports equipment without connecting rod, in

Figure 4: the side view of the water sports equipment without connecting rod and in the

Figures 5A to 5F: Chamfering the use of the water sports equipment to produce a forward movement.

Figure 1 shows the top view and Figure 2 shows the side view of a water sports equipment 1, which consists of two floats 2, which are connected by a connecting rod 3 with each other. The floats have a length of about 1, 90 m without fin and are the same. The connecting rod 3 projects laterally beyond the float 2. At the lateral ends of the connecting rod 3 Hilfsschwimmkörper 4 are arranged. Am in on-lane tion 5 rear end of each float 2, a fin 6 is attached. The leaves of the fins 6 are spring-resistant, so that the respective free end 7 of each fin is swung out by the action of a sufficiently large force on the sheet from the plane spanned by the longitudinal axis 8 and the transverse axis 9 plane. In Figure 2, this pivoting of the free end 7 of the blade of a fin is shown in dashed lines. The connecting rod 3 is in each case connected to each floating body 2 by means of a joint 10 having two rotational degrees of freedom, wherein the joint 10 is designed so that the rotational degrees of freedom are, on the one hand, a rotation 11 about an axis parallel to the transverse axis 9 and, on the other hand, a rotation 12 allow for a parallel to the vertical axis 13 extending axis. Each float 2 can thus perform a pitching motion, rotation about the transverse axis 9, and a yawing motion, rotation about the vertical axis 13. A rolling movement of a float 2, ie a rotation about its longitudinal axis 8, is not possible. The joints 10 are each arranged at a distance from the tip of the float 2, based on its longitudinal axis, which corresponds to 21% of the length of the float 2 without fin. Approximately in the region of the center of gravity 14 of each float 2, a foot plate 15 is formed with means 16 for foot mounting at the top of the float 2. The foot plate 15 is positioned in the longitudinal direction 8 of the floating body 2 such that the weight FQ of a user who stands upright with one foot on a foot plate 15 of a floating body 2 acts 1715 cm behind the center of gravity 14 of the floating body 2. The foot mounting means 16 are 17 gripping loops 16 over the instep of a user's foot.

FIG. 3 shows the plan view and FIG. 4 shows the side view of a water sports device 1, which consists only of two separate floats 2. A connection between the two floats 2 is not formed. The two floating bodies 2 are the same and in principle according to the description to the water sports device 1 shown in Figures 1 and 2, but with the difference that the base plate 15 is formed in the direction of the vertical axis 13 below the center of gravity 14. As a result of this embodiment of the footplate 15 below the center of gravity 14 of the floating body 2, a user 17, each standing with one foot resting on a footplate 15 of a floating body 2, causes a rolling movement of a float as a result of the attack of the weight FQ of the user 17 below the center of gravity 14 of the float 2 2 largely avoided. However, a rolling movement of a floating body 2 is not completely excluded, as in the in the figures 1 and 2 illustrated embodiment of the water sports device 1 is the case. The use of the water sports equipment 1 according to the embodiment shown in Figures 3 and 4 therefore requires a higher skill and body control of the user 17th

FIGS. 5A to 5G illustrate the intended use of the water sports device 1, this taking place by way of example with reference to the embodiment of the water sports device 1 shown in FIGS. 1 and 2. FIG. 5A shows a user 17 standing on the water sports device 1, with one foot each of the user 17 standing up on the foot plate 15 of a floating body 2 and being held in a largely positionally exact position by the loop 16 which grips over the instep of the foot on the foot plate 15. The buoyant force F _{A of} the float 2 and the weight FQ of the user 17 are coordinated so that the floats carry the weight of the user, ie they are almost equal. The floats 2 dive so far into the water that the arranged at the rear end of the float 2 fins 6 are on the water surface or slightly below.

In the chamfer illustrated in FIG. 5B, the user 17 displaces a considerable part of his body weight onto a leg, in the figure shown on the left leg, so that the rear-side part of the floating body 2 is pushed downwards, ie under water. When the rear-side part of the floating body 2 is pushed further with the fin 6 attached thereto, an overpressure p _y is created on the underside of the blade of the fin 6 and a negative pressure is present on the upper side. On the blade of the fin 6, a force FQ is exerted by the free end 7 of the fin 6 is pivoted out of the plane defined by the longitudinal and the transverse axis 8, 9 plane up. The water pressing against the underside of the blade flows in the direction of the free end 7 of the blade of the fin 6. At the same time, a force F _v directed toward the longitudinal axis of the float 2, namely toward its tip, is produced on the blade of the fin 6, which drives the water sports equipment 1 forward.

In the chamfer shown in Figure 5C, the rear end of the float 2 has reached its lowest point and is not pushed further down. The overpressure pci at the bottom of the blade of the fin 6 and the negative pressure at the top are dismounted. The free end 7 of the blade of the fin 6 has moved back due to the spring stiffness of the fin 6 in its initial position, ie it is spanned in the through the longitudinal and the transverse axis 8, 9 Level pivoted back - shown in Figure 5C phase. When returning Schwen ken ^¬ will be displaced from the underside of moving back to its initial position of the fin sheet 6 water at least partially flows in the direction of the free end 7 of the blade of the fin. On the blade of the fin 6 acts in the direction of the longitudinal axis 8 of the float 2, namely towards its tip, directed force F _v , which drives the water sports equipment 1 further forward.

In the chamfer shown in FIG. 5D, the user 17 relieves the floating body 2, which is pushed underwater at the stern, by displacing his body weight away from the left leg. The rear end of the floating body 2 with the attached fin 6 is pushed upwards by the action of the buoyancy force FA. The pressures acting on the blade of the fin 6 reverse, i. on its upper side creates an overpressure po and on its underside a negative pressure. On the blade of the fin 6, a force is exerted by the free end 7 of the fin is pivoted downwards. The water pressing against the top of the blade flows in the direction of the free end of the blade of the fin 6. On the blade of the fin 6, a directed in the direction of the longitudinal axis 8 of the float 8 force Fv is generated. The water sports equipment 1 is driven further forward.

The rear end of the float 2 is affected by the effect of

Buoyancy force FA pushed upward until the float 2 has reached a horizontal position. Figure 5E shows this chamfer of using the water sports equipment 1. The pressure differences at the top and bottom of the blade of the fin 6 are degraded and the free end 7 of the fin 6 moves due to the spring stiffness of the fin 6 back to its original position, ie it pivots in the plane spanned by the longitudinal and the transverse axis 8, 9 plane. In this case, water 6 is displaced from the upper side of the sheet, which returns to its starting position, of the fin, which flows at least partially in the direction of the free end 7 of the blade of the fin 6. On the blade of the fin 6 acts in the direction of the longitudinal axis 8 of the float 2, namely towards its tip, directed force F, which drives the water sports equipment 1 further forward. By shifting a significant portion of its body weight to the other leg, ie, as shown in FIG. 5F, to the right leg, the described operation is repeated with the other float 2. The user 17 thus generates a forward movement of the water sports device 1 by a mutual displacement of his body weight from one to the other leg and thus a mutual underwater pressures of the rear ends of the floating body. 2

List of reference numbers used

1 water sports equipment

2 floats

3 connecting rod

4 auxiliary floating bodies

5 direction of travel

6 fin

7 free end of the sheet of Flos

8 longitudinal axis

9 transverse axis

10 joint

11 rotation about the transverse axis 9

12 rotation about the vertical axis 13

13 vertical axis

14 Focus

15 foot plate

16 Foot fixing means

17 users

F _A Auftreibskraft

FQ weight

Overpressure

Force due to overpressure

Fv driving force

Claims

claims

1. water sports equipment (1) with two elongated, narrow, slidable on the water floats (2), on the upper sides of each a Fußplat- te (15) are formed with means (16) for foot mounting,

characterized in that

The foot plate (15) is formed in the longitudinal direction of the floating body (2) in such a position that the weight force (FQ) of a user (17), each standing with one foot on the foot plate (15) of a floating body (2), relative to the direction of travel (5) of the water sports device (1) between 1 cm to 30 cm, preferably between 10 cm to 20 cm, behind the center of gravity (14) of the floating body (2) attacks,

• Each float (2) is designed so that its buoyancy force (FA) is equal to or up to 10% less than or greater than half the weight (FQ) of the user (17) and

^• at the rear end (7) of each float (2) is arranged about a parallel to the transverse axis (9) of the floating body (2) lying axis against the force of a spring pivotable fin (6).

2. Water sports equipment (1) according to claim 1,

characterized in that

the fin is formed in the manner of the blade of a diving fin and is fixedly mounted lying at the rear end in the plane spanned by the longitudinal and the transverse axis of the floating body level.

3. Water sports equipment (1) according to claim 1 or 2,

characterized in that

the floating body (2) is inflatable and has an outer skeleton at least in the form of longitudinally extending struts.

4. water sports equipment (1) according to one of claims 1 to 3,

characterized in that

the foot plate (15) is formed in the direction of the vertical axis (13) of the floating body (2) below the center of gravity (14) of the floating body (2).

5. Water sports equipment (1) according to one of claims 1 to 4,

characterized in that

the two floating bodies (2) in the front direction in the direction of travel (5), preferably in the first third, by a connecting rod (3) connected to each other, wherein the connection between the connecting rod (3) and

each float (2) is articulated (2) via a joint (10) having two degrees of freedom in rotation, such that each float (2) has a pitching and yawing movement, i. a rotation about a transverse and a vertical axis (9, 13), can perform.

I0

6. water sports equipment (1) according to claim 5,

characterized in that

the connecting rod (3) projects beyond the floats (2) and is arranged on the connecting rod (3) laterally to the interconnected floating bodies (2) in the form of outrigger auxiliary floating bodies (4).

7. Water sports equipment (1) according to claim 5 or 6,

characterized in that

the position of the connection of the connecting rod (3) with the Schwimmkör-0 per (2) at a distance of between 10% to 35%, preferably between

Is 16% to 26% of the length of the floating body (2) without fin (6), to the tip of the floating body (2) in the direction of the longitudinal axis (8) of the

Floating body (2) and in the plane defined by the longitudinal and the vertical axis (8, 13) of the floating body (2) plane.

5

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