RU2659718C1 - Water ski for water biathlon - Google Patents

Abstract

FIELD: sports.

SUBSTANCE: invention relates to floating means for entertainment and sport, namely to water walking skis. Water walking device contains skis in the form of two floats that hold the user on the water, each of which is made with a recess for the abutment of the user's foot, and two ski poles. Floats are connected at both ends by elastic elements and are made in the form of a hollow tube of rectangular cross-section with a submerged wing on the outer side of the hollow tube with respect to the user. From the underwater side on the surface of each of the floats are fixed flexible shields with the possibility of pressing them to the surface of the float when moving the float forward and with the possibility of forming a gap between the flexible shields and the surface of the float and providing resistance to movement when the float moves backwards. Each of the ski poles with its lower part is hinged in the front part of the corresponding float and is made in a curved shape, ensuring the grip of its upper part by the user's hand.

EFFECT: increase in efficiency in the implementation of a strong take-off when moving on skis with the preservation of stability on the water is achieved.

1 cl, 9 dwg

Description

The invention relates to floating equipment for entertainment and sports, namely, skiing for movement on the surface of the water. Such skis can be used, for example, for water biathlon.

A device for walking on water (RU 2346848 C2, 02.20.2009), containing two identical hard floats, the length of which is greater than the width, with mounts for legs and propulsive wings. The buoyancy of each of the floats has a value less than that necessary to hold the weight of the person using the device on the surface of the water, and the total buoyancy of the two floats is greater than or equal to the value necessary for this. The floats are connected to each other by two parallel bonds of rigid material with hinges at the ends, while maintaining parallelism to each other at any time. Each of the leg mounts is mounted on an axis parallel to the axis of the float, with the possibility of rotation at an angle of not more than 90 ° in each direction relative to the vertical longitudinal plane of the cross section of the float. The main disadvantage of this technical solution is the presence of tight connections between the floats, which interfere with maneuvering, which in turn affects useful work.

The gill-type surface skis are known (RU 2258635 C2, B63B 35/81, 08/20/2005) for entertainment and sports. Surface skis consist of a float located on a pipe with a solid frame with a grille on the front and rear, to which are attached valves in the form of strips, gills or scales, which allow water to pass when the ski moves forward and close the volume of water in the pipe when the ski moves backward, and ski poles with a handle on one end and a smaller-sized ski on the other. Provides an increase in useful traction when skiing. However, the disadvantage is the complex structural implementation associated with sticking strips, gills or scales.

Known skis with blades for moving on the surface of the water (RU 2406644 C2, B63B 35/83, 12/20/2010), containing two cylindrical floats equipped with different-sized blades, made with the ability to move the legs of the skier forward to close and open when the legs of the skier backward, while the size and the angle of the blades increases in the direction from the bow to the stern, and the front blade has the smallest length and smallest opening angle, the blades in the middle part have a larger size and the opening angle, and the rear blade has the largest greater length and the largest opening angle. Variegated blades can be equipped with a stop to prevent them from sticking to the bottom of the float, and a keel located along the longitudinal axis of the blade. This ski design is reliable, but quite difficult to implement, it is not provided for the use of poles, which could increase the useful traction when moving on them.

Known for water, semi-rigid, pneumatic skis for walking on water (SU 43825 A1, 05/10/1934) using brake fins mounted in the underwater part, while to create frontal rigidity, the skis are equipped with side and horizontal corrugations that serve simultaneously to direct oncoming jets of water under the waterline to prevent water from entering the leg hole. Skis contain a reverse brake, made in the form of a series of soft frameless fins reinforced with elastic scarves, of a lunar shape of various sizes, which are stepped in the underwater part of the ski. Provides increased stability of skis on the water, which in turn affects the reduction of useful traction.

Known for water skiing Kirova KD (SU 884710 A1, 11/30/1981) containing the foot mounts on the floats, control torsos, keel, articulated steering wheel and brake element, while the forefoot of the foot mount is pivotally mounted on the float with the possibility of rotation around the vertical axis, and the brake the element is made in the form of folding elastic shields, the toe of the foot mount is connected to the steering cables. The floats are made of flexible gas-tight material and filled with compressed gas. This ski design is quite difficult to use.

Closest to the claimed invention by technical nature are water skiing, adapted for use on the ground (US 4915659 A, 04/10/1990). Skis consist of two pontoons, usually streamlined, made of lightweight hard material, with many cups of flexible material attached to the bottom surface of the pontoon, each of the cups open at the back of it, and forms a pocket for water, and provides water resistance when reverse pontoon movement. Several keels are located longitudinally along the bottom of the pontoon, which ensures the stability of the pontoon in water and allows the user to walk on shallow water and a hard surface such as sand and hard ground without damaging the rubber cups on the bottom surface of the pontoon. In this technical solution, rubber cups create excessive resistance when the ski moves forward on the water and, especially, on the ground, slowly open completely and become operational only at the very end of the backward movement of the leg.

An object of the invention is the creation of a reliable device for movement on the surface of the water and the earth, which will be convenient and easy to use.

The technical result of the invention is to increase the efficiency in the implementation of a reference push when skiing (i.e., an increase in useful traction) while maintaining stability on the water.

The device for walking on water contains skis in the form of two floats that hold the user on the water, each of which is made with a recess for stopping the user's feet, and two ski poles. The floats are connected at both ends by elastic elements to ensure the mobility of the floats relative to each other. The floats are made in the form of a hollow pipe of rectangular cross section, having longitudinal ribs located on the underwater side of the pipe and equipped with a valve in the form of a flexible flap mounted in the region of the rear end of the pipe relative to the user to overlap the pipe section when the float moves backward. Moreover, the said floats in the form of a pipe are made with a rear part elongated on the upper surface of the pipe relative to the user, on the underwater side of which there is a keel with a wheel mounted on it with the possibility of rotation and a flexible flap that can be supported on the said wheel to provide resistance to movement in water when movement of the float back. In addition, each of the mentioned floats is made with a hydrofoil on the lateral side of the hollow pipe external to the user, made with a length equal to 0.4-0.65 of the length of the float, and a width equal to 0.9-1.3 of the width of the float, with a longitudinal a rib located on the outer edge of the hydrofoil and a movable flap pivotally mounted on the hydrofoil in the rear relative to the user and made 0.3-0.5 lengths of the hydrofoil. On the underwater side, flexible flaps are fixed between the ribs on the lower surface of each float with the possibility of pressing them to the surface of the float when the float moves forward and with the possibility of creating a gap between the flexible flaps and the surface of the float and providing resistance to movement when the float moves backward. Each of the ski poles with the lower part is pivotally fixed in front of the corresponding float and is made of a curved shape, providing for the capture of its upper part by the user's hand.

Flexible flaps mounted on the underwater side on the surface of each of the floats can, in the particular case of implementation, be made two-layer with a rough side adjacent to the float.

A device for walking on water is shown schematically in FIG. 1-9.

FIG. 1 is a general plan view of a device for walking on water.

FIG. 2 is a cross section of a device for walking on water AA.

FIG. 3 is a cross section of a device for walking on water BB.

FIG. 4 is a longitudinal section of one ski.

FIG. 5 is a fragment of a longitudinal section of one ski when the ski moves forward.

FIG. 6 is a longitudinal section of a two-layer scale when the ski moves forward.

FIG. 7 is a fragment of a longitudinal section of one ski when repelled from water with the ski moving backwards.

FIG. 8 is a longitudinal section of the side wing of the ski and a vector diagram of the speeds and forces acting on the flap.

FIG. 9 is a cross section of a pair of skis in a transport position.

In the figures, the positions indicated:

1. skiing

2. Recess for user foot rest

3. Hinge for ski poles

4. Elastic element connecting the skis

5. A hollow pipe of rectangular section

6. The hydrofoil

7. Movable flap

8. Swivel

9. The longitudinal ribs of the hollow pipe

10. A longitudinal rib along the outer edge of the hydrofoil

11. Flexible guards

12. Ski boot

13. Ski stick

14. Valve in the form of a flexible flap

15. Flat elongated on the upper surface of the pipe back of the ski

16. Kiel

17. Wheel

18. A flexible guard for pushing away from water

The device for walking on water contains skis in the form of two floats (1) holding the user on the water, each of which is made with a recess (2) to rest the user's feet in the ski boot (12), and two ski poles (13), pivotally mounted in front of each ski.

Ski floats (1) are connected at both ends - front and rear relative to the user, by elastic or rubber elements (4) to ensure the mobility of the floats relative to each other. They do not allow skis to diverge excessively relative to each other, but at the same time provide the necessary freedom of movement.

Each of the ski floats is made in the form of a hollow tube (5) of rectangular cross section with a flat back (15) elongated along the upper surface of the pipe (5) relative to the user. In the area of the rear end of the pipe (5) relative to the user, a valve is placed in the form of a flexible shield (14), which overlaps the cross-section of the pipe (5) when the float moves backward, which creates additional resistance to water and allows better repulsion from water. The elongated part (15) increases the stability of skis on the water. On the flat elongated along the upper surface of the pipe part (15), a keel (16) is installed with a wheel (17) fixed to it and rotatable, and a flexible shield (18) that abuts the wheel (17) when the float moves backward and in this position provides resistance to movement and repulsion from water.

Since the skis have a sufficiently large windage and therefore are inconvenient to carry to the water in their hands, the keel wheel allows the skis to be carried on the ground, which facilitates transportation.

The underwater wing (6) of the ski float is made with a length equal to 0.4-0.65 of the length of the ski float (1) and a width equal to 0.9-1.3 of the width of the float (1), and the movable flap (7) is made of length equal to 0.3-0.5 length of the hydrofoil (6). These wing and flap run parameters are optimal from the point of view of ensuring the highest possible stability with an increase in useful traction when skiing. When performing the wing and flap with dimensions that exceed these limits, an excessive increase in the buoyancy of water occurs.

On each pipe (5), longitudinal ribs (9) are made from the underwater side perpendicular to the bottom surface of the pipe, and along the outer edge of each underwater wing (6), a longitudinal rib (10) is made perpendicular to the surface of the underwater wing. The ribs (9) and (10) are designed for the convenience of walking on the ground or shallows.

On the underwater side on the lower surface of each of the floats (1) between the ribs (9) located on the pipe and the ribs (9) on the pipe and the rib (10) on the hydrofoil (6), flexible flaps (11) are fixed with the possibility of pressing them to the surface of the float with the forward movement of the float forward and with the possibility of a gap between the flexible flaps (11) and the surface of the float and provide resistance to movement when the float moves backward. This arrangement of flexible flaps (11) allows you to protect the flaps from damage when the ski is in contact with the ground and at the same time does not interfere with their functioning.

Flexible flaps (11), mounted on the underwater side on the surface of each float, can be made of two-layer rubber with a rough side adjacent to the float, which will allow the ski to glide well when moving forward, since the coefficient of friction of water against rubber is small, and when backward movement of the ski the rough side (pimples or pile) of the flexible shields, which has a greater coefficient of friction of water, will increase the braking of the ski and allow it to better push off from the water or create a better emphasis on the water.

Each of the ski poles (13) is fixed with its lower part by means of a hinge (3) in front of the corresponding float, which increases the convenience of skiing on water and allows better repulsion. Ski poles are made of curved shape, which provides the ability to grab them by the hand of the user’s hands and takes into account the position of the hands during repulsion, namely, when bending and unbending the arms at the elbow.

The operation of the device can be described in the form of two working cycles that each ski makes: translational movement forward and backward.

With the forward movement of the supporting ski forward, the flexible flaps (11) are pressed to the bottom of the float (i.e., pressed to the surface of the pipe (5) and the hydrofoil (7)); a valve (14) in the form of a flexible shield at the rear end of the pipe (5) is open (i.e., it occupies an approximately horizontal position); a flexible shield (18) for repelling from water, mounted on the elongated rear part (15) of the pipe (5) near the keel (16) with the wheel (17), also occupies an approximately horizontal position, without interfering with the movement of the ski.

With the forward movement of the support ski back, the flexible flaps (11) are unbent and occupy their working open position relative to the bottom of the float, i.e. are located almost perpendicular to the bottom of the float; the valve (14) in the form of a flexible flap at the rear end of the pipe (5) is closed, i.e. the pipe section is blocked by a flexible shield; the flexible shield (18) is bent with an emphasis on the wheel (17) mounted on the keel (16). All of these elements increase the effectiveness of the implementation of the reference shock in water.

Under the influence of the weight of the skier, a vertical downward movement with a speed V of the flap (7) connected by a hinge (8) with a hydrofoil (6), and a simultaneous vertical movement of the flap of the second ski upward with a speed of V ¹ , caused by the effort of the skier and the force of Archimedes, create accordingly additional traction force F and F ¹ , which moves the skier forward on the surface of the water.

The noted design features of the proposed skis for water biathlon allow the athlete to move faster on water and land, while maintaining high stability on the water, increase efficiency in use and ease of transportation compared to the prototype.

Claims (2)

1. A device for walking on water, containing skis in the form of two floats that hold the user on the water, each of which is made with a recess for stopping the user's feet, and two ski poles, characterized in that the floats are connected at both ends by elastic elements providing mobility floats relative to each other and made in the form of a hollow pipe of rectangular cross section, having longitudinal ribs located on the underwater side perpendicular to the bottom surface of the pipe and equipped with a valve in the form of a flexible shield, installed in the region of the rear end of the pipe relative to the user for overlapping the pipe section when the float moves backward, with the rear part elongated along the upper surface of the pipe relative to the user, on the underwater side of which there is a keel with a wheel mounted on it with the possibility of rotation and a flexible shield with the possibility of support on said wheel to provide resistance to movement in water when the float moves backward and with a hydrofoil on the side of the hollow pipe external to the user, you a full length equal to 0.4-0.65 of the length of the float, and a width equal to 0.9-1.3 of the width of the float, with a longitudinal rib located on the outer edge of the hydrofoil, and a movable flap pivotally mounted on the hydrofoil in the rear parts relative to the user and a length equal to 0.3-0.5 of the length of the hydrofoil, and on the underwater side on the bottom surface of each of the floats, flexible flaps are fixed between the ribs with the possibility of pressing them to the surface of the float when the float moves forward and with the possibility of a gap between the flexible flaps and the surface of the float and provide resistance to movement when the float back, wherein each of the ski sticks bottom part is hinged in front of the corresponding float and is curved form affording capture her upper hand of the user. 2. The device according to claim 1, characterized in that the flexible flaps mounted on the underwater side on the surface of each of the floats are made two-layer with a rough side adjacent to the float.

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