EP4367016A1 - Bâtons pour sport nautique - Google Patents

Bâtons pour sport nautique

Info

Publication number
EP4367016A1
EP4367016A1 EP22743482.6A EP22743482A EP4367016A1 EP 4367016 A1 EP4367016 A1 EP 4367016A1 EP 22743482 A EP22743482 A EP 22743482A EP 4367016 A1 EP4367016 A1 EP 4367016A1
Authority
EP
European Patent Office
Prior art keywords
membrane
country skiing
cross
water
water cross
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
EP22743482.6A
Other languages
German (de)
English (en)
Other versions
EP4367016B1 (fr
Inventor
Wilhelm Schunn
Horst SCHUNN
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4367016A1 publication Critical patent/EP4367016A1/fr
Application granted granted Critical
Publication of EP4367016B1 publication Critical patent/EP4367016B1/fr
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 
    • B63B34/00—Vessels specially adapted for water sports or leisure; Body-supporting devices specially adapted for water sports or leisure
    • B63B34/50—Body-supporting buoyant devices, e.g. bathing boats or water cycles
    • B63B34/565—Accessories, e.g. sticks for water walking

Definitions

  • the invention is in the field of propulsion aids for human-powered locomotion on water sports equipment, especially in the field of stand-up paddling.
  • Stand-up paddle boards and so-called stand-up paddle boards are very popular for leisure-oriented locomotion on the water.
  • stand-up paddleboarding the user stands on a floating surfboard and propels themselves by rowing with a paddle. Balancing and paddling while standing trains the athlete's balance, coordination and muscles.
  • a disadvantage of classic stand-up paddling is that for a straight ride with a single paddle, the rudder thrusts have to be set alternately on both sides of the surfboard.
  • the rowing motions with a paddle require both surfaces of the user, which is why a single long paddle is used in stand-up paddleboarding. This always leads to an asymmetrical propulsion of the surfboard.
  • GB 819382 A discloses a water propulsion device having a flexible sheath attached to an elongate rod with a handle.
  • the sheath includes flexible ribs that engage the rod as the sheath collapses.
  • GB 914358 A discloses a device for generating propulsion in a fluid comprising a floating rod-shaped handle to which is attached a conical sheath of flexible material. Two tubular arms protrude from the pole at an angle on opposite sides and span the flexible material.
  • US 4578038 A discloses Wilhelm Schunn and Horst Schunn ERNH -PCT an elongate propulsion device having a stick and a thrust means comprising a flexible foil.
  • the foil has several radial stiffening elements in the form of folds. The ends of the foil are tied to the tip of the stick with cords.
  • the object of the invention is an improved means of propulsion
  • the invention solves this problem with a water cross-country skiing pole with the features of the main claim.
  • the invention shows an advantageous alternative to a classic paddle.
  • the invention is based, inter alia, on the idea of transferring the thrusting drive movement with sticks, as is known from cross-country skiing in winter sports, to stand-up paddling.
  • the water skating pole includes a thrust drive device, a shaft and a grip.
  • the user preferably uses two cross-country skiing poles, holding the water cross-country skiing poles while standing on the surfboard with a fland on the handle and diving into the water on the sides of the surfboard.
  • the shock drive device is connected to the handle via the shaft.
  • the handle the user pushes the cross-country ski poles, which are hanging diagonally backwards, into the water against the direction of travel, thereby pushing off the water in the direction of travel and generating propulsion.
  • the user then pulls the water cross-country skiing poles forward again, i.e. in the direction of travel, in order to be able to push off again.
  • the propulsion takes place through repeated pushing movements in the water.
  • the shaft is preferably designed as a rigid or length-adjustable tube with a length in the range of one to two meters.
  • the movement generated by the user on the handle can be transmitted to the impact drive device via the shaft.
  • the flow resistance generated on the impact drive device by the impact movement is transmitted to the handle via the shaft. The user can move away from the water at the handle due to the flow resistance.
  • the shock drive device includes a diaphragm and a support structure.
  • the membrane preferably consists of a flow-flexible material, in particular a tear-resistant fabric.
  • the membrane is flexible and can adapt to the surrounding water flow.
  • the membrane is attached to the shock drive device in such a way that it inflates during a shock movement of the water cross-country ski pole and forms a storage volume for the adjacent water flow.
  • the storage volume formed by the membrane creates an increased flow resistance, which has a braking effect against the shock movement.
  • the storage volume formed by the membrane is preferably tent-shaped or funnel-shaped, i.e. tapering to a point.
  • the stowage volume tapers along the axis of the shaft towards the handle and increases towards the thrust drive device.
  • the impact drive device is designed to generate a high flow resistance in the water in the thrust direction, but to generate a low flow resistance in the pulling direction by the membrane resting against the support structure.
  • the thrust drive device can be used during the pulling movement between two thrusting movements in the water stay immersed. This eliminates the need for strenuous lifting of poles out of the water.
  • the membrane is attached to the support structure.
  • the support structure includes at least two support surfaces.
  • the support surfaces are arranged in at least two intersecting planes.
  • the support surfaces are formed from two or more metal sheets.
  • the support structure forms a rigid structure that is designed to have a shaping effect on the membrane.
  • the thruster includes a support structure having four support surfaces arranged in a cross shape at 90 degrees to each other. A star-shaped arrangement of three or more supporting surfaces is also possible.
  • the membrane is attached to the outer edges of the support surfaces.
  • the outer edges of the support structure and the membrane are designed to span a storage volume. Fastening the membrane to the outer edges of the support surfaces prevents the membrane from flapping away due to the flow applied during the impact movement.
  • the impact drive device forms a flow resistance that is dependent on the direction of movement.
  • the accumulation volume on the membrane results in increased flow resistance.
  • the membrane lies against the support structure and reduces the flow resistance.
  • the water cross-country skiing stick can be pulled forward with less flow resistance than occurs with the pushing movement in the water. This effect allows the cross-country skiing pole to remain in the water during the intermittent pushing and pulling movements without the braking effect of the pulling movement destroying the propulsion generated by the pushing movement.
  • This type of propulsion has a particular advantage over conventional paddles, which have to be set forward again after each pushing movement above the water surface in order to avoid too high a braking effect.
  • the support structure with the support surface and the adjacent membrane when pulling the water cross-country ski poles while driving forms an employed bearing surface to the direction of travel.
  • the flow of travel generates a lift force on at least one of the supporting surfaces.
  • the water cross-country ski poles are characterized in particular by a particularly dimensionally stable impact drive device.
  • the support structure with at least two rigid support surfaces forms a dimensionally stable storage volume in the membrane.
  • the support structure also has the advantage of providing good shock protection.
  • the support structure preferably protrudes beyond the membrane in the direction of the impact and keeps the membrane away from impacts with stones or other underwater debris.
  • the support structure according to the invention with at least two intersecting support surfaces has the further advantage that the storage volume (V) is divided into several chambers. If the membrane (21) tears at one point, only one of the chambers will be damaged. The other chambers remain dimensionally stable and thus retain a large part of their braking effect when pushing. This gives the water cross-country ski pole emergency running properties, with which the user can still generate sufficient propulsion for returning to land.
  • FIG. 1 A side view of a water cross-country ski pole (1), which is partially submerged under water;
  • FIG. 2 a perspective view of a water cross-country skiing pole (1) with expanded storage volume during a thrusting movement;
  • FIG. 3 a perspective view of a water cross-country ski pole
  • FIG. 4 a side view of a water walking stick with a top view of a detached membrane (21) shown next to it;
  • FIG. 5 an enlarged view of the impact drive device.
  • FIG. 1 shows an embodiment of the water cross-country skiing pole (1) during use.
  • the water cross-country skiing pole (1) comprises a thrust drive device (2), a shaft (3) and a handle (4).
  • the impact drive device (2) comprises a membrane (21) which, depending on the surrounding water flow, expands to form a storage volume or rests against the support structure. In FIG. 1, the membrane is expanded.
  • the shock propulsion device (2) is submerged under the water surface (W) and the shaft is held at a rearwardly sloping angle.
  • To generate propulsion is the Cross-country ski pole (1) pushed in the direction of impact (VS).
  • the impact direction (VS) is directed from the handle (4) towards the impact drive device (2).
  • the water flow applied to the impact drive device (2) during the impact movement (VS) causes an arrow-shaped storage volume (V) to arise within the membrane (21).
  • the storage volume (V) is spanned within the membrane (21).
  • the storage volume (V) can also be referred to as a storage funnel.
  • the propulsion effect is created both by the displacement of the mass of water in the storage volume and by the flow resistance of the water flow at the shock propulsion device while it is being moved through the water in the direction of shock (VS).
  • the propulsion effect depends, among other things, on the immersion angle of the water cross-country skiing pole relative to the water surface.
  • FIG. 2 shows a perspective view of a water cross-country skiing pole (1) with the storage volume inflated during a thrust movement (VS).
  • the impact drive device (2) comprises a support structure (22) with at least two support surfaces (23).
  • the support structure (22) comprises four support surfaces (23) standing one on top of the other.
  • the at least two support surfaces (23) intersect, preferably in the axis of the shaft (3).
  • the support surfaces (3) are preferably made from one or more metal sheets.
  • sheet metal means any flat material or profile that can be made of metal or of a plastic or composite material.
  • Two or more support surfaces can be formed from the same sheet metal.
  • Several sheets can also be welded together or on joined together or connected to one another in another way, eg screwed.
  • two opposing support surfaces (23) are formed from a continuous sheet metal.
  • One or more further support surfaces (23) are attached to the continuous support surface.
  • the support surfaces (23) are perforated to reduce weight.
  • the support surfaces (23) can be made of one or more metal sheets.
  • the supporting surfaces (23) are preferably made of an impact-resistant and/or corrosion-resistant metal.
  • aluminum, stainless steels or plastics can be used as materials.
  • a support structure made of carbon fiber materials or carbon fiber reinforced or glass fiber reinforced plastics is also possible.
  • the supporting surfaces (23) can advantageously be produced as injection molded parts.
  • the support surfaces (23) are preferably arranged in a star or cross shape around the theoretically extended axis of the shaft (3). In the preferred embodiment, the four supporting surfaces (23) are arranged at 90° to each other.
  • the support surfaces (23) advantageously form a flat contact surface for the membrane (21).
  • the contact surfaces each delimit a segment of the storage volume (V).
  • the contact surfaces can be provided with holes to reduce weight and still have an adequate flow-mechanical separation between the chambers.
  • the storage volume is formed between the stretched membrane (21) and the support surfaces (23). During the impact movement (VS) of the water cross-country ski pole in a liquid medium, the membrane (21) expands. The membrane (21) is held on the outer edges of the support surfaces (23).
  • the arrangement of the membrane on the arrow-shaped tapering outer edges of the support surfaces (23) creates a funnel-shaped storage volume.
  • the storage volume (V) catches the surrounding water and creates a very high flow resistance against the direction of impact (VS), i.e. when used correctly in the direction of travel. Due to the flow resistance of the expanded storage volume within the membrane (21), the user can push off the water and generate propulsion.
  • FIG 3 shows the water cross-country skiing pole (1) with the shock drive device (2) when the water cross-country skiing pole is moved through the water in the opposite direction, i.e. in the pulling direction (VZ).
  • the water flow applied to the impact drive device (2) allows the membrane to rest on the support surfaces (23).
  • At least one of the support surfaces (23) forms a bearing surface (T).
  • the water flow applied to the wing (T) forms a buoyancy.
  • the buoyancy generated on the wing (T) counteracts the weight of the cross-country skiing pole and makes it easier to use.
  • FIG. 4 shows a side view of an advantageous embodiment of the water cross-country skiing pole.
  • the shaft (3) of the water cross-country ski pole preferably consists of a kink-resistant tube.
  • the shaft (3) can be formed from two or more telescopic sections. The telescopic sections can be pushed into each other. The tube sections of the shank (3) are preferably guided into one another with sliding bushes.
  • the length of the water cross-country skiing pole can be adjusted by the user using a locking device or a clamp closure.
  • the locking device can be rotatable or adjustable by incremental detent positions.
  • the shaft (3) and/or the handle (4) comprises one or more buoyancy bodies.
  • One or more sections of the water cross-country skiing pole (1) comprise a water-tight and air-filled volume.
  • the buoyancy bodies of the water cross-country skiing pole are preferably dimensioned sufficiently large so that the air-filled buoyancy bodies cause a buoyancy force in the water that is greater than the weight of the water cross-country skiing pole. In this way, if the user accidentally drops the cross-country skiing pole into the water, the cross-country skiing pole will float and not sink to the bottom.
  • FIG. 4 also shows a plan view of a membrane (21).
  • the membrane (21) preferably has a circular outline.
  • the membrane (21) can be composed of several segments.
  • a one-piece, circular membrane (21) has the particular advantage that it is easy to manufacture and assemble.
  • the membrane (21) For attachment of the membrane (21) to the thrust drive device (2) of the water cross-country ski pole, the membrane (21) comprises one or more recesses (28).
  • the membrane (21) comprises a central hole, with which the membrane can be pulled over the shaft (3) and/or a shaft flange (31).
  • recesses can be provided to secure the membrane (21) against slipping on the support structure.
  • the membrane (21) is preferably fastened to the outer edges (23a) of the support surfaces (23) with recesses (28) arranged in the form of a line.
  • the support surfaces (23) comprise one or more retaining lugs on the outer edges (23a), which can each be inserted into one of the recesses (28) of the membrane (21).
  • the membrane (21) can be fastened to the support surfaces through the recesses (28) without the membrane (21) slipping under load.
  • the membrane (21) is preferably additionally attached to the outer edges (23a) of the support surfaces with one or more attachment means, e.g.
  • FIG. 5 shows an enlarged section of the impact drive device.
  • the support surfaces (23) each have an outer edge (23a) running outwards in the shape of an arrow from the shaft (3).
  • the outer edges of the support surfaces (23a) preferably form an angle of between 20° and 90°, preferably 45°, with respect to the axis of the shaft (3).
  • an arrow-shaped storage volume is formed within the membrane.
  • the membrane (21) is fastened to the supporting surfaces (23) at the outer edges (23a) with one or more fastening means (24).
  • the Fastening means (24) can be, for example, several rivets or screws with which the membrane placed over the outer edge is fastened to the support surface.
  • the impact drive device comprises an edge protection strip (25), preferably made of a U-profile.
  • the edge protection strip (25) serves to protect the membrane (21) on the outer edge (23a) if the cross-country skiing pole comes into contact with rocks or other objects under water.
  • the edge protection strip (25) can also serve as a fastening means for the membrane (21) on the outer edges (23a) of the support surfaces (23).
  • the edge protection strip (25) is preferably detachably attached to the support surface (23).
  • the membrane (21) is preferably releasably attached to the impact drive device and is replaceable. If the diaphragm (21) or any other component is damaged, the shock drive device
  • the membrane can advantageously be replaced quickly and easily by the user himself.
  • the support structure (22), in particular the support surfaces (23), are preferably connected to the shaft (3) by a flange (31).
  • the flange (31) has tube attachment section for attachment to the shaft (3) and one or more further attachment sections for attachment of the support surfaces (23).
  • the flange (31) is in the shaft
  • the support surfaces (23), on the other hand, are detachably attached to the flange (31), for example screwed.
  • the membrane (21) is preferably arranged in a groove (32) on the flange (31).
  • the support surfaces include one or more projections (26). The projections protrude beyond the surface of the support surface (23) covered by the membrane. The projections protect the membrane from impacts with sharp edges. The protrusions reduce the risk of the membrane (21) tearing if the cross-country ski pole hits a rock or other underwater obstacle.
  • the support structure (22) preferably comprises an inflow aid (27).
  • the flow aid (27) is arranged on the support surfaces (23) between the overhangs (26). Through gaps in the material, the water can flow faster under the adjacent membrane (21) at the points of the flow aid (27) and expand the membrane.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Tents Or Canopies (AREA)

Abstract

L'invention concerne un bâton pour sport nautique permettant de se déplacer sur un équipement de sport nautique, en particulier une planche de surf ou de paddle flottante, ce bâton pour sport nautique (1) comprenant un dispositif de propulsion par à-coups (2), une tige (3) et une poignée (4). Le dispositif de propulsion par à-coups (2) comprend une membrane (21) et une structure de support (22) de conception rigide présentant au moins deux surfaces de support (23) se croisant. La membrane est fixée aux bords extérieurs (23a) des surfaces de support (23).
EP22743482.6A 2021-07-08 2022-07-05 Bâtons pour sport nautique Active EP4367016B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202021103674.5U DE202021103674U1 (de) 2021-07-08 2021-07-08 Wasserlanglaufstöcke
PCT/EP2022/068574 WO2023280845A1 (fr) 2021-07-08 2022-07-05 Bâtons pour sport nautique

Publications (2)

Publication Number Publication Date
EP4367016A1 true EP4367016A1 (fr) 2024-05-15
EP4367016B1 EP4367016B1 (fr) 2026-03-25

Family

ID=82595229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22743482.6A Active EP4367016B1 (fr) 2021-07-08 2022-07-05 Bâtons pour sport nautique

Country Status (3)

Country Link
EP (1) EP4367016B1 (fr)
DE (1) DE202021103674U1 (fr)
WO (1) WO2023280845A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB819382A (en) 1957-01-22 1959-09-02 Hugh Scofield Bemrose Reciprocated water paddle
GB914358A (en) 1959-12-08 1963-01-02 Seajay Craft Ltd Apparatus for effecting propulsion in a fluid
US3800734A (en) * 1972-06-20 1974-04-02 Yun Whang Lee Water propulsion device
JPS5451199A (en) * 1977-09-29 1979-04-21 Toshiyuki Koba Water skis and stock
DE2839205A1 (de) * 1978-09-08 1980-03-20 Stefan Goettler Wasserski
WO1984000499A1 (fr) 1982-08-03 1984-02-16 Hendrik Lenten Moyen allonge de propulsion pour deplacer manuellement un engin de navigation a la surface de l'eau
DE8605920U1 (de) 1986-03-05 1986-05-15 Nollert, August, 7500 Karlsruhe Wasserski
US5558553A (en) * 1995-10-02 1996-09-24 Okano; Kiyoshige Water walking device, hull and stock thereof

Also Published As

Publication number Publication date
EP4367016B1 (fr) 2026-03-25
DE202021103674U1 (de) 2022-10-13
WO2023280845A1 (fr) 2023-01-12

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