EP3415206A1 - Glideboard - Google Patents

Glideboard Download PDF

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Publication number
EP3415206A1
EP3415206A1 EP18177628.7A EP18177628A EP3415206A1 EP 3415206 A1 EP3415206 A1 EP 3415206A1 EP 18177628 A EP18177628 A EP 18177628A EP 3415206 A1 EP3415206 A1 EP 3415206A1
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EP
European Patent Office
Prior art keywords
core
layers
board according
gliding board
modulus
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Granted
Application number
EP18177628.7A
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German (de)
French (fr)
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EP3415206B1 (en
Inventor
André-Jean Kruajitch
Vincent Serclerat
Jean-Pierre Ract
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.)
Skis Rossignol SA
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Skis Rossignol SA
Rossignol SA
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Publication of EP3415206A1 publication Critical patent/EP3415206A1/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • A63C5/126—Structure of the core
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials
    • A63C5/122—Selection of particular materials for damping purposes, e.g. rubber or the like

Definitions

  • the invention relates to the field of boardsports using a board, including snow sliding sports. It relates more specifically to an internal structure of board, and in particular ski or snowboard. It is more particularly a structure of the inner core of such a board, intended to improve both the performance and comfort of the user.
  • a snow-sliding board has a structure comprising a lower assembly and an upper assembly, each including reinforcing layers, which are separated by an inner core to separate these stiff reinforcement layers from the fiber neutral.
  • Such a sandwich-type structure thus has a rigidity in flexion and torsion that allows the board to evolve on the snow while ensuring both the contact of the sole glide on the snow, and the grip of the side edges when the board is inclined.
  • the reinforcing layers are made of materials having a high rigidity, based on metal, or fibrous material impregnated with resin in the form of composite material.
  • the core is made of a material that must have multiple qualities that are mainly a mass as low as possible, and some resistance to crushing.
  • the document EP 2 384 464 describes a gliding board in the form of a snowboard, the core of which has in the central part an element of greater rigidity. This element is intended to serve as side edge when the board is cut in two along a longitudinal plane, to seal against the rest of the core.
  • the document US 2011/206895 discloses a gliding board whose structure comprises metal elements arranged vertically in lateral areas, and in contact with longitudinal beams of the core, in order to stiffen this structure.
  • a gliding board combining different areas arranged parallel in the longitudinal direction. These different zones are arranged so that they can move relative to each other during the molding of the board, so as to absorb deformations induced by the presence of localized reinforcing elements, or so as to achieve cores that have rugged shapes.
  • the document AT 388 875 discloses a gliding board whose structure incorporates an elastomeric layer which covers a portion of the beams forming the core, and has a fraction interposed between the core and the upper or lower assembly.
  • One of the objectives of the invention is to provide a gliding board which has both good grip properties, in particular by improving these properties in transverse flexion, with a behavior however comfortable.
  • this gliding board is characterized in that the elongate member is formed by the assembly of at least three layers extending vertically at least over the entire height of the core. These three layers comprise a central layer made of a material having a transverse Young's modulus greater than the transverse Young's modulus of the material constituting the core, and two lateral layers coming into contact with the central layer, and made of an elastomeric material.
  • the invention consists in segmenting the core so as to increase its stiffness in flexion, its stiffness in transverse flexion, and its stiffness in torsion with respect to a monolithic core without elongate element, while increasing the resistance to crushing of the core since the central layer of the elongate element comes into vertical contact with the upper and lower assemblies, while being separated horizontally from the beams of the core by the elastomeric layers. These differences in stiffness are, however, felt to a lesser extent on the board since the lower and upper reinforcements strongly stiffen the core.
  • the improvement of the mechanical properties in particular in transverse flexion thanks to the specific structure of the core makes it possible to favor the use of fibrous reinforcements which have limited transverse mechanical properties, but which are easier to conform than metal reinforcements.
  • the fact of separating the two parts of the core by this elongate element substantially modifies the dynamic behavior of the board.
  • the assembly obtained by the two parts of the core and the elongated element behaves as an assembly formed of a main mass with which is associated a dynamic mixer.
  • the portion of the core located near the edge in contact with the snow constitutes the main mass and the assembly formed by the other part of the core constitutes the mass of the drummer while the element Longiline is the stiffness and / or damping of the drummer.
  • the elongated element being formed of three layers of elastomer-reinforcement-elastomer type, this makes it possible to choose the stiffness of the beater, more precisely by the choice of the central reinforcing layer and the damping of the beater by the choice of the elastomeric side layers.
  • the presence of the central reinforcement makes it possible to avoid significant transverse deformation and breakage between the two parts of the core, and allows elastomeric shear layers to be created inside to dissipate the energy and dampen the vibration level. .
  • the invention can be implemented on different types of cores, and in particular the cores made of wood, or injected foam, typically based on polyurethane.
  • the elongate element extends over a portion of the length of the board, or even over the entire length of the core.
  • it can be located at different levels of the board, either at the front or at the back, preferably with a presence at the level where the forces on the edges are exerted during the turning phases, namely at the area where the attachment is located.
  • the characteristic elongate element is associated with the other parts of the core before molding, or during molding.
  • the characteristic element can be put in place inside the mold, and delimits two volumes in which the foam of the core will be injected during the molding operation.
  • the elongated element may have a central layer made of a material selected from the group consisting of aluminum, acrylonitrile butadiene styrene (ABS), or composite materials based on long or short fibers.
  • ABS acrylonitrile butadiene styrene
  • the central layer of the elongate element may have a width of between 0.3 and 4 mm, preferably between 0.6 and 2 mm.
  • the side layers of the elongate element may be made of a material chosen from the group comprising rubber, thermoplastic polyurethanes, styrene-ethylene-butadiene-styrenes (SEBS), or else other materials with properties elastomeric.
  • SEBS styrene-ethylene-butadiene-styrenes
  • the material of the lateral layers may advantageously be a viscoelastic material, which has a sufficient damping coefficient, and optimized for operation over a temperature range of -20.degree. C. and + 5.degree. ensure an efficient dissipation of the mechanical energy generated in the structure during the deformation of the board.
  • these lateral layers may advantageously have a width of between 0.1 and 1 mm, preferably between 0.3 and 0.7 mm.
  • a first type of comfortable ski by using an elongated element composed of a central layer of ABS of thickness 2mm covered on each of its two lateral sides with a rubber layer of 0.5mm thick.
  • a second type of comfortable and more efficient ski can be obtained by using an elongated element composed of a 0.6mm thick aluminum core layer covered on each of its two lateral sides with a 0.5mm rubber layer. thickness.
  • the principle of the invention can be declined by including a plurality of similar elongated elements arranged in parallel, or spaced from each other so as to form a larger number of portions of the core to create multiple dynamic drummers, or joined to each other to modify the parameters of the dynamic mixer and in particular its parameters of mass, stiffness and / or damping.
  • the gliding board 1 comprises a lower assembly 2, and an upper assembly 3, separated by a core 4.
  • the lower assembly 2 comprises a gliding sole 7, typically based on polyethylene, on which the fins of metal edges 8.
  • this lower assembly 2 also includes a reinforcing layer 9.
  • This layer can be made from different materials and in particular based on metal, or preferably for questions of overall weight, by composite materials, including high tenacity fibers, such as glass, aramid, basalt or the like, mainly oriented parallel to the longitudinal axis of the board. It is of course possible that the lower assembly 2 includes several reinforcement layers of a similar or different nature and size, without departing from the scope of the invention.
  • the board 1 also includes an upper assembly, which comprises from the top a decorative and protective layer 11 , resting on a reinforcing layer 12.
  • the decoration and protection layer 11 can be made in different ways, and include on its underside of the printed areas apparent from the upper face of the board, or even areas transparent, to make apparent from the outside the reinforcing layer 12. Multiple alternative embodiments can be envisaged with respect to this decorative layer and protection, without departing from the scope of the invention.
  • the upper assembly 3 comprises a reinforcing layer 12, which may also be made in different ways, and in particular metal or preferably composite material.
  • This reinforcing layer 12 can adopt different geometries depending on the overall geometry of the board, and in particular the possibly three-dimensional shape of the upper face of the board.
  • This layer can also be multiple, by combining different thicknesses of identical nature, similar or different.
  • the upper 3 and lower 2 assemblies are separated mainly by the core 4, which is laterally bordered by the edges 5 which protect the core from the external moisture, and which ensure the transmission of forces from the upper assembly towards the edges 8 .
  • this core 4 has a particular structure, since it includes an elongated element 20, which separates the core 4 into two left side portions 21 and 22.
  • This elongate element extends as illustrated in FIG. the figure 3 along the entire length of the core, along its median longitudinal plane.
  • this elongate member may be shorter, and extend only over a portion of the length of the core.
  • This elongate member 20 extends vertically between the upper 3 and lower sets 2 and has an identical height to that of the nucleus.
  • the elongate member may be higher than the core and fit between two portions of an upper (or lower) brace, penetrating the upper (or lower as appropriate) assembly.
  • the upper or lower assembly may each include a localized layer for interfacing between the elongate member and the remainder of the upper or lower assembly.
  • This elongated element 20 is composed of several vertically assembled layers interposed between the two parts 21, 22 of the core.
  • the central layer 30 of the elongate element is made of a material much more rigid than the rest of the core, and more precisely which has a Young's modulus in the transverse direction significantly higher than that of the material constituting the remainder of the core.
  • this central layer 30 Various materials may be used to produce this central layer 30, and in particular metal materials and in particular aluminum-based materials such as aluminum alloy 7075, also known as "Zicral". Good results have been obtained with a thickness e 1 of this central layer 30 close to 0.6 mm.
  • the transverse Young's modulus of this material is close to 70,000 MPa, compared with the transverse Young's modulus of wood used for the manufacture of cores, is generally between 500 and 1000 MPa. It will be noted in particular that, given the essentially longitudinal orientation of the wood fibers used for making the cores, the Young's modulus in the longitudinal direction of these materials is generally higher, between 5000 and 15000 MPa.
  • a polymeric material and in particular ABS, with a thickness e 1 of the order of 2 mm may be used to form the central layer 30 of the elongate element 20 , this material having a Young's modulus of the order of 1,800 MPa.
  • this central layer 30 is lined with two lateral layers 31, 32 which are made of an elastomeric material. Good results were obtained using rubber, a thickness e 2 of the order of 0.5 mm.
  • the different layers of the elongate element are assembled together and with the rest of the core by gluing, for example.
  • the characteristic slender element Due to the presence of the characteristic slender element, an increase in the bending stiffness of the core has been observed. Given that most of the bending stiffness of the board is conferred by the presence of the reinforcing layers of the upper and lower sets, the impact of this increase in bending stiffness of the core on that of the board is however marginal. At the same time, there is an increase in the stiffness in transverse flexion and torsion of the core. Indeed, in particular in the case where the reinforcing layers of the upper and lower assemblies are based on unidirectional fibrous materials oriented longitudinally, the stiffness in transverse flexion imparted by these reinforcements is relatively limited compared to that measured in the longitudinal direction. . The contribution of the rigidity of the characteristic slender element is particularly important for the dynamic behavior of the board. An increase in torsional stiffness has also been observed due to the presence of the characteristic slender element.
  • the behavior of a board according to the invention makes it possible to obtain a board with improved grip when the board is on the edge and an inscription in the sharper curves. Because of the attenuation of the vibrations, the board remaining more easily inscribed on its trajectory.
  • the effect damping caused by the combination of a rigid material and an elastomeric material within the elongated element provides the board a certain softness in the deformation, and therefore a more comfortable board for the user.

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  • Laminated Bodies (AREA)

Abstract

Planche de glisse sur neige (1), présentant une structure incluant : €¢ un ensemble inférieur formé (2) d'une semelle de glisse bordée (7) de carres (8) et d'une ou plusieurs couches (9) de renfort inférieur ; €¢ un ensemble supérieur (3) formé d'une ou plusieurs couches de renfort supérieur (12) et d'une couche supérieure de protection et de décoration (11) ; €¢ un noyau (4) interposé entre les ensembles (9) inférieur et supérieur (3) ; €¢ un élément longiligne (20) s'étendant dans le sens longitudinal de la planche, séparant le noyau en deux parties (21, 22), et venant au contact des ensembles supérieur (3) et inférieur (2), caractérisée en ce que l'élément longiligne (20) est formé par l'assemblage d'au moins trois couches s'étendant verticalement entre les ensembles supérieur (3) et inférieur (2), les trois couches comprenant une couche centrale (30) réalisée en un matériau présentant un module de Young transversal supérieur au module de Young transversal du matériau composant le noyau (21, 22), et deux couches latérales (31, 32) venant au contact de la couche centrale (30), et réalisées en un matériau élastomérique.Snow sliding board (1), having a structure including: A lower assembly formed (2) of a bordered gliding sole (7) of edges (8) and one or more layers (9) of lower reinforcement; An upper assembly (3) formed of one or more upper reinforcing layers (12) and an upper protective and decorative layer (11); A core (4) interposed between the lower and upper sets (9) (3); An elongated element extending in the longitudinal direction of the board, separating the core into two parts (21, 22), and coming into contact with the upper (3) and lower (2) assemblies, characterized in that that the elongated element (20) is formed by assembling at least three vertically extending layers between the upper (3) and lower (2) assemblies, the three layers comprising a central layer (30) made in one material having a transverse Young's modulus greater than the transverse Young's modulus of core material (21,22), and two side layers (31,32) engaging the core layer (30) and made of an elastomeric material .

Description

Domaine TechniqueTechnical area

L'invention se rattache au domaine des sports de glisse utilisant une planche, et notamment les sports de glisse sur neige. Elle concerne plus spécifiquement une structure interne de planche, et en particulier de ski ou de surf des neiges. Elle vise plus particulièrement une structure du noyau interne d'une telle planche, destinée à améliorer à la fois les performances et le confort de l'utilisateur.The invention relates to the field of boardsports using a board, including snow sliding sports. It relates more specifically to an internal structure of board, and in particular ski or snowboard. It is more particularly a structure of the inner core of such a board, intended to improve both the performance and comfort of the user.

Techniques antérieuresPrevious techniques

De manière générale, une planche de glisse sur neige présente une structure comportant un ensemble inférieur et un ensemble supérieur, incluant chacun des couches de renfort, qui sont séparées par un noyau interne permettant d'écarter ces couches de renfort rigide par rapport à la fibre neutre. Une telle structure de type sandwich présente ainsi une rigidité en flexion et en torsion qui permet à la planche d'évoluer sur la neige en assurant à la fois le contact de la semelle de glisse sur la neige, et l'accroche des carres latérales lorsque la planche est inclinée.Generally, a snow-sliding board has a structure comprising a lower assembly and an upper assembly, each including reinforcing layers, which are separated by an inner core to separate these stiff reinforcement layers from the fiber neutral. Such a sandwich-type structure thus has a rigidity in flexion and torsion that allows the board to evolve on the snow while ensuring both the contact of the sole glide on the snow, and the grip of the side edges when the board is inclined.

En pratique, les couches de renfort sont réalisées en des matériaux présentant une forte rigidité, à base de métal, ou de matériau fibreux imprégné de résine sous forme de matériau composite. Le noyau est quant à lui réalisé en un matériau qui doit présenter des qualités multiples que sont principalement une masse la plus faible possible, et une certaine résistance à l'écrasement.In practice, the reinforcing layers are made of materials having a high rigidity, based on metal, or fibrous material impregnated with resin in the form of composite material. The core is made of a material that must have multiple qualities that are mainly a mass as low as possible, and some resistance to crushing.

Parmi les matériaux donnant satisfaction pour ce noyau, on peut noter les bois légers, tel que le peuplier ou le balsa, ou bien encore le carton ondulé, en ce qui concerne les planches dont le noyau est fabriqué avant le moulage de la globalité de la structure. Pour les skis dont le noyau est fabriqué pendant le moulage, par injection d'un matériau expansible dans l'espace formé entre l'ensemble supérieur et l'ensemble inférieur, la mousse de polyuréthanne est fréquemment employée. Il a déjà été proposé de réaliser des noyaux complexes, combinant différents types de matériaux.Among the satisfactory materials for this core, we can note the light woods, such as poplar or balsa, or even the corrugated cardboard, as regards the boards whose core is manufactured before the molding of the whole of the structure. For skis whose core is manufactured during molding, by injecting an expandable material into the space formed between the upper and the lower assembly, the polyurethane foam is frequently used. It has already been proposed to make complex cores, combining different types of materials.

Ainsi, le document EP 2 384 464 décrit une planche de glisse se présentant sous la forme d'un surf des neiges, dont le noyau présente en partie centrale un élément de plus forte rigidité. Cet élément est destiné à servir de chant latéral lorsque la planche est découpée en deux selon un plan longitudinal, afin d'assurer l'étanchéité vis-à-vis du reste du noyau. Par ailleurs, le document US 2011/206895 décrit une planche de glisse dont la structure comporte des éléments métalliques disposés verticalement dans des zones latérales, et au contact de poutres longitudinales du noyau, dans le but de rigidifier cette structure.Thus, the document EP 2 384 464 describes a gliding board in the form of a snowboard, the core of which has in the central part an element of greater rigidity. This element is intended to serve as side edge when the board is cut in two along a longitudinal plane, to seal against the rest of the core. In addition, the document US 2011/206895 discloses a gliding board whose structure comprises metal elements arranged vertically in lateral areas, and in contact with longitudinal beams of the core, in order to stiffen this structure.

On a par ailleurs décrit dans le document FR 2 655 864 , une planche de glisse combinant différentes zones disposées parallèlement dans le sens longitudinal. Ces différentes zones sont agencées de telle sorte qu'elles peuvent se déplacer les unes par rapport aux autres lors du moulage de la planche, de manière à absorber des déformations induites par la présence d'éléments de renfort localisés, ou de manière à réaliser des noyaux qui présentent des formes accidentées.It has also been described in the document FR 2,655,864 , a gliding board combining different areas arranged parallel in the longitudinal direction. These different zones are arranged so that they can move relative to each other during the molding of the board, so as to absorb deformations induced by the presence of localized reinforcing elements, or so as to achieve cores that have rugged shapes.

Le document AT 388 875 décrit une planche de glisse dont la structure intègre une couche élastomérique qui recouvre une partie des poutres formant le noyau, et possède une fraction interposée entre le noyau et l'ensemble supérieur ou inférieur.The document AT 388 875 discloses a gliding board whose structure incorporates an elastomeric layer which covers a portion of the beams forming the core, and has a fraction interposed between the core and the upper or lower assembly.

Exposé de l'inventionPresentation of the invention

Un des objectifs de l'invention est de fournir une planche de glisse qui présente à la fois des bonnes propriétés d'accroche, en particulier par une amélioration de ces propriétés en flexion transversale, avec un comportement toutefois confortable.One of the objectives of the invention is to provide a gliding board which has both good grip properties, in particular by improving these properties in transverse flexion, with a behavior however comfortable.

Pour ce faire, le Demandeur a conçu une planche de glisse sur neige, qui présente une structure incluant :

  • un ensemble inférieur formé d'une semelle de glisse bordée de carres, et d'une ou plusieurs couches de renfort inférieur ;
  • un ensemble supérieur formé d'une ou plusieurs couches de renfort supérieur, et d'une couche supérieure de protection et de décoration ;
  • un noyau interposé entre les ensembles inférieur et supérieur ;
  • un élément longiligne s'étendant dans la direction longitudinale de la planche, séparant le noyau en deux parties, et venant au contact des ensembles supérieur et inférieur.
To do this, the Applicant has designed a board for sliding on snow, which has a structure including:
  • a lower assembly formed of a glide sole bordered with edges, and one or more layers of lower reinforcement;
  • an upper assembly formed of one or more upper reinforcing layers, and a top layer of protection and decoration;
  • a nucleus interposed between the lower and upper sets;
  • an elongated member extending in the longitudinal direction of the board, separating the core into two portions, and contacting the upper and lower assemblies.

Conformément à l'invention, cette planche de glisse se caractérise en ce que l'élément longiligne est formé par l'assemblage d'au moins trois couches s'étendant verticalement au moins sur toute la hauteur du noyau. Ces trois couches comprennent une couche centrale réalisée en un matériau présentant un module de Young transversal supérieur au module de Young transversal du matériau composant le noyau, et deux couches latérales venant au contact de la couche centrale, et réalisées en un matériau élastomérique.According to the invention, this gliding board is characterized in that the elongate member is formed by the assembly of at least three layers extending vertically at least over the entire height of the core. These three layers comprise a central layer made of a material having a transverse Young's modulus greater than the transverse Young's modulus of the material constituting the core, and two lateral layers coming into contact with the central layer, and made of an elastomeric material.

L'invention consiste à segmenter le noyau de manière à augmenter sa raideur en flexion, sa raideur en flexion transversale, et sa raideur en torsion par rapport à un noyau monolithique sans élément longiligne, tout en augmentant la résistance à l'écrasement du noyau puisque la couche centrale de l'élément longiligne vient au contact verticalement des ensembles supérieur et inférieur, tout en étant séparée horizontalement des poutres du noyau par les couches élastomériques. Ces différences de raideurs sont cependant ressenties dans une moindre mesure sur la planche étant donné que les renforts inférieur et supérieur rigidifient fortement le noyau.The invention consists in segmenting the core so as to increase its stiffness in flexion, its stiffness in transverse flexion, and its stiffness in torsion with respect to a monolithic core without elongate element, while increasing the resistance to crushing of the core since the central layer of the elongate element comes into vertical contact with the upper and lower assemblies, while being separated horizontally from the beams of the core by the elastomeric layers. These differences in stiffness are, however, felt to a lesser extent on the board since the lower and upper reinforcements strongly stiffen the core.

En particulier, l'amélioration des propriétés mécaniques notamment en flexion transversale, grâce à la structure spécifique du noyau permet de privilégier l'emploi de renforts fibreux qui présentent des propriétés mécaniques transversales limitées, mais qui sont plus faciles à conformer que les renforts métalliques.In particular, the improvement of the mechanical properties in particular in transverse flexion, thanks to the specific structure of the core makes it possible to favor the use of fibrous reinforcements which have limited transverse mechanical properties, but which are easier to conform than metal reinforcements.

Par ailleurs, le fait de séparer les deux parties du noyau par cet élément longiligne modifie sensiblement le comportement dynamique de la planche. En effet, l'ensemble obtenu par les deux parties du noyau et l'élément longiligne se comporte comme un ensemble formé d'une masse principale à laquelle est associé un batteur dynamique. Ainsi, lorsque la planche bascule sur la carre, la partie du noyau située proche de la carre en contact avec la neige constitue la masse principale et l'ensemble formé par l'autre partie du noyau constitue la masse du batteur tandis que l'élément longiligne constitue la raideur et/ou l'amortissement du batteur. Cela permet d'obtenir un décalage des fréquences de résonance de la planche, voire également une diminution du niveau d'amplitude aux fréquences de résonnance, ceci permettant d'obtenir une planche vibrant moins sur la carre, plus ancrée sur sa trajectoire, l'utilisateur appréciant ainsi le confort obtenu du fait de la diminution des vibrations. L'élément longiligne étant formé de trois couches de type élastomère-renfort-élastomère, cela permet de choisir la raideur du batteur, plus précisément par le choix de la couche centrale de renfort et l'amortissement du batteur par le choix des couches latérales élastomériques. De plus, la présence du renfort central permet d'éviter une déformation transversale importante et une cassure entre les deux parties du noyau, et permet de créer à l'intérieur des couches élastomériques du cisaillement pour dissiper l'énergie et amortir le niveau des vibrations.Moreover, the fact of separating the two parts of the core by this elongate element substantially modifies the dynamic behavior of the board. Indeed, the assembly obtained by the two parts of the core and the elongated element behaves as an assembly formed of a main mass with which is associated a dynamic mixer. Thus, when the board tilts on the edge, the portion of the core located near the edge in contact with the snow constitutes the main mass and the assembly formed by the other part of the core constitutes the mass of the drummer while the element Longiline is the stiffness and / or damping of the drummer. This makes it possible to obtain an offset of the resonant frequencies of the board, or even a decrease in the amplitude level at the resonance frequencies, this making it possible to obtain a less vibrating board on the edge, more anchored on its trajectory, the user enjoying the comfort obtained due to the reduction of vibrations. The elongated element being formed of three layers of elastomer-reinforcement-elastomer type, this makes it possible to choose the stiffness of the beater, more precisely by the choice of the central reinforcing layer and the damping of the beater by the choice of the elastomeric side layers. . In addition, the presence of the central reinforcement makes it possible to avoid significant transverse deformation and breakage between the two parts of the core, and allows elastomeric shear layers to be created inside to dissipate the energy and dampen the vibration level. .

L'invention peut être mise en oeuvre sur différents types de noyaux, et en particulier les noyaux réalisés en bois, ou en mousse injectée, typiquement à base de polyuréthane.The invention can be implemented on different types of cores, and in particular the cores made of wood, or injected foam, typically based on polyurethane.

En pratique, l'élément longiligne s'étend sur une partie de la longueur de la planche, voire sur l'intégralité de la longueur du noyau. Dans le premier cas, il peut être localisé à différents niveaux de la planche, soit à l'avant, soit à l'arrière, avec de préférence une présence au niveau où les efforts sur les carres sont exercés pendant les phases de virage, à savoir au niveau de la zone où est implantée la fixation.In practice, the elongate element extends over a portion of the length of the board, or even over the entire length of the core. In the first case, it can be located at different levels of the board, either at the front or at the back, preferably with a presence at the level where the forces on the edges are exerted during the turning phases, namely at the area where the attachment is located.

Dans le premier cas, l'élément longiligne caractéristique est associé aux autres parties du noyau avant moulage, ou encore pendant le moulage. Dans le cas d'un ski injecté, l'élément caractéristique peut être mis en place à l'intérieur du moule, et délimite deux volumes dans lesquels sera injectée la mousse du noyau pendant l'opération de moulage.In the first case, the characteristic elongate element is associated with the other parts of the core before molding, or during molding. In the case of an injected ski, the characteristic element can be put in place inside the mold, and delimits two volumes in which the foam of the core will be injected during the molding operation.

En pratique, l'élément longiligne peut présenter une couche centrale réalisée en un matériau choisi dans le groupe comprenant l'aluminium, l'acrylonitrile butadiène styrène (ABS), ou encore les matériaux composites à base de fibres longues ou courtes.In practice, the elongated element may have a central layer made of a material selected from the group consisting of aluminum, acrylonitrile butadiene styrene (ABS), or composite materials based on long or short fibers.

En pratique, on constate de bons résultats en matière d'accroche de la planche dans les virages lorsque le matériau de la couche centrale présente un module de Young transversal supérieur à trois fois le module de Young du matériau du noyau, de préférence supérieur à dix fois.In practice, good results are obtained in terms of boarding of the board when cornering when the material of the central layer has a transverse Young's modulus greater than three times the Young's modulus of the core material, preferably greater than ten times.

En pratique, la couche centrale de l'élément longiligne peut présenter une largeur comprise entre 0,3 et 4 mm, préférentiellement entre 0,6 et 2 mm.In practice, the central layer of the elongate element may have a width of between 0.3 and 4 mm, preferably between 0.6 and 2 mm.

Il est possible d'ajuster les propriétés mécaniques souhaitées en faisant varier à la fois la largeur de la couche centrale de l'élément longiligne, et le matériau employé. Ainsi, on a obtenu de bons résultats lorsque la combinaison de ces paramètres fait que le produit entre la largeur de la couche centrale et le module d'Young du matériau qui la constituent est supérieur à 10000 mm.MPa, et de préférence à 30000 mm.MPa.It is possible to adjust the desired mechanical properties by varying both the width of the central layer of the elongate member, and the material employed. Thus, good results have been obtained when the combination of these parameters makes the product between the width of the central layer and the Young's modulus of the material constituting it greater than 10000 mm.MPa, and preferably greater than 30000 mm. .mpa.

En pratique, les couches latérales de l'élément longiligne peuvent être réalisées en un matériau choisi dans le groupe comprenant le caoutchouc, les polyuréthanes thermoplastiques, les styrène-éthylène-butadiène-styrènes (SEBS), ou bien encore d'autres matériaux aux propriétés élastomériques.In practice, the side layers of the elongate element may be made of a material chosen from the group comprising rubber, thermoplastic polyurethanes, styrene-ethylene-butadiene-styrenes (SEBS), or else other materials with properties elastomeric.

En pratique, le matériau des couches latérales peut avantageusement être un matériau viscoélastique, qui présente un coefficient d'amortissement suffisant, et optimisé pour un fonctionnement sur une plage de température allant de -20°C et +5°C, ce qui permet d'assurer une dissipation efficace de l'énergie mécanique générée dans la structure lors de la déformation de la planche.In practice, the material of the lateral layers may advantageously be a viscoelastic material, which has a sufficient damping coefficient, and optimized for operation over a temperature range of -20.degree. C. and + 5.degree. ensure an efficient dissipation of the mechanical energy generated in the structure during the deformation of the board.

En pratique, ces couches latérales peuvent avantageusement présenter une largeur comprise entre 0,1 et 1 mm, préférentiellement entre 0,3 et 0,7 mm.In practice, these lateral layers may advantageously have a width of between 0.1 and 1 mm, preferably between 0.3 and 0.7 mm.

En particulier, dans le cas où la planche est destiné à la pratique du ski alpin, on obtient par exemple un premier type de ski confortable en utilisant un élément longiligne composé d'une couche de centrale en ABS d'épaisseur 2mm recouverte sur chacun de ses deux côtés latéraux d'une couche de caoutchouc de 0.5mm d'épaisseur. On peut obtenir un second type de ski confortable et plus performant en utilisant un élément longiligne composé d'une couche de centrale en aluminium d'épaisseur 0.6mm recouverte sur chacun de ses deux côtés latéraux d'une couche de caoutchouc de 0.5mm d'épaisseur.In particular, in the case where the board is intended for the practice of alpine skiing, one obtains, for example, a first type of comfortable ski by using an elongated element composed of a central layer of ABS of thickness 2mm covered on each of its two lateral sides with a rubber layer of 0.5mm thick. A second type of comfortable and more efficient ski can be obtained by using an elongated element composed of a 0.6mm thick aluminum core layer covered on each of its two lateral sides with a 0.5mm rubber layer. thickness.

Le principe de l'invention peut être décliné en incluant plusieurs éléments longilignes analogues disposés parallèlement, soit espacés les uns des autres de manière à former un nombre plus important de portions du noyau pour créer plusieurs batteurs dynamiques, soit jointifs les uns aux autres pour modifier les paramètres du batteur dynamique et en particulier ses paramètres de masse, raideur et/ou amortissement.The principle of the invention can be declined by including a plurality of similar elongated elements arranged in parallel, or spaced from each other so as to form a larger number of portions of the core to create multiple dynamic drummers, or joined to each other to modify the parameters of the dynamic mixer and in particular its parameters of mass, stiffness and / or damping.

Description sommaire des figuresBrief description of the figures

La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description du mode de réalisation qui suit, à l'appui des figures annexées dans lesquelles :

  • la figure 1 est une vue en coupe transversale d'une planche de glisse conforme à l'invention,
  • la figure 2 est une vue de détail de la zone II de la figure 1.
  • la figure 3 est une vue de dessus du noyau de la planche de la figure 1.
The manner of carrying out the invention, as well as the advantages which result therefrom, will emerge from the description of the embodiment which follows, in support of the appended figures in which:
  • the figure 1 is a cross-sectional view of a gliding board according to the invention,
  • the figure 2 is a detailed view of the area II figure 1 .
  • the figure 3 is a top view of the core of the board of the figure 1 .

Bien entendu, les dimensions et les proportions de certains éléments constitutifs de l'invention ont pu être déformés, exagérés et s'écarter de la réalité, dans le but de bien faire comprendre l'invention.Of course, the dimensions and proportions of certain constituent elements of the invention may have been deformed, exaggerated and deviate from reality, in order to make the invention clearly understood.

Manière de réaliser l'inventionWay of realizing the invention

Telle qu'illustrée à la figure 1, la planche de glisse 1 comporte un ensemble inférieur 2, et un ensemble supérieur 3, séparés par un noyau 4. Plus précisément, l'ensemble inférieur 2 comporte une semelle de glisse 7, typiquement à base de polyéthylène, sur laquelle reposent latéralement les ailettes des carres métalliques 8. Dans la forme illustrée, cet ensemble inférieur 2 inclut également une couche de renfort 9. Cette couche peut être réalisée à partir de différents matériaux et notamment à base de métal, ou préférentiellement pour des questions de poids global, par des matériaux composites, incluant des fibres de haute ténacité, tel que du verre, de l'aramide, du basalte ou analogue, principalement orientés parallèlement à l'axe longitudinal de la planche. Il est bien entendu possible que l'ensemble inférieur 2 inclue plusieurs couches de renfort, de nature et de dimension similaires ou différentes, sans sortir du cadre de l'invention.As illustrated in figure 1 , the gliding board 1 comprises a lower assembly 2, and an upper assembly 3, separated by a core 4. More specifically, the lower assembly 2 comprises a gliding sole 7, typically based on polyethylene, on which the fins of metal edges 8. In the form shown, this lower assembly 2 also includes a reinforcing layer 9. This layer can be made from different materials and in particular based on metal, or preferably for questions of overall weight, by composite materials, including high tenacity fibers, such as glass, aramid, basalt or the like, mainly oriented parallel to the longitudinal axis of the board. It is of course possible that the lower assembly 2 includes several reinforcement layers of a similar or different nature and size, without departing from the scope of the invention.

La planche 1 inclut également un ensemble supérieur, qui comporte en partant du haut une couche 11 de décoration et de protection, reposant sur une couche de renfort 12. La couche 11 de décoration et de protection peut être réalisée de différentes manières, et inclure sur sa face inférieure des zones imprimées apparentes depuis la face supérieure de la planche, ou bien encore des zones transparentes, permettant de rendre apparente depuis l'extérieur la couche de renfort 12. De multiples variantes de réalisation peuvent être envisagées en ce qui concerne cette couche de décoration et de protection, sans sortir du cadre de l'invention.The board 1 also includes an upper assembly, which comprises from the top a decorative and protective layer 11 , resting on a reinforcing layer 12. The decoration and protection layer 11 can be made in different ways, and include on its underside of the printed areas apparent from the upper face of the board, or even areas transparent, to make apparent from the outside the reinforcing layer 12. Multiple alternative embodiments can be envisaged with respect to this decorative layer and protection, without departing from the scope of the invention.

Dans la forme illustrée, l'ensemble supérieur 3 comporte une couche de renfort 12, qui peut être également réalisée de différentes manières, et notamment en métal ou préférentiellement en matériau composite. Cette couche de renfort 12 peut adopter différentes géométries en fonction de la géométrie globale de la planche, et en particulier de la forme éventuellement tridimensionnelle de la face supérieure de la planche. Cette couche peut également être multiple, en combinant différentes épaisseurs de nature identique, similaire ou différente.In the form shown, the upper assembly 3 comprises a reinforcing layer 12, which may also be made in different ways, and in particular metal or preferably composite material. This reinforcing layer 12 can adopt different geometries depending on the overall geometry of the board, and in particular the possibly three-dimensional shape of the upper face of the board. This layer can also be multiple, by combining different thicknesses of identical nature, similar or different.

Les ensembles supérieur 3 et inférieur 2 sont séparés principalement par le noyau 4, qui est bordé latéralement par les chants 5 qui protègent le noyau de l'humidité extérieure, et qui assurent la transmission des efforts depuis l'ensemble supérieur à destination des carres 8. The upper 3 and lower 2 assemblies are separated mainly by the core 4, which is laterally bordered by the edges 5 which protect the core from the external moisture, and which ensure the transmission of forces from the upper assembly towards the edges 8 .

Selon un aspect de l'invention, ce noyau 4 présente une structure particulière, puisqu'il inclut un élément longiligne 20, qui sépare le noyau 4 en deux parties latérales gauche 21, et droite 22. Cet élément longiligne s'étend comme illustré à la figure 3 sur toute la longueur du noyau, le long de son plan longitudinal médian. Toutefois, dans d'autres variantes non représentées, cet élément longiligne peut être moins long, et ne s'étendre que sur une partie seulement de la longueur du noyau.According to one aspect of the invention, this core 4 has a particular structure, since it includes an elongated element 20, which separates the core 4 into two left side portions 21 and 22. This elongate element extends as illustrated in FIG. the figure 3 along the entire length of the core, along its median longitudinal plane. However, in other variants not shown, this elongate member may be shorter, and extend only over a portion of the length of the core.

Comme illustré à la figure 2, cet élément longiligne 20 s'étend verticalement entre les ensembles supérieur 3 et inférieur 2 et présente une hauteur identique à celle du noyau. Dans d'autres variantes, l'élément longiligne peut être plus haut que le noyau et s'insérer entre deux parties d'un renfort supérieur (ou inférieur), en pénétrant dans l'ensemble supérieur (ou inférieur selon le cas). Dans une variante non illustrée, l'ensemble supérieur ou inférieur peuvent chacun inclure une couche localisée, destinée à faire l'interface entre l'élément longiligne et le reste de l'ensemble supérieur ou inférieur.As illustrated in figure 2 This elongate member 20 extends vertically between the upper 3 and lower sets 2 and has an identical height to that of the nucleus. In other embodiments, the elongate member may be higher than the core and fit between two portions of an upper (or lower) brace, penetrating the upper (or lower as appropriate) assembly. In variant not shown, the upper or lower assembly may each include a localized layer for interfacing between the elongate member and the remainder of the upper or lower assembly.

Cet élément longiligne 20 se compose de plusieurs couches assemblées verticalement, et interposées entre les deux parties 21, 22 du noyau. La couche centrale 30 de l'élément longiligne est réalisée en un matériau nettement plus rigide que le reste du noyau, et plus précisément qui possède un module de Young dans le sens transversal nettement plus élevé que celui du matériau constituant le reste du noyau.This elongated element 20 is composed of several vertically assembled layers interposed between the two parts 21, 22 of the core. The central layer 30 of the elongate element is made of a material much more rigid than the rest of the core, and more precisely which has a Young's modulus in the transverse direction significantly higher than that of the material constituting the remainder of the core.

Différents matériaux peuvent être employés pour réaliser cette couche centrale 30, et en particulier des matériaux métalliques et notamment à base d'aluminium tel que l'alliage d'aluminium 7075, également connu sous l'appellation « Zicral ». De bons résultats ont été obtenus avec une épaisseur e1 de cette couche centrale 30 voisine de 0,6 mm. Le module de Young transversal de ce matériau est voisin de 70 000 MPa, à comparer avec le module de Young transversal des bois utilisés pour la fabrication de noyaux, est généralement compris entre 500 et 1 000 MPa. On notera en particulier que compte tenu de l'orientation essentiellement longitudinale des fibres du bois utilisé pour la fabrication des noyaux, le module de Young dans le sens longitudinal de ces matériaux est généralement plus élevé, entre 5000 et 15000 MPa.Various materials may be used to produce this central layer 30, and in particular metal materials and in particular aluminum-based materials such as aluminum alloy 7075, also known as "Zicral". Good results have been obtained with a thickness e 1 of this central layer 30 close to 0.6 mm. The transverse Young's modulus of this material is close to 70,000 MPa, compared with the transverse Young's modulus of wood used for the manufacture of cores, is generally between 500 and 1000 MPa. It will be noted in particular that, given the essentially longitudinal orientation of the wood fibers used for making the cores, the Young's modulus in the longitudinal direction of these materials is generally higher, between 5000 and 15000 MPa.

Dans une variante de réalisation, on peut utiliser pour former la couche centrale 30 de l'élément longiligne 20 un matériau polymérique, et en particulier de l'ABS, avec une épaisseur e1 de l'ordre de 2 mm, ce matériau présentant un module de Young de l'ordre de 1 800 MPa.In an alternative embodiment, a polymeric material, and in particular ABS, with a thickness e 1 of the order of 2 mm may be used to form the central layer 30 of the elongate element 20 , this material having a Young's modulus of the order of 1,800 MPa.

Conformément à l'invention, cette couche centrale 30 est bordée de deux couches latérales 31, 32 qui sont en un matériau élastomérique. De bons résultats ont été obtenus en utilisant du caoutchouc, d'une épaisseur e2 de l'ordre de 0,5 mm.According to the invention, this central layer 30 is lined with two lateral layers 31, 32 which are made of an elastomeric material. Good results were obtained using rubber, a thickness e 2 of the order of 0.5 mm.

Les différentes couches de l'élément longiligne sont assemblées entre elles et avec le reste du noyau par collage par exemple.The different layers of the elongate element are assembled together and with the rest of the core by gluing, for example.

On a constaté grâce à la présence de l'élément longiligne caractéristique une augmentation de la raideur en flexion du noyau. Etant entendu que l'essentiel de la rigidité en flexion de la planche est conférée par la présence des couches de renfort des ensembles supérieur et inférieur, l'impact de cette augmentation de rigidité en flexion du noyau sur celle de la planche est toutefois marginal. Parallèlement, on note une élévation de la raideur en flexion transversale et en torsion du noyau. En effet, en particulier dans le cas où les couches de renfort des ensembles supérieur et inférieur sont à base de matériaux fibreux unidirectionnels, orientés longitudinalement, la raideur en flexion transversale conférée par ces renforts est relativement limitée par rapport à celle mesurée dans le sens longitudinal. L'apport de la rigidité de l'élément longiligne caractéristique est particulièrement important pour le comportement dynamique de la planche. On a également observé une augmentation de la raideur en torsion grâce à la présence de l'élément longiligne caractéristique.Due to the presence of the characteristic slender element, an increase in the bending stiffness of the core has been observed. Given that most of the bending stiffness of the board is conferred by the presence of the reinforcing layers of the upper and lower sets, the impact of this increase in bending stiffness of the core on that of the board is however marginal. At the same time, there is an increase in the stiffness in transverse flexion and torsion of the core. Indeed, in particular in the case where the reinforcing layers of the upper and lower assemblies are based on unidirectional fibrous materials oriented longitudinally, the stiffness in transverse flexion imparted by these reinforcements is relatively limited compared to that measured in the longitudinal direction. . The contribution of the rigidity of the characteristic slender element is particularly important for the dynamic behavior of the board. An increase in torsional stiffness has also been observed due to the presence of the characteristic slender element.

Complémentairement, l'emploi d'un matériau élastomérique, et avantageusement viscoélastique, permet de générer des phénomènes de cisaillement vertical lors de la déformation en flexion de la planche, avec une dissipation d'énergie permettant d'engendrer un certain amortissement.Complementarily, the use of an elastomeric material, and advantageously viscoelastic, makes it possible to generate vertical shear phenomena during the bending deformation of the board, with a dissipation of energy to generate a certain damping.

Globalement, le comportement d'une planche conforme à l'invention, et en particulier son comportement dynamique sur la neige, permet d'obtenir une planche avec une accroche améliorée, lorsque la planche est sur la carre et une inscription dans les courbes plus nette du fait de l'atténuation des vibrations, la planche restant plus facilement inscrite sur sa trajectoire. Parallèlement l'effet d'amortissement engendré par l'association d'un matériau rigide et d'un matériau élastomérique au sein de l'élément longiligne apporte à la planche une certaine douceur dans la déformation, et donc une planche plus confortable pour l'utilisateur.Overall, the behavior of a board according to the invention, and in particular its dynamic behavior on the snow, makes it possible to obtain a board with improved grip when the board is on the edge and an inscription in the sharper curves. because of the attenuation of the vibrations, the board remaining more easily inscribed on its trajectory. In parallel, the effect damping caused by the combination of a rigid material and an elastomeric material within the elongated element provides the board a certain softness in the deformation, and therefore a more comfortable board for the user.

Bien entendu, même si l'invention a été décrite dans les exemples pour une structure de type « sandwich », elle peut également s'appliquer pour des structures globales dites « à coque », dans lequel l'ensemble supérieur se prolonge latéralement verticalement jusqu'à rejoindre l'ensemble inférieur à l'aplomb des carres, en englobant le noyau sans nécessiter de chants latéraux.Of course, even if the invention has been described in the examples for a "sandwich" type structure, it can also be applied to global "shell" structures, in which the upper assembly extends laterally vertically 'to join the lower set at the edge of the edges, encompassing the core without requiring side edges.

Claims (10)

Planche de glisse sur neige (1), présentant une structure incluant : • un ensemble inférieur formé (2) d'une semelle de glisse bordée (7) de carres (8) et d'une ou plusieurs couches (9) de renfort inférieur ; • un ensemble supérieur (3) formé d'une ou plusieurs couches de renfort supérieur (12) et d'une couche supérieure de protection et de décoration (11) ; • un noyau (4) interposé entre les ensembles (9) inférieur et supérieur (3) ; • un élément longiligne (20) s'étendant dans le sens longitudinal de la planche, séparant le noyau en deux parties (21, 22), et venant au contact des ensembles supérieur (3) et inférieur (2), caractérisée en ce que l'élément longiligne (20) est formé par l'assemblage d'au moins trois couches s'étendant verticalement entre les ensembles supérieur (3) et inférieur (2), les trois couches comprenant une couche centrale (30) réalisée en un matériau présentant un module de Young transversal supérieur au module de Young transversal du matériau composant le noyau (21, 22), et deux couches latérales (31, 32) venant au contact de la couche centrale (30), et réalisées en un matériau élastomérique.Snow sliding board (1), having a structure including: • a lower assembly formed (2) of a bordered gliding sole (7) of edges (8) and one or more layers (9) of lower reinforcement; An upper assembly (3) formed of one or more upper reinforcing layers (12) and an upper protective and decorative layer (11); A core (4) interposed between the lower and upper sets (9) (3); An elongate element (20) extending in the longitudinal direction of the board, separating the core into two parts (21, 22), and coming into contact with the upper (3) and lower (2) assemblies, characterized in that the elongate member (20) is formed by assembling at least three vertically extending layers between the upper (3) and lower (2) assemblies, the three layers comprising a core layer (30) made of a material having a transverse Young's modulus greater than the transverse Young's modulus of the material constituting the core (21, 22), and two lateral layers (31, 32) coming into contact with the central layer (30), and made of an elastomeric material. Planche de glisse selon la revendication 1, caractérisée en ce que le noyau (21, 22) est réalisé en bois.Gliding board according to claim 1, characterized in that the core (21, 22) is made of wood. Planche de glisse selon la revendication 1, caractérisée en ce que le noyau (21, 22) est réalisé en mousse injectée, typiquement à base de polyuréthane.Gliding board according to claim 1, characterized in that the core (21, 22) is made of injected foam, typically based on polyurethane. Planche de glisse selon la revendication 1, caractérisée en ce que la couche centrale (30) est réalisée en un matériau choisi dans le groupe comprenant l'aluminium, l'acrylonitrile butadiène styrène, les matériaux composites à base de fibres.Gliding board according to claim 1, characterized in that the central layer (30) is made of a material selected from the group consisting of aluminum, acrylonitrile butadiene styrene, composite materials based on fibers. Planche de glisse selon la revendication 1, caractérisée en ce que le matériau de la couche centrale (30) présente un module de Young transversal supérieur à dix fois le module de Young du matériau du noyau.Gliding board according to claim 1, characterized in that the material of the central layer (30) has a transverse Young's modulus greater than ten times the Young's modulus of the core material. Planche de glisse selon la revendication 1, caractérisée en ce que la couche centrale (30) présente une largeur comprise entre 0,3 et 4 mm.Gliding board according to claim 1, characterized in that the central layer (30) has a width of between 0.3 and 4 mm. Planche de glisse selon la revendication 1, caractérisée en ce que le produit entre la largeur de la couche centrale et le module de Young du matériau qui la constitue est supérieur 10 000 mm.Mpa.Gliding board according to claim 1, characterized in that the product between the width of the central layer and the Young's modulus of the material constituting it is greater than 10,000 mm.Mpa. Planche de glisse selon la revendication 1, caractérisée en ce que les couches latérales (31, 32) sont réalisées en un matériau choisi dans le groupe comprenant le caoutchouc, les polyuréthanes thermoplastiques, les styrène-éthylène-butadiène-styrène.Gliding board according to claim 1, characterized in that the side layers (31, 32) are made of a material selected from the group consisting of rubber, thermoplastic polyurethanes, styrene-ethylene-butadiene-styrene. Planche de glisse selon la revendication 1, caractérisée en ce que les couches latérales présentent une largeur comprise entre 0,1 et 1 mm, préférentiellement entre 0,3 et 0,7 mm.Gliding board according to claim 1, characterized in that the side layers have a width of between 0.1 and 1 mm, preferably between 0.3 and 0.7 mm. Planche de glisse selon la revendication 1, caractérisée en ce qu'elle comporte plusieurs éléments longilignes analogues disposés parallèlement dans le sens transversal.Gliding board according to claim 1, characterized in that it comprises a plurality of similar elongate elements arranged in parallel in the transverse direction.
EP18177628.7A 2017-06-16 2018-06-13 Glideboard Active EP3415206B1 (en)

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EP2384464A2 (en) 2009-01-30 2011-11-09 Microsoft Corporation Standard gestures
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Publication number Priority date Publication date Assignee Title
FR2437225A1 (en) * 1978-09-28 1980-04-25 Bekaert Sa Nv ADVANCED SKIING
AT388875B (en) 1987-08-12 1989-09-11 Rohrmoser Alois Skifabrik SKI
FR2655864A1 (en) 1989-11-16 1991-06-21 Rohrmoser Alois Skifabrik SANDWICH CONSTRUCTION ELEMENT WITH A MODELING LAYER FOR SKIING.
EP2384464A2 (en) 2009-01-30 2011-11-09 Microsoft Corporation Standard gestures
US20110206895A1 (en) 2010-01-26 2011-08-25 Drake Powderworks Llc Carbon fiber laminate ski or snowboard with metal rib core dampening system
EP2384964A1 (en) * 2010-05-07 2011-11-09 Salomon S.A.S. Snowboard or surfboard
EP3037141A1 (en) * 2014-12-23 2016-06-29 Skis Rossignol Snowboard with complex sidewalls

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Publication number Publication date
FR3067615A1 (en) 2018-12-21
EP3415206B1 (en) 2020-12-02
FR3067615B1 (en) 2019-07-19

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