EP3981481A1 - Strukturelement eines gleitbretts und herstellungsverfahren - Google Patents

Strukturelement eines gleitbretts und herstellungsverfahren Download PDF

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Publication number
EP3981481A1
EP3981481A1 EP21199288.8A EP21199288A EP3981481A1 EP 3981481 A1 EP3981481 A1 EP 3981481A1 EP 21199288 A EP21199288 A EP 21199288A EP 3981481 A1 EP3981481 A1 EP 3981481A1
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EP
European Patent Office
Prior art keywords
structural element
portions
element according
junction
junction portions
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.)
Pending
Application number
EP21199288.8A
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English (en)
French (fr)
Inventor
Jacky Christoud
Emanuele CASSIBBA
Grégory Merle
Thierry Monnet
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
Original Assignee
Skis Rossignol SA
Rossignol SA
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 Skis Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP3981481A1 publication Critical patent/EP3981481A1/de
Pending legal-status Critical Current

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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

Definitions

  • the invention relates to the field of sliding sports and in particular sliding sports on snow. It relates more particularly to a gliding board structure whose core and/or edges are lightened while retaining high mechanical properties.
  • a gliding board is composed of a lower assembly, including the gliding sole and at least one layer of mechanical, fibrous or metallic reinforcement, and an upper assembly also including at least one layer of mechanical, fibrous or metallic reinforcement.
  • metal on which the user's foot support devices are installed are installed.
  • the side faces of the board are generally equipped with elements called edges, forming the laterally visible zone of the structure, having in particular the function of protecting the core from external aggressions, and in particular from mechanical impacts, or infiltrations of water or snow.
  • edges are generally produced by a monolithic element, in a relatively mechanically resistant material, such as acrylonitrile butadiene styrene (ABS).
  • ABS acrylonitrile butadiene styrene
  • This edging element is interposed between the upper assembly and the lower assembly, and rests in particular on the metal edges bordering the gliding sole.
  • these edge elements also have the function of ensuring the correct transmission of the forces exerted by the user from the upper face onto the edges of the board. This is why it is useful for these edge elements to be made of a material which has good resistance to vertical compression.
  • edge elements a particular structure, possibly by integrating zones in a viscoelastic material, so as to ensure a certain damping of the vibrations passing from the edges to the upper face of the ski and in particular in the zone where the foot of the user rests.
  • a device nevertheless remains massive, and contributes negligibly to the overall mass of the board.
  • the areas including the viscoelastic material are made by recesses of the monolithic element.
  • the area of the edging element closest to the core thus exhibits, in terms of compression, the intrinsic behavior of the material constituting the bulk of the edging element, so that the compression of the viscoelastic material is observed almost exclusively near from the outer side of the edge.
  • a similar device is described in the document FR 2 891 751 .
  • the main function of the core which is to distance the reinforcements of the upper and lower assemblies with respect to the neutral fiber, implies that the core must have a certain resistance to crushing in order to maintain this distance constant. This is why the cores are traditionally made from incompressible materials, whether wood or expanded foam, occupying the entire volume separating the lower and upper spaces.
  • Such a core if it has a lighter mass, on the other hand has a drawback in that it deforms excessively in bending, and that for example when bending the board upwards, the triangular patterns in contact of the lower set tend to move away from each other.
  • Similar solutions are described in the document US 6,502,849 , in which the patterns of the folded blade are rectangular or trapezoidal.
  • Other solutions are described in the documents FR 2 536 335 and AT 387 331 which combine by superposition several corrugated blades leading to a relative manufacturing complexity, and a limited weight gain.
  • One of the objectives of the invention is to lighten certain elements of the structure of a board for gliding while retaining high mechanical properties, whether it be crushing resistance and/or stiffness in bending of the board.
  • Another object of the invention is to provide structural elements whose mechanical properties can be adapted to the profile of the board, depending on the location of the zones having more or less stress to withstand.
  • the Applicant has imagined a gliding board element, having a particular structure.
  • the invention consists in producing the gliding board structural element as an essentially perforated structure, formed of two substantially planar surfaces, at the level of the upper and lower faces of the element. These surfaces are connected by bridging zones, which delimit cross passages between them transversely along the width of the structural element, from one side face to the other.
  • junction portions advantageously have a constant section, along planes parallel to the median longitudinal plane, corresponding for a ski for example to the vertical plane parallel to the long direction of the ski.
  • each of the junction portions has a section of constant shape by moving in a direction perpendicular to the median longitudinal plane.
  • junction portions are preferably hollow, that is to say they define a volume devoid of material which extends from one side face to the other of the structural element.
  • the structural element according to the invention comprises two upper and lower skins, connected by spacers forming tubular zones, the shape of each of which is the same from one side face to the other of the element of structure.
  • the mass of the structural element is very significantly reduced compared to traditional monolithic structural elements.
  • this reduction does not have a negative impact on the mechanical properties of the structural element, since the choice of materials constituting the junction portions, as well as their location, make it possible to optimize the crushing resistance of the part. .
  • the continuous architecture of the upper and lower walls, and the distribution of the junction portions between these two walls also ensure very good bending resistance properties.
  • the upper and lower walls are considered to be continuous in the sense that they ensure the mechanical connection between two successive junction portions, both on the top and the bottom of the structural element, so as to form a structure whose upper and lower faces transmit the tensile or compressive forces undergone during bending movements.
  • These walls can be solid or perforated as required.
  • this structural element with an identical section regardless of the longitudinal plane between the two side faces of the element, allows the latter to be manufactured easily, for example from an extruded profile, or even by three-dimensional printing techniques.
  • junction portions it is possible for adjacent junction portions to come into contact with each other, or conversely be spaced apart from each other without contact. This makes it possible in particular to modulate the mechanical properties, in particular the resistance to crushing or the reduction.
  • junction portions when the junction portions are in contact with each other, that is to say contiguous, the resistance to crushing and bending is greater than that of a structure with junction portions. of the same geometry, but spaced from each other, that is to say not contiguous.
  • this second structure is lighter.
  • a compromise has to be found depending on the objectives sought in terms of mechanical properties and lightening. Obviously, it is possible to mix these two types of geometry within a structural element in order, for example, to greatly lighten the portions least subject to mechanical stresses, or on the contrary to reinforce the mechanical properties of the most stressed zones.
  • junction portions can also be declined.
  • the junction portions may have a polygonal shape, in particular triangular or even rectangular.
  • the junction portions it is possible to adjust the mechanical properties of the structural element.
  • the structural element can have a constant thickness over its entire length, and therefore parallel lower and upper walls.
  • the thickness of the structural element is adapted to the variation in thickness of the board along the zone where the structural element will be added, in which case the distance separating the lower and upper walls of the structural element is variable over the length of the latter.
  • the dimensions of the junction portions may be adapted to the variation of the thickness profile.
  • the upper wall may be inclined relative to the lower wall so that the thickness of the structural element is lower on its outer side face than on its inner side face. In this case, the dimensions of the junction portions, or even their shape, vary across the width of the structural element, from one side face to the other.
  • junction portions may have a circular section of decreasing diameter moving towards the outside of the structural element, and form a truncated cone, or even have a circular section on the internal face of the structural element, which evolves into an elliptical section near the opposite face.
  • the structural element is covered by a closing wall.
  • This closure wall can be an upper wall, for example in the case where the structural element is a core, or even a side wall in the case of an edge element. In the latter case, the wall is then substantially parallel to the median longitudinal plane, that is to say extending from the lower wall to the upper wall, covering the junction portions.
  • this closing side wall may be intended to prevent the entry of snow when it is located on the visible face of the structural element, or to insulate the structural element of the core, in particular when it is made of injected material, on the opposite side face.
  • the structural element can be a core or an edge element. These two types of structure must have good properties of resistance to compression and bending.
  • additive manufacturing consists of depositing material layer by layer, the layers being stacked on top of each other either in the direction of the width of the structural element, or in the direction of the thickness of the structural element.
  • this method makes it possible by successive depositions to produce all or part of the structural element.
  • an additive manufacturing process is carried out by deposition on a plane corresponding to one side faces of the structural element.
  • this face which will be intended to be vertical during integration into the board, rests on a horizontal plane to allow the growth of the height of the part during the deposit of the material, up to a plane, more generally a surface, which will form the opposite side face.
  • the method includes a step of depositing a continuous one-dimensional fibrous element to form successive layers superimposed in a direction perpendicular to the median longitudinal plane.
  • the material that is deposited during the process includes a thread or a ribbon of small width without any discontinuity, preferably of a high tenacity material such as glass, carbon or certain natural fibers. This material is deposited in the planes parallel to the future lateral face of the structural element, that is to say planes parallel to the future median longitudinal plane of the structural element.
  • a one-dimensional fibrous element, impregnated with a hardenable resin is deposited on a reference plane parallel to the median longitudinal plane of the structural element, advantageously along a path covering successively and/or alternately the portions junction and the zones of the lower and/or upper wall separating two consecutive junction portions. This deposition is repeated on the same path, until a stack of a predetermined height is obtained, measured in the direction perpendicular to the median longitudinal plane of the structural element.
  • the one-dimensional fibrous element can be made in different ways, in particular in the form of a textile yarn, a roving, or even a woven ribbon of small width.
  • the one-dimensional fibrous element is based on a material having a modulus of elasticity greater than 10, or even 50 or 80 GPa, among which are glass, carbon, basalt, aramids, as well as certain natural fibers such as linen.
  • the reference plane which will constitute one of the side faces of the structural element, receives a deposit of the material integrating the fibrous reinforcement which continuously draws the profile of the junction portions.
  • This deposit connects one junction portion to the other along a segment of an upper or lower wall.
  • the deposit of the material is done on a trajectory which corresponds to the profile of the structural element along a plane parallel to the median longitudinal plane.
  • This deposition of the fibrous element being continuous, the result is a part which has a mechanical continuity favorable to the mechanical properties of the structural element, both vis-à-vis compression and bending.
  • the manufacturing method can be implemented by placing on the reference plane members delimiting at least in part the shape of the junction portions, to allow the deposition of the one-dimensional fibrous element around its members.
  • these members define the shape of the junction portions, and allow the fibrous reinforcement to remain in the desired configuration as the deposition progresses, so as to obtain junction portions having a constant section over the entire length. width of the structure element.
  • these reinforcements can be tubes around which the wire is wound, or even axes or points perpendicular to the reference plane, and around which the fiber reinforcement forms the angles present in the geometry of the junction portions . These organs are removed after hardening of the resin impregnating the fibrous reinforcement.
  • the deposition of the one-dimensional fibrous element can be carried out on a tape based on a material capable of adhering to the resin for impregnating the one-dimensional fibrous element.
  • this strip will form one of the side walls of the structural element.
  • the strip is intended to come into contact with the core, or to form the visible face of the gliding board so as to prevent snow from entering the openings of the structural element.
  • an added element can be clipped or glued to the side face of the structural element.
  • the top of the board can also come down on the structural element.
  • This structural element can also be subsequently filled by foam injection, partially or totally, during the manufacture of the board.
  • the invention more specifically described for a structural element can be applied to other internal structural elements of a gliding board. It can of course be the core of the board, which can adopt the above structure, as regards its geometry and its constitution.
  • the manufacturing method described above can be applied both to the production of a core and an edge element.
  • the invention is more particularly described below in a specific application of a structural element suitable for an alpine ski, but it of course covers applications to other types of gliding boards than, for example, snowboards and snowboards. cross-country skiing.
  • the structural element will be described as oriented such that its large dimension, parallel to that of the ski, is horizontal and that its lower wall is parallel to a horizontal plane, parallel to the base of the ski. In this way, its length corresponds to its dimension measured along the long dimension of the ski, its width is measured along a horizontal direction transverse to the ski and its thickness is measured vertically.
  • the structural element corresponds either to an edge element or to figures 1 to 6 , either to a nucleus or to figures 12 to 15 .
  • the figure 1 illustrates an alpine ski 1 having an upper face 2 a sole 3 and whose side faces 4 are equipped with a edging element 10 according to the invention.
  • This edge element 10 extends laterally over all or part of the length of the ski, between the heel 5 and the spatula 6.
  • this edge element has inner and outer side faces perpendicular to the plane of the base of the ski. In other embodiments not shown, these side faces and in particular the outer face, could be inclined with respect to the plane of the sole of the ski.
  • the characteristic edging element 10 extends in a zone where the thickness of the ski is sufficient, and is extended by a complementary monolithic element 9. More specifically, this edging element 10 comprises a lower wall 12 is an upper wall 11 which are respectively parallel to the sole 3 and to the upper layer 2 of the ski. These two upper 11 and lower 12 walls are interconnected by junction portions 15, which have a circular shape in the embodiment illustrated in figures 2 and 3 .
  • junction portions have a cylindrical shape, the axis of revolution of the cylinders of which is perpendicular to the median longitudinal plane 13, which is perpendicular to the lower wall 12, and which extends along the length of the element of song.
  • This median longitudinal plane 13 is, in the case of a ski, parallel to the median longitudinal plane of the ski itself. This plane is therefore substantially perpendicular to the plane of the sole of the ski parallel to the external lateral face of the ski and therefore of the edging element, as well as to the surface of the edging element opposite the core 8, such as illustrated the figure 4 .
  • junction portions 15 are separated from each other by through openings 16, extending from one side face to the other of the edge element, for example and preferably perpendicular to the median longitudinal plane 13. so, the junction portions 15 are not contiguous, but on the contrary spaced from each other.
  • the edge element is formed of only the lower 12 and upper 11 walls, at the level of the through opening 16.
  • the upper wall of the edge element 11 is in contact with the upper region 17 of the junction portion.
  • the lower wall 12 of the edge element is tangent to the lower region 18 of the junction portion 15.
  • the junction portion is located at intermediate heights between the upper 11 and lower 12 walls.
  • each junction portion circular in the case of figures 2 to 6 is constant regardless of the section plane parallel to the median longitudinal plane 13.
  • each junction portion has a continuous section over its entire width.
  • the characteristic structural element can be produced by an injection or extrusion process, but is preferably produced by additive manufacturing, or 3D printing.
  • the deposition of material can be done layer by layer, the layers being stacked on top of each other either in the direction of the width of the edge element, or in the direction of the thickness. of the singing element.
  • the deposition of material is carried out layer by layer, the layers being stacked in the direction of the width by the deposition of a continuous wire from the first layer to the last layer.
  • the edge element is made from a sheet 30 forming a support, on which have been placed members 31 delimiting the internal shape of the future junction portions.
  • This sheet 30 then receives the deposition of a resin-impregnated wire or tape type material delivered by a nozzle (not shown), which is deposited along a path 32 which follows the location of the future upper wall 41, passing from tangentially around the members 31.
  • a nozzle Around each member 31, the nozzle moves on a circular trajectory, forming a turn 35, intended to form the future junction portion 45.
  • the turns are circular, but they could adopt different shapes, triangular, or more generally polygonal, or even irregular shapes, since they are shapes with a closed outline in which the wire passes over itself.
  • the trajectory of the deposit 32 continues successively following the contour of each of the members 31, so as to form all of the junction portions.
  • this trajectory draws rectilinear fractions between each member 31, so as to constitute the future upper wall 41.
  • the trajectory of the deposit 32 starts again in the opposite direction, to create in a similar way the rectilinear segments which will form the future lower wall 42 of the edge element.
  • the nozzle can also traverse circles around the members 31, so as to form additional turns of the future junction portions. The process is continued iteratively, so that the trajectories of the nozzle are superimposed, and form whorls which are stacked both at the level of the upper 41 and lower 42 walls and of the junction portions 45. The number of iterations necessary is determined to obtain a sufficient deposit height, corresponding to the future width of the edge element.
  • the sheet 30 is arranged horizontally, at the start of manufacture, so that the turns are stacked vertically. Nevertheless, the vertical direction of this stack corresponds to a horizontal and transverse direction of the edging element once finished and positioned in the ski.
  • the sheet 30 can be kept to form the wall in contact with the core, or the wall in contact with the external environment in the edge element. This sheet can also be removed in some cases.
  • the continuity of the deposit 32 in particular due to the fact that the deposit incorporates a continuous mechanical element in the form of a wire or a ribbon, gives the finished edge element a very high mechanical integrity and properties high in terms of resistance to bending and torsion.
  • the resistance to crushing of the edge element is conferred by the shape of the junction portion 45, the number of junction portions as well as the intrinsic mechanical properties of the material deposited, and in particular of its core formed of at least one thread or of a textile tape based on a high tenacity material of the glass or carbon type or even formed of a natural fiber material of the flax, hemp or basalt type.
  • trajectory described above can be modified in different ways, for example by linking the upper wall segments of the edge element after each junction portion, or by alternating between each junction portion a segment of the wall upper and a segment of the lower wall, or by forming first one of the lower or upper walls, then the junction portions and finally the other of the upper or lower walls.
  • a 3D printing machine comprises a nozzle which delivers a thread or a ribbon impregnated with a resin which hardens after having been applied to a support surface.
  • the machine comprises a tank containing a bath of thermosetting resin or of a mixture of thermosetting and thermoplastic resins through which a fiber yarn passes before exiting through the nozzle to be deposited on the support surface.
  • the coated fiber which flows from the nozzle is then heated, for example by UV light, to be hardened by crosslinking phenomena.
  • the yarn coated with a thermoplastic material is used, which is heated inside the 3D printing machine to be softened and then applied to the support surface by flowing through the nozzle.
  • the thermoplastic material hardens as it cools. In the case of resins based on thermoplastic materials, it is necessary for these materials to have a sufficiently high softening temperature so that, when molding the ski, the edge retains its shape and does not soften.
  • the junction portions 115 are cylindrical, but contiguous from one portion to the other. Such a structure has a higher resistance to crushing, due to the contact existing between two adjacent junction portions. It will also be noted at the figure 7 , the fact that the junction portions have diameters which differ along the length of the edge element, and which adapt to the distance separating the curved upper 111 and flat lower 112 walls.
  • the junction portions are triangular in shape, and more specifically comprise planar segments 216 217, the upper ends of which come into contact with one another to form the vertex 218 of the triangle. Additionally, the lower portions of the segments 216 217 are also in contact with one triangular pattern to the other, such that two consecutive triangles are in contact with each other at the level of the lower end 219 of the same segments.
  • these triangular patterns can be spaced from each other, and not come into contact with each other, being spaced apart at a low apex or a high apex.
  • two low vertices will be connected by the lower wall while two high vertices will be connected by the upper wall.
  • junction portions have trapezoidal shapes. These junction portions 315 therefore consist of inclined walls 316 317, at opposite angles, individually ensuring the junction between the upper wall 311 and the lower wall 312. These trapezoidal portions are illustrated with a gap 320 between two adjacent junction portions.
  • the trapezoids can be contiguous, in this case then forming a V-shaped triangular pattern.
  • the geometry of the figure 9 has been adapted to take into account the variation in thickness of the edge element, corresponding to the variable distance between the upper 411 and lower 412 walls in order to adapt to the changing thickness curve of the gliding board .
  • the invention also covers the variants not shown in which the different geometries of the patterns mentioned above are mixed within the same edge element over the length of the edge element, by playing on the shape, the density and the proximity of the junction portions as a function of the desired mechanical properties, in particular as a function of the distribution of the stresses during use of the board.
  • this edge element may extend over the entire length of the edge or over only a portion of the edge of the ski.
  • the invention also covers the production of other portions of the structure of a board, and in particular the central core, as illustrated in figure 12 .
  • this board comprises a core 510, resting on the lower assembly 503, covered with the upper layer 502, and edged laterally with edge elements 504 505.
  • the core 510 similarly comprises an upper wall 511 and a lower wall 512, separated by junction portions 515 made analogously to similar regions of the edge element described above. As shown on the figure 12 , these junction portions 515 have a cylindrical shape, the axis of revolution of the cylinders of which is perpendicular to the median longitudinal plane 513, which is perpendicular to the lower wall 512, and which extends along the length of the core.
  • junction portions 515 are separated from each other by through openings 516, extending from one side face to the other of the core, for example and preferably perpendicular to the median longitudinal plane 513. In this way, the portions junction 515 are not contiguous, but on the contrary spaced from each other.
  • the core 510 has at the level of the greatest thickness of the junction portions 515, its upper wall 511 and its lower wall 512 which are tangent to the upper and lower regions of the junction portions 515.
  • the junction portions 515 are found at an intermediate height between the upper 511 and lower 512 walls of the element forming the core.
  • the core simply comprises its upper wall 511, in contact with the upper assembly 502, and its lower wall 512, coming into contact with the lower assembly 503.
  • the edging element or the core can be used in known manufacturing methods for manufacturing gliding boards.
  • the edging element and/or the core can be used in a traditional molding including fibrous composite materials combined with an impregnating resin, which forms the bonding resin for the various elements of the ski between them.
  • the edge element and/or the core can remain hollow, or be partially filled with resin.
  • the invention can also be used in the case of molding by injection of foam, for example of polyurethane, which makes it possible to bind all the elements of the ski together.
  • foam for example of polyurethane
  • the edge element and/or the core will be partially or completely filled with the injection foam.
  • plank structural elements according to the invention in particular the edge elements or the core, have great lightness, sufficient rigidity, with the possibility of adapting to a variation in thickness of the board, to adapt to the need for resistance to crushing and also to adapt to bending and/or torsion which vary over the length of the board.
EP21199288.8A 2020-09-30 2021-09-28 Strukturelement eines gleitbretts und herstellungsverfahren Pending EP3981481A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2009967A FR3114513B1 (fr) 2020-09-30 2020-09-30 Element de chant de planche de glisse et procede de fabrication

Publications (1)

Publication Number Publication Date
EP3981481A1 true EP3981481A1 (de) 2022-04-13

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EP21199288.8A Pending EP3981481A1 (de) 2020-09-30 2021-09-28 Strukturelement eines gleitbretts und herstellungsverfahren

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FR (1) FR3114513B1 (de)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT248306B (de) * 1963-03-04 1966-07-25 Hilde Steiner Ski, Gleitkufe, Schlittenkufe od. dgl. sowie Verfahren und Vorrichtung zu seiner Herstellung
DE2047705A1 (de) 1970-09-28 1972-03-30 Wintersberger, Lutz, 8024 Deisenhofen Ski-Unterkonstruktion
JPS52147129A (en) * 1976-06-02 1977-12-07 Nippon Gakki Seizo Kk Production method of ski
EP0078521A1 (de) * 1981-10-29 1983-05-11 Saico Selling And International Consulting Organisation S.R.L. Ski mit vergrössertem Trägheitsmoment und sein Herstellungsverfahren
FR2536335A1 (fr) 1982-11-22 1984-05-25 Fischer Gmbh Noyau de construction leger a structure cellulaire
FR2618344A1 (fr) * 1987-07-23 1989-01-27 Rohrmoser Alois Skifabrik Procede de fabrication de skis presentant differents amortissements d'oscillations et skis fabriques selon ce procede
FR2648721A1 (fr) * 1989-06-26 1990-12-28 Rohrmoser Alois Skifabrik Ski comprenant une bande stratifiee integree dans la bande superieure
FR2663236A1 (fr) 1990-05-09 1991-12-20 Rohrmoser Alois Skifabrik Ski avec une semelle superieure, une semelle inferieure et des joues laterales.
US6502849B1 (en) 1997-06-20 2003-01-07 Fuji Jukogyo Kabushiki Kaisha Skid plate
FR2891751A1 (fr) 2005-10-11 2007-04-13 Salomon Sa Planche de glisse ou de roulage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT387331B (de) 1986-03-20 1989-01-10 Rohrmoser Alois Skifabrik Verfahren zur herstellung eines als kern von skiern verwendbaren bauteiles

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT248306B (de) * 1963-03-04 1966-07-25 Hilde Steiner Ski, Gleitkufe, Schlittenkufe od. dgl. sowie Verfahren und Vorrichtung zu seiner Herstellung
DE2047705A1 (de) 1970-09-28 1972-03-30 Wintersberger, Lutz, 8024 Deisenhofen Ski-Unterkonstruktion
JPS52147129A (en) * 1976-06-02 1977-12-07 Nippon Gakki Seizo Kk Production method of ski
EP0078521A1 (de) * 1981-10-29 1983-05-11 Saico Selling And International Consulting Organisation S.R.L. Ski mit vergrössertem Trägheitsmoment und sein Herstellungsverfahren
FR2536335A1 (fr) 1982-11-22 1984-05-25 Fischer Gmbh Noyau de construction leger a structure cellulaire
FR2618344A1 (fr) * 1987-07-23 1989-01-27 Rohrmoser Alois Skifabrik Procede de fabrication de skis presentant differents amortissements d'oscillations et skis fabriques selon ce procede
FR2648721A1 (fr) * 1989-06-26 1990-12-28 Rohrmoser Alois Skifabrik Ski comprenant une bande stratifiee integree dans la bande superieure
FR2663236A1 (fr) 1990-05-09 1991-12-20 Rohrmoser Alois Skifabrik Ski avec une semelle superieure, une semelle inferieure et des joues laterales.
US6502849B1 (en) 1997-06-20 2003-01-07 Fuji Jukogyo Kabushiki Kaisha Skid plate
FR2891751A1 (fr) 2005-10-11 2007-04-13 Salomon Sa Planche de glisse ou de roulage

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FR3114513B1 (fr) 2023-11-24
FR3114513A1 (fr) 2022-04-01

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