EP2266672B1 - Snowboard - Google Patents

Snowboard Download PDF

Info

Publication number
EP2266672B1
EP2266672B1 EP10006280.1A EP10006280A EP2266672B1 EP 2266672 B1 EP2266672 B1 EP 2266672B1 EP 10006280 A EP10006280 A EP 10006280A EP 2266672 B1 EP2266672 B1 EP 2266672B1
Authority
EP
European Patent Office
Prior art keywords
gliding board
damping means
blade
ski
upper reinforcement
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.)
Active
Application number
EP10006280.1A
Other languages
German (de)
French (fr)
Other versions
EP2266672A1 (en
Inventor
Gilles Silva
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.)
Salomon SAS
Original Assignee
Salomon SAS
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 Salomon SAS filed Critical Salomon SAS
Publication of EP2266672A1 publication Critical patent/EP2266672A1/en
Application granted granted Critical
Publication of EP2266672B1 publication Critical patent/EP2266672B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/075—Vibration dampers
    • 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
    • A63C5/128—A part for the binding being integrated within the board structure, e.g. plate, rail, insert

Definitions

  • the present invention relates to a damping device for a gliding board, in particular an alpine ski, a cross-country ski, or a snowboard. It relates more particularly to an improvement of this type of device, and also relates to a ski equipped with it.
  • ski we already know different types of ski and there are many variants. These are constituted by an elongated beam whose front end is curved upwards to form a spatula, the rear end being also more lightly to form the heel.
  • the structure generally comprises peripheral protection elements, internal resistance elements to withstand bending and twisting stresses, and a core. These elements are assembled by gluing or injection, the assembly being generally performed hot in a mold having the final shape of the ski, with a front part strongly raised spatula, a rear part slightly raised in heel, a central part arched .
  • the document DE 29709403 discloses a gliding board with damping means constituted by a tunnel in which a friction piston is free to slide.
  • the friction piston may be constituted by a parallelepiped or by cylindrical rods.
  • the friction piston has a thickness that is greater than one third of the total thickness of the ski. This great thickness of the friction elements with respect to the total thickness of the ski induces a significant modification of ski characteristics, and in particular flexural and torsional characteristics.
  • the excessive thickness of the damping means with respect to the total thickness of the ski makes them close to the neutral fiber of the ski.
  • the neutral fiber of this beam corresponds to a dummy surface grouping all the points of the beam which are not subject to traction or compression. Means for damping a gliding board will be more effective than they will be away from the neutral fiber thereof. In the case of the ski described in DE 29709403 this characteristic is far from present.
  • the document EP 521 272 describes a ski with damping means constituted by a flexion blade connected to the ski by friction means.
  • Such a system has many drawbacks, and in particular those induced by the fact that it is a device outside the ski.
  • the installation of this device is mainly after the main manufacture of the ski, that is to say after the injection or molding of the ski.
  • the establishment on the outer face of the ski greatly hampers the decoration of the latter and in particular limits the possibilities of design, exterior look of the ski.
  • the document EP 733,386 describes a ski with damping means consisting of several lamellae placed one on the other.
  • the damping device is a device independent of the rest of the ski, consisting of a closed box in which are stacked the lamellae and the friction layers, which box is inserted between the upper reinforcement and the top of the ski, that is to say say the protective and decorative layer.
  • This is again a damping device that will significantly alter the mechanical characteristics of the ski because it is heavy and thick.
  • the document EP 966 992 describes a ski whose edges are equipped with filtering elements whose objective is to dampen only the parasitic vibrations that propagate between the edges and the top of the ski. These filter elements are made of flexible material and work by compression.
  • the present invention seeks to overcome the various disadvantages mentioned above and proposes a particularly simple, effective and reliable solution to vibration damping problems.
  • the object of the invention is also to provide a gliding board equipped with friction damping means, which damping means are simple and inexpensive to the extent that they can be integrated into the ski directly during the race. injection phase of the latter.
  • the damping device intended to damp the vibrations of a gliding board of length L comprising a main core placed between a lower subassembly and an upper subassembly, said subassembly upper, respectively said lower subset comprising at least a first upper reinforcement, respectively a first lower reinforcement, extending longitudinally over at least two-thirds of the length of said gliding board, and further comprising friction damping means;
  • said damping means comprise a blade less than 2 mm thick and means for sliding at least one end of said blade; in that said damping means are placed between said first lower reinforcement and said first upper reinforcement, and in that the distance separating said damping means from the first upper reinforcement, or said first lower reinforcement is between 0 mm and 4 mm. times the thickness of said blade, said damping means being as far away as possible from the neutral fiber of the gliding board.
  • the damping means according to the invention are particularly effective because they act on a large portion of the length of the gliding board and because they are distant, as much as possible, from the neutral fiber of the gliding board, which they be placed above or below it.
  • the weight added by the damping means is minimal compared to the damping they achieve and they can pass substantially unnoticed, modifying only very little mechanical characteristics of the gliding board.
  • they are placed under the first upper reinforcement, or on the first lower reinforcement they are completely integrated into the structure and have no effect on the outer shape of the ski.
  • the gliding board 1 shown at figure 1 is a ski 2 provided for the practice of alpine skiing.
  • the ski 2 is constituted by an elongated beam having its own distribution of thickness, width and therefore its own stiffness. It comprises a central part on which are fixed safety fasteners 3, which are formed in a known manner by a forward stop and a rear heel piece. In known manner, the ski has in the center of this central zone a line passing through it in a transverse direction or a marker called "shoe center” (MC).
  • the "middle of the shoe” is a help provided by the ski manufacturer facilitating for the user, or the professional who mounts the bindings, the positioning of these at the most suitable place on the ski.
  • the middle of the shoe (MC) represents the point of the ski which in correspondence of which is the center of the shoe.
  • a corresponding landmark is also mentioned on alpine ski boots or ski touring boots.
  • the front tip of the ski 2 is raised to form the spatula 25.
  • the rear tip of the ski 2 can also be raised to form the heel 26.
  • Between the central zone 24 and the spatula is defined what is generally called the front of the 27, while between the central zone 24 and the heel 26 is defined what is called the back of the ski 28.
  • the ski is therefore characterized by the following dimensions: the total length L measured between the rear tip of the ski to the front tip, the spatula length Ls measured between the point of contact before (Pca) and the front tip of the ski, the heel length Lt measured between the back tip of the ski and the heel contact point (Pct), the front contact length (Lca) measured between the middle of the boot and the point of contact with the front, and the heel contact length (Lct) measured between the heel contact point and the shoe center (MC).
  • the ski 2 shown in Figures 1 to 4 is a ski called "sandwich" construction. It is constituted in known manner by an intermediate structure 31 placed between a lower subassembly 5 and an upper subassembly 9.
  • the intermediate structure 31 comprises a main core 13 flanked by side edges 14.
  • the main core is made of wood and the side edges are made of ABS plastic material.
  • other materials are also conceivable within the scope of the invention.
  • other types of construction are also possible, self-supporting ski, box ski, etc. .
  • the lower subassembly 5 comprises a sliding sole 7, a first lower reinforcement 8, a second lower reinforcement 23 and two edges 6 placed on each side of the gliding sole 7.
  • the upper sub-assembly 9 is constituted by a layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12. Between the first upper reinforcement 11 and the second upper reinforcement 12 is placed a secondary core 15.
  • friction damping means 16 are placed inside the structure of the gliding board, near the first upper reinforcement 11 and under the latter.
  • the damping means are placed between the neutral fiber and the first upper reinforcement 11.
  • these means are placed between the first upper reinforcement 11 and the second upper reinforcement. 12.
  • These friction damping means comprise a blade 17 wrapped in a sleeve 18 and placed in contact with the first upper reinforcement 11.
  • the damping means 16 are integrally embedded inside the structure of the ski over their entire length LMA.
  • the complete integration of the damping means in the structure makes them completely impervious to the infiltration of any element (water, dust, etc ........) that can damage the operation.
  • the damping means may be completely hidden at the sight of the user of the ski, but it will be possible to provide translucent means at the core 13 and / or the upper subassembly 9, and / or the subset lower 5 so as to provide vision windows. These viewing windows will allow the user to see all or some portions of damping means.
  • damping means Another way to make visible the damping means will be to arrange them so that only part of them is embedded inside the structure. In this case, however, it will be necessary that a large part of the length Lma damping means is embedded in the structure of the ski and that sealing means are provided to prevent dust and water from entering the structure. inside the ski structure.
  • the figure 2 represents the ski according to the first embodiment of the invention in top view, partially cut so as to show the positioning of the damping means, that is to say of the blade 17 and its sheath 18.
  • the blade 17 extends over a large majority of the length of the ski. In fact, the blade extends from the proximity of the heel contact point to the proximity of the forward contact point (Pca).
  • the sheath 18 comprises two portions called front sheaths 32, rear 33. The two portions of the sheath 18 are not contiguous and leave in the center of the ski a portion of the blade uncovered, that is to say not wrapped by the sheath 18.
  • the zone of the blade which is not enveloped by the sheath 18 and which is thus directly in contact with the first upper reinforcement 11 will be completely attached to the latter and this in solidarity with the ski in the central area of it.
  • the portions of the blade 17 which are wrapped in the sheath 18 will retain their sliding capacity inside the sheath. And this, even if the sheath found itself fixed integrally to the reinforcement, and the secondary core 15.
  • the portion of the blade, which is fixed relative to the ski, that is to say the anchoring zone 19, must be in a range of length 600 mm centered on the middle shoe (MC) preferably in a range of 200 mm centered on the middle of the shoe.
  • An unrepresented variant of the first embodiment of the invention consists in replacing the anchoring zone 19 by a mechanical anchorage made by a rivet, a screw or a point crossing the blade.
  • the blade 17 is entirely wrapped in a sheath 18, which does not have any interruption in the central portion.
  • the sheath and the blade are drilled at the anchoring zone and the drilling cooperates with mechanical anchoring means rendering the blade integral with the rest of the ski in the central area of the ski.
  • the damping means extend over a large length of the front portion of the ski, and / or the rear portion thereof.
  • the damping means extend to the front and to the rear. If we consider the ski's rear tip as the origin of the length measurements, the front end of the blade is below the point of contact before (Pca) at the front of the ski, in a range of length (Ba) equal at 20% of the front contact length (Lca). The rear end of the blade is beyond the heel contact point (Pct) within a range of length (Bt) equal to 20% of the heel contact length (Lct).
  • the length of the ski is approximately equal to 1700 mm
  • the boot medium (MC) is placed at 727 mm from the rear tip of the ski.
  • the spatula has a length of 170 mm and the point of contact before Pca is located at a distance of 1530 mm from the rear tip of the ski.
  • the front contact length (Lca) is equal to 803 mm (1700-727-170) and the front end of the blade is positioned in the area defined by the following dimensions: 1409 mm and 1530 mm.
  • the length of the heel (Lt) is equal to 70 mm, so the heel contact length (Lct) is 757 mm.
  • the rear end of the blade is in the area defined by the following dimensions: 70 mm to 168.5 mm.
  • the damping means comprise a single metal blade made of a steel or aluminum type material whose thickness is between 0.4 mm and 0.7 mm. In practice, a blade 0.5 mm and about 12 mm wide was chosen.
  • the sheath 18 is made of a sheath made of a polyester fiber braid coated on its outer surface with polyurethane resin. You can also take a sheath made of a paper coated with silicone.
  • the means may possibly be made with a blade which would be coated over most of its length with a material preventing the bonding and adhesion with the resin of the upper reinforcement. This material, like the sheath, would have the function of preventing the blade from joining with the rest of the ski on all the portions thereof other than the anchoring zone 19.
  • the sizing of the blade, length and width is precisely defined by the desired friction properties. To do this, a test is made evaluating the sliding force required for a blade in a sheath, the sheath and the blade being previously placed in a test tube.
  • the Figures 10 and 11 show a specimen 35 for the evaluation test.
  • This consists of a stack of glass fabrics pre-impregnated with resin. On each side of the sheath, three layers of tissue (300x45 mm) are placed. Above and below, this stack is enveloped by larger layers (300x100 mm).
  • the sheath is 360 mm long, it protrudes on each side of the stack and is made of the material that is to be evaluated. The blade is longer than the sheath to provide a grip to perform the tensile test.
  • the firing cycle is carried out with a temperature and a time determined according to the prepreg chosen, then the specimen is allowed to stabilize for at least 24 hours. . After this time, we perform 4 pulls on the blade back and forth so as to break the system.
  • the test phase strictly speaking, takes place on a traction machine, the specimen being attached to it.
  • the slide is slid so as to leave only 200 mm inside the test piece.
  • the blade is then pulled by measuring the force required to slide the blade 30 mm. The reading of the average value gives an evaluation of the friction of the blade in the sheath.
  • the blade will be dimensioned, so that the average value of the force required for sliding is between 20 N and 80 N, preferably between 40 N and 60 N.
  • the slip test makes it possible to choose the dimensions of the blade, or blades, so as to obtain optimal damping of the gliding board under the conditions of use.
  • a blade having a thickness of between 0.4 mm and 1 mm a blade having a width of between 6 mm and 30 mm is chosen. In the case where several blades are placed side by side, the thickness of the blade is consequently reduced so that the sum of their width is between 6 mm and 30 mm.
  • the blade 17 is fixed by its central portion to the first upper reinforcement 11 during the stratification of the ski.
  • the first upper reinforcement 11 is made of fiberglass fabric pre-impregnated with resin.
  • the upper face of the blade which is not enveloped by the sheath will be bonded to the first upper reinforcement 11 with the resin.
  • the upper reinforcement is a metal reinforcement, for example in aluminum
  • the damping means are not directly in contact with the upper reinforcement, but only in the vicinity of the latter, it is possible to provide means for anchoring the blade with the core.
  • the damping means are above the neutral fiber. Therefore, when bending upwards of the front and rear tips of the ski, the ends of the blade will tend to get closer to the ski tips. For this to happen, expansion spaces have been provided to accommodate the ends of the blade.
  • Each of the caps 22 is constituted by a parallelepiped of slightly greater section than the section of the sleeve 18.
  • the cap is split to facilitate the penetration of the blade 17.
  • the caps are made of a material transparent, or translucent, and a window is made in the first upper reinforcement so as to make the ends of the blade visible from the outside of the ski. It is then possible to visually demonstrate the movement of the ends of the blade during bending. In normal use, the ends of the blade have a stroke of between 1 mm and 3 mm. To make more visible the movement of the ends of the blade, they are cut along a line oblique to the longitudinal axis.
  • the damping means is an addition of weight less than 100 g for a ski length 1700 mm, which represents a very limited weight given their effectiveness, in particular due to the fact that they act on a greater proportion of the length ski.
  • the figure 5 shows a perspective view in section of the ski according to a second embodiment of the invention. It is like in the previous mode of a so-called sandwich construction ski. It is constituted in known manner by an intermediate structure 31 placed between a lower subassembly 5 and an upper subassembly 9.
  • the intermediate structure 31 comprises a main core 13 flanked by side edges 14.
  • the upper subassembly 9 is constituted by a protective layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12.
  • the damping means are placed between the first upper reinforcement 11 and the second upper reinforcement 12.
  • the two upper reinforcements are placed one on the other , leaving between them only sufficient space for the establishment of damping means 16. These consist of a blade 17 secured to the upper reinforcements in the central area of the ski and slidable in a sleeve 18 .
  • the sleeve 18 is made by wrapping the blade in a silicone paper. It is a sheet of paper coated with silicone at 80 g / m 2 . The sheath wraps the blade over most of its length, leaving only the central portion of the sheath exposed. The central portion of the blade is secured between the second upper reinforcement 12, which is an aluminum plate, and the first upper reinforcement 11, which is constituted by a sheet of fiber fabrics impregnated with resin.
  • the figures 6 and 7 show a third embodiment of the invention wherein the damping means are constituted by two blades arranged substantially parallel. Preferably, each of the blades is disposed substantially parallel to the side line adjacent thereto.
  • the ski 2 comprises a lower sub-assembly 5, a core 13 and an upper sub-assembly 9.
  • the upper sub-assembly 9 is constituted by a protective layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12. Between the first upper reinforcement 11 and the second upper reinforcement 12 is placed a secondary core 15. Longitudinal housings are formed in the secondary core 15 to receive the damping means.
  • the figure 8 shows a fourth embodiment of the invention in which the damping means are placed in the main core near the first upper reinforcement 11.
  • the damping means 16 comprise a blade 17 completely wrapped in a sheath 18 in all its length. The blade and its sheath are pierced in their central portion.
  • the components of the ski including the damping means but excluding the core, are placed in the mold, then the material of the main core 13 (for example PU) is injected.
  • a spacer system (not shown) ensures, before the injection of the core, the correct positioning of the damping means with respect to the first upper reinforcement 11.
  • the proper positioning of the damping means is that in which the distance separating them from the first lower reinforcement is less than 4 times the thickness of said blade.
  • the blade has a thickness of 0.5 mm, so that the damping means are placed in such a way that the distance separating the upper surface of the sheath from the lower face of the lower reinforcement is less than 2 mm.
  • the damping means will be anchored to the ski during hardening of the core thanks to the material of the core which traps them.
  • the blade will be anchored at its central portion to the core through the material that has penetrated into the borehole therein.
  • the figure 9 shows a fifth embodiment of the invention.
  • the gliding board is a ski called sandwich structure. It consists of a lower subassembly 5, comprising a first lower reinforcement 8, a second lower reinforcement 23, a sliding sole 7 and a pair of edges 6; an upper subassembly 9 having a top 10 and a first upper reinforcement 11; as well as a single main core 13.
  • the core 13 is made of wood. In the lower part of the latter, a trench is made that can receive the damping means 16.
  • the damping means 16 are placed in contact with the first lower reinforcement 8. They comprise, as in the first embodiment, a blade 17 extending over a major part of the length of the ski and a sleeve 18 having a front sheath and a rear sheath. The two sheaths are disjointed so as to leave in the center an uncovered blade portion which is fixed to the structure of the ski by gluing during the polymerization of the resin of the first lower reinforcement 8.
  • the damping means are located above the first lower reinforcement and below the neutral fiber, and in particular further away from the latter, to ensure maximum efficiency.

Landscapes

  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)

Description

La présente invention se rapporte à un dispositif d'amortissement pour planche de glisse, notamment un ski alpin, un ski de fond, ou un surf des neiges. Elle est se rapporte plus particulièrement à un perfectionnement de ce type de dispositif, et concerne aussi un ski équipé de celui-ci.The present invention relates to a damping device for a gliding board, in particular an alpine ski, a cross-country ski, or a snowboard. It relates more particularly to an improvement of this type of device, and also relates to a ski equipped with it.

Il est connu de réaliser le corps du ski grâce à une structure plus ou moins souple.It is known to realize the body of the ski thanks to a more or less flexible structure.

On connaît déjà différents types de ski et il en existe de très nombreuses variantes. Ceux-ci sont constitués par une poutre de forme allongée dont l'extrémité avant est courbée vers le haut pour constituer une spatule, l'extrémité arrière l'étant aussi plus légèrement pour constituer le talon.We already know different types of ski and there are many variants. These are constituted by an elongated beam whose front end is curved upwards to form a spatula, the rear end being also more lightly to form the heel.

Les skis actuels ont généralement une structure composite dans laquelle sont combinés différents matériaux de manière que chacun d'eux intervienne de façon optimale, compte-tenu de la distribution des contraintes mécaniques lors de l'utilisation du ski. Ainsi, la structure comprend généralement des éléments de protection périphériques, des éléments internes de résistance pour résister aux contraintes de flexion et de torsion, et un noyau. Ces éléments sont assemblés par collage ou par injection, l'assemblage s'effectuant généralement à chaud dans un moule présentant la forme définitive du ski, avec une partie avant fortement relevée en spatule, une partie arrière légèrement relevée en talon, une partie centrale cambrée.Current skis generally have a composite structure in which different materials are combined so that each one of them intervenes in an optimal way, taking into account the distribution of the mechanical stresses during the use of the ski. Thus, the structure generally comprises peripheral protection elements, internal resistance elements to withstand bending and twisting stresses, and a core. These elements are assembled by gluing or injection, the assembly being generally performed hot in a mold having the final shape of the ski, with a front part strongly raised spatula, a rear part slightly raised in heel, a central part arched .

Malgré le souci des constructeurs de fabriquer des skis de bonne qualité, ceux-ci n'ont pas, à ce jour trouvé un ski de haute performance satisfaisant dans toutes les conditions d'utilisation.Despite the concern of the manufacturers to make skis of good quality, they have not, so far, found a satisfactory high performance ski in all conditions of use.

Les skis actuels présentent un certain nombre d'inconvénients et en particulier, celui du mauvais comportement lors des oscillations dues aux vibrations ou aux flexions du ski. En effet, les vibrations persistantes provoquent une perte d'adhérence et donc, une mauvaise conduite du ski. Il est donc très important d'amortir les vibrations, ainsi il a déjà été proposé des solutions. Notons par exemple les solutions proposées dans les demandes de brevet DE 29709403 , EP 521 272 , EP 733 386 . Mais ces dispositifs d'amortissement n'ont en fait que des effets tout à fait mineurs et imperceptibles pour le skieur.Current skis have a number of disadvantages and in particular, that of the bad behavior during oscillations due to vibrations or flexions of the ski. Indeed, the persistent vibrations cause a loss of grip and therefore, a bad driving of the ski. It is therefore very important to dampen the vibrations, so solutions have already been proposed. Note for example the solutions proposed in the patent applications DE 29709403 , EP 521 272 , EP 733,386 . But these damping devices have only effects quite minor and imperceptible to the skier.

Le document DE 29709403 décrit une planche de glisse avec des moyens d'amortissement constitués par un tunnel dans lequel un piston de friction est libre de coulisser. Le piston de friction peut être constitué par un parallélépipède ou par des tiges cylindriques. Dans les deux cas, le piston de friction présente une certaine épaisseur qui est supérieure au tiers de l'épaisseur totale du ski. Cette grande épaisseur des éléments de friction par rapport à l'épaisseur totale du ski induit une modification importante des caractéristiques du ski, et en particulier des caractéristiques de flexion et de torsion. D'autre part, la trop grande épaisseur des moyens d'amortissement par rapport à l'épaisseur totale du ski fait que ceux-ci se retrouve près de la fibre neutre du ski. Lorsque qu'une poutre est soumise à la flexion vers le haut, la partie supérieure de la poutre est soumise à des contraintes de compression, tandis que la partie inférieure de la poutre est soumise à des contraintes de traction. La fibre neutre de cette poutre correspond à une surface fictive regroupant tous les points de la poutre qui ne sont soumis ni à une traction, ni à une compression. Des moyens d'amortissement d'une planche de glisse seront d'autant plus efficaces qu'ils seront éloignés de la fibre neutre de celle-ci. Dans le cas du ski décrit dans DE 29709403 , cette caractéristique est loin d'être présente.The document DE 29709403 discloses a gliding board with damping means constituted by a tunnel in which a friction piston is free to slide. The friction piston may be constituted by a parallelepiped or by cylindrical rods. In both cases, the friction piston has a thickness that is greater than one third of the total thickness of the ski. This great thickness of the friction elements with respect to the total thickness of the ski induces a significant modification of ski characteristics, and in particular flexural and torsional characteristics. On the other hand, the excessive thickness of the damping means with respect to the total thickness of the ski makes them close to the neutral fiber of the ski. When a beam is subjected to bending upwards, the upper part of the beam is subjected to compression stresses, while the lower part of the beam is subjected to tensile stresses. The neutral fiber of this beam corresponds to a dummy surface grouping all the points of the beam which are not subject to traction or compression. Means for damping a gliding board will be more effective than they will be away from the neutral fiber thereof. In the case of the ski described in DE 29709403 this characteristic is far from present.

Le document EP 521 272 décrit un ski avec des moyens d'amortissement constitués par une lame de flexion reliée au ski par des moyens de friction. Un tel système présente de nombreux inconvénients, et notamment ceux induits par le fait qu'il s'agisse d'un dispositif extérieur au ski. La mise en place de ce dispositif se fait principalement après la fabrication principale du ski, c'est-à-dire après l'injection ou le moulage du ski. D'autre part, la mise en place sur la face extérieure du ski gêne considérablement la décoration de ce dernier et notamment limite les possibilités de design, de look extérieur du ski.The document EP 521 272 describes a ski with damping means constituted by a flexion blade connected to the ski by friction means. Such a system has many drawbacks, and in particular those induced by the fact that it is a device outside the ski. The installation of this device is mainly after the main manufacture of the ski, that is to say after the injection or molding of the ski. On the other hand, the establishment on the outer face of the ski greatly hampers the decoration of the latter and in particular limits the possibilities of design, exterior look of the ski.

Le document EP 733 386 décrit un ski avec des moyens d'amortissement constitués par plusieurs lamelles placées les unes sur les autres. Le dispositif d'amortissement est un dispositif indépendant du reste du ski, constitué par une boîte fermée dans laquelle sont empilées les lamelles et les couches de friction, laquelle boîte étant insérée entre le renfort supérieur et le dessus du ski, c'est-à-dire la couche de protection et de décoration. Il s'agit là encore d'un dispositif d'amortissement qui va considérablement modifier les caractéristiques mécaniques du ski car celui-ci est lourd et épais.The document EP 733,386 describes a ski with damping means consisting of several lamellae placed one on the other. The damping device is a device independent of the rest of the ski, consisting of a closed box in which are stacked the lamellae and the friction layers, which box is inserted between the upper reinforcement and the top of the ski, that is to say say the protective and decorative layer. This is again a damping device that will significantly alter the mechanical characteristics of the ski because it is heavy and thick.

Le document EP 966 992 décrit un ski dont les chants sont équipés d'éléments filtrants dont l'objectif est d'amortir uniquement les vibrations parasites qui se propagent entre les carres et le dessus du ski. Ces éléments filtrants sont réalisés en matériau souple et fonctionnent par compression.The document EP 966 992 describes a ski whose edges are equipped with filtering elements whose objective is to dampen only the parasitic vibrations that propagate between the edges and the top of the ski. These filter elements are made of flexible material and work by compression.

La présente invention veut remédier aux différents inconvénients évoqués précédemment et propose une solution particulièrement simple, efficace et fiable aux problèmes d'amortissement des vibrations.The present invention seeks to overcome the various disadvantages mentioned above and proposes a particularly simple, effective and reliable solution to vibration damping problems.

L'objectif de l'invention est également de fournir une planche de glisse équipée de moyens d'amortissement par friction, lesquels moyens d'amortissement étant simples et peu onéreux dans la mesure où ceux-ci peuvent être intégrés au ski directement lors de la phase d'injection de cette dernière.The object of the invention is also to provide a gliding board equipped with friction damping means, which damping means are simple and inexpensive to the extent that they can be integrated into the ski directly during the race. injection phase of the latter.

A cet effet, le dispositif d'amortissement selon l'invention, destiné à amortir les vibrations d'une planche de glisse de longueur L comportant un noyau principal placé entre un sous-ensemble inférieur et un sous-ensemble supérieur, ledit sous-ensemble supérieur, respectivement ledit sous-ensemble inférieur comportant au moins un premier renfort supérieur, respectivement un premier renfort inférieur, s'étendant longitudinalement sur au moins les deux tiers de la longueur de ladite planche de glisse, et comprenant en outre des moyens d'amortissement par friction; est caractérisé en ce que lesdits moyens d'amortissement comprennent une lame d'épaisseur inférieure à 2 mm et des moyens permettant le coulissement d'au moins une des extrémités de ladite lame ; en ce que lesdits moyens d'amortissement sont placés entre ledit premier renfort inférieur et ledit premier renfort supérieur, et en ce que la distance séparant lesdits moyens d'amortissement du premier renfort supérieur, ou dudit premier renfort inférieur est comprise entre 0 mm et 4 fois l'épaisseur de ladite lame, lesdits moyens d'amortissement étant éloignés le plus possible de la fibre neutre de la planche de glisse.For this purpose, the damping device according to the invention, intended to damp the vibrations of a gliding board of length L comprising a main core placed between a lower subassembly and an upper subassembly, said subassembly upper, respectively said lower subset comprising at least a first upper reinforcement, respectively a first lower reinforcement, extending longitudinally over at least two-thirds of the length of said gliding board, and further comprising friction damping means; is characterized in that said damping means comprise a blade less than 2 mm thick and means for sliding at least one end of said blade; in that said damping means are placed between said first lower reinforcement and said first upper reinforcement, and in that the distance separating said damping means from the first upper reinforcement, or said first lower reinforcement is between 0 mm and 4 mm. times the thickness of said blade, said damping means being as far away as possible from the neutral fiber of the gliding board.

Selon, une ou plusieurs autres caractéristiques de la planche de glisse prise seule ou en combinaison,

  • un espace d'expansion est prévu pour recevoir l'extrémité de la lame,
  • les moyens d'amortissement se trouvent au-dessus de la fibre neutre,
  • les moyens d'amortissement se trouvent en dessous de la fibre neutre,
  • les moyens permettant le coulissement sont constitués par un fourreau de longueur supérieur au quart de la longueur de la planche de glisse,
  • les moyens d'amortissement sont situés entre ledit noyau principal et ledit premier renfort intermédiaire,
  • la lame et son fourreau ont une épaisseur inférieure à 2,5 mm, de préférence inférieure à 1,8 mm,
  • la lame comprend une portion fixée par rapport au reste de la planche de glisse dans une zone centrale de la planche de glisse et au moins une extrémité libre, susceptible de coulisser par rapport au reste de la planche de glisse, la dite zone centrale correspondant à une zone de longueur environ égale à 600 mm centrée sur la ligne de milieu de chaussure (MC),
  • les moyens d'amortissement comprennent une lame ayant deux extrémités libres de coulisser et une portion centrale fixée à ladite planche de glisse,
  • les moyens d'amortissement comprennent au moins deux lames, chacune étant enveloppée dans un fourreau l'une desdites deux lames étant placée dans la partie avant de ladite planche de glisse, tandis que l'autre étant placée dans la partie arrière de ladite planche de glisse,
  • les moyens d'amortissement comprennent au moins deux lames, chacune étant enveloppée dans un fourreau, lesdites deux lames étant placées côte à côte dans la partie avant ou dans la partie arrière de la planche de glisse,
  • la largeur de ladite lame, respectivement la somme des largeurs desdites deux lames placées cote à cote est comprise entre 6 mm et 30 mm,
  • le sous-ensemble supérieur comporte au moins un deuxième renfort supérieur s'étendant longitudinalement sur au moins le tiers de la longueur de ladite planche de glisse et ayant un module supérieur à 25 000 mPa, lesdits moyens d'amortissement par friction étant placés entre ledit premier renfort supérieur et ledit deuxième renfort supérieur,
  • le renfort supérieur comprend également un noyau secondaire placé entre ledit premier renfort supérieur et ledit deuxième renfort supérieur, les dits moyens d'amortissement se trouvant dans une cavité ménagée dans ledit noyau secondaire,
  • les moyens d'amortissement comprennent un capuchon mis en place sur l'extrémité libre de la lame, ledit capuchon comprenant un matériau de dureté inférieure à 50 shore A,
  • l'extrémité libre de la lame est susceptible d'avoir une course comprise entre 1 et 3 mm.
According to one or more other characteristics of the gliding board taken alone or in combination,
  • an expansion space is provided to receive the end of the blade,
  • the damping means are above the neutral fiber,
  • the damping means are below the neutral fiber,
  • the means for sliding are constituted by a sheath longer than one quarter of the length of the gliding board,
  • the damping means are located between said main core and said first intermediate reinforcement,
  • the blade and its sheath have a thickness of less than 2.5 mm, preferably less than 1.8 mm,
  • the blade comprises a fixed portion relative to the rest of the gliding board in a central zone of the gliding board and at least one free end, slidable with respect to the rest of the gliding board, said central area corresponding to a zone of length approximately equal to 600 mm centered on the mid-shoe line (MC),
  • the damping means comprise a blade having two free sliding ends and a central portion fixed to said gliding board,
  • the damping means comprise at least two blades, each being wrapped in a sleeve one of said two blades being placed in the front part of said gliding board, while the other being placed in the rear part of said board of slides,
  • the damping means comprise at least two blades, each being wrapped in a sleeve, said two blades being placed side by side in the front part or in the rear part of the gliding board,
  • the width of said blade, respectively the sum of the widths of said two blades placed side by side is between 6 mm and 30 mm,
  • the upper subassembly comprises at least a second upper reinforcement extending longitudinally over at least one third of the length of said gliding board and having a modulus greater than 25,000 mPa, said friction damping means being placed between said first upper reinforcement and said second upper reinforcement,
  • the upper reinforcement also comprises a secondary core placed between said first upper reinforcement and said second upper reinforcement, said damping means being in a cavity formed in said secondary core,
  • the damping means comprise a cap placed on the free end of the blade, said cap comprising a material of hardness less than 50 Shore A,
  • the free end of the blade is likely to have a stroke of between 1 and 3 mm.

Les moyens d'amortissement selon l'invention sont particulièrement efficaces car ils agissent sur une portion importante de la longueur de la planche de glisse et car ils sont éloignés, le plus possible, de la fibre neutre de la planche de glisse, qu'ils soient placés au dessus ou au dessous d'elle. Pourtant, le poids rajouté par les moyens d'amortissement est minime par rapport à l'amortissement qu'ils réalisent et ils peuvent passer sensiblement inaperçus, ne modifiant que très peu les caractéristiques mécaniques de la planche de glisse. De plus étant donné qu'ils sont placés sous le premier renfort supérieur, ou sur le premier renfort inférieur, ils sont complètement intégrés dans la structure et ils n'ont aucun effet sut la forme extérieur du ski.The damping means according to the invention are particularly effective because they act on a large portion of the length of the gliding board and because they are distant, as much as possible, from the neutral fiber of the gliding board, which they be placed above or below it. However, the weight added by the damping means is minimal compared to the damping they achieve and they can pass substantially unnoticed, modifying only very little mechanical characteristics of the gliding board. Moreover, since they are placed under the first upper reinforcement, or on the first lower reinforcement, they are completely integrated into the structure and have no effect on the outer shape of the ski.

D'autres caractéristiques et avantages de l'invention se dégageront de la lecture de la description qui va suivre en regard des dessins annexés qui ne sont donnés qu'à titre d'exemple non limitatif.

  • La figure 1 est une vue de profil d'un ski selon un premier mode de réalisation de l'invention.
  • La figure 2 est une vue de dessus du ski de la figure 1.
  • La figure 3 est une coupe en perspective du ski selon le premier mode de réalisation.
  • La figure 4 est une vue de détail du premier mode de réalisation.
  • La figure 5 est une vue en coupe en perspective d'un deuxième mode de réalisation de l'invention.
  • La figure 6 est une coupe en perspective selon un troisième mode de réalisation de l'invention.
  • La figure 7 est une vue de dessus du ski selon le troisième mode de réalisation de l'invention.
  • La figure 8 est une vue en coupe en perspective selon un quatrième mode de réalisation de l'invention.
  • La figure 9 est une vue en coupe en perspective selon un cinquième mode de réalisation de l'invention.
  • La figure 10 est une vue de dessus d'une éprouvette servant à évaluer une force de glissement.
  • La figure 11 est une vue en coupe de l'éprouvette de la figure 10.
Other features and advantages of the invention will emerge from reading the description which follows with reference to the accompanying drawings which are given by way of non-limiting example.
  • The figure 1 is a side view of a ski according to a first embodiment of the invention.
  • The figure 2 is a top view of the ski from the figure 1 .
  • The figure 3 is a perspective section of the ski according to the first embodiment.
  • The figure 4 is a detail view of the first embodiment.
  • The figure 5 is a perspective sectional view of a second embodiment of the invention.
  • The figure 6 is a perspective section according to a third embodiment of the invention.
  • The figure 7 is a top view of the ski according to the third embodiment of the invention.
  • The figure 8 is a perspective sectional view according to a fourth embodiment of the invention.
  • The figure 9 is a perspective sectional view according to a fifth embodiment of the invention.
  • The figure 10 is a top view of a specimen for evaluating a sliding force.
  • The figure 11 is a sectional view of the specimen of the figure 10 .

La planche de glisse 1 montrée à la figure 1 est un ski 2 prévu pour la pratique du ski alpin. Le ski 2 est constitué par une poutre allongée ayant sa propre distribution d'épaisseur, de largeur et donc sa propre raideur. Il comprend une partie centrale sur laquelle sont fixées des fixations de sécurité 3, lesquelles étant constituées de manière connue par une butée avant et une talonnière arrière. De façon connue, le ski possède au centre de cette zone centrale une ligne le traversant dans une direction transversale ou un repère appelé "milieu de chaussure" (MC). Le "milieu de chaussure" est une aide fournie par le fabricant de ski facilitant pour l'utilisateur, ou le professionnel qui monte les fixations, le positionnement de celles-ci à l'endroit le plus adapté sur le ski. Le milieu de chaussure (MC) représente le point du ski qui en correspondance duquel se trouve le centre de la chaussure. Un repère correspondant est également mentionné sur les chaussures de ski alpin ou de ski de randonnée.The gliding board 1 shown at figure 1 is a ski 2 provided for the practice of alpine skiing. The ski 2 is constituted by an elongated beam having its own distribution of thickness, width and therefore its own stiffness. It comprises a central part on which are fixed safety fasteners 3, which are formed in a known manner by a forward stop and a rear heel piece. In known manner, the ski has in the center of this central zone a line passing through it in a transverse direction or a marker called "shoe center" (MC). The "middle of the shoe" is a help provided by the ski manufacturer facilitating for the user, or the professional who mounts the bindings, the positioning of these at the most suitable place on the ski. The middle of the shoe (MC) represents the point of the ski which in correspondence of which is the center of the shoe. A corresponding landmark is also mentioned on alpine ski boots or ski touring boots.

La pointe avant du ski 2 est relevée pour former la spatule 25. La pointe arrière du ski 2 peut également être relevée pour former le talon 26. Entre la zone centrale 24 et la spatule est défini ce qu'on appelle généralement l'avant du ski 27, tandis qu'entre la zone centrale 24 et le talon 26 est défini ce qu'on appelle l'arrière du ski 28. Lorsque le ski est posé sur une surface plane, les deux points d'appui de celui-ci contre cette surface plane sont appelés le point de contact avant (Pca) et le point de contact talon (Pct).The front tip of the ski 2 is raised to form the spatula 25. The rear tip of the ski 2 can also be raised to form the heel 26. Between the central zone 24 and the spatula is defined what is generally called the front of the 27, while between the central zone 24 and the heel 26 is defined what is called the back of the ski 28. When the ski is placed on a flat surface, the two points of support of it against this flat surface are called the forward contact point (Pca) and the heel contact point (Pct).

Le ski se caractérise donc par les dimensions suivantes : la longueur totale L mesurée entre la pointe arrière du ski jusqu'à la pointe avant, la longueur spatule Ls mesurée entre le point de contact avant (Pca) et la pointe avant du ski, la longueur talon Lt mesurée entre la pointe arrière du ski et le point de contact talon (Pct), la longueur de contact avant (Lca) mesurée entre le milieu de chaussure et le point de contact avant, et la longueur de contact talon (Lct) mesurée entre le point de contact talon et le milieu de chaussure (MC).The ski is therefore characterized by the following dimensions: the total length L measured between the rear tip of the ski to the front tip, the spatula length Ls measured between the point of contact before (Pca) and the front tip of the ski, the heel length Lt measured between the back tip of the ski and the heel contact point (Pct), the front contact length (Lca) measured between the middle of the boot and the point of contact with the front, and the heel contact length (Lct) measured between the heel contact point and the shoe center (MC).

Le ski 2 représenté aux figures 1 à 4 est un ski dit à construction "sandwich". Il est constitué de manière connue par une structure intercalaire 31 placée entre un sous-ensemble inférieur 5 et un sous-ensemble supérieur 9. La structure intercalaire 31 comprend un noyau principal 13 encadré par des chants latéraux 14. Dans l'exemple représenté ici, le noyau principal est réalisé en bois et les chants latéraux sont réalisés en matériau plastique de type ABS. Bien entendu d'autres matériaux sont également envisageables dans le cadre de l'invention. De même, d'autre type de construction sont également possible, ski à coque autoporteuse, ski à caisson, etc.....The ski 2 shown in Figures 1 to 4 is a ski called "sandwich" construction. It is constituted in known manner by an intermediate structure 31 placed between a lower subassembly 5 and an upper subassembly 9. The intermediate structure 31 comprises a main core 13 flanked by side edges 14. In the example shown here, the main core is made of wood and the side edges are made of ABS plastic material. Of course other materials are also conceivable within the scope of the invention. Similarly, other types of construction are also possible, self-supporting ski, box ski, etc. .....

Le sous-ensemble inférieur 5 comprend une semelle de glisse 7, un premier renfort inférieur 8, un deuxième renfort inférieur 23 et deux carres 6 placées de chaque côté de la semelle de glisse 7. Le sous-ensemble supérieur 9 est constitué par une couche de protection 10, également appelé le dessus du ski, un premier renfort supérieur 11 et un deuxième renfort supérieur 12. Entre le premier renfort supérieur 11 et le deuxième renfort supérieur 12 est placé un noyau secondaire 15.The lower subassembly 5 comprises a sliding sole 7, a first lower reinforcement 8, a second lower reinforcement 23 and two edges 6 placed on each side of the gliding sole 7. The upper sub-assembly 9 is constituted by a layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12. Between the first upper reinforcement 11 and the second upper reinforcement 12 is placed a secondary core 15.

Conformément à l'invention, des moyens d'amortissement 16 par frottement sont placés à l'intérieur de la structure de la planche de glisse, à proximité du premier renfort supérieur 11 et sous ce dernier. En d'autres termes, les moyens d'amortissement sont placés entre la fibre neutre et le premier renfort supérieur 11. Dans le premier mode de réalisation de l'invention, ces moyens sont placés entre le premier renfort supérieur 11 et le deuxième renfort supérieur 12. Ces moyens d'amortissement par friction comprennent une lame 17 enveloppée dans un fourreau 18 et placée au contact du premier renfort supérieur 11.According to the invention, friction damping means 16 are placed inside the structure of the gliding board, near the first upper reinforcement 11 and under the latter. In other words, the damping means are placed between the neutral fiber and the first upper reinforcement 11. In the first embodiment of the invention, these means are placed between the first upper reinforcement 11 and the second upper reinforcement. 12. These friction damping means comprise a blade 17 wrapped in a sleeve 18 and placed in contact with the first upper reinforcement 11.

Les moyens d'amortissement 16 sont intégralement noyés à l'intérieur de la structure du ski sur toute leur longueur Lma. L'intégration complète des moyens d'amortissement dans la structure les rend totalement étanches à l'infiltration d'un quelconque élément (eau, poussière, etc........) pouvant en endommager le fonctionnement. Les moyens d'amortissement pourront être entièrement cachés à la vue de l'utilisateur du ski, mais il sera possible de prévoir des moyens translucides au niveau du noyau 13 et / ou du sous-ensemble supérieur 9, et / ou du sous-ensemble inférieur 5 de façon à ménager des fenêtres de vision. Ces fenêtres de vision permettront à l'utilisateur de voir toute ou certaines portions des moyens d'amortissement.The damping means 16 are integrally embedded inside the structure of the ski over their entire length LMA. The complete integration of the damping means in the structure makes them completely impervious to the infiltration of any element (water, dust, etc ........) that can damage the operation. The damping means may be completely hidden at the sight of the user of the ski, but it will be possible to provide translucent means at the core 13 and / or the upper subassembly 9, and / or the subset lower 5 so as to provide vision windows. These viewing windows will allow the user to see all or some portions of damping means.

Un autre moyen pour rendre visible les moyens d'amortissement sera de les disposer de telle façon qu'une partie seulement de ceux-ci soit noyée à l'intérieur de la structure. Dans ce cas, il faudra néanmoins qu'une grande partie de la longueur Lma des moyens d'amortissement soit noyée dans la structure du ski et que des moyens d'étanchéité soient prévus pour empêcher les poussières et l'eau de pénétrer à l'intérieur de la structure du ski.Another way to make visible the damping means will be to arrange them so that only part of them is embedded inside the structure. In this case, however, it will be necessary that a large part of the length Lma damping means is embedded in the structure of the ski and that sealing means are provided to prevent dust and water from entering the structure. inside the ski structure.

La figure 2 représente le ski selon le premier mode de réalisation de l'invention en vue de dessus, coupée partiellement de façon à voir apparaître le positionnement des moyens d'amortissement, c'est-à-dire de la lame 17 et de son fourreau 18. Comme on peut le voir la lame 17 s'étend sur une grande majorité de la longueur du ski. En fait, la lame s'étend depuis la proximité du point de contact talon jusqu'à la proximité du point de contact avant (Pca). Le fourreau 18 comprend quant à lui deux portions appelées gaines avant 32, arrière 33. Les deux portions du fourreau 18 ne sont pas contigües et laissent au centre du ski une portion de la lame découverte, c'est-à-dire non enveloppée par le fourreau 18. Lors de la fabrication du ski, la zone de la lame qui n'est pas enveloppée par le fourreau 18 et qui se retrouve ainsi directement au contact du premier renfort supérieur 11 va se trouver complètement fixée à ce dernier et de ce fait solidaire du ski dans la zone centrale de celui-ci. En revanche les portions de la lame 17 qui sont enveloppées dans le fourreau 18 conserveront leur faculté de glissement à l'intérieur du fourreau. Et ce, même si le fourreau se retrouve quant à lui fixé solidairement au renfort, et au noyau secondaire 15.The figure 2 represents the ski according to the first embodiment of the invention in top view, partially cut so as to show the positioning of the damping means, that is to say of the blade 17 and its sheath 18. As can be seen the blade 17 extends over a large majority of the length of the ski. In fact, the blade extends from the proximity of the heel contact point to the proximity of the forward contact point (Pca). The sheath 18 comprises two portions called front sheaths 32, rear 33. The two portions of the sheath 18 are not contiguous and leave in the center of the ski a portion of the blade uncovered, that is to say not wrapped by the sheath 18. During manufacture of the ski, the zone of the blade which is not enveloped by the sheath 18 and which is thus directly in contact with the first upper reinforcement 11 will be completely attached to the latter and this in solidarity with the ski in the central area of it. On the other hand, the portions of the blade 17 which are wrapped in the sheath 18 will retain their sliding capacity inside the sheath. And this, even if the sheath found itself fixed integrally to the reinforcement, and the secondary core 15.

Conformément à l'invention la portion de la lame, qui est fixe par rapport au ski, c'est à dire la zone d'ancrage 19, doit se trouver dans une plage de longueur 600 mm centrée sur le milieu de chaussure (MC), de préférence dans une plage de 200 mm centrée sur le milieu de chaussure.According to the invention the portion of the blade, which is fixed relative to the ski, that is to say the anchoring zone 19, must be in a range of length 600 mm centered on the middle shoe (MC) preferably in a range of 200 mm centered on the middle of the shoe.

Une variante non représentée du premier mode de réalisation de l'invention consiste à remplacer la zone d'ancrage 19 par un ancrage mécanique réalisé par un rivet, une vis ou un point traversant la lame. Dans cette variante, la lame 17 est entièrement enveloppée dans un fourreau 18, lequel ne comporte pas d'interruption dans la portion centrale. Cependant, le fourreau et la lame sont percés au niveau de la zone d'ancrage et le perçage coopère avec des moyens d'ancrage mécanique rendant solidaire la lame avec le reste du ski dans la zone centrale du ski.An unrepresented variant of the first embodiment of the invention consists in replacing the anchoring zone 19 by a mechanical anchorage made by a rivet, a screw or a point crossing the blade. In this variant, the blade 17 is entirely wrapped in a sheath 18, which does not have any interruption in the central portion. However, the sheath and the blade are drilled at the anchoring zone and the drilling cooperates with mechanical anchoring means rendering the blade integral with the rest of the ski in the central area of the ski.

Conformément à l'invention, les moyens d'amortissement s'étendent sur une longueur important de la partie avant du ski, et/ou de la partie arrière de celui-ci. Dans le premier mode de réalisation, les moyens d'amortissement s'étendent à l'avant et à l'arrière. Si on considère la pointe arrière du ski comme origine des mesures de longueur, l'extrémité avant de la lame se trouve en deçà du point de contact avant (Pca) à l'avant du ski, dans une plage de longueur (Ba) égale à 20% de la longueur de contact avant (Lca). L'extrémité arrière de la lame se trouve au delà du point de contact talon (Pct) dans une plage de longueur (Bt) égale à 20% de la longueur de contact talon (Lct).According to the invention, the damping means extend over a large length of the front portion of the ski, and / or the rear portion thereof. In the first embodiment, the damping means extend to the front and to the rear. If we consider the ski's rear tip as the origin of the length measurements, the front end of the blade is below the point of contact before (Pca) at the front of the ski, in a range of length (Ba) equal at 20% of the front contact length (Lca). The rear end of the blade is beyond the heel contact point (Pct) within a range of length (Bt) equal to 20% of the heel contact length (Lct).

Dans ces conditions, la zone dans laquelle l'énergie générée par les vibrations du ski est amortie par frottements se concentre dans l'avant du ski 27, se rapprochant du point de contact avant (Pca) sans se prolonger jusque dans la spatule. En particulier, il s'agit là d'une des raisons qui font qu'avec une planche de glisse selon l'invention, on obtient un bon compromis entre un bon amortissement des vibrations et un comportement réactif, relativement nerveux; c'est-à-dire une planche de glisse qui bien que les vibrations soient amorties n'ait pas un comportement amorphe.Under these conditions, the area in which the energy generated by the vibrations of the ski is damped by friction is concentrated in the front of the ski 27, approaching the point of contact before (Pca) without extending into the spatula. In particular, this is one of the reasons that with a board of glide according to the invention, we obtain a good compromise between a good vibration damping and a relatively nervous reactive behavior; that is to say, a gliding board which although the vibrations are damped does not have an amorphous behavior.

Dans l'exemple représenté au premier mode de réalisation, la longueur du ski est d'environ égale à 1700 mm, le milieu de chaussure (MC) est placé à 727 mm de la pointe arrière du ski. La spatule a une longueur de 170 mm et le point de contact avant Pca est situé à une distance de 1530 mm de la pointe arrière du ski. Ainsi la longueur de contact avant (Lca) est égale à 803 mm (1700-727-170) et l'extrémité avant de la lame se trouve positionnée dans la zone définie par les cotes suivantes : 1409 mm et 1530 mm.In the example shown in the first embodiment, the length of the ski is approximately equal to 1700 mm, the boot medium (MC) is placed at 727 mm from the rear tip of the ski. The spatula has a length of 170 mm and the point of contact before Pca is located at a distance of 1530 mm from the rear tip of the ski. Thus the front contact length (Lca) is equal to 803 mm (1700-727-170) and the front end of the blade is positioned in the area defined by the following dimensions: 1409 mm and 1530 mm.

En ce qui concerne la partie arrière, la longueur du talon (Lt) est égale à 70 mm, ainsi la longueur de contact talon (Lct) vaut 757 mm. L'extrémité arrière de la lame se trouve dans la zone définie par les cotes suivantes : 70 mm à 168,5 mm.With regard to the rear part, the length of the heel (Lt) is equal to 70 mm, so the heel contact length (Lct) is 757 mm. The rear end of the blade is in the area defined by the following dimensions: 70 mm to 168.5 mm.

Au lieu d'avoir une unique lame parcourant toute la longueur du ski, on peut bien entendu avoir deux lames, une à l'avant, l'autre à l'arrière, chacune enveloppée dans un fourreau et ayant leur portion se trouvant dans la zone centrale du ski hors du fourreau de façon s'ancrer contre le premier renfort supérieur.Instead of having a single blade running the length of the ski, you can of course have two blades, one at the front, the other at the back, each wrapped in a sheath and having their portion in the central zone of the ski out of the sheath so as to anchor against the first upper reinforcement.

Dans le premier mode de réalisation de l'invention, les moyens d'amortissement comprennent une unique lame métallique faite d'un matériau de type acier ou aluminium dont l'épaisseur est comprise entre 0,4 mm et 0,7 mm. En pratique, on a choisi une lame faisant 0,5 mm et faisant environ 12 mm de largeur.In the first embodiment of the invention, the damping means comprise a single metal blade made of a steel or aluminum type material whose thickness is between 0.4 mm and 0.7 mm. In practice, a blade 0.5 mm and about 12 mm wide was chosen.

Le fourreau 18 est réalisé par une gaine constituée par une tresse en fibre polyesther enduite sur sa face extérieure de résine polyuréthane. On pourra également prendre une gaine faite d'un papier enduit de silicone. On pourra éventuellement réaliser les moyens avec une lame qui serait enduite sur la majeure partie de sa longueur d'un matériau empêchant le collage et l'adhésion avec la résine du renfort supérieur. Ce matériau aurait, comme le fourreau, la fonction d'empêcher la solidarisation de la lame avec le reste du ski sur toute les portions de celles-ci autres que la zone d'ancrage 19.The sheath 18 is made of a sheath made of a polyester fiber braid coated on its outer surface with polyurethane resin. You can also take a sheath made of a paper coated with silicone. The means may possibly be made with a blade which would be coated over most of its length with a material preventing the bonding and adhesion with the resin of the upper reinforcement. This material, like the sheath, would have the function of preventing the blade from joining with the rest of the ski on all the portions thereof other than the anchoring zone 19.

Le dimensionnement de la lame, longueur et largeur est précisément défini par les propriétés de friction désirées. Pour ce faire, on procède à un test évaluant la force de coulissement nécessaire d'une lame dans une gaine, la gaine et la lame étant, au préalable, placées dans une éprouvette.The sizing of the blade, length and width is precisely defined by the desired friction properties. To do this, a test is made evaluating the sliding force required for a blade in a sheath, the sheath and the blade being previously placed in a test tube.

Les figures 10 et 11 montrent une éprouvette 35 servant au test d'évaluation. Celle-ci est constituée par un empilage de tissus de verre pré-imprégné de résine. De chaque coté de la gaine, trois couches de tissus (300x45 mm) sont placées. Au dessus et au dessous, cet empilement est enveloppé par des couches plus grandes (300x100 mm). La gaine fait 360 mm de long, elle dépasse de chaque cotés de l'empilement et elle est réalisée dans la matière que l'on souhaite évaluer. La lame est plus longue que la gaine de façon à offrir une prise pour effectuer le test de traction.The Figures 10 and 11 show a specimen 35 for the evaluation test. This consists of a stack of glass fabrics pre-impregnated with resin. On each side of the sheath, three layers of tissue (300x45 mm) are placed. Above and below, this stack is enveloped by larger layers (300x100 mm). The sheath is 360 mm long, it protrudes on each side of the stack and is made of the material that is to be evaluated. The blade is longer than the sheath to provide a grip to perform the tensile test.

Une fois l'empilement réalisé, on le place dans une presse de stratification, on effectue le cycle de cuisson avec une température et un temps déterminées en fonction du pré-imprégné choisi, puis on laisse se stabiliser l'éprouvette pendant au moins 24 heures. Passé ce délai, on réalise 4 tractions sur la lame en allers et retours de façon à roder le système.Once the stack is made, it is placed in a laminating press, the firing cycle is carried out with a temperature and a time determined according to the prepreg chosen, then the specimen is allowed to stabilize for at least 24 hours. . After this time, we perform 4 pulls on the blade back and forth so as to break the system.

La phase de test, à proprement parler, se déroule sur une machine de traction, l'éprouvette y étant fixée. On fait coulisser la lame de manière à n'en laisser que 200 mm à l'intérieur de l'éprouvette. On effectue ensuite une traction sur la lame en mesurant la force nécessaire pour faire coulisser cette dernière de 30 mm. Le relevé de la valeur moyenne, donne une évaluation du frottement de la lame dans la gaine.The test phase, strictly speaking, takes place on a traction machine, the specimen being attached to it. The slide is slid so as to leave only 200 mm inside the test piece. The blade is then pulled by measuring the force required to slide the blade 30 mm. The reading of the average value gives an evaluation of the friction of the blade in the sheath.

Pour obtenir un amortissement satisfaisant dans les conditions normales d'utilisation d'une planche de glisse, tel qu'un ski alpin, on dimensionnera la lame, de telle façon que la valeur moyenne de la force nécessaire au coulissement soit comprise entre 20 N et 80 N, de préférence comprise entre 40 N et 60 N.To obtain satisfactory damping in the normal conditions of use of a gliding board, such as an alpine ski, the blade will be dimensioned, so that the average value of the force required for sliding is between 20 N and 80 N, preferably between 40 N and 60 N.

Le test de glissement permet de choisir les dimensions de la lame, ou des lames, de manière à obtenir un amortissement optimal de la planche de glisse dans les conditions d'utilisation. Pour une lame d'épaisseur comprise entre 0,4 mm et 1 mm, on choisi une lame de largeur comprise entre 6 mm et 30 mm. Dans le cas où l'on place plusieurs lames côte à côte, on diminue en conséquence l'épaisseur de la lame de telle façon que la somme de leur largeur soit comprise entre 6 mm et 30 mm.The slip test makes it possible to choose the dimensions of the blade, or blades, so as to obtain optimal damping of the gliding board under the conditions of use. For a blade having a thickness of between 0.4 mm and 1 mm, a blade having a width of between 6 mm and 30 mm is chosen. In the case where several blades are placed side by side, the thickness of the blade is consequently reduced so that the sum of their width is between 6 mm and 30 mm.

La lame 17 est fixée par sa portion centrale au premier renfort supérieur 11 lors de la stratification du ski. En effet, le premier renfort supérieur 11 est réalisé en tissu de fibres de verre pré-imprégnées de résine. Lors de la stratification, la face supérieure de la lame qui n'est pas enveloppée par le fourreau va se retrouver collée au premier renfort supérieur 11 grâce à la résine. Dans le cas où le renfort supérieur est un renfort métallique, par exemple en aluminium, on pourra prévoir un film de colle pour s'assurer de la solidarisation de la lame avec le renfort supérieur. Dans le cas où, comme nous le verrons plus loin, les moyens d'amortissement ne sont pas directement au contact du renfort supérieur, mais à seulement à proximité de celui-ci, on pourra prévoir des moyens d'ancrage de la lame avec le noyau.The blade 17 is fixed by its central portion to the first upper reinforcement 11 during the stratification of the ski. Indeed, the first upper reinforcement 11 is made of fiberglass fabric pre-impregnated with resin. During lamination, the upper face of the blade which is not enveloped by the sheath will be bonded to the first upper reinforcement 11 with the resin. In the case where the upper reinforcement is a metal reinforcement, for example in aluminum, we can provide a glue film to ensure the joining of the blade with the upper reinforcement. In the case where, as we shall see below, the damping means are not directly in contact with the upper reinforcement, but only in the vicinity of the latter, it is possible to provide means for anchoring the blade with the core.

Dans le premier mode de réalisation de l'invention, les moyens d'amortissement se trouvent au-dessus de la fibre neutre. Par conséquent, lors d'une flexion vers le haut des pointes avant et arrière du ski, les extrémités de la lame vont avoir tendance à se rapprocher des pointes du ski. Pour que cela puisse se faire, il a été prévu des espaces d'expansion pour recevoir les extrémités de la lame.In the first embodiment of the invention, the damping means are above the neutral fiber. Therefore, when bending upwards of the front and rear tips of the ski, the ends of the blade will tend to get closer to the ski tips. For this to happen, expansion spaces have been provided to accommodate the ends of the blade.

Ces espaces d'expansion sont montrés aux figures 2 et 4. On peut y voir que les extrémités avant et arrière de la lame sont enveloppées dans un capuchon 22 de matière souple. La matière du capuchon 22, de préférence un élastomère, présente une dureté inférieure à 60 Shore A. Ainsi, les extrémités avant et arrière de la lame pourront se frayer un chemin dans le capuchon 22, sans que ce dernier n'exerce trop de résistance. Pour un bon fonctionnement des moyens d'amortissement, il est important que l'enveloppement de la lame 17 par le fourreau 18 et le capuchon 22 soit continu, sans qu'aucune portion de la lame 17 ne se retrouve exposée au contact de la résine du renfort supérieur. En pratique, on dispose le capuchon de telle façon qu'il recouvre également l'extrémité du fourreau.These expansion spaces are shown to figures 2 and 4 . It can be seen that the front and rear ends of the blade are wrapped in a cap 22 of flexible material. The material of the cap 22, preferably an elastomer, has a hardness of less than 60 Shore A. Thus, the front and rear ends of the blade can work its way into the cap 22, without the latter exerting too much resistance . For proper operation of the damping means, it is important that the wrapping of the blade 17 by the sleeve 18 and the cap 22 is continuous, without any portion of the blade 17 is found exposed in contact with the resin upper reinforcement. In practice, the cap is arranged in such a way that it also covers the end of the sheath.

Chacun des capuchons 22 est constitué par un parallélépipède de section légèrement supérieure à la section du fourreau 18. Le capuchon est fendu pour faciliter la pénétration de la lame 17. Dans une variante de réalisation de l'invention, on réalise les capuchons dans une matière transparente, ou translucide, et on ménage une fenêtre dans le premier renfort supérieur de façon à rendre visibles les extrémités de la lame depuis l'extérieur du ski. Il est alors possible de démontrer visuellement le mouvement des extrémités de la lame lors d'une flexion. En utilisation normale, les extrémités de la lame ont une course comprise entre 1 mm et 3 mm. Pour rendre plus visible le mouvement des extrémités de la lame, celles-ci sont coupées selon une ligne oblique par rapport à l'axe longitudinal.Each of the caps 22 is constituted by a parallelepiped of slightly greater section than the section of the sleeve 18. The cap is split to facilitate the penetration of the blade 17. In an alternative embodiment of the invention, the caps are made of a material transparent, or translucent, and a window is made in the first upper reinforcement so as to make the ends of the blade visible from the outside of the ski. It is then possible to visually demonstrate the movement of the ends of the blade during bending. In normal use, the ends of the blade have a stroke of between 1 mm and 3 mm. To make more visible the movement of the ends of the blade, they are cut along a line oblique to the longitudinal axis.

Les moyens d'amortissement constituent un ajout de poids inférieur à 100 g pour un ski de longueur 1700 mm, ce qui représente un poids très limité compte tenu de leur efficacité, notamment due au fait qu'ils agissent sur une majeure proportion de la longueur du ski.The damping means is an addition of weight less than 100 g for a ski length 1700 mm, which represents a very limited weight given their effectiveness, in particular due to the fact that they act on a greater proportion of the length ski.

La figure 5 montre une vue perspective en coupe du ski selon un deuxième mode de réalisation de l'invention. Il s'agit comme dans le mode précédent d'un ski dit à construction "sandwich". Il est constitué de manière connue par une structure intercalaire 31 placée entre un sous-ensemble inférieur 5 et un sous-ensemble supérieur 9. La structure intercalaire 31 comprend un noyau principal 13 encadré par des chants latéraux 14. Le sous-ensemble supérieur 9 est constitué par une couche de protection 10, également appelé le dessus du ski, un premier renfort supérieur 11 et un deuxième renfort supérieur 12.The figure 5 shows a perspective view in section of the ski according to a second embodiment of the invention. It is like in the previous mode of a so-called sandwich construction ski. It is constituted in known manner by an intermediate structure 31 placed between a lower subassembly 5 and an upper subassembly 9. The intermediate structure 31 comprises a main core 13 flanked by side edges 14. The upper subassembly 9 is constituted by a protective layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12.

Comme dans le mode de réalisation précédent, les moyens d'amortissement sont placés entre le premier renfort supérieur 11 et le second renfort supérieur 12. En revanche à la différence du mode précédent, les deux renforts supérieurs sont placés l'un sur l'autre, ne laissant entre eux qu'un espace suffisant pour la mise en place des moyens d'amortissement 16. Ceux-ci sont constitués d'une lame 17 solidaire des renforts supérieurs dans la zone centrale du ski et apte à coulisser dans un fourreau 18.As in the previous embodiment, the damping means are placed between the first upper reinforcement 11 and the second upper reinforcement 12. On the other hand, unlike the previous mode, the two upper reinforcements are placed one on the other , leaving between them only sufficient space for the establishment of damping means 16. These consist of a blade 17 secured to the upper reinforcements in the central area of the ski and slidable in a sleeve 18 .

Le fourreau 18 est réalisé grâce à l'enveloppement de la lame dans un papier siliconé. Il s'agit d'une feuille de papier enduite de silicone à 80 g/m2. Le fourreau enveloppe la lame sur une majeure partie de sa longueur, ne laissant découverte que la portion centrale de celle-ci. La portion centrale de la lame est solidarisée entre le deuxième renfort supérieur 12, lequel est une plaque d'aluminium, et le premier renfort supérieur 11, lequel est constitué par une nappe de tissus de fibre imprégné de résine.The sleeve 18 is made by wrapping the blade in a silicone paper. It is a sheet of paper coated with silicone at 80 g / m 2 . The sheath wraps the blade over most of its length, leaving only the central portion of the sheath exposed. The central portion of the blade is secured between the second upper reinforcement 12, which is an aluminum plate, and the first upper reinforcement 11, which is constituted by a sheet of fiber fabrics impregnated with resin.

Les figures 6 et 7 montrent un troisième mode de réalisation de l'invention dans lequel les moyens d'amortissement sont constitués par deux lames disposées sensiblement parallèlement. De préférence, chacune des lames est disposée sensiblement parallèlement à la ligne de cote qui lui est adjacente. Le ski 2 comprend un sous-ensemble inférieur 5, un noyau 13 et un sous-ensemble supérieur 9. Le sous-ensemble supérieur 9 est constitué par une couche de protection 10, également appelé le dessus du ski, un premier renfort supérieur 11 et un deuxième renfort supérieur 12. Entre le premier renfort supérieur 11 et le deuxième renfort supérieur 12 est placé un noyau secondaire 15. Des logements longitudinaux sont ménagés dans le noyau secondaire 15 pour recevoir les moyens d'amortissement.The figures 6 and 7 show a third embodiment of the invention wherein the damping means are constituted by two blades arranged substantially parallel. Preferably, each of the blades is disposed substantially parallel to the side line adjacent thereto. The ski 2 comprises a lower sub-assembly 5, a core 13 and an upper sub-assembly 9. The upper sub-assembly 9 is constituted by a protective layer 10, also called the top of the ski, a first upper reinforcement 11 and a second upper reinforcement 12. Between the first upper reinforcement 11 and the second upper reinforcement 12 is placed a secondary core 15. Longitudinal housings are formed in the secondary core 15 to receive the damping means.

On pourra choisir des lames droite et gauche rigoureusement identiques ou bien ayant des caractéristiques différentes. Cette dernière possibilité rendra possible la fabrication de paires de ski non symétrique, c'est-à-dire ayant un ski gauche différent du ski droit.We can choose blades right and left strictly identical or having different characteristics. This latter possibility will make it possible to manufacture pairs of non-symmetrical ski, that is to say having a left ski different from the right ski.

La figure 8 montre un quatrième mode de réalisation de l'invention dans lequel, les moyens d'amortissement sont placés dans le noyau principal à proximité du premier renfort supérieur 11. Dans ce mode de réalisation, les moyens d'amortissement 16 comprennent une lame 17 entièrement enveloppée dans un fourreau 18 dans toute sa longueur. La lame et son fourreau sont percés dans leur portion centrale. Lors de la fabrication du ski, les composants du ski, y compris les moyens d'amortissement mais en excluant le noyau, sont placés dans le moule, puis la matière du noyau principal 13 (par exemple PU) est injectée. Un système d'entretoise (non représentée) assure avant l'injection du noyau le juste positionnement des moyens d'amortissement par rapport au premier renfort supérieur 11. Le positionnement adéquat des moyens d'amortissement est celui dans lequel la distance qui les séparent du premier renfort inférieur est inférieure à 4 fois l'épaisseur de la dite lame. Dans l'exemple représenté, la lame a une épaisseur de 0,5 mm, si bien qu'on place les moyens d'amortissement de telle façon que la distance séparant la surface supérieure du fourreau de la face inférieure du renfort inférieur soit inférieure à 2 mm.The figure 8 shows a fourth embodiment of the invention in which the damping means are placed in the main core near the first upper reinforcement 11. In this embodiment, the damping means 16 comprise a blade 17 completely wrapped in a sheath 18 in all its length. The blade and its sheath are pierced in their central portion. During the manufacture of the ski, the components of the ski, including the damping means but excluding the core, are placed in the mold, then the material of the main core 13 (for example PU) is injected. A spacer system (not shown) ensures, before the injection of the core, the correct positioning of the damping means with respect to the first upper reinforcement 11. The proper positioning of the damping means is that in which the distance separating them from the first lower reinforcement is less than 4 times the thickness of said blade. In the example shown, the blade has a thickness of 0.5 mm, so that the damping means are placed in such a way that the distance separating the upper surface of the sheath from the lower face of the lower reinforcement is less than 2 mm.

Les moyens d'amortissement seront ancrés au ski lors du durcissement du noyau grâce à la matière du noyau qui les emprisonne. Notamment, la lame sera ancrée, au niveau de sa portion centrale au noyau grâce à la matière qui a pénétré dans le perçage qui y est ménagé.The damping means will be anchored to the ski during hardening of the core thanks to the material of the core which traps them. In particular, the blade will be anchored at its central portion to the core through the material that has penetrated into the borehole therein.

La figure 9 montre un cinquième mode de réalisation de l'invention. La planche de glisse est un ski dit à structure sandwich. Il est constitué d'un sous-ensemble inferieur 5, comportant un premier renfort inférieur 8, un deuxième renfort inférieur 23, une semelle de glisse 7 et d'une paire de carres 6 ; d'un sous-ensemble supérieur 9 comportant un dessus 10 et un premier renfort supérieur 11 ; ainsi que d'un unique noyau principal 13.The figure 9 shows a fifth embodiment of the invention. The gliding board is a ski called sandwich structure. It consists of a lower subassembly 5, comprising a first lower reinforcement 8, a second lower reinforcement 23, a sliding sole 7 and a pair of edges 6; an upper subassembly 9 having a top 10 and a first upper reinforcement 11; as well as a single main core 13.

Le noyau 13 est réalisé en bois. Dans la partie inférieure de ce dernier, on réalise une tranchée pouvant recevoir les moyens d'amortissement 16. Les moyens d'amortissement 16 sont placés au contact du premier renfort inférieur 8. Ils comprennent comme dans le premier mode de réalisation, une lame 17 s'étendant sur une majeure partie de la longueur du ski et un fourreau 18 comportant une gaine avant et une gaine arrière. Les deux gaines sont disjointes de façon à laisser au centre une portion de lame découverte qui est fixée à la structure du ski par collage lors de la polymérisation de la résine du premier renfort inférieur 8.The core 13 is made of wood. In the lower part of the latter, a trench is made that can receive the damping means 16. The damping means 16 are placed in contact with the first lower reinforcement 8. They comprise, as in the first embodiment, a blade 17 extending over a major part of the length of the ski and a sleeve 18 having a front sheath and a rear sheath. The two sheaths are disjointed so as to leave in the center an uncovered blade portion which is fixed to the structure of the ski by gluing during the polymerization of the resin of the first lower reinforcement 8.

Dans le cinquième mode de réalisation, les moyens d'amortissement se trouvent, au dessus du premier renfort inférieur et en dessous de la fibre neutre, et notamment au plus loin de cette dernière, afin d'en garantir une efficacité maximale.In the fifth embodiment, the damping means are located above the first lower reinforcement and below the neutral fiber, and in particular further away from the latter, to ensure maximum efficiency.

L'invention ne se limite pas aux quelques modes de réalisation décrits ici à titre d'exemple, et elle englobe toute réalisation équivalente, telle que les revendications revendiquées.The invention is not limited to the few embodiments described herein by way of example, and encompasses any equivalent embodiment, such as the claims claimed.

Claims (16)

  1. Gliding board (1) of length L comprising a main core (13) placed between a lower subassembly (5) and an upper subassembly (9), the said upper subassembly (9) and the said lower subassembly, respectively, comprising at least a first upper reinforcement (11) and a first lower reinforcement (8), respectively, extending longitudinally over at least two-thirds of the length of the said gliding board (1) and additionally comprising friction damping means (16); characterized in that the damping means (16) extend longitudinally over a length (Lma); in that the damping means are integrally embedded into the structure of the ski over a large part of this length (Lma); in that the said damping means (16) comprise a blade (17) having a thickness of less than 2 mm and means allowing the sliding movement of at least one of the ends of the said blade (17); in that the said damping means (16) are placed between the said first lower reinforcement (8) and the said first upper reinforcement (11), and in that the distance separating the said damping means (16) from the first upper reinforcement (11), or from the said first lower reinforcement (8), is between 0 mm and 4 times the thickness of the said blade (17), the said damping means being as far away as possible from the neutral fibre of the gliding board.
  2. Gliding board (1) according to Claim 1, characterized in that an expansion space is provided to receive the said end of the blade (17).
  3. Gliding board (1) according to either of Claims 1 and 2, characterized in that the damping means (16) are situated above the neutral fibre.
  4. Gliding board (1) according to either of Claims 1 and 2, characterized in that the damping means (16) are situated below the neutral fibre.
  5. Gliding board (1) according to one of the preceding claims, characterized in that the said means allowing the sliding movement are formed by a sleeve (18) having a length greater than a quarter of the length of the gliding board (1).
  6. Gliding board (1) according to one of the preceding claims, characterized in that the said damping means (16) are situated between the said main core (13) and the said first upper reinforcement.
  7. Gliding board (1) according to one of the preceding claims, characterized in that the said blade (17) and its sleeve (18) have a thickness of less than 2.5 mm, preferably of less than 1.8 mm.
  8. Gliding board (1) according to one of the preceding claims, characterized in that the said blade (17) comprises a portion fixed with respect to the remainder of the gliding board in a central zone (24) of the gliding board (1) and at least one free end capable of sliding with respect to the remainder of the gliding board, the said central zone (24) corresponding to a zone having a length approximately equal to 600 mm centred on the boot centre line (MC).
  9. Gliding board (1) according to one of the preceding claims, characterized in that the said damping means (16) comprise a blade (17) having two ends which are free to slide and a central portion fixed to the said gliding board (1).
  10. Gliding board (1) according to one of the preceding claims, characterized in that the said damping means (16) comprise at least two blades (17), each being enveloped in a sleeve (18), one of the said two blades (17) being placed in the front part of the said gliding board, while the other is placed in the rear part of the gliding board.
  11. Gliding board (1) according to one of the preceding claims, characterized in that the said damping means (16) comprise at least two blades (17), each being enveloped in a sleeve (18), the said two blades (17) being placed side by side in the front part or in the rear part of the gliding board (1).
  12. Gliding board (1) according to one of Claims 8 to 11, characterized in that the width of the said blade (17) or the sum of the widths of the said two blades placed side by side is between 6 mm and 30 mm.
  13. Gliding board (1) according to one of the preceding claims, characterized in that the said upper subassembly (9) comprises at least a second upper reinforcement (12) extending longitudinally over at least a third of the length of the said gliding board (1), the said friction damping means (16) being placed between the said first upper reinforcement (11) and the said second upper reinforcement (12).
  14. Gliding board (1) according to Claim 13, characterized in that the said upper reinforcement also comprises a secondary core (15) placed between the said first upper reinforcement (11) and the said second upper reinforcement (12), the said damping means (16) being situated in a cavity formed in the said secondary core (15).
  15. Gliding board (1) according to one of the preceding claims, characterized in that the said damping means (16) comprise a cap (22) placed on the free end of the blade (17), the said cap (22) comprising a material having a hardness of less than 50 Shore A.
  16. Gliding board (1) according to one of the preceding claims, characterized in that the free end of the blade (17) is able to have a travel of between 1 and 3 mm.
EP10006280.1A 2009-06-26 2010-06-17 Snowboard Active EP2266672B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0903107A FR2947182B1 (en) 2009-06-26 2009-06-26 BOARD OF SLIDERS

Publications (2)

Publication Number Publication Date
EP2266672A1 EP2266672A1 (en) 2010-12-29
EP2266672B1 true EP2266672B1 (en) 2014-07-23

Family

ID=41597910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10006280.1A Active EP2266672B1 (en) 2009-06-26 2010-06-17 Snowboard

Country Status (3)

Country Link
US (1) US8240697B2 (en)
EP (1) EP2266672B1 (en)
FR (1) FR2947182B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926735B1 (en) * 2008-01-25 2010-03-26 Salomon Sa ALPINE SKI WITH MEANS OF ADJUSTMENT
JP6054951B2 (en) 2011-05-20 2016-12-27 エコラボ ユーエスエー インコーポレイティド Non-corrosive oven degreasing concentrate
US9950242B2 (en) 2015-06-19 2018-04-24 Anton F. Wilson Automatically adaptive ski
ITUA20162056A1 (en) * 2016-03-07 2017-09-07 Gianluca Reggioni SKI AND CUSHIONED PLATES

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT374686B (en) * 1982-05-26 1984-05-25 Blizzard Gmbh MULTI-LAYER SKI IN SANDWICH DESIGN
US4556237A (en) * 1984-02-22 1985-12-03 Olin Corporation Alpine ski with selective reinforcement
US4706985A (en) * 1984-02-22 1987-11-17 Tristar Sports Inc. Alpine ski with selective reinforcement
FR2620628B2 (en) * 1987-02-27 1994-08-19 Salomon Sa PROCESS FOR REALIZING A SKI AND SKIING DOES ACCORDING TO THIS PROCESS
FR2654644B1 (en) * 1989-11-22 1992-03-13 Salomon Sa PROCESS FOR MANUFACTURING AN INJECTED SKI, AND SKI STRUCTURE OBTAINED BY THIS PROCESS.
FR2675392B1 (en) * 1991-04-22 1995-06-23 Salomon Sa DAMPING DEVICE FOR SKIING.
FR2678517B1 (en) * 1991-07-04 1993-10-15 Salomon Sa IMPROVEMENT FOR SKI DAMPING DEVICE.
FR2683734B1 (en) * 1991-11-19 1994-01-07 Rossignol Sa SKI IN SHAPE, NON-RECTANGULAR SECTION.
FR2694201B1 (en) * 1992-07-31 1994-09-23 Salomon Sa Method of manufacturing a ski.
FR2701215B1 (en) * 1993-02-05 1995-04-14 Salomon Sa Improvement for damping device for ski and ski equipped with such a device.
EP0733386A3 (en) 1995-03-23 1998-10-21 Franz Völkl GmbH & Co. Ski und Tennis Sportartikelfabrik KG Ski, snowboard, snow sliding apparatus or the like with damper
AT405139B (en) * 1995-08-14 1999-05-25 Atomic Austria Gmbh SLIDER
IT1289203B1 (en) * 1996-02-01 1998-09-29 Mario Magnani STRUCTURE ADJUSTMENT SYSTEM WITH SHOCK ABSORBER FOR SNOW SKIING.
DE29709403U1 (en) * 1997-05-28 1998-02-26 SSG (Europe) SA, Givisiez Ski or snowboard
FR2780294B1 (en) * 1998-06-25 2000-08-11 Rossignol Sa SNOW SNOWBOARD
FR2799659B1 (en) * 1999-10-14 2002-01-11 Rossignol Sa SLIDING BOARD
AT411869B (en) * 1999-12-22 2004-07-26 Atomic Austria Gmbh BOARD-LIKE SLIDER, ESPECIALLY SKI OR SNOWBOARD
FR2916649B1 (en) * 2007-06-01 2010-02-19 Salomon Sa SLIDING BOARD WITH SIDE SIDES
FR2916983B1 (en) * 2007-06-06 2010-08-13 Salomon Sa SLIDING OR ROLLING BOARD
FR2925344A1 (en) * 2007-12-20 2009-06-26 Dynastar Skis Sa SNOWBOARD BOARD AND GAME OF AT LEAST TWO SUCH SNOWBOARD BOARDS
FR2934166B1 (en) * 2008-07-23 2010-08-13 Salomon Sas SLIDING OR ROLLING BOARD
FR2939323B1 (en) * 2008-12-08 2011-03-25 Salomon Sas ALPINE SKI WITH CONTROLLED FLEXION

Also Published As

Publication number Publication date
FR2947182A1 (en) 2010-12-31
FR2947182B1 (en) 2011-09-09
US20100327560A1 (en) 2010-12-30
US8240697B2 (en) 2012-08-14
EP2266672A1 (en) 2010-12-29

Similar Documents

Publication Publication Date Title
EP0622096B1 (en) Snowboard
EP0521272B1 (en) Improvements in damping devices for skis
EP0490043B1 (en) Ski containing base, upper body and attaching member for bindings
FR2675392A1 (en) DAMPING DEVICE FOR SKIING.
EP2000180B1 (en) Snowboard or skateboard with reinforcement made of natural fibers
EP0609543B1 (en) Ski with a damping device
EP1902758B1 (en) Schneegleitbrett mit einem länglichen Spalt an mindestens einem Ende
EP0490044A1 (en) Winter-sport ski comprising stiffener and base
EP2266672B1 (en) Snowboard
CH689542A5 (en) Soul snowboard.
FR2694205A1 (en) Improvement for damping device for ski.
WO1997020604A1 (en) Shock absorbing device for a ski or the like
EP0498053A1 (en) Ski for winter sport comprising a mounting platform for ski bindings
EP2272572A2 (en) Snow sports board
EP0062723B1 (en) Ski of the type having a vibration-damping system
EP0976427A1 (en) Sliding board for alpine skiing or snow surfing
EP0692284A1 (en) Ski damping device and ski provided with such a device
EP0677306B1 (en) Ski and method for producing the same
FR2670392A1 (en) Winter sports ski consisting of a base and a stiffener
FR2726193A1 (en) Ski or similar with interchangeable plates to hold bindings
EP2213339B1 (en) Ski including a vibration damping system
EP0661086A1 (en) Ski
FR2675391A1 (en) Winter sports' ski comprising a stiffener and a base
FR2802438A1 (en) Ski or snowboard has strip of viscoelastic material fitted between its two upper layers on either side of center line of ski
EP4091683A1 (en) Core for a glide board and associated glide board

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME RS

17P Request for examination filed

Effective date: 20110628

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140123

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 678534

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140815

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602010017634

Country of ref document: DE

Effective date: 20140904

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 678534

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140723

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140723

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141023

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141024

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141124

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141023

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141123

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602010017634

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20150424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150617

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150617

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150617

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150630

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150630

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150617

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100617

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140723

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240502

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240509

Year of fee payment: 15