EP0682961B1 - Alpine ski provided with a stiffening and/or damping device double-action - Google Patents

Alpine ski provided with a stiffening and/or damping device double-action Download PDF

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Publication number
EP0682961B1
EP0682961B1 EP95104526A EP95104526A EP0682961B1 EP 0682961 B1 EP0682961 B1 EP 0682961B1 EP 95104526 A EP95104526 A EP 95104526A EP 95104526 A EP95104526 A EP 95104526A EP 0682961 B1 EP0682961 B1 EP 0682961B1
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EP
European Patent Office
Prior art keywords
ski
free end
displacement
resistance
section
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EP95104526A
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German (de)
French (fr)
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EP0682961A1 (en
Inventor
Jacques Le Masson
Philippe Commier
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Salomon SAS
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Salomon SAS
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness

Definitions

  • the invention relates to an improved ski provided with a device intended to modify stiffness and / or damping, depending on the deformation of the ski.
  • skiing is a beam having its inherent stiffness (R) which increases substantially linearly depending on the bending.
  • R inherent stiffness
  • f1 the free end cooperates with a stop system which opposes the displacement of the rod whose rigidity adds to that of skiing.
  • f1 a bending value limit
  • the ski comprises two stiffening elements attached to the basic body and which cooperate with each other from a given bending value of so as to increase the overall stiffness of the ski.
  • the devices are shock absorbers which also operate on the principle that when the deformed ski increases, the response in terms of damping increases proportionally.
  • document FR-A-2 654 635 relates to a device for mounting a boot on a ski comprising a front stop, a heel piece and a rigid connection orgy extended longitudinally between the front stop and the heel piece.
  • the device includes also means for producing, in the absence of a shoe, a tension preload longitudinal say the connecting member. This device makes it possible to modify the camber at will of the ski skid area and therefore relieve the ends of the ski from the pressure exerted by the weight of the skier.
  • the shoe has no direct effect on the device aiming to modify the pressure distribution on snow.
  • the object of the present invention is therefore to propose a ski provided with a device for stiffening and / or damping whose effect acts inversely proportional to the flexion exerted on the ski so as to obtain a machine which has stability properties and / or flat damping and pivoting and nervousness properties during engagement tight curves.
  • the ski according to the invention is characterized in that the resistance force of said means of resistance which opposes the movement of said free end decreases between a force of strong resistance obtained for a position of minimal displacement of the free end when the ski is slightly deformed in flexion, and a low resistance force obtained for a position of maximum displacement of the free end when the ski is strongly deformed in bending.
  • the decrease in resistance force is expected between the minimum displacement position and the maximum displacement position is progressive.
  • the elongated element is rigidly connected to the ski by its end opposite the free end so that the distance between the connecting means rigid as far as possible from the resistance means and increases the amplitude of displacement of the free end.
  • the free end of the elongated element includes an increase in cross-section and cooperates with friction means belonging to the resistance means below said displacement value predetermined; said increase in section being, at least in part, cleared of said friction means from and beyond said displacement value so as to allow free sliding of the elongated element.
  • the friction means consist of at least two friction pads made of a material with a high coefficient of friction; said means of resistance also comprising a pressure member which compresses the pads of friction against the surfaces of the free end.
  • the free end of the elongated element comprises a increased section which cooperates with the first friction means of the resistance means, below said predetermined displacement value; then with second friction means, from and beyond said value of displacement ; the material chosen to constitute the second means of friction with a lower coefficient of friction than the chosen material to constitute the first means.
  • the resistance means is a shock absorber liquid or gaseous fluid comprising a sealed chamber having a cavity internal, a piston connected to said free end and passing through said chamber.
  • said piston moves in at least two parts of different cross sections; the first part of the section below said predetermined displacement value and a second part of upper section than the section of the first part from and beyond of said.
  • the device comprises at less a means for longitudinal guiding in translation of the elongated element between the free end and the rigid connection means, to improve its resistance to buckling.
  • the ski of the invention illustrated in FIG. 4 comprising the device consists of an elongated beam (1) having its own distribution of thickness, width and therefore its own stiffness. It includes a central part (10) also called mounting of the bindings (11, 12) intended to retain the boot on the ski.
  • the end front (13) of the beam (1) is raised to form the spatula; while the end rear (14) is also to form the heel.
  • the beam also includes a lower sliding surface (15) and an upper surface (16). Note that the contact of the lower surface (15) with the snow takes place between the front point contact (150) and the rear contact point (151) corresponding to each other where said lower surface begins to rise.
  • FIG. 4 illustrates a first embodiment of the invention which comprises an attached stiffening or damping device (2) disposed at the front of the beam (1), on its upper surface (16).
  • This device includes an element elongated consisting of a flexible blade (3) having a first fixed end (30) secured to the upper surface (16) by a rigid connection means (4); and an second free end (31) which cooperates with a resistance means (5) which opposes the relative movement of said free end (31) relative to the upper surface (16) of the ski when the ski is stressed in bending.
  • the resistance means (5) comprises friction means constituted by two friction pads respectively upper (50) and lower (51) of material with a high coefficient of friction.
  • the resistance means (5) also comprises a support and retaining stirrup (52).
  • the friction surfaces of each shoe (50, 51) are separated from each other a certain distance (e) corresponding substantially to the thickness of the end free (31) of section (S1) over a first length (L1) and over a width (l1).
  • the upper surface (310) and the lower surface (311) of said end free are in contact with the surface of the friction pads respectively upper (50) and lower (51) below a certain displacement value (d1) of the blade.
  • the friction material may consist, for example, of a layer of thermoplastic rubber or viscoelastic material. So, a first layer is glued to the upper surface (16) of the ski and a second layer is glued under the central wall of the retaining clip which has the shape of an ⁇ (omega) and which is fixed by screws (520).
  • the front end (31) of the blade can thus be move along F1 and F2 between the friction pads (50, 51). For there to be energy dissipation of the longitudinal movements according to F1 and F2, the stirrup maintains pressure and pinches the blade between the two layers.
  • the intensity or the clamping force of the bending blade between the two layers of friction by the stirrup can be adjustable according to the amortization that we want to obtain.
  • the longitudinal position of the resistance means (5) can be adjusted easily by the removable connection provided between the stirrup (52) and the upper surface skiing (16).
  • Figures 5, 5a and 5b show the ski provided with the device in a second operating figuration; that is to say when a maximum displacement threshold of the free end is reached in the direction F1 depending on the stress exerted on the beam (1).
  • the free section end (S1) is released from the friction pads (50, 51) and is engaged in a section cavity (53) in which the surfaces (310, 311) of the free end are no longer subject to friction.
  • the blade further comprises a narrowing (32) of section (S2) which can slide freely between the pads (50, 51) without friction (e2 being less than e, in particular). In this configuration, the means of resistance no longer opposes a resistance force against the free end of the blade ; which makes skiing easier to drive.
  • Figure 6 illustrates the shape of the curve showing the variation of the overall stiffness (R) of the ski as a function of the displacement (d) of the free end, itself proportional to the deformation of the ski.
  • the blade includes an area of transition (320) between the free end (31) of strong section (S1) and the narrowing (3) adjacent of smaller section (S2); in which the reduction in cross section done gradually to facilitate the return in place of the blade when the ski returns to its original shape.
  • FIG. 7 illustrates a variant of the previous mode.
  • the blade also includes a free end (31) with increased section followed by a narrowing (32). Said free end (31) cooperates with a resistance means (5) which comprises, first of all a series of pads (50a, 51a) chosen from a material with a determined coefficient of friction and then a second series of skids (50b, 51b), adjacent to the first series, and chosen from a material having a coefficient of friction lower than the material of the first series.
  • a resistance means (5) which comprises, first of all a series of pads (50a, 51a) chosen from a material with a determined coefficient of friction and then a second series of skids (50b, 51b), adjacent to the first series, and chosen from a material having a coefficient of friction lower than the material of the first series.
  • FIGS. 8 to 10 illustrate another embodiment of the invention in which the friction type resistance means is replaced by a shock absorber with liquid or gaseous fluid.
  • the shock absorber comprises, at least two separate operating modes in the case of FIGS. 8 and 9 and only one progressive evolution regime in the case of Figure 10.
  • the damping device (2) comprises a blade (3) also having a fixed end (30) and a free end (31). Said free end engages in a sealed chamber (20) and ends with a piston (21).
  • the room includes an internal cavity (22) being divided by the piston into two volumes (220, 221), variable depending on the displacement of the piston in said cavity.
  • the piston (21) is crossed by one or more orifices (210) allowing the passage of the fluid from the first volume (220) into the second (221) and vice versa.
  • the internal cavity (22) has at least two parts; the first part of narrowed cross section (S1) followed by a second section portion increased transverse (S2).
  • the piston moves in the first part of cross section (S1) corresponding, substantially to that piston.
  • the fluid passes from the second volume (221) to the first volume (220) through the provided through holes (210).
  • a real effect damping is created which means that the more precipitous and sudden the displacement, the more the mixture of gas and liquid has a damping effect on the piston due to inertia, when it passes through the orifices.
  • one or more means of guide (6) located between said resistance means and the fixed end (30). This way is all the more effective as the ski must undergo strong flexions in certain terrain conditions or for certain disciplines.
  • the rigid connection means (4) allowing the blade to be joined to the ski, in all the cases described above, can be a removable means of the screwing, riveting or other type, or even an irremovable means such as gluing or vibration welding, for example.
  • the elongate member (2) can take any desired shape. It can be a blade flexible in the form of an elongated flat plate or on the contrary of a profile having one or more longitudinal ribs to increase its resistance to buckling. It can be made by injection in charged plastic material. In the use of high modulus materials such as steel or carbon, the blade can be replaced by a simple cylindrical or rectangular ring of low section, so as not to exceed excessively large compression values.
  • the device can be placed on the ski at any place, other than on the front.
  • the blade (2) can also serve as a platform to support fasteners as illustrated in figure 11.
  • the blade (2) must have a sufficient width to receive the fasteners (11, 12) which are integral with it directly to allow normal operation of the device.

Landscapes

  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Fluid-Damping Devices (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

The ski is equipped with a device (2) designed to modify its rigidity and/or damp vibrations. This consists of an elongated member (3) which is situated lengthwise and connected at one end to the ski by a rigid fixing at one end while its other end is able to move lengthwise relative to the ski. The movable end of the elongated member is connected to a variable resistance, either in the form of friction shoes or a liquid/gas damper comprising a sealed chamber (20) containing the gas or fluid and a piston (21) on the end of the lengthwise element which moves inside the chamber. The chamber increases progressively in cross-section, so that the resistance to the piston diminishes from one end of the chamber to the other. The elongated member is in the shape of a flexible vane and can be equipped with reinforcing ribs. <IMAGE>

Description

L'invention concerne un ski perfectionné muni d'un dispositif destiné à modifier la raideur et/ou l'amortissement, en fonction de la déformée du ski.The invention relates to an improved ski provided with a device intended to modify stiffness and / or damping, depending on the deformation of the ski.

La plupart des amortisseurs ou systèmes de raidissement existants, sont prévus de telle sorte que la réponse en terme d'amortissement et de raideur est proportionnelle à la force de flexion exercée sur le ski (ce que le spécialiste appelle 'la déformée' du ski). Un tel exemple de système connu du document US-A-5,251,923 est illustré aux figures 1 à 3. Le dispositif comprend une tige dont une extrémité est fixée rigidement à un endroit donné du ski et l'autre extrémité est libre en translation en dessous d'une flexion déterminée (f1) du ski.Most existing shock absorbers or stiffening systems are provided so the answer in terms of damping and stiffness is proportional to the bending force exerted on the ski (what the specialist calls 'deformed' of the ski). Such an example of a system known from document US-A-5,251,923 is illustrated in Figures 1 to 3. The device comprises a rod, one of which end is rigidly fixed to a given location on the ski and the other end is free in translation below a determined flexion (f1) of the ski.

Dans cette première configuration (figure 1) ; le ski est une poutre ayant sa rigidité propre (R) qui augmente de façon sensiblement linéaire en fonction de la flexion. Au-dessus d'une certaine valeur de flexion (f1) ; l'extrémité libre coopère avec un système de butée qui s'oppose au déplacement de la tige dont la rigidité s'additionne à celle du ski (figure 3). Autrement dit, au-delà d'une valeur de flexion limite (f1), le ski devient beaucoup plus raide et directif.In this first configuration (Figure 1); skiing is a beam having its inherent stiffness (R) which increases substantially linearly depending on the bending. Above a certain bending value (f1); the free end cooperates with a stop system which opposes the displacement of the rod whose rigidity adds to that of skiing (Figure 3). In other words, beyond a bending value limit (f1), the ski becomes much steeper and more directional.

Or, le demandeur a constaté qu'un ski muni d'un tel dispositif conduit à obtenir un engin très guidant donc très stable mais, à l'inverse, difficilement manoeuvrable. Partant de cette constatation, le demandeur a recherché les solutions pouvant amener au meilleur compromis stabilité/facilité de pivotement pour obtenir un ski performant dans toutes les situations de conduite à grande vitesse. En particulier, il a été montré qu'à plat ou lors de l'engagement de courbes à grand rayon, il était nécessaire d'avoir un ski suivant parfaitement la trajectoire avec une grande précision et une bonne stabilité. Il faut donc augmenter ou tout au moins conserver les qualités de raideur et d'amortissement des dispositifs antérieurs.However, the applicant has observed that a ski provided with such a device results in obtaining a very guiding machine therefore very stable but, conversely, difficult to maneuver. On the basis of this observation, the applicant sought solutions that could bring to the best compromise stability / ease of pivoting to obtain a ski efficient in all high-speed driving situations. In particular, it has been shown to be flat or when engaging large radius curves, it was necessary to have a ski perfectly following the trajectory with a large precision and good stability. We must therefore increase or at least keep the stiffness and damping qualities of the prior devices.

A l'inverse, il a été également constaté qu'il était nécessaire de faciliter la déformée du ski pour faciliter la rentrée en courbe serrée pour avoir un ski pivotant également facilement.Conversely, it was also found that it was necessary to facilitate the deformed ski to facilitate re-entry into a tight curve to have a pivoting ski also easily.

Parmi les dispositifs de l'art antérieur, on retrouve un effet de raidissement proportionnel à la flexion exercée sur le ski dans le document FR-A-2 689 411. Dans ce cas, le ski comprend deux éléments de raidissement rapportés sur le corps de base et qui coopèrent entre eux à partir d'une valeur de flexion donnée de façon à augmenter la raideur globale du ski.Among the devices of the prior art, there is a stiffening effect proportional to the flexion exerted on the ski in document FR-A-2 689 411. In this case, the ski comprises two stiffening elements attached to the basic body and which cooperate with each other from a given bending value of so as to increase the overall stiffness of the ski.

Dans les documents FR-A-2 675 392, 2 678 517 et 2 694 205 ; les dispositifs sont des amortisseurs qui fonctionnent également selon le principe que lorsque la déformée du ski augmente, la réponse en terme d'amortissement augmente proportionnellement. In documents FR-A-2 675 392, 2 678 517 and 2 694 205; the devices are shock absorbers which also operate on the principle that when the deformed ski increases, the response in terms of damping increases proportionally.

Dis l'état de l'art, il est également connu à l'inverse que pour faciliter le pivotement autour du centre de gravité du skieur, il est préférable de soulager les extrémités du ski de la pression exercée par le poids du skieur.Say the state of the art, it is also known conversely that to facilitate pivoting around of the skier's center of gravity, it is better to relieve the ends of the ski from the pressure exerted by the weight of the skier.

Par exemple, le document FR-A-2 654 635 concerne un dispositif de montage d'une chaussure sur un ski comprenant une butée avant, une talonnière et un orgie de liaison rigide s'étendit longitudinalement entre la butée avant et la talonnière. Le dispositif comprend également des moyens pour produire, en l'absence de chaussure, une précontrainte de tension longitudinale dis l'organe de liaison. Ce dispositif permet de modifier à volonté le cambrage de la zone du patin du ski et donc de soulager les extrémités du ski de la pression exercée par le poids du skieur.For example, document FR-A-2 654 635 relates to a device for mounting a boot on a ski comprising a front stop, a heel piece and a rigid connection orgy extended longitudinally between the front stop and the heel piece. The device includes also means for producing, in the absence of a shoe, a tension preload longitudinal say the connecting member. This device makes it possible to modify the camber at will of the ski skid area and therefore relieve the ends of the ski from the pressure exerted by the weight of the skier.

Encore, un tel enseignement est décrit dis les documents de l'art antérieur tel que dans les documents DE-GM-79 12 699 et FR 810 762. L'invention décrite dis ces deux documents concerne un ski muni d'une embase à cambre inversé sur lequel est rapporté un raidisseur à cambre normal. Ainsi, lorsque le ski est soulagé du poids du skieur, les extrémités se soulèvent par l'effet du cambre de l'embase et lorsque le skieur appuie sur le ski, le raidisseur annule le cambre de l'embase et plaque les extrémités sur la neige. L'inconvénient de ces dispositifs réside dis le fait qu'au moment de la prise de virage, aucun soulagement des extrémités du ski ne peut réellement intervenir en raison du fait que le skieur imprime un effort important sur le ski pour éviter tout dérapage. Il convient de constater que de tels dispositifs sont inefficaces et ne répondent pas en terme de solution aux réalités de fonctionnement d'un ski sur neige.Again, such teaching is described in the documents of the prior art as in the documents DE-GM-79 12 699 and FR 810 762. The invention described says these two documents relates to a ski provided with a reverse camber base on which a stiffener is attached to normal camber. So when the ski is relieved of the skier's weight, the ends are lifted by the effect of the camber of the base and when the skier presses on the ski, the stiffener cancels the camber of the base and plate the ends on the snow. The disadvantage of these devices res say the fact that at the time of the turn, no relief of the ends of the ski cannot really intervene due to the fact that the skier exerts a significant effort on the ski to avoid skidding. It should be noted that such devices are ineffective and do not respond in terms of solution to the realities of operation of a ski on snow.

Enfin, dis l'art antérieur, on connait le document FR-A-2 686 798 qui a pour objet un dispositif interactif visant au contraire à augmenter la pression sur les extrémités "actives" du ski par appui direct de la chaussure sur le dispositif. Par extrémité "active", il faut entendre les parties en contaet avec la neige par opposition aux extrémités relevées que sont la spatule et le talon.Finally, say the prior art, we know the document FR-A-2 686 798 which relates to a interactive device aiming instead to increase the pressure on the "active" ends of the ski by direct support of the boot on the device. By "active" end is meant the parts in contact with the snow as opposed to the raised ends which are the spatula and the heel.

Dans le cas de la présente invention, la chaussure n'exerce aucun effet direct sur le dispositif visant à modifier la répartition de pression sur la neige.In the case of the present invention, the shoe has no direct effect on the device aiming to modify the pressure distribution on snow.

Le but de la présente invention est donc de proposer un ski muni d'un dispositif de raidissement et/ou d'amortissement dont l'effet agit de façon inversement proportionnelle à la flexion exercée sur le ski de façon à obtenir un engin qui présente des propriétés de stabilité et/ou d'amortissement à plat et des propriétés de pivotement et nervosité lors de l'engagement de courbes serrées.The object of the present invention is therefore to propose a ski provided with a device for stiffening and / or damping whose effect acts inversely proportional to the flexion exerted on the ski so as to obtain a machine which has stability properties and / or flat damping and pivoting and nervousness properties during engagement tight curves.

Pour cela, le ski selon l'invention est muni d'une poutre et d'un dispositif comprenant :

  • au moins un élément allongé orienté longitudinalement par rapport au ski ; reliée au ski par un moyen de liaison rigide et qui comprend au moins une extrémité libre, apte à se déplacer longitudinalement par rapport au ski lorsque le ski est sollicité en flexion, et espacée longitudinalement dudit moyen de liaison rigide ;
  • un moyen de résistance relié au ski, qui coopère avec ladite extrémité libre pour s'opposer à son déplacement lorsque le ski est sollicité en flexion et lorsqu'il est sollicité vers une condition de repos, ces caractéristiques se retrouvant dans le document FR-A-2 678 517.
For this, the ski according to the invention is provided with a beam and a device comprising:
  • at least one elongated element oriented longitudinally with respect to the ski; connected to the ski by a rigid connection means and which comprises at least one free end, able to move longitudinally relative to the ski when the ski is stressed in flexion, and spaced longitudinally of said rigid connection means;
  • a resistance means connected to the ski, which cooperates with said free end to oppose its movement when the ski is stressed in bending and when it is stressed towards a rest condition, these characteristics being found in the document FR-A -2,678,517.

Le ski selon l'invention est caractérisé en ce que la force de résistance dudit moyen de résistance qui s'oppose au déplacement de ladite extrémité libre diminue entre une force de résistance forte obtenue pour une position de déplacement minimale de l'extrémité libre lorsque le ski est peu déformé en flexion, et une force de résistance faible obtenue pour une position de déplacement maximale de l'extrémité libre lorsque le ski est fortement déformé en flexion. Ainsi, lorsque le ski est peu sollicité en flexion c'est-à-dire en conduite à plat ou en grande courbe, l'effet de raidissement et/ou d'amortissement est prépondérant. On obtient un ski stable et suivant parfaitement sa trajectoire. De même, lorsque le ski est déformé en prise de virage plus serré, l'effet sus-mentionné est moins important conduisant ainsi à obtenir un ski pivotant et parfaitement maítrisable.The ski according to the invention is characterized in that the resistance force of said means of resistance which opposes the movement of said free end decreases between a force of strong resistance obtained for a position of minimal displacement of the free end when the ski is slightly deformed in flexion, and a low resistance force obtained for a position of maximum displacement of the free end when the ski is strongly deformed in bending. Thus, when the ski is little used in bending, i.e. driving flat or on a long curve, the stiffening effect and / or depreciation is preponderant. We get a stable and following ski perfectly its trajectory. Similarly, when the ski is deformed when cornering tighter, the above-mentioned effect is less significant, thus leading to a pivoting ski and perfectly controllable.

Selon un mode particulier ; ledit moyen de résistance comprend deux régimes distincts de fonctionnement en fonction du déplacement de ladite extrémité libre par rapport au ski ;

  • un premier régime durant lequel une certaine force de résistance s'oppose au déplacement de ladite extrémité libre en dessous d'une valeur de déplacement prédéterminée et,
  • un second régime durant lequel la force de résistance qui s'oppose au déplacement de ladite extrémité libre est nulle ou tout au moins inférieure à la force de résistance du premier régime à partir et au-delà de ladite valeur de déplacement prédéterminée.
According to a particular mode; said resistance means comprises two distinct operating regimes as a function of the movement of said free end relative to the ski;
  • a first regime during which a certain resistance force opposes the displacement of said free end below a predetermined displacement value and,
  • a second regime during which the resistance force which opposes the displacement of said free end is zero or at least less than the resistance force of the first regime from and beyond said predetermined displacement value.

Selon un autre mode ; on prévoit que la diminution de la force de résistance entre la position minimale de déplacement et la position maximale de déplacement est progressive.According to another mode; the decrease in resistance force is expected between the minimum displacement position and the maximum displacement position is progressive.

De préférence, l'élément allongé est reliée rigidement au ski par son extrémité opposée à l'extrémité libre de façon à ce que la distance entre le moyen de liaison rigide soit le plus éloigné possible du moyen de résistance et augmente l'amplitude de déplacement de l'extrémité libre.Preferably, the elongated element is rigidly connected to the ski by its end opposite the free end so that the distance between the connecting means rigid as far as possible from the resistance means and increases the amplitude of displacement of the free end.

Dans un premier mode de réalisation, l'extrémité libre de l'élément allongé comprend une augmentation de section et coopère avec des moyens de frottement appartenant au moyen de résistance en dessous de ladite valeur de déplacement prédéterminé ; ladite augmentation de section étant, en partie au moins, dégagée desdits moyens de frottement à partir et au-delà de ladite valeur de déplacement de façon à permettre un libre coulissement de l'élément allongé.In a first embodiment, the free end of the elongated element includes an increase in cross-section and cooperates with friction means belonging to the resistance means below said displacement value predetermined; said increase in section being, at least in part, cleared of said friction means from and beyond said displacement value so as to allow free sliding of the elongated element.

Avantageusement, les moyens de frottement sont constitués par au moins deux patins de frottement en matériau à coefficient de frottement élevé ; ledit moyen de résistance comprenant également un organe de pression qui comprime les patins de frottement contre les surfaces de l'extrémité libre.Advantageously, the friction means consist of at least two friction pads made of a material with a high coefficient of friction; said means of resistance also comprising a pressure member which compresses the pads of friction against the surfaces of the free end.

Selon un autre mode, l'extrémité libre de l'élément allongé comprend une augmentation de section qui coopère avec des premiers moyens de frottement du moyen de résistance, en dessous de ladite valeur de déplacement prédéterminée ; puis avec des seconds moyens de frottement, à partir de et au-delà de ladite valeur de déplacement ; le matériau choisi pour constituer les seconds moyens de frottement ayant un coefficient de frottement inférieur à celui du matériau choisi pour constituer les premiers moyens. According to another embodiment, the free end of the elongated element comprises a increased section which cooperates with the first friction means of the resistance means, below said predetermined displacement value; then with second friction means, from and beyond said value of displacement ; the material chosen to constitute the second means of friction with a lower coefficient of friction than the chosen material to constitute the first means.

Selon un mode de construction, le moyen de résistance est un amortisseur à fluide liquide ou gazeux comprenant une chambre étanche ayant une cavité interne, un piston relié à ladite extrémité libre et traversant ladite chambre.According to one mode of construction, the resistance means is a shock absorber liquid or gaseous fluid comprising a sealed chamber having a cavity internal, a piston connected to said free end and passing through said chamber.

Selon une caractéristique particulière, ledit piston se déplace dans au moins deux parties de sections transversales différentes ; une première partie de section en deçà de ladite valeur de déplacement prédéterminée et une seconde partie de section supérieure à la section de la première partie à partir et au-delà de ladite.According to a particular characteristic, said piston moves in at least two parts of different cross sections; the first part of the section below said predetermined displacement value and a second part of upper section than the section of the first part from and beyond of said.

Selon une caractéristique générale de l'invention, le dispositif comprend au moins un moyen de guidage longitudinal en translation de l'élément allongé entre l'extrémité libre et le moyen de liaison rigide, pour améliorer sa résistance au flambage.According to a general characteristic of the invention, the device comprises at less a means for longitudinal guiding in translation of the elongated element between the free end and the rigid connection means, to improve its resistance to buckling.

D'autres objets, et caractéristiques et avantages de l'invention ressortiront de la description suivante de modes de réalisations particuliers, faits en relation avec les figures jointes, parmi lesquelles :

  • la figure 1 est une vue partielle d'un ski muni d'un dispositif de raidissement selon le brevet de l'art antérieur US-A-5,251,923 ;
  • la figure 2 est une vue similaire à celle de la figure 1 lorsque le ski est soumis à une flèche déterminée ;
  • la figure 3 est un graphe illustrant la variation de raideur globale (R) en fonction de la flèche subie par le ski selon le mode de l'art antérieur ;
  • la figure 4 est une vue de profil du ski, au repos, selon un premier mode de réalisation de l'invention ;
  • la figure 4a est une vue de détail du dispositif de la figure 4, dans la première configuration de fonctionnement ; c'est-à-dire dans une position de déplacement minimale (P1) ;
  • la figure 4b est une vue en coupe selon I-I de la vue de la figure 4a ;
  • la figure 5 est une vue de profil du ski selon le premier mode de l'inventon, lorsqu'il est sollicité en flexion et soumis à une certaine flèche, dans une position de déplacement maximale (P2) ;
  • la figure 5a est une vue de détail du dispositif de la figure 5 ;
  • la figure 5b est une vue en coupe selon II-II de la vue de la figure 5a ;
  • la figure 6 est un graphe illustrant la variation de raideur (R) en fonction du déplacement (d) de l'extrémité libre de la lame sur le ski ;
  • la figure 7 est une vue similaire à la vue de la figure 5a selon une variante ;
  • la figure 8 est une vue partielle d'un ski muni d'un dispositif d'amortissement hydraulique ou pneumatique selon un second mode de réalisation de l'invention ;
  • la figure 9 est une vue partielle similaire à la vue de la figure 7 à partir d'une certaine valeur de déplacement de la lame sur le ski ;
  • la figure 10 est une vue similaire à la vue de la figure 8 selon une variante ;
  • la figure 11 est une vue similaire à la vue de la figure 1 dans le cas où le dispositif sert de support des fixations.
Other objects, and characteristics and advantages of the invention will emerge from the following description of particular embodiments, made in relation to the attached figures, among which:
  • Figure 1 is a partial view of a ski provided with a stiffening device according to the patent of the prior art US-A-5,251,923;
  • Figure 2 is a view similar to that of Figure 1 when the ski is subjected to a determined deflection;
  • FIG. 3 is a graph illustrating the variation in overall stiffness (R) as a function of the deflection experienced by the ski according to the mode of the prior art;
  • Figure 4 is a side view of the ski, at rest, according to a first embodiment of the invention;
  • Figure 4a is a detail view of the device of Figure 4, in the first operating configuration; that is to say in a minimum displacement position (P1);
  • Figure 4b is a sectional view along II of the view of Figure 4a;
  • FIG. 5 is a side view of the ski according to the first mode of the invention, when it is stressed in bending and subjected to a certain deflection, in a position of maximum displacement (P2);
  • Figure 5a is a detail view of the device of Figure 5;
  • Figure 5b is a sectional view along II-II of the view of Figure 5a;
  • FIG. 6 is a graph illustrating the variation in stiffness (R) as a function of the displacement (d) of the free end of the blade on the ski;
  • Figure 7 is a view similar to the view of Figure 5a according to a variant;
  • FIG. 8 is a partial view of a ski provided with a hydraulic or pneumatic damping device according to a second embodiment of the invention;
  • Figure 9 is a partial view similar to the view of Figure 7 from a certain value of displacement of the blade on the ski;
  • Figure 10 is a view similar to the view of Figure 8 according to a variant;
  • Figure 11 is a view similar to the view of Figure 1 in the case where the device serves to support the fasteners.

Le ski de l'invention illustré à la figure 4 comprenant le dispositif est constitué par une poutre allongée (1) ayant sa propre distribution d'épaisseur, de largeur et donc sa raideur propre. Il comprend une partie centrale (10) appelée aussi zone de montage des fixations (11, 12) destinés à retenir la chaussure sur le ski. L'extrémité avant (13) de la poutre (1) est relevée pour former la spatule ; tandis que l'extrémité arrière (14) l'est également pour former le talon. La poutre comprend par ailleurs une surface inférieure de glissement (15) et une surface supérieure (16). Notons que le contact de la surface inférieure (15) avec la neige se fait entre le point avant de contact (150) et le point arrière de contact (151) correspondant réciproquement aux endroits où ladite surface inférieure commence à se relever.The ski of the invention illustrated in FIG. 4 comprising the device consists of an elongated beam (1) having its own distribution of thickness, width and therefore its own stiffness. It includes a central part (10) also called mounting of the bindings (11, 12) intended to retain the boot on the ski. The end front (13) of the beam (1) is raised to form the spatula; while the end rear (14) is also to form the heel. The beam also includes a lower sliding surface (15) and an upper surface (16). Note that the contact of the lower surface (15) with the snow takes place between the front point contact (150) and the rear contact point (151) corresponding to each other where said lower surface begins to rise.

La figure 4 illustre un premier mode de réalisation de l'invention qui comprend un dispositif de raidissement ou d'amortissement rapporté (2) disposé à l'avant de la poutre (1), sur sa surface supérieure (16). Ce dispositif comprend un élément allongé constitué d'une lame flexible (3) ayant une première extrémité fixe (30) solidarisée à la surface supérieure (16) par un moyen de liaison rigide (4) ; et une seconde extrémité libre (31) qui coopère avec un moyen de résistance (5) qui s'oppose au déplacement relatif de ladite extrémité libre (31) par rapport à la surface supérieure (16) du ski lorsque le ski est sollicité en flexion.FIG. 4 illustrates a first embodiment of the invention which comprises an attached stiffening or damping device (2) disposed at the front of the beam (1), on its upper surface (16). This device includes an element elongated consisting of a flexible blade (3) having a first fixed end (30) secured to the upper surface (16) by a rigid connection means (4); and an second free end (31) which cooperates with a resistance means (5) which opposes the relative movement of said free end (31) relative to the upper surface (16) of the ski when the ski is stressed in bending.

Comme le montre la figure 4a et 4b, le moyen de résistance (5) comprend des moyens de frottement constitué par deux patins de frottement respectivement supérieur (50) et inférieur (51) en matériau à coefficient de frottement élevé. Le moyen de résistance (5) comprend également un étrier d'appui et de retenue (52). Les surfaces de frottement de chaque patin (50, 51) sont séparées l'une de l'autre d'une certaine distance (e) correspondant sensiblement à l'épaisseur de l'extrémité libre (31) de section (S1) sur une première longueur (L1) et sur une largeur (l1). Ainsi la surface supérieure (310) et la surface inférieure (311) de ladite extrémité libre sont en contact avec la surface des patins de frottement respectivement supérieur (50) et inférieur (51) en dessous d'une certaine valeur de déplacement (d1) de la lame.As shown in FIG. 4a and 4b, the resistance means (5) comprises friction means constituted by two friction pads respectively upper (50) and lower (51) of material with a high coefficient of friction. The resistance means (5) also comprises a support and retaining stirrup (52). The friction surfaces of each shoe (50, 51) are separated from each other a certain distance (e) corresponding substantially to the thickness of the end free (31) of section (S1) over a first length (L1) and over a width (l1). Thus the upper surface (310) and the lower surface (311) of said end free are in contact with the surface of the friction pads respectively upper (50) and lower (51) below a certain displacement value (d1) of the blade.

Le matériau de frottement peut être constitué par exemple par une couche de caoutchouc thermoplastique ou du matériau viscoélastique. Ainsi, une première couche est collée sur la surface supérieure (16) du ski et une seconde couche est collée sous la paroi centrale de l'étrier de retenue qui a la forme d'un Ω (oméga) et qui est fixé par des vis (520). L'extrémité avant (31) de la lame peut ainsi se déplacer selon F1 et F2 entre les patins de frottement (50, 51). Pour qu'il y ait dissipation d'énergie des mouvements longitudinaux selon F1 et F2, l'étrier maintient une pression et pince la lame entre les deux couches. The friction material may consist, for example, of a layer of thermoplastic rubber or viscoelastic material. So, a first layer is glued to the upper surface (16) of the ski and a second layer is glued under the central wall of the retaining clip which has the shape of an Ω (omega) and which is fixed by screws (520). The front end (31) of the blade can thus be move along F1 and F2 between the friction pads (50, 51). For there to be energy dissipation of the longitudinal movements according to F1 and F2, the stirrup maintains pressure and pinches the blade between the two layers.

Bien entendu, l'intensité ou la force de serrage de la lame de flexion entre les deux couches de frottement par l'étrier peut être réglable en fonction de l'amortissement que l'on veut obtenir.Of course, the intensity or the clamping force of the bending blade between the two layers of friction by the stirrup can be adjustable according to the amortization that we want to obtain.

De même, la position longitudinale du moyen de résistance (5) peut être réglée facilement par la liaison amovible prévue entre l'étrier (52) et la surface supérieure du ski (16).Similarly, the longitudinal position of the resistance means (5) can be adjusted easily by the removable connection provided between the stirrup (52) and the upper surface skiing (16).

Les figures 5, 5a et 5b montrent le ski muni du dispositif dans une seconde figuration de fonctionnement ; c'est-à-dire lorsqu'un seuil de déplacement maximal de l'extrémité libre est atteint dans la direction F1 en fonction de la sollicitation exercée sur la poutre (1). Ainsi, l'extrémité libre de section (S1) est dégagée des patins de frottement (50, 51) et est engagée dans une cavité (53) de section augmentée dans laquelle les surfaces (310, 311) de l'extrémité libre ne sont plus soumises au frottement. La lame comprend d'autre part un rétrécissement (32) de section (S2) qui peut coulisser librement entre les patins (50, 51) sans frottement (e2 étant inférieur à e, en particulier). Dans cette configuration, le moyen de résistance n'oppose plus de force de résistance à l'encontre de l'extrémité libre de la lame ; ce qui fait que le ski devient plus facile à conduire.Figures 5, 5a and 5b show the ski provided with the device in a second operating figuration; that is to say when a maximum displacement threshold of the free end is reached in the direction F1 depending on the stress exerted on the beam (1). Thus, the free section end (S1) is released from the friction pads (50, 51) and is engaged in a section cavity (53) in which the surfaces (310, 311) of the free end are no longer subject to friction. The blade further comprises a narrowing (32) of section (S2) which can slide freely between the pads (50, 51) without friction (e2 being less than e, in particular). In this configuration, the means of resistance no longer opposes a resistance force against the free end of the blade ; which makes skiing easier to drive.

La figure 6 illustre l'allure de la courbe montrant la variation de la raideur globale (R) du ski en fonction du déplacement (d) de l'extrémité libre, lui-même proportionnel à la déformée du ski.Figure 6 illustrates the shape of the curve showing the variation of the overall stiffness (R) of the ski as a function of the displacement (d) of the free end, itself proportional to the deformation of the ski.

De préférence, comme le montre la figure 5a ; la lame comprend une zone de transition (320) entre l'extrémité libre (31) de section forte (S1) et le rétrécissement (3) adjacent de section plus faible (S2) ; dans laquelle la diminution de section se fait progressivement afin de faciliter le retour en place de la lame lorsque le ski reprend sa forme initiale.Preferably, as shown in Figure 5a; the blade includes an area of transition (320) between the free end (31) of strong section (S1) and the narrowing (3) adjacent of smaller section (S2); in which the reduction in cross section done gradually to facilitate the return in place of the blade when the ski returns to its original shape.

La figure 7 illustre une variante du mode précédent.FIG. 7 illustrates a variant of the previous mode.

La lame comprend également une extrémité libre (31) avec augmentation de section suivie d'un rétrécissement (32). Ladite extrémité libre (31) coopère avec un moyen de résistance (5) qui comprend, en premier une série de patin (50a, 51a) choisi dans un matériau ayant un coefficient de frottement déterminé et, ensuite, une seconde série de patin (50b, 51b), adjacent à la première série, et choisi dans un matériau ayant un coefficient de frottement inférieur au matériau de la première série. Ainsi, dès que l'extrémité libre (31) qui se déplace dans le sens F1 atteint le niveau de la seconde série, la force de résistance qui s'oppose au déplacement de la lame diminue.The blade also includes a free end (31) with increased section followed by a narrowing (32). Said free end (31) cooperates with a resistance means (5) which comprises, first of all a series of pads (50a, 51a) chosen from a material with a determined coefficient of friction and then a second series of skids (50b, 51b), adjacent to the first series, and chosen from a material having a coefficient of friction lower than the material of the first series. Thus, as soon as the free end (31) which moves in the direction F1 reaches the level of the second series, the resistance force that opposes the displacement of the blade decreases.

Les figures 8 à 10 illustrent un autre mode de réalisation de l'invention dans lequel le moyen de résistance du type frottement est remplacé par un amortisseur à fluide liquide ou gazeux. Dans ce cas, l'amortisseur comprend, au moins deux régimes de fonctionnement distincts dans le cas des figures 8 et 9 et un seul régime d'évolution progressive dans le cas de la figure 10.Figures 8 to 10 illustrate another embodiment of the invention in which the friction type resistance means is replaced by a shock absorber with liquid or gaseous fluid. In this case, the shock absorber comprises, at least two separate operating modes in the case of FIGS. 8 and 9 and only one progressive evolution regime in the case of Figure 10.

Le dispositif d'amortissement (2) comprend une lame (3) ayant également une extrémité fixe (30) et une extrémité libre (31). Ladite extrémité libre s'engage dans une chambre étanche (20) et se termine par un piston (21). La chambre comprend une cavité interne (22) se trouvant divisée par le piston en deux volumes (220, 221), variables en fonction du déplacement de piston dans ladite cavité.The damping device (2) comprises a blade (3) also having a fixed end (30) and a free end (31). Said free end engages in a sealed chamber (20) and ends with a piston (21). The room includes an internal cavity (22) being divided by the piston into two volumes (220, 221), variable depending on the displacement of the piston in said cavity.

Le piston (21) est traversé par un ou plusieurs orifices (210) permettant le passage du fluide du premier volume (220) dans le second (221) et inversement.The piston (21) is crossed by one or more orifices (210) allowing the passage of the fluid from the first volume (220) into the second (221) and vice versa.

La cavité interne (22) présente, au moins, deux parties ; une première partie de section transversale rétrécie (S1) suivie d'une seconde partie de section transversale augmentée (S2). En début de course ; c'est-à-dire pour un faible déplacement de l'extrémité libre (31) de la lame (3) ; le piston se déplace dans la première partie de section transversale (S1) correspondant, sensiblement à celle du piston. Dans ce cas, le fluide passe du second volume (221) au premier volume (220) à travers les orifices de passage prévus (210). Un véritable effet d'amortissement est crée qui fait que, plus le déplacement est précipité et brutal, plus le mélange de gaz et de liquide exerce un effet d'amortissement sur le piston en raison de l'inertie, lorsqu'il traverse les orifices. Par la poursuite de la course du piston (20) dans la partie de section augmentée (S2), à partir d'une arête de détente (23) atteint par le piston, le fluide (liquide ou gaz) peut alors s'écouler librement à travers l'augmentation de section crée (222) d'un volume à l'autre ; de sorte que l'effet d'amortissement se trouve fortement diminué à partir d'un certain déplacement.The internal cavity (22) has at least two parts; the first part of narrowed cross section (S1) followed by a second section portion increased transverse (S2). At the start of the race; that is to say for a low displacement of the free end (31) of the blade (3); the piston moves in the first part of cross section (S1) corresponding, substantially to that piston. In this case, the fluid passes from the second volume (221) to the first volume (220) through the provided through holes (210). A real effect damping is created which means that the more precipitous and sudden the displacement, the more the mixture of gas and liquid has a damping effect on the piston due to inertia, when it passes through the orifices. By continuing the race from piston (20) in the increased section part (S2), from an edge of trigger (23) reached by the piston, the fluid (liquid or gas) can then flow freely through the increase in section created (222) from one volume to another; of so that the damping effect is greatly reduced from a certain displacement.

Pour le retour du piston, c'est l'élasticité propre du ski qui s'exerce, à la façon d'un ressort de rappel permettant au dispositif de reprendre sa configuration initiale.For the return of the piston, it is the inherent elasticity of the ski which is exerted a return spring allowing the device to resume its configuration initial.

Pour éviter tout risque de flambage de la lame et un meilleur coulissement à l'intérieur du moyen de résistance (5), on peut prévoir un ou plusieurs moyen de guidage (6) situé entre ledit moyen de résistance et l'extrémité fixe (30). Ce moyen est d'autant plus efficace que le ski doit subir de fortes flexions dans certaines conditions de terrains ou pour certaines disciplines.To avoid any risk of blade buckling and better sliding at inside the resistance means (5), one or more means of guide (6) located between said resistance means and the fixed end (30). This way is all the more effective as the ski must undergo strong flexions in certain terrain conditions or for certain disciplines.

Dans le cas particulier de la figure 10, on obtient une diminution progressive de l'effet d'amortissement, qui se traduit par une diminution de la force de résistance qui s'oppose au déplacement du piston (21) entre la position minimale P1 et la position maximale P2. On prévoit pour cela une augmentation progressive de la section transversale de la cavité interne (22) dans la direction du déplacement F1 de la lame lorsque le ski est sollicité en flexion. In the particular case of FIG. 10, we obtain a progressive decrease of the damping effect, which results in a decrease in the resistance force which opposes the displacement of the piston (21) between the minimum position P1 and the maximum position P2. This is expected to gradually increase the cross section of the internal cavity (22) in the direction of movement F1 of the blade when the ski is flexed.

Le moyen de liaison rigide (4) permettant la solidarisation de la lame sur le ski, dans tous les cas de figure décrits précédemment, peut être un moyen démontable du type vissage, rivetage ou autre, ou encore un moyen inamovible tel que collage ou soudage par vibration, par exemple.The rigid connection means (4) allowing the blade to be joined to the ski, in all the cases described above, can be a removable means of the screwing, riveting or other type, or even an irremovable means such as gluing or vibration welding, for example.

L'élément allongé (2) peut prendre toute forme voulue. Il peut s'agir d'une lame flexible sous forme d'une plaque plane allongée ou au contraire d'un profilé ayant une ou plusieurs nervures longitudinales permettant d'augmenter sa résistance au flambage. Elle peut être réalisée par injection en matière plastique chargée. Dans le cas d'utilisation de matériaux à haut module tel que l'acier ou le carbone, la lame peut être remplacée par un simple jonc cylindrique ou rectangulaire de faible section, afin de ne pas dépasser des valeurs de compression trop importantes.The elongate member (2) can take any desired shape. It can be a blade flexible in the form of an elongated flat plate or on the contrary of a profile having one or more longitudinal ribs to increase its resistance to buckling. It can be made by injection in charged plastic material. In the use of high modulus materials such as steel or carbon, the blade can be replaced by a simple cylindrical or rectangular ring of low section, so as not to exceed excessively large compression values.

Il va de soi que le dispositif peut être disposé sur le ski à tout endroit, ailleurs que sur l'avant.It goes without saying that the device can be placed on the ski at any place, other than on the front.

D'une façon avantageuse, il peut aussi servir de plateforme pour supporter les fixations comme illustré à la figure 11. Dans ce cas, la lame (2) doit présenter une largeur suffisante pour recevoir les fixations (11, 12) qui lui sont solidarisées directement pour permettre un fonctionnement normal du dispositif.Advantageously, it can also serve as a platform to support fasteners as illustrated in figure 11. In this case, the blade (2) must have a sufficient width to receive the fasteners (11, 12) which are integral with it directly to allow normal operation of the device.

Bien entendu, l'invention n'est pas limité aux modes de réalisation décrits et représentés à titre d'exemples, mais elle comprend aussi tous les équivalents techniques ainsi que leurs combinaisons. Ainsi, le spécialiste peut envisager le remplacement du moyen de résistance par d'autres moyens équivalents sans pour autant sortir de la portée de l'invention.Of course, the invention is not limited to the embodiments described and shown as examples, but it also includes all equivalents techniques and their combinations. So the specialist can consider the replacement of the means of resistance by other equivalent means without as well go beyond the scope of the invention.

Claims (14)

  1. Ski provided with a beam (1) and a device (2) adapted to modify the stiffness and/or shock absorption of vibrations, comprising:
    at least one elongated element (3) oriented longitudinally with respect to the ski; connected to the ski by a rigid linkage means (4) and including at least one free end (31), capable of displacing itself longitudinally with respect to the ski when the ski is biased in flexion and longitudinally spaced from said rigid linkage means;
    a resistance means (5) connected to the ski that cooperates with said free end (31) to resist its displacement when the ski is biased in flexion and when it is biased towards a resting state;
    characterized in that the resistance force of said resistance means (5) that resists the displacement of said free end (31) decreases between a substantial resistance force obtained for a minimum displacement position (P1) of the free end (31) when the ski is slightly deformed in flexion, and a low resistance force obtained for a maximum displacement position (P2) of the free end (31) when the ski is substantially deformed in flexion.
  2. Ski according to claim 1, characterized in that said resistance means comprises two distinct operating conditions depending on the displacement of said free end with respect to the ski:
    a first condition during which a certain resistance force resists the displacement of said free end (31) below a predetermined displacement value (d1); and
    a second condition during which the resistance force that resists the displacement of said free end (31) is zero or less than the resistance force of the first condition, from and beyond said predetermined displacement value (d1).
  3. Ski according to claim 2, characterized in that the free end (31) of the elongated element (3) includes an increased section (S1) and cooperates with friction means belonging to the resistance means (5) below said predetermined displacement value; said increased section being, at least partially, disengaged from said friction means from and beyond said displacement value (d1) so as to enable a free sliding of the blade.
  4. Ski according to claim 3, characterized in that the friction means are comprised of at least two friction plates (50, 51) made of a material having a high friction coefficient; said resistance means also comprising a pressure member (52) that compresses the friction plates (50, 51) against the surfaces of the free end (31).
  5. Ski according to claim 2, characterized in that the free end (31) of the blade (3) has an increased section (S1) that cooperates with first friction means (50a, 51a) of the resistance means (5), below said predetermined displacement value, then with second friction means (50b, 51b), from and beyond said displacement value; the material selected to constitute the second friction means having a friction coefficient less than that of the material chosen to comprise the first means.
  6. Ski according to claim 1, characterized in that the resistance means (5) is a liquid or gaseous fluid shock absorber comprising an impermeable chamber (20) having an internal cavity (22), a piston (21) connected to said free end (31) and extending through said chamber (20).
  7. Ski according to claim 6, characterized in that said piston (21) displaces itself in at least two portions having different transverse sections, a first portion having a section (S1) within said predetermined displacement value, and a second portion having a section (S2) greater than the section (S1) of the first portion from and beyond said first portion.
  8. Ski according to claim 7, characterized in that the two portions having different transverse sections are separated by an expansion ramp (23).
  9. Ski according to claim 1, characterized in that the decrease of the resistance force between the minimum displacement position (P1) and the maximum displacement position (P2) is progressive.
  10. Ski according to claim 8, characterized in that the resistance means (5) is a liquid or gaseous fluid shock absorber comprising an impermeable chamber (20) having an internal cavity (22), a piston (21) connected to said free end (31) and extending through said chamber (20), said internal cavity (22) having a progressive transverse section increase in the displacement direction F1 of the blade when the ski is biased in flexion.
  11. Ski according to claim 6 or 9, characterized in that the piston (21) is traversed by one or several orifices (s) enabling the passage of the fluid from a first volume (220) into the second (221) and vice versa.
  12. Ski according to any of the preceding claims, characterized in that the device comprises at least one longitudinal guiding means (6) in translation of the blade between the free end (31) and the rigid linkage means (4).
  13. Ski according to any of the preceding claims, characterized in that said rigid linkage means (4) is located at the opposite end (30) of the free end (31).
  14. Ski according to any of the preceding claims, characterized in that the elongated element (3) is comprised of a flexible blade or a cross-section having one or several longitudinal ribs or a cylindrical or rectangular rod having a weak section.
EP95104526A 1994-05-18 1995-03-28 Alpine ski provided with a stiffening and/or damping device double-action Expired - Lifetime EP0682961B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406218A FR2720007B1 (en) 1994-05-18 1994-05-18 Alpine ski with a double-acting stiffening and / or damping device.
FR9406218 1994-05-18

Publications (2)

Publication Number Publication Date
EP0682961A1 EP0682961A1 (en) 1995-11-22
EP0682961B1 true EP0682961B1 (en) 1998-08-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95104526A Expired - Lifetime EP0682961B1 (en) 1994-05-18 1995-03-28 Alpine ski provided with a stiffening and/or damping device double-action

Country Status (6)

Country Link
US (1) US5597170A (en)
EP (1) EP0682961B1 (en)
JP (1) JPH07313654A (en)
AT (1) ATE170088T1 (en)
DE (1) DE69504234T2 (en)
FR (1) FR2720007B1 (en)

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FR2741814B1 (en) * 1995-12-04 1998-02-13 Salomon Sa DAMPING DEVICE FOR SLIDING BOARD
FR2752743B1 (en) * 1996-08-29 1998-10-30 Salomon Sa SNOW SURFBOARD PROVIDED WITH A DAMPING DEVICE
FR2763862B1 (en) 1997-05-30 1999-08-27 Salomon Sa INTERFACE DEVICE BETWEEN A SHOE AND AN ALPINE SKI
ATE272430T1 (en) * 1998-06-15 2004-08-15 Tyrolia Freizeitgeraete DAMPER FOR DRIVING-RELATED SKI VIBRATIONS
US6267402B1 (en) * 1999-03-30 2001-07-31 Nitinol Technologies, Inc. Nitinol ski structures
AT412839B (en) * 2000-06-02 2005-08-25 Atomic Austria Gmbh SLIDING DEVICE, ESPECIALLY SCHI, SNOWBOARD OR DGL.
DE60119961T2 (en) * 2000-11-17 2006-12-21 Scott Sports S.A. SKI AND SNOWBOARD WITH CHANGING RADIAL GEOMETRY
EP1214958B1 (en) * 2000-12-15 2005-09-21 Marker Deutschland GmbH Vibration damping device for skis etc.
WO2003039686A1 (en) * 2001-11-08 2003-05-15 Scott Sports Sa Device for varying the radial geometry of a ski proportionally to its flexion and ski equipped therewith
GB0129588D0 (en) * 2001-12-11 2002-01-30 Reactec Ltd Improvements in or relating to skis
DE10236152A1 (en) * 2002-08-07 2004-02-19 Marker Deutschland Gmbh Ski and ski binding combination
DE10254471A1 (en) 2002-11-21 2004-06-03 Madsus A/S Ski with binding assembly aid, process for producing such a ski and corresponding assembly aid
US20040178606A1 (en) * 2003-03-11 2004-09-16 Peter Ashley Dynamic damping and stiffening system for sliding boards
CN101102824B (en) * 2004-11-23 2010-05-12 安东·F·威尔逊 Ski with suspension system
US7607679B2 (en) * 2004-11-23 2009-10-27 Anton F. Wilson Suspension system for a ski
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WO2006088908A2 (en) * 2005-02-16 2006-08-24 Wilson Anton F Snowboards
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DE202005021774U1 (en) 2005-08-24 2010-02-04 Krause, Kaspar Alpine skiing
WO2007084744A2 (en) * 2006-01-20 2007-07-26 Wilson Anton F Suspension system for a ski
FR2915905A1 (en) * 2007-05-11 2008-11-14 Rossignol Sa DEVICE FOR ADJUSTING SPATULA OF A SLIDING BOARD
FR2932693A1 (en) * 2008-06-24 2009-12-25 Rossignol Sa IMPROVEMENT FOR SNOWBOARD BOARD ON SNOW
ES2524705B1 (en) * 2013-06-10 2015-09-15 Jorge ROCA GÉNOVA Damping mechanism for skis
EP3115090B1 (en) * 2015-06-19 2019-01-02 Anton F. Wilson Automatically adaptive ski
FR3041267B1 (en) * 2015-09-21 2019-05-24 Skis Rossignol DAMPER DEVICE FOR MOUNTING ON A SNOWBOARD BOARD
US10286288B1 (en) * 2015-12-29 2019-05-14 Alpine Radius Control Technologies, LLC Torsional stabilizer for skis
CN111616663A (en) * 2019-02-27 2020-09-04 佛山市顺德区美的洗涤电器制造有限公司 Dish washing machine

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Also Published As

Publication number Publication date
ATE170088T1 (en) 1998-09-15
JPH07313654A (en) 1995-12-05
US5597170A (en) 1997-01-28
FR2720007A1 (en) 1995-11-24
FR2720007B1 (en) 1996-07-12
EP0682961A1 (en) 1995-11-22
DE69504234T2 (en) 1999-04-29
DE69504234D1 (en) 1998-10-01

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