EP0580935B1 - Verbesserung an einer Amortisationseinrichtung für Skis - Google Patents

Verbesserung an einer Amortisationseinrichtung für Skis Download PDF

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Publication number
EP0580935B1
EP0580935B1 EP93100978A EP93100978A EP0580935B1 EP 0580935 B1 EP0580935 B1 EP 0580935B1 EP 93100978 A EP93100978 A EP 93100978A EP 93100978 A EP93100978 A EP 93100978A EP 0580935 B1 EP0580935 B1 EP 0580935B1
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EP
European Patent Office
Prior art keywords
ski
blade
stirrup
ski according
flexion
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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.)
Expired - Lifetime
Application number
EP93100978A
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English (en)
French (fr)
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EP0580935A1 (de
Inventor
Axel Phelipon
Jacques Le Masson
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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
    • A63C5/075—Vibration dampers

Definitions

  • the present invention relates to a damping device for skiing, such as an alpine ski, a cross-country ski, a monoski or a snowboard. It relates more particularly to an improvement of this type of device, and also relates to a ski equipped with it.
  • skis made thanks to a more or less flexible structure.
  • the structure generally comprises peripheral protection elements, internal resistance elements to resist the flexural and torsional stresses, and a core. These elements are assembled by gluing or by injection, the assembly generally being carried out hot in a mold having the final shape of the ski, with a front part strongly raised in a tip, a rear part slightly raised in the heel, a central arched part. .
  • the present invention seeks to remedy the various drawbacks mentioned above and proposes a particularly simple, effective and reliable solution to the problems of damping vibrations.
  • the ski according to the invention comprises at least one damping device intended to damp the vibrations of a ski, constituted by at least one flexion blade which comprises a first part rigidly fixed to the ski and a second part so connected movable longitudinally by damping means.
  • the damping means are of the viscous friction type, and consist of at least one layer of viscous material chosen from mineral or organic grease.
  • the second part in contact with the damping means is movable by sliding in a stirrup connected to the ski.
  • the second part is spaced longitudinally from the first part.
  • the stirrup has a U shape with a sliding housing open downwards.
  • the stirrup comprises peripheral walls and is in the form of a sealed housing. The tightness guarantees a constant damping value over time (with equal use conditions).
  • the caliper comprises an adjustable or non-pneumatic, hydraulic or elastic pressure member such as a spring which acts on the blade.
  • An adjustable pressure member has the advantage of being able to increase or decrease the damping value according to the use to be made of the ski and according to the atmospheric and temperature conditions. In addition, it allows to correctly adjust the same value of each ski constituting the pair.
  • the bending blade is a blade that is either metallic, aluminum, steel, or a composite material.
  • the invention also relates to the device intended to equip the ski and which comprises a flexion blade and a stirrup comprising a viscous material chosen from mineral or organic grease.
  • the flexion blade is disposed and fixed to the upper surface of the ski, while in another embodiment, it is arranged in the structure of the ski.
  • the blade can extend at the front of the ski between the front contact point and the binding mounting area, but it can also extend much further back.
  • the stirrup being fixed on the ski in front of the binding mounting area, or extending throughout the binding mounting area and serving as their support.
  • the flexible blade can extend at the rear of the ski between the rear contact point and the binding mounting area, or extend forwards much further.
  • the ski according to the invention can have several damping devices.
  • Figures 1 to 6 show a first embodiment.
  • Figure 1 is a side view.
  • Figure 2 is a top view.
  • Figure 3 is a cross section along T1, on a larger scale.
  • Figure 4 is a partial longitudinal section on a larger scale.
  • FIGS. 5 and 6 show in side view how the device works, FIGS. 5a and 6a being partial representations on a larger scale of FIGS. 5 and 6.
  • Figures 7, 8 and 9 are views similar to Figure 1 showing three other embodiments.
  • Figure 10 is a cross-sectional view of a ski whose damping device is embedded.
  • Figure 11 is a view similar to Figure 3 illustrating a variant.
  • Figure 12 is a partial side view showing an alternative embodiment.
  • Figures 13 to 15 are side views illustrating three types of damping devices that have been tested.
  • Figure 16 is a view similar to Figure 1 illustrating a variant.
  • FIG. 17 is a partial view on a large scale of the end of the damping device at the level of the stirrup.
  • Figure 18 is a view similar to Figure 17 illustrating a variant.
  • FIG. 19 is another variant of FIG. 17.
  • FIG. 20 is a perspective view of an element of the device in FIG. 19.
  • the ski (1) comprising the device consists of an elongated beam (100) having its own distribution of thickness, of width and therefore its own stiffness. It comprises a central part (2) also called a mounting area for the bindings (3, 4) intended to retain the boot on the ski, the front binding (3) being commonly called a stop, while the rear binding (4) is called usually heel.
  • the front end (5) of the ski (1) is raised to form the tip (6), while the rear end (7) is also raised to form the heel (8) of the ski.
  • the beam further comprises a lower sliding surface (9) and an upper surface (10). Note that the contact of the lower surface (9) with the snow takes place between the front contact point (11) and the rear contact point (12) corresponding to the places where said lower surface begins to rise.
  • Figures 1 to 6 show a first embodiment according to which the damping device according to the invention consists of a bending blade (13) disposed at the front on the upper surface (10) of the ski (1).
  • said flexion blade is fixed to the ski by a first part constituted by the front end (131) of the blade, while it is connected to it by a second part, by damping means (14 ), of the viscous friction type.
  • the fixing of the first part (131) of the blade on the ski is a fixed, rigid connection, produced for example by screws (16), by gluing or by welding. It should be noted that the blade is flexible in bending and does not generate additional static stiffness (or negligible stiffness compared to the rest of the ski).
  • the second part of the blade (13) is constituted by the rear end (130) movable longitudinally relative to the ski, and which is connected to it by friction means (14) of viscous type.
  • the viscous type friction means (14) are a viscous mobile connection with the ski, arranged on the top of the ski, so that the rear part (130) linked to the ski in a viscous mobile manner is spaced longitudinally at a distance ( D) of the front part (131) rigidly fixed to the ski.
  • the friction and absorption means (14) consist of a sheath or stirrup (145) fixed to the ski by screws (15) comprising a sliding housing (144) for the bending blade, housing filled a viscous material such as silicone type grease.
  • the sheath being constituted by a U-shaped stirrup, fixed to the ski and comprising an upper wall (146) and two side walls (148, 149).
  • the sliding part (130) of the bending blade (13) is in the sheath, completely surrounded by a layer of grease forming a viscous film: an upper layer (140), a lower layer (141) and two side layers (142, 143).
  • the sheath (145) has the general shape of a U open towards the bottom, forming the sliding housing (144) and fixed to the ski by screws (15) in front of the area for mounting the bindings, and in particular the front binding (3), while the front part (131) of the flexion blade (13) is fixed to the ski at the front end of the latter and for example behind its front contact zone (11).
  • the rear end (130) of the flexion blade can thus move longitudinally inside the sheath according to F1 and F2 relative to the body (2) of the ski, as shown in Figures 5, 5a, 6 and 6a .
  • Figures 5, 5a, 6 and 6a schematically show the operation of depreciation.
  • Figure 5 shows the ski in the rest state, and Figure 6, during bending.
  • the rear end has moved rearward along F2 by a relative distance (d) and this movement has been braked by layers of viscous material (140, 141, 142, 143).
  • the bending blade can be longer or shorter and for example be as shown in FIG. 7.
  • the blade (13a) extends backwards, much further than previously, to be retained by the friction means (14a) constituted by a sleeve (145a) extending over the entire mounting area (200) of the two fasteners (3, 4).
  • said sheath (145a) is of the type of that illustrated in the first embodiment.
  • the sleeve (145a) serves, in this embodiment, as a support for the fasteners (3, 4) to which they are fixed, instead of being fixed on the upper surface (10) of the part (100) of the ski proper.
  • the flexion blade (13) it is not necessary for the flexion blade (13) to extend beyond the level of the front attachment (3).
  • the device could be like that illustrated in FIG. 8, which represents another variant according to which the means for retaining the blade (13b) and for damping consist of a sheath (145b) which only extends locally under the front fixing (3).
  • the bending blade (13) is made of aluminum, steel or a composite material, of width (l) between 10 and 45 millimeters, and of thickness (e) from 0.5 to 8 millimeters. It is fixed to the ski between the zone (11) of the front contact point and the binding (3), while the length (L1) of the sheath is between 2% and 100% of the length (L2) of said blade .
  • the thickness of the viscous film can be between 0.1 and 1 millimeter.
  • the damping device according to the invention can be arranged at the rear of the ski as it appears in FIG. 9.
  • the rear end (130) of the blade (13) is fixed to the rear of the ski and extends towards the front so that its front end (131) is linked to the ski movably longitudinally by the friction means (14).
  • Said means being constituted by a sheath (145c) identical to the sheath (145), but disposed under the rear attachment (4), and which serves as its support.
  • the blade (13) can extend forwards beyond the rear attachment (4) and as far as the front attachment (3).
  • the damping device is arranged outside the structure proper of the ski.
  • the skis most often consist of a core (101) covered by one or more upper (102) and lower (103) reinforcing layers.
  • the top of the ski being generally covered by a protective layer (104), while the underside comprises a polyethylene slip layer (105).
  • the damping device is embedded in the ski and an upper plate (106) creates the necessary sliding housing and seals said device by completely isolating it from the outside.
  • the bending blade which, in the proposed embodiments, has a rectangular section, can take any type of shape. It can for example be constituted by a cylindrical rod. In particular, it can be provided that the blade is designed so as to be predisposed to buckling down rather than upwards in order to avoid any blockage of the device.
  • Different solutions are within the reach of those skilled in the art such as that which consists in lowering the position of the neutral fiber of the blade by giving it a form of Omega in its central part for example (not shown).
  • Figure 11 is a view similar to Figure 3 illustrating a variant in which the sleeve (145d) comprises a lower wall (147) parallel to the upper wall (146).
  • Figure 12 illustrates in side view, schematically, another variant in which the lower layer (141) of the viscous material extends beyond the sheath and under the entire blade.
  • the sheath can be fixed to the ski by other means than screws. in fact, it can also be glued or welded.
  • the ski of the invention can have several damping devices, such as for example two devices: one being arranged at the front, as illustrated in FIG. 1 or 8, and the other at the rear , as shown in Figure 9.
  • damping tests were carried out on a 2010 mm ski with in a first case (FIG. 13), a flexion blade (13) of short length (L2) equal to 230 mm, the sheath (145) having a length (L1) of about 100 mm and a width of 29 mm.
  • the contact surface between the two sides of the blade and the sheath constituting the active viscous friction surface is approximately 2 ⁇ (100 ⁇ 29), that is to say approximately 5800 mm 2 (neglecting the friction at the edges of the blade).
  • the fluid used has a viscosity of about 400 poise.
  • the distance (De) from the area fixed to the rear of the ski is 1660 mm.
  • the damping test is carried out on the ski being clamped in its center over a distance (B) of 300 mm; the spatula is loaded with a mass (M) of 20 kilograms-weight which is suddenly released and the damping of the vibrations thus created is measured.
  • the depreciation value obtained in this case is around 3.2% poise.
  • the length (L1) of the sheath (145) is increased compared to the previous case so as to increase the active damping surface.
  • the length (L1) is equal to 930 mm instead of 100 mm.
  • the active surface can be reduced for identical damping values, if provision is made to apply a means exerting pressure on the blade at the level of the sheath, as will be explained below.
  • the length (L2) of the blade can be between 150 and 1,800 millimeters, while the sheath has a damping surface greater than 170 mm 2 .
  • the viscous material can have a viscosity at 40 degrees celcius of between 20 and 1500 poises.
  • the viscosity is around 400 poises.
  • the material is mineral or organic grease.
  • FIG. 16 illustrates another variant according to which the sheath (145e) covers the bending blade (13) over its entire length.
  • the distance (D) is considered to be the distance between points A and B which are respectively the midpoints of the area retained by the sheath and the area attached to the ski.
  • FIG. 17 illustrates a detailed example of a particular embodiment in which the flexion blade (13) slides in the housing (144) of the sleeve (145).
  • the pressure exerted by the viscous film on the blade can be adjusted by means of a pressure member (16) comprising a pad (16a) having a contact surface with the film, a helical spring (16b) which acts directly on the pad in exerting a compressive force and an adjusting screw (16c).
  • the sheath (145) is sealed between the blade and the housing (144) by one or more O-ring (17a, 17b) made of elastomer or by a seal of mastic for example.
  • the pressure member can also be made watertight at the level of the pad (16a) by a seal to prevent any exit of the viscous material from the housing (144).
  • FIG. 18 illustrates a second particular embodiment of the pressure member (16) which is of the pneumatic or hydraulic type. It includes a pad (16a) cooperating with an inflatable bladder (16d) via a valve (16e).
  • the blade comprises over a part of its length at the level of the housing (144) several grooves or grooves (130a) making it possible to accentuate the phenomena of shearing with the viscous material and thus to increase the damping function of the system.
  • FIG. 19 illustrates another particular mode in which the stirrup (145) comprises a pressure member (16) consisting of a piece of prestressed rubber. This part comprises over its length several transverse grooves (16th) allowing a homogeneous deformation of the part.
  • Figure 20 illustrates the part before mounting without prestressing.
  • the stirrup is in the form of a closed housing at the end opposite to the introduction of the blade.

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  • Polyurethanes Or Polyureas (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)
  • Catalysts (AREA)
  • Photovoltaic Devices (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Golf Clubs (AREA)

Claims (23)

  1. Ski, der mit zumindest einer Dämpfungsvorrichtung ausgerüstet ist, die dazu bestimmt ist, die Vibrationen eines Ski zu dämpfen, und die zumindest aus einem Biegungsblatt (13, 13a, 13b, 13c, 13d) gebildet ist, das einen ersten Abschnitt (131, 130), der steif an dem Ski befestigt ist, und einen zweiten Abschnitt (130, 131) aufweist, der auf longitudinal bewegliche Weise durch Dämpfungseinrichtungen (14) verbunden ist, wobei die Dämpfungseinrichtungen (14) vom Typ viskoser Reibung sind und durch zumindest eine Schicht aus einem viskosen Material gebildet sind, das aus mineralischen oder organischen Fetten ausgewählt ist, und wobei der zweite Abschnitt (130, 131), der in Kontakt mit den Dämpfungseinrichtungen ist, gleitend in einem Bügel (145, 145a, 145b, 145c, 145d, 145e) beweglich ist, der mit Ski verbunden ist.
  2. Ski gemäß Anspruch 1, dadurch gekennzeichnet, daß der zweite Abschnitt (130, 131) in der Längsrichtung von dem ersten Abschnitt (131, 130) um einen Abstand (D) beabstandet ist.
  3. Ski gemäß Anspruch 2, dadurch gekennzeichnet, daß der Bügel (145, 145a, 145b, 145c, 145d, 145e) die Form eines "U" hat, wobei eine Aufnahme zum Gleiten in Richtung nach unten offen ist.
  4. Ski gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Bügel (145d) periphere Wände aufweist: eine obere Wand (146), eine untere Wand (147) und zwei seitliche Wände (148, 149).
  5. Ski gemäß irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das viskose Material bei 40°C eine Viskosität aufweist, die zwischen 20 und 1500 Poise beträgt.
  6. Ski gemäß irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Biegungsblatt (13, 13a, 13b, 13c) ein metallisches Blatt aus Aluminium oder aus Stahl ist.
  7. Ski gemäß irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Biegungsblatt (13, 13a, 13b, 13c) aus einem zusammengesetzten Material ist.
  8. Ski gemäß irgendeinem der Ansprüche 6 oder 7, dadurch gekennzeichnet, daß das Biegungsblatt eine Breite (l) aufweist, die zwischen 10 und 45 Millimetern beträgt, eine Dicke (e), die zwischen 0,5 und 8 Millimetern beträgt, und eine Länge (L2), die zwischen 300 und 1800 Millimetern beträgt.
  9. Ski gemäß irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Biegungsblatt (13, 13a, 13b, 13c) auf der oberen Oberfläche (10) des Ski angeordnet und befestigt ist.
  10. Ski, der mit einer Vorrichtung gemäß irgendeinem der Ansprüche 1 bis 8 ausgerüstet ist, dadurch gekennzeichnet, daß das Biegungsblatt (13, 13a, 13b, 13c) in dem Aufbau des Ski angeordnet ist.
  11. Ski gemäß irgendeinem der Ansprüche 9 oder 10, dadurch gekennzeichnet, daß sich das flexible Blatt (13) im vorderen Teil des Ski zwischen dem vorderen Kontaktpunkt (11) und dem Montagehereich (2) für die Bindungen (3, 4) erstreckt.
  12. Ski gemäß irgendeinem der Ansprüche 9, 10 oder 11, dadurch gekennzeichnet, daß sich das flexible Blatt (13) in Richtung nach hinten bis zu dem Montagebereich für die Bindungen erstreckt.
  13. Ski gemäß irgendeinem der Ansprüche 11 oder 12, dadurch gekennzeichnet, daß der vordere Abschnitt (131) des Blattes an dem Ski befestigt ist, während der hintere Abschnitt (130) in dem Bügel (145, 145a) gleitet.
  14. Ski gemäß Anspruch 13, dadurch gekennzeichnet, daß der Bügel auf dem Ski vor dem Montagebereich für die Bindungen befestigt ist.
  15. Ski gemäß Anspruch 13, dadurch gekennzeichnet, daß sich der Bügel in dem gesamten Montagebereich (2) für die Bindungen (3, 4) erstreckt und ihnen als Träger dient.
  16. Ski gemäß irgendeinem der Ansprüche 9 oder 10, dadurch gekennzeichnet, daß sich das flexible Blatt (13) im hinteren Teil des Ski zwischen dem hinteren Kontaktpunkt (12) und dem Montagebereich (2) für die Bindungen (3, 4) erstreckt.
  17. Ski gemäß irgendeinem der Ansprüche 9 oder 10, dadurch gekennzeichnet, daß sich das flexible Blatt (13) in Richtung nach hinten bis zu dem Montagebereich für die Bindungen erstreckt.
  18. Ski gemäß irgendeinem der Ansprüche 9 oder 10, dadurch gekennzeichnet, daß der vordere Abschnitt (131) des Blattes an dem Ski befestigt ist, während der hintere Abschnitt (130) in dem Bügel (145, 145a) gleitet.
  19. Ski gemäß Anspruch 18, dadurch gekennzeichnet, daß der Bügel auf dem Ski vor dem Montagebereich der Bindungen befestigt ist.
  20. Ski gemäß Anspruch 18, dadurch gekennzeichnet, daß sich der Bügel in dem gesamten Montagebereich (2) für die Bindungen (3, 4) erstreckt und ihnen als Träger dient.
  21. Ski gemäß irgendeinem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Bügel eine Druckeinrichtung (16) aufweist, die einstellbar ist oder nicht, und die vom pneumatischen, hydraulischen oder elastischen Typ ist und auf das Blatt wirkt.
  22. Dämpfungsvorrichtung, die dazu bestimmt ist, einen Ski auszurüsten und die zumindest ein Biegungsblatt (13, 13a, 13b, 13c) und einen Bügel (145, 145a, 145b, 145c, 145d, 145e) aufweist, der eine Aufnahme (144) aufweist, in der ein Abschnitt (130, 131) des Biegungsblattes gleitet, und der ein viskoses Material aufweist, das aus mineralischen oder organischen Fetten ausgewählt ist.
  23. Dämpfungsvorrichtung gemäß Anspruch 22, dadurch gekennzeichnet, daß sie dazu bestimmt ist einen Ski gemäß irgendeinem der Ansprüche 1 bis 21 auszurüsten.
EP93100978A 1992-07-31 1993-01-22 Verbesserung an einer Amortisationseinrichtung für Skis Expired - Lifetime EP0580935B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209734A FR2694205B1 (fr) 1992-07-31 1992-07-31 Perfectionnement pour dispositif d'amortissement pour ski.
FR9209734 1992-07-31

Publications (2)

Publication Number Publication Date
EP0580935A1 EP0580935A1 (de) 1994-02-02
EP0580935B1 true EP0580935B1 (de) 1997-03-19

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EP93100978A Expired - Lifetime EP0580935B1 (de) 1992-07-31 1993-01-22 Verbesserung an einer Amortisationseinrichtung für Skis

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US (1) US5441296A (de)
EP (1) EP0580935B1 (de)
JP (1) JPH06154384A (de)
AT (1) ATE150330T1 (de)
DE (2) DE69308949T2 (de)
FR (1) FR2694205B1 (de)

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DE2259375A1 (de) * 1972-12-04 1974-06-12 Heinrich Bellan Verfahren und vorrichtung zur verbesserung der lenkfaehigkeit von schier
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US4577886A (en) * 1984-07-26 1986-03-25 Chernega John O Adjustable flex ski
FR2569117B1 (fr) * 1984-08-17 1986-11-21 Salomon Sa Fixation de securite pour ski, et ski muni d'une telle fixation
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FR2602979B1 (fr) * 1986-08-20 1990-09-21 Salomon Sa Dispositif amortisseur de chocs et vibrations entre un ski et la fixation de la chaussure
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FR2689775B1 (fr) * 1992-04-10 1994-07-08 Salomon Sa Dispositif interface entre un ski et des elements de fixation, notamment de fixation alpine.

Also Published As

Publication number Publication date
FR2694205B1 (fr) 1994-09-23
US5441296A (en) 1995-08-15
ATE150330T1 (de) 1997-04-15
DE69308949D1 (de) 1997-04-24
DE580935T1 (de) 1996-10-10
JPH06154384A (ja) 1994-06-03
EP0580935A1 (de) 1994-02-02
DE69308949T2 (de) 1997-08-28
FR2694205A1 (fr) 1994-02-04

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