EP0813440A1 - Dispositif d'amortissement pour planche de glisse - Google Patents
Dispositif d'amortissement pour planche de glisseInfo
- Publication number
- EP0813440A1 EP0813440A1 EP96939986A EP96939986A EP0813440A1 EP 0813440 A1 EP0813440 A1 EP 0813440A1 EP 96939986 A EP96939986 A EP 96939986A EP 96939986 A EP96939986 A EP 96939986A EP 0813440 A1 EP0813440 A1 EP 0813440A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- ski
- rods
- damping device
- rod
- 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.)
- Granted
Links
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
Definitions
- the invention relates to a damping device for a gliding board, such as an alpine ski, a cross-country ski, a monoski or a snowboard. It also relates to a ski equipped with such a device.
- skis In snow handling, current skis are subjected to more or less prolonged bending or bending stresses causing ski vibrations. These vibrations are for the most part harmful parasitic effects which cause a loss of ski / snow adhesion which impairs driving. and ski stability
- Document FR-A-2 575 393 proposes to have a device of reduced length compared to the carrying length of the ski and its positioning is carried out in the zones which are determined according to the types of vibrations which it is desirable to amortize.
- FR-A-2 673 392 Another more recent solution published in FR-A-2 673 392 consists in taking up the bending forces applied to the ski through a bending blade, one end of which is fixed to the ski and the other end is linked to an interface in viscoelastic material subjected to the shearing of the blade
- the interface can either be connected directly above the ski, or else, connected to the internal face of a shield or a protective cover
- One of the main advantages of such a construction is to obtain satisfactory damping of vibrations by using a system whose overall height on the ski is reduced to a minimum.
- the damping effect is accompanied by dynamic stiffening of the ski, function of the length of the bending blade and of the shear resistance opposite to one free end of the ski
- the static stiffness of the ski is not affected by the arrangement of such a system since no prestressing is opposed at the free end by the damping means which operates in shear
- the torsional stresses or vibrational phenomena of the ski appear either when passing reliefs, or more frequently when taking a turn when the downstream ski places a strong pressure on the inner edge. It can thus be observed that the torsional stresses are maximum on the external areas of the ski and are mainly oriented at 45 ° relative to the longitudinal axis. In addition, the stresses are variable along the ski and increase towards each of the ends in tip and heel. Skis wider than normal, like powder skis, are subject to more torsional stress at the ends; and there are no devices making it possible to absorb stresses effectively.
- the object of the present invention is therefore to propose a device which dampens both the flexural deformations and the torsional deformations of the parts of the gliding board most exposed to these phenomena.
- the invention relates to a damping device for a gliding board.
- the device includes:
- At least one housing intended to be rigidly connected to the board at a certain distance from the fixed connection means; which has an opening for the introduction of a reentrant portion of each rod, and a housing containing a viscoelastic material in contact with the longitudinal sliding surface over a certain length at least of the reentrant portion of each rod; said material being subjected to shear during the movement of each portion of rod in the housing.
- the two rods are oriented relative to each other in a substantially parallel manner.
- the invention also relates to a ski, in particular of the alpine type, comprising the damping device.
- the transmission rods are oriented substantially in the longitudinal direction; each being offset on either side of the vertical median plane P. The more the rods are offset laterally with respect to this plane, the more effective the torsional damping effect is.
- the device is particularly sensitive to bending deformations of the elongated beam that constitutes the ski, as well as to torsional deformations thereof.
- the device is also particularly suitable for powder skis, with a front and rear width larger than normal.
- the ski comprises a first device situated between the tip region and the binding mounting zone and a second device situated between the binding mounting zone and the heel zone. It is in these places, in fact, that the deformations are maximum while it is necessary to improve the contact between the ski and the snow.
- Figure 1 is an elevational view of a ski on which are mounted two devices according to the invention.
- Figure 2 is an enlarged view of a detail of Figure 1.
- Figure 3 is a section on III-III of Figure 1.
- Figure 4 is a section on IV-IV of Figure 1.
- Figure 5 is a section along V-V of Figure 1.
- FIG. 6 is a section on VI-VI of FIG. 3.
- Figure 7 is a section on VII-VII of Figure 5.
- Figures 8 and 9 are schematic views of the principle of operation of the device in torsion.
- Figure 10 is a schematic view of the operating principle of the device in bending.
- Figure 11 is a sectional view similar to the view of Figure 3 according to a variant.
- Figure 12 is a sectional view similar to the view of Figure 3 according to another variant.
- FIG. 13 is an elevation view of the front of the ski according to the variant of FIG. 12.
- Figure 14 is a view similar to Figure 13 according to another variant.
- Figure 15 is a view similar to Figure 4 according to another variant.
- Figure 16 is a view similar to Figure 1 according to another alternative embodiment.
- Figure 17 is a partial schematic section along line XVII-XVII of Figure 16.
- FIG. 1 represents a ski 1 in particular an alpine ski constituted by an elongated beam having its own distribution of thickness, of width and therefore its own stiffness. It includes a central part or mounting area 10 intended for mounting the fastening elements (dotted line), a tip area 11 located at the front of the ski, a heel area 12 located at the back of the ski.
- a first device 2 according to the invention is located on the upper surface of the ski between the mounting area 10 and the tip region 11.
- a second device 3 is located on the upper surface between said area 10 and the area of heel 12.
- the damping device 2 comprises two transmission rods 20, 21 substantially parallel to one another and located on either side of the vertical median plane P. These rods are spaced apart from one another laterally; that is to say in a direction perpendicular to the longitudinal direction given by the median vertical plane P.
- Each rod 20, 21 comprises a first end 20a, 21a connected to a fixed connection means 22 which firmly holds these ends on the ski without possibility of movement.
- the second ends 20b, 21b of the rods are in turn connected to the ski by a flexible connection means which comprises a housing 23 rigidly connected to the ski. Between the means 22 and the housing 23, over the distance D shown, the rods are perfectly free and have no connection with the ski.
- a means for guiding the longitudinal displacements for example, to avoid a possible problem of buckling of the rods which may occur during an exceptional bending deformation (not shown).
- the housing 23 includes openings 231a, 231b to allow the introduction of the respective second ends 20b, 21b of the rods in the housing. These openings must be provided sufficient to allow free sliding in translation and in rotation.
- a recess 230 Inside the housing is formed a recess 230 whose volume must also be provided sufficient, in particular in depth, to allow free movement in translation of each rod. It is particularly important, in fact, that the free end 20b, 21b of each rod cannot come into abutment against the bottom 230a of the housing of the housing in order to avoid any stiffening of the ski from a certain arrow (FIG. 6).
- the volume of the recess 230 is partially filled with a damping block of viscoelastic material 25.
- the material will be advantageously chosen from the family of mineral or organic sealants. In this case, the material is sticky enough to adhere to the elements with which it comes into contact, thereby undergoing significant shearing during the translational or rotational movement of the ends 21a, 21b in the recess of the housing.
- the damping block 25 comes into contact with the tubular sliding surface over a certain length 1 of the re-entrant portion or end 20a, 20b of each rod.
- the fixed connecting means 22, meanwhile, is in the form of a second housing intended to be connected to the ski by any means, such as by gluing, welding or screwing and into which the first ends 20a, 21a of the rods 20, 21. These ends 20a, 21a are rigidly connected to the second housing 23 by means of a layer of adhesive 220, for example (FIG. 7).
- Each rod 20, 21 is preferably made of a high modulus material based on glass fibers, carbon, acrylic or polyester or a mixture of such fibers.
- the plastic material containing these fibers can be a thermosetting resin, preferably of the epoxy type or a thermoplastic resin.
- the advantage of using a composite material rather than a metal comes from the low thermal expansion of the composite compared to the metal and from its lightness.
- one of the disadvantages of the composite is its low resistance to crushing and impact. It is therefore necessary to protect each rod with an external sheath 4 of flexible plastic material.
- the sheath must extend over the distance D between the fixed connection means 22 and the housing 23.
- such a sheath is made of polyamide, polyurethane or of extruded ionomer.
- rods and their sheath have a constant section over the entire length.
- the external diameter of the tubes is between 4 to 8 mm, preferably between 5 and 6 mm.
- Figures 8 and 9 illustrate the operating principle of the device on a ski when a pure torsional deformation occurs in the region covered by the device.
- FIG. 10 illustrates the operating principle of the device in pure bending.
- a bending force F is applied in the direction indicated at the location of the device, for example, during a violent impact from the front of the ski shown with the ground, there is a relative displacement of each free end 20b , 21b of the rods in the direction of the housing 23 (in the direction of the arrow d).
- This movement is thus braked by the damping block 25.
- the braking and therefore the damping are of course done as well in the opposite relative movements; that is to say in a direction opposite to d, during the movements of return to the initial position and against the arrow; that is to say in the opposite direction to F.
- the displacements generated are a function of the length of the rods and of their offset relative to the neutral fiber of the ski and also of the lateral offset of the rods relative to the vertical median plane P of the ski.
- FIG 11 shows a variant of the invention in which the housing 23 comprises two separate recesses 230b, 230c each receiving the end 20b, 21b of the rods.
- Each housing is provided with a separate damping block 25a, 25b.
- This embodiment has the advantage compared to the previous one of having a material constituting the block 25a with different characteristics compared to the material of the block 25b (hardness, elasticity, viscosity, tangent of summer). It is thus possible to adapt the damping on the side of the inner edge of the ski, where the supports are stronger, in a differential and specific manner relative to the side of the outer edge of the ski where the supports are weaker.
- Figure 12 shows another variant where the device comprises two separate housings 23a, 23b each provided with a separate recess.
- the rods 20, 21 are not necessarily parallel but can be divergent towards the ends of the ski, as shown by way of example in FIG. 13 on the front part of the ski.
- the device can advantageously comprise two separate boxes 23a, 23b spaced laterally from one another over the width of the front of the ski, as well as two fixed and separate connecting means 22.
- the rods do not necessarily have the same length but can, on the contrary, be of different length as required as shown in FIG. 14 so as to influence in a differential manner the supports on the internal side and on the external side of the ski.
- the rods 20, 21 may have a non-circular shape, such as a flattened, substantially semi-circular shape shown in FIG. 15. Such a shape contributes to lowering the neutral fiber of the section of the rod so that it better resists buckling in bending.
- FIGS. 16 and 17 Another alternative embodiment shown using FIGS. 16 and 17 uses three housings and three rods.
- the ski 1 comprises a device 3, a mounting area 10, a tip area 11 and a heel 12 as already described.
- a device 40 is located between the area of mounting 10 and the spatula area 11.
- the device 40 comprises a front housing 41, a central housing 42 and a rear housing 43
- a rod 44 connects the front housing 41 to the central housing 42, and two rods 45, 46 connect the central housing 42 to the back box 43
- the device 40 operates as follows, explained with the aid of FIG. 17
- the rod 44 is fixed at one end to the housing 41 in a fixed manner, for example by gluing or screwing into an orifice of the housing 41
- the other end of the rod 44 is guided in an open cavity of the central housing 42 by a block of damping 47 disposed between the rod 44 and the walls of the cavity
- a space 48 in the cavity allows displacement of the rod 44 in the cavity without the end of the rod 44 touching the bottom of the cavity when ski 1 deforms
- rods 45, 46 each have one end fixedly secured to the rear housing 43, and one end movable relative to the housing 42
- the section of Figure 17 shows one end of the rod 45 secured in an opening of the housing 43, and the other end of the rod 45 able to move in a cavity of the housing 42 by friction on a damping block 49 Good heard, a recess 50 of the cavity of the housing 42 prevents at one end of the rod 45 from touching the bottom of the cavity when the ski 1 deforms
- the rod 46 not visible in FIG. 17 is connected by its ends to the housings 42 and 43 in a similar manner to the connection of the rod 45 with the same housings 42 and 43
- This variant of embodiment of the invention makes it possible to manage, at selected locations of ski 1, flexural deformations and torsional deformations.
- the rod 44 more specifically controls deformations in bending, while the rods 45 and 46 control both bending and torsional deformations.
Landscapes
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
- Machine Tool Units (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Advancing Webs (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9515108 | 1995-12-04 | ||
FR9515108A FR2741814B1 (fr) | 1995-12-04 | 1995-12-04 | Dispositif d'amortissement pour planche de glisse |
PCT/FR1996/001876 WO1997020604A1 (fr) | 1995-12-04 | 1996-11-27 | Dispositif d'amortissement pour planche de glisse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0813440A1 true EP0813440A1 (fr) | 1997-12-29 |
EP0813440B1 EP0813440B1 (fr) | 2001-12-05 |
Family
ID=9485693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96939986A Expired - Lifetime EP0813440B1 (fr) | 1995-12-04 | 1996-11-27 | Dispositif d'amortissement pour planche de glisse |
Country Status (6)
Country | Link |
---|---|
US (1) | US6182998B1 (fr) |
EP (1) | EP0813440B1 (fr) |
AT (1) | ATE209944T1 (fr) |
DE (1) | DE69617649T2 (fr) |
FR (1) | FR2741814B1 (fr) |
WO (1) | WO1997020604A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2801801A1 (fr) | 1999-12-06 | 2001-06-08 | Salomon Sa | Dispositif amortisseur des vibrations d'un ski, et ski equipe d'un tel dispositif |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2802438B1 (fr) * | 1999-12-21 | 2002-05-31 | Rossignol Sa | Planche de glisse |
FR2804336B1 (fr) * | 2000-02-02 | 2002-03-08 | Rossignol Sa | Ski alpin |
DE60119961T2 (de) * | 2000-11-17 | 2006-12-21 | Scott Sports S.A. | Ski und snowboard mit veränderlicher radialer geometrie |
DE10204330A1 (de) * | 2002-02-01 | 2003-08-14 | Innotec Ges Zur Entwicklung In | Alpinski |
DE10236152A1 (de) * | 2002-08-07 | 2004-02-19 | Marker Deutschland Gmbh | Ski- und Skibindungs-Kombination |
GR1004144B (el) * | 2002-08-16 | 2003-02-12 | Μαρκος Παναγιωτη Χατζηκυριακακης | Συστημα εκμηδενισης της στρεβλωσης και ελεγχου της ελαστικοτητας χιονοσανιδας |
US6857653B2 (en) | 2002-10-31 | 2005-02-22 | Anton F. Wilson | Gliding skis |
DE10254063A1 (de) * | 2002-11-19 | 2004-06-03 | InnoTec Ges. zur Entwicklung innovativer Technologien Uwe Emig, Prof. Reinhold Geilsdörfer, Markus Gramlich GbR | Alpinski |
US7073810B2 (en) * | 2003-06-25 | 2006-07-11 | Wilson Anton F | Ski with tunnel and enhanced edges |
US7607679B2 (en) * | 2004-11-23 | 2009-10-27 | Anton F. Wilson | Suspension system for a ski |
JP2008520379A (ja) * | 2004-11-23 | 2008-06-19 | エフ. ウィルソン,アントン | サスペンション付きスキー板 |
WO2006088908A2 (fr) * | 2005-02-16 | 2006-08-24 | Wilson Anton F | Snowboards |
DE102005054985A1 (de) * | 2005-11-16 | 2007-05-24 | Marker Völkl International GmbH | Schneegleitbrett sowie Schalenbauteil für ein Schneegleitbrett |
FR2895914B1 (fr) * | 2006-01-09 | 2008-07-04 | Skis Rossignol Sas Soc Par Act | Perfectionnement pour planche de glisse sur neige |
DE102006002669B4 (de) * | 2006-01-19 | 2010-04-01 | Dr. Mirtsch Gmbh | Mehrdimensional strukturiertes Gleit- und Rollbrett |
US7690674B2 (en) * | 2006-08-10 | 2010-04-06 | Armada Skis, Inc. | Snow riding implement |
FR2926735B1 (fr) * | 2008-01-25 | 2010-03-26 | Salomon Sa | Ski alpin avec moyens de reglage |
FR2941627B1 (fr) * | 2009-01-30 | 2012-12-14 | Salomon Sas | Ski comportant un moyen d'amortissement des vibrations |
US9305120B2 (en) | 2011-04-29 | 2016-04-05 | Bryan Marc Failing | Sports board configuration |
US9950242B2 (en) * | 2015-06-19 | 2018-04-24 | Anton F. Wilson | Automatically adaptive ski |
FR3041267B1 (fr) * | 2015-09-21 | 2019-05-24 | Skis Rossignol | Dispositif amortisseur destine a etre monte sur une planche de glisse sur neige |
US9993716B1 (en) | 2017-10-27 | 2018-06-12 | Barry Lyn Holtzman | Ski oscillation damping apparatus |
US20240424382A1 (en) * | 2021-09-08 | 2024-12-26 | Socpra Sciences Et Genie S.E.C. | A ski having a stabilizing section, a pair of skis and a stabilization device |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1526418A (fr) * | 1967-05-19 | 1968-05-24 | Ski comportant des profilés de renforcement susceptibles d'être tournés et d'une flexibilité réglable | |
US3537717A (en) * | 1968-11-29 | 1970-11-03 | Minnesota Mining & Mfg | Damped ski and method of making |
FR2575393A1 (fr) | 1984-12-27 | 1986-07-04 | Rossignol Sa | Ski de neige |
US4679813A (en) * | 1986-04-10 | 1987-07-14 | Girard Donald A | Ski stiff in torsion |
US4824926A (en) * | 1987-12-16 | 1989-04-25 | Ppg Industries, Inc. | Bilayer windshield with an abrasion and solvent resistant polyurethane protective coating |
US5265911A (en) * | 1989-01-12 | 1993-11-30 | Goode David P | Composite ski pole and method of making same |
FR2665081B1 (fr) | 1990-07-30 | 1992-11-06 | Rossignol Sa | Surf de neige a caracteristiques asymetriques. |
FR2675392B1 (fr) | 1991-04-22 | 1995-06-23 | Salomon Sa | Dispositif d'amortissement pour ski. |
FR2678517B1 (fr) * | 1991-07-04 | 1993-10-15 | Salomon Sa | Perfectionnement pour dispositif d'amortissement pour ski. |
US5284357A (en) * | 1991-11-01 | 1994-02-08 | Tinkler Michael R | Apparatus and method for damping deflections and vibrations in skis |
FR2688410B1 (fr) * | 1992-03-10 | 1994-05-06 | Rossignol Sa Skis | Dispositif pour le montage sur un ski d'une fixation de securite, comprenant une butee et une talonniere independantes l'une de l'autre. |
DE4214383C2 (de) * | 1992-04-30 | 1996-08-14 | Inventa Ag | Koextrudiertes Mehrschicht-Polymer-Rohr |
US5556677A (en) * | 1994-01-07 | 1996-09-17 | Composite Development Corporation | Composite shaft structure and manufacture |
FR2709072B1 (fr) * | 1993-08-20 | 1995-10-27 | Salomon Sa | Ski perfectionné muni de transmetteurs élastiques de longueur variable de part et d'autre de la zone de fixation. |
FR2709071B1 (fr) * | 1993-08-20 | 1995-10-27 | Salomon Sa | Ski perfectionné muni de dispositifs élastiques pour s'opposer et/ou amortir les sollicitations en flexion. |
FR2720007B1 (fr) | 1994-05-18 | 1996-07-12 | Salomon Sa | Ski alpin muni d'un dispositif de raidissement et/ou d'amortissement à double effet. |
FR2729865B1 (fr) | 1995-01-27 | 1997-04-04 | Salomon Sa | Paire de skis munis de dispositifs d'amortissement asymetriques de torsion |
-
1995
- 1995-12-04 FR FR9515108A patent/FR2741814B1/fr not_active Expired - Fee Related
-
1996
- 1996-11-27 WO PCT/FR1996/001876 patent/WO1997020604A1/fr active IP Right Grant
- 1996-11-27 AT AT96939986T patent/ATE209944T1/de active
- 1996-11-27 EP EP96939986A patent/EP0813440B1/fr not_active Expired - Lifetime
- 1996-11-27 US US08/875,497 patent/US6182998B1/en not_active Expired - Fee Related
- 1996-11-27 DE DE69617649T patent/DE69617649T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9720604A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2801801A1 (fr) | 1999-12-06 | 2001-06-08 | Salomon Sa | Dispositif amortisseur des vibrations d'un ski, et ski equipe d'un tel dispositif |
Also Published As
Publication number | Publication date |
---|---|
WO1997020604A1 (fr) | 1997-06-12 |
ATE209944T1 (de) | 2001-12-15 |
FR2741814A1 (fr) | 1997-06-06 |
EP0813440B1 (fr) | 2001-12-05 |
FR2741814B1 (fr) | 1998-02-13 |
DE69617649D1 (de) | 2002-01-17 |
DE69617649T2 (de) | 2002-08-08 |
US6182998B1 (en) | 2001-02-06 |
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