EP0806228B1 - Ski - Google Patents
Ski Download PDFInfo
- Publication number
- EP0806228B1 EP0806228B1 EP97420072A EP97420072A EP0806228B1 EP 0806228 B1 EP0806228 B1 EP 0806228B1 EP 97420072 A EP97420072 A EP 97420072A EP 97420072 A EP97420072 A EP 97420072A EP 0806228 B1 EP0806228 B1 EP 0806228B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ski
- zone
- thickness
- upper element
- length
- 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.)
- Expired - Lifetime
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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
- A63C5/04—Structure of the surface thereof
- A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
Definitions
- the invention relates to the field of alpine skiing and cross-country skiing. She aims more particularly an improved geometry in which the variation thickness of the ski over its length gives very good sliding properties important.
- a ski can be compared to a beam or a board slightly curved longitudinally to form the camber of the ski, with a part front raised to form the tip and a rear part also slightly raised to form the heel.
- the ski being laid flat on the snow, and under the effect of the skier's load, the bottom surface or sole remains in contact with the snow from the front contact line to the rear contact line.
- the distance between Front and rear contact lines determine the "bearing length" of the ski.
- this beam is precisely determined to give the ski the desired behavior, particularly in bending and torsion.
- the beam or the board has a certain flexibility which allows it to fit the shape of the terrain.
- the flexibility characteristics largely result from the variation in thickness of the board between the front and rear contact lines.
- the thickness of the ski increases continuously from the line front contact to the skate area in which it is maximum. This thickness then decreases continuously up to the rear contact line.
- Such a geometry is for example described in patent FR 2 700 476 in the case of a ski background.
- This thickness distribution is generally combined with a variation of width of the ski according to its length, to give it a behavior specific.
- the pressure exerted on the snow for a ski is maximum at the level of the skate, near the skier's foot, then decreases gradually until it disappears near the ends.
- This pressure distribution curve is mainly related to the variation in thickness along the ski.
- the overpressure area of the shoe has a negative influence on the sliding characteristics of the board.
- the problem which the invention therefore proposes to solve is to increase notoriously the sliding characteristics of a ski without modifying its dynamic behavior.
- the invention therefore relates to a ski intended for the practice of alpine skiing or cross-country skiing, formed of a body and the sole of which has a bearing surface of length Lp delimited at the front and at the rear by the lines of contact respectively before A 'and rear D', and whose thickness is E A at the level of the front contact line A 'and E D at the level of the rear contact line D'.
- the invention consists in giving the ski a constant thickness in its central part, to ensure a uniform distribution of the pressure exerted on snow.
- zones located in front and behind the characteristic intermediate zone are decreasing in thickness to the contact lines.
- a ski according to the invention has in its central area an upper face parallel to the sole.
- the invention is not limited to skiing in which the thickness of the intermediate zone is strictly constant, but also covers achievements in which this thickness is substantially constant.
- substantially constant we mean that the maximum difference in thickness on two points of this intermediate zone is at most equal to five percent (5%) of the total thickness.
- the invention relates to narrow skis used for cross-country skiing cross-country or for alpine skiing, on which the user's foot is positioned according to the longitudinal axis.
- the thickness of the ski decreases from the characteristic intermediate zone up to the front and rear contact lines.
- the intermediate zone Z BC is constituted by a monobloc part of the beam.
- the intermediate zone Z BC is constituted by the superposition of a part of the beam and of an upper element surmounting it.
- the upper face of the ski receives in the intermediate zone features a rigid plate which ensures uniform transmission over its entire length of the weight and impulses generated by the skier, so that the distribution of the pressure exerted on the snow is as uniform as possible on the entire length of the characteristic intermediate zone.
- the entire length of the element upper is glued on the beam.
- the central part of the element upper is glued on the beam and the front and rear end parts of the reinforcing element are connected to the beam by strips of viscoelastic material. This reduces stress at the ends of the element and benefit from shear damping phenomena viscoelastic bands.
- the front and rear end portions of this upper element can have vertical sections, corresponding to a thickness step.
- These parts extremals may also have inclined sides in the direction of the lines contact respectively front and rear, so as to ensure a variation of continuous thickness and without breakage.
- the upper element can take different forms which prove to be interesting, either to manufacture or under the conditions of use.
- the extreme front and rear parts of the upper element has inclined sides in the direction of the contact lines front A 'and rear D' respectively.
- the upper element is presented in top view under a general rectangular shape.
- the front and rear end portions of the upper element conforms to a V shape, the point of which is directed towards the exterior of the top element.
- the front and rear end parts of the upper element form in view from above, two non-parallel lines.
- the beam and the upper element can either be of constant thickness, or be of complementary shapes of so that the thickness of the assembly is of constant thickness.
- the upper beam and element can be convex or concave.
- Figure 1 is a side view of a ski according to the invention, in which the proportions have been exaggeratedly modified to allow good understanding of the dimensional criteria characteristic of the invention.
- Figure 2 is a side view of a ski according to an alternative embodiment.
- Figure 3 is a side view of a detail of the zone linking zone intermediates and before characteristics of the invention.
- FIG. 4 is an alternative embodiment of FIG. 3.
- Figures 5 to 7 are top views of skis having elements superior characteristics according to three variants of form.
- FIG. 8 is a detail side view of the intermediate zone of a ski equipped with an upper element connected to the upper face of the ski partly by strips of viscoelastic material.
- the invention relates to a ski, cross-country or downhill, which has a characteristic thickness variation along its length.
- a ski (1) mainly consists of a beam (2) of which the underside (3) forms the sole.
- the thickness of the ski at the contact lines is less than the thickness measured in the bearing surface.
- the thicknesses at the front (A ') and rear (D') contact lines are denoted E A and E D respectively .
- the bearing surface breaks down into three contiguous zones, namely: a central zone Z BC surrounded by two zones respectively before Z AB and Z CD .
- the central zone Z BC extends over at least fifty percent (50%) of the length Lp of the bearing zone, and has a substantially constant thickness E.
- the difference maximum between the thicknesses measured at two points in this central zone ZBC is at most equal to five percent (5%) and preferably less than one percent (1%) of the total thickness E, while this difference is greater 25% and 10% respectively on a cross-country ski and an alpine ski in accordance with Prior Art.
- the variation in thickness on the zones before Z AB and Z CD also meets precise criteria.
- the quotient of the difference in thickness by the length is between 0.01 and 0.1, that is to say: 0.01 ⁇ E - E A / L AB ⁇ 0.1
- the intermediate zone Z CD may have a length greater than 630 mm and more favorably 800 millimeters.
- the thickness E of this same area must be between 15 and 35 millimeters, while the thickness E A , E D at the front and rear contact lines can vary at the same time between 4 and 12 millimeters .
- the area intermediate of constant thickness can be constituted either by a portion itself of the beam (2), or be formed of the association of the beam and an element upper (10) disposed on the upper face (6) of the ski.
- the intermediate zone Z BC is in one piece, it may or may not be seen there as a break in curvature at the points B and C constituting the limits of the intermediate zone, or else ensuring a smooth transition easier to manufacture.
- the upper element may have ends (11, 12) of various geometries. So we can consider giving this end (11) a form of vertical pan (13) or else a form bevelled (14) ensuring a gradual thickness variation over a short range of transition.
- the upper element (10) has a substantially rectangular in shape, and the end portions (11, 12) terminate by straight segments (16, 17), mutually parallel and perpendicular to the median longitudinal plane of the ski.
- the extreme parts (11, 12) of the upper element (10) follow chevron shapes (18, 19) oriented by the ends of the ski. This allows the effect of pressure distributor of the upper element (10).
- the ends (11, 12) of the element upper (10) follows the shapes of straight segments (20, 21) which, the converging extensions, on one side of the ski, substantially at the level of the length median of the upper element (10). This creates an asymmetry between the skis left and right.
- the upper element (10) can be connected to the upper face (6) of the ski by gluing or other equivalent means, as illustrated only in its middle part.
- the front and rear parts of the reinforcing element (10) are connected to the upper face (6) of the ski by strips of viscoelastic materials (25, 26), which allows a uniform distribution of pressure while ensuring a damping effect by shearing of the viscoelastic material.
Description
- la surface portante se décompose en trois zones contiguës à savoir :
- une zone centrale ZBC d'épaisseur E sensiblement constante et dont la longueur LBC est supérieure à cinquante pourcent (50%) de la longueur Lp de la surface portante;
- deux zones avant ZAB et arrière ZCD d'épaisseur variable, localisées respectivement en avant et en arrière de la zone centrale ZBC, et de longueurs LAB et LCD,
- en ce que le quotient E - EA / LAB de la différence d'épaisseur (E-EA) du ski entre les points extrêmes (A,B) de la zone avant ZAB, divisée par la longueur (LAB) de la même zone est compris entre zéro virgule zéro un (0,01) et zéro virgule un (0,1);
- et en ce que le quotient E - ED / LCD de la différence d'épaisseur (E-ED) du ski entre les points extrêmes (C,D) de la zone arrière, divisée par la longueur (LCD) de la même zone est compris entre zéro virgule zéro un (0,01) et zéro virgule un (0,1).
Autrement dit, 0,03 ≤ E - EA / LAB ≤0,09 et 0,03 ≤ E - ED / LCD ≤0,09
Claims (17)
- Ski (1) destiné à la pratique du ski alpin ou du ski de fond, formé d'un corps (2) et dont la semelle (3) présente une surface portante de longueur Lp délimitée à l'avant et à l'arrière par les lignes de contact respectivement avant A' et arrière D', et dont l'épaisseur est de EA au niveau de la ligne de contact avant A' et de ED au niveau de la ligne de contact arrière D', caractérisé en ce quela surface portante se décompose en trois zones contiguës à savoir:une zone centrale ZBC d'épaisseur E sensiblement constante et dont la longueur LBC est supérieure à cinquante pourcent (50 %) de la longueur Lp de la surface portante;deux zones avant ZAB et arrière ZCD d'épaisseur variable, localisées respectivement en avant et en arrière de la zone centrale ZBC et de longueurs LAB et LCD,en ce que le quotient E - EA / LAB de la différence d'épaisseur (E-EA) du ski entre les points extrêmes (A,B) de la zone avant, divisée par la longueur (LAB) de la même zone est compris entre zéro virgule zéro un (0,01) et zéro virgule un (0,1).et en ce que le quotient E - ED / LCD de la différence d'épaisseur (E-ED) du ski entre les points extrêmes (C,D) de la zone arrière, divisée par la longueur (LCD) de la même zone est compris entre zéro virgule zéro un (0,01) et zéro virgule un (0,1).
- Ski selon la revendication 1, caractérisé en ce que la longueur LBC de la zone intermédiaire ZBC est comprise entre six cents milllimètres (600 mm) et 900 millimètres (900 mm).
- Ski selon la revendication 1, caractérisé en ce qu'il est destiné à la pratique du ski de fond, et en ce que l'épaisseur E de la zone intermédiaire ZBC est comprise entre vingt deux millimètres (22 mm) et trente cinq millimètres (35 mm).
- Ski selon la revendication 1, caractérisé en ce qu'il est destiné à la pratique du ski alpin, et en ce que l'épaisseur E de la zone intermédiaire ZBC est comprise entre quinze millimètres (15 mm) et trente millimètres (30 mm).
- Ski selon la revendication 1, caractérisé en ce qu'il est destiné à la pratique du ski de fond, et en ce que le quotient de la différence d'épaisseur (E-EA; E-ED) du ski entre les points extrêmes (A,B;C,D) de chaque zone avant ZAB et arrière ZCD, divisée par la longueur (LAB ; LCD) de la même zone est compris entre zéro virgule zéro trois (0,03) et zéro virgule zéro neuf (0,09).
- Ski selon la revendication 1, caractérisé en ce qu'il est destiné à la pratique du ski alpin, et en ce que le quotient de la différence d'épaisseur (E-EA; E-ED) du ski entre les points extrêmes (A,B;C,D) de chaque zone avant ZAB et arrière ZCD, divisée par la longueur (LAB ; LCD) de la même zone est compris entre zéro virgule zéro un (0,01) et zéro virgule zéro trois (0,03).
- Ski selon l'une des revendications 1 à 6, caractérisé en ce que la zone intermédiaire ZBC est constituée par une partie monobloc de la poutre (3).
- Ski selon l'une des revendications 1 à 6, caractérisé en ce que la zone intermédiaire ZBC est constituée par la superposition d'une partie de la poutre (3) et d'un élément supérieur (10) la surmontant.
- Ski selon la revendication 8, caractérisé en ce que toute la longueur de l'élément supérieur (10) est collée sur la poutre (3).
- Ski selon la revendication 8, caractérisé en ce que la partie centrale de l'élément supérieur (10) est collée sur la poutre (3) et en ce que les parties extrêmales avant et arrière (11,12) de l'élément supérieur (10) sont reliées à la poutre (3) par des bandes (25,26) en matériau visco-élastique.
- Ski selon la revendication 8, caractérisé en ce que les parties extrêmales avant et arrière (11,12) de l'élément supérieur (10) présentent des pans verticaux (13).
- Ski selon la revendication 8, caractérisé en ce que les parties extrêmales avant et arrière (11,12) de l'élément supérieur(10) présentent des pans (14) inclinés en direction des lignes de contact respectivement avant A' et arrière D'.
- Ski selon la revendication 8, caractérisé en ce que les parties extrêmales avant et arrière (11,12) de l'élément supérieur (10) sont formées par des segments (16,17) rectilignes, parallèles et perpendiculaires au plan médian longitudinal du ski.
- Ski selon la revendication 8, caractérisé en ce que les parties extrêmales avant et arrière (11,12) de l'élément supérieur (10) épousent une forme de V dont la pointe (18,19) est dirigée vers l'extérieur de l'élément supérieur (10).
- Ski selon la revendication 8, caractérisé en ce que les parties extrêmales avant et arrière de l'élément supérieur forment en vue de dessus, deux lignes non parallèles.
- Ski selon la revendication 8, caractérisé en ce que la poutre et l'élément supérieur sont tous deux d'épaisseur constante.
- Ski selon la revendication 8, caractérisé en ce que la poutre et l'élément supérieur sont de formes complémentaires de sorte que l'épaisseur de l'ensemble est constante.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9605945A FR2748398B1 (fr) | 1996-05-07 | 1996-05-07 | Planche de glisse |
FR9605945 | 1996-05-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0806228A1 EP0806228A1 (fr) | 1997-11-12 |
EP0806228B1 true EP0806228B1 (fr) | 2001-11-21 |
Family
ID=9492092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97420072A Expired - Lifetime EP0806228B1 (fr) | 1996-05-07 | 1997-05-05 | Ski |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0806228B1 (fr) |
AT (1) | ATE209060T1 (fr) |
DE (1) | DE69708377T2 (fr) |
FR (1) | FR2748398B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007006806A1 (de) | 2007-02-07 | 2008-08-14 | Mauser-Werke Oberndorf Maschinenbau Gmbh | Bruchtrennverfahren |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3084596B1 (fr) * | 2018-08-01 | 2020-07-10 | Skis Rossignol | Ski alpin |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2623095B1 (fr) * | 1987-11-18 | 1990-03-30 | Salomon Sa | Dispositif de guidage lateral d'une chaussure sur un ski de fond |
AT400524B (de) * | 1988-10-10 | 1996-01-25 | Atomic Austria Gmbh | Schi |
EP0490044A1 (fr) * | 1990-12-14 | 1992-06-17 | Salomon S.A. | Ski pour sport d'hiver comprenant un raidisseur et une embase |
FR2686520B1 (fr) * | 1992-01-28 | 1994-04-15 | Salomon Sa | Perfectionnement pour ski comprenant une plateforme centrale en saillie. |
FR2704155B1 (fr) * | 1993-04-20 | 1995-07-07 | Salomon Sa | Surf des neiges a plateforme en materiau a faible module et inserts locaux. |
-
1996
- 1996-05-07 FR FR9605945A patent/FR2748398B1/fr not_active Expired - Fee Related
-
1997
- 1997-05-05 DE DE69708377T patent/DE69708377T2/de not_active Expired - Fee Related
- 1997-05-05 EP EP97420072A patent/EP0806228B1/fr not_active Expired - Lifetime
- 1997-05-05 AT AT97420072T patent/ATE209060T1/de not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007006806A1 (de) | 2007-02-07 | 2008-08-14 | Mauser-Werke Oberndorf Maschinenbau Gmbh | Bruchtrennverfahren |
Also Published As
Publication number | Publication date |
---|---|
EP0806228A1 (fr) | 1997-11-12 |
ATE209060T1 (de) | 2001-12-15 |
DE69708377T2 (de) | 2002-08-14 |
FR2748398B1 (fr) | 1998-06-12 |
FR2748398A1 (fr) | 1997-11-14 |
DE69708377D1 (de) | 2002-01-03 |
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