EP0661086B1 - Ski - Google Patents
Ski Download PDFInfo
- Publication number
- EP0661086B1 EP0661086B1 EP94420325A EP94420325A EP0661086B1 EP 0661086 B1 EP0661086 B1 EP 0661086B1 EP 94420325 A EP94420325 A EP 94420325A EP 94420325 A EP94420325 A EP 94420325A EP 0661086 B1 EP0661086 B1 EP 0661086B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ski
- plane
- sole
- heel
- reinforcement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
- A63C5/04—Structure of the surface thereof
- A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
- A63C5/0411—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker asymmetric
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C5/00—Skis or snowboards
- A63C5/12—Making thereof; Selection of particular materials
- A63C5/126—Structure of the core
Definitions
- the invention relates to an improved ski, in particular a ski with asymmetrical structure.
- the second upper assembly takes the form of a shell which rests on the two side edges of the first lower set.
- a ski is subject to several types of deformations. It is, during an effort, mainly subjected to a simple normal flexion, exercised perpendicular to the sole on a ski placed between two supports, flat on its sole; this deformation allows it to marry the terrain; the resistance of a ski at this deformation, that is to say its stiffness in bending or its distribution of flexibility, is calculated to distribute the load of the skier on the snow.
- a ski is also subjected to simple lateral bending, which exercises laterally on the side of the ski and causes bending of the axis median longitudinal of the lower assembly; this deformation, no controlled, is harmful and thwarts the accuracy of skiing.
- a ski receives twists or twists, in particular at its two ends spatula and heel. As before, these deformations are parasitic and interfere with proper use of the ski.
- a ski is subject to compound deformations: bending plus torsion, or even normal bending more lateral bending, etc ....
- the width of the spatula is greater than that of the heel, which in turn is greater than that of the skate.
- Line edge joining the spatula to the heel is a essential characteristic of a ski. It varies from manufacturer to manufacturer, in particular depending on the specific use envisaged. So a slalom skiing does not have the same dimension line as a downhill ski, everything like that of a recreational ski is different from that of a ski of competition.
- This dimension line is of considerable importance in practice ski. It is therefore important that during practice, it is not randomly modified during deformation of the ski.
- FN neutral fiber
- the mechanical reinforcements are generally located in the intermediate space, on either side of the neutral fiber, especially to ensure good mechanization. To optimize the effectiveness of the reinforcements, it is important to position them as far as possible possible of the neutral fiber (FN), because in a calculation of stiffness in bending, the distance from the reinforcement to the neutral fiber is squared.
- FN neutral fiber
- a ski is symmetrical with respect to the plane of symmetry perpendicular to the plane of the sole and passing through the axis longitudinal median thereof.
- skis that is to say skis whose shape and volume vary in thickness, length and width from one side to the other of the same ski, but whose rib line remains nevertheless symmetrical.
- manufacturers to keep a simple normal bending i.e. without lateral bending or without parasitic twist, were forced to design an armed structure internal opposite, correcting the dynamic effects of the asymmetry of form.
- the mechanization elements that is to say the reinforcements, are placed so that the stiffnesses in bending are symmetrical with respect to the passing median vertical plane by the median longitudinal axis of the sole.
- the Applicant suggested inserting in the intermediate space filled with foam at least one reinforcement possibly asymmetrical, perforated tubular, arranged respectively in back and forth of the skate area.
- This embodiment aims to improve the guidance of the ski without stiffening it, to make it more comfortable.
- it does not ensure transmission optimal support on the edges, because as we know, it's at the level of the skate that these supports are the most powerful.
- the invention takes the opposite view to this rule in order to highlights the interesting effect of a controlled variation of the dimension line. It targets a ski, asymmetrical or not, which offers the possibility of allow the variation of the dimension line according to the impulse given by the skier or according to the conditions of use.
- FIGS 5 and 6 illustrate other embodiments of the invention.
- FIGS 7 and 8 show schematically the operation of the invention.
- Figure 9 shows the layout of a pair of skis.
- FIG. 10 illustrates another form of ski according to the invention.
- the ski shown in FIG. 1 essentially comprises, in the direction longitudinal a spatula (1), a central pad area (2), and a heel (3).
- this ski firstly comprises a first lower assembly, designated by the general reference (10), consisting of a flat sole (11), bordered on each of its two sides lateral by metal edges, respectively (12) and (13).
- This lower assembly (10) has a perpendicular plane of symmetry (P) in the plane of the sole (11), passing through the median longitudinal axis (I-I ') of ski and lower assembly (10).
- the ski also comprises a set upper, designated by the general reference (15), formed from above proper (16) and two side edges (17,18) based on the edges (12,13).
- These two sets, respectively lower (10) and upper (15) define an intermediate space (20), delimited by the above the sole (11), by the internal face of the edges (17,18) and by the inner face of the top (16).
- This intermediate space (20) comprises the neutral fiber shown schematically by the axis (FN), parallel to the plane of the sole (11).
- this neutral fiber (FN) is at the ends (1) and (3) parallel to the plane of the sole (11) and is located substantially equidistant from this plane of the sole (11), and the top plane (16).
- the intermediate space (20) comprises a solid solid flat strip of inclined reinforcement (25), going from the spatula (1) to the heel (3).
- This flat strip (25) is produced by example of metal or fibrous composite material for application common in the ski area.
- This characteristic reinforcement strip (25) extends from practically the tip (1) to the heel (2) with a inclination which varies regularly with respect to the plane of the sole (11), namely zero degrees at the tip (1) and the heel (3), at 45 ° to the skate level (2). This variation in the inclination of the flat strip (25) is progressive and continuous.
- this flat strip feature (25) is made of aluminum alloy commonly used in skiing called ZICRAL (registered trademark PECHINEY-CEGEDUR) of 120 centimeters long, 30 millimeters wide and 0.8 millimeters thick. To allow the passage of the components of the injected foam, this strip (25) is perforated with a multitude of 4 mm holes diameter.
- ZICRAL registered trademark PECHINEY-CEGEDUR
- this characteristic strip (25) extends practically from the lower edge of the ski, namely the edge (12), near the lower assembly (10), to the opposite edge skiing, near the upper assembly (15).
- the intermediate space (20) is filled with a filling material, such as for example foam polyurethane.
- the width of the flat reinforcement strip characteristic (25) can also vary from the spatula (1) to pad (2), then from this area to the heel (3). As already said, it is important that this inclined strip (25) is massive and possibly perforated.
- the space intermediate (20) filled with foam includes two inclined reinforcements (30) and (31) analogous to (25), which also vary from zero to 45 degrees, since the spatula or the heel to the skate.
- these two inclined reinforcements (30,31) are parallel, extend from the sole (11) to the top (16) in defining an angle of not more than 45 ° with respect to the plane of the sole, and are arranged asymmetrically with respect to the plane P by cutting the fiber neutral (FN).
- the space intermediate (20) comprises a neutral core (35) commonly used for this application, for example in wood, in which a reinforcement is inserted inclined (40) similar to (25,30 or 31).
- the rest of the intermediate space (20) is in known manner filled with polyurethane foam.
- this core (35) reinforced by the inclined strip (40) can occupy all the intermediate space (20).
- the width maximum of ski L1 at the tip is eighty-six millimeters, the maximum width L3 at the heel of eighty millimeters and the minimum width L2 at the level of the shoe (2) of sixty two millimeters.
- FIG. 7 is a schematic representation of this ski (200) at the level of the skate, first shown in lines mixed, at rest (201), and then, under the action of a load F normal to the surface of the sole, corresponding to the weight of a skier.
- the band characteristic of the invention (25) being inclined by 45 °, this load F is transforms into two components, respectively one component normal F1 and a lateral component F2.
- the ski deforms so that the ridge (131) lower of the ski (201) at rest will become the edge (130) of the ski (200) under charge. This edge (130,131) will move in normal bending of a arrow f1 and in lateral bending of a displacement f2.
- FIG. 8 shows, in top view, the ski according to the invention, in two positions, respectively at rest in mixed lines with its lines of edges (121) and (131), and under load in solid lines, with its two lines of edges (120) and (130).
- the lateral displacement f2 is, in this case, assimilated to a modification of the dimension line of the ski which from (121) to (120), will dig even more, while on the opposite side (131) and (130), this line of odds tend to become more straight, that is, flatter. So, when skiing, to make a small radius turn, the skier will exert on the internal edge a significant impulse F which decomposes in F1 and F2. This changes the dimension line at the level skating.
- a pair of skis includes two skis, respectively left designated by the general reference (G) and right designated by the reference (D). These skis are symmetrical with respect to a plan M passing between them.
- the characteristic bands (25) inclines descend from left to right on the left ski G1 and ascend from left to right on the right ski D, so that the directions of the two reinforcement strips (25) intersect on the plane M, in under the skis. So when the skier has to make turns large spokes, he exerts a minimum load on his skis and he inserts them in curves resulting from the original dimension line, without sensitive changes.
- the ski according to the invention has become interactive, since it is modify according to need.
- FIG. 10 shows a ski of particular shape in which the strip reinforcement (70) asymmetrical to the plane (P) is glued against the shell (26), the interior of the intermediate space (20) filled with foam polyurethane.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Lubricants (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Polyesters Or Polycarbonates (AREA)
Description
- un premier ensemble inférieur, constitué par une semelle plane destinée à assurer la glisse éventuellement bordée de carres métalliques, et par au moins un élément de renfort longitudinal inférieur, l'ensemble présentant un plan de symétrie perpendiculaire au plan de la semelle et passant par l'axe longitudinal médian de cet ensemble inférieur ;
- un second ensemble supérieur constituant le dessus et les chants ;
- enfin, un espace intermédiaire de remplissage compris entre le premier et le second ensembles, dans lequel est située la fibre neutre (FN) et qui comporte un autre élément de renfort.
- au niveau de la spatule, en figure 2,
- au niveau du patin, en figure 3,
- au niveau du talon, en figure 4.
Claims (4)
- Ski comprenant:un premier ensemble inférieur (10), comportant une semelle plane (11) présentant un plan de symétrie P perpendiculaire au plan de la semelle et passant par son axe longitudinal médian I-I',un second ensemble supérieur (15) formant un dessus (16) et des chants (17, 18) latéraux,ces deux ensembles définissant un espace intermédiaire (20), dans lequel est située la fibre neutre (FN) et dans lequel, est dispose de la spatule (1) au talon (3) une bande plate (25) de renfort définissant un angle aigu par rapport au plan de la semelle (11);
- Ski selon la revendication 1, caractérisé en ce que au niveau du patin, la bande plate (25) de renfort s'étend du premier ensemble inférieur (10) en direction du deuxième ensemble supérieur (15), en coupant le plan P et en définissant deux portions de même largeur, disposées de part et d'autre de ce plan P.
- Ski selon la revendication 1, caractérisé en ce que l'inclinaison de la bande plate de renfort (25) varie progressivement et de manière continue de la spatule (1) au talon (3).
- Ski selon la revendication 1, caractérisé en ce qu'il comprend plusieurs bandes de renfort (30,31,50,51,52,53) parallèles.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9314562 | 1993-11-30 | ||
FR9314562A FR2713100B1 (fr) | 1993-11-30 | 1993-11-30 | Ski. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0661086A1 EP0661086A1 (fr) | 1995-07-05 |
EP0661086B1 true EP0661086B1 (fr) | 1998-02-18 |
Family
ID=9453568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94420325A Expired - Lifetime EP0661086B1 (fr) | 1993-11-30 | 1994-11-22 | Ski |
Country Status (5)
Country | Link |
---|---|
US (1) | US5492357A (fr) |
EP (1) | EP0661086B1 (fr) |
AT (1) | ATE163271T1 (fr) |
DE (1) | DE69408568T2 (fr) |
FR (1) | FR2713100B1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5782482A (en) * | 1996-01-30 | 1998-07-21 | K-2 Corporation | Snowboard and method of construction |
DE29713628U1 (de) * | 1997-07-31 | 1998-11-26 | Robert Bosch Gmbh, 70469 Stuttgart | Kraftstoffeinspritzdüse |
WO1999016514A1 (fr) * | 1997-09-26 | 1999-04-08 | Volant Sports L.L.C. | Planche a neige dotee d'elements de structure selectivement ajoutes |
FR2810560B1 (fr) * | 2000-06-23 | 2002-10-11 | Salomon Sa | Planche a roulette |
SI23531B (sl) | 2010-11-15 | 2019-06-28 | Elan, D.O.O. | Smučka z asimetričnimi karakteristikami |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH152918A (de) * | 1931-02-28 | 1932-02-29 | Aluminium Ind Ag | Ski aus Leichtmetall-Legierung und Verfahren zur Herstellung desselben. |
US2581532A (en) * | 1946-08-23 | 1952-01-08 | Arne G Hem | Ski |
FR1290278A (fr) * | 1961-03-01 | 1962-04-13 | Procédé de fabrication des skis et skis obtenus par ledit procédé | |
FR87478E (fr) * | 1965-03-04 | 1966-05-06 | Plastiques Synthetiques | Ski perfectionné |
FR1435153A (fr) * | 1965-03-04 | 1966-04-15 | Plastiques Synthetiques | Ski perfectionné en matière plastique |
US3722901A (en) * | 1970-02-14 | 1973-03-27 | Nippon Musical Instruments Mfg | Ski having a hard type foamed resin core |
DE2063167B2 (de) * | 1970-12-22 | 1974-10-31 | Maschinenfabrik Augsburg-Nuernberg Ag, 8000 Muenchen | Ski |
JPS4949574A (fr) * | 1972-09-14 | 1974-05-14 | ||
AT383496B (de) * | 1985-02-25 | 1987-07-10 | Head Sportgeraete Gmbh | Ski |
DD242176B1 (de) * | 1985-11-08 | 1990-04-25 | Sportgeraete Veb K | Ski |
DD242178B1 (de) * | 1985-11-08 | 1989-12-27 | Sportgeraete Veb K | Kunststoffski |
US5108124A (en) * | 1986-05-23 | 1992-04-28 | Salomon S.A. | Ski having improved sliding and gripping properties |
FR2611517B1 (fr) * | 1987-02-27 | 1992-11-06 | Salomon Sa | Ski a caisson profile |
DD280654A3 (de) * | 1987-03-17 | 1990-07-18 | Komb Sportgeraete Veb | Leichtbaukern |
JPH03297479A (ja) * | 1990-04-17 | 1991-12-27 | Yamaha Corp | スキー板、並びに該スキー板に用いられる中芯体の製法及びスキー板の製法 |
FR2687924B1 (fr) * | 1992-02-28 | 1994-08-26 | Rossignol Sa | Ski possedant un renfort tubulaire ajoure. |
-
1993
- 1993-11-30 FR FR9314562A patent/FR2713100B1/fr not_active Expired - Fee Related
-
1994
- 1994-11-22 AT AT94420325T patent/ATE163271T1/de not_active IP Right Cessation
- 1994-11-22 EP EP94420325A patent/EP0661086B1/fr not_active Expired - Lifetime
- 1994-11-22 DE DE69408568T patent/DE69408568T2/de not_active Expired - Fee Related
- 1994-11-29 US US08/346,090 patent/US5492357A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE163271T1 (de) | 1998-03-15 |
FR2713100A1 (fr) | 1995-06-09 |
DE69408568T2 (de) | 1998-06-25 |
DE69408568D1 (de) | 1998-03-26 |
US5492357A (en) | 1996-02-20 |
FR2713100B1 (fr) | 1996-01-05 |
EP0661086A1 (fr) | 1995-07-05 |
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