EP0657192B1 - Ski comprenant une structuration adaptée en fonction des zones de glisse - Google Patents
Ski comprenant une structuration adaptée en fonction des zones de glisse Download PDFInfo
- Publication number
- EP0657192B1 EP0657192B1 EP94116597A EP94116597A EP0657192B1 EP 0657192 B1 EP0657192 B1 EP 0657192B1 EP 94116597 A EP94116597 A EP 94116597A EP 94116597 A EP94116597 A EP 94116597A EP 0657192 B1 EP0657192 B1 EP 0657192B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- width
- ski
- zone
- lateral
- ski according
- 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
- A63C5/044—Structure of the surface thereof of the running sole
Definitions
- the invention relates to a ski for evolution on snow, such as an alpine ski, a monoski or snowboard.
- It relates more particularly to a ski provided with a lower sole topped with streaks, whose sliding ability has been improved.
- the sliding surface is provided with ridges discontinuous oriented in the longitudinal direction whose shape is wavy, of pace generally sinusoidal, so as to preferably give the sole a roughness coefficient Ra within an appropriate value range.
- the object of the present invention is to provide a satisfactory solution to these problems.
- the Applicant has in fact found that there exists at a surface of sliding of the stressed areas differently on snow, and that consequently the structure had to be adapted to take this into account.
- the central region of the sole plays an important role in the flat gliding of the ski, so it is important that it is strongly structured to allow good flow and avoid the suction phenomenon.
- the invention therefore aims to provide a ski for evolution on snow comprising a lower surface of variable width (L) made of plastic, provided with a plurality of discontinuous stripes and two lateral edges which border laterally said surface; which is based on a front contact line and a rear contact line when the ski is unloaded.
- L variable width
- the lower surface includes a central flat glide area extending between the two lines of contact, and on at least one side, a curved sliding side zone bordering said central zone between the two contact lines, the width (l1) of which is greater than 0.03 L; the surface of the rear part at least, of said zone center, between the rear contact line and the center line of ski boot, being provided with a marked structure such that the values measured significant roughness parameters Rtm and Rku are greater than values measured on the surface of said lateral sliding curve area.
- the lower surface comprises two symmetrical lateral zones relative to the longitudinal axis of the ski, bordering on both sides the central area.
- the parameters Rtm and Rku used are those among the roughness parameters which make it possible to best appreciate on a surface the difference between a strong or marked structuring effective for breaking and evacuating the water film according to the invention and a finer or less marked structure limiting friction with snow when cornering.
- the Rtm parameter designates the average of the maximum roughnesses which measure the vertical distance between the highest point and the lowest point of the roughness profile over the total evaluation length, according to DIN 4762 / 1E or ISO 4287/1.
- the Rku (Roughness Kurtosis) parameter designates the flattening parameter of the density of height distribution. The flatter the density curve, the more Rku is great; on the contrary, if the curve is pointed and its maximum well centered, Rku is low (ISO Standard 4287/1).
- the Rtm value is less than or equal to 15 ⁇ m and the Rku value is less than or equal to 3 in the surface of said lateral zone (s), then that Rtm> 15 ⁇ m and Rku> 3 in the rear part, at least, of the central zone as defined above.
- the width (l1) of the lateral zone (s) is between 0.03 L and 0.3 L, knowing that the width (l2) of the central zone of sliding flat must remain greater than or equal to 0.45 L.
- the width (l1) of the lateral zone (s) increases from from the vicinity of the minimum bottom surface width line (L min), in direction of contact lines. Indeed, it is advantageous to reserve a surface more or less striated at the ends in order to improve the easy pivoting of the ski. Thus, it is preferable that the width (l1) is greater than or equal to 2 mm in the vicinity of the surface width line lower (L min) and is greater than or equal to 10 mm in the vicinity of the lines of ski contact.
- the width (l2) of the central zone strongly striated is constant.
- the structuring of the central area is achieved by passing a tool under the hot and pressurized sole shape of a roll comprising a relief pattern with constant width (l) of edges on the surface of which a plurality of discontinuous ribs is formed.
- the width (l1) of the area (s) lateral (s) is constant and the width (l2) of the central zone of sliding flat gradually increases from the vicinity of the minimum width (L min) in direction of contact lines.
- the width (l1) of the lateral zone (s) is greater than or equal to 6 mm.
- the central zone strongly structured comprises a plurality of short, straight and discontinuous streaks, arranged in separate or nested rows.
- At least a majority of streaks are oriented along the longitudinal axis of the ski. Some may, however, be inclined and present an angle relative to the longitudinal axis, so in particular to avoid an excessive rail effect or to improve the release of the water film in certain snow conditions or for certain types of skis.
- the structuring presents a roughness gradient such that the measured parameters Rtm and Rku gradually increase from the edge towards the longitudinal axis over at least a significant part of the width of the lower surface being understood that the roughness (Rtm and Rku) can remain substantially constant over small portions of width. This may be the case, for example, by predicting a gradual increase in streak density, an increase in certain streak parameters (depth, width, length, shape, etc.).
- the structuring along the axis longitudinal has a roughness gradient such that the measured parameters Rtm and Rku vary gradually, from the rear contact line towards of the front contact line, over at least a substantial part of the length ski ; it being understood that the roughness can remain substantially constant over certain portions of length.
- FIG. 1 it is an alpine type ski with a view to below, where we can see the bottom surface or gliding sole (1) in polyethylene, the side edges (2), the tip (3) and the heel (4).
- the sole is arched and rests on a front contact line (10) and a rear contact line (11) when the ski is unloaded.
- a front contact line (10) and a rear contact line (11) When the ski is unloaded.
- the area between these two contact lines (10, 11) meets the snow and becomes the so-called "bearing" surface of the ski.
- a central zone (5) known as "gliding flat" is formed on the bearing surface, of width (l2) in which a significant structuring is carried out.
- Figure 1a shows, in enlarged view, an example of significant structuring according to the invention. It can be a multitude of short straight (50), discontinuous and arranged in rows nested one inside the other.
- the bearing surface comprises, on either side of the central zone (5), two lateral zones (6, 7) of sliding in curve, of width (l1). These areas have a less marked structure in which the streaks (70) are more spaced, more short, shallower and narrower, for example, than those in the area central ( Figure 1b). Structuring could also be almost non-existent and the surface as smooth as possible.
- Figure 2 shows the ski when a turn is engaged and its inclination by compared to the surface of the ground. Part of the sole penetrates more or less deep in snow or ice, depending on conditions, thanks to the cut exercised by the edge (2).
- the width (L) of the sole varies to follow the side line of the ski.
- the width (l1) is always greater than 0.03 L, at any point of width (L) of the sole, measured between the contact lines (10, 11).
- (l1) is between 0.03 L and 0.3 L, knowing that (l2) must remain greater than or equal to 0.45 L.
- (l1) can be between 3 mm and 25 mm, approximately and (l2) is greater than 27 mm.
- (l2) is constant between the contact lines (10, 11) and thus (11) varies gradually.
- the width (l1) of each lateral zone (6, 7) gradually increases towards the lines contact (10, 11).
- the roughness parameters are measured perpendicular to the axis longitudinal of the ski; just like the width measurements L, l1, l2.
- Figures 3 and 4 illustrate an advantageous example for performing the structuring of the sole of a ski according to the invention and more particularly in the case where it is desired to obtain a constant width (l2) of the central zone (5) of the lower surface giving a variable width (l1) of the lateral zones (6, 7).
- a device comprising a heated tool (8) having the form of a roller and which has on its surface a relief pattern with constant width (l) edges, comprising a plurality of discontinuous ribs (80).
- the surface of the roller is applied, under pressure, against the surface of the sole (1) of the ski to prepare by operating a longitudinal scrolling of the ski between several skids of guide (9).
- FIG. 5 shows a variant of the invention in which the width (l1) of the lateral zones of sliding in curve is constant along the ski. Because of the coast line of the ski which gives the lower surface a width (L) which is variable shape of "wasp waist” the width (l2) of the central flat glide area is also variable along the ski and increases from the vicinity of the line of width (L min) towards the contact lines (10, 11) of the ski.
- FIG. 6 only the rear part of the central zone (5), lying between the rear contact line (11) and the shoe center line (12) is provided with streaks.
- the shoe center line (12) is a line given by each manufacturer and its position in relation to the ski environment can vary from one type of ski to the other.
- the front part between the front contact line (10) and the middle line shoe (12) is slightly or not striated so that the roughness parameters Rtm, Rku defined in the front part are close to the values or equal to respective values of the lateral zones (6, 7) of sliding in curve. Tests performed by the applicant have demonstrated that such a configuration may be more effective in certain snow conditions.
- the structuring of the central zone (5) presents a roughness gradient such that the measured parameters Rtm and Rku decrease gradually, from the rear contact line (11) towards the line front contact (10).
- This gradient can be obtained for example by making gradually reduce the number of streaks and their size (length, width and depth) from the rear line (11) to the front line (10).
- the Rtm and Rku values can be substantially constant in the central area (5).
- the decreasing progression of the values Rtm and Rku is done in stages, i.e. by a series of adjacent short portions in which the values Rtm and Rku are substantially constant but vary from one portion adjacent to the other.
- the length of the streaks can vary, in general, between 4 mm and 50 mm depending on the type of snow and type of ski used.
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Laminated Bodies (AREA)
- Road Paving Structures (AREA)
Description
- la figure 1 représente une première forme de réalisation de la surface de glisse selon l'invention en vue de dessous du ski ;
- les figures 1a et 1b sont des vues à plus grande échelle de détails de la figure 1 ;
- la figure 2 illustre le ski de la figure 1 en prise de virage en vue de coupe ;
- les figures 3 et 4 montrent un exemple de réalisation de la structuration de la semelle d'un ski de la figure 1 ;
- la figure 5 est une seconde forme de réalisation de la surface de glisse selon l'invention en vue de dessous comparable à la vue de la figure 1 ;
- la figure 6 est une autre forme selon une variante de la figure 5 ;
- la figure 7 est une autre forme selon une autre variante ;
- les figures 8 à 10 sont des exemples variés de structuration en vue de détail selon l'invention.
- profondeur des stries : comprise entre 0,02 mm et 0,08 mm ;
- longueur des stries : comprise entre 10 mm et 60 mm ;
- largeur des stries : comprise entre 0,1 mm et 0,3 mm ;
- motif : rangées imbriquées ;
- coefficient Rtm : compris entre 20 µm et 80 µm ;
- coefficient Rku compris entre 5 et 35
- des stries (50) parallèles et disposées en rangées séparées, orientées longitudinalement (figure 8) ;
- des stries parallèles en rangées imbriquées, orientées longitudinalement (figure 9) ;
- des stries parallèles orientées longitudinalement (50a) et d'autres inclinées (50b) (figure 10).
Claims (14)
- Ski pour évolution sur neige comprenant une surface inférieure (1) de largeur variable (L) en matière plastique, munie d'une pluralité de stries discontinues (50, 70) et deux carres latérales (2) qui bordent latéralement ladite surface (1) ; laquelle repose sur une ligne de contact avant (10) et une ligne de contact arrière (11) lorsque le ski est non chargé ; la surface inférieure (1) comprenant une zone centrale de glisse à plat (5) s'étendant entre les deux lignes de contact (10, 11) et, sur un côté au moins, une zone latérale de glisse en courbe (6, 7) bordant ladite zone centrale (5) entre les deux lignes de contact, dont la largeur (l1) est supérieure à 0,03 L ; la surface de la partie arrière au moins, de ladite zone centrale (5), comprise entre la ligne de contact arrière (11) et la ligne de milieu de chaussure (12) du ski, étant munie d'une structuration marquée telle que les valeurs mesurées des paramètres significatifs de rugosité Rtm et Rku sont supérieurs aux valeurs mesurées sur la surface de ladite zone latérale de glisse en courbe (6, 7).
- Ski selon la revendication 1, caractérisé en ce que la surface inférieure comprend deux zones latérales symétriques (6, 7) par rapport à l'axe longitudinal du ski, bordant de part et d'autre la zone centrale (5).
- Ski selon la revendication 1 ou 2, caractérisé en ce que la valeur Rtm est inférieure ou égale à 15 µm et la valeur Rku est inférieure ou égale à 3 dans la surface de ladite(desdites) zone(s) latérale(s) (6, 7), alors que Rtm > 15 µm et Rku > 3 dans la partie arrière, au moins, de la zone centrale (5).
- Ski selon l'une quelconque des revendications 1, 2 ou 3, caractérisé en ce que la largeur (l1) de la(des) zone(s) latérale(s) (6, 7) est comprise entre 0,03 L et 0,3 L, sachant que la largeur (l2) de la zone centrale de glisse à plat est supérieure ou égale à 0,45 L.
- Ski selon l'une quelconque des revendications précédentes, caractérisé en ce que la largeur (l1) de la(des) zone(s) latérale(s) (6, 7) augmente à partir du voisinage de la ligne de largeur de la surface inférieure minimale (L min), en direction des lignes de contact (10, 11).
- Ski selon la revendication 5, caractérisé en ce que la largeur (l2) de la zone centrale (5) fortement striée est constante.
- Ski selon la revendication 5 ou 6, caractérisé en ce que la largeur (l1) de la(des) zone(s) latérale(s) (6, 7) est supérieure ou égale à 2 mm au voisinage de la ligne de largeur minimale (L min) et (l1) est supérieure ou égale à 10 mm au voisinage des lignes de contact (10, 11).
- Ski selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la largeur (l1) de la(des) zone(s) latérale(s) (6, 7) est constante et la largeur (l2) de la zone centrale de glisse à plat (5) augmente progressivement à partir du voisinage de la largeur (L) minimale en direction des lignes de contact (10, 11).
- Ski selon la revendication 8, caractérisé en ce que la largeur (l1) de la(des) zone(s) latérale(s) (6, 7) est supérieure ou égale à 6 mm.
- Ski selon l'une quelconque des revendications précédentes, caractérisé en ce que la zone centrale fortement structurée (5) comprend une pluralité de stries (50) courtes, rectilignes et discontinues, disposées en rangées séparées ou imbriquées.
- Ski selon la revendication 10, caractérisé en ce que une majorité au moins des stries (50) sont orientées selon l'axe longitudinal du ski.
- Ski selon l'une quelconque des revendications précédentes, caractérisé en ce que la structuration présente un gradient de rugosité tel que les paramètres mesurés Rtm et Rku augmentent progressivement à partir de la carre (2) vers l'axe longitudinal sur une partie significative, au moins, de la largeur (L) de la surface inférieure étant entendu que la rugosité (Rtm et Rku) peut être sensiblement constante sur de petites portions de largeur.
- Ski selon l'une quelconque des revendications précédentes, caractérisé en ce que la structuration selon l'axe longitudinal présente un gradient de rugosité tel que les paramètres mesurés Rtm et Rku varient progressivement, à partir de la ligne de contact arrière (11) en direction de la ligne de contact avant (10), sur une partie substantielle au moins de la longueur du ski ; étant entendu que la rugosité peut être sensiblement constante sur certaines portions de longueur (ΔL).
- Procédé de fabrication d'un ski selon la revendication 1, caractérisé en ce que la structuration de la zone centrale (5) est réalisée par le passage sur la semelle (1), à chaud et sous pression, d'un outil (8) sous forme d'un rouleau comprenant un motif en relief à largeur (l) constante de bords sur la surface duquel est formé une pluralité de nervures discontinues (80).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9315020 | 1993-12-09 | ||
FR9315020A FR2713497B1 (fr) | 1993-12-09 | 1993-12-09 | Ski comprenant une structuration adaptée en fonction des zones de glisse en courbe et de la zone de glisse à plat repérable sur ledit ski. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0657192A1 EP0657192A1 (fr) | 1995-06-14 |
EP0657192B1 true EP0657192B1 (fr) | 1998-05-13 |
Family
ID=9453922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94116597A Expired - Lifetime EP0657192B1 (fr) | 1993-12-09 | 1994-10-21 | Ski comprenant une structuration adaptée en fonction des zones de glisse |
Country Status (6)
Country | Link |
---|---|
US (1) | US5727807A (fr) |
EP (1) | EP0657192B1 (fr) |
JP (2) | JPH07194761A (fr) |
AT (1) | ATE165987T1 (fr) |
DE (1) | DE69410221T2 (fr) |
FR (1) | FR2713497B1 (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2611134B2 (ja) * | 1993-11-16 | 1997-05-21 | 川崎重工業株式会社 | エンジンの吸気装置 |
NO940482D0 (no) * | 1994-02-11 | 1994-02-11 | Joergen Karlsen | Alpin parski |
US6663137B2 (en) | 1998-03-10 | 2003-12-16 | Karlsen Joergen | Snowboard |
FR2800622B1 (fr) * | 1999-11-05 | 2002-02-08 | Salomon Sa | Planche de glisse destinee a la pratique du surf sur neige |
US20030127812A1 (en) * | 2002-01-04 | 2003-07-10 | Charles Mehrmann | Bi-directional sliding board |
AT410900B (de) | 2002-01-22 | 2003-08-25 | Fischer Gmbh | Verfahren zur herstellung einer strukturierten lauffläche für gleiteinrichtungen sowie eine nach diesem verfahren hergestellte strukturierte lauffläche |
FR2845611B1 (fr) * | 2002-10-15 | 2004-12-03 | Rossignol Sa | Planche de glisse sur neige a spatule et a releve de talon ameliores |
US6857653B2 (en) | 2002-10-31 | 2005-02-22 | Anton F. Wilson | Gliding skis |
AT500213B1 (de) * | 2003-04-23 | 2007-09-15 | Atomic Austria Gmbh | Schi |
US7073810B2 (en) * | 2003-06-25 | 2006-07-11 | Wilson Anton F | Ski with tunnel and enhanced edges |
US20050280230A1 (en) * | 2004-06-18 | 2005-12-22 | Chorng-Jiang Lin | Anti-slip surface for skateboards |
AT502718B1 (de) * | 2006-03-23 | 2007-05-15 | Fischer Gmbh | Ski |
FR2926735B1 (fr) * | 2008-01-25 | 2010-03-26 | Salomon Sa | Ski alpin avec moyens de reglage |
US8061731B2 (en) * | 2009-01-05 | 2011-11-22 | Michael John Popenas | Ski brake |
AT514124A1 (de) * | 2013-03-22 | 2014-10-15 | Fischer Sports Gmbh | Aufstiegshilfe für einen Ski sowie Verfahren zur Herstellung |
AT514968B1 (de) * | 2013-10-22 | 2017-11-15 | Fischer Sports Gmbh | Lauffläche für einen Ski |
CH710453A2 (de) * | 2014-12-09 | 2016-06-15 | Ruoss Robert | Schneegleitelement. |
US11065528B2 (en) * | 2018-09-18 | 2021-07-20 | Stephen S. Daniell | Thrust-responsive surface material for skis |
WO2023022114A1 (fr) * | 2021-08-18 | 2023-02-23 | 株式会社フジミインコーポレーテッド | Appareil glissant et son procédé de fabrication |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH161592A (de) * | 1931-12-31 | 1933-05-15 | Wolfinger Josef | Ski und Verfahren zu seiner Herstellung. |
FR934319A (fr) * | 1946-09-24 | 1948-05-19 | Perfectionnements aux skis et analogues | |
DE961335C (de) * | 1953-12-12 | 1957-04-04 | Franz Kneissl | Ski |
CH331559A (fr) * | 1956-05-16 | 1958-07-31 | Ray Gisele | Ski |
DE2623852A1 (de) * | 1975-06-17 | 1976-12-23 | Fischer Gmbh | Ski |
DE2621490A1 (de) * | 1976-05-14 | 1977-12-01 | Voelkl Ohg Franz | Ski |
SE7806170L (sv) * | 1977-06-10 | 1978-12-11 | Norsk Skiforsk | Vallningsfritt skidbelag av plast samt sett for dess framstellning |
AT355467B (de) * | 1977-09-26 | 1980-03-10 | Kuntara Wilhelm Dr | Ski, insbesondere langlauf- oder loipenski |
US4406478A (en) * | 1978-07-20 | 1983-09-27 | Fischer Gesellschaft M.B.H. | Process and apparatus for forming a profiled tread surface on a ski |
DE8515091U1 (de) * | 1984-05-25 | 1986-02-27 | Blizzard GmbH, Mittersill, Salzburg | Ski, insbes. Langlaufski, mit einem Laufflächenbelag |
CH670571A5 (en) * | 1985-04-30 | 1989-06-30 | Blizzard Gmbh | Facing esp. for langlauf ski |
FR2643565A1 (fr) * | 1989-02-24 | 1990-08-31 | Grand Chavin Skis | Ski de fond |
AT398038B (de) * | 1989-11-02 | 1994-08-25 | Fischer Gmbh | Ski |
FR2683730B1 (fr) * | 1991-11-19 | 1995-03-31 | Rossignol Sa | Ski, ou autre engin ou planche de glisse sur neige, a semelle striee. |
US5344177A (en) * | 1992-04-28 | 1994-09-06 | Minnesota Mining And Manufacturing Company | Ski base and running surface |
-
1993
- 1993-12-09 FR FR9315020A patent/FR2713497B1/fr not_active Expired - Fee Related
-
1994
- 1994-10-21 EP EP94116597A patent/EP0657192B1/fr not_active Expired - Lifetime
- 1994-10-21 DE DE69410221T patent/DE69410221T2/de not_active Expired - Fee Related
- 1994-10-21 AT AT94116597T patent/ATE165987T1/de not_active IP Right Cessation
- 1994-11-28 US US08/348,240 patent/US5727807A/en not_active Expired - Fee Related
- 1994-12-09 JP JP6305302A patent/JPH07194761A/ja active Pending
-
1996
- 1996-10-29 JP JP1996010987U patent/JP3037260U/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5727807A (en) | 1998-03-17 |
EP0657192A1 (fr) | 1995-06-14 |
DE69410221T2 (de) | 1998-11-12 |
FR2713497A1 (fr) | 1995-06-16 |
JP3037260U (ja) | 1997-05-16 |
ATE165987T1 (de) | 1998-05-15 |
FR2713497B1 (fr) | 1996-02-02 |
DE69410221D1 (de) | 1998-06-18 |
JPH07194761A (ja) | 1995-08-01 |
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