EP0370197B1 - Ski, versehen mit seitwärts gelegener Trägheitsmasse - Google Patents

Ski, versehen mit seitwärts gelegener Trägheitsmasse Download PDF

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Publication number
EP0370197B1
EP0370197B1 EP89117608A EP89117608A EP0370197B1 EP 0370197 B1 EP0370197 B1 EP 0370197B1 EP 89117608 A EP89117608 A EP 89117608A EP 89117608 A EP89117608 A EP 89117608A EP 0370197 B1 EP0370197 B1 EP 0370197B1
Authority
EP
European Patent Office
Prior art keywords
ski
inertia
additional
vicinity
masses
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
Application number
EP89117608A
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English (en)
French (fr)
Other versions
EP0370197A1 (de
Inventor
Maurice Legrand
François Guers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Salomon SAS
Original Assignee
Salomon SAS
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Filing date
Publication date
Application filed by Salomon SAS filed Critical Salomon SAS
Priority to AT89117608T priority Critical patent/ATE86873T1/de
Publication of EP0370197A1 publication Critical patent/EP0370197A1/de
Application granted granted Critical
Publication of EP0370197B1 publication Critical patent/EP0370197B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/075—Vibration dampers

Definitions

  • the present invention relates to skis in which one or more additional masses of inertia make it possible to modify and adjust the moment of inertia of the ski both around a vertical axis, around a horizontal axis perpendicular to the direction longitudinal of the ski, and around the longitudinal axis of the ski.
  • the moment of inertia around the vertical axis, or axis of rotation of the ski influences the behavior of the ski in rotation, by determining the resistance that the ski opposes to a variation in the direction of movement.
  • a ski with a low moment of inertia for example a short ski or a light ski at its ends, is easier to turn than a ski with a high moment of inertia.
  • An easy to turn ski is particularly suitable for special snow conditions such as deep snow, spring snow, and for special terrain conditions such as bumpy slopes.
  • a ski with a high moment of inertia for example an elongated ski or a ski having relatively large masses at its ends, is particularly stable in direction during a rapid descent, because the forces exerted laterally on the ski by the Track unevenness is better absorbed due to the higher moment of inertia.
  • a ski is known in which, to modify its moment of inertia, masses centered on the longitudinal axis of the ski can be moved in the direction of its length and immobilized on or inside its posterior part or earlier.
  • By modifying the distance of the masses at the two ends of a ski one can vary its moment of inertia both around the vertical axis and around the central horizontal axis perpendicular to its longitudinal direction.
  • the practical implementation of this system is however very difficult and costly.
  • the arrangement of the masses outside the ski cannot be used in practice, by the fact that snow can accumulate in the adjustment members and prevent their operation.
  • the French document FR-A-2 382 245 teaches to have additional masses of interie in the longitudinal axis of the ski on the upper surface of the ski, at the two ends of the ski. This document does not include any teaching on the positioning of interior masses in the particular zones which provide an appropriate effect as will be described below.
  • the German document DE-A-1 960 684 teaches to have on the ski surface one or more damping strips made up of a viscoelastic layer and a stress layer, like an aluminum foil.
  • the bands which are preferably arranged on either side of the longitudinal axis of the ski and extend in an area located between the bindings and the front contact point of the ski.
  • a ski is not only subjected to bending and pivoting forces, but also to torsional forces and excitations.
  • the present invention results from the observation that it is possible to modify appreciably and advantageously the natural modes of torsional vibration and the damping of the ski by placing additional masses of inertia no longer in the longitudinal axis of the ski, but distributed by on either side near the edges of the ski. This results in a significant improvement in the handling of the ski in the curves, and in the length of attachment of the ski to the snow. It is understood that the provision of additional masses of inertia in the vicinity of the edges of the ski increases the moment of inertia of the ski around its longitudinal axis.
  • the precision and regularity of driving a turn is significantly improved, not less sensitivity of the ski to the terrain of the piste; directional stability is significantly improved to make it similar to that of heavy skis, without however increasing the total weight of the ski and keeping it at a value substantially lower than that of heavy skis.
  • the ski can be easily oriented at low speed of movement or rotation, while its relatively high moment of inertia around its longitudinal axis absorbs the rapid stresses imparted by the reliefs of the track during turns. This results in less physical and psychological fatigue for the skier.
  • the ski according to the present invention defined in claim 1 comprises a light structure, with a cell nucleus, and is provided with at least one element of density greater than the average density of structure of the body ski and constituting an additional mass of inertia distributed on either side of the vertical plane passing through one of the transverse contact lines of the ski; according to the invention, said additional mass of inertia is distributed off-center on either side of the vertical longitudinal median plane of the ski, so as to constitute an assembly equivalent to two weights offset respectively on either side of the plane vertical longitudinal median of the ski, said assembly having an appropriate moment of inertia with respect to the longitudinal axis of the ski.
  • the additional mass of inertia is a plate of non-uniform thickness, the thickness being small in the vicinity of the longitudinal axis of the ski and being greater in the vicinity of the edges of the ski.
  • the additional mass of inertia is a plate of non-uniform length, the plate length being shorter in the vicinity of the longitudinal axis of the ski and being greater in the vicinity of the edges of the ski.
  • This characteristic of non-uniform length can moreover be combined with the characteristic of non-uniform thickness mentioned above.
  • the additional mass of inertia comprises two separate lateral half-masses disposed respectively on either side of the longitudinal axis of the ski in the vicinity of the edges of the ski.
  • the additional masses of inertia can be placed on the upper surface of the ski.
  • the additional inertia masses are incorporated in the internal structure of the ski.
  • the lateral portions of additional inertia masses can be advantageously incorporated into the lateral portions of the ski on either side of the central cellular core.
  • the ski comprises inclined lateral edges, the inclination being such that the width of the ski is greater in the vicinity of its base than in the vicinity of its upper face, the lateral portions of inertia masses additional are shaped to follow the inclination of the edges, so that the center of gravity of the ski is thus lowered.
  • the ski according to the present invention comprises, in a traditional manner, a ski body 1 the central part of which is curved, curved in an upward arc and the two ends of which are raised upwards, the front end forming a spatula 2, the rear end 3 also being raised upwards.
  • the bending of the central part of the body 1 causes the ski to rest on the plane 4 along two transverse lines, a transverse front contact line 5, a transverse rear contact line 6.
  • the ski When in use, the ski is intended to rest on the ground according to its lower contact surface 7, which surface is limited by the two lines 5 and 6.
  • An additional front inertia mass 8 is placed in the vicinity of the front transverse contact line 5.
  • An additional rear inertia mass 9 is placed in the vicinity of the rear transverse contact line 6.
  • the additional masses of inertia 8 and 9 are fixed on the upper surface 10 of the ski.
  • the additional inertia masses 8 and 9 are fixed and incorporated in the body of the ski, being non-visible or only partially visible on the upper surface 10 of the ski.
  • a ski according to the present invention provided with its two additional masses of inertia 8 and 9, placed on a flat surface 4, and subjected to a load such as the weight of a user.
  • a load such as the weight of a user.
  • the lower contact surface 7 of the ski is entirely in contact with the plane 4.
  • the contact pressure between the lower ski surface 7 and the plane 4 varies as a function of the longitudinal position considered along the ski.
  • This pressure has a maximum 11 under the central zone occupied by the bindings and receiving the weight of the skier.
  • This pressure then has a minimum on either side of the maximum 11, namely a minimum 12 in the front third of the ski and a minimum 13 in the rear third.
  • the pressure has a relative maximum 14 in the vicinity of the front transverse contact line 5 of the ski and a second relative maximum 15 in the vicinity of the rear transverse contact line 6 of the ski. It can therefore be seen that, when the additional inertia masses 8 and 9 are positioned in the vicinity of the front contact lines 5 and rear 6 of the ski, their position corresponds to a relative maximum of contact pressure below the surface of the ski.
  • the additional front mass of inertia 8 is in one piece, and is distributed in a non-uniform manner on either side of the median longitudinal axis II - II of the ski. It may for example be a plate with a density greater than the average density of the ski body 1.
  • the additional mass of inertia 8 extends to the vicinity of the edges 16 and 17 of the ski.
  • the additional mass of inertia 8 comprises a central zone 85 connecting a first lateral zone 86 arranged in the vicinity of the edge 16 of the ski and a second lateral zone 87 arranged in the vicinity of the second edge 17 of the ski.
  • the central zone 85 has a relatively small thickness E in comparison with the thickness of the lateral zones 86 and 87.
  • the central zone 85 is arranged above the central core 19 with cellular structure of the ski.
  • the central zone 85 of the additional mass of inertia can be arranged below the central core 19.
  • the ski comprises lateral edges 16 and 17 inclined.
  • the lateral portions 86 and 87 of additional inertia masses are advantageously shaped to follow the inclination of the edges. In this case, it can advantageously have a greater width in the vicinity of the lower sliding surface 7 of the ski than in the vicinity of the upper surface 10 of the ski. In this way, the presence of the additional inertia masses lowers the center of gravity of the ski, that is to say, brings it closer to the lower sliding surface 7.
  • the zones lateral 86 and 87 of the additional inertia mass 8 have a triangular section and occupy all the available section between the lateral edges 16 and 17 and the lateral faces of the central core 19.
  • the additional front mass of inertia 8 is a plate comprising a central cutout 18 in V, so that the mass 8 is distributed in a privileged manner in the vicinity of the edges 16 and 17 of the ski .
  • the length of the plate forming the additional mass of inertia before 8 is not uniform, this length being shorter in the vicinity of the longitudinal axis II - II of the ski and being greater in the vicinity of the edges 16 and 17 of the ski.
  • This embodiment can be combined with the previous characteristic according to which the thickness of the plate forming the additional front mass of inertia 8 of the ski is smaller in the vicinity of the longitudinal axis II - II of the ski and greater in the vicinity side edges 16 and 17 of the ski.
  • FIG. 7 and 8 there is shown an embodiment in which the additional mass of inertia before 8 of the ski consists of two half-masses 81 and 82, the first half-mass 81 being arranged along the edge 16 ski, the second half-mass 82 being disposed along the ski edge 17.
  • the ski according to the invention advantageously has a cellular structure, with a central core 19 of constant width. The core 19 is thus bordered, over part of its length, by the half-masses 81 and 82, as shown in FIG. 8.
  • the half-masses 81 and 82 are advantageously shaped to follow the inclined shape of the edges.
  • lateral inertia masses can be distributed in the vicinity of the front contact line 5.
  • the two lateral half-masses 81 and 82 are shown, similar to the half-masses of the modes of previous embodiments, but associated with two additional lateral auxiliary masses 83 and 84 arranged slightly behind the additional masses 81 and 82.
  • FIG. 10 shows an embodiment in which the rear additional inertia mass 9 consists of two lateral half inertia masses 91 and 92 disposed respectively in the vicinity of the edges 16 and 17 of the ski.
  • the additional mass of inertia before 8 is distributed on either side of the vertical plane I - I passing through the transverse line of contact before 5 along a certain length, of the order of 15 to 25 centimeters.
  • the distance L1 between the anterior end of the additional mass of inertia 8 and the vertical plane I - I passing through the front transverse contact line 5 is advantageously between 0 and 10 centimeters; similarly, the length L2 between the rear end of the additional mass of inertia 8 and the vertical plane I - I passing through the front transverse contact line 5 is advantageously between 0 and 15 centimeters.
  • ski For the types of ski corresponding to a preferred type of evolution, for example a slalom ski, a giant slalom ski, a downhill ski, or a multi-purpose ski, it is possible to approximately adapt the behavior of the ski by adjusting the value of the additional inertia masses 8 and 9.
  • the additional front mass of inertia 8 has a value greater than the rear additional mass of inertia 9, the difference between the two masses possibly being of the order of 50 grams.
  • the additional masses may consist of lead plates or other heavy materials. They can be placed in housings provided for this purpose.
  • the housing of the additional masses can be carried out by any conventional machining means such as milling, routing, either in the central part 19 forming the core, or in the lateral parts called edges.
  • the additional inertia masses can be partially housed in housings provided in the core 19 and partially housed in the side edges of the ski.
  • additional inertia masses can be a composite material, combining the forming and adhesion qualities of a thermoplastic material with the density qualities of a metal such as lead, brass, tungsten.

Landscapes

  • Golf Clubs (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Claims (11)

  1. Ski mit leichtem Aufbau, welcher mit mindestens einem Element (8) versehen ist, das eine zusätzliche Trägheitsmasse (8) bildet, welche in dezentralisierter Weise beiderseits der mittleren vertikalen Längsebene (II-II) des Ski verteilt ist, derart, daß eine äquivalente Gesamtheit mit zwei jeweils beiderseits der mittleren vertikalen Längsebene (II-II) des Ski verschobenen Reguliergewichten gebildet wird, dadurch gekennzeichnet, daß
    das Element (8, 9) eine größere Dichte als die mittlere Dichte des Aufbaus des Skikörpers (1) aufweist und daß die Masse des Elementes (8, 9) auf eine bestimmte Länge beiderseits der vertikalen Ebene (I-I; III-III), welche durch eine der Querkontaktlinien (5, 6) des Ski verläuft, verteilt ist.
  2. Ski nach Anspruch 1, dadurch gekennzeichnet, daß er eine zusätzliche vordere Trägheitsmasse (8) aufweist, welche in der Nähe der vorderen Querkontaktlinie (5) des Ski angeordnet ist, und eine zusätzliche hintere Trägheitsmasse (9), welche in der Nähe der hinteren Querkontaktlinie (6) des Ski angeordnet ist.
  3. Ski nach Anspruch 1, dadurch gekennzeichnet, daß die zusätzliche Trägheitsmasse (8) eine Platte nicht einheitlicher Dicke ist, wobei die Dicke (E) im mittleren Teil (85) in der Nähe der Längsachse (II-II) des Ski klein und in den seitlichen Teilen (86, 87) in der Nähe der seitlichen Kanten (16, 17) des Ski größer ist.
  4. Ski nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die zusätzliche Trägheitsmasse (8) eine Platte nicht einheitlicher Länge ist, wobei die Länge in der Nähe der Längsachse (II-II) des Ski kleiner und in der Nähe der seitlichen Kanten (16, 17) größer ist.
  5. Ski nach Anspruch 1, dadurch gekennzeichnet, daß die zusätzliche Trägheitsmasse (8) zwei seitliche Halbmassen (81, 82) aufweist, welche jeweils beiderseits der Längsachse (II-II) des Ski der Nähe der seitlichen Kanten (16, 17) des Ski angeordnet sind.
  6. Ski nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die zusätzlichen Träheitsmassen (8, 9) auf der Oberseite des Ski befestigt sind.
  7. Ski nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die zusätzlichen Trägheitsmassen (8, 9) im inneren Aufbau des Ski einverleibt sind.
  8. Ski nach Anspruch 7, dadurch gekennzeichnet, daß die seitlichen Teile (86, 87) der zusätzlichen Trägheitsmassen (8) in den seitlichen Skiabschnitten beiderseits des zentralen Kerns (19) einverleibt sind.
  9. Ski nach Anspruch 8, dadurch gekennzeichnet dadurch, daß er seitliche geneigte Kanten (16, 17) aufweist, und daß die seitlichen Teile (86, 87) der zusätzlichen Trägheitsmassen derart geformt sind, daß sie der Neigung der Kanten folgen.
  10. Ski nach Anspruch 9, dadurch gekennzeichnet, daß die seitlichen Teile (86, 87) der zusätzlichen Trägheitsmassen in der Nähe der unteren Gleitoberfläche (7) eine größere Breite aufweisen als in der Nähe der Oberseite (10) des Ski.
  11. Ski nach Anspruch 10, dadurch gekennzeichnet, daß die seitlichen Teile (86, 87) der zusätzlichen Trägheitsmassen einen dreieckförmigen Querschnitt aufweisen.
EP89117608A 1988-11-07 1989-09-23 Ski, versehen mit seitwärts gelegener Trägheitsmasse Expired - Lifetime EP0370197B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89117608T ATE86873T1 (de) 1988-11-07 1989-09-23 Ski, versehen mit seitwaerts gelegener traegheitsmasse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815725 1988-11-07
FR8815725A FR2638649B1 (fr) 1988-11-07 1988-11-07 Ski muni de masses d'inertie laterales

Publications (2)

Publication Number Publication Date
EP0370197A1 EP0370197A1 (de) 1990-05-30
EP0370197B1 true EP0370197B1 (de) 1993-03-17

Family

ID=9372463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89117608A Expired - Lifetime EP0370197B1 (de) 1988-11-07 1989-09-23 Ski, versehen mit seitwärts gelegener Trägheitsmasse

Country Status (5)

Country Link
EP (1) EP0370197B1 (de)
JP (1) JPH0736843B2 (de)
AT (1) ATE86873T1 (de)
DE (1) DE68905440T2 (de)
FR (1) FR2638649B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5096217A (en) * 1988-12-01 1992-03-17 Kent Hunter Monoski with deep side cuts and cambered segment in the binding portion
AT400676B (de) * 1991-02-22 1996-02-26 Head Sport Ag Ski
FR2716117B1 (fr) * 1994-02-17 1997-06-06 Rossignol Sa Procédé pour la fabrication d'un ski à noyau et ski ainsi obtenu.
FR2951955A1 (fr) * 2009-11-03 2011-05-06 Alain Nicolas Calmet Masselottes aimantees pour le ski de randonnee
AT512157B1 (de) * 2012-03-27 2013-06-15 Fischer Sports Gmbh Vorrichtung zur Aufnahme einer Skibindung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3537717A (en) * 1968-11-29 1970-11-03 Minnesota Mining & Mfg Damped ski and method of making
AT337581B (de) * 1974-11-25 1977-07-11 Werner Konradler Amann Langgestreckter gleitkorper mit aufgebogenem vorderen ende, insbesondere schi
FR2503570A2 (fr) * 1980-02-21 1982-10-15 Rossignol Sa Ski
ATE37293T1 (de) * 1982-06-11 1988-10-15 Dynastar Skis Sa Mit einer schwingungsdaempfungsvorrichtung ausgeruesteter ski.
FR2615406B1 (fr) * 1987-05-22 1989-07-21 Salomon Sa Ski a amortissement reparti

Also Published As

Publication number Publication date
ATE86873T1 (de) 1993-04-15
DE68905440D1 (de) 1993-04-22
JPH0736843B2 (ja) 1995-04-26
JPH02177980A (ja) 1990-07-11
EP0370197A1 (de) 1990-05-30
FR2638649B1 (fr) 1991-01-11
FR2638649A1 (fr) 1990-05-11
DE68905440T2 (de) 1994-03-10

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