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
• • 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
  • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness

Definitions

• the invention relates to a device for modifying the radial geometry of a ski, and this in proportion to the bending of this ski.
• the invention also relates to a ski equipped with this device.
• the device works regardless of the composite construction technique of the ski ("sandwich", monohull or other).
• ski is used to designate any blade used to rest and slide on snow, that is to say effectively a ski as such, but also a monoski, a snowboard or the like.
• mechanical device for modifying the radial geometry of a ski in proportion to its flexion, is meant a device exploiting the relative displacement of at least one rod oriented substantially longitudinally to the ski in order to cause a deformation of the ski according to its cross section and result in the desired modification of the geometry of its underside.
• the radial geometry of the ski for example slightly convex when the ski is placed flat on a support, becomes progressively concave, as the ski is flexed during its use, due to a support developed by a skier in the middle part of this ski and hooking reactions developed by the support, in front and behind this middle part and in particular at the tip and the heel of the ski.
• This modification or adaptation of the radial geometry of the ski as a function of the flexion stresses makes it possible to improve the general behavior of the ski as well as its performance.
• the device makes it possible to adapt the ski to the quality of the snow and / or to the requirements of the user.
• One result which the invention aims to obtain is a device of the aforementioned type which makes it possible to perfectly control the longitudinal dimension of each part of the ski in which the radial geometry must be modified.
• Another result which the invention aims to obtain is a device of the aforementioned type which, after removal of a bending stress having generated a modification of the radial geometry of the ski, guarantees the restoration of the radial geometry to its initial state.
• the subject of the invention is a device of the aforementioned type, in particular, characterized in that it comprises elements, called transmission elements which, each interposed between the rod and the ski:
• the invention also relates to a ski equipped with this device.
• FIG. 1 a top view of a ski equipped with a device according to the invention, according to a first embodiment
• FIG. 2 on a larger scale, a partial and top view of the ski of FIG. 1, substantially at the level of the tip,
• FIG. 3 a cross-sectional view of the ski of FIG. 2, before modification of the cross section of this tip,
• FIG. 4 a cross-sectional view of the spatula of FIG. 2, after modification of the cross section of this spatula,
• FIG. 5 a partial top view of the tip of a ski equipped with a device according to the invention according to a second embodiment.
• ski 5 equipped with at least one device 6 for modifying its radial geometry.
• the ski 5 has been drawn transversely expanded so as to allow a schematic representation and comprising, in particular, functional blocks as functional means.
• the device 6 for modifying the radial geometry of the ski 5 is active essentially at the level of at least one of the end parts 55, 56 of the ski 5 and, preferably, of both.
• the modification device 6 comprises at least one rod 1 of non-compressible material and this rod 1 is oriented substantially longitudinally to the ski 5 and guided in translation in this direction, by a guide means 4 for this purpose.
• the rod 1 comprises carbon fibers retained in a matrix of polymeric material.
• the rod 1 may be of flattened section, but this is not limiting.
• the guide means 4 is advantageously constituted by the sides of a groove arranged under the level of the upper surface 51 of the ski 5 to accommodate the rod 1, and this, over at least a fraction of the length of this rod 1 .
• the guide means 4 could also consist of parts, of synthetic or other material, attached and fixed to the upper surface 51 of the ski 5.
• the rod 1 cooperates, substantially at one of its 101 opposite ends 101, 102, with a stop in translation 103 associated with said ski 5 so that the bending of this ski 5 causes relative displacement of the rod 5 towards one of the extreme parts of the ski 5.
• the end 101 of the rod 1 which cooperates with the stop in translation 103 is called the passive end 101 and, the opposite end 102 of the rod 1 is called the active end 102.
• each translational stop stop 103 is located in the region of the fastening means 8 of a boot (not shown) on the ski 5.
• the rod 1 must extend, at least in part, outside a plane of the ski 5 which contains the so-called neutral fiber of this ski 5.
• the ski 5 and the rod 1 bend according to their own radius of curvature.
• the modification device 6 of the radial geometry comprises at least one element 2, called the transmission element 2 which, interposed between the rod 1 and the ski 5:
• the modification device 6 comprises at least one row 20 of a plurality of transmission elements 2 spaced apart and oriented with respect to the rod 1, this row 20 of transmission elements 2 being located at least on one side of the rod 1.
• the modification device 6 comprises at least one rod 1 and two rows 20 of transmission elements 2 spaced apart and oriented relative to the rod 1, these rows 20 being located on either side of the rod 1, approximately symmetrically with respect to the longitudinal axis 10 of this rod 1.
• the modification device 6 comprises at least one set 30 of two rods 1 which extend substantially parallel to one another and, each between a stop in translation 103 fixed on the ski 5 and the part of ski 5 whose radial geometry must be modified.
• the modification device 6 comprises at least one set 30 of two rods 1 which extend substantially parallel to one of the edges 52, 53 of the ski
• each row 20 extend substantially parallel to each other, so as to form a substantially constant angle with the longitudinal axis 10 of the rod 1 with which they are associated.
• the transmission elements 2 of each row 20 extend so as to form with the longitudinal axis 10 of the rod 1 with which they are associated, an angle which varies from transmission element 2 to other.
• the modification device 6 acts on the ski 5 at a plurality of points spaced along the longitudinal direction of said ski 5 and not in a concentrated manner as in the case of the device of international application WO 02/401 15. Compliance with the above technical characteristics makes it possible to better control the longitudinal dimension of each part of the ski 5 in which the radial geometry must be modified.
• the structure and the mode of operation of the modification device 6 allows the designer of the ski 5 to increase the capacity of the cross section of the ski 5 to be deformed, without this resulting in a weakening of the ski 5, of the this modification device 6 contributes to the mechanical strength of the ski 5.
• each stop in translation 103 is capable of ensuring the stop in translation of a rod 1 in two opposite directions S1, S2 of movement of the rod 1 along its longitudinal axis 10, so retaining the rod 1 to make it move back (direction S2) when the ski 5 is released from constraints inducing its bending, and
• each transmission element 2 is interposed between the rod 1 and the ski 5, in such a way that, when said ski 5 is released from stresses inducing its bending and that the rod 1 moves back, this element of transmission 2 applies to the ski 5 an action which causes a modification of radial geometry opposite to that caused during the displacement of the rod 1 towards the end of said ski 5 equipped with this transmission element 2.
• each transmission element 2 is constituted and acts in the manner of a connecting rod, that is to say that it consists of a part resistant to compression and articulated on the rod 1 and on the ski. 5.
• the rod 1 and the ski 5 have notches and each transmission element 2 has ends which are shaped so as to fit in these notches.
• the adaptation of a ski to environmental conditions can be carried out by replacing each rod 1, for example, by a rod 1 which is longer or shorter and / or more rigid or less rigid than that in place.
• the modification device 6 comprises a means 9 for adjusting the useful length of each rod 1 that it comprises, that is to say the length of the rod 1 between, on the one hand, the stop d 'stop in translation 103 with which it cooperates and, on the other hand, the row of transmission elements 2 with which the rod 1 cooperates.
• this adjustment means 9 makes it possible to apply to the rod 1, a compression preload of predetermined value, so as to anticipate the pushing action of this rod 1 on the transmission elements 2, during the bending of the ski 5.
• this adjustment means 9 is a fixed ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
• the adjusting means 9 comprises two parts 90, 91 assembled by threaded and tapped parts. one of these parts 90, 91 has at least one face 92, 93 intended to cooperate with the stop in translation 103,
• the other part 91 has a means 94 for immobilizing the passive end of the rod 1, so that a pushing or pulling action can be transmitted to the rod 1.
• this immobilization means 94 comprises a bore in which the end of the rod situated at the level of said abutment is engaged and immobilized.
• At least one of the parts 90, 91 constituting the adjustment means 9 have flats (not shown) for their actuation using flat keys (not shown).
• the modification device 6 comprises a means 12 for absorbing a translational movement of each rod 1 which extends beyond a predetermined limit, so that when the bending of the ski 5 itself exceeds a predetermined value, the modification device 6 is, in a way, disengaged and does not suffer any damage affecting its operation.
• the absorption means 12 is located at each translation stop 103 and consists of a mechanism 12 for elastic resetting of each translation stop 103, when the latter receives from the rod 1 an action whose intensity is located beyond a predetermined value, the erasure of this stop 103 thus making it possible to release the rod 1 to authorize its movement beyond the predetermined limit.
• . has a peripheral V-shaped groove so as to carry two conical faces 92, 93,
• the translational stop is constituted by at least one piece 103 which carries a rounded surface 104, is guided in translation towards the peripheral V-shaped groove and elastically urged towards this groove so as to be firmly held there.
• the device of the invention comprises at least one rod 1 which extends over substantially the entire length of the ski 5.
• the rod 1 passes under the fastening means 8 of the ski boot.

Landscapes

• Prostheses (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Aerials With Secondary Devices (AREA)
• Toys (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=4567357

Family Applications (1)

Country Status (5)

Families Citing this family (16)

Family Cites Families (11)

• 2002
  • 2002-11-07 AT AT02771972T patent/ATE298611T1/de not_active IP Right Cessation
  • 2002-11-07 WO PCT/CH2002/000603 patent/WO2003039686A1/fr not_active Ceased
  • 2002-11-07 DE DE60204905T patent/DE60204905T2/de not_active Expired - Fee Related
  • 2002-11-07 EP EP02771972A patent/EP1441817B1/de not_active Expired - Lifetime
  • 2002-11-07 US US10/494,720 patent/US7344148B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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