FR2591119A1 - SKI POLYVALENT. - Google Patents

Abstract

Ski consisting of an elongated body which extends over the length of the ski and terminates at the ends of the raised front and rear parts (3, 4), the front and rear parts (3, 4) having a trapezoidal configuration whose minor bases (3a, 4a) form, respectively, the tip and the rear heel and whose major bases are connected to the body (1) of the ski.

Description

- l - 22591119

SKI POLYVALENT

  The invention relates to a multipurpose ski including a support core formed by an elongate wooden core which extends over the entire length of the ski constituted by a median body and two front and rear parts and a resin-based casing. synthetics completely surrounding the wooden soul. The invention has for oblet a ski of the aforementioned type whose specific shape allows the skier to control its position during its sliding movement. It should be remembered that this position is essentially characterized by a certain angulation of the segments of the lower sets and by muscular relaxation, likely to allow the skier to absorb flexibly the inequalities of the surface of the ground.

of evolution.

  The invention more particularly oblet such a ski whose front and rear ends are raised and whose use considerably reduces the risk of falling while promoting the maneuverability of

  ski independently of the characteristics of the snow.

  The invention also relates to a short and efficient ski suitable for mountaineers whose safety of use in cornering reduces the risks of

fall and accident.

  According to the invention, the raised front and rear portions of the ski have a trapezoidal configuration whose small bases respectively constitute the leading edge of the snow and the rear heel and whose

  the big bases are connected to the median body.

  The ski thus produced will preferably have a continuously increasing thickness from front to rear, the maximum thickness of the ski being

located at the back end.

49398 I 167!

-2-

_-2 - 2591119

  The tests of 60 to 90 cm skis meeting the aforementioned form characteristics have indeed demonstrated that the skier was correctly supported in excellent conditions of adhesion and that the braking precision following the movement or the transverse inclination of the ski

were greatly improved.

  Moreover, it was found that the bust of the skier automatically took a centered position with respect to the ski, favorable to the maintenance of the latter in equilibrium and to the achievement of aplomb

  essential to the practice and to the good learning of skiing.

  The user can consequently improve his conditions of evolution in rough ground, strong slopes or in the practice of the ski

acrobatic and artistic.

  Other features and benefits of skiing will emerge from the description

  which follows of an embodiment thereof with reference to the accompanying drawings in which - Figure I is an elevational view of the ski on which has been shown

  schematically a shoe retained by a fastener.

  - Figure 2 is a top view of the ski.

  FIG. 3 is a perspective view of the ski shown in position

  sloping showing the grooved sole of it.

  FIG. 4 is a cross-sectional view of the ski in the 4-4 plane

of Figure 2.

  Referring to FIG. 1, the ski shown is constituted by a straight elongated body I with parallel edges 2 along the bearing surface of the ski which extends towards the front and towards the rear by parts 3, 4

  readings whose inclination is between 15 and 30.

49398!

3 - 2 5 2591119

  The front 3 and rear 4 parts are respectively connected to the body 1 and 1 'set is coated with a casing 6 based on different synthetic resins. As shown in Figure 1, the apoui area of the heel of the shoe is located in the connection area of the rear portion 4 to the body 1 of the ski in order to force the skier to maintain the position

natural to skiing.

  The front and rear parts 3, 4 have a trapezoidal configuration whose small bases 3a, 4a respectively constitute the leading edge of the snow and the rear heel while the large bases are connected to the body 1. However the front part 3 or spatula could

  just as well have a rounded shape of conventional appearance.

  Parts 3 and 4 of the ski will therefore have the same structure as

It wraps 6.

  By way of example, the ratio of the lengths a, b of the front 3 and rear 4 parts is between 1, 5 and 2 while the width C of the ski is

  substantially equal to the length b of the rear portion 4.

  In order to promote the natural sagging of the skier the thickness e of the casing 6 in the body area I is continuously increasing from the front to the rear of the ski and has a maximum thickness in the corresponding area at the rear heel . On the other hand, the thickness of the front portion 3 is continuously decreasing from the front end to the zone of connection with the body 1. The front of the ski is thinner.

  therefore more flexible and plays favorably the role of shock absorber.

  In this way, a ski is produced whose stiffness at the rear end is sufficient for the ski to evolve in all snow with improved grip. We will now describe the internal structure of the ski with reference to the

figure 4.

49398 1676

- 4 - 2591119

  By way of example, the elongated support base is based on wood and may be constituted by a core 7 of ventilated slatted reinforcement of constant thickness.

  The core 7 terminates at the front and rear ends of the parts 3, 4.

  The core 7, which may be reinforced if necessary, thus contains clogged channels 9 intended to reduce the lightening and elasticity of the ski. For this purpose the pre-bent core 7 is constituted by a plurality of rods 8 distributed in a ply along the width of the ski and separated between them by the channels 9. The various rods 8 are joined by frames 10 loaded with example by carbon fibers

  which clog the ends of the channels 9.

  The casing 6 consists of synthetic resins such as cold-chemically polymerizable polyurethane in application of a

  process known from FR-A-2,446,437.

  The assembly constituted by the core 7 and the frames 10 which give it the desired flexibility is then placed in a mold in which one

  injects or flows by gravity synthetic resins.

  According to another aspect of the invention the envelope 6 is formed by: - an upper lining 6a which covers the upper face and partially the lateral faces of the core 7 and which is based on

synthetic resins.

  - A lower lining 6b with a middle groove (it will be noted that the groove It extends until the birth of the spatula or front portion 3) which covers the underside and partially the side faces of the core 7 and which is at the base of specifically loaded synthetic resins. The setting up of this lining can ensure

  simultaneously fixing the edges 12.

  Without departing from the scope of the invention, the proposed ski can be realized

  in common widths according to the intended use.

49398 11676

- 5- 2591119

Claims (10)

  I. Multipurpose ski constituted by a support core (7) formed by an elongate body which extends over the entire length of the ski and ends at the ends of the raised front and rear portions (3, 4), characterized in that that the front and rear parts (3, 4) have a trapezoidal configuration whose small bases (3a, 4a) constitute respectively the leading edge of the snow and the rear heel and whose large bases   are connected to the body (1) of the ski.   Ski according to claim 1, characterized in that the ratio of the   A / B lengths of the front and rear parts are between 1.5 and 2.   3. Ski according to claim 2, characterized in that the width c   of it is equal to the length b of the rear part 4.   Ski according to one of Claims 1 to 3, characterized by   causes the thickness of the front portion (3) of the ski to be continuously   decreasing from one front to the connection zone with the body (1).   Ski according to one of claims 1 to 4, characterized by   fact that the thickness (e) of the ski body is continuously increasing from front to rear and has a maximum thickness in the area corresponding to the back heel.   6. Ski according to one of claims 1 to 5, characterized by the   that the angle of inclination of the front and rear parts is included between 15 to 30.   Ski according to one of Claims 1 to 6, characterized by the   fact that the heel support zone of the shoe is located in the zone   connecting the rear part of the ski to the body of the ski. 49398 11676 - 6 - 2591119   8. Ski according to one of claims 1 to 7, characterized by   the support core is constituted by a plurality of wooden rods (8) distributed in a ply along the width of the ski and which are separated by channels (9) clogged at their ends by a reinforcement (10) connecting rods.   9. Ski according to claim 8, characterized in that the core (7) is constituted by a ventilated and curved wood block covered with a set of linings (6a, 6b) of which the thickness is continuously increasing the area connecting the front part (3) to the back of the ski.   10. Ski according to any one of claims 8 or 9, characterized by   the fact that the lining (6b) which covers the underside of the core (7) is based on specifically loaded synthetic resins and ensures   optionally fixing the edges (12).