Alpine ski with controlled flexion

Abstract

An alpine ski includes a zone for mounting a binding centered on a mounting point, and a single particular flexion deformation zone arranged between the mounting zone and one or each end of the ski. Under a static load of 900 Newtons, applied to the center of the particular deformation zone and along a direction perpendicular to the ski sole, the deformation zone adopts a generally dihedral configuration, whose deflection is greater than or equal to 13 mm, 15 mm in a particular embodiment, the ski being supported on two rods arranged under the sole, symmetrically on both sides of the zone and spaced from one another by an axial distance equal to 400 mm.

1 . An alpine ski comprising:
 a mounting zone for mounting a binding, the mounting zone being centered on a mounting point;   a front end and a rear end;   a sole;   at least a single particular flexion deformation zone consisting of a single particular front flexion deformation zone between the mounting zone and the front end of the ski and/or a single particular rear flexion deformation zone between the mounting zone and the rear end of the ski;   said particular flexion deformation zone being centered on a softening point positioned, in relation to the mounting point, at a distance ranging between 360 and 480 mm.   
     
     
         2 . An alpine ski according to  claim 1 , wherein:
 the particular flexion deformation zone is arranged so that, under a static load of 900 Newtons, applied to the center of the particular flexion deformation zone and along a direction perpendicular to the ski sole, the deformation zone adopts a generally dihedral configuration having a deflection greater than or equal to 13 mm, the ski being supported on two rods arranged under the sole, symmetrically on both sides of the particular flexion deformation zone and spaced from one another by an axial distance equal to 400 mm.   
     
     
         3 . An alpine ski according to  claim 2 , wherein:
 said deflection is equal to approximately 15 mm.   
     
     
         4 . An alpine ski according to  claim 1 , wherein:
 the particular flexion deformation zone extends, in relation to the mounting point of the binding zone over an axial distance ranging between 285 and 365 mm.   
     
     
         5 . An alpine ski according to  claim 1 , wherein:
 the particular flexion deformation zone is a zone having a reduced thickness with respect to the mounting zone, on the one hand, and with respect to a zone extending between the particular flexion deformation zone and said one of the ends of the ski, on the other hand.   
     
     
         6 . An alpine ski according to  claim 5 , wherein:
 the particular flexion deformation zone has a minimal thickness ranging between 6 and 8 mm, and wherein the zone extending between the particular flexion deformation zonel has a minimal thickness ranging between 8.5 mm and 11 mm.   
     
     
         7 . An alpine ski according to  claim 1 , wherein:
 the particular flexion deformation zone is formed by a fitting made out of a more flexible material than constituent material(s) of the mounting zone and end zones of the ski.   
     
     
         8 . An alpine ski according to  claim 1 , wherein:
 the particular flexion deformation zone is equipped with means for limiting or controlling deformation of the ski in the particular flexion deformation zone.   
     
     
         9 . An alpine ski according to  claim 8 , wherein:
 the limiting or controlling means include a plate fixed on the upper surface of the ski and which is mechanically biased as a function of deformation of the ski in the particular flexion deformation zone.   
     
     
         10 . An alpine ski according to  claim 1 , wherein:
 the at least a single particular flexion deformation zone comprises two particular flexion deformation zones, said two particular flexion deformation zones consisting of a first deformation zone arranged between the mounting zone and the front end of the ski, and a second deformation zone arranged between the mounting zone and the rear end of the ski.