Alpine ski

Abstract

An alpine ski including a body, front and rear tips, a running surface overlaid by at least one lower reinforcement layer, a core and at least one upper reinforcement layer. The core has a central member made of a hard material which extends over a portion of the length and width of the ski, and an edge made of a softer material that borders the core member on the sides, front and rear.

What is claimed is:  
     
         1 . An alpine ski comprising: 
 a longitudinally elongated body, a front tip, a rear tip, a lower running surface, two lateral running edges bordering said running surface;    at least one lower reinforcement layer positioned above said running surface;    a core positioned above said lower reinforcement layer;    at least one upper reinforcement layer positioned above said core;    said core comprising:    a central member made of a relatively hard material, said 
 central member extending over at least a portion of the length and width of the ski; and  
 an edge made of a material softer than said relatively hard material, said edge bordering said central member on lateral sides, front, and rear of said central member.  
   
     
     
         2 . A ski according to    claim 1   , wherein: 
 said central member of said core projects upwardly with respect to said edge, so as to form a projecting member from an upper surface of the ski.    
     
     
         3 . A ski according to    claim 2   , wherein: 
 said central member of said core projects by about 1.5 to about 8 millimeters with respect to said edge.    
     
     
         4 . A ski according to    claim 1   , wherein: 
 said central member is made of wood and said edge of said core is made of fiber-reinforced polyurethane foam.    
     
     
         5 . A ski according to    claim 1   , wherein: 
 said running edges include a laterally overlapping portion, and said upper reinforcement layer extends downwardly along lateral sides of the ski until reaching said running edges, said upper reinforcement layer covering said overlapping portion of said running edges.    
     
     
         6 . A ski according to    claim 1   , wherein: 
 said central member of said core extends between said upper and lower reinforcement layers.    
     
     
         7 . A ski according to    claim 1   , wherein: 
 said central member of said core extends over only a portion of a height of said core defined between said upper and lower reinforcement layers.    
     
     
         8 . A ski according to    claim 2   , further comprising: 
 two plates overlying the ski, each of said two plates having a mounting surface provided for a binding for a boot, each of said two plates further comprising two lateral wings extending along sides of said projecting member, said mounting surfaces of said plates being located above an upper surface of said projecting member, and said mounting plates being mounted for oscillation about a transverse axis extending through said central member of said core.    
     
     
         9 . A ski according to    claim 8   , wherein: 
 each of said plates is assembled to the ski by screws screwed into said central member of said core.    
     
     
         10 . A ski according to    claim 8   , wherein: 
 pads made of an elastically deformable material are positioned between each of said plates and said upper surface of said projecting member.    
     
     
         11 . A ski according to    claim 8   , wherein: 
 said ski has a length of about 1950 millimeters, a width of about 86 millimeters or more in a central zone, and said central member of said core having a length of about 1200 millimeters and a width of about 80 millimeters at a central part.