Board for sliding on snow with sidewalls of variable width

Abstract

A ski, monoski, or snowboard includes a central longitudinal core ( 7 ). Variable width side walls ( 13 a , 13 b ) are connected with sides of the core. Reinforcement layers ( 8 a , 8 b , 8 c ) are connected with upper and lower surfaces of the core and the side walls. A protection and decoration layer ( 9 ) is disposed on an upper surface and a sliding layer ( 10 ) including a sliding surface (S) and two edges ( 11 a , 11 b ) are mounted on the lower surface. Each of the variable width side walls includes an inner wall element ( 13″ a , 13″ b ) and an outer wall element ( 13′ a , 13′ b ). At least one of the inner and outer wall elements is thicker in selected regions, such as a central, front, and rear region, to enhance the grip of the edges in the selected region.

1 . A board for sliding on snow such as a ski, a mono-ski or snowboard, in the shape of an elongated beam of varying thickness, with a central area known as boot area extended forward by a front area raised to its end to form a tip, and rearward by a rear area ending with a heel, said beam including
 a central longitudinal core   at least one reinforcement layer   an upper protection and decoration layer   a sliding layer including a sheet of material with a low coefficient of friction bounded by two edges   such that each lateral side of the core is secured to a variable width sidewall respectively made by a longitudinal profile,   at least one of the variable width sidewalls being made, at least on a part of the length of the board, of two interconnected wall elements of the variable width sidewall, extending longitudinally, namely an inner wall element of the variable width sidewall whose internal lateral side ( 14   a ,  14   b ) is secured to the lateral side ( 12   a ,  12   b ) of the core ( 7 ) and an outer wall element ( 13 ′ a ,  13 ′ b ) of the variable width sidewall, such that the width of at least one of the variable width sidewalls varies longitudinally, such that the two wall elements of the variable width sidewalls are secured by cooperating shapes between an inner lateral side of the outer wall element and an external lateral side of the inner wall element.   
     
     
         2 . The sliding board according to  claim 1 , wherein the lateral internal face of the variable width sidewall and/or the lateral external face of the variable width sidewall includes at least one projection located in a central boot area. 
     
     
         3 . The sliding board according to  claim 2 , wherein the lateral internal face of the variable width sidewall and/or the lateral external face of the variable width sidewall includes an undulation. 
     
     
         4 . The sliding board according to  claim 3 , wherein the variable width sidewall includes two areas of lesser width separated by a protruding area, namely a central projection, such that a front area of lesser width is bounded towards the front by a front projection and the central projection, and such that a rear area of lesser width is bounded longitudinally by the central projection and towards the rear by a rear projection. 
     
     
         5 . The sliding board according to  claim 1 , wherein the inner wall element of the variable width sidewall has a constant width, while the outer wall element of the variable width sidewall has a variable width such that the external faces follow a profile of an edge line. 
     
     
         6 . The sliding board according to  claim 4 , wherein the inner wall element of the variable width sidewall and the outer wall element of the variable width sidewall have a variable width. 
     
     
         7 . The sliding board according to  claim 5 , wherein the variable width sidewall in the front area and the rear area is made of two wall elements, while the variable width sidewall in the central boot area includes only the inner wall element of the variable width sidewall. 
     
     
         8 . The sliding board according to  claim 1 , wherein the inner side face of the outer wall element of the variable width sidewall presents an undulation in cooperation with a corresponding undulation presented on the outer side face of the inner wall element of the variable width sidewall. 
     
     
         9 . The sliding board according to  claim 8 , wherein the variable width sidewall is such that a part in the central boot area and a part in the front and rear zones includes two walls elements. 
     
     
         10 . The sliding board according to  claim 1 , wherein the outer side faces extend vertically to make substantially a right angle with the sliding layer, while generated surfaces generating the outer side faces of the variable width sidewalls are substantially perpendicular relative to the sliding layer and follow the edge line longitudinally. 
     
     
         11 . The sliding board according to  claim 1 , wherein the outer side faces extend upward to make an acute angle with the sliding layer, generated surfaces generating the outer side faces of the variable width sidewalls being so inclined upward and toward a plane of symmetry relative to the sliding and follow the edge line longitudinally. 
     
     
         12 . The sliding board according to  claim 11 , wherein the angle of inclination is variable to have a greater value in the boot area and progressively decreasing toward the ends. 
     
     
         13 . The sliding board according to  claim 6 , wherein the variable width sidewall in the front area and the rear area is made of two wall elements, while the variable width sidewall in the central boot area includes only the inner wall element of the variable width sidewall. 
     
     
         14 . A board for sliding on snow comprising:
 an elongated central core;   variable width side walls, each variable width side wall including an inner wall element connected with the core and an outer wall element connected with the inner wall element;   reinforcement layers connected to top surfaces of the core and the variable width sidewalls and to bottom surfaces of the core and the variable width sidewalls;   a sliding layer connected with a bottom surface of the reinforcement layers, the sliding layer including a sliding surface bounded by edges.   
     
     
         15 . The sliding board according to  claim 14 , wherein at least one of the wall elements has wider regions which cause more grip by the edges than thinner regions. 
     
     
         16 . The sliding board according to  claim 15 , wherein at least one of the wall elements is wider in a central region. 
     
     
         17 . The sliding board according to  claim 15 , wherein the at least one side walls undulates in thickness to be thicker in front, central, and rear regions.