Gliding apparatus having two boards

Abstract

A gliding apparatus that includes an upper board and a lower board affixed to one another by two linkages. Each of the linkages of the apparatus includes a lower footing affixed to the lower board, an upper footing affixed to the upper board, and a journal that enables a rotation of the lower footing relative to the upper footing along a substantially transverse axis of the apparatus.

What is claimed is:  
     
         1 . A gliding apparatus comprising: 
 two boards positioned one on top of the other, said two boards comprising an upper board to support a user's feet, and a lower board having a lower gliding surface, two linkages affixing said two boards to one another such that said two boards are kept spaced apart, said two linkages being longitudinally spaced apart, each of said two linkages includes a lower footing affixed to said lower board, an upper footing affixed to said upper board, and a journal enabling a rotation of said lower footing relative to said upper footing along a substantially transverse axis of the apparatus.    
     
     
         2 . A gliding apparatus according to  claim 1 , wherein one of said two footings has the shape of a half-cylinder, wherein a second of said two footings is a block in which a cylindrical concave groove is arranged, and wherein said journal of said one footing relative to the other includes a cylindrical surface of the half-cylinder, said cylindrical concave groove of said block, a hole of the block, a slit of the half-cylinder-shaped footing, and a screw and a nut.  
     
     
         3 . A gliding apparatus according to  claim 2 , wherein said half-cylinder-shaped footing is affixed to said lower board, and wherein the grooved block is affixed to said upper board.  
     
     
         4 . A gliding apparatus according to  claim 3 , wherein said slit has an upper portion and a lower portion that extends said upper portion downward, the portions being oriented along the longitudinal direction of the apparatus, said lower portion being both longer and wider than said upper portion.  
     
     
         5 . A gliding apparatus according to  claim 3 , wherein said lower footing is affixed to said lower board by means of two screws.  
     
     
         6 . A gliding apparatus according to  claim 3 , wherein said upper footing is affixed to said upper board comprises a screw and a nut, said screw extending through a hole of said upper board.  
     
     
         7 . A gliding apparatus according to  claim 1 , wherein said upper board is wider than said lower board.  
     
     
         8 . A gliding apparatus according to  claim 1 , wherein said upper and lower boards each have substantially an identical length.  
     
     
         9 . A gliding apparatus according to  claim 1 , wherein said linkages are arranged symmetrically relative to a central transverse axis of the apparatus.  
     
     
         10 . A gliding apparatus according to  claim 1 , wherein each of said upper and lower boards have front and rear ends, each of said front and rear ends of said upper and lower boards having shovels.  
     
     
         11 . Gliding apparatus according to  claim 1 , wherein at least one spacer is positioned between one of said two linkages and one of said upper and lower boards.  
     
     
         12 . A gliding apparatus according to  claim 1 , wherein one of said footings is a base, wherein the other of said footings is a lug, and wherein said journal of one of said footings relative to the other of said footings includes a pin.  
     
     
         13 . A gliding apparatus according to  claim 1 , wherein one of said footings is a slit base, wherein the other of said footings is a slit base, and wherein said journal includes a flexible blade inserted into the slits of said bases.