Skateboard

Abstract

A skateboard comprising a main board, a left and a right sheathing member and wheels, wherein: the main board is made of metal by extrusion, and is provided interiorly thereof with a plurality of through holes with various geometric shapes to leave a plurality of bracing ribs, then the main board is cut and bent to form a desired shape. The bottom of the main board is mounted with a plurality of wheels to form the skateboard.

What is claimed is:  
     
         1 . A skateboard comprising a main board, a left and a right sheathing member and wheels, wherein: 
 said main board is made of metal, extended therein longitudinally with a plurality of through holes to form a plurality of bracing ribs, thereby, said main board is strengthened;    said left and right sheathing members are provided therein both with a receiving space which is in a shape corresponding to that of either of said front and rear ends of said main board;    said sheathing members are put and fixed on the left and right ends of said main board to complete the structure of said main board, and said main board is mounted beneath it with said wheels to complete said skateboard.    
     
     
         2 . A skateboard as in  claim 1 , wherein, 
 said main board is made of aluminum or aluminum alloy.    
     
     
         3 . A skateboard as in  claim 1 , wherein, 
 said main board has a front and a rear end both raised upwardly, said front and rear ends have narrowed widths.    
     
     
         4 . A skateboard as in  claim 1 , wherein, 
 at least one of said sheathing members is provided beneath it with a protrusion to form a brake.