Assembly type skateboard-ramp

Abstract

An assembly type skateboard-ramp includes several groups of ramp, two sides of which have swallow-tailed tongue and groove joints respectively. The ramp has a curve face and an opposite vertical face. Each group of ramps has same form and gradually decreased size. The swallow-tailed tongues of ramps of a group are inserted in corresponding swallow-tailed grooves of ramps of another group. These skateboard-ramps can be assembled and disassembled.

1 . An assembly type skateboard-ramp compromising: a skateboard-ramp ( 1 ), skateboard-ramp ( 2 ), skateboard-ramp ( 3 ), skateboard-ramp ( 4 ); at each end of any one of the four skateboard-ramps,  1 ,  2 ,  3 , and  4 , swallow-tailed grooves  11 ,  21 ,  31 ,  41  and swallow-tailed tongues  12 ,  22 ,  32 ,  42  are provided; the swallow-tailed tongues  32  of ramp  3  are inserted into the swallow-tailed grooves  41  of ramp  4 ; the swallow-tailed tongues  22  of ramp  2  are inserted into the swallow-tailed grooves  31  of ramp  3 ; the swallow-tailed tongues  12  of ramp  1  are inserted into the swallow-tailed grooves  21  of ramp  2 ; an integrated skateboard-ramp is formed by assembling separated skateboard-ramps;  
   
   
       2 . The assembly type skateboard-ramp as claimed in  claim 1 , wherein the other two sides of the forementioned skateboard-ramp  1 ,  2 ,  3  and  4 , one is set as curve face  13 , 23 , 33  and  43  with the same radian; the other is set as vertical face  14 ,  24 ,  34  and  44 , different skateboard-ramps are connected together in sequence.