Molded plastic ramp

Abstract

A molded plastic ramp is made in a one-step molding process. The ramp includes reinforced side and rear walls and a smooth radiused ramp surface. The ramp includes laterally extending side and rear supports that engage a ground surface and the forward portion of the ramp surface extends forward of the forward extent of the side supports.

I claim:  
     
       1. A one-piece molded ramp, comprising: 
       a) a smooth radiused concave ramp surface extending from a laterally elongated forward edge to a laterally elongated rear edge;  
       b) side walls extending downwardly from lateral edges of said ramp surface and a rear wall extending downwardly from said rear edge of said ramp surface;  
       c) each of said side walls and rear wall including integral reinforcement; and  
       d) lateral supports extending laterally of each side wall and rearwardly of said rear wall, said forward edge of said ramp surface extending forward of said side wall lateral supports;  
       e) said forward edge of said ramp surface comprising a lowermost structure of said ramp.  
     
     
       2. The ramp of  claim 1 , wherein said ramp surface comprises a part cylinder. 
     
     
       3. The ramp of  claim 1 , wherein said integral reinforcement comprises a plurality of elongated depressions in each of said side walls and rear wall. 
     
     
       4. The ramp of  claim 3 , wherein said depressions extend completely through said walls, appearing as projections or ribs on an undersurface of said walls. 
     
     
       5. The ramp of  claim 1 , wherein said ramp surface has a constant radius. 
     
     
       6. The ramp of  claim 5  wherein said constant radius comprises that of a 9′ radius circle. 
     
     
       7. The ramp of  claim 1 , wherein said lateral supports have an undersurface covered with a ground surface gripping material. 
     
     
       8. The ramp of  claim 7 , wherein said material comprises rubber. 
     
     
       9. The ramp of  claim 7 , wherein an undersurface of said forward edge of said ramp surface is covered with said material. 
     
     
       10. The ramp of  claim 1 , made of vacuum formed plastic. 
     
     
       11. The ramp of  claim 10 , wherein said plastic comprises ABS plastic. 
     
     
       12. The ramp of  claim 1 , wherein said ramp surface has a substantially uniform width from said forward edge to said rear edge. 
     
     
       13. A one-piece ABS plastic molded ramp, comprising: 
       a) a smooth, constantly radiused concave, part cylindrical ramp surface extending from a laterally elongated forward lowermost edge to a laterally elongated rear edge;  
       b) side walls extending downwardly from lateral edges of said ramp surface and a rear wall extending downwardly from said rear edge of said ramp surface;  
       c) each of said side walls and rear wall including integral reinforcement comprising a plurality of elongated depressions; and  
       d) lateral supports extending laterally of each side wall and rearwardly of said rear wall and having undersurfaces coated with rubber, said forward edge of said ramp surface extending forward of said side wall lateral supports;  
       said forward lowermost edge comprising a lowermost structure of said ramp.  
     
     
       14. The ramp of  claim 13 , wherein said depressions extend completely through said walls, appearing as projections or ribs on an undersurface of said walls. 
     
     
       15. The ramp of  claim 13 , wherein said constant radius comprises that of a 9′ circle. 
     
     
       16. The ramp of  claim 13 , wherein an undersurface of said forward edge of said ramp surface is covered with rubber. 
     
     
       17. A one-piece hollow molded skate and skateboard ramp, comprising: 
       a) a smooth radiused concave thin-walled ramp surface extending in a direction of extent perpendicularly from a laterally elongated sharp forward edge to a laterally elongated rear edge; and  
       b) thin-walled side walls extending downwardly adjacent lateral edges;  of said ramp surface and a thin-walled rear wall extending downwardly from said rear edge of said ramp surface;  
       c) said forward edge comprising a lowermost structure of said ramp; and  
       d) said ramp made of hard plastic; and  
         e )  said ramp surface being accessible via said forward edge by a skate or skateboard sized to support an adult human being and moving in a direction aligned with said direction of extent of said ramp surface .  
     
     
       18. The ramp of  claim 17 , wherein said ramp surface comprises a part cylinder. 
     
     
       19. The ramp of  claim 17 , made of vacuum formed plastic. 
     
     
       20. A one- piece molded ramp, comprising:    
         a )  a ramp surface including a smooth radiused laterally elongated concave portion extending to a rear termination, said ramp surface having lateral terminations;    
         b )  side walls extending downwardly from said lateral terminations and a rear wall extending downwardly from said rear termination;    
         c )  each of said side walls and rear wall being reinforced;    
         d )  lateral supported extends laterally of each side wall and rearwardly of said rear wall, a forward edge of said ramp surface extending forward of said side wall lateral supports;    
         e )  said forward edge of said ramp surface comprising a lowermost structure of said ramp and allowing access to said ramp surface;    
         f )  said portion of said ramp surface having a forward termination rearward of said forward edge and forward of said rear termination.    
     
     
       21. The ramp of  claim 20 , wherein said ramp surface has a substantially uniform width.  
     
     
       22. The ramp of  claim 20 , wherein said ramp is made of plastic.  
     
     
       23. The ramp of  claim 22 , wherein said plastic comprises ABS plastic.  
     
     
       24. The ramp of  claim 22 , wherein said plastic comprises vacuum formed plastic.  
     
     
       25. The ramp of  claim 20 , wherein said ramp surface comprises a part cylinder.  
     
     
       26. The ramp of  claim 25 , wherein said ramp surface has a constant radius of about  9 ′. 
     
     
       27. The ramp of  claim 20 , wherein said lateral supports have an undersurface covered with a gripping material.  
     
     
       28. The ramp of  claim 27 , wherein said gripping material comprises rubber.  
     
     
       29. A one- piece molded skate and skateboard ramp, comprising:    
         a )  a ramp surface including a laterally elongated concave thin - walled portion extending to a rear termination, said ramp surface having lateral terminations, said portion of said ramp surface being smoothly radiused throughout a length thereof;    
         b )  thin - walled side walls extending downwardly adjacent said lateral terminations and a thin - walled rear wall extending downwardly from said rear termination;    
         c )  a forward edge of said ramp surface being perpendicular to a direction of extent of said ramp surface, comprising a lowermost structure of said ramp and allowing access to said ramp surface;    
         d )  said portion of said ramp surface having a forward termination rearward of said forward edge and forward of said rear termination;    
         e )  said ramp surface being accessible via said forward edge by a skate or skateboard sized to support an adult human being and moving in a direction aligned with said direction of extent of said ramp surface.    
     
     
       30. The ramp of  claim 29 , wherein said ramp is made of hard plastic.  
     
     
       31. The ramp of  claim 30 , wherein said plastic comprises ABS plastic.  
     
     
       32. The ramp of  claim 29 , wherein said ramp surface has a substantially uniform width.  
     
     
       33. The ramp of  claim 29 , wherein said ramp surface comprises a part cylinder.  
     
     
       34. The ramp of  claim 33 , wherein said ramp surface has a constant radius of about  9 ′.  
     
     
       35. A one- piece molded ramp, comprising:    
         a )  a laterally elongated ramp surface comprising:    
         i )  a transition surface extending rearwardly from a laterally elongated forward edge of said ramp surface to a rearward termination of said transition surface;    
         ii )  a radiused laterally elongated concave ramp surface extending from said rearward termination of said transition surface rearwardly to a rear edge of said ramp;    
         b )  side walls extending downwardly from lateral terminations of said ramp surface and a rear wall extending downwardly from said rear edge of said ramp;    
         c )  each of said side walls and rear wall being reinforced;    
         d )  lateral supports extending laterally from a lower edge of each side wall and rearwardly from a lower edge of said rear wall;    
         e )  said forward edge of said ramp surface extending forward of said lateral supports;    
         f )  said forward edge of said ramp surface comprising a lowermost structure of said ramp and allowing access to said transition surface.    
     
     
       36. The ramp of  claim 35 , wherein said radiused concave ramp surface is smooth.  
     
     
       37. The ramp of  claim 35 , wherein said transition surface is non- radiused.    
     
     
       38. The ramp of  claim 35 , wherein said ramp surface has a substantially uniform width.  
     
     
       39. The ramp of  claim 35 , wherein said ramp is made of plastic.  
     
     
       40. The ramp of  claim 35 , wherein said ramp surface comprises a part cylinder.  
     
     
       41. The ramp of  claim 35 , wherein said lateral supports have an undersurface covered with a gripping material.  
     
     
       42. A one- piece hollow molded ramp, comprising:    
         a )  a ramp surface comprising:    
         i )  an unribbed transition surface extending rearwardly from a laterally elongated forward edge of said ramp surface to a rearward termination of said transition surface;    
         ii )  a radiused laterally elongated concave unribbed ramp surface extending from said rearward termination of said transition surface rearwardly to a rear edge of said ramp;    
         b )  thin - walled side walls extending downwardly adjacent lateral terminations of said ramp surface and a thin - walled rear wall extending downwardly adjacent said rear edge of said ramp;    
         c )  said forward edge of said ramp surface comprising a lowermost structure of said ramp and allowing access to said transition surface.    
     
     
       43. The ramp of  claim 42 , wherein said ramp is made of hard plastic.  
     
     
       44. The ramp of  claim 42 , wherein said ramp surface has a substantially uniform width.  
     
     
       45. The ramp of  claim 42 , wherein said ramp surface comprises a part cylinder.  
     
     
       46. The ramp of  claim 42 , wherein said transition surface is non- radiused.