USRE41851EExpiredUtility

Ramp and method of construction

92
Individually held — no corporate assignee on recordPriority: Aug 3, 2004Filed: Mar 24, 2008Granted: Oct 26, 2010
Est. expiryAug 3, 2024(expired)· nominal 20-yr term from priority
Inventors:Richard Heinz
C08J 7/0427B32B 2307/54B32B 2307/536B66F 7/243B32B 2266/0228B32B 3/263B32B 2255/102B32B 2255/26B32B 21/047B32B 2605/00B32B 29/007B32B 27/065B32B 3/04C08J 2325/06C08J 2475/02C08J 7/046
92
PatentIndex Score
9
Cited by
16
References
33
Claims

Abstract

A ramp constructed of an expanded plastic foam parallelepiped core encased in a thick coating of polyurea provides a lightweight, stable ramp suitable for vehicle servicing. A low angle, long length ramp of a low weight is provided. Heavy duty versions have on edge panels embedded in the core.

Claims

exact text as granted — not AI-modified
1. A ramp comprising a core comprised of a parallelepiped substantially solid block of low density plastic foam with a front face at an entry end sloping from a bottom side to a substantially horizontal top surface; and
 a polyurea coating applied over the core to encase said core therein and substantially strengthen said core as well as providing a durable ramp surface.  
 
     
     
       2. The ramp according to  claim 1  wherein said polyurea coating has a thickness on the order of 35-65 mils. 
     
     
       3. The ramp according to  claim 1  wherein said low density plastic foam core is constructed of expanded polystyrene foam. 
     
     
       4. The ramp according to  claim 1  wherein said polyurea coating has a top coat of polyurea applied thereto. 
     
     
       5. The ramp according to  claim 1  wherein said core has a panel extending on edge between said top face and said bottom side embedded within said plastic foam block. 
     
     
       6. The ramp according to  claim 5  wherein said core has a plurality of on edge sheets of spaced panels embedded in said low density plastic foam block. 
     
     
       7. The ramp according to claim  6    1  wherein a plastic, cardboard or plywood panel covers each side  a surface of said core. 
     
     
       8. The ramp according to  claim 1  wherein said sloping front face is at an angle on the order of 10° from the bottom side. 
     
     
       9. The ramp according to  claim 8  wherein said ramp is of a length ranging from about 5 feet to 6 feet. 
     
     
       10. The ramp according to  claim 3  wherein said expanded polystyrene foam core is of a density ranging from 1 to 6 pounds per cubic foot. 
     
     
       11. A ramp comprising:
   a core comprising a substantially solid block of low density polymer foam with a front face at an entry end sloping from a bottom side to a position adjacent a substantially horizontal surface; and        a polyurea coating applied over the core to encase said core therein and substantially strengthen said core as well as providing a durable ramp surface.      
     
     
       12. The ramp according to  claim 11 , wherein said polyurea coating has a thickness on the order of  25 - 65  mils.  
     
     
       13. The ramp according to  claim 11 , wherein said low density plastic foam core is constructed of expanded polystyrene foam.  
     
     
       14. The ramp according to  claim 11 , wherein said polyurea coating has a top coat of polyurea applied thereto.  
     
     
       15. The ramp according to  claim 11 , wherein said core has a panel extending on edge between said top face and said bottom side embedded within said plastic foam block.  
     
     
       16. The ramp according to  claim 15 , wherein said core has a plurality of spaced panels embedded in said low density plastic foam block.  
     
     
       17. The ramp according to  claim 11 , wherein a plastic, cardboard or plywood panel covers a surface of said core.  
     
     
       18. The ramp according to  claim 11 , wherein said sloping front face is at an angle on the order of  10 ° from the bottom side.  
     
     
       19. The ramp according to  claim 18 , wherein said ramp is of a length ranging from about  5  feet to  6  feet.  
     
     
       20. The ramp according to  claim 13 , wherein said expanded polystyrene foam core is of a density ranging from  1  to  6  pounds per cubic foot.  
     
     
       21. A composite structure for supporting a vehicle comprising:
   a core comprising a substantially solid block of low density plastic foam;        at least one reinforcing panel reinforcing said core; and        a polyurea coating applied over the core and reinforcing panel to encase said core and reinforcing panel therein and substantially strengthen said core as well as providing a durable surface.      
     
     
       22. The composite structure according to  claim 21 , wherein said polyurea coating has a thickness on the order of  25 - 65  mils.  
     
     
       23. The composite structure according to  claim 21 , wherein said low density plastic foam core is constructed of expanded polystyrene foam.  
     
     
       24. The composite structure according to  claim 21 , wherein said polyurea coating has a top coat of polyurea applied thereto.  
     
     
       25. The composite structure according to  claim 21 , wherein said reinforcing panel extends on edge between a top face and a bottom side embedded within said plastic foam block.  
     
     
       26. The composite structure according to  claim 25 , wherein said core has a plurality of spaced panels embedded in said low density plastic foam block.  
     
     
       27. The composite structure according to  claim 21 , wherein said reinforcing panel is a plastic, cardboard or plywood panel covering at least one surface of said core.  
     
     
       28. The composite structure according to  claim 21 , wherein said composite structure includes a front face at an entry end sloping at an angle on the order of  10 ° from a bottom side to a substantially horizontal top surface.  
     
     
       29. The composite structure according to  claim 28 , wherein said front face is of a length ranging from about  5  feet to  6  feet.  
     
     
       30. The composite structure according to  claim 23 , wherein said expanded polystyrene foam core is of a density ranging from  1  to  6  pounds per cubic foot.  
     
     
       31. A composite structure for supporting a vehicle comprising:
   a core comprising a substantially solid block of low density plastic foam;        at least one support surface on said core configured and arranged to receive and support a vehicle wheel; and        a polyurea coating applied over the core to encase said core therein and substantially strengthen said core as well as providing a durable surface.      
     
     
       32. The composite structure according to  claim 31 , wherein said polyurea coating has a thickness on the order of  25 - 65  mils.  
     
     
       33. The composite structure according to  claim 31 , wherein said low density plastic foam core is constructed of expanded polystyrene foam.

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