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US 7,114,210 B2Granted
Ramp and method of construction
OwnerRichard N. Heinzinventor
Life of this patent
Estimating the term…
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.
Claims10
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.
Dependencies are inferred from the claim text.