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US 4,917,219 AGranted
Wheel chock
OwnerStephen K. Henryinventor
Life of this patent
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Abstract
A light-weight wheel chock is formed having a thin exterior shell of rigid, chemically-inert plastic material, such as high-density polyethylene, and an interior cavity filled with light-weight rigid or semi-rigid foam, such as high-density polyurethane foam.
Claims1
A wheel chock comprising:
- (a) an exterior shell of polyethylene comprising a base, a back surface, two side surfaces, and a ramp surface as the hypotenuse between the base and back surfaces;
- (b) a core of rigid foam of a secondary material;
- (c) a number of fill holes through the bottom surface of the exterior shell to allow introduction of a secondary material into the interior of the shell to form a core;
- and
- (d) a number of feet attached to the bottom surface of the exterior shell covering said fill holes.
2 more elements
Dependencies are inferred from the claim text.