Patent ID: 7500578
Filing Date: 2009-03-10
Classification: G01F,H02G

Abstract:
1. A lid for a utility box comprising: a compression molded solid member made only of plastic material and having spaced apart upper and lower sides and an outer edge, said outer edge extends around said member next to said lower side and which faces outward of said member, said lower side comprising a lower surface which is contiguous with said outer edge at least on two opposite sides of said outer edge, a plurality of spaced apart recesses having outer edges at said lower surface which are spaced from said outer edge of said member such that said lower surface surrounds said outer edges of said recesses, said recesses being formed during the molding process to enhance curing of the plastic material and hence the quality of the lid, each of said recesses comprises a surface which extends from its said outer edges into said member, the area of said lower surface being greater than the total area surrounded by said outer edges of said recesses, said member of said lid has the strength sufficient to withstand a load of at least 8,000 pounds applied to the upper side when the lower side is supported by means placed around a perimeter of said member.