| 摘要 |
A non-corrosive bore hole cover apparatus for plugging a hole bored in a substrate is provided comprising a top plate molded from a non-metallic material, a bottom plate molded from a non-metallic material, a compressible ring gasket sandwiched between the top and bottom plates, and a threaded bolt. A bottom side of the top plate and a top side of the bottom plate each have an annular gasket locating ridge formed thereon. The compressible ring gasket is sandwiched between the top plate and the bottom plate such that the gasket locating ridges are inserted in either end of the compressible ring gasket. The threaded bolt passes through a top plate hole such that a head of the bolt is retained against a top side of the top plate and a tail end of the bolt is threaded through a hole of the bottom plate. The bolt is rotated into the threaded hole to draw the top and bottom plates together to compress and circumferentially expand the gasket. The threads of the bottom plate are preferably provided by a winged t-nut insert. Reinforcement rib members are preferably provided on the top and bottom plates. The top plate preferably has a convex configuration. The gasket preferably has a plurality of longitudinal reinforcement ribs. The top side of the bottom plate preferably has a tapered bolt locating ridge formed about the bottom plate hole. The color of the top plate preferably matches the color of the surface of the substrate.
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