초록 ▼

A base for a manhole or catch basin structure having an embedded plastic canal-bed liner and a corresponding blocking member or hood. The plastic liner has an annular, outwardly extending flange which becomes embedded in a sidewall of the base to form a unitary structure when the concrete is poured.

A base for a manhole or catch basin structure having an embedded plastic canal-bed liner and a corresponding blocking member or hood. The plastic liner has an annular, outwardly extending flange which becomes embedded in a sidewall of the base to form a unitary structure when the concrete is poured. The liner is not subject to delamination from the canal-bed and includes bosses for additional anchoring to the base. The canal-bed liner and hood serve to protect the concrete base and sidewalls of the manhole or catch basin from corrosive fluids, thus extending the useful life of the manhole structure. The hood may be secured to the sidewalls of the structure or may be engaged and sealed to a rim of the liner.

대표청구항 ▼

[ What is claimed is:] [1.]1. A caustic fluid blocking device for use in a manhole or catch basin structure having a base and concrete sidewalls, said blocking device comprising:a containment member having an upper and lower surface and an outer perimeter edge conforming to a shape of the concrete s

[ What is claimed is:] [1.]1. A caustic fluid blocking device for use in a manhole or catch basin structure having a base and concrete sidewalls, said blocking device comprising:a containment member having an upper and lower surface and an outer perimeter edge conforming to a shape of the concrete sidewalls and adapted to engage said sidewall wherein said lower surface faces the base and deflects caustic fluids towards a bottom of the base, wherein said containment member is aligned and engaged to said sidewall within the base.