Cover for a pressurized sand filter

Description

FIG. 1 is a top perspective view of a cover for pressurized vessels showing my new designs;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a top plan view thereof, on a reduced scale; and,

FIG. 5 is a side view thereof, all sides being identical, on a reduced scale.