Protector for sewer system inlet
AssigneeBMP Supplies Inc.
InventorJim Lindemulder
Life of this patent
Estimating the term…
Abstract
A protector for the inlet into a sewer system includes a straight or annular, porous tubular casing for placing on or around the periphery of a sewer grate; a skirt extending inwardly or outwardly from the bottom of the casing for overlapping the side edges of a sewer opening so the grate retains the protector in the use position; and a filler in the casing for maintaining the casing in an expanded condition, at least one of the casing, the skirt and the filler being permeable to water and impermeable to contaminants, whereby water can flow into the system while contaminants are blocked.
Claims6
A protector for an inlet to a sewer system, which includes a grate over an opening into the system, comprising an annular, closed, porous, tubular casing for placing on the grate over the opening;
- a skirt connected to and extending radially outwardly from a bottom side edge of said casing for wrapping around side edges of the grate and for retaining the protector in position when the grate is placed over the opening to engage the skirt;
- and a filler in the casing for maintaining the top of the casing in an expanded condition so that the casing can act as a barrier, at least one of the casing, the skirt and the filler being permeable to water and impermeable to silt, oil, tar and other contaminants, whereby the protector permits the flow of water while blocking the flow of contaminants into a sewer.
Dependencies are inferred from the claim text.