Patent ID: 7686961

Claim:
A self-retaining trap adapted to be mounted in a drain pipe of an attached catch basin, for minimizing the flow of pollutants floating on the surface of wastewater within said catch basin into said drain pipe, said drain pipe having an internal diameter, said trap comprising: a longitudinal cylindrical member adapted to be sealingly inserted into said drain pipe in said catch basin; said longitudinal cylindrical member having an external diameter smaller than said internal diameter of said drain pipe and having at least one integral sealing fin extending beyond said external diameter for sealingly engaging said drain pipe, creating a watertight seal and retaining said trap in said drain pipe; and an opening positioned in said trap such that when said trap is mounted in said drain pipe, said opening is submerged below said surface of said wastewater for providing fluid communication from said catch basin to said drain pipe through said longitudinal member, said cylindrical member being connected to an arcuate rear wall of said trap, said rear wall having an arc approximately corresponding to that of a wall of said catch basin and being located proximate said wall of said catch basin.