Patent ID: 7615148

Claim:
A filter assembly for a seawall having a seaward side, a landward side, and a hole communicating between the sides for allowing groundwater to flow from the landward side to the seaward side, the filter assembly comprising: (a) a housing comprising a flat flange and a perforated conical shell, the shell having a base and an apex, the shell adapted to extend into the hole with its apex extending toward the landward side, the flange having a seaward side adapted to fit flushly against the seawall, the flange having a landward side connected to the shell, the flange having an opening that defines an open base for the shell; (b) a perforated conical cage having an open base that fits within the shell of the housing; (c) a conical filter element having an open base that fits within the cage; (d) a perforated conical sleeve having an open base that fits within the filter element; and (e) a perforated cap that is removably and flushly fastened to the opening in the flange to secure the cage, filter element, and sleeve within the shell of the housing.