Patent ID: 8679329

Claim:
A filter system in combination with a storm water sewer having an inlet defined by openings within a removable grate supported by an internal ledge of a surrounding grate frame, said filter system comprising a horizontal substantially flat mount frame supported by said ledge and including inner support wires around said frame, a fabricated tapered outer wire basket positioned below said mount frame and having crossing wires welded together to form a tapering annular side wall defining openings providing for a flow of storm water received from said openings in said grate through said basket, a porous flexible filter material lining said annular side wall of said outer wire basket and covering said openings within said basket, an upper portion of said outer wire basket including wire hook portions hooked onto said inner support wires of said mount frame and supporting said outer wire basket from said mount frame in suspended relation, said filter material having an upper peripheral portion attached to said upper portion of said outer wire basket and positioned to receive storm water and sediment flowing through said openings within said grate, a fabricated tapered inner wire basket substantially smaller than said outer wire basket and positioned within a lower portion of said outer wire basket, said inner wire basket having crossing wires welded together to form a tapering annular side wall defining openings and including handle members extending within said outer wire basket, a porous flexible filter material lining said annular side wall of said inner wire basket and covering said openings within said inner wire basket, and said inner wire basket being removable from said outer wire basket by lifting said inner wire basket with said handle members and through said grate frame after said grate is removed from said grate frame to provide for conveniently dumping sediment collected within said inner wire basket and for reusing said inner wire basket within said outer wire basket.