Patent ID: 6258268
Filing Date: 2001-07-10
Classification: B01D

Abstract:
In a rectangular container filter box of the type used for separating solid materials from liquid and having an outer shell constructed of a liquid-impervious material and defining a pair of upstanding side and end walls, a bottom wall and an open upper end, and an inner shell disposed within said outer shell and defining a pair of upstanding side and end walls, a bottom wall and an open upper end, said walls having perforations therein to allow the passage of liquid and small solids therethrough, and a frame assembly for supporting said inner shell within said outer shell such that said inner shell is spaced from said outer shell so as to define a liquid material collection area therebetween, and a door at one end of said filter box comprising proximately spaced end walls of the inner end outer shells, the improvement comprising:at least one opening in said bottom wall of said inner shell proximate the opposite end of said inner shell from said door and communicating with the material collection area, a hatch plate mounted on said bottom wall of said inner shell over each such opening and movable between an open position and a closed position, each such hatch plate comprising a support frame and a perforated sheet of material carried by and spanning said support frame Such that in said open position, said hatch plate provides unobstructed access to said liquid material collection area through said opening and in said closed position covers said opening and is substantially coplanar with said bottom wall of said inner shell so as to define a substantially uninterrupted continuation of the perforated bottom wall of said shell and allow the passage of liquid and small solids therethrough whereby upon moving said hatch plate to the open position and moving the end door of the filter box to the open position, one can direct pressurized water flow through the length of said material collection area for a thorough flushing of material therefrom.