Gravity liquid filtration apparatus

A gravity liquid filtration apparatus, comprising:

• a housing having forward and rearward ends, opposing vertical side walls, and upper and lower ends;
• a pool forming assembly operably mounted between the side walls, including:
• a central shaft extending generally horizontally between the side walls;
• a pair of spaced-apart containment discs rotatably mounted on said shaft, said containment discs each having a peripheral edge and a plurality of overflow apertures formed therethrough and located generally along a circle centered on the shaft;
• an elongated filter medium for filtering particulate from liquid passing through the filter medium;
• an elongated filter medium carrier belt for supporting said filter medium and for pressing it against the peripheral edges of the containment discs along corresponding bottom arcs thereof;
• said carrier belt formed of an endless belt and a plurality of rollers which support the endless belt such that a run thereof is pressed towards the bottom arcs of the containment discs;
• drive means for driving the carrier belt;
• and
• a liquid inflow assembly on said housing including:
• a delivery head having a nozzle portion extending between and radially inwardly of the peripheries of the discs;
• said nozzle portion having an elongated mouth which is aimed downwardly so as to discharge liquid to be filtered onto a downwardly sloped portion of the filter medium supported on the carrier belt;
• said nozzle portion including an upper chamber having a generally horizontal bottom wall, the upper chamber connected to the mouth by an arcuate chamber;
• a vertically oriented inlet tube through which inflow liquid is discharged into the delivery head;
• said delivery head including a box having an open upper end communicating with the inlet tube and an open lower end communicating with the upper chamber of the nozzle portion, the box having a transverse width greater than a diameter of the inlet tube and extending towards the side walls, and a height of at least about six inches.

A gravity liquid filtration apparatus, comprising:

• a housing having forward and rearward ends, opposing vertical side walls, and upper and lower ends;
• a pool forming assembly operably mounted between the side walls, including:
• a central shaft extending generally horizontally between the side walls;
• a pair of spaced-apart containment discs rotatably mounted on said shaft, said containment discs each having a peripheral edge and a plurality of overflow apertures formed therethrough and located generally along a circle centered on the shaft;
• an elongated filter medium for filtering particulate from liquid passing through the filter medium;
• an elongated filter medium carrier belt for supporting said filter medium and for pressing it against the peripheral edges of the containment discs along corresponding bottom arcs thereof;
• said carrier belt formed of an endless belt and a plurality of rollers which support the endless belt such that a run thereof is pressed towards the bottom arcs of the containment discs;
• drive means for driving the carrier belt;
• and
• a liquid inflow assembly on said housing including:
• a delivery head having a nozzle portion extending between and radially inwardly of the peripheries of the discs;
• said nozzle portion having an elongated mouth which is aimed downwardly so as to discharge liquid to be filtered onto a downwardly sloped portion of the filter media supported on the carrier belt;
• and
• a pusher bar assembly mounted between the discs, including:
• a spacer bar extending between the discs, spaced radially inwardly of the peripheral edges, for movement with the rotation of the discs;
• a pair of spaced-apart, parallel support arms pivotally mounted at first ends on the spacer bar;
• and
• a shovel bar mounted on second ends of the support arms and oriented parallel to the spacer bar, which can contact a run of the filter medium on the carrier belt along the bottom arcs of the discs.

A gravity liquid filtration apparatus, comprising:

• a housing having forward and rearward ends, opposing vertical side walls, and upper and lower ends;
• a pool forming assembly operably mounted between the side walls, including:
• a central shaft extending generally horizontally between the side walls;
• a pair of spaced-apart containment discs rotatably mounted on said shaft, said containment discs each having a peripheral edge and a plurality of overflow apertures formed therethrough and located generally along a circle centered on the shaft;
• an elongated filter medium for filtering particulate from liquid passing through the filter medium;
• an elongated filter medium carrier belt for supporting said filter medium and for pressing it against the peripheral edges of the containment discs along corresponding bottom arcs thereof;
• said carrier belt formed of an endless belt and a plurality of rollers which support the endless belt such that a run thereof is pressed towards the bottom arcs of the containment discs;
• drive means for driving the carrier belt;
• and
• a liquid inflow assembly on said housing including:
• a delivery head having a nozzle portion extending between and radially inwardly of the peripheries of the discs;
• said nozzle portion having an elongated mouth which is aimed downwardly so as to discharge liquid to be filtered onto a downwardly sloped portion of the filter media supported on the carrier belt;
• and
• a tensioner assembly connected between each end of the shaft and the associated side wall, for biasing the shaft vertically downwardly while preventing horizontal, longitudinal, and rotational movement of the shaft.