Liquid purification or separation – Filter – Movable medium
Patent
1998-12-23
2000-08-01
Lithgow, Thomas M.
Liquid purification or separation
Filter
Movable medium
210396, 210456, 210122, 210401, B01D 3304, B01D 2909
Patent
active
060953438
ABSTRACT:
A gravity liquid filtration apparatus includes a housing with a pool forming assembly mounted between a pair of side walls in the housing. The pool forming assembly includes a central shaft with a pair of spaced-apart discs rotatably mounted on the shaft between the side walls. A filter media is supported on an endless loop carrier belt, and pressed against the peripheral edges of the containment discs along bottom arcs thereof to form a generally semi-cylindrical shaped pool. A liquid inflow assembly on the housing includes a delivery head with a nozzle portion having an elongated mouth aimed downwardly to discharge liquid onto a downwardly sloped portion of the filter media. A box is formed in the delivery head above the nozzle of a size to permit large objects such as pens and pencils to fall flat and be discharged through the mouth of the nozzle. Each disc in the pool forming assembly includes a groove along the peripheral edge with a resilient seal ring journaled in the groove to provide a seal against the filter media and carrier belt. Each disc includes a plurality of overflow apertures formed therein and located along a circle centered on the shaft. Pusher bar assemblies are mounted between the discs for pushing caked particulate off of the upper surface of the belt. A tensioner assembly supports each end of the shaft in the side walls, and includes a spring biased set collar which receives one end of the shaft to permit vertical movement of the shaft, but prevents horizontal and rotational movement of the shaft. The set collar is spring biased to maintain a biasing force of the discs against the filter media.
REFERENCES:
patent: 620786 (1899-03-01), Koerper et al.
patent: 3756411 (1973-09-01), Kracklauer
patent: 4057437 (1977-11-01), Kracklauer
patent: 4681679 (1987-07-01), Reber
patent: 4686042 (1987-08-01), Eckardt
patent: 4973407 (1990-11-01), Wagner
patent: 5238565 (1993-08-01), Barcomb et al.
Bell, III Caleb N.
Dooley, Jr. John P.
Hood, Sr. John D.
Kiely Harry A.
Moore Cecelia D.
Lithgow Thomas M.
Thomte Dennis L.
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