Liquid purification or separation – Filter – Movable medium
Patent
1983-08-04
1986-11-11
Fisher, Richard V.
Liquid purification or separation
Filter
Movable medium
210406, 210411, 210427, 74813C, B01D 3308
Patent
active
046221450
ABSTRACT:
A drum filter is disclosed mounted vertically within a tank which receives the liquid to be filtered. The drum is provided with inside and outside filter media layers and intermediate axially extending passages receiving filtered liquid flow, which is collected in a central tube extending vertically upward and adapted to be connected to a suction pump.
A backwash arrangement includes a backwash flow passage directing flow successively through each of the axial passages as the drum is incrementally rotated about its axis.
Collection troughs are positioned extending axially along the inside and outside periphery of the drum member so as to receive the backwashing flow and contaminants, with a flushing flow carrying off the contaminants from the tank for secondary filtration.
The rotary indexing drive consists of a cylinder actuated ratchet drive with a sprocket wheel in engagement with a chain track located about the interior diameter of the drum member at its upper end.
A surrounding shroud extends about the periphery of the drum member in some embodiments which ensures that the filter media layers are covered with liquid even if the liquid level in the tank declines below the level of the upper section of the media layers.
REFERENCES:
patent: 3724248 (1973-04-01), Obermann
patent: 3745856 (1973-07-01), Aaron et al.
patent: 3868091 (1975-02-01), Hoffman
patent: 4066554 (1978-01-01), Guyer
patent: 4222291 (1980-09-01), Murphy, Jr.
patent: 4273655 (1981-06-01), Reid
patent: 4372181 (1983-02-01), Tinsley
patent: 4407720 (1983-10-01), Bratten
patent: 4480510 (1984-11-01), Aparicio, Jr. et al.
Benefiel John R.
Fisher Richard V.
Millard Wanda L.
LandOfFree
Drum filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drum filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drum filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-375914