Liquid purification or separation – Filter – With residue removing means or agitation of liquid
Patent
1997-07-31
1999-03-09
Lithgow, Thomas M.
Liquid purification or separation
Filter
With residue removing means or agitation of liquid
210108, 210111, 210113, 210406, 210304, 210312, 210313, 210258, 210259, 210123, 210436, 2105121, 55337, 55432, 96233, 433 92, 433 97, B01D 2966, B01D 2968, B01D 3600, A61C 1706
Patent
active
058795529
ABSTRACT:
A self-purifying filter apparatus comprising (1) a filter having a first surface and a second surface; (2) flow control means, such as a vacuum pump, for causing a stream of fluid interspersed with solid particulates to pass from the first surface to the second surface through the filter, thereby removing some of the solid particulates from the first stream of fluid and depositing them on the first surface; and (3) a purging device, such as a small reservoir of water (potentially formed, in part, by water previously filtered by the filter), for causing a second stream of fluid to pass from the second surface to the first surface through the filter without substantially changing the position of the filter, thereby rinsing and removing from the first surface at least some of the solid particulates that were deposited there.
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