Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Patent
1992-11-02
1993-09-28
Dawson, Robert A.
Liquid purification or separation
Recirculation
Serially connected distinct treating or storage units
2102571, 210288, 210289, 210134, 210136, B01D 2418
Patent
active
052484173
ABSTRACT:
Double flow-through filtration apparatus requiring the bulk of the water to be treated to twice flow through filtering media contained within a filter housing. The housing includes an inlet port for receiving water from a source; a combination port for water flow to and from a storage tank and an outlet port which may lead to a water tap. Untreated water from a source flows into the filter housing through the inlet port. A cup type check valve prevents flow directly to the storage tank, forcing the water through the filter media for a first treatment. A filter tube, extending through the media, in cooperation with a check valve of the slip type, permits once treated water to flow to a storage tank and prevents backflow into the tube. Once the water tap is opened, the once treated water flows form the storage tank, through the combination port, by the cup valve, and through the filter media a second time before exiting the outlet port of the housing and the tap.
REFERENCES:
patent: 3542199 (1970-11-01), Bray
patent: 3654148 (1972-04-01), Bradley
patent: 3734295 (1973-05-01), Smith
patent: 3753495 (1973-08-01), Bjork
patent: 4804465 (1989-02-01), Brown
patent: 4882061 (1989-11-01), Petrucci et al.
patent: 5017286 (1991-05-01), Heiligman
patent: 5082557 (1992-01-01), Grayson et al.
Dawson Robert A.
Fortuna Ana M.
Horton Paul F.
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