Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1974-01-17
1976-01-06
Spear, Jr., Frank A.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
210123, 210143, 210151, 210257, 73224, B01D 2324, B01D 2320, G01F 324
Patent
active
039310094
ABSTRACT:
A water purification apparatus is disclosed having an aeration chamber for aerating unpurified water from a source. A filter chamber is provided beneath the aeration chamber containing granular media for filtering the aerated water and having spaced apart headers for introducing backwash water as well as removing filtered water for storage in a reservoir beneath the filter chamber. A float actuated valve controls the flow of filtered water from the header to the reservoir in response to the water level of aerated water in the filter chamber. A float actuated timing device is provided for controlling the introduction of backwash water to the headers for a predetermined duration in response to the frequency the reservoir has been filled and emptied of purified water.
REFERENCES:
patent: 1556186 (1925-10-01), Wall
patent: 3021276 (1962-02-01), Mast
patent: 3347379 (1967-10-01), Miller
patent: 3350937 (1967-11-01), Brewer
patent: 3682307 (1972-08-01), Cook et al.
Lander Ferris H.
Spear, Jr. Frank A.
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