Liquid purification or separation – Flow – fluid pressure or material level – responsive – Diverse sensing means
Patent
1996-01-24
1996-10-01
Walker, W. L.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Diverse sensing means
210106, 210121, 210356, 210409, 2104161, 210437, 210452, 137 41, 137547, B01D 3352
Patent
active
055608205
ABSTRACT:
A self-cleaning fluid filtration system is presented and which includes a tank having a bottom wall and a side wall together forming a fluid chamber. An inlet is located in the bottom wall for receiving fluid to be filtered. A tube extends from the inlet upwardly into the chamber for directing fluid upwardly through the tube. The tube has perforations therein for directing fluid to flow outwardly therefrom. A platform is carried by the tube intermediate its ends and extends radially outward therefrom toward the side wall of the tank. A perforated rigid basket in the chamber surrounds the tube and has an open lower end mounted to the upper surface of the platform and a closed upper end located above the upper end of the tube. A collapsible fluid-permeable filter bag is located in the chamber intermediate the tube and the basket. The filter bag has an uncollapsed condition while fluid flows through the tube and a collapsed condition when fluid flow terminates whereupon the bag collapses causing dirt clinging to the inner surface of the filter bag to fall from the walls thereof by gravity forces.
REFERENCES:
patent: 1696313 (1928-12-01), Liddell
patent: 2724508 (1955-11-01), Luther
patent: 3276594 (1966-10-01), Gwilliam
patent: 3334748 (1967-08-01), Bozek
patent: 3542200 (1970-11-01), Durr
patent: 4937005 (1990-06-01), Shelstad
patent: 5143615 (1992-09-01), Roy et al.
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