Liquid purification or separation – Flow – fluid pressure or material level – responsive
Patent
1995-03-31
1997-05-06
Drodge, Joseph W.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
55380, 55520, 55529, 55DIG2, 210354, 210483, 210487, B01D 3300
Patent
active
056267444
ABSTRACT:
Disclosed is a porous device adapted to remove particulates from a fluid passed through the device. The device includes a porous filtration medium. The medium has a first surface having an area which is adapted to receive the fluid for passage through the medium and a second surface from which the fluid exits the medium. The device is configured to variably increase the area of the first surface in response to a differential in fluid pressure between the first surface and the second surface so as to extend the life of the device. In some embodiments the device is adapted to retain the increase in surface area which acts as a visual indication that the device is reaching its capacity to retain particulates.
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"Comparison of Experimental and Theoretical Efficiencies of Residential Air Filters," TAPPI Journal, vol. 77, No. 9, Sep. 1994, pp. 180-186.
Drodge Joseph W.
Harps Joseph P.
Kimberly-Clark Corporation
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