Filtration system
OwnerNorman R. Robinsoninventor
Life of this patent
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Abstract
A liquid filter system capable of removing particles as small as one micron or less employing a novel electro-mechanical design in which layers of a fibrous filter media are alternated with electrically conductive porous sheets such as stainless steel screens. The conductive sheets are connected to a source of D.C. electrical power so that the sheets alternate in polarity to establish a uniform electromagnetic field throughout the porous filter media. The filter system is adapted for automatic backwashing cleaning and regeneration. A novel shuttle valve assembly is incorporated in the system for backwash of the filter media. In addition, means are provided for selective compression of the filter media during the filter cycle with decompression and expansion of the filter media being achieved during the backwash cycle.
Claims6
Filter apparatus capable of removing particles as small as one micron or less from a liquid passing through the filter, said apparatus comprising
- a plurality of superimposed layers of fibrous filter media;
- a plurality of electrically conductive porous sheets with the electrically conductive porous sheets alternating with the layers of fibrous filter media so that adjacent layers of the superimposed filter media have an electrically conductive porous sheet positioned therebetween;
- means for connecting a source of direct current voltage to the electrically conductive porous sheets so that the sheets in the superimposed filter media alternate in polarity;
- means for directing a flow of liquid to be filtered through the superimposed filter media;
- means for directing a flow of backwash fluid through the superimposed filter media in reverse flow to backwash the filter media;
- means for selectively compressing the filter media as the flow of liquid to be filtered passes through the filter media;
- and
- means for decompressing and expanding the filter media as the flow of backwash fluid passes through the filter media during backwash of the filter.
Dependencies are inferred from the claim text.