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US 4,604,205 AGranted
Water removing filter media
AssigneeCentral Illinois Manufacturing Company
InventorWilliam R. Ayers
Life of this patent
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Abstract
A filter media for use in a filter employed to separate water and particulate material from a liquid to be purified, such as a hydrocarbon fuel. The filter media includes a porous material such as glass fiber having a density sufficient to provide the desired mechanical filtration and which carries a water insoluble, water-absorbing material as, for example, a starch-polyacrylonitrile graft copolymer. Also disclosed is a filter employing the media and a method of making the media.
Claims1
A water absorbing, mechanical filter comprising:
- a filter housing;
- an inlet port in said housing;
- an outlet port in said housing;
- said housing further including means defining a liquid flowpath from said inlet port to said outlet port;
- a body of fibrous material within said housing and extending across said flowpath;
- and
- a quantity of starch-polyacrylonitrile graft copolymer dispersed throughout and fixed to said body, the distribution of the graft copolymer within said body being greater nearer said outlet port than said inlet port.
4 more elements
Dependencies are inferred from the claim text.