Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Patent
1992-10-29
1998-03-17
Walker, W. L.
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
21049701, 210505, 210508, 55524, 55527, 55529, 156187, 156190, 264165, 428 361, B01D 3916
Patent
active
057282986
ABSTRACT:
A filter element (10) comprises a porous, thick-walled, integral, self-supporting, resin impregnated and bonded fibrous, tubular filter structure (11) having a hollow core (15); an inner shell (20) of a first large pore size porous media adjacent the hollow core and forming the majority of the filter structure; and an outer shell (21) of a second small pore size porous media, finer than the first porous media and adjacent the inner shell, the first and second porous media being resin impregnated and bonded. A method for the manufacture of a porous, thick-walled, integral, self-supporting, resin impregnated fibrous tubular filter element comprises the steps of forming a hollow inner shell of a first large pore size porous media; forming an outer shell of a second small pore size porous media, onto the inner shell, finer than the first porous media; impregnating the inner shell and the outer shell with a resin binder; and curing the resin to form an integral, self-supporting, resin impregnated and bonded fibrous, tubular filter element.
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Cuno Incorporated
Walker W. L.
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