High collapse pressure porous filter device

Details High collapse pressure porous filter device High collapse pressure porous filter device

1995-04-10

1997-08-12

Walker, W. L.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210490, 210492, 210496, 21049701, 2105101, B01D 2702

Patent

active

056561660

ABSTRACT:
A substantially cylindrical, unitized filter element for separating contaminant material from a flowing media includes an outer, substantially cylindrical wall portion which is fabricated by a two step process involving both a compacting step followed by a sintering step. The result of these processing steps is to create a rigid, porous filtering matrix. The filter element also includes an inner, substantially cylindrical wall portion which is also constructed through a two step process of a granular material which has been compacted and sintered into a rigid and porous filtering matrix. Disposed between the two cylindrical wall portions is a substantially cylindrical structural support member which is fabricated from a non-restrictive material and a material which is compatible with the material selected for the inner and outer wall portions. The structural support member is positioned between the two wall portions prior to the compacting process step and is sintered to the outer and inner wall portions in order to create a unitized filter element.

REFERENCES:
patent: 2665960 (1954-01-01), Causley
patent: 3693750 (1972-09-01), Takkunen
patent: 3780872 (1973-12-01), Pall
patent: 3984044 (1976-10-01), Breton et al.
patent: 4126560 (1978-11-01), Marcus et al.
patent: 4287068 (1981-09-01), Bewley
patent: 4579658 (1986-04-01), Moller
patent: 4721567 (1988-01-01), Uram
patent: 5098571 (1992-03-01), Maebashi
patent: 5202022 (1993-04-01), Ferri
patent: 5326512 (1994-07-01), Stillwagon et al.

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