Gas separation – Two or more separators – Plies or layers of different characteristics or orientation
Patent
1996-07-31
1998-06-09
Smith, Duane S.
Gas separation
Two or more separators
Plies or layers of different characteristics or orientation
55487, 55498, 55502, 55510, B01D 4610
Patent
active
057626693
ABSTRACT:
A filter construction includes a cylindrical pleated filter construction embedded in, and extending between, first and second end caps; and an inner liner positioned downstream from the cylindrical pleated filter. At least two regions of media are positioned upstream from the cylindrical pleated filter construction. The first region of media includes an upstream, region of media including a fibrous media having a percent solidity, within the filter construction, of no greater than about 3%. The second region of media is positioned downstream from the first region of media, and is upstream from the cylindrical pleated filter construction. The second region of media includes a material having, within the filter construction, a different efficiency of filtering than the first region of media.
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Dudrey Denis J.
Herman John T.
Kahlbaugh Brad E.
Reinhart Susan B.
Donaldson & Company, Inc.
Smith Duane S.
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