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US 5,250,094 AGranted
Ceramic filter construction and method
AssigneeDonaldson Company, Inc.
InventorsH. Young Chung, Keh B. Dema, Marty A. Barris
Life of this patent
Estimating the term…
Abstract
A ceramic fiber filter media is provided which includes ceramic fiber material and an effective amount of fluid fiber material. Preferably the media also contains therein thermoconductive fiber component. Embodiments are illustrated wherein the ceramic fiber filter media is incorporated into a preferred filter element. Particulate trap systems corporating such filter elements therein are described.
Claims13
A filter element comprising:
- (a) a longitudinal extension of pleated fiber media including, by weight % of total fiber material present:
- (i) 50-98% ceramic fiber material;
- (ii) 10-50% glass fiber material;
- and,
- (iii) 2-50% metallic fiber material having a thermoconductivity of at least 5.0 Btu/ft hr .degree.F.;
- (b) said ceramic fiber material, said glass fiber material and said metallic fiber material being mixed together in said pleated fiber media such that individual fibers of said ceramic fiber material, said glass fiber material and said metallic fiber material are dispersed throughout said fiber media;
- and,
- (c) said longitudinal extension of flexible fiber media comprising a cylindrical extension having external and internal surfaces and comprising a plurality of longitudinal pleats defining an internal flow passageway.
5 more elements
An exhaust system particulate trap assembly for filtering exhaust gas from a diesel engine;
- said assembly including:
- (a) a filter element comprising:
- (i) a longitudinal extension of pleated fiber media including, by weight % of total fiber material present:
- 50-98% ceramic fiber material;
- 10-50% glass fiber material;
- and, 2-50% metallic fiber material having a thermoconductivity of at least 5.0 Btu/ft hr .degree.F.;
- (ii) said ceramic fiber material, said glass fiber material and said metallic fiber material being mixed together in said pleated fiber media such that individual fibers of said ceramic fiber material, said glass fiber material and said metallic fiber material are dispersed throughout said fiber media;
- and,
- (iii) said longitudinal extension of flexible fiber media comprising a cylindrical extension having external and internal surfaces and comprising a plurality of longitudinal pleats defining an internal flow passageway;
- and,
- (b) means for directing exhaust gas flow through said filter element.
8 more elements
A filter element comprising:
- (a) an extension of pleated fiber filter media comprising by weight of total fiber material present:
- (i) 50-98% ceramic fiber material;
- (ii) 10-50% glass fiber material;
- and,
- (iii) 2-50% metallic fiber material;
- (b) said ceramic fiber material, said glass fiber material and said metallic fiber material being mixed together in said pleated fiber media such that individual fibers of said ceramic fiber material, said glass fiber material and said metallic fiber material are dispersed throughout said fiber media.
3 more elements
Dependencies are inferred from the claim text.