Minnesota Mining and Manufacturing Company

Mark P Smith

Richard L Bloom

Ryan C Shirk

Troy K Ista

Joel H Sabean

William T Fay

Thomas J Conway

An electrically regenerable diesel particulate filter cartridge and filter comprising an electrically, variably resistive sheet(s) or tube which, when energized, provide sufficient heat to burn off soot particulates entrapped in the filter media.

Electrically regenerable diesel particulate filter cartridge and filter

An electrically regenerable diesel particulate filter cartridge and filter comprising a slotted electrically resistive tube which, when energized, heats the filter media to a temperature sufficient to allow the trapped soot particulates to burn.

An electrically regenerable diesel particulate trap or filter comprising an electrically resistive expanded metal sheet or sleeve which when energized heats the filter element to a temperature sufficient to allow the trapped soot particulates to burn.

Electrically regenerable diesel particulate trap

An efficient, economical, compact diesel particulate trap has a plurality of perforated hollow tubes, on each of which a heat-resistant yarn is helically cross-wound to provide a plurality of layers that function as a filtering element. The yarn, which preferably is a continuous-filament ceramic yarn, has a core from which filaments or fiber segments project outwardly and intermesh with fiber segments of laterally spaced cores to provide traps. The cores of yarn convolutions of at least one layer are laterally offset from the cores of convolutions of an adjacent layer to deflect into tortuous paths gases flowing generally radially through the filtering element.

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Lino Lakes, MN, United States of America

Mark P Smith