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US 5,259,190 AGranted
Heated cellular structures
AssigneeCorning Incorporated
InventorsRodney D. Bagley, G. Daniel Lipp
Life of this patent
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AssigneeCorning Incorporated
InventorsRodney D. Bagley, G. Daniel Lipp
Estimating the term…
An electrically conductive cellular or honeycomb structure wherein the structure is heated to light off exhaust gases and/or to burn off deposited carbon particulates and thus periodically regenerate the structure. Electrodes attached to the surface of the structure or body pass electrical currents through the body, the currents causing temperature increase by resistance heating. The electrodes are radially or angularly spaced around the outer surface of the structure, near its input end face to thereby achieve a uniform temperature distribution at the input end face for quick light-off and/or for more complete combustion of the carbon particulates. This temperature distribution can also be made more uniform by the distribution of plugs of varying thickness and/or resistivity in selected areas of the input end face of the structure. The structure can be of the porous wall type wherein alternate passageways are plugged at the front and rear faces. The structure may be also formed of an aluminum iron alloy.
A device for removal of pollutants from exhaust gases comprising:
An electrically heated device for catalytic conversion of exhaust gases comprising a catalytically active honeycomb structure having inlet and outlet end faces, a matrix of thin walls defining a plurality of cells extending longitudinally and mutually parallel therethrough between said inlet and outlet end faces, and at least three electrodes spaced around the outer surface and near the inlet end face of said structure.
A regenerating filter construction for periodically regenerating a filter by burning off collected particulates which accumulate therein, the filter being an electrically conductive honeycomb structure having a matrix of thin porous walls defining a plurality of cells extending longitudinally and mutually parallel therethrough between inlet and outlet end faces of the filter, the walls having substantially uniform interconnected open porosity of a volume and size sufficient to enable the fumes to flow completely through the walls and to restrain substantially all of the particulates from passing completely through the walls, an inlet group of the cells open at the inlet end face and closed adjacent to the outlet end face, an outlet group of the cells closed adjacent to the inlet end face and open at the outlet end face, each cell of the inlet group sharing cell walls with cells of the outlet group, each cell of the outlet group sharing cell walls with cells of the inlet group, at least three electrodes angularly spaced around the outer surface of the filter, adjacent to the filter inlet face, and secured to said outer surface, whereby electrical currents can be passed through the filter from selected pairs of said electrodes to thereby heat the filter and burn off the collected particulates.
The filter construction of claim 9, wherein the cells o the filter are of a density in the range of 1-93 cells/cm.sup.2.
Dependencies are inferred from the claim text.