Multiple hot zone igniters
AssigneeSaint-Gobain Ceramics & Plastics, Inc.
InventorsCraig A. Willkens, Normand P. Arsenault, Sebastien R. Bardon
Life of this patent
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Abstract
The present invention relates to ceramic igniter devices, and more particularly, to such devices that contain two or more segregated hot zone regions that are electrically connected such as in series or in parallel. These devices are suitably incorporated in a variety of devices, including diesel fuel filters.
Claims46
A sintered ceramic igniter element comprising a plurality of hot zone regions, at least two of the regions thermally segregated with respect to each other whereby the two segregated hot zone regions reach an operational temperature of at least about 200° C. higher than adjoining conductive or insulator regions,
- and a conductive zone interposed between adjacent hot zone regions.
A diesel filter assembly comprising:
- a filter;
- a sintered ceramic igniter element comprising a plurality of hot zone regions, at least two of the regions thermally segregated with respect to each other;
- the element attached to the filter.
A sintered ceramic igniter element comprising a plurality of hot zone regions, at least two of the regions being thermally segregated with respect to each other,
- each hot zone comprising 50-70 v/o electrically insulating material, 10-45 v/o of a semiconductive material, and 6-16 v/o of a conductive material.
A sintered ceramic igniter element comprising a plurality of hot zone regions, at least two of the regions being thermally segregated with respect to each other,
- wherein the element comprises a cold zone comprising from about 15 to 50 v/o of an insulator material, 0 to 50 v/o of a semiconductive material, and 20 to 70 v/o of a metallic conductive material.
A cooking apparatus that contains a gas burner, the apparatus comprising a unitary sintered ceramic igniter element comprising a plurality of hot zone regions, at least two of the regions thermally segregated with respect to each other, whereby the two segregated hot zone regions reach an operational temperature of at least about 200° C. higher than adjoining conductive or insulator regions.
A sintered ceramic igniter element comprising a plurality of hot zone regions, at least two hot zone regions thermally segregated with respect to each other whereby the two segregated hot zone regions reach an operational temperature of at least about 200° C. higher than adjoining conductive or insulator regions,
- and the two segregated hot zone regions proximate to a common conductive zone region.
A sintered ceramic igniter element comprising four or more hot zone regions, at least two of the hot zone regions thermally segregated with respect to each other.
Dependencies are inferred from the claim text.