Composite catalytic converter
First Claim
1. A core member for an electrically heatable catalytic converter comprising (a) a nonnesting corrugated thin metal foil strip having a predetermined length and a predetermined width, the length being greater than the width, and (b) at least one flat thin metal foil strip having a width substantially less than said predetermined width and in contiguous relation therewith, one longitudinal marginal edge of said flat thin metal foil strip lying along a longitudinal marginal edge of said corrugated thin metal foil strip, and substantially coextensive therewith, said foils being spirally co-wound about an electrically conducting central post.
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Accused Products
Abstract
There is provided a core element for an electrically heatable catalytic converter, and an electrically heatable catalytic converter containing the same, the core element being characterized by a corrugated thin metal foil strip, preferably herringbone corrugated, and in laminar relationship therewith, a flat thin metal foil strip of either stainless steel or brazing metal, or a combination of both, the flat thin metal foil strip having a width less than the width of the corrugated thin metal foil strip. The strips are then spirally wound, or accordion folded to form a monolith, and suitably connected to a voltage source to supply electrical power to the unit.
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Citations
27 Claims
- 1. A core member for an electrically heatable catalytic converter comprising (a) a nonnesting corrugated thin metal foil strip having a predetermined length and a predetermined width, the length being greater than the width, and (b) at least one flat thin metal foil strip having a width substantially less than said predetermined width and in contiguous relation therewith, one longitudinal marginal edge of said flat thin metal foil strip lying along a longitudinal marginal edge of said corrugated thin metal foil strip, and substantially coextensive therewith, said foils being spirally co-wound about an electrically conducting central post.
- 14. A core for an electrically heatable catalytic converter including a core member comprising (a) nonnesting corrugated thin stainless steel foil strip having a predetermined length and a predetermined width, the length being greater than the width, and (b) at least one flat thin metal foil strip having a width less than said predetermined width, and in contiguous relation therewith, one longitudinal margin edge of said flat thin metal foil strip lying along a longitudinal margin edge of said corrugated thin metal foil strip, and substantially coextensive therewith, said foils being spirally co-wound about an electrically conducting central metal post, and including a retaining shell tightly surrounding said core and being electrically bonded thereto.
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26. A core as defined in claim 26 further including a direct current voltage source having a voltage rating of from 12 to 108 volts.
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27. An electrically heatable catalytic converter for treating exhaust gas emanating from an internal combustion engine to remove pollutant materials therefrom, said converter including (1) an outer metallic shell, (2) means at each end of the shell for adapting the configuration of the outer metallic shell for insertion into a conventional exhaust system for said internal combustion engine, (3) an insulating liner for the inner walls of said outer shell, (4) a core for said converter within said insulating liner including a core member comprising (a) nonnesting corrugated thin stainless steel foil strip having a predetermined length and a predetermined width, the length being greater than the width, and (b) at least one flat thin metal foil strip having a width less than said predetermined width, and in contiguous relation therewith, one longitudinal marginal edge of said flat thin metal foil strip lying along a longitudinal marginal edge of said corrugated thin metal strip and substantially coextensive therewith, said foils being spirally co-wound about an electrically conducting central metal post, and including a retaining shell tightly surrounding said core and being electrically bonded thereto, (5) means for connecting said central post to one pole of a direct current voltage source, (6) means for connecting said retaining shell to the other pole of a direct current voltage source, and (7) a direct current voltage source rated at from 12 to 108 volts.
Specification