CORE ELEMENT FOR CATALYTIC CONVERTER
 Inventor: David T. Shelter, Garrettsville, Ohio
 Assignee: W. R. Grace & Co.-Conn., New York, N.Y.
 Appl. No.: 886,009
 Filed: May 20,1992
 Int. CI.' F01N 3/28
 U.S. CI 60/300; 60/303;
 Field of Search 60/300, 303; 422/174,
 References Cited
U.S. PATENT DOCUMENTS
5,118,475 6/1992 Cornelison 60/300
Primary Examiner—Douglas Hart
Attorney, Agent, or Firm—Edward J. Cabic
[ii] Patent Number: 5,272,876  Date of Patent: Dec. 28, 1993
There is provided a novel and improved core element for a catalytic converter characterized in that the core element has a corrugated thin metal strip with bent tab members at each end, such tab members being in two portions. These two portion sandwich the ends of the corrugated thin metal strip therebetween and provide a convenient means for welding the ends of the corrugated thin metal strip to the tab members. A plurality of such corrugated strips with the tab members attached are tightly spirally wound about a central post or pin and the tab members are dimensioned to overlap and ultimately define a shell segment. The shell segments define a core which is encased in a suitable housing to form a catalytic converter which may be electrically heatable. An electrically heatable catalytic converter is especially useful to remove pollutants from internal combustion engine exhaust gas.
23 Claims, 4 Drawing Sheets