The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 1982
Filed:
May. 12, 1980
Applicant:
Inventors:
Hal H Rice, Birmingham, MI (US);
Gary A Kruger, Troy, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N / ; F01N / ; F01N / ;
U.S. Cl.
CPC ...
60272 ; 60282 ; 1231 / ; 138145 ; 138149 ; 428 36 ; 428428 ;
Abstract
An insulating liner for use in an exhaust port of an internal combustion engine or the like consisting, in a preferred embodiment, of a formed thin wall tubular body of rigidized fibrous ceramic such as fibrous alumina-silica material (Fiberfrax) with an abrasion resistant ceramic coating fused onto the inner gas-exposed surface of the body. The coating comprises a mixture of fused silica cement and fine glass frit sintered in place on the body inner surface at a temperature below that which would damage the thin walls of the body.