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:
Oct. 22, 1991
Filed:
Jan. 24, 1990
Barry O Christenson, Fargo, ND (US);
Albert H Mayfield, Lennon, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A low restriction exhaust treatment apparatus having a hollow outer shell into which a means for treating exhaust gas emitted from an internal combustion engine is disposed, end portions disposed at each end of the outer shell to sealingly close the inner portion of the shell, and end tubes inserted into apertures formed in the sealing end portions for facilitating exhaust flow into and out of the apparatus. The end tubes each have a plurality of axially extending, radially inwardly angled serrations formed about one end thereof to form a lead-in portion of a reduced diameter for ease of insertion of the tubes into the apertures of the end portions without creation of undesirable exhaust system back pressure.