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. 12, 1993
Filed:
Apr. 10, 1992
Applicant:
Inventors:
James W Emrick, Toledo, OH (US);
Bruno A Rosa, Toledo, OH (US);
Assignee:
AP Parts Manufacturing Co., , OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
181282 ;
Abstract
An exhaust muffler is provided with first and second internal plates formed to define an array of tubes and a reversing chamber. A pair of external shells are engaged to the internal plates and define one or more chambers surrounding the tubes defined by the internal plates. A pipe extends across the reversing chamber defined by the internal plates and to the outlet. A portion of the pipe may be perforated to enable expansion of exhaust gas into a high frequency tuning chamber.