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:
Mar. 21, 1978
Filed:
Jun. 10, 1976
David Marshall Prather, Columbus, IN (US);
Graham Frederick Thieman, Columbus, IN (US);
Arvin Industries, Inc., Columbus, IN (US);
Abstract
A muffler which does not require a low-frequency Helmholtz resonator includes an outer shell and first and second heads for closing the inlet and outlet ends, respectively, of the shell. First, second and third baffles are disposed internally of the shell and extend transversely therein. An outlet end chamber is defined between the inlet head and first baffle. A second chamber is defined between the first and second baffles. A third chamber is defined between the second and third baffles. An inlet end chamber is defined between the third baffle and outlet head. An inlet conducting tube extends longitudinally of the shell through the inlet head and the first, second and third baffles and opens into the inlet end chamber. An outlet conducting tube extends through the outlet head and the first, second and third baffles and opens into the outlet end chamber. An aperture in the first baffle acoustically couples the outlet end chamber and second chamber. An aperture in the third baffle acoustically couples the inlet end chamber and third chamber. One or more apertures in the second baffle acoustically and resistively couple the second and third chambers.