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. 03, 2009
Filed:
Aug. 10, 2005
Applicants:
C. Raymond Cheng, Madison, WI (US);
Zakir Ahmad Quabili, Livonia, MI (US);
Larry T. Gunderson, Sun Prairie, WI (US);
Mark V. Holzmann, Stoughton, WI (US);
Inventors:
C. Raymond Cheng, Madison, WI (US);
Zakir Ahmad Quabili, Livonia, MI (US);
Larry T. Gunderson, Sun Prairie, WI (US);
Mark V. Holzmann, Stoughton, WI (US);
Assignee:
Fleetguard, Inc., Nashville, TN (US);
Primary Examiner:
Int. Cl.
CPC ...
F01N 1/02 (2006.01); E04B 1/84 (2006.01); F01N 7/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An acoustic silencer is provided by a tubular member extending along an axis and having a hollow interior defining an axial flow path therethrough. The tubular member has a sidewall with an interior face facing the hollow interior and having quarter wave resonators formed by blind holes therein.