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:
Feb. 22, 2011
Filed:
Apr. 09, 2009
Jan Krüger, Neuhausen, DE;
Frank Castor, Stuttgart, DE;
Manfred Müller, Baltmannsweiler, DE;
Georg Wirth, Kirchheim/Teck, DE;
Jan Krüger, Neuhausen, DE;
Frank Castor, Stuttgart, DE;
Manfred Müller, Baltmannsweiler, DE;
Georg Wirth, Kirchheim/Teck, DE;
J. Eberspaecher GmbH & Co. KG, Esslingen, DE;
Abstract
The present invention to an active muffler for an exhaust gas system of an internal combustion engine, in particular in a motor vehicle, includes a multi-shell housing having a pot-shaped top shell and a pot-shaped bottom shell, a funnel-shaped sound conducting body, which is inserted into the bottom shell and has a connection passing through the bottom shell and out of the housing, a loudspeaker, which is situated in the top shell and is attached to a flange section of the sound conducting body at a distance from the connection, such that a free inside cross section of the sound conducting body surrounded by the flange section is closed with an airtight seal, and a bypass through which an interior space of the top shell is connected to an interior space of the bottom shell so they communicate.