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Class Information
Number: 181/281
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Perpendicular and/or oblique
Description: Subject matter having baffles angularly disposed relative to the axis of the flow passage, i.e., not parallel to the axis.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8424635 Firearm suppressor with relationally-rotated spacers disposed between baffles Apr. 23, 2013
8422225 Power electronic apparatuses with cooling arrangements Apr. 16, 2013
8215450 Exhaust muffler device Jul. 10, 2012
8104572 Spin muffler Jan. 31, 2012
7942240 Silencer for internal combustion engine May. 17, 2011
7942238 Marine muffler with angularly disposed internal baffle May. 17, 2011
7905322 Marine muffler with angularly disposed internal baffle Mar. 15, 2011
7766123 Vehicle exhaust system Aug. 3, 2010
7740456 Suction silencer and compressor therewith Jun. 22, 2010
7730997 Air intake noise reducing device, internal combustion engine fitted with the same and structure for fitting the same to the internal combustion engine Jun. 8, 2010
7721845 Exhaust muffler May. 25, 2010
7631725 Exhaust system Dec. 15, 2009
7581620 Marine muffler with angularly disposed internal baffle Sep. 1, 2009
7552797 Vehicular exhaust system Jun. 30, 2009
7549512 Muffler for internal combustion engine Jun. 23, 2009
7503426 Reflecting plate type silencer pipe Mar. 17, 2009
7350620 Compact silencer Apr. 1, 2008
7153107 Compressor muffler assembly Dec. 26, 2006
7086497 Induction system with low pass filter for turbo charger applications Aug. 8, 2006
6953104 Muffin fan hush hood Oct. 11, 2005
6942061 Muffler for internal combustion engine Sep. 13, 2005
6932188 Silencer for vacuum cleaner Aug. 23, 2005
6796403 Exhaust system baffling apparatus Sep. 28, 2004
6672425 Noise abatement module Jan. 6, 2004
6659222 Multi-chambered muffler Dec. 9, 2003
6609590 Exhaust system having angled baffle Aug. 26, 2003
6415888 Muffler Jul. 9, 2002
6360777 High pressure hose particularly suitable for automotive fuel delivery system Mar. 26, 2002
6241044 Exhaust silencer and communicating pipe thereof Jun. 5, 2001
6089347 Muffler with partition array Jul. 18, 2000
6024189 Noise attenuating apparatus Feb. 15, 2000
5746986 Industrial catalytic converter and combination industrial catalytic converter and silencer May. 5, 1998
5703338 Sound absorber Dec. 30, 1997
5659158 Sound attenuating device and insert Aug. 19, 1997
5496975 Plug muffler for aircraft and method of construction thereof Mar. 5, 1996
5444197 Muffler with intermediate sound-attenuating partition and method Aug. 22, 1995
5413189 Sound attenuating device and insert May. 9, 1995
4890691 Muffler Jan. 2, 1990
4809812 Converging, corridor-based, sound-attenuating muffler and method Mar. 7, 1989
4623035 Muffler of the sound reflecting type for use with internal combustion engines Nov. 18, 1986
4600076 Device for attenuating pulsation of fluids in piping systems Jul. 15, 1986
4595073 Plug-type muffler section Jun. 17, 1986
4588043 Sound suppressor for a firearm May. 13, 1986
4584924 Silencer for firearms Apr. 29, 1986
4574914 Compact, sound-attenuating muffler for high-performance, internal combustion engine Mar. 11, 1986
4550848 Baffle for canteens to prevent liquid splashing sounds Nov. 5, 1985
4550799 Muffler for exhaust gases Nov. 5, 1985
4541240 Exhaust system for internal combustion engines Sep. 17, 1985
4530417 Suppressor Jul. 23, 1985
4494625 Axial acoustic wave attenuator for ramjets Jan. 22, 1985

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