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Class Information
Number: 181/238
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Multiple distinct inlets and/or outlets
Description: Subject matter wherein the moving fluid is introduced in the muffler via at least two inlets or expelled through at least two outlets.










Sub-classes under this class:

Class Number Class Name Patents
181/239 Outlets 97


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8678038 Exhaust system, a saddle riding type vehicle having the same, and a method of manufacturing and mounting an exhaust pipe Mar. 25, 2014
8596050 Sound attenuating heat exchanger for an internal combustion engine Dec. 3, 2013
8474417 Lubricating system for air-cooled general-purpose engine Jul. 2, 2013
8468825 Method for producing shaft horsepower using waste heat Jun. 25, 2013
8434588 Exhaust device for vehicle internal combustion engine May. 7, 2013
8418445 Exhaust system for an internal combustion engine Apr. 16, 2013
8397863 Muffler with a built-in heat exchanger Mar. 19, 2013
8393147 Exhaust system having an aftertreatment module Mar. 12, 2013
8191676 Resonator for a dual-flow exhaust system Jun. 5, 2012
8181732 Y splitter for exhaust systems May. 22, 2012
8028798 Exhaust pipe structure for saddle-ride type vehicle Oct. 4, 2011
7942240 Silencer for internal combustion engine May. 17, 2011
7878300 Integrated modular exhaust system Feb. 1, 2011
7861824 Sound absorber for an exhaust system Jan. 4, 2011
7789195 Muffler of internal combustion engine Sep. 7, 2010
7762374 Turbine engine diffusing exhaust muffler Jul. 27, 2010
7712578 Muffler of vehicle and exhaust apparatus using the same May. 11, 2010
7694660 Air induction housing having a perforated wall and interfacing sound attenuation chamber Apr. 13, 2010
7690479 Silencer Apr. 6, 2010
7578659 Compressor discharge muffler Aug. 25, 2009
7426980 Internal combustion engine exhaust system Sep. 23, 2008
7377359 Device for modulating noise in a motor vehicle May. 27, 2008
7104359 Muffler having a baffle with angled plates Sep. 12, 2006
6959782 Tuned exhaust system for small engines Nov. 1, 2005
6955043 Muffler assembly Oct. 18, 2005
6938727 Integrated engine compartment component and air intake system Sep. 6, 2005
6932189 Device for noise structuring in a motor vehicle Aug. 23, 2005
6926117 Muffler for pneumatic hand tool Aug. 9, 2005
6796402 Muffler having isolated dual flow baffle structure Sep. 28, 2004
6779628 Device for producing an overtone-rich sporty exhaust sound Aug. 24, 2004
6702062 Exhaust system for automobile engine Mar. 9, 2004
6622819 Sound attenuator for pneumatic exhaust Sep. 23, 2003
6588203 Exhaust device of internal combustion engine Jul. 8, 2003
6520287 Methods and systems for low temperature cleaning of diesel exhaust and other incomplete combustion products of carbon-containing fuels Feb. 18, 2003
6470998 Modular muffler with end plate adaptors and spark arresters Oct. 29, 2002
6467260 Gas flow headers for internal combustion engines Oct. 22, 2002
6457552 Methods and apparatus for low back pressure muffling of internal combustion engines Oct. 1, 2002
6431311 Muffler with interchangeable outlet tips Aug. 13, 2002
6382347 Exhaust muffler for an internal combustion engine May. 7, 2002
6161646 Turbo-generator exhaust noise silencer Dec. 19, 2000
6131696 Multiple inlet muffler Oct. 17, 2000
6045422 Wedge with angularly adjustable positions Apr. 4, 2000
6042437 Exhaust knock down spray Mar. 28, 2000
5979583 Muffler for motorcycle Nov. 9, 1999
5929398 Muffler device Jul. 27, 1999
5846107 Marine engine noise suppressor Dec. 8, 1998
5775100 Dual inlet muffler connection Jul. 7, 1998
5712455 Dual entry plug muffler Jan. 27, 1998
5608194 Exhaust pipe structure for a motorcycle Mar. 4, 1997
5594217 Exhaust muffler for small marine craft Jan. 14, 1997

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