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Class Information
Number: 181/268
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Multi-passage
Description: Subject matter having a plurality of passages between which the moving fluid is divided.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8646573 Exhaust gas treatment device Feb. 11, 2014
8578719 Bleed assembly Nov. 12, 2013
8579077 Horizontally installed muffler having sporty tone Nov. 12, 2013
8550210 Resonant-type muffler Oct. 8, 2013
8528693 Muffler with dual exhaust gas discharge pipe for vehicle Sep. 10, 2013
8397493 Method for recovering waste heat from exhaust Mar. 19, 2013
8307944 Muffler Nov. 13, 2012
8256571 Frequency-modifying muffler Sep. 4, 2012
8230967 Vane type silencers in elbow for gas turbine Jul. 31, 2012
8220253 Exhaust gas aftertreatment device for an internal combustion engine Jul. 17, 2012
8196703 Exhaust component Jun. 12, 2012
8162103 Silencer for motor vehicle exhaust line Apr. 24, 2012
8136629 Silencer/muffler Mar. 20, 2012
8083026 Diffuser muffler Dec. 27, 2011
8016071 Multi-stage low pressure drop muffler Sep. 13, 2011
7980357 Exhaust silencer for microturbines Jul. 19, 2011
7955408 Device with no emission for treatment of exhaust gas Jun. 7, 2011
7926615 Method of making an exhaust-noise attenuation muffler, and exhaust-noise attenuation muffler Apr. 19, 2011
7896127 Muffler unit for general-purpose engine Mar. 1, 2011
7878298 Fuel-cell exhaust system Feb. 1, 2011
7874401 Exhaust muffler for exhaust system Jan. 25, 2011
7866441 Noise level reduction of sparger assemblies Jan. 11, 2011
7857095 Device with trace emission for treatment of exhaust gas Dec. 28, 2010
7823692 Muffler for engines in oilfield applications Nov. 2, 2010
7819223 Silencer for adsorption-based gas separation systems Oct. 26, 2010
7789195 Muffler of internal combustion engine Sep. 7, 2010
7708114 Sound-attenuating muffler having reduced back pressure May. 4, 2010
7694778 Fuel cell vehicle Apr. 13, 2010
7690479 Silencer Apr. 6, 2010
7621373 Acoustic drain Nov. 24, 2009
7610993 Flow-through mufflers with optional thermo-electric, sound cancellation, and tuning capabilities Nov. 3, 2009
7588424 Linear compressor unit Sep. 15, 2009
7584822 Noise level reduction of sparger assemblies Sep. 8, 2009
7571789 Muffler for exhaust systems of vehicles Aug. 11, 2009
7549511 Exhaust sound and emission control systems Jun. 23, 2009
7503427 Muffler Mar. 17, 2009
7484590 Fuel cell system with muffler Feb. 3, 2009
7416052 Exhaust system of internal combustion engine Aug. 26, 2008
7407036 Muffler for compact combustion engines Aug. 5, 2008
7380638 Exhaust noise control for motorcycles Jun. 3, 2008
7380637 Exhaust-gas muffler Jun. 3, 2008
7380635 Interference-based exhaust noise attenuation Jun. 3, 2008
7377359 Device for modulating noise in a motor vehicle May. 27, 2008
7357221 Exhaust gas muffler Apr. 15, 2008
7287622 Exhaust muffler Oct. 30, 2007
7243757 Exhaust muffler Jul. 17, 2007
7191868 Combined silencer and spark arrester Mar. 20, 2007
7174992 Muffler with secondary flow path Feb. 13, 2007
7147082 Suction muffler for a reciprocating hermetic compressor Dec. 12, 2006
7104359 Muffler having a baffle with angled plates Sep. 12, 2006

1 2 3 4










 
 
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