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Class Information
Number: 181/251
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Straight-through passage > Continuous conduit > With expansion chamber > And multi-passage
Description: Subject matter having a plurality of through passages between which the moving fluid is divided.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8661795 Exhaust system having multiple inlets and multiple outlets Mar. 4, 2014
8627921 Exhaust filter Jan. 14, 2014
8550210 Resonant-type muffler Oct. 8, 2013
8397493 Method for recovering waste heat from exhaust Mar. 19, 2013
8292026 Silencer Oct. 23, 2012
8220587 Silencer cover for saddle-ride type vehicle Jul. 17, 2012
8191676 Resonator for a dual-flow exhaust system Jun. 5, 2012
8162103 Silencer for motor vehicle exhaust line Apr. 24, 2012
8127887 Vehicle including silencer Mar. 6, 2012
8127540 Exhauster for motorcycle and motorcycle including exhauster Mar. 6, 2012
8069660 System for recovering waste heat from exhaust Dec. 6, 2011
8051949 Vehicle exhaust muffler Nov. 8, 2011
8028798 Exhaust pipe structure for saddle-ride type vehicle Oct. 4, 2011
8025121 Tube structure for exhaust component Sep. 27, 2011
7997382 Exhaust device for straddle-type vehicle and straddle-type vehicle Aug. 16, 2011
7955408 Device with no emission for treatment of exhaust gas Jun. 7, 2011
7946383 Acoustic load mitigator May. 24, 2011
7942235 Exhaust system for an internal combustion engine May. 17, 2011
7918311 Muffler and engine exhaust apparatus Apr. 5, 2011
7896130 Snap action valve with inertia damper Mar. 1, 2011
7878300 Integrated modular exhaust system Feb. 1, 2011
7874401 Exhaust muffler for exhaust system Jan. 25, 2011
7857095 Device with trace emission for treatment of exhaust gas Dec. 28, 2010
7849959 Exhaust pipe structure for vehicle Dec. 14, 2010
7810610 Exhaust device including elastically deformable annular member and vehicle with exhaust device Oct. 12, 2010
7789195 Muffler of internal combustion engine Sep. 7, 2010
7770694 Resonator arrangement in an acoustic muffler for a refrigeration compressor Aug. 10, 2010
7610993 Flow-through mufflers with optional thermo-electric, sound cancellation, and tuning capabilities Nov. 3, 2009
7571789 Muffler for exhaust systems of vehicles Aug. 11, 2009
7510051 Switchable loud and quiet exhaust apparatus Mar. 31, 2009
7506722 Vehicle exhaust systems Mar. 24, 2009
7503427 Muffler Mar. 17, 2009
7472774 Versatile engine muffling system Jan. 6, 2009
7445083 Automotive muffler Nov. 4, 2008
7426980 Internal combustion engine exhaust system Sep. 23, 2008
7416052 Exhaust system of internal combustion engine Aug. 26, 2008
7380635 Interference-based exhaust noise attenuation Jun. 3, 2008
7380638 Exhaust noise control for motorcycles Jun. 3, 2008
7377359 Device for modulating noise in a motor vehicle May. 27, 2008
7364010 Exhaust system for a motorcycle, and motorcycle including same Apr. 29, 2008
7287622 Exhaust muffler Oct. 30, 2007
7243757 Exhaust muffler Jul. 17, 2007
7174992 Muffler with secondary flow path Feb. 13, 2007
6990804 Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine Jan. 31, 2006
6968922 Exhaust apparatus for vehicle Nov. 29, 2005
6915877 Muffler device Jul. 12, 2005
6880670 Muffler for suction system exhaust air used with an automatic cutting machine Apr. 19, 2005
6868939 Exhaust silencer system Mar. 22, 2005
6755279 Controllable muffler system for internal combustion engine Jun. 29, 2004
6715583 Silencer and power enhancement environmental device Apr. 6, 2004

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