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Class Information
Number: 181/265
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Retroverted
Description: Subject matter having a plurality of serially connected fluid passages substantially parallel to the inlet, the direction of flow of the fluid being reversed as it travels through each successive passage.










Sub-classes under this class:

Class Number Class Name Patents
181/266 And side branch chamber 71


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8579077 Horizontally installed muffler having sporty tone Nov. 12, 2013
8348013 Exhaust device of internal combustion engine Jan. 8, 2013
8302732 Silencer Nov. 6, 2012
8205710 Belt-type continuously variable transmission having resin block belt and motorcycle including belt-type continuously variable transmission Jun. 26, 2012
8047328 Plastic muffler and method for making same Nov. 1, 2011
8011471 Exhaust chamber for the exhaust line of an automobile Sep. 6, 2011
7918310 Noise attenuation device for reducing jet engine noise during testing Apr. 5, 2011
7753168 Muffler Jul. 13, 2010
7712578 Muffler of vehicle and exhaust apparatus using the same May. 11, 2010
7637349 Exhaust system of motorcycle and motorcycle including exhaust system Dec. 29, 2009
7407036 Muffler for compact combustion engines Aug. 5, 2008
7389853 Muffler for an engine Jun. 24, 2008
7380637 Exhaust-gas muffler Jun. 3, 2008
7174991 Muffler for internal combustion engine Feb. 13, 2007
6973959 Heat exchanger for cooling a motor vehicle exhaust gases Dec. 13, 2005
6802388 Silencer or noise damper Oct. 12, 2004
6745863 Exhaust system structure for motorcycle Jun. 8, 2004
6672425 Noise abatement module Jan. 6, 2004
6629580 Perforated end pipe of silencer unit Oct. 7, 2003
6571911 Muffler for an engine Jun. 3, 2003
6510921 Muffler/exhaust extractor Jan. 28, 2003
6470998 Modular muffler with end plate adaptors and spark arresters Oct. 29, 2002
6443255 Marine muffler Sep. 3, 2002
6435302 Motor vehicle muffler Aug. 20, 2002
6427802 Muffler Aug. 6, 2002
6394225 Muffler structure May. 28, 2002
6312650 Silencer Nov. 6, 2001
6199658 Multi-Fold side branch muffler Mar. 13, 2001
6189650 Muffler structure Feb. 20, 2001
6176347 Semi-active muffler for internal combustion engine Jan. 23, 2001
6173808 Automobile exhaust noise silencer Jan. 16, 2001
6102154 Muffler Aug. 15, 2000
6098745 Dome muffler Aug. 8, 2000
6052990 Exhaust pipe and method and system for enhancing engine performance Apr. 25, 2000
5984045 Engine exhaust noise suppressor Nov. 16, 1999
5971098 Muffler for internal combustion engine Oct. 26, 1999
5959263 Bypass muffler Sep. 28, 1999
5952625 Multi-fold side branch muffler Sep. 14, 1999
5929398 Muffler device Jul. 27, 1999
5917161 Muffler with variable damping characteristics Jun. 29, 1999
5898140 Exhaust silencing device Apr. 27, 1999
5824972 Acoustic muffler Oct. 20, 1998
5801344 Sound attenuator with throat tuner Sep. 1, 1998
5801343 Muffler for internal combustion engine Sep. 1, 1998
5739483 Automobile exhaust noise suppressor Apr. 14, 1998
5712454 Exhaust system in internal combustion engine Jan. 27, 1998
5708238 Exhaust silencing device Jan. 13, 1998
5708237 Automobile exhaust noise silencer Jan. 13, 1998
5677518 Device for deadening sound in pipelines Oct. 14, 1997
5659158 Sound attenuating device and insert Aug. 19, 1997

1 2 3 4










 
 
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