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Class Information
Number: 181/266
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Retroverted > And side branch chamber
Description: Subject matter having cushion, acoustic filter, or resonator chambers in communication with the fluid passage.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8359836 Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine Jan. 29, 2013
8316639 Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine Nov. 27, 2012
8312713 Internal combustion engine, vehicle, marine vessel, and exhausting method for internal combustion engine Nov. 20, 2012
8215450 Exhaust muffler device Jul. 10, 2012
7946382 Gas compressor with side branch absorber for pulsation control May. 24, 2011
7942239 Exhaust muffler May. 17, 2011
7870930 Exhaust system with external helmholtz resonator and associated method Jan. 18, 2011
7798286 Exhaust muffler having a horizontally extending sound attenuation chamber Sep. 21, 2010
7770694 Resonator arrangement in an acoustic muffler for a refrigeration compressor Aug. 10, 2010
7735604 Silencer of exhaust gases, in particular for motor vehicles Jun. 15, 2010
7690479 Silencer Apr. 6, 2010
7584821 Adjustable helmholtz resonator Sep. 8, 2009
7575096 Pressed assembly for passive valve installation Aug. 18, 2009
7527125 Muffler for an exhaust system May. 5, 2009
7367424 Eccentric exhaust muffler for use with auxiliary power units May. 6, 2008
7364013 Shell main body for muffler Apr. 29, 2008
7337876 Suction apparatus with noise reduction means Mar. 4, 2008
7337877 Variable geometry resonator for acoustic control Mar. 4, 2008
7334663 Variable resonator Feb. 26, 2008
7293628 Shell main body for muffler Nov. 13, 2007
7281605 Mufflers with enhanced acoustic performance at low and moderate frequencies Oct. 16, 2007
7255197 Muffler Aug. 14, 2007
7117974 Electronically controlled dual chamber variable resonator Oct. 10, 2006
7017707 Herschel-Quincke tube for vehicle applications Mar. 28, 2006
6973959 Heat exchanger for cooling a motor vehicle exhaust gases Dec. 13, 2005
6742623 Muffler for internal combustion engine Jun. 1, 2004
6510921 Muffler/exhaust extractor Jan. 28, 2003
6467570 Spark arrester with spark filter Oct. 22, 2002
5952625 Multi-fold side branch muffler Sep. 14, 1999
5801344 Sound attenuator with throat tuner Sep. 1, 1998
5670756 Silencer Sep. 23, 1997
5502283 Muffler Mar. 26, 1996
5196653 Muffler for air powered turbine drive Mar. 23, 1993
5183976 Adjustable sound attenuating device Feb. 2, 1993
5183977 Muffler assembly of internal combustion engine Feb. 2, 1993
5168132 Exhaust gas muffler Dec. 1, 1992
5162621 Internal sidebranch resonator Nov. 10, 1992
5145026 Water faucet silencer apparatus Sep. 8, 1992
5025890 Engine exhaust apparatus Jun. 25, 1991
4953660 Muffler with two part housing and flow tubes Sep. 4, 1990
4947957 Regenerable desiccant cartridge for automotive muffler Aug. 14, 1990
4924968 Stamp formed muffler with reinforced outer shell May. 15, 1990
4911262 Muffler Mar. 27, 1990
4846302 Acoustic muffler Jul. 11, 1989
4841728 Straight through type muffler for generating the exhaust flow from an internal combustion engine Jun. 27, 1989
4836330 Plural chamber stamp formed muffler with single intermediate tube Jun. 6, 1989
4800719 Exhaust system Jan. 31, 1989
4790409 Muffler with reverse flow passages Dec. 13, 1988
4765437 Stamp formed muffler with multiple low frequency resonating chambers Aug. 23, 1988
4760894 Exhaust muffler with angularly aligned inlets and outlets Aug. 2, 1988

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