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Class Information
Number: 181/267
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Coaxial foraminous walls
Description: Subject matter in which are provided a plurality of coaxial cylindrical chambers having fluid pervious walls through which the fluid flows in a radial direction into the atmosphere.










Patents under this class:

Patent Number Title Of Patent Date Issued
8162103 Silencer for motor vehicle exhaust line Apr. 24, 2012
8100224 Suppressor with poly-conical baffles Jan. 24, 2012
8083025 Silencer provided on exhaust pipe of vehicle engine Dec. 27, 2011
7934582 Engine silencing and vibration reduction system and method May. 3, 2011
7793758 Triangular cross section exhaust muffler Sep. 14, 2010
7766123 Vehicle exhaust system Aug. 3, 2010
7753167 Silencer Jul. 13, 2010
7735604 Silencer of exhaust gases, in particular for motor vehicles Jun. 15, 2010
7552797 Vehicular exhaust system Jun. 30, 2009
7445083 Automotive muffler Nov. 4, 2008
6840348 Exhaust muffler Jan. 11, 2005
6736238 Air intake silencer May. 18, 2004
6672425 Noise abatement module Jan. 6, 2004
6533065 Noise silencer and method for use with an ultrasonic meter Mar. 18, 2003
6510921 Muffler/exhaust extractor Jan. 28, 2003
6467570 Spark arrester with spark filter Oct. 22, 2002
6415887 Refractive wave muffler Jul. 9, 2002
6199658 Multi-Fold side branch muffler Mar. 13, 2001
5971097 Muffler for motor vehicles Oct. 26, 1999
5962821 Internal combustion engine noise reduction apparatus Oct. 5, 1999
5957553 Audiovisual equipment and casing thereof and method of producing the same Sep. 28, 1999
5952625 Multi-fold side branch muffler Sep. 14, 1999
5661272 Engine noise reduction apparatus Aug. 26, 1997
5399817 Muffler Mar. 21, 1995
5371331 Modular muffler for motor vehicles Dec. 6, 1994
5350888 Broad band low frequency passive muffler Sep. 27, 1994
5274201 Noise muffler for an air blower Dec. 28, 1993
5266755 Car silencer for absorbing sound and exhaust pollutants Nov. 30, 1993
5253603 Underwater vehicle muffler Oct. 19, 1993
5227593 Muffler assembly for engine Jul. 13, 1993
5170020 Rainproof exhaust pipe Dec. 8, 1992
5151254 Exhaust gas cleaning device for internal combustion engine Sep. 29, 1992
4877084 Gas well discharge velocity dissipator Oct. 31, 1989
4751980 Sound attenuation apparatus Jun. 21, 1988
4617963 Control valve with anticavitation trim Oct. 21, 1986
4595073 Plug-type muffler section Jun. 17, 1986
4367807 Sound absorber for compressed-air operated apparatuses, in particular compressed air vibrators Jan. 11, 1983
4318720 Exhaust filter muffler Mar. 9, 1982
4241805 High pressure gas vent noise control apparatus and method Dec. 30, 1980
4184564 Combination muffler and air filter Jan. 22, 1980
4136757 Absorption muffler construction Jan. 30, 1979
4127183 Silencer device Nov. 28, 1978
4082160 Silencer for exhausting gas streams Apr. 4, 1978
3957133 Muffler May. 18, 1976











 
 
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