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Class Information
Number: 181/255
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Straight-through passage > Expansion chamber
Description: Subject matter having enlarged chambers intermediate the length of the through passage.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8701824 Muffler for small-sized vehicle Apr. 22, 2014
8651231 Muffler tube with folded end tabs Feb. 18, 2014
8607923 Exhaust apparatus of internal combustion engine Dec. 17, 2013
8561758 Exhaust apparatus of internal combustion engine Oct. 22, 2013
8381870 Fluid flow controller Feb. 26, 2013
8307944 Muffler Nov. 13, 2012
8205713 Vehicle silencer Jun. 26, 2012
8191676 Resonator for a dual-flow exhaust system Jun. 5, 2012
8109084 Exhaust device for motorcycle Feb. 7, 2012
7895832 Performance exhaust system Mar. 1, 2011
7866442 Muffler and vehicle equipped with muffler Jan. 11, 2011
7845464 Noise abatement device for a pneumatic tool Dec. 7, 2010
7819222 Device and method for attenuating energy along a conduit Oct. 26, 2010
7735604 Silencer of exhaust gases, in particular for motor vehicles Jun. 15, 2010
7669693 Exhaust muffling device Mar. 2, 2010
7624841 Silencer Dec. 1, 2009
7617675 Catalyst chamber Nov. 17, 2009
7584821 Adjustable helmholtz resonator Sep. 8, 2009
7556123 Muffler duct Jul. 7, 2009
7549510 Vehicle exhaust system Jun. 23, 2009
7543683 Vehicle resonator structure and attachment method Jun. 9, 2009
7510050 Vehicle exhaust systems Mar. 31, 2009
7503427 Muffler Mar. 17, 2009
7464787 Motorcycle exhaust assembly and method of using same Dec. 16, 2008
7426980 Internal combustion engine exhaust system Sep. 23, 2008
7389852 Integrated heat exchanger and muffler unit Jun. 24, 2008
7387188 Sound absorber Jun. 17, 2008
7383919 Rotatable propeller driven engine exhaust system Jun. 10, 2008
7384609 Pre-converter device for cleaning exhaust gas for an internal combustion engine Jun. 10, 2008
7377359 Device for modulating noise in a motor vehicle May. 27, 2008
7367424 Eccentric exhaust muffler for use with auxiliary power units May. 6, 2008
7364013 Shell main body for muffler Apr. 29, 2008
7334402 Exhaust system with catalytic converter and motorcycle using the same Feb. 26, 2008
7308967 Sound suppressor Dec. 18, 2007
7293628 Shell main body for muffler Nov. 13, 2007
7287622 Exhaust muffler Oct. 30, 2007
7278514 Acoustic noise filter Oct. 9, 2007
7273130 Device and method for active soundproofing, and power unit for aeroplanes Sep. 25, 2007
7261755 Heat-resistant filter layer, filter body, and process for producing the filter layer and the filter body Aug. 28, 2007
7255197 Muffler Aug. 14, 2007
7243757 Exhaust muffler Jul. 17, 2007
7174992 Muffler with secondary flow path Feb. 13, 2007
7159692 Silencer Jan. 9, 2007
7044266 Exhaust muffler for internal combustion engines May. 16, 2006
7017610 Damper for hydraulic systems Mar. 28, 2006
6988057 Methods for designing a chamber to reduce noise in a duct Jan. 17, 2006
6968922 Exhaust apparatus for vehicle Nov. 29, 2005
6948585 Acoustic wave attenuator for a rail Sep. 27, 2005
6941751 Exhaust muffler and muffler system for use with an internal combustion engine Sep. 13, 2005
6932188 Silencer for vacuum cleaner Aug. 23, 2005

1 2 3 4










 
 
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