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Class Information
Number: 181/269
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Expansion chamber type
Description: Subject matter having an enlarged chamber intermediate the length of the fluid passage.










Sub-classes under this class:

Class Number Class Name Patents
181/275 And multi-passage 107
181/273 And side branch chamber 99
181/272 Plural chambers 420
181/271 With adjustable or flexible wall 36
181/270 With alternating partial baffles along the length of casing 60
181/274 With centrifugal flow 31


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8701824 Muffler for small-sized vehicle Apr. 22, 2014
8601713 Silencer for drying appliance and quiet hairdryer Dec. 10, 2013
8572949 Flow guide device as well as exhaust system equipped therewith Nov. 5, 2013
8381870 Fluid flow controller Feb. 26, 2013
8359835 Exhaust device and vehicle with exhaust device Jan. 29, 2013
8307944 Muffler Nov. 13, 2012
8256132 Silencer for drying appliance and silent hair dryer Sep. 4, 2012
8215450 Exhaust muffler device Jul. 10, 2012
8205716 Exhaust muffler Jun. 26, 2012
8162103 Silencer for motor vehicle exhaust line Apr. 24, 2012
8025123 Muffler structure for vehicle Sep. 27, 2011
7971682 Exhaust device for engine Jul. 5, 2011
7942238 Marine muffler with angularly disposed internal baffle May. 17, 2011
7942240 Silencer for internal combustion engine May. 17, 2011
7866442 Muffler and vehicle equipped with muffler Jan. 11, 2011
7775323 Silencer with fin outlet Aug. 17, 2010
7735604 Silencer of exhaust gases, in particular for motor vehicles Jun. 15, 2010
7708115 Sound-attenuating muffler having reduced back pressure May. 4, 2010
7690479 Silencer Apr. 6, 2010
7669694 Muffler for vehicle Mar. 2, 2010
7669693 Exhaust muffling device Mar. 2, 2010
7631725 Exhaust system Dec. 15, 2009
7617909 Muffler Nov. 17, 2009
7537084 Discharge gas check valve integral with muffler May. 26, 2009
7484590 Fuel cell system with muffler Feb. 3, 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
7407036 Muffler for compact combustion engines Aug. 5, 2008
7380637 Exhaust-gas muffler Jun. 3, 2008
7377359 Device for modulating noise in a motor vehicle May. 27, 2008
7364013 Shell main body for muffler Apr. 29, 2008
7350620 Compact silencer Apr. 1, 2008
7328574 Exhaust line and motor vehicle equipped therewith Feb. 12, 2008
7296657 Engine exhaust muffler with exhaust emission control function Nov. 20, 2007
7293628 Shell main body for muffler Nov. 13, 2007
7287622 Exhaust muffler Oct. 30, 2007
7263826 Muffler device with catalysts for improving purifying exhaust gas of nitrogen oxides within a motorcycle exhaust pipe Sep. 4, 2007
7255197 Muffler Aug. 14, 2007
7243757 Exhaust muffler Jul. 17, 2007
7191868 Combined silencer and spark arrester Mar. 20, 2007
7189068 Sound reduced rotary vane compressor Mar. 13, 2007
7174992 Muffler with secondary flow path Feb. 13, 2007
7114330 Vertical exhaust water trap assembly Oct. 3, 2006
7104359 Muffler having a baffle with angled plates Sep. 12, 2006
7073626 Engine exhaust muffler with guide vanes imparting a successively alternating spiral swirl gas flow Jul. 11, 2006
7063182 Muffler baffle plate spacer formed from stock material Jun. 20, 2006
7044266 Exhaust muffler for internal combustion engines May. 16, 2006
7032709 Exhaust-gas muffler Apr. 25, 2006
7004283 Multiple-chambered exhaust muffler Feb. 28, 2006

1 2 3 4










 
 
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