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Class Information
Number: 181/222
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Reaction engine type > With sound absorbing material
Description: Subject matter comprising sound absorbing material positioned in the shroud to be contacted by the exhaust gases, as by surrounding or being positioned adjacent to and communicating with the exhaust gases.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8667949 Engine driven power generator apparatus Mar. 11, 2014
8646574 Acoustic skin for an aircraft nacelle acoustic panel Feb. 11, 2014
8640825 Acoustic panel for an ejector nozzle Feb. 4, 2014
8584795 Filter silencer Nov. 19, 2013
8579074 Intake silencer for gas turbine Nov. 12, 2013
8517057 Pump installations Aug. 27, 2013
8408359 Acoustic attenuation method based on acoustic ray deflection theory and a muffler Apr. 2, 2013
8397863 Muffler with a built-in heat exchanger Mar. 19, 2013
8393436 Flexible muffler for use in aircraft environmental control systems and method of manufacture Mar. 12, 2013
8336301 Exhaust gas treatment unit Dec. 25, 2012
8240427 Sound attenuation systems and methods Aug. 14, 2012
8215448 Sound damper for vehicle compressed air systems Jul. 10, 2012
8210307 Sonic absorption device for an air pipeline of an aircraft, in particular of an air conditioning system of an aircraft Jul. 3, 2012
8043690 Exhaust washed structure and associated composite structure and method of fabrication Oct. 25, 2011
7861823 Duct for reducing shock related noise Jan. 4, 2011
7798285 Acoustic barrel for aircraft engine nacelle including crack and delamination stoppers Sep. 21, 2010
7789194 Acoustic attenuation chamber Sep. 7, 2010
7694778 Fuel cell vehicle Apr. 13, 2010
7661510 Method for the manufacture of a light-weight sheet Feb. 16, 2010
7464789 Exhaust silencer for internal combustion engine Dec. 16, 2008
7431125 Composite muffler for use with airborne auxiliary power unit Oct. 7, 2008
7407037 Exhaust silencer for internal combustion engine Aug. 5, 2008
7380572 Energy attenuation apparatus for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit Jun. 3, 2008
RE39972 Detachable integral aircraft tailcone and power assembly Jan. 1, 2008
7278514 Acoustic noise filter Oct. 9, 2007
7267297 Integrated axially varying engine muffler, and associated methods and systems Sep. 11, 2007
7261181 Detatchable muffler apparatus for pneumatic tools Aug. 28, 2007
7131287 Air conditioning system with vibration dampening device Nov. 7, 2006
7127884 Muffler with an integrated catalytic converter Oct. 31, 2006
7104749 Intake silencer for gas turbines Sep. 12, 2006
7104750 Fogging device for gas turbines Sep. 12, 2006
7100737 Muffler for noise reduction Sep. 5, 2006
7051523 Exhaust system assemblies employing wire bushings for thermal compensation May. 30, 2006
7017706 Turbine noise absorber Mar. 28, 2006
6935460 Noise muffler for oxygen concentrator Aug. 30, 2005
6926117 Muffler for pneumatic hand tool Aug. 9, 2005
6920959 Inlet and outlet duct units for air supply fan Jul. 26, 2005
6899198 Compressed air muffler May. 31, 2005
6892851 Acoustic attenuator May. 17, 2005
6880670 Muffler for suction system exhaust air used with an automatic cutting machine Apr. 19, 2005
6857502 Engine muffler and method of manufacturing the same Feb. 22, 2005
6799657 Absorptive/reactive muffler for variable speed compressors Oct. 5, 2004
6766639 Acoustic-structural LPC splitter Jul. 27, 2004
6722467 Noise attenuator for an air supply system of an internal combustion engine Apr. 20, 2004
6672424 Acoustically treated turbomachine multi-duct exhaust device Jan. 6, 2004
6615576 Tortuous path quiet exhaust eductor system Sep. 9, 2003
6581723 Muffler shell filling process, muffler filled with fibrous material and vacuum filling device Jun. 24, 2003
6539702 Gas turbine exhaust passage and damper system for same having a non-enclosed porous peripheral wall Apr. 1, 2003
6457550 Weatherproof sound attenuating device Oct. 1, 2002
6393835 Exhaust muffler comprising a catalytic converter May. 28, 2002

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