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Class Information
Number: 181/220
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Reaction engine type > With disparate fluid mingling
Description: Subject matter in which a fluid is introduced into and mingled with the moving fluids to assist in muffling, as by dilution or condensing the moving fluids.

Sub-classes under this class:

Class Number Class Name Patents
181/221 Liquid 19

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8640820 High-speed jet noise reduction via fluidic injection Feb. 4, 2014
8621842 Exhaust silencer convection cooling Jan. 7, 2014
8584356 Method of manufacturing a CMC flow mixer lobed structure for a gas turbine aeroengine Nov. 19, 2013
8556027 Eductor exhaust silencer assembly with bypass gasflow Oct. 15, 2013
8544278 Turboshaft engine with reduced noise emission for aircraft Oct. 1, 2013
8539748 Segmented inertial particle separators and methods of assembling turbine engines Sep. 24, 2013
8516824 Gas ejection cone for an aircraft turbojet equipped with a device for generating turbulence in a primary flow limiting jet noise Aug. 27, 2013
8225592 Microjet noise suppression system for jet engines Jul. 24, 2012
8220586 Noise-reduced aircraft engine and method for reducing noise emissions of an aircraft engine Jul. 17, 2012
8157050 Device for reducing noise generated by an aircraft jet engine with curve ducts Apr. 17, 2012
8069666 System for generating shaft horsepower using waste heat Dec. 6, 2011
8069647 Jet nozzle mixer Dec. 6, 2011
7882696 Integrated support and mixer for turbo machinery Feb. 8, 2011
7866141 Cooling device for the primary nozzle of a dual-flow turbojet engine Jan. 11, 2011
7827780 Assembly procedure for the adjustable pin-valve, fuel shut-off Nov. 9, 2010
7802752 Jet engine noise suppressor Sep. 28, 2010
7784270 Rotary motion mixer for a converging-stream nozzle of a turbomachine Aug. 31, 2010
7735601 Engine noise Jun. 15, 2010
7677026 Mixer for separate-flow nozzle Mar. 16, 2010
7581384 Turbomachine nozzle cover provided with triangular patterns having a point of inflexion for reducing jet noise Sep. 1, 2009
7578369 Mixed-flow exhaust silencer assembly Aug. 25, 2009
7516815 Arrangement for the generation of sonic fields of a specific modal composition Apr. 14, 2009
7448215 Combustion chamber for a gas turbine engine Nov. 11, 2008
7392651 Turbomachine nozzle cover for reducing jet noise Jul. 1, 2008
7389635 Twisted mixer with open center body Jun. 24, 2008
7310939 Device for reducing the jet noise of a turbomachine Dec. 25, 2007
7308966 Device for reducing jet engine exhaust noise using oscillating jets Dec. 18, 2007
7293401 Jet engine noise suppressor Nov. 13, 2007
7251927 Jet nozzle mixer Aug. 7, 2007
7246481 Methods and apparatus for operating gas turbine engines Jul. 24, 2007
7111448 Jet nozzle mixer Sep. 26, 2006
7080514 High frequency dynamics resonator assembly Jul. 25, 2006
7065957 Segmented mixing device for jet engines and aircraft Jun. 27, 2006
7062908 Construction for exhaust emission control Jun. 20, 2006
7055329 Method and apparatus for noise attenuation for gas turbine engines using at least one synthetic jet actuator for injecting air Jun. 6, 2006
7055308 Detonation damper for pulse detonation engines Jun. 6, 2006
7043898 Combined exhaust duct and mixer for a gas turbine engine May. 16, 2006
7017331 Jet nozzle mixer Mar. 28, 2006
6971229 Confluent exhaust nozzle Dec. 6, 2005
6910550 Muffler arrangement for an internal combustion engine Jun. 28, 2005
6896100 Noise reducing apparatus and exhaust nozzle for jet engine May. 24, 2005
6854260 Jet nozzle mixer Feb. 15, 2005
6820419 Marine wet exhaust system Nov. 23, 2004
6804948 Lobe mixer for jet engine Oct. 19, 2004
6718752 Deployable segmented exhaust nozzle for a jet engine Apr. 13, 2004
6640537 Aero-engine exhaust jet noise reduction assembly Nov. 4, 2003
6615576 Tortuous path quiet exhaust eductor system Sep. 9, 2003
6615857 Modular flow control actuator Sep. 9, 2003
6606854 Exhaust mixer and apparatus using same Aug. 19, 2003
6578355 Bloom mixer for a turbofan engine Jun. 17, 2003

1 2 3

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