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Class Information
Number: 181/213
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Reaction engine type
Description: Subject matter comprising fluid conducting device which muffles or dampens noise emanating from a reaction type engine.

Sub-classes under this class:

Class Number Class Name Patents
181/218 Ground installation silencer 29
181/217 Removable silencer unit (e.g., mobile) 23
181/214 Upstream (e.g., intake silencer) 130
181/219 With adjustable internal baffles 27
181/215 With adjustable outlet nozzle 38
181/220 With disparate fluid mingling 113
181/222 With sound absorbing material 114

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8689933 Helmholtz resonator for a gas turbine combustion chamber Apr. 8, 2014
8684130 Damping system for combustor Apr. 1, 2014
8661822 Acoustically stiffened gas turbine combustor supply Mar. 4, 2014
8661795 Exhaust system having multiple inlets and multiple outlets Mar. 4, 2014
8640820 High-speed jet noise reduction via fluidic injection Feb. 4, 2014
8635875 Gas turbine engine exhaust mixer including circumferentially spaced-apart radial rows of tabs extending downstream on the radial walls, crests and troughs Jan. 28, 2014
8621842 Exhaust silencer convection cooling Jan. 7, 2014
8607452 Method for reducing sound output at the back of a turbo engine and turbo engine improved by this method Dec. 17, 2013
8596050 Sound attenuating heat exchanger for an internal combustion engine Dec. 3, 2013
8579078 Acoustic panel for a turbojet engine nacelle, with in-built fasteners Nov. 12, 2013
8579076 Splicing of curved acoustic honeycomb Nov. 12, 2013
8556027 Eductor exhaust silencer assembly with bypass gasflow Oct. 15, 2013
8549834 Gas turbine engine with variable area fan nozzle Oct. 8, 2013
8544598 Soundproofing panel for turbomachine and turbomachine comprising such a panel Oct. 1, 2013
8539748 Segmented inertial particle separators and methods of assembling turbine engines Sep. 24, 2013
8511096 High bleed flow muffling system Aug. 20, 2013
8511090 Jet engine nozzle exit configurations and associated systems and methods Aug. 20, 2013
8490744 Combustor and gas turbine having the same Jul. 23, 2013
8479877 Gas-turbine exhaust cone with three-dimensionally profiled partition wall and plate-type wall element Jul. 9, 2013
8469141 Acoustic damping device for use in gas turbine engine Jun. 25, 2013
8459407 Sound attenuation systems and methods Jun. 11, 2013
8413443 Flow control through a resonator system of gas turbine combustor Apr. 9, 2013
8375722 Flow modulation method and apparatus Feb. 19, 2013
8307945 Gas-turbine exhaust cone Nov. 13, 2012
8297404 Soundproof exhaust pipe for a turbine engine Oct. 30, 2012
8291689 Corrugated core cowl for a gas turbine engine Oct. 23, 2012
8286654 Gas turbine engine inlet with noise reduction features Oct. 16, 2012
8234869 Aviation engine inlet with tangential blowing for buzz saw noise control Aug. 7, 2012
8235170 Integrated tailcone muffler assemblies and methods Aug. 7, 2012
8230967 Vane type silencers in elbow for gas turbine Jul. 31, 2012
8220586 Noise-reduced aircraft engine and method for reducing noise emissions of an aircraft engine Jul. 17, 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
8205714 Method for adjusting a Helmholtz resonator and an adjustable Helmholtz resonator Jun. 26, 2012
8146708 Muffler with integrated catalytic converter and polymeric muffler body Apr. 3, 2012
8127546 Turbine engine fuel injector with helmholtz resonators Mar. 6, 2012
8087250 Duplex tab exhaust nozzle Jan. 3, 2012
8033111 Damping of vibration of a combustion chamber by resonators Oct. 11, 2011
8028802 Method and system for damped acoustic panels Oct. 4, 2011
8028797 System for joining acoustic cellular panel sections in edge-to-edge relation Oct. 4, 2011
8025122 Acoustically treated exhaust centerbody for jet engines and associated methods Sep. 27, 2011
8015819 Wet active chevron nozzle for controllable jet noise reduction Sep. 13, 2011
7984787 Fluid-carrying conduit and method with noise attenuation Jul. 26, 2011
7966824 Jet engine nozzle exit configurations and associated systems and methods Jun. 28, 2011
7966826 Systems and methods for reducing noise from jet engine exhaust Jun. 28, 2011
7950236 Exhaust duct and tail cone attachment of aircraft engines May. 31, 2011
7938224 Coating for acoustic treatment integrating the function of frost treatment with hot air May. 10, 2011
7891195 Central body of a turbojet nozzle Feb. 22, 2011
7886543 Central body for a turbojet exhaust channel, turbojet Feb. 15, 2011
7866440 System for joining acoustic cellular panel sections in edge-to-edge relation Jan. 11, 2011
7857093 Engine inlet deep acoustic liner section Dec. 28, 2010

1 2 3 4 5

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