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Class Information
Number: 181/250
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Straight-through passage > Continuous conduit > With expansion chamber > And side branch
Description: Subject matter having cushion, acoustic filter, or resonator chambers in communication with the through passage.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8634574 Sound transmitting device Jan. 21, 2014
8622168 Motorcycle exhaust system structure including a resonator provided to an exhaust pipe Jan. 7, 2014
8607923 Exhaust apparatus of internal combustion engine Dec. 17, 2013
8561758 Exhaust apparatus of internal combustion engine Oct. 22, 2013
8550057 Integral rotor noise attenuators Oct. 8, 2013
8511427 Blower arrangement Aug. 20, 2013
8485309 Apparatus and method for improving the damping of acoustic waves Jul. 16, 2013
8485310 Silencing equipment for electric devices Jul. 16, 2013
8453792 Exhaust system and corresponding support structure Jun. 4, 2013
8439158 Acoustic resonator and sound chamber May. 14, 2013
8418804 Multiple Helmholtz resonators Apr. 16, 2013
8413430 Metering module with improved acoustic properties Apr. 9, 2013
8408357 Air duct attenuator Apr. 2, 2013
8393437 Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator Mar. 12, 2013
8381871 Compact low frequency resonator Feb. 26, 2013
8359836 Internal combustion engine, vehicle, marine vessel, and secondary air supply method for internal combustion engine Jan. 29, 2013
8322486 Intake sound generation apparatus for internal combustion engine Dec. 4, 2012
8316639 Internal combustion engine, vehicle, marine vessel, and exhaust gas cleaning method for internal combustion engine Nov. 27, 2012
8316987 Muffling structure of vent pipe and muffling structure of case Nov. 27, 2012
8312713 Internal combustion engine, vehicle, marine vessel, and exhausting method for internal combustion engine Nov. 20, 2012
8307945 Gas-turbine exhaust cone Nov. 13, 2012
8205715 Muffler combination Jun. 26, 2012
8177024 Accoustic attenuation device for an intake line of a combustion engine and intake line incorporating same May. 15, 2012
8136628 Exhaust system for motorcycle Mar. 20, 2012
8113313 Pipe assembly with scoop for directing fluid into a standpipe and for mitigating acoustic and vortex coupled resonance Feb. 14, 2012
8087493 Sound absorber for a pipe-shaped, cavity-forming body Jan. 3, 2012
8033358 Noise controlled turbine engine with aircraft engine adaptive noise control tubes Oct. 11, 2011
7997382 Exhaust device for straddle-type vehicle and straddle-type vehicle Aug. 16, 2011
7992676 Compact tuned acoustic attenuation device Aug. 9, 2011
7975802 Intake air sound generation device Jul. 12, 2011
7946382 Gas compressor with side branch absorber for pulsation control May. 24, 2011
7946383 Acoustic load mitigator May. 24, 2011
7942236 Exhaust device for straddle-type vehicle and straddle-type vehicle May. 17, 2011
7942239 Exhaust muffler May. 17, 2011
7934581 Broadband noise resonator May. 3, 2011
7926615 Method of making an exhaust-noise attenuation muffler, and exhaust-noise attenuation muffler Apr. 19, 2011
7905319 Venturi muffler Mar. 15, 2011
7886870 Exhaust apparatus for small boat Feb. 15, 2011
7878300 Integrated modular exhaust system Feb. 1, 2011
7874401 Exhaust muffler for exhaust system Jan. 25, 2011
7870930 Exhaust system with external helmholtz resonator and associated method Jan. 18, 2011
7857094 Combustion chamber for a gas turbine engine Dec. 28, 2010
7854297 Muffler and related systems Dec. 21, 2010
7845466 Sound generator with structurally and acoustically coupled sound radiation panel and method for manufacturing the same Dec. 7, 2010
7810609 Muffler Oct. 12, 2010
7798286 Exhaust muffler having a horizontally extending sound attenuation chamber Sep. 21, 2010
7794213 Integrated acoustic damper with thin sheet insert Sep. 14, 2010
7784586 Noise reduction structure for hybrid vehicle Aug. 31, 2010
7779822 Intake assembly with integral resonators Aug. 24, 2010
7779963 Exhaust system for motorcycle Aug. 24, 2010

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