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Class Information
Number: 181/216
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Reaction engine type > With adjustable outlet nozzle > Longitudinally adjustable section
Description: Subject matter wherein the tail end sections are adjustable longitudinally of the shroud in the downstream direction.










Patents under this class:

Patent Number Title Of Patent Date Issued
8661822 Acoustically stiffened gas turbine combustor supply Mar. 4, 2014
8408356 Storage box for electronic apparatus Apr. 2, 2013
8068575 Acoustic load mitigator Nov. 29, 2011
8006800 Storage box for electronic apparatus Aug. 30, 2011
7958965 Storage box for electronic apparatus Jun. 14, 2011
7946383 Acoustic load mitigator May. 24, 2011
7905318 Storage box for electronic apparatus Mar. 15, 2011
7621371 Method for attenuating the noise of a turbofan Nov. 24, 2009
7533760 Noise reduction tubes May. 19, 2009
7497300 Noise reduction tubes Mar. 3, 2009
7350619 Auxiliary power unit exhaust duct with muffler incorporating an externally replaceable acoustic liner Apr. 1, 2008
7234297 Motorcycle exhaust enhancers Jun. 26, 2007
7055648 Assembly and method for fan noise reduction from turbofan engines using dynamically adaptive Herschel-Quincke tubes Jun. 6, 2006
7021052 Motorcycle exhaust control system Apr. 4, 2006
6896100 Noise reducing apparatus and exhaust nozzle for jet engine May. 24, 2005
6848252 Exhaust enhancement for aftermarket motorcycle exhaust pipes with a straight pipe type design and with inside pipe diameter from 1.875" and larger Feb. 1, 2005
5717172 Sound suppressor exhaust structure Feb. 10, 1998
5636286 Active noise reduction device for electronic apparatus Jun. 3, 1997
4909346 Jet engine noise suppression system Mar. 20, 1990
4049220 Ejector sleeves for aircraft mounted gas turbine engines Sep. 20, 1977
3964568 Gas turbine engine noise shield Jun. 22, 1976











 
 
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