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Class Information
Number: 181/237
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With pressure relief safety valve
Description: Subject matter wherein there is provided a valve responsive to relieve excess pressure to the atmosphere.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8657065 Exhaust valve with resilient spring pad Feb. 25, 2014
8636103 Muffler for vehicle Jan. 28, 2014
8540051 Silencer for a two-stroke motor of a power tool Sep. 24, 2013
8468813 Snap-action valve for exhaust system Jun. 25, 2013
8439156 Muffler with controlled pressure release May. 14, 2013
8397863 Muffler with a built-in heat exchanger Mar. 19, 2013
8393147 Exhaust system having an aftertreatment module Mar. 12, 2013
8292024 Retainer device for a reducing agent metering valve Oct. 23, 2012
8201660 Valve for a motor vehicle exhaust silencer, and silencer comprising a valve of this type Jun. 19, 2012
8181737 Condensed water discharge apparatus of muffler May. 22, 2012
8079441 Muffler Dec. 20, 2011
8057194 Compressor with discharge muffler attachment using a spacer Nov. 15, 2011
8056673 Sound dampening and wear protecting flapper configuration for marine exhaust system Nov. 15, 2011
8033359 Intake sound adjusting device Oct. 11, 2011
8028799 Damping device and method for damping sound in cavities of vehicles Oct. 4, 2011
7967107 Muffler apparatus for vehicle Jun. 28, 2011
7938227 Variable resonation chamber valve May. 10, 2011
7938226 Exhaust system for internal combustion engine having temperature variable acoustics May. 10, 2011
7913809 Flapper configuration for marine exhaust system Mar. 29, 2011
7913810 High-performance muffler assembly with multiple modes of operation Mar. 29, 2011
7905320 Exhaust system for saddle-ride type vehicle Mar. 15, 2011
7896130 Snap action valve with inertia damper Mar. 1, 2011
7871729 System and method for mixing gases in a fuel cell exhaust system Jan. 18, 2011
7849959 Exhaust pipe structure for vehicle Dec. 14, 2010
7828114 Exhaust device for motorcycle engine Nov. 9, 2010
7779961 Exhaust gas diffuser Aug. 24, 2010
7779962 Muffler Aug. 24, 2010
7775322 Snap-action valve for exhaust system Aug. 17, 2010
7753168 Muffler Jul. 13, 2010
7730995 Acoustic apparatus Jun. 8, 2010
7726442 Baffle equipped with flap assembly Jun. 1, 2010
7673720 High-performance muffler assembly with multiple modes of operation Mar. 9, 2010
7610993 Flow-through mufflers with optional thermo-electric, sound cancellation, and tuning capabilities Nov. 3, 2009
7537084 Discharge gas check valve integral with muffler May. 26, 2009
7451854 Exhaust flow rate control valve Nov. 18, 2008
7438157 Muffler for an exhaust gas system Oct. 21, 2008
7428947 Electrically controlled in-muffler exhaust valve for use during cylinder deactivation Sep. 30, 2008
7426979 Exhaust gas control valve Sep. 23, 2008
7364010 Exhaust system for a motorcycle, and motorcycle including same Apr. 29, 2008
7350349 Method and device of a particle filter for an exhaust system, silencer including such a device, and a combustion engine driven vehicle Apr. 1, 2008
7337609 Diesel exhaust system variable backpressure muffler Mar. 4, 2008
7325651 Motorcycle exhaust system Feb. 5, 2008
7310942 Exhaust passage control valve Dec. 25, 2007
7273130 Device and method for active soundproofing, and power unit for aeroplanes Sep. 25, 2007
7240768 Flapper finger valve Jul. 10, 2007
7182171 Muffler with variable acoustic properties Feb. 27, 2007
7090048 Method and apparatus for exhaust sound attenuation on engines with cylinder deactivation Aug. 15, 2006
7066296 Valve device for silencer Jun. 27, 2006
6938729 Exhaust gas system Sep. 6, 2005
6918463 Muffler for engine Jul. 19, 2005

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