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Class Information
Number: 181/264
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure
Description: Subject matter in which barriers or partitions cause the fluids to travel in a tortuous path.










Sub-classes under this class:

Class Number Class Name Patents
181/282 Casings 256
181/267 Coaxial foraminous walls 44
181/269 Expansion chamber type 156
181/277 Movable baffle 47
181/268 Multi-passage 179
181/281 Perpendicular and/or oblique 74
181/265 Retroverted 154
181/276 Side branch 93
181/279 Spiral 63


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8675357 Data center aisle containment system utilizing a movable sash that is integral to the computer rack cabinet Mar. 18, 2014
8668046 Baffle Mar. 11, 2014
8646260 Two-stroke lean burn gas engine with a silencer/catalytic converter Feb. 11, 2014
8640822 Exhaust muffler Feb. 4, 2014
8637414 Gradient density padding material and method of making same Jan. 28, 2014
8573355 Acoustic baffle device Nov. 5, 2013
8528693 Muffler with dual exhaust gas discharge pipe for vehicle Sep. 10, 2013
8496446 Compressor muffler Jul. 30, 2013
8469142 Muffler assembly Jun. 25, 2013
8469143 Baffle with enhanced acoustic damping properties Jun. 25, 2013
8424635 Firearm suppressor with relationally-rotated spacers disposed between baffles Apr. 23, 2013
8418805 Muffler for vehicle Apr. 16, 2013
8393147 Exhaust system having an aftertreatment module Mar. 12, 2013
8327975 Acoustic silencer Dec. 11, 2012
8312962 Sound absorber having helical fixtures Nov. 20, 2012
8307944 Muffler Nov. 13, 2012
8307949 Exhaust device Nov. 13, 2012
8302567 Cooling air passage for a motor chain saw Nov. 6, 2012
8248792 Container data center and air intake apparatus Aug. 21, 2012
8230968 Suction muffler for hermetic compressor Jul. 31, 2012
8196702 Muffler for vehicle Jun. 12, 2012
8196703 Exhaust component Jun. 12, 2012
8104572 Spin muffler Jan. 31, 2012
8083026 Diffuser muffler Dec. 27, 2011
8079442 Acoustic baffle Dec. 20, 2011
7992677 Motor vehicle exhaust line silencer Aug. 9, 2011
7980357 Exhaust silencer for microturbines Jul. 19, 2011
7975869 Fuel tank assembly with a baffle plate Jul. 12, 2011
7958966 Exhaust stack fairing Jun. 14, 2011
7942238 Marine muffler with angularly disposed internal baffle May. 17, 2011
7934582 Engine silencing and vibration reduction system and method May. 3, 2011
7905322 Marine muffler with angularly disposed internal baffle Mar. 15, 2011
7896130 Snap action valve with inertia damper Mar. 1, 2011
7823692 Muffler for engines in oilfield applications Nov. 2, 2010
7815012 Noise optimized air distributor Oct. 19, 2010
7793758 Triangular cross section exhaust muffler Sep. 14, 2010
7690194 Two-stroke lean burn gas engine with a silencer/catalytic converter Apr. 6, 2010
7677357 Muffler and vehicle equipped with muffler Mar. 16, 2010
7631726 Silencer for air induction system and high flow articulated coupling Dec. 15, 2009
7621373 Acoustic drain Nov. 24, 2009
7617675 Catalyst chamber Nov. 17, 2009
7584822 Noise level reduction of sparger assemblies Sep. 8, 2009
7581620 Marine muffler with angularly disposed internal baffle Sep. 1, 2009
7549512 Muffler for internal combustion engine Jun. 23, 2009
7536821 Cartridge casing catcher with reduced firearm ejection port flash and noise May. 26, 2009
7530428 Exhaust deflector for a muffler May. 12, 2009
7503427 Muffler Mar. 17, 2009
7487857 Sonic coupling between an intake tract or engine compartment and the interior of a motor vehicle Feb. 10, 2009
7485165 Air filtering device for protection suits Feb. 3, 2009
7478996 Reciprocating compressor having assembly structure of suction muffler Jan. 20, 2009

1 2 3 4 5










 
 
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