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Class Information
Number: 181/274
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With baffle or baffle structure > Expansion chamber type > With centrifugal flow
Description: Subject matter in which the inlet to the expansion chamber and the baffles are in such direction as to impel the fluid into a circular flow.










Patents under this class:

Patent Number Title Of Patent Date Issued
8602159 Compact muffler for small two-stroke internal combustion engines Dec. 10, 2013
8459408 Radiated sound reducing structure Jun. 11, 2013
8434589 Obstruction device for reducing noise emitted from a blower May. 7, 2013
8381870 Fluid flow controller Feb. 26, 2013
8307945 Gas-turbine exhaust cone Nov. 13, 2012
8104572 Spin muffler Jan. 31, 2012
8057200 Structure of discharging refrigerant for linear compressor Nov. 15, 2011
7854297 Muffler and related systems Dec. 21, 2010
7845464 Noise abatement device for a pneumatic tool Dec. 7, 2010
7735603 Noise reducing device for a pneumatic tool Jun. 15, 2010
7681690 Noise abatement device for a pneumatic tool Mar. 23, 2010
7644804 Sound attenuator Jan. 12, 2010
7571789 Muffler for exhaust systems of vehicles Aug. 11, 2009
7380639 Backpressure reducing exhaust system with stationary blade structure Jun. 3, 2008
7350620 Compact silencer Apr. 1, 2008
7331422 Vortex muffler Feb. 19, 2008
7052247 Suction muffler for compressors, compressor with the suction muffler, and apparatus having refrigerant circulation circuit including the compressor May. 30, 2006
5670757 Exhaust silencer for engines and generators Sep. 23, 1997
5669762 Sound and pulsation reducing outlet chamber for an air compressor Sep. 23, 1997
4747761 Silencer-carrying rotary vane pump May. 31, 1988
4685534 Method and apparatus for control of fluids Aug. 11, 1987
4655694 Housing assembly for motor/fan means of a wet/dry vacuum cleaner Apr. 7, 1987
4623035 Muffler of the sound reflecting type for use with internal combustion engines Nov. 18, 1986
4538701 Muffler Sep. 3, 1985
4346783 Apparatus for treating flowing working gases particularly to reduce the noise in operation thereof Aug. 31, 1982
4285916 Exhaust gas pollution control system Aug. 25, 1981
4162904 Silencer-separator device Jul. 31, 1979
4147230 Combination spark arrestor and aspirating muffler Apr. 3, 1979
4105089 Flow distributor for gas turbine silencers Aug. 8, 1978
3970167 Rotary flow muffler Jul. 20, 1976
3963092 Exhaust muffler for competition car engines Jun. 15, 1976











 
 
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