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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 7448469 |
Silencer |
Nov. 11, 2008 |
| 7389852 |
Integrated heat exchanger and muffler unit |
Jun. 24, 2008 |
| 7387188 |
Sound absorber |
Jun. 17, 2008 |
| 7380638 |
Exhaust noise control for motorcycles |
Jun. 3, 2008 |
| 7381032 |
Hermetic compressor and freezing air-conditioning system |
Jun. 3, 2008 |
| 7380635 |
Interference-based exhaust noise attenuation |
Jun. 3, 2008 |
| 7367424 |
Eccentric exhaust muffler for use with auxiliary power units |
May. 6, 2008 |
| 7364012 |
Dual-neck plane wave resonator |
Apr. 29, 2008 |
| 7364013 |
Shell main body for muffler |
Apr. 29, 2008 |
| 7357220 |
Systems and methods for controlling acoustical damping |
Apr. 15, 2008 |
| 7337876 |
Suction apparatus with noise reduction means |
Mar. 4, 2008 |
| 7337877 |
Variable geometry resonator for acoustic control |
Mar. 4, 2008 |
| 7334663 |
Variable resonator |
Feb. 26, 2008 |
| 7316291 |
Suction muffler for a hermetic refrigerant compressor |
Jan. 8, 2008 |
| 7299894 |
Acoustic fluid machine |
Nov. 27, 2007 |
| 7293627 |
Active exhaust muffler |
Nov. 13, 2007 |
| 7293628 |
Shell main body for muffler |
Nov. 13, 2007 |
| 7281605 |
Mufflers with enhanced acoustic performance at low and moderate frequencies |
Oct. 16, 2007 |
| 7278514 |
Acoustic noise filter |
Oct. 9, 2007 |
| 7255197 |
Muffler |
Aug. 14, 2007 |
| 7252178 |
Acoustic fluid machine |
Aug. 7, 2007 |
| 7246680 |
Sound dampening assembly for automotive exhaust system |
Jul. 24, 2007 |
| 7240769 |
Exhaust volume |
Jul. 10, 2007 |
| 7194862 |
Resonator adopting counter-bored holes and method of suppressing combustion instabilities |
Mar. 27, 2007 |
| 7117974 |
Electronically controlled dual chamber variable resonator |
Oct. 10, 2006 |
| 7090048 |
Method and apparatus for exhaust sound attenuation on engines with cylinder deactivation |
Aug. 15, 2006 |
| 7017707 |
Herschel-Quincke tube for vehicle applications |
Mar. 28, 2006 |
| 6792907 |
Helmholtz resonator |
Sep. 21, 2004 |
| 6755279 |
Controllable muffler system for internal combustion engine |
Jun. 29, 2004 |
| 6742623 |
Muffler for internal combustion engine |
Jun. 1, 2004 |
| 6732509 |
Engine acoustical system |
May. 11, 2004 |
| 6698390 |
Variable tuned telescoping resonator |
Mar. 2, 2004 |
| 6675933 |
Exhaust system for motorcycle |
Jan. 13, 2004 |
| 6637545 |
Silencer |
Oct. 28, 2003 |
| 6609489 |
Apparatus and method for reducing engine noise |
Aug. 26, 2003 |
| 6595319 |
Muffler |
Jul. 22, 2003 |
| 6581722 |
Acoustic absorber and sound-absorption method |
Jun. 24, 2003 |
| 6533064 |
Noise reduction device for use in reciprocating compressor using a side-branch silencer |
Mar. 18, 2003 |
| 6530452 |
Reactive silencer for industrial air channels and its use |
Mar. 11, 2003 |
| 6508331 |
Variable resonator |
Jan. 21, 2003 |
| 6494290 |
Noise suppressor with a bypass resonator |
Dec. 17, 2002 |
| 6467570 |
Spark arrester with spark filter |
Oct. 22, 2002 |
| 6457552 |
Methods and apparatus for low back pressure muffling of internal combustion engines |
Oct. 1, 2002 |
| 6443255 |
Marine muffler |
Sep. 3, 2002 |
| 6439622 |
Structure for coupling two types of members |
Aug. 27, 2002 |
| 6164411 |
Suppression of acoustic cavity resonance induced by fluid flow |
Dec. 26, 2000 |
| 6148956 |
Resonator with high heat resistance |
Nov. 21, 2000 |
| 6112514 |
Fan noise reduction from turbofan engines using adaptive Herschel-Quincke tubes |
Sep. 5, 2000 |
| 5996733 |
Dual frequency side branch resonator |
Dec. 7, 1999 |
| 5925857 |
Inverted cone tuned exhaust system |
Jul. 20, 1999 |
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