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Class Information
Number: 181/255
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > Straight-through passage > Expansion chamber
Description: Subject matter having enlarged chambers intermediate the length of the through passage.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7426980 |
Internal combustion engine exhaust system |
Sep. 23, 2008 |
| 7389852 |
Integrated heat exchanger and muffler unit |
Jun. 24, 2008 |
| 7387188 |
Sound absorber |
Jun. 17, 2008 |
| 7384609 |
Pre-converter device for cleaning exhaust gas for an internal combustion engine |
Jun. 10, 2008 |
| 7383919 |
Rotatable propeller driven engine exhaust system |
Jun. 10, 2008 |
| 7377359 |
Device for modulating noise in a motor vehicle |
May. 27, 2008 |
| 7367424 |
Eccentric exhaust muffler for use with auxiliary power units |
May. 6, 2008 |
| 7364013 |
Shell main body for muffler |
Apr. 29, 2008 |
| 7334402 |
Exhaust system with catalytic converter and motorcycle using the same |
Feb. 26, 2008 |
| 7308967 |
Sound suppressor |
Dec. 18, 2007 |
| 7293628 |
Shell main body for muffler |
Nov. 13, 2007 |
| 7287622 |
Exhaust muffler |
Oct. 30, 2007 |
| 7278514 |
Acoustic noise filter |
Oct. 9, 2007 |
| 7273130 |
Device and method for active soundproofing, and power unit for aeroplanes |
Sep. 25, 2007 |
| 7261755 |
Heat-resistant filter layer, filter body, and process for producing the filter layer and the filter body |
Aug. 28, 2007 |
| 7255197 |
Muffler |
Aug. 14, 2007 |
| 7243757 |
Exhaust muffler |
Jul. 17, 2007 |
| 7174992 |
Muffler with secondary flow path |
Feb. 13, 2007 |
| 7159692 |
Silencer |
Jan. 9, 2007 |
| 7044266 |
Exhaust muffler for internal combustion engines |
May. 16, 2006 |
| 7017610 |
Damper for hydraulic systems |
Mar. 28, 2006 |
| 6988057 |
Methods for designing a chamber to reduce noise in a duct |
Jan. 17, 2006 |
| 6968922 |
Exhaust apparatus for vehicle |
Nov. 29, 2005 |
| 6948585 |
Acoustic wave attenuator for a rail |
Sep. 27, 2005 |
| 6941751 |
Exhaust muffler and muffler system for use with an internal combustion engine |
Sep. 13, 2005 |
| 6932188 |
Silencer for vacuum cleaner |
Aug. 23, 2005 |
| 6905002 |
Acoustic wave attenuator for a rail |
Jun. 14, 2005 |
| 6892853 |
High performance muffler |
May. 17, 2005 |
| 6892854 |
Muffler with catalytic converter arrangement; and method |
May. 17, 2005 |
| 6789644 |
Engine muffler |
Sep. 14, 2004 |
| 6764632 |
Energy attenuation restrictor device and method of forming such restrictor device |
Jul. 20, 2004 |
| 6742623 |
Muffler for internal combustion engine |
Jun. 1, 2004 |
| 6722467 |
Noise attenuator for an air supply system of an internal combustion engine |
Apr. 20, 2004 |
| 6695094 |
Acoustic muffler for turbine engine |
Feb. 24, 2004 |
| 6688423 |
Fluid-borne noise suppression |
Feb. 10, 2004 |
| 6681888 |
Silencing apparatus, notably for a turbo engine |
Jan. 27, 2004 |
| 6681889 |
Exhaust muffler for a fuel-operated heating device |
Jan. 27, 2004 |
| 6668972 |
Bumper/muffler assembly |
Dec. 30, 2003 |
| 6591870 |
Energy attenuation restrictor device and method of forming such restrictor device |
Jul. 15, 2003 |
| 6564902 |
Device and method for a sound-attenuating unit |
May. 20, 2003 |
| 6550573 |
Muffler with catalytic converter arrangement, and method |
Apr. 22, 2003 |
| 6478053 |
Pressure-pulsation-damping fluid supply conduit |
Nov. 12, 2002 |
| 6470998 |
Modular muffler with end plate adaptors and spark arresters |
Oct. 29, 2002 |
| 6467570 |
Spark arrester with spark filter |
Oct. 22, 2002 |
| 6454047 |
System and method for phases noise attenuation |
Sep. 24, 2002 |
| 6443255 |
Marine muffler |
Sep. 3, 2002 |
| 6374944 |
Silencer with internal rain diverter |
Apr. 23, 2002 |
| 6341663 |
Silencer with a shunt resonator |
Jan. 29, 2002 |
| 6283246 |
Silencer |
Sep. 4, 2001 |
| 6260659 |
Silencer for internal combustion engine |
Jul. 17, 2001 |
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