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Class Information
Number: 181/260
Name: Acoustics > Sound-modifying means > Muffler, fluid conducting type > With disparate fluid mingling > Liquid
Description: Subject matter in which the added fluid is a liquid, usually water.










Sub-classes under this class:

Class Number Class Name Patents
181/261 Sprayed 13


Patents under this class:

Patent Number Title Of Patent Date Issued
7942238 Marine muffler with angularly disposed internal baffle May. 17, 2011
7918311 Muffler and engine exhaust apparatus Apr. 5, 2011
7559406 Acoustic fluid machine Jul. 14, 2009
6749397 Fluidal machine Jun. 15, 2004
6591939 Marine engine silencer Jul. 15, 2003
6564901 Muffler for marine engine May. 20, 2003
6273772 Apparatus and method for multi-conduit waterlift engine silencing Aug. 14, 2001
6224440 Watercraft exhaust system May. 1, 2001
6152258 Exhaust system with silencing and water separation capability Nov. 28, 2000
6024617 Marine engine silencing apparatus and method Feb. 15, 2000
5824970 Marine engine silencer having internal apertured baffle and weir plate Oct. 20, 1998
5746630 Combination wet marine exhaust muffler and water separator May. 5, 1998
5633481 Exhaust pipe construction May. 27, 1997
5554058 Marine engine exhaust system and associated method Sep. 10, 1996
5259797 Marine engine exhaust system and method Nov. 9, 1993
5147232 Marine engine exhaust system and method Sep. 15, 1992
4977977 Marine engine external exhaust noise suppressor with swim platform Dec. 18, 1990
4952182 Noise attenuating exhaust relief system for an outboard motor Aug. 28, 1990
4917640 Marine engine exhaust system and method Apr. 17, 1990
4865154 Muffler with drain holes Sep. 12, 1989
4779704 Draining device for muffler of small planing boat Oct. 25, 1988
4737886 Method and apparatus for electrically altering properties of a colloidal suspension containing elongated fibrous particles Apr. 12, 1988
4643272 Marine muffler for water-cooled internal combustion engines Feb. 17, 1987
4428453 Exhaust silences for internal combustion engines Jan. 31, 1984
4393956 Draining device used in a car-muffler Jul. 19, 1983
4350010 Exhaust system for an outboard engine Sep. 21, 1982
4310067 Optimized diesel engine exhaust silencer Jan. 12, 1982











 
 
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