Class 181/283 - Air or liquid cooled

Subclass of Class 181 - Acoustics
Definition: Subject matter having a chamber or other structure for providing
No. of patents: 29
Last issue date: 06/24/2008

Number	Title	Issue Date
7389852	Integrated heat exchanger and muffler unit An integrated heat exchanger and muffler unit (50,120,140) is provided for transferring heat between a first fluid and a second fluid, and for muffling the noise of the first fluid. The unit includes a housing (52) including a first inlet (60) f...	06/24/2008
7374016	Muffler device To provide a muffler device capable of improving the discharge of exhaust gas, while discharging the exhaust gas in any desired direction. The muffler device is connected to a rear end portion of an exhaust pipe extending from an internal combustion engine of a vehi...	05/20/2008
7320299	Cooling system for liquid-cooled machines A cooling system for an engine of a lawnmower. The engine has a muffler through which exhaust gases exit the engine and is cooled by a liquid coolant. The cooling system includes a heat exchanger operatively connected to the engine to receive the liquid coolant from...	01/22/2008
7147074	Snowmobile A snowmobile including a chassis, shell, and an engine. The shell may be fixed to a front portion of the chassis and extend away from the chassis in a forward direction. The shell may be disposed forward of the steering axis. The shell may define a chamber that flui...	12/12/2006
6978605	Exhaust emission control system for engine In an exhaust emission control system for an engine, comprising an exhaust emission control catalyst disposed in an exhaust muffler whose inside is divided into a plurality of chambers, at least a portion of the inside of the exhaust muffler is divided into a first ...	12/27/2005
6910550	Muffler arrangement for an internal combustion engine A muffler arrangement includes an exhaust-gas muffler, which is subdivided into an inlet space and an outlet space. An exhaust-gas stub of an internal combustion engine opens into the inlet space. Exhaust gas is conducted from the outlet space into an air channel vi...	06/28/2005
6781829	Device for reducing the noise level of a component with moving parts and for cooling the same The invention pertains to a device for reducing the noise level of, and for cooling, a Component (1) with moving parts, such as a hard disk in a PC system. The device comprises a Container (2) in which Component (1) is arrayed and in whic...	08/24/2004
6422338	Exhaust gas muffler for internal combustion engines An exhaust gas muffler is provided for an internal combustion engine, especially for two-stroke engines of manually guided implements such as power chain saws, brush cutters or the like. The muffler has a housing that includes two shells. One of the shell...	07/23/2002
6152258	Exhaust system with silencing and water separation capability An exhaust system is provided with a structure that separates water from an exhaust stream and also attenuates the noise of the exhaust system. Water laden exhaust is directed from an inlet conduit through a perforated surface to precipitate water from th...	11/28/2000
5971097	Muffler for motor vehicles The present invention relates to a muffler used in a motor vehicle for cooling the engine exhaust gases. The muffler has an internal tubular member defining an internal chamber and a middle tubular member concentric in relation to and supported on the int...	10/26/1999
5738184	Muffler for a two-stroke engine A muffler for a two-stroke internal combustion engine has an expansion chamber into which a rush of exhaust gas is introduced from the engine. In the vicinity of an exhaust gas inlet from the engine into the expansion chamber, the muffler has an external ...	04/14/1998
5326942	Noise suppression muffler for moisture laden exhaust gases & method A muffler is provided for sound dampening of wet exhaust gases. The muffler comprises a canister, or housing, having an inlet and an outlet. The housing is preferably constructed of a plurality of resealable interlocking sections which can be disengaged f...	07/05/1994
5314009	Exhaust gas recuperator The cylindrical enclosure 12 of a recuperator 10 as in FIG. 2 contains an annular coaxial heat exchanger 50 full of cooling liquid 22 circulating therethrough. Exhaust gas from an internal combustion engine flows from an inlet end 32 through the heat exch...	05/24/1994
5228530	Muffler system for an engine disposed rearwardly of a vehicle A lawn mower having a driver's seat mounted on a vehicle body, an engine mounted rearwardly of the driver's seat, a radiator and a radiator fan disposed between the driver's seat and engine, an engine hood for covering the engine and radiator, and a muffl...	07/20/1993
5220137	Engine exhaust muffler A muffler for muffling engine operating sounds and including a cylindrical shell closed at opposite ends by double-walled closure caps. The space within the shell is partitioned into three axially contiguous chambers. A gas charging pipe projects through ...	06/15/1993
5211013	Muffler heat shield and method of attachment A nonmetal heat shield that is removably attachable directly to a muffler shell for preventing inadvertent contact with the hot shell surfaces of the muffler. The heat shield includes a plurality of raised boss portions for attaching the heat shield to th...	05/18/1993
4741411	Muffler system An improved muffler system for mounting within a restricted engine compartment such as the engine compartment of a small off-road vehicle including a muffler surrounded by a heat shield having a plurality of apertures formed therein for selectively coolin...	05/03/1988
4694894	Heat exchangers A heat exchanger which includes a casing having an outer tube and an inner tube fixed therein. Holes are formed in the inner tubes and face a heat transfer surface of the outer tube. Hot exhaust gas may be passed from an inlet of the outer tube into the i...	09/22/1987
4656713	Method for forming an air gap pipe A process and an apparatus for forming an air gap pipe are provided. Inner and outer pipes are bent or deformed into comparable configurations such that the inner pipe can be mounted within the outer pipe. The outer pipe then is split longitudinally by a ...	04/14/1987
4656712	Method for manufacturing a heat shielded exhaust system component A method is provided for manufacturing a heat shield for an exhaust system component. The exhaust system component preferably is of tubular nonlinear configuration. The heat shield is formed from a larger pipe having an internal diameter greater than the ...	04/14/1987
4622923	Encased engine generator This invention relates to an encased engine generator having an air-cooled engine and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, an engine hav...	11/18/1986
4621677	Heat exchanger for internal combustion engine exhaust, with noise suppressor A heat exchanger also serving for suppressing exhaust gas noise includes a water jacket, a water inlet header and a water outlet header together surrounding the exhaust gas flow space and a plurality heat exchanging water tubes connecting the inlet header...	11/11/1986
4590652	Method for fabricating an air gap pipe An air gap pipe and a method for forming the same are provided. The air gap pipe includes a non-linear outer pipe and an inner pipe of identical configuration disposed concentrically within the outer pipe. The inner pipe is supported by resilient dimples ...	05/27/1986
4493390	Apparatus for the combined production of electrical energy and heat The apparatus is enclosed in thermally and acoustically insulating panels supported by a framework. Each panel has a peripheral gasket which seals against adjacent surfaces of the framework to provide improved thermal and acoustic insulation....	01/15/1985
4487289	Exhaust muffler with protective shield An exhaust muffler having a protective shield to reduce noise radiation and to decrease the temperature of the exhaust gases being discharged from the muffler. The muffler is composed of an outer body enclosed at its ends by flanges, and an outer insulate...	12/11/1984
4450932	Heat recovery muffler A heat recovery muffler comprising an outer body and having an annular heat exchanger disposed within the body and spaced from the ends thereof. The heat exchanger is provided with a central opening and an exhaust gas inlet pipe is located within the cent...	05/29/1984
4265332	Heat extracting muffler system A muffler system positioned within the engine housing of the vehicle such as a garden tractor, includes a muffler surrounded by an open ended tubular heat shield having a venturi tube on its outer end which receives and accelerates the exhaust gases to cr...	05/05/1981
4184566	Marine engine noise suppressor A noise suppressor for internal combustion engine exhaust, adapted for marine use wherein water coolant is discharged into the chamber of a single-walled riser and partially vaporized by the exhaust gases directed into the dome thereof for downward redire...	01/22/1980
4051917	Sound-damping housing A sound-damping housing suitable for use with a piece of sound-generating equipment. The housing has inner and outer housing parts, the former forming a chamber for receiving the piece of sound-generating equipment, with the two housing parts forming betw...	10/04/1977

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Class 181/283 - Air or liquid cooled