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| Number | Title | Issue Date |
| 8136627 | Exhaust silencer device for internal combustion engine An exhaust silencer device for an internal combustion engine which includes: an exhaust pipe (10) that forms an exhaust passage from an engine (1), and an exhaust opening; and a muffler (22) attached to the exhaust pipe (10) so as to sile... | 03/20/2012 |
| 7650965 | Exhaust system An exhaust system for an engine includes a first muffler having a housing, a first end plate, a second end plate, an inlet pipe extending through at least one of the first end plate and the second end plate, and an outlet pipe extending through at least one of the f... | 01/26/2010 |
| 7416050 | Gas expansion silencer A gas expansion silencer comprising an endpiece for being connected to a source of gas under pressure, and a low-pressure stage comprising two cylindrical portions respectively of smaller diameter and of larger diameter, the smaller-diameter portion being connected ... | 08/26/2008 |
| 7380572 | Energy attenuation apparatus for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit An energy attenuation apparatus in fluid communication with tubing adapted to convey a liquid under pressure, and including a liquid-conveying unit in fluid communication with the tubing and having a diameter greater than the tubing diameter. The liquid-conveying un... | 06/03/2008 |
| 7364012 | Dual-neck plane wave resonator A resonator and method of designing a resonator including a cavity having an effective length that exceeds λ/8 such that a standing wave having an anti-node will form in the cavity. First and second necks each having first ends are attached to and in fluid communic... | 04/29/2008 |
| 7325474 | Silencer The present invention relates to a silencer easily cleanable inside. This silencer comprises a casing cylinder and a segment member housed in the casing cylinder to constitute a sound reducing means. The silencer further comprises a segment member fastening means fo... | 02/05/2008 |
| 7325570 | Method and apparatus for noise suppression in a fluid line An energy attenuation method and apparatus for a system conveying liquid under pressure. The apparatus is disposed in a liquid conveying structure of the system and includes first and second outer hose conduits, each of which respectively defines an associated first... | 02/05/2008 |
| 7303046 | Apparatus for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 12/04/2007 |
| 7303047 | Apparatus for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 12/04/2007 |
| 7303048 | Method for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 12/04/2007 |
| 7273592 | Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. The exhaust gas post treatment within the muffler, which forms sulfuric acid, takes place in at least one exhaust gas post treatment/muff... | 09/25/2007 |
| 7249613 | Energy attenuation device An energy attenuation device for a conduit that is adapted to convey a pressurized fluid therethrough, comprising a hose section disposed about a portion of the conduit, wherein such conduit portion is provided with at least one aperture, for example in a surface th... | 07/31/2007 |
| 7240769 | Exhaust volume An exhaust volume (20) of the type including a muffler (24) having a casing provided with an inlet (29) and an outlet (30) for passing gases and adapted to enable the muffler to be mounted in an exhaust system (14). The volume furt... | 07/10/2007 |
| 7210912 | Reciprocating piston compressor having improved noise attenuation A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap... | 05/01/2007 |
| 7174992 | Muffler with secondary flow path A muffler has a main body, and an inner shell spaced radially inwardly of the main body by an annular volume therebetween. The inner shell has an internal volume radially inward of the annular volume. The muffler has primary and secondary parallel paths therethrough... | 02/13/2007 |
| 7131287 | Air conditioning system with vibration dampening device A device is provided for dampening compressor-induced vibration in an air conditioning system of the type having an indoor unit, an outdoor unit and a refrigerant conduit therebetween. The outdoor unit includes a compressor that is operable to circulate a vapor comp... | 11/07/2006 |
| 7104358 | Silencer containing one or more porous bodies A silencer for silencing and also for filtering exhaust gases, contains at least one acoustic resonator chamber (13, 14, 15, 16) (Helmholtz frequency), at least one porous body (7, 8) the porous body (7, 8) occupying at least part of the chamber... | 09/12/2006 |
| 7086497 | Induction system with low pass filter for turbo charger applications A flow tube for an induction system with a turbo charger includes a first tube half and a second tube half with a noise attenuation plate positioned between the halves. The noise attenuation plate includes a plurality of holes having varying diameters and depths. Th... | 08/08/2006 |
| 7036530 | Energy attenuation device for a fluid-conveying line and method of attenuating energy in such a line An energy attenuation device for a fluid-conveying line, and a method for attenuating energy in such a line, are provided. The device includes one or more hose sections disposed in the fluid-conveying line, and at least one spring disposed in at least a portion of e... | 05/02/2006 |
| 7021420 | System and method for phased noise attenuation A method and system for attenuating noise including arranging a plurality of accumulators (210, 310) to form a transmittance path for compressible flow mass and noise between a noise source (212, 312) and the external environment (218, 318), and... | 04/04/2006 |
| 7011180 | System for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 03/14/2006 |
| 7007718 | Energy attenuation apparatus for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit An energy attenuation apparatus for a system conveying a liquid under pressure is provided. The apparatus includes a liquid-conveying unit or the like that includes three chambers disposed in series. At least one of the chambers contains no tube. A first tube is dis... | 03/07/2006 |
| 6983820 | Noise and vibration suppressors In order to form a noise suppressor in a hose of e.g. a motor vehicle, modular portions are connected in series to define suppression chambers with particular noise suppression characteristics. Those characteristics are due to the volume of each chamber, to the size... | 01/10/2006 |
| 6938729 | Exhaust gas system An exhaust gas system for an internal combustion engine, in particular, of a motor vehicle has two mufflers through which the exhaust gas is able to flow in a parallel fashion. A switching unit makes it possible to selectively convey the exhaust gas flow of the inte... | 09/06/2005 |
| 6932189 | Device for noise structuring in a motor vehicle A device for noise structuring in a motor vehicle has a plurality of gas-carrying lines connected to an internal combustion engine. At least two of the gas-carrying lines are acoustically linked together by at least one connection. ... | 08/23/2005 |
| 6926117 | Muffler for pneumatic hand tool A muffler for quieting the operation of a pneumatic tool. In one embodiment the muffler (630) is disposed within a volume defined by a peripheral wall (612) that receives an exhaust stream. An upper plate (631) having several open tubes (632 | 08/09/2005 |
| 6918463 | Muffler for engine A muffler comprises a casing and an exhaust pipe penetrating the casing. An exhaust gas chamber 4 is defined between the outer wall surface of the exhaust pipe and the inner wall surface of the casing. In the exhaust pipe positioned in the casing, an enlarged... | 07/19/2005 |
| 6880670 | Muffler for suction system exhaust air used with an automatic cutting machine A noise reduction system for significantly reducing the noise generated by an air turbine used to create suction for automatic cutting tables. The system employs one or more baffles mounted within a closed main housing including noise reduction foam and an exhaust h... | 04/19/2005 |
| 6802387 | Muffler with external water trap A vertical mount muffler (40) has an external water trap (52) in an exhaust pipe (48) and drains water from a point between the muffler housing upper outlet (46) and the terminal end (50) of the exhaust pipe. The water trap (52 | 10/12/2004 |
| 6755279 | Controllable muffler system for internal combustion engine A controllable muffler system is sued for use with an engine that produces a power by burning fuel. The system comprises a first passage section extending from the engine for having an exhaust gas of the engine flow therethrough. The first passage section has a cata... | 06/29/2004 |
| 6722467 | Noise attenuator for an air supply system of an internal combustion engine A sound attenuation system for a compressor of a direct fuel injected engine of an outboard motor comprises a discharge sound attenuator connected in fluid communication with an air distribution manifold outlet and a suction sound attenuator connected in fluid commu... | 04/20/2004 |
| 6675933 | Exhaust system for motorcycle An exhaust pipe is branched into a right side connecting portion and a connecting portion. The right side connecting portion is connected to a first muffler while the connecting portion is connected to a second muffler through a space under a boundary bet... | 01/13/2004 |
| 6644436 | Device for noise configuration in a motor vehicle A device for noise configuration in a motor vehicle has a hollow body which is divided into at least two spaces. One space is connected to a gas-carrying part of an internal combustion engine arranged in the motor vehicle, and the other space is coupled a... | 11/11/2003 |
| 6454047 | System and method for phases noise attenuation A method and system for attenuating noise including arranging a plurality of accumulators (210, 310) to form a transmittance path for compressible flow mass and noise between a noise source (212, 312) and the external environment (218, 318), and selective... | 09/24/2002 |
| 6382348 | Twin muffler A twin muffler includes two muffling units connected in parallel to the exhaust post of an engine through a manifold, each muffling unit having a front accumulation chamber, a rear accumulation chamber, a perforated inner tube connected between the front ... | 05/07/2002 |
| 6338363 | Energy attenuation device for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit An energy attenuation device for a conduit conveying a liquid under pressure, a system incorporating same, and a method for attenuating energy in a conduit, are provided. The device includes a conduit, a restrictor disposed in the conduit and dividing the... | 01/15/2002 |
| 6290557 | Exhaust system for jet propulsion boat An exhaust system for a jet propulsion boat and a jet propulsion boat including the exhaust system. The exhaust system includes a muffler connected to the boat's engine by an exhaust pipe, and an auxiliary muffler connected to the muffler by a first conne... | 09/18/2001 |
| 6167984 | Device and a method for sound reduction in a transport system for gaseous medium and use of the device in an exhaust system for ships A device and a method for achieving sound reduction within a frequency band in a transport system for gaseous medium, the transport system being arranged between an inlet, which is connected to a sound source, and an outlet. The transport system comprises... | 01/02/2001 |
| 6073656 | Energy attenuation device for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit An energy attenuation device for a conduit conveying liquid under pressure, a system incorporating same, and a method for attenuating energy in a conduit, are provided. The device includes a conduit that is disposed in or is part of the liquid-conveying c... | 06/13/2000 |
| 6050362 | Exhaust system with seamed roll joints and method for manufacture An exhaust system structure and method comprising two or more silencers which are placed in series and are each provided with a tubular section, the edges of which are in each case attached to a transverse plate which marks the end of the section in quest... | 04/18/2000 |
