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| Number | Title | Issue Date |
| 7721845 | Exhaust muffler In order to provide an exhaust muffler for an internal combustion engine, especially a portable implement, comprising a catalyst which is arranged in a housing which has at least one inlet opening and one outlet opening for exhaust gas flowing out from the internal ... | 05/25/2010 |
| 7549512 | Muffler for internal combustion engine The improved muffler design has a housing that is hexagonal in shape that is formed from an upper plate, a lower plate and sidewalls that form a perimeter around the housing. An inlet and outlet are attached to opposite sides of the housing along the length. A prima... | 06/23/2009 |
| 7350620 | Compact silencer There is disclosed a silencer for attenuating sound waves produced in a fluid that circulates through a fluid conveyer. The silencer comprises an expansion chamber that is in fluid communication with the fluid conveyer, and which carries sound waves there through; a... | 04/01/2008 |
| 7217168 | Engine exhaust system An engine exhaust system has an exhaust gas passage and a coolant passage. The coolant passage surrounds at least a portion of the exhaust passage. The system is also equipped with an exhaust conduit, which mixes exhaust gases and coolant and then releases the mixtu... | 05/15/2007 |
| 7153107 | Compressor muffler assembly A muffler assembly for a compressor that suppresses noise that would otherwise escape from the inlet of the compressor during its operation. The muffler assembly includes an intake conduit that has an inlet portion, an outlet portion adapted to couple to an inlet of... | 12/26/2006 |
| 7152710 | Self-powered, heat-activated LED vehicle exhaust tip assembly A self-powered, heat-activated LED exhaust tip assembly (10) that is comprised of three major elements: a cylindrical enclosure (12), a heat conducting sub-assembly (80) and an electronics circuit (130). The sub-assembly (80) consi... | 12/26/2006 |
| 7104359 | Muffler having a baffle with angled plates A muffler having a baffle with angled plates includes a one piece baffle, a container and two end caps. The one piece baffle has at least three different configurations. The baffle preferably has two, three or four plates, namely “V”, “Z” or “W” shapes. ... | 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 |
| 7029242 | Hermetic compressor with one-quarter wavelength tuner A compressor including a housing defining an interior plenum; a refrigerant received within the interior plenum and having a resonant wavelength; a motor disposed within the housing; a compression mechanism disposed within the housing and operably connected to the m... | 04/18/2006 |
| 6953104 | Muffin fan hush hood A low noise method and apparatus with the apparatus including a hood for mounting over an exhaust outlet duct to capture a fluid stream and then redirect the fluid stream to a fluid outlet in the hood through the use of smoothly curving duct that maintains the fluid... | 10/11/2005 |
| 6942061 | Muffler for internal combustion engine A performance muffler suitable for installation into an exhaust system for an internal combustion engine wherein either end of the muffler may be designated as the entrance end for the receipt of exhaust gases into the muffler without materially altering the functio... | 09/13/2005 |
| 6932188 | Silencer for vacuum cleaner A silencer for a vacuum cleaner is provided and includes at least one hermetic expansion chamber mounted in an exhaust channel of the vacuum cleaner and allowing an exhaust airflow from the vacuum cleaner to pass through. The expansion chamber at its two sides has a... | 08/23/2005 |
| 6796403 | Exhaust system baffling apparatus An exhaust system baffling apparatus is provided. The apparatus includes a tube with at least one end that is not open. The apparatus further includes a plurality of C-shaped flanges in surrounding relation about the tube. The outer edges of the flanges have a conto... | 09/28/2004 |
| 6672425 | Noise abatement module The current invention is device for lowering the air velocity and inherent noise of high-speed air released from a closed system, comprising a straight pipe module with an outer tube and a concentric inner tube creating an annular space therebetween. The ... | 01/06/2004 |
| 6659222 | Multi-chambered muffler A muffler includes an outer shell which defines a chamber. A baffle is positioned in the chamber. A pair of plates cooperate with the baffle to partition the chamber into subchambers.... | 12/09/2003 |
| 6609590 | Exhaust system having angled baffle In-line exhaust systems comprise an exhaust pipe, and a sound-attenuating baffle in the exhaust pipe. The baffle has one or more baffle plates extending across the gas flow channel, at least one at an oblique angle. Each plate has an array of apertures th... | 08/26/2003 |
| 6415888 | Muffler Disclosed is a muffler in which a helicoil member is installed in each conduit, through which refrigerant gas flows from or into an expansion chamber during reciprocating movements of a piston in a cylinder. The helicoil member has diverse twisted angles ... | 07/09/2002 |
| 6360777 | High pressure hose particularly suitable for automotive fuel delivery system A high-pressure hose includes a rubber tube, a pair of steel tubes connected to each end of the rubber tube, and a pulsation damping member installed in the rubber tube, one end of the damping member being fixed in the steel tube connected to a downstream... | 03/26/2002 |
| 6241044 | Exhaust silencer and communicating pipe thereof More than two damping chambers 2A to 2C), a communicating pipe (6) for intercommunicating the damping chambers (2A, 2B) and another communicating pipe (7) for intercommunicating the damping chambers (2B, 2C) are provided. Both ends of the communicating pi... | 06/05/2001 |
| 6089347 | Muffler with partition array A muffler (10) having a casing (21), an inlet opening (22) and an outlet opening (26). An initial partition (30) forms an expansion chamber (28). The casing (21) has mounted and formed therein a partition array (34) that includes a divider partition (36),... | 07/18/2000 |
| 6024189 | Noise attenuating apparatus A sound attenuating device is provided for use in reducing sound levels associated with a sound source, such as an internal combustion engine. The noise attenuating device, for example, is connected to the exhaust pipe of the engine and receives sound wav... | 02/15/2000 |
| 5746986 | Industrial catalytic converter and combination industrial catalytic converter and silencer A catalytic converter for stand-alone application or for use with a novel silencer. The silencer includes a catalytic converter formed from a central housing of a size to house at least one catalytic converter element, an inlet portion connected to the in... | 05/05/1998 |
| 5703338 | Sound absorber A sound absorber for jet engines and the like including a housing defining an inflow opening and an outflow opening. Sound absorbing elements positioned within the housing define substantially parallel entrance and exit planes. The sound absorbing element... | 12/30/1997 |
| 5659158 | Sound attenuating device and insert A sound attenuating muffler useful with an internal combustion engine, preferably for marine applications, contains an insert comprising an arrangement of annular sound reflecting surfaces defining an inner chamber into which engine exhaust gases flow in ... | 08/19/1997 |
| 5496975 | Plug muffler for aircraft and method of construction thereof An improved aircraft muffler and the method of making it is disclosed. It is a plug muffler design having an outer housing and an internal exhaust conduit. The exhaust conduit has a center partition that blocks the flow of exhaust gas through the conduit.... | 03/05/1996 |
| 5444197 | Muffler with intermediate sound-attenuating partition and method A muffler for an internal combustion engine or the like including a casing (21) having an inlet opening (28), an outlet opening (29), a first partition (43) secured in the casing (21) to divide incoming exhaust gases, and a second partition (46) secured i... | 08/22/1995 |
| 5413189 | Sound attenuating device and insert A sound attenuating muffler useful with an internal combustion engine, preferably for marine applications, contains an insert comprising an arrangement of annular sound reflecting surfaces defining an inner chamber into which engine exhaust gases flow in ... | 05/09/1995 |
| 4890691 | Muffler A muffler for impeding and reflecting exhaust to reduce the formation of sound waves through a plurality of cone and barrier assemblies alternately and longitudinally spaced in a cylindrical body, with the apex of a conical member of each cone assembly an... | 01/02/1990 |
| 4809812 | Converging, corridor-based, sound-attenuating muffler and method A compact, sound-attenuating muffler for an internal combustion engine is disclosed in which the muffler includes a stream dividing partition positioned proximate the inlet of the muffler to divide the incoming exhaust gases into two streams of substantia... | 03/07/1989 |
| 4623035 | Muffler of the sound reflecting type for use with internal combustion engines A muffler is disclosed comprising a closed housing having an annular inlet and an annular outlet neck, and the housing having arranged therein a pair of axially extending pipes which are at least partially overlapping one another. One of the pipes is conn... | 11/18/1986 |
| 4600076 | Device for attenuating pulsation of fluids in piping systems A device for attenuating pulsation of a fluid in a piping system comprises fluid-branching pipes extending from the piping system in which there are pulsation waves, and a plurality of orifice elements and a plurality of discs disposed in a dispersed fash... | 07/15/1986 |
| 4595073 | Plug-type muffler section A plug section for a muffler, including an outer body and having an inlet pipe for introducing exhaust gas into the body. The inner end of the inlet pipe located within the body portion is closed off. Surrounding the inlet pipe is a conical baffle having ... | 06/17/1986 |
| 4588043 | Sound suppressor for a firearm A sound suppressor for a firearm, including a hollow cylindrical casing having an entrance end and an exit end; and at least one disc-shaped baffle element coaxially mounted within the casing and between the ends. The element has front and rear faces with... | 05/13/1986 |
| 4584924 | Silencer for firearms A silencer for the barrel of a firearm comprises a sheath defining an interior space having open opposite ends. The sheath has a longitudinal axis. A plurality of partitioned plates are connected to the sheath and extend across the interior space thereof.... | 04/29/1986 |
| 4574914 | Compact, sound-attenuating muffler for high-performance, internal combustion engine A compact, sound-attenuating muffler for a high-performance internal combustion engine is disclosed in which the muffler casing has an elongated transverse cross-section with a height dimension of only slightly larger than the height dimension of the inle... | 03/11/1986 |
| 4550799 | Muffler for exhaust gases A muffler for dissipating the sound component in exhaust gases from an internal combustion engine or the like is disclosed which has an enhanced useful life. The muffler includes a partition positioned across an incoming stream of exhaust gases. The parti... | 11/05/1985 |
| 4550848 | Baffle for canteens to prevent liquid splashing sounds An elongated baffle having a plurality of apertured damping members connected together to extend radially outwardly of its center which members are coilable so that the baffle can fit through the neck of a canteen with the members then expanding in the ca... | 11/05/1985 |
| 4541240 | Exhaust system for internal combustion engines The present invention provides an exhaust system comprising an elongated hollow casing having an upstream muffler chamber containing an insulated removable cartridge for sound absorbing and sound collecting, an intermediate chamber containing a removable ... | 09/17/1985 |
| 4530417 | Suppressor A suppressor for reducing the muzzle blast of firearms or the like. Several separate absorbent elements are aligned in tandem within a tubular housing, and adjacent absorbent elements are separated by triangular baffles which expose end portions of adjace... | 07/23/1985 |
| 4494625 | Axial acoustic wave attenuator for ramjets Apparatus for attenuating upstream gas motion induced by axial acoustic ws in a ramjet engine includes a series of hollow truncated conical attenuators acting to both modify and enhance fuel-oxidizer mixing and offering negligible resistance to downstrea... | 01/22/1985 |
