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| Number | Title | Issue Date |
| 7431125 | Composite muffler for use with airborne auxiliary power unit The present invention provides a composite muffler for use with an auxiliary power unit. The composite muffler comprises a composite outer can, an annular baffle, an acoustic liner, and a thermal barrier. The composite outer can is disposed substantially symmetrical... | 10/07/2008 |
| 7407037 | Exhaust silencer for internal combustion engine A high-performance exhaust silencer in which a shell wall includes a shell outer plate, a shell inner plate, and a damping material to be inserted therebetween. A space between the shell outer plate and shell inner plate of the exhaust silencer is narrowed and the s... | 08/05/2008 |
| 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 |
| 7334662 | Equipment enclosure acoustical door with low impedance distributed air flow An acoustic door for an equipment enclosure, such as a rack mount cabinet, also provides a low impedance air flow uniformly delivered across the cabinet opening. A pair of metal panels, with acoustic foam along the rear surfaces, extend angularly outward and toward ... | 02/26/2008 |
| RE39972 | Detachable integral aircraft tailcone and power assembly The present invention provides a tailcone and power assembly mountable to the body of an aircraft using a height adjustable dolly. The tailcone assembly comprises a longitudinal support member, a gas turbine engine mounted to the support member; a firewall; two curv... | 01/01/2008 |
| 7278514 | Acoustic noise filter An acoustic filter is provided with a single flow chamber for exposure of a flexible rubber layer to liquid undergoing flow through the flow chamber with noise producing acoustic energy therein. The flexible rubber layer is supported on a cylindrical drum with slant... | 10/09/2007 |
| 7267297 | Integrated axially varying engine muffler, and associated methods and systems Integrated axially varying engine mufflers, and associated methods and systems. An arrangement in accordance with one embodiment of the invention includes a tailcone having a tapering external surface, a cavity disposed within the surface, and an engine muffler disp... | 09/11/2007 |
| 7261181 | Detatchable muffler apparatus for pneumatic tools The exhaust created from the operation of pneumatic tools can create a considerable amount of noise. The present disclosure includes a detachable muffler apparatus used to reduce the sound during the operation of a pneumatic tool. The muffler apparatus includes a fl... | 08/28/2007 |
| 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 |
| 7127884 | Muffler with an integrated catalytic converter A muffler has an integrated SCR catalytic converter for an exhaust line of an internal combustion engine, in particular in a motor vehicle The muffler includes a housing which has an intake trumpet on the intake end and an exhaust pipe on the output end. Catalytic c... | 10/31/2006 |
| 7104749 | Intake silencer for gas turbines A silencer (25a) for the attenuation of noise occurring in an intake airstream (10, 27) of a gas turbine (1–3) includes a device or devices (31, 32, 33, 34) for the introduction of water and/or steam into the intake airstream ( | 09/12/2006 |
| 7104750 | Fogging device for gas turbines A fogging device (26) for introducing water and/or vapor into an intake air flow (10, 27) of a gas turbine (1–3) includes a sound-absorbing device (31, 35). This device may in particular be designed in the form of Venturi tubes (31 | 09/12/2006 |
| 7100737 | Muffler for noise reduction A muffler assembly, comprising an outer muffler assembly comprising a plurality of fiberglass discs and a plurality of reactive plates, and an inner muffler assembly comprising a plurality of fiberglass discs and a plurality of reactive plates the inner muffler asse... | 09/05/2006 |
| 7051523 | Exhaust system assemblies employing wire bushings for thermal compensation Exhaust system assemblies employ wire bushings for thermal compensation to minimize noise due to “stick-slip” while the system cools. In a preferred embodiment, the wire bushings are formed of at least one strand of wire coiled about male end portions of pipe se... | 05/30/2006 |
| 7017706 | Turbine noise absorber Exemplary methods, devices and/or system for reducing noise produced by a turbine, such as, a turbocharger turbine. An exemplary exhaust conduit employs material to absorb exhaust-borne noise and/or structure-borne noise. Another exemplary exhaust conduit employs fe... | 03/28/2006 |
| 6945355 | Muffler arrangement for a flow duct A muffler arrangement includes muffler elements arranged in rows which are oriented in each case transversely to a direction of flow. The muffler elements themselves are oriented in each case longitudinally in relation to the direction of flow. The distance between ... | 09/20/2005 |
| 6935460 | Noise muffler for oxygen concentrator A noise muffler for the exhaust of waste gases from apparatus such as an oxygen concentrator, including a muffler core with an inlet to receive the waste gases and a plurality of bores in the core first to direct the waste gases through a filter material and a cap e... | 08/30/2005 |
| 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 |
| 6920959 | Inlet and outlet duct units for air supply fan Duct units for delivery of air to an air supply fan and for connecting this fan to an air heater unit are disclosed. The duct unit for delivering air in one version has a narrow first section, a second, transition-type section and a wide sound attenuating, third sec... | 07/26/2005 |
| 6899198 | Compressed air muffler A compressed air muffler comprises a rear attachment section, a compressed air muffler section adjoining it in the longitudinal direction with a compressed air muffler body of a porous compressed air muffler material and an outlet duct extending in the length direct... | 05/31/2005 |
| 6892851 | Acoustic attenuator An acoustic attenuator includes an intake air duct having an intake air duct opening leading to an outside environment and a blower fan opening leading to a blower fan. Air is drawn through the intake air duct opening towards the blower fan and a primary reflecting ... | 05/17/2005 |
| 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 |
| 6857502 | Engine muffler and method of manufacturing the same This engine muffler has a sound absorbing material interposed between an internal tube and an external tube which is formed with a projection projecting toward the sound absorbing material along almost its entire periphery. When interposing the sound absorbing mater... | 02/22/2005 |
| 6799657 | Absorptive/reactive muffler for variable speed compressors An absorptive and reactive muffler includes an annular flow path for the gas with the center of the annulus having a plurality of resonators which are in open communication with the downstream end of the annular flow path and make up the reactive portion of the muff... | 10/05/2004 |
| 6766639 | Acoustic-structural LPC splitter An acoustic-structural LPC splitter assembly which comprises a structural acoustic splitter through which are arranged a plurality of bleed exhaust ports, the acoustic splitter having a first and second end, an inner and outer surface, a front joint for securing the... | 07/27/2004 |
| 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 |
| 6672424 | Acoustically treated turbomachine multi-duct exhaust device A multi-duct diffusion exhaust device for a turbomachine. The exhaust device including an annular inlet, an outer casing shaped symmetrically overall with respect to an axis, one or more internal partitions defining several roughly concentric ducts for an... | 01/06/2004 |
| 6615576 | Tortuous path quiet exhaust eductor system A tortuous path quiet exhaust eductor system may be mounted to a gas turbine engine, such as commercial aircraft APU. The system includes an oil cooler, eductor primary nozzle, oil cooler air nozzle, and surge air dump nozzle. The primary nozzle, oil cool... | 09/09/2003 |
| 6581723 | Muffler shell filling process, muffler filled with fibrous material and vacuum filling device A process is provided for filling a muffler shell with fibrous material. The process involves providing a muffler shell comprising first and second muffler shell outer parts which define an internal cavity when coupled together and an internal structure a... | 06/24/2003 |
| 6539702 | Gas turbine exhaust passage and damper system for same having a non-enclosed porous peripheral wall A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At l... | 04/01/2003 |
| 6457550 | Weatherproof sound attenuating device A sound attenuating device including a sound insulating structure and a windband. The sound insulating structure is constructed and arranged to receive vented air from an exhaust vent. The windband is affixed to the sound insulating structure and is const... | 10/01/2002 |
| 6393835 | Exhaust muffler comprising a catalytic converter The invention relates to an exhaust-gas muffler on an internal combustion engine in a motor chain saw. The exhaust-gas muffler includes a housing (1) which is assembled of two housing shells (2, 3). The one housing shell (2) has an exhaust-gas inlet (4) a... | 05/28/2002 |
| 6386316 | Device for controlling the porosity of a helical, flexible, sound-absorbing air-conducting tube Device for controlling the porosity of a helical, flexible, sound-absorbing, air-conducting tube; the present patent relates to a device comprised of a variable-width, non-porous film strip (2) helically arranged in a discontinued manner between the exter... | 05/14/2002 |
| 6374944 | Silencer with internal rain diverter Disclosed herein is a silencer for reducing acoustic energy in a flow of exhaust gas from a combustion power source which prevents rain or snow from entering an exhaust stack without the need for a weather cap or hood. The silencer achieves acoustic energ... | 04/23/2002 |
| 6321870 | Air intake means with water separator An air intake muffler for a heater, especially a motor vehicle heater, with a hollow body (7) of sound-absorbing material which is surrounded by a muffler chamber (2) and is penetrated by a cavity (8) which is flush with an inlet connection (9) and an out... | 11/27/2001 |
| 6248423 | Acoustical and structural microporous sheet A microporous sheet having both acoustical and structural functionality and a process for producing the sheet. Construction of the sheet requires, first of all, providing a sheet capable of functioning as a structural element of a component. A laser devic... | 06/19/2001 |
| 6244539 | Detachable integral aircraft tailcone and power assembly The present invention provides a tailcone and power assembly mountable to the body of an aircraft using a height adjustable dolly. The tailcone assembly comprises a longitudinal support member, a gas turbine engine mounted to the support member; a firewal... | 06/12/2001 |
| 6241043 | Muffler insert and process for the production thereof In order to create a process for producing muffler inserts as well as novel muffler inserts, which are most optimally adaptable in size and shape to the interior space of the muffler housing to be filled, by simple means, and which also can be produced ec... | 06/05/2001 |
| 6155379 | Silencing member for mufflers and method of manufacturing the silencing member A silencing member has a plurality of elongate members each having a plurality of elongate glass fibers, with the plurality of elongate members being cross-layered to define a fabric.... | 12/05/2000 |
| 6109387 | Silencer for gas discharge devices Silencer for gas discharge device employing easily replaceable cartridge utilizing juxtapositioned layers of wire mesh and porous resilient material which dissipate the energy stored in an exhaust system and deflect under pressure of the exhaust gases to ... | 08/29/2000 |
