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| Number | Title | Issue Date |
| 8146707 | Air conditioner An air conditioner includes a cabinet configured to define an outer appearance of the air conditioner. The air conditioner also includes a front panel coupled to the cabinet and having an intake hole. The air conditioner further includes a fan assembly positioned wi... | 04/03/2012 |
| 8127886 | Noise suppressor, electronic apparatus, and noise suppression characteristic control method A noise suppression characteristics adjustment method includes adjusting noise suppression characteristics of a noise suppressor, which includes a muffler having a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a p... | 03/06/2012 |
| 8074765 | Sound absorbing structure of electronic equipment In order to provide sound absorbing structure capable of reducing the noise of electronic equipment while maintaining the cooling capability of the electronic equipment, there is provided sound absorbing structure in which a plurality of penetrating openings are pro... | 12/13/2011 |
| 7992674 | Dipole flow driven resonators for fan noise mitigation A fan system includes a rotor supported for rotation about a fan axis. The rotor has a central hub and a plurality of blades each extending outwardly from the hub to a tip. The rotor blades define a rotor plane perpendicular to the fan axis. A first acoustic resonat... | 08/09/2011 |
| 7942234 | Noise suppressor, electronic apparatus, and noise suppression characteristic control method A noise suppressor for an apparatus having a cooling fan and cooling duct includes a muffler including a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting the intake plane of... | 05/17/2011 |
| 7921962 | Silencing arrangement In an appliance, such as a cyclonic vacuum cleaner, a motor is arranged to drive an impeller fan located in a motor and fan unit. The rotation of the impeller may cause nuisance tones to be generated. A silencing arrangement is provided to control such noise and inc... | 04/12/2011 |
| 7891464 | System and method for noise suppression Embodiments of the present invention relate to a system and method for noise suppression. Specifically, embodiments of the present invention include a resonator configured to suppress noise from an electric fan. The resonator may comprise an enclosure having an oute... | 02/22/2011 |
| 7806229 | Fan powered silencing terminal unit An apparatus and method for attenuating the sound generated by a fan powered terminal unit in an HVAC (heating, ventilating, and air conditioning) system. The apparatus utilizes internal geometry to minimize noise due to air disturbances and aerodynamic effects with... | 10/05/2010 |
| 7789194 | Acoustic attenuation chamber A silencer for a CPAP device comprises a housing assembly defining a flow path passing therethrough and including at least one of an inlet chamber, an acoustic chamber and a blower chamber. Each of the chambers has an inlet and an outlet for fluid communication ther... | 09/07/2010 |
| 7779960 | System and method for noise suppression Embodiments of the present invention relate to a computer system. In one embodiment, the computer system comprises a fan and a muffler configured to suppress noise from the fan. The muffler may comprise a plurality of acoustic absorption sheets, wherein the acoustic... | 08/24/2010 |
| 7762373 | Fan noise control apparatus A fan noise control apparatus is provided to facilitate the reduction of noise. According to the preferred embodiments, an acoustically transparent portion is provided to permit noise from one source to pass through to interact and cancel with another noise. ... | 07/27/2010 |
| 7712576 | Sound absorbing structure of electronic equipment In order to provide sound absorbing structure capable of reducing the noise of electronic equipment while maintaining the cooling capability of the electronic equipment, there is provided sound absorbing structure in which a plurality of penetrating openings are pro... | 05/11/2010 |
| 7644803 | Silencing device A silencing device disposed to the outside of a fan 2 that discharges air from the interior of a device 1 to the outside. The silencing device includes a reflection plate 6 provided substantially normal to the rotation axis 2a of t... | 01/12/2010 |
| 7581619 | Movable baffle columns for use with air handling units A sound-baffling arrangement for use in conjunction with an air-handling unit. One or more sound baffle columns are mounted for rolling or sliding movement within the interior of the air handling unit housing. Each baffle column may be selectively moved between a us... | 09/01/2009 |
| 7546898 | Noise reduction with resonatance chamber An apparatus comprises a housing comprising an air inlet, an air outlet and a divider that divides the housing into first and second air passages. The housing comprises a resonance chamber for each air passage. Each resonance chamber comprises a port, and air waves ... | 06/16/2009 |
| 7434657 | Acoustic foam sound reducer for vacuum power unit A power unit for an in-wall vacuum cleaning system has a first compartment which contains a motor for producing a vacuum at remote wand receptacles and a second compartment for separating and collecting the debris. An improved sound reducer is mounted in the motor c... | 10/14/2008 |
| 7383919 | Rotatable propeller driven engine exhaust system An exhaust chamber system having a rotatable propeller type blade assembly at the entry to an expansion chamber which creates a vortex that swirls exhaust gas towards the outlet. The resultant action within the exhaust chamber aids in scavenging internal combustion ... | 06/10/2008 |
| 7379299 | Noiseproofed and ventilated enclosure for electronics equipment A system and method are disclosed for enclosing electronic equipment in a noiseproofed and ventilated enclosure. This includes supplying air to an enclosure and removing air from the enclosure through acoustic chambers attached to the enclosure. The acoustic chamber... | 05/27/2008 |
| 7379298 | Noise proofed ventilated air intake chamber for electronics equipment enclosure A system and method are disclosed for enclosing electronic equipment in a noiseproofed and ventilated enclosure. This includes supplying air to an enclosure and removing air from the enclosure through acoustic chambers attached to the enclosure. The acoustic chamber... | 05/27/2008 |
| 7347222 | 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 made of flexible material and is provided with at least one aper... | 03/25/2008 |
| 7337876 | Suction apparatus with noise reduction means A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth ex... | 03/04/2008 |
| 7337875 | High admittance acoustic liner A cooled acoustic liner useful in a fluid handling duct includes a resonator chamber 52 with a neck 56, a face sheet 86, and a coolant plenum 80 residing between the face sheet and the chamber. Coolant bypasses the resonator chamber, rath... | 03/04/2008 |
| 7331422 | Vortex muffler A muffler includes an inner passage residing in an outer shell, and a stationary fan residing in the inner passage. The fan creates a vortex in a flow through the inner passage thus improving the flow and reducing the exhaust sound level. The inner passage includes ... | 02/19/2008 |
| 7328586 | Repositionable attenuator A repositionable attenuator for a terminal unit in a heating, ventilation, and air conditioning system is disclosed. The attenuator is positionable between at least a first and a second position. This enables the attenuator to be attached to and shipped with the ter... | 02/12/2008 |
| 7314113 | Acoustic absorbers for use with computer cabinet fans and other cooling systems Systems and methods for absorbing acoustic noise generated by computer cabinet cooling fans are described herein. In one embodiment, an acoustic absorber for use with a fan carried by a computer cabinet in a room includes a first acoustic panel spaced apart from a s... | 01/01/2008 |
| 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 |
| 7131514 | Noise attenuation device for a vehicle exhaust system A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the pass... | 11/07/2006 |
| 7112038 | Blower muffler and vibration isolation An air impeller with both sound attenuation and vibration isolation means in a compact assembly. Three muffler chambers are provided preceding the inlet to the impeller each with sound absorbing foam material and vibration isolators are provided at both inlet and di... | 09/26/2006 |
| 7089731 | Rotating motorcycle exhaust pipe A an improvement in a two wheel motor vehicle having an internal combustion motor and a wheel drive mechanism, wherein the motor has an exhaust system connected thereto, includes a) an exhaust system having a first exhaust pipe and a second exhaust pipe with the fir... | 08/15/2006 |
| 7086224 | Rotating motor vehicle tail pipe A motor vehicle having at least three wheels, an internal combustion motor and a wheel drive mechanism, wherein the motor has an exhaust system connected thereto, includes a) an exhaust system having a first exhaust pipe and a second exhaust pipe with the first exha... | 08/08/2006 |
| 7086498 | Noise attenuation device for a vehicle exhaust system A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the pass... | 08/08/2006 |
| 7028416 | Noise attenuating drying apparatus for motor vehicles An air duct for a motor vehicle air dryer has an outer shell defining an inner surface. A porous, fluid permeable lining for attenuating noise caused by turbulent air flow through the air duct is positioned on the shell inner surface, and defines an inner surface. T... | 04/18/2006 |
| 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 |
| 6974376 | Air conditioner for vehicle with noise-reduction means A flow straightening grid 30 is provided at an area where the air flow turns about 180 degrees in an air path 23, or in the vicinity thereof. Because of this, the air flow can be prevented from being disturbed in the air path 23 and, therefore, ... | 12/13/2005 |
| 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 |
| 6948585 | Acoustic wave attenuator for a rail An actuator rail assembly for conveying an actuating fluid under pressure to at least one fuel injector includes an elongate fluid passageway (18) being defined in a rail (12). A fluid inlet port (31) is in fluid communication with the fluid pas... | 09/27/2005 |
| 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 |
| 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 |
| 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 |
| 6880813 | Outlet silencer for cooling tower, evaporator cooler or condenser A sound attenuating apparatus for mounting on a heat exchanging apparatus such as a cooling tower, this apparatus having an attenuator housing with vertically extending sides, a top cover and a bottom adapted for mounting on the tower. There is an annular air inlet ... | 04/19/2005 |
