Matches 1 - 50 out of 99 1 2 >
Match Document Document Title
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...
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...
7527484 Muffler of scroll compressor  
Disclosed herein is a muffler of a scroll compressor. The muffler includes a first muffler having a pair of chambers defined above an outlet of a fixed scroll to communicate with the outlet and a...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
6745562 Diverter for catalytic converter  
A diverter ( 60 ) is provided, which is of low cost and which is effective in more evenly distributing exhaust gasses passing from a small diameter upstream exhaust gas pipe section ( 42 ) into a...
6688424 Noise absorbing device and device for taking air into engine room of a construction machine  
An engine noise reduction device to reduce sound output from an engine compartment and supply cooling air to the engine compartment to increase cooling efficiency and prevent engine and component...
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...
6419576 Sound attenuating inlet silencer for air supplying fan  
An air duct silencer can be used at the inlet of an air supply fan unit for a building or other large structure. The silencer has an exterior housing with exterior walls forming outer surfaces of...
6405825 Noise absorption blade mounting structure for working vehicles  
To provide a noise absorption blade mounting structure for a working vehicle, which is enabled to be excellent in the draft straightening property in an air hole of the cover of an engine room and...
6402612 Column fan unit  
An air handling system for use in a building is used in combination with an elevated floor assembly for mounting on a principal floor of the building, this assembly including a working area floor...
6386966 Blower unit with noise-reducing structure for vehicle air conditioner  
In a blower unit for a vehicle air conditioner, an inside/outside air switching door opens an inside air introduction port and closes an outside air introduction port when an inside air...
6324720 Portable blower tube noise reduction  
The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise...
6200215 Fan module for clean room applications  
A fan module for clean room applications, comprising outer, vertical restriction walls (5) with a lower edge part (6) having a planar lower surface (7) as well as an element (9) protruding from the...
6158082 Portable blower with blower tube noise reduction  
The present invention provides for noise reduction during operation of a portable blower by reducing the noise or acoustic energy escaping from the housing outlet and blower tube. The noise...
6145616 Acoustic chamber  
An acoustic chamber for a compressor, wherein the compressor has a cooling fan and a fan opening. The acoustic chamber has a floor, a ceiling and first and second side walls, defining first and...
6139427 Ventilation system  
A ventilation system which provides a ventilating unit which can be installed without structural constraints, and air flow can be controlled effectively by setting the direction of nozzles in...
6112850 Acoustic silencer nozzle  
An acoustic silencer nozzle for ventilation and exhaust fans. The nozzle provides at least two converging exhaust paths, each of which extend through an area that is adjacent acoustically absorbing...
6102153 Compact air handling unit with integral silencing  
A compact air handling system includes an inlet channel which defines an inlet flow path in a first direction along a flow axis and a discharge channel which defines a discharge flow path in a...
6095281 Low noise air conditioner housing  
A window-type air conditioner housing includes a backboard and two parietal sideboards of polystyrene. Each sideboard has a steel plate implant and a coaxial bracing hole for supporting a motor and...
6086476 Method and apparatus for cooling and acoustic noise reduction in a computer  
A system for cooling a heat-producing component in a computer system includes a conduit or plenum and a fan assembly. The fan assembly may be supported by the conduit. An air stream directing and...
6059070 Soundproofed conduit to discharge fumes  
Soundproofed conduit to discharge fumes, advantageously associated with assemblies to discharge fumes for melting systems in steel production plants, the conduit being located between the...
6027406 Centrifugal fan unit with vertical rotation axis  
A centrifugal fan system for a building, including a centrifugal fan mounted for rotation about a vertical axis and having a bottom inlet. The fan is mounted in a movable housing having a fan...
5894114 Sound absorber for blower  
A sound absorber for a blower has a housing having an air inlet opening, an axially arranged air outlet passage, and a substantially spiral-shaped passage which connects the air inlet opening with...
5872342 Free rotor muffler  
A free rotor is mounted to spin freely in a conduit network that is acoustically coupled to a noise source through a working fluid that flows through the conduit network. The free rotor muffles the...
5841080 Blower pipe with silencer  
A working machine such as a power blower has a blower pipe with a silencer. The blower pipe has an outer pipe and a perforated inner pipe, with a sound absorbing material disposed between the inner...
5836813 Air conditioner for vehicle  
An inside air/outside air switching case employing a rotary door, since an introduced air flows along an inner surface of a circumferential wall of the rotary door, an air flow guiding portion...
5792999 Noise attenuating in ported enclosure  
Noise attenuation apparatus comprising an enclosure having a wall separating an interior and an exterior. The enclosure defines a volume. The volume is characterized by an acoustic compliance and...
5620370 Blowing apparatus, suction panel therefor and straightening guide therefor  
A blowing apparatus includes a suction passage having a suction chamber enclosed by rigid body surfaces, suction ports opening toward the suction chamber for sucking air from outside, and a fan...
5610360 Large caliber gun muffler  
A muffler for a large caliber gun having a gun tube includes a transition section fitted around the gun tube and engaging the gun tube for preventing the escape of residual combustion gases caused...
5518451 Clean room system  
A clean room system has at least one clean room through which clean air is guided. The clean room has a bottom through which the clean air exits. At least one blower for sucking the clean air from...
5508477 Apparatus for acoustic noise reduction of office automation devices utilizing Helmholtz resonance theory  
An acoustic noise reduction apparatus for an office automation device is provided on a surface of an outer shield of the office automation device and has a hole therethrough. The body member of the...
5460570 Ventilator for elevator cage  
An elevator cage with an ventilator which has supply system for supplying fresh air into the cage and exhaust system for exhausting air from the cage. An active noise controller is provided to at...
5332872 Noise reduction unit for gas compressors  
A sound reduction unit for a compressor, in which the compressor has a cooling fan and an air intake, and the sound reduction unit includes a housing forming an enclosure about the air inlet and a...
5313803 Air conditioning system for human-occupied spaces  
A central air conditioning unit with a blower and feed duct is provided with a filter unit between the blower and the air outlet into the space applied with the conditioned air. The filter unit has...
5299634 Indoor unit of a ventilation system, ventilation and air conditioner  
In an air conditioner indoor unit having a ventilator and a heat exchanger, there are provided an upper casing of the ventilator made from a porous structure having air permeability, a lower casing...
Matches 1 - 50 out of 99 1 2 >