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| Number | Title | Issue Date |
| 8162101 | Ram intake unit having a sound absorbing structure A ram intake unit mounted on a front portion of a frame structure of a motorcycle includes an acoustic material disposed along an inner wall of a ram air intake duct for absorbing induction noises, which duct forms an induction system through which an incoming wind ... | 04/24/2012 |
| 8033359 | Intake sound adjusting device An intake sound adjusting device includes an intake passage, a tubular branch passage branched from the intake passage, and an oscillating member disposed within the branch passage, in which the oscillating member has an oscillating portion disposed so as to close a... | 10/11/2011 |
| 8011470 | Compressor silencer for hyperbaric oxygen therapy system A hyperbaric oxygen therapy system includes a pressure vessel containing a gas, an oxygen concentration measurement apparatus for monitoring the concentration of oxygen in the gas, an environmental control apparatus for controlling the temperature of the gas in the ... | 09/06/2011 |
| 7992676 | Compact tuned acoustic attenuation device A tuned acoustic attenuation device includes a housing defining a chamber within with air inlet and outlet channels opening into the chamber. An acoustic chamber or chambers are arranged on an exterior wall of or alternately within the housing and positioned to exte... | 08/09/2011 |
| 7967106 | Air induction sound modification system for internal combustion engine An air induction sound modification system for an internal combustion engine includes a multi-frequency sound suppression unit having Helmholtz resonators and a multi-component expansion chamber. A sound generator, which functions to radiate sound at a desirable, tu... | 06/28/2011 |
| 7938225 | Clean air duct noise silencing An air intake system for reducing air induction noise, which includes an air duct housing that has a lower shell and an upper shell, each having a first end and a second end and a plurality of tuning holes formed therein. The air intake system further includes an ai... | 05/10/2011 |
| 7921963 | Internal combustion engine equipped with intake silencer An intake system for an internal combustion engine has an intake silencer 30 provided with an expansion chamber 33, and a connecting pipe 40 having an inlet 46 through which air from the expansion chamber flows, and an outlet 47 th... | 04/12/2011 |
| 7832524 | Sound absorber for gas turbine installations A device (1) for the feed of air to a compressor (2) of a gas turbine plant has an air inlet duct (8) and an air inlet chamber (9) which adjoins the air inlet duct. For the purpose of damping sound emissions of the compressor (2), ... | 11/16/2010 |
| 7793757 | Resonator with internal supplemental noise attenuation device A resonator for an induction system includes an inlet and outlet with a resonator cavity arranged therebetween. A tube is arranged within the resonator cavity and at least partially extends between the inlet and outlet. In one example, at least one supplemental nois... | 09/14/2010 |
| 7712577 | Air induction housing having a perforated sound attenuation wall An air induction housing having a perforated wall which simultaneously provides ample air entry into the air induction housing and excellent intake noise attenuation. The size, number and arrangement of the perforations is selected such that ample airflow is provide... | 05/11/2010 |
| 7708113 | Variable frequency sound attenuator for rotating devices A rotatable sound attenuation device is provided comprising a central portion rotatable about a first axis, a radial portion extending outwardly from the central portion and a chamber having a closed first end and a second end opening radially outwardly of the radia... | 05/04/2010 |
| 7621372 | Duct and process for producing the same An object of the present invention is to provide a duct having a simple structure and capable of suppressing occurrences of an intake noise and a dropping-out of an adsorbent, and to a process for producing the same capable of producing easily. The present duct (... | 11/24/2009 |
| 7543683 | Vehicle resonator structure and attachment method A vehicle resonator structure and attachment method is provided and includes a resonator chamber that has a first intake tube and a first exhaust or outlet tube attached thereto. At least one of the tubes includes a projection that can be molded (e.g., via flash mol... | 06/09/2009 |
| 7441527 | Air suction device An air suction device is provided with an air suction system having at least one capacity-enlarged portion, a compression pump compressing air in synchronization with operation of an engine, a compression air control unit, and a vibration plate which is vibration-ex... | 10/28/2008 |
| 7435060 | Compressor The present invention relates to a compressor. In one aspect of the present invention, a compressor is provided, including a cylinder having a compression chamber, a valve assembly mounted on one open end of the cylinder, and a head assembly on the valve assembly. T... | 10/14/2008 |
| 7431127 | Compact noise silencer for an air blower A compact noise silencer for a blower, including an L-shaped back wall having a sound adsorbent media and side walls defining a triangular enclosure, an inlet opposite one portion of the back wall and a central outlet opposite the back wall having a filter directing... | 10/07/2008 |
| 7383810 | Air induction system having an integrated resonator An air induction system for carrying air to the intake of an internal combustion engine includes an air cleaner housing including a surface at least partially enclosing a first chamber or cover located in the air cleaner housing, an inlet through which air enters th... | 06/10/2008 |
| 7381032 | Hermetic compressor and freezing air-conditioning system In a hermetic compressor in a freezing refrigerating system or an air-conditioning system such as a refrigerator or a showcase, a construction is disclosed for intending to provide a low-noise hermetic compressor by effectively attenuating a pressure pulsation havin... | 06/03/2008 |
| 7357221 | Exhaust gas muffler An exhaust gas muffler is provided for an internal combustion engine, especially for an internal combustion engine in a manually-guided implement such as a power saw, a cut-off machine, or the like. The muffler has a housing having an inlet for exhaust gases and an ... | 04/15/2008 |
| 7350496 | Intake muffler A resonator is connected with an intake air pipe and forms a resonant chamber therein. The resonator includes a diaphragm, which is generally planar and is disposed between an air passage of the intake air pipe and the resonant chamber. The diaphragm forms multiple ... | 04/01/2008 |
| 7341448 | Gas-fired heating apparatus The gas-fired heating apparatus, especially a water heater, has a combustion chamber (2a); an atmospheric gas burner (5) within the combustion chamber (2a); a combustion gas/air supply system (18) having an intake device ( | 03/11/2008 |
| 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 |
| 7331182 | Combustion chamber for a gas turbine At least one Helmholtz damper is arranged at a combustion chamber for a gas turbine in order to damp thermoacoustic oscillations; the damping volume of this Helmholtz damper is in communication with the combustion chamber via a connecting passage. Optimum damping is... | 02/19/2008 |
| 7316291 | Suction muffler for a hermetic refrigerant compressor The invention concerns a suction muffler for a hermetic refrigerant compressor with a housing having an inlet and an outlet and limiting at least one muffling chamber, and a gas supply channel located in the muffling chamber between the inlet and the outlet. It is e... | 01/08/2008 |
| 7306438 | Suction gas guiding system for reciprocating compressor A suction gas guide system (100) for reciprocating compressor (30) comprises a gas guide conduit having both ends installed on a suction pipe (SP) of a shell (10) and on an inner flowing passage of a piston (31) so as to face each other a... | 12/11/2007 |
| 7303037 | Snowmobile four-cycle engine arrangement A snowmobile four-cycle engine arrangement, includes: a four-cycle engine arranged in an engine compartment formed in the front body of a snowmobile with its crankshaft laid substantially parallel to the body width and having a cylinder case inclined forwards with r... | 12/04/2007 |
| 7287503 | Engine air intake apparatus An air cleaner chamber is configured such that a filtering member is held between an air cleaner cover and an air cleaner case. A low-speed operation air intake passage and a high-speed operation air intake passage share an outlet passage portion near a dusty space,... | 10/30/2007 |
| 7273129 | Muffler with internal heat shield An exhaust muffler includes upper and lower external shells that are formed from metal material. A heat shield is disposed in the muffler adjacent the upper external shell. The heat shield is formed from a high-density fiber insulation pad configured to nest with th... | 09/25/2007 |
| 7249652 | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle A fluid guideline with at least two structural elements made of substantially soundproof material has at least one opening for sound damping. An impedance change (in particular in the form of an impedance discontinuity) of the flow resistance of the fluid flowing th... | 07/31/2007 |
| 7244108 | Hermetic compressor with an improved cylinder head-suction muffler assembly This invention relates to a hermetic compressor used on a refrigerant cycle such as a refrigerator, and discloses a low noise compressor designed to attenuate a resonance sound in a compression chamber and intake pressure pulsing more operatively at a position adjac... | 07/17/2007 |
| 7234555 | Secondary path automobile air intake system An automobile air intake system is provided that channels air from inside the automobile engine compartment to an air intake enclosure leading to the engine. Air inside the engine compartment is channeled via a passageway in the hood to an air intake enclosure leadi... | 06/26/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 7225780 | Modular resonator A modular air induction system for a vehicle is provided. The air induction system includes a housing, a partition, and a plurality of holding members. The housing defines a chamber and includes an opening in fluid communication with the chamber. A partition is loca... | 06/05/2007 |
| 7207310 | Noise attenuation device for an air induction system An air induction system for a motor vehicle, having a pair of conduits fluidly connecting an engine to the ambient air and a housing located between the pair of conduits. The housing includes side walls and a top wall defining a chamber. A baffle plate for attenuati... | 04/24/2007 |
| 7179326 | Oxygen concentration apparatus An oxygen concentrating apparatus 10 for generating oxygen enriched gas by adsorbing and separating nitrogen gas from air, comprises; an oxygen concentrator 40 having an adsorption cylinder filled with adsorbent for adsorbing nitrogen gas, also having ... | 02/20/2007 |
| 7174991 | Muffler for internal combustion engine The subject invention refers to a muffler comprising a muffler housing (1, 2) and generally a catalytic converter element (13) mounted in the housing, which muffler has at least one inner outlet (4) through which exhaust gases cleaned by the cat... | 02/13/2007 |
| 7165647 | Mechanical acoustic filter by erosion etching A mechanical acoustic filter is formed of boards made by using erosion etching. The filter may be used in electric condenser microphones. The filter may be made of one or a plurality of boards each being made by erosion etching according to different requirements. T... | 01/23/2007 |
| 7159818 | Multi-spectral air inlet shield and associated inlet structure A multi-spectral shield and associated inlet structure is provided for reducing the signature of an air inlet port defined within an exterior wall of an aircraft, ship, or land-based vehicle across radar and infrared wavelengths. The multi-spectral inlet shield incl... | 01/09/2007 |
| 7152564 | Air intake system and forklift equipped with it In an air intake system, a rear tower having an interior space is provided on the top surface of a body frame. A rear pillar having an interior passageway is mounted on the rear tower. An air intake port communicating with the passageway is provided in the rear pill... | 12/26/2006 |
| 7152706 | Induction system for a four cycle engine A four cycle engine having at least one cylinder unit is disclosed. The engine includes a continuously variable transmission (CVT) connected to the engine on one side of the engine. An air box is also provided that is located on the same side of the engine as the CV... | 12/26/2006 |
