| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 181229000 | Carburetor, burner, or compressor intake silencer | 34 |
| 20080202848 | Sound absorber for gas turbine installations | 08-28-2008 |
| 20080230306 | MUFFLE CHAMBER DUCT - A pipe is incorporated in an intake system and having a first hole for a noise in the intake system to be released therethrough. A cover covers the pipe for attenuating the noise, having a second hole. | 09-25-2008 |
| 20080230307 | MUFFLE DUCT - A pipe is incorporated in an intake system and has a first hole for a noise in the intake system to be released therethrough. A cover covers the pipe for attenuating the noise and has a second hole coinciding with the first hole circumferentially of the pipe. | 09-25-2008 |
| 20080257640 | Compressor Muffler - A compressor has first ( | 10-23-2008 |
| 20080264719 | SILENCER - A silencer for attenuating a sound includes an inner duct in which gas flows, and an outer duct surrounding the inner duct with a gas layer formed between the outer duct and the inner duct. The sound is generated in one of an upstream side of the inner duct in a gas flow direction, a downstream side of the inner duct in the flow direction, and an inside of the inner duct. The inner duct includes a thin film over its entire surface. The film has a first reinforcement section formed in a direction parallel to the flow direction, and a plurality of vibrating surfaces. The film is bent at the first reinforcement section. Each combination of adjacent two of the plurality of vibrating surfaces is connected by the first reinforcement section. The first reinforcement section of the inner duct is fixed to the outer duct. | 10-30-2008 |
| 20090038880 | Air Intake Noise Reducing Device, Internal Combustion Engine Fitted with the Same and Structure for Fitting the Same to the Internal Combustion Engine - The present invention provides an air intake noise reducing device, an internal combustion engine fitted with the air intake noise reducing device and a structure for fitting the air intake noise reducing device to the internal combustion engine. The air intake noise reducing device comprises a gasket ( | 02-12-2009 |
| 20090065294 | Engine silencing and vibration reduction system and method - A noise and vibration reduction system for an engine affixed to a body and a method for reducing vibrations in the body produced by that engine during operation. The present invention is particularly related to noise and vibration reduction in auxiliary power units installed on long-haul trucks and similar types of transportation vehicles. The primary noise and vibration reduction components of the present invention include an air intake silencer, a vibration tuner, and an engine speed limiter. | 03-12-2009 |
| 20090078497 | Internal combustion engine equipped with intake silencer - An intake system for an internal combustion engine has an intake silencer | 03-26-2009 |
| 20090114476 | 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 molding after the tube itself is blow molded) onto the tube. The resonator chamber can include upper and lower tube mount structures that can be hot plate welded and sandwiched onto the projection in the tube. Thus, the tube(s) is/are positively retained in position with respect to the resonator chamber such that the tuning of the resonator does not change due to fluctuations in geometry of the tube(s) and resonator chamber structure, and such that there is little or no vibration noise and/or possible damage that might result if the tube(s) were free to move with respect to the resonator chamber. | 05-07-2009 |
| 20090242323 | Air duct as tuning mechanism and engine cover - A tuning device may include a tubular portion having a hollow cross section and a flat body portion covering an engine. The body portion may have a chamber disposed therein and a throat providing fluid communication between the chamber and the tubular portion. Air flowing through the tubular portion causes the chamber to produce interfering sound waves having a predetermined frequency. The interfering sound waves manipulate sound waves produced by the engine. | 10-01-2009 |
| 20100071991 | 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 can be introduced towards a motorcycle combustion engine, and a holder disposed inwardly of the acoustic material for securing the acoustic material to the ram air intake duct. | 03-25-2010 |
| 20100193282 | BROADBAND NOISE RESONATOR - An apparatus comprising includes a conduit portion having a conduit inner surface and a conduit outer surface, and a plurality of chambers in fluid communication with the conduit portion. The chambers include a first chamber defined, at least in part, by a first outer housing and a first chamber volume. The first chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the first chamber through a first flow area. The chambers also include a second chamber defined, at least in part, by a second outer housing and a second chamber volume. The second chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the second chamber through a second flow area. The first chamber volume is generally equal to the second chamber volume and the first flow area is greater than the second flow area. The chambers further include a third chamber defined, at least in part, by a third outer housing and a third chamber volume. The third chamber is in fluid communication with the conduit portion. A fluid is permitted to flow between the conduit portion and the third chamber through a third flow area, wherein the first chamber volume is greater than the third chamber volume. | 08-05-2010 |
| 20100193283 | NOISE REDUCTION SYSTEM - A noise reduction system for a device having a noise generating subsystem includes a Helmholtz resonator and a controller. The Helmholtz resonator is disposed in fluid communication with the noise generating subsystem, and includes an active material responsive to a control signal that adjusts a dimensional characteristic of the Helmholtz resonator in such a manner as to affect a resonance characteristic of the Helmholtz resonator. The controller is responsive to an operational characteristic of either the device or the noise generating subsystem to produce the control signal. In response to the operational characteristic, the control signal serves to affect the resonance characteristic of the Helmholtz resonator in such a manner as to reduce a noise arising from the noise generating subsystem, or create a desirable sound quality alteration. | 08-05-2010 |
| 20100224439 | 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 an interior of the branch passage and a controlling portion extending from the oscillating portion in a direction along an extending direction of the branch passage. | 09-09-2010 |
| 20110108358 | NOISE ATTENUATOR AND RESONATOR - A resonator attenuates sound waves at first and second frequencies. The resonator includes a first tube, and a second tube received within the first tube. Both tubes have an open end and a closed end. The first tube has an axial length which is longer than the axial length of the second tube. The first tube attenuates sound waves at the first frequency and the second tube attenuates sound waves at the second frequency. The second tube has an outer wall which engages an inner wall of the first tube. The open end of the second tube is surrounded by the open end of the first tube. The open end of the first tube is attached to an engine air intake conduit. The conduit communicates air from a charge air cooler to an engine intake manifold. | 05-12-2011 |
| 20110209941 | SUCTION MUFFLER FOR HERMETIC COMPRESSOR - The present invention discloses a suction muffler for a hermetic compressor which reduces noise of refrigerant. A plate film operating as a kind of flow resistance is provided on a refrigerant suction passage in various shapes and specific positions. Therefore, the suction muffler can effectively reduce pressure pulsation transferred to the outside and guarantee flow efficiency, although the refrigerant is directly sucked thereinto. | 09-01-2011 |
| 20110214936 | ANTI-NOISE DEVICE FOR THE AIR INTAKE CONDUIT OF A SUPERCHARGED INTERNAL COMBUSTION ENGINE - Anti-noise device for an internal combustion engine ( | 09-08-2011 |
| 20120181107 | RESONATOR - The present disclosure relates to a resonator, and more particularly, to a resonator installed at the rear of a turbo charger of a vehicle and combined with a Helmholtz resonator and a groove type resonator to attenuate both high-frequency noise and low-frequency noise. The resonator installed at the rear of a turbo charger of a vehicle to attenuate an inhaling noise includes: at least one Helmholtz resonator having a cavity in an air introduction path extending into a duct so that the cavity is formed in a radial direction of the duct; and at least one groove type resonator provided at the rear of the Helmholtz resonator and protruding outwards in the radial direction of the duct. | 07-19-2012 |
| 20120228053 | SILENCER FOR A TWO-STROKE MOTOR OF A POWER TOOL - A silencer for a two-stroke motor of a power tool, including a silencer inlet to which adjoins a flow channel of channel length so that the flow channel can be connected to an outlet of a combustion chamber of the two-stroke motor, whereby the flow channel at the channel end opposite the silencer inlet opens out into a first chamber of depth, between the silencer inlet and the first chamber the flow channel is so flow-beneficially designed, that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby creating a counterpressure in the direction of the combustion chamber, so that in spite of small geometric dimensions it provides a periodically actin counterpressure on the outlet of the combustion chamber of the two-stroke motor. | 09-13-2012 |
| 20130008737 | CONTROL DEVICE OF A MOTOR VEHICLE - A control device of a motor vehicle having a noise transmission system and an exhaust system, wherein the noise transmission system has, for manipulating an interior noise of the motor vehicle, at least one intake noise transmission device which can be coupled via a first tubular connecting element to an air intake pipe leading to an internal combustion engine, the first tubular connecting element being assigned a switchable shut-off device, and which can be coupled via a second tubular connecting element to a vehicle interior, wherein the exhaust system has at least one switchable shut-off device for manipulating an exterior noise of the motor vehicle, and wherein the control device manipulates the operation of the noise transmission system and of the exhaust system jointly as a function of an actuation of a common operating element by the driver. | 01-10-2013 |
| 20130008738 | SOUND TRANSMISSION SYSTEM - A sound transmission system of a motor vehicle, having an intake sound transmission device which can be coupled via a first tubular connecting element to an air intake manifold which leads to an internal combustion engine and via a second tubular connecting element to a vehicle interior, having a resonator device which interacts with the intake sound transmission device and can be coupled via a third tubular connecting element to the air intake manifold which leads to an internal combustion engine. | 01-10-2013 |
| 20130008739 | SOUND ABSORBING STRUCTURE - A sound absorbing structure includes multiple sound absorbers. The sound absorbers are assembled together into a sound absorbing member. The sound absorbing member absorbs sound emitted from a sound source. Each of the sound absorbers is shaped like a hollow tube. Each of the sound absorbers has a hole extending in its axis direction. | 01-10-2013 |
| 20130062141 | Compressor Intake Muffler And Filter - A muffler for a feed air system of a compressor assembly. The muffler can be a product of a blow molding process and used in a method of sound control for a compressor assembly. A method of controlling sound in a compressor assembly can have the step of providing a feed air and the step of providing the muffler an outlet in communication with an inlet of a pump assembly which can compress the feed air fed through the muffler and into the pump assembly. Sound control for a compressor assembly is also accomplished by adapting a feed air system to have sound control of a feed air path by dampening the sound emitted from a pump system through the feed air path. | 03-14-2013 |
| 20130277144 | NOISE ATTENUATOR AND VEHICLE AIR INTAKE DUCT PROVIDED THEREWITH - A noise attenuator which can reduce time and cost for installation thereof as compared with the conventional configuration and a vehicle air intake duct provided with the noise attenuator are provided. The noise attenuator includes a pair of circular through holes formed through a duct wall, a pair of wave transmitting/receiving membrane which are stretched so as to close the circular through holes, and a seesaw member which connects between central portions of the paired transmitting/receiving membranes. Accordingly, when one of the membranes receives a sound wave of noise thereby to be vibrated at a predetermined frequency, the other membrane follows it and is also vibrated while shifted by a half cycle. As a result, a cancellation wave with a phase opposite to the sound wave received by the one membrane is transmitted from the other membrane, whereupon the noise can be attenuated. | 10-24-2013 |
| 20140196978 | SILENCER AND METHOD FOR MANUFACTURING THE SAME - The invention relates to a silencer ( | 07-17-2014 |
| 20140251719 | SOUND ATTENUATOR OF AN EXHAUST-GAS TURBOCHARGER - A sound attenuator on the intake side of a compressor of an exhaust-gas turbocharger includes a tubular sound attenuator housing, which encases a flow duct between a face-side inlet opening and a rear-side outlet opening. A holding plate is provided in the sound attenuator housing in the flow direction and is perforated in the flow direction. For example, the holding plate can have a multiplicity of holes extending in the flow direction. The sound attenuator on the intake side of the compressor of an exhaust-gas turbocharger has a compact, lightweight and inexpensive structural form. The intake air is subjected to low resistance as it flows through the attenuation elements. | 09-11-2014 |
| 20150090523 | INTAKE APPARATUS OF ENGINE FOR OUTBOARD MOTOR - There is provided an intake apparatus of an engine for an outboard motor. An intake manifold, a throttle body and an intake silencer box are arranged at one side of an engine block configured such that an axial direction of a cylinder coincides with a front and rear direction of the outboard motor. The intake silencer box includes a main body part having a first air passage configured to guide air in the axial direction of the cylinder and coupled to the upstream end of the throttle body, and a cover part having a second air passage coupled to the first air passage and opened to an outside. An air filter element arranged orthogonal to an air flowing direction and interposed between the first air passage and the second air passage is fixed to a mating surface of the main body part and cover part. | 04-02-2015 |
| 20150361934 | MULTI-FREQUENCY QUARTER-WAVE RESONATOR FOR AN INTERNAL COMBUSTION ENGINE VEHICLE - A variable noise attenuation element is disclosed that comprises a tube, at least one valve seat, at least one valve body and a wire connected to the valve body. The tube has an overall length that defines a first effective length for noise attenuation. The valve seat is disposed in the tube. Retraction of the wire brings the valve body into engagement with the valve seat to selectively define a second effective length of the tube that is less than the overall length. | 12-17-2015 |
| 20160010603 | INTAKE NOISE REDUCTION DEVICE | 01-14-2016 |
| 20160061075 | MUFFLER SOUND-INSULATION STRUCTURE - A soundproof cover ( | 03-03-2016 |
| 20160123208 | AIR INDUCTION SYSTEM HAVING AN ACOUSTIC RESONATOR - A resonator for attenuating sound waves produced by an engine is provided. The resonator includes a housing. The housing includes first, second and third portions defining first, second and third working chambers, respectively. The first, second and third portions cooperate to define a substantially T-shaped resonator operable to attenuate sound produced by the engine. | 05-05-2016 |
| 20160195049 | SILENCER | 07-07-2016 |
| 20160201621 | RESONATER | 07-14-2016 |
| 20180025714 | SOUND DEADENING DEVICE | 01-25-2018 |
