| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 181264000 | With baffle or baffle structure | 83 |
| 20090283358 | SOUND-REDUCING BAFFLE - An accessory to an exhaust system is disclosed which reduces the decibel output from the engine of a vehicle while negligibly affecting the horsepower produced by the engine. The accessory can be built directly into an exhaust system by the manufacturer or added as an after-market enhancement by the consumer. The key elements to the device include a sound-funneling housing which circumscribes a diffusing element, both of which are removably or permanently capped on one side. The uncapped end of the housing is formed to engage a portion of the actual exhaust system. The overall result of this device reduces the total amount of noise produced, without noticeably affecting engine performance, while simultaneously inhibiting harmonic sound waves that can create an annoying rattling sound for the driver or passenger. | 11-19-2009 |
| 20090321181 | Inserts for engine exhaust systems - The insert for an engine exhaust system has at least one conical section of flexible mesh or rovings of metallic or other high temperature resistant fiber or tape. Each section includes a rigid anchor or attachment ring having an outer diameter closely conforming to the inner diameter of the exhaust pipe, with the anchor ring being welded to the mesh or roving or tape material or the mesh or roving or tape being crimped between two concentric rings. A smaller diameter support ring may be provided at the opposite end of the conical mesh, with the support ring braced by a series of radial arms. The device may serve to reduce the sound output of the exhaust system, and/or may serve as a spark arrestor as well. | 12-31-2009 |
| 20100000821 | MARINE MUFFLER WITH ANGULARLY DISPOSED INTERNAL BAFFLE - A marine muffler comprises an elongate cylindrical housing having an inlet and an outlet and defining an internal volume partitioned, by an angularly disposed internal baffle, into a lower chamber in communication with the inlet and an upper chamber in communication with the outlet. A vertically disposed duct is insertably secured to the baffle to allow exhaust gas and exhaust cooling water to flow from the lower inlet chamber to upper outlet chamber. The exhaust duct may preferably be further adapted with internal structure forming a plurality of individual flow conduits or passages. The duct is preferably positioned such that a plurality of flow passage inlets are positioned in proximity to the lower cylindrical housing wall, with flow passage outlets positioned in proximity to the upper housing wall. The lower duct wall may further be adapted with sidewall apertures for improving exhaust flow dynamics therethrough. | 01-07-2010 |
| 20100025146 | Baffle plate operating mechanism for muffler - A baffle plate operating mechanism for an exhaust which is connected an engine installed on a motor vehicle, e.g. motorcycles or automobiles, the baffle plate operating mechanism comprises a solid sleeve passing through and welded into the multiple layers of the muffler, a plurality of bushings mated in the solid sleeve and having a slit respectively, a shaft inserted into the sleeve, and a baffle plate mounted on the shaft and disposed inside the muffler. When the hot air exhausts from the engine, the solid sleeve isolate the thermal deformation between the multiple layers; and the bushing facing different directions can maintain the smooth rotation of the shaft completely. | 02-04-2010 |
| 20100059312 | PARTICLE MATTER CATALYST INSERTED MUFFLER - A particle matter catalyst inserted muffler may include a first exhaust gas discharge pipe penetratively joined to baffles and protruding in a predetermined length from a rear baffle for guiding outside an exhaust gas introduced into a muffler housing, and a second exhaust gas discharge pipe that fits in an end portion of the first exhaust gas discharge pipe while penetratively fitting in an end plate that is inserted into one opening of the muffler housing toward the rear bavbffle to be joined to the muffler housing. | 03-11-2010 |
| 20100065365 | AUTO-SENSING, AUTOMATIC ADJUSTING EXHAUST BAFFLE - An auto-sensing, automatic adjusting exhaust baffle; for reducing noise emissions produced by internal combustion engines, while improving overall engine performance, i.e., torque and horsepower. The design uses a spherical shape to evacuate spent exhaust gas, thus scavenging the surrounding exhaust gases to adjust the backpressure, while reducing the noise exiting the exhaust pipe at lower rpm's. The device uses a sphere with an internal bearing; sliding linearly on a shaft and said sphere and bearing being acted upon by exhaust gasses and a compression spring mounted axially over the diameter of the shaft. The purpose of this device is to reduce noise while improving tuning of the air/fuel intake system, by adjusting backpressure of the exhaust system. The lesser amount of exhaust pressure, the less the sphere moves, as in idle to just off of idle, this results in a quiet operational mode of the invention. As more exhaust pressure is presented, as in higher throttle positions, the more the sphere moves away from the discharge ports, the louder the sound will be from the exit end of the exhaust pipe, this results in the active mode of the invention, obtaining the desired sound and adjusted backpressure throughout the power band. | 03-18-2010 |
| 20100084220 | SOUND-ATTENUATING MUFFLER HAVING REDUCED BACK PRESSURE - A muffler for an internal combustion engine having a housing with an inlet end with an inlet opening formed for a flow of exhaust gases into the housing and an outlet end with an outlet opening formed for a discharge of exhaust gases from the housing; at least a first chamber, a intermediate and a last chamber sequentially arranged within the housing, the intermediate chamber containing a deflection element; a pipe passing longitudinally through the first chamber so as to open at its downstream end into the intermediate chamber, thereby directing the exhaust gases toward the deflection element; and a perforated pipe extending through the last chamber, the perforated pipe having an upstream opening into the intermediate chamber and configured to channel the exhaust gas to the outlet opening. A sound-attenuating material is deployed in at least one of the first chamber, the intermediate chamber and the last chamber. | 04-08-2010 |
| 20100108436 | ACOUSTICALLY TREATED EXHAUST CENTERBODY FOR JET ENGINES AND ASSOCIATED METHODS - An acoustically treated exhaust centerbody comprising a body including a body fore portion and a body aft portion. An internal passageway extends through the body in the axial direction. A resonator in the body fore portion includes a plurality of acoustic chambers. A plurality of ribs in the resonator form fore/aft walls of the acoustic chambers. Each rib is shaped substantially as a section of an annulus. A plurality of radial fins extend between adjacent ribs. The fins form sidewalls of the acoustic chambers. A skin overlies the acoustic chambers and forms an outer surface of the resonator. | 05-06-2010 |
| 20100116585 | MARINE MUFFLER WITH ANGULARLY DISPOSED INTERNAL BAFFLE - A marine muffler comprises an elongate cylindrical housing having an inlet and an outlet and defining an internal volume partitioned, by an angularly disposed internal baffle, into a lower chamber in communication with the inlet and an upper chamber in communication with the outlet. A vertically disposed duct is insertably secured to the baffle to allow exhaust gas and exhaust cooling water to flow from the lower inlet chamber to upper outlet chamber. The exhaust duct may preferably be further adapted with internal structure forming a plurality of individual flow conduits or passages. The duct is preferably positioned such that a plurality of flow passage inlets are positioned in proximity to the lower cylindrical housing wall, with flow passage outlets positioned in proximity to the upper housing wall. The lower duct wall may further be adapted with sidewall apertures for improving exhaust flow dynamics therethrough. | 05-13-2010 |
| 20100122869 | METHOD FOR REDUCING THE NOISE GENERATED BY A HOLE UNDER A HIGH ENERGY GAS FLOW - According to the invention, at least part of the edge of the hole is loosely surrounded with a mesh structure so as to create a space between the latter and said edge part. | 05-20-2010 |
| 20100163337 | MUFFLER - A muffler includes a muffler body in which a muffler chamber is formed by a base, a cover, and a baffle accommodated in the muffler chamber and disposed in the vicinity of the exhaust gas entry port of the muffler body. A guide portion which changes flow of an exhaust gas that enters from the exhaust gas entry port is integrally provided to the baffle by cut-and-raise of a portion of the baffle. | 07-01-2010 |
| 20100320028 | ACOUSTIC BAFFLE - A heat expandable baffle for sealing automotive cavities comprising a carrier plate with an outer perimeter and a strand of a heat expandable material along the major part of the outer perimeter, this strand circumscribing a central section of the carrier plate which is not covered by the heat expandable material, the outer perimeter defining a mean plane limited by the outer perimeter, the central section of the carrier plate being bent away from the mean plane in a way that the point on the central section which has the greatest distance from the mean plane lies at a distance from the mean plane which is at least 5% of the maximum linear length of the carrier plate, and/or the central section having a lumped mass distribution. | 12-23-2010 |
| 20110186379 | MUFFLER BAFFLE - Embodiments of the present invention provide an improved baffle for use in a muffler exhaust system and a system utilizing such baffle. The improved baffle comprises a first conduit portion having a first diameter, a second conduit portion having a second diameter, wherein the second diameter is greater than the first diameter, and a diameter step-up conduit connection portion having two ends, one that connects to the first conduit portion and the other that connects to the second conduit portion. The integrated baffle is disposed within the muffler of an exhaust system such that exhaust from an internal combustion engine enters the first conduit portion first, travels through the first conduit portion and then through the second conduit portion, and is then released into the air. Louvers disposed on the surface area of the first and second conduit portions reduce the noise of the engine while the step-up in diameter from the first conduit portion to the second conduit portion causes a pressure differential between the first conduit portion and the second conduit portion which lessens the back pressure applied on the engine and increases the performance and efficiency of the engine. | 08-04-2011 |
| 20110198150 | SILENCER - A silencer, particularly rear silencer, for an exhaust system of a combustion engine, particularly of a motor vehicle, has a housing in which an outlet chamber is located. An outlet pipe arrangement leads out of the housing which on the inlet side is fluidically connected to the outlet chamber. A particularly compact design can be realized if the outlet pipe arrangement is configured as pipe-in-pipe arrangement including at least one deflection pipe closed on one side and arranged in the housing and an outlet pipe led out of the housing. | 08-18-2011 |
| 20110209942 | EXHAUST DEVICE OF INTERNAL COMBUSTION ENGINE - An exhaust device of an internal combustion engine for reducing exhaust sound and for suppressing the occurrence of a torque valley. A sound-deadening and pressure-dissipating device connected to the downstream end of an exhaust pipe includes a spherical member having an opening portion opening toward a downstream edge of the exhaust pipe. Exhaust gas from the exhaust pipe is reflected by an inner spherical surface of the spherical member to reduce exhaust pressure in the spherical member and then is discharged from the opening portion. | 09-01-2011 |
| 20120031699 | Diesel Silencer Capable of Tier 3 or Tier 4 Operation - A Tier 4 ready silencer that can accept both DOCs and DPFs to meet Tier 3 and can interface with an SCR system to meet Tier 4. The invention includes a silencer compartment with empty filter/catalyst banks in the shape of a V. DOCs and DPFs can be added and arranged in the V-shaped banks as needed. Various exhaust fins direct exhaust flow through the filters/catalysts. Multiple exhaust inlets to the device provide the most direct route possible from the engine outlets. A mixing tube and an SCR system can be added to the output port to comply with Tier 4. | 02-09-2012 |
| 20120097479 | Baffle Arrangement for a Genset Enclosure - A baffle arrangement for a genset enclosure is disclosed. The genset enclosure may include an opening in a side of the enclosure and a plurality of baffles internally supported in the enclosure between the opening and a radiator portion. The baffles may be positioned in a sound path to reflect a sound transmitted along the sound path. A method for reducing sound in a genset enclosure is also disclosed. The method may include arranging a plurality of baffles within the enclosure between an opening and a radiator portion, the baffles being positioned in a sound path to reflect a sound transmitted along the sound path. | 04-26-2012 |
| 20130020147 | Tunable Muffler - A tunable muffler for a vehicle may include a center frame having a first cavity, a detachable connected base plate being detachably connected to the center frame and a tunable baffle to tune the muffler. The center frame may include a second cavity, and the tunable baffle may be mounted substantially 90° to the plane of the base plate. The baffle may be mounted substantially parallel to the plane of the base plate, and the baffle may be controlled by a control device. | 01-24-2013 |
| 20130087406 | ACOUSTIC BAFFLE DEVICE - An acoustic baffle device for sealing a cavity of a vehicle body at a predetermined cross section of the cavity is provided. The device has a carrier having an opening therein, a heat expandable sealing material affixed to the carrier, and a flap assembly having a flap normally held in place by a spring so as to close off the opening, wherein the flap is capable of being deflected by insertion of a tube through the opening. | 04-11-2013 |
| 20130175115 | Adjustable exhaust baffling device - An exhaust baffling assembly which allows for the operator of a motor vehicle to select between two or more modes varying between maximum noise control, and maximum performance. This device is easily installed in most motorcycle after-market exhaust systems by removing the supplied baffle, and mounting the presented device in the same mounting hole, making for a modification free installation. After this device is installed, the mode selections offered can be selected at the operators discretion by hand, and without tools. | 07-11-2013 |
| 20150027806 | Perforation Acoustic Muffler Assembly and Method of Reducing Noise Transmission Through Objects - A noise muffler is configured to substantially surround a sound generating object, disposed in or to be disposed in, a structure including a wall or ceiling to be sound limited by, and attenuate sound emitted from the sound generating object, the wall or ceiling including a board having an exposed surface and an opposite surface. The noise muffler has front, rear, left and right sides and a bottom. The sound generating object is positioned in the muffler cavity. The front, rear, left and right sides, and the bottom of the muffler are formed with an outer barrier layer. At least one of the front, rear, left, right sides and bottom of the muffler are formed with a noise absorbing layer positioned adjacent the outer barrier layer to absorb a predetermined amount of sound emitted from the object. At least one of the front, rear, left and right sides includes a first opening into the inner volume of the muffler cavity, the size of which first opening is adjustable. | 01-29-2015 |
| 20150041246 | BAFFLE FOR USE IN A SOUND SUPPRESSOR FOR A FIREARM - A baffle for use in a sound suppressor that is designed to minimize the sound that emanates from a fired firearm. The baffle generally includes a back section and a conical section. A bore extends through each of the sections and is sized for a fired projectile to pass through. The sides of one or both of the sections are configured to reduce the sound. Further, a second hole extends through the back section at the bore to allow for the passage of gases. | 02-12-2015 |
| 20150047921 | FLUID FLOW NOISE MITIGATION STRUCTURE AND METHOD - The structure for the reduction of noise occurring when a fluid flow passes over a surface is disclosed by the present application. The structure comprises a surface with a top face that is roughly parallel to the flow wherein the face has an array of multiple separate and discreet cavities inset into the surface. Each cavity may be tuned to mitigate the noise of a specific frequency of the flow by altering the size, shape, position, angle in relation to the flow and ratios of depth, width, and length of the cavity. The cavities may be divided by partitions into sub-cavities of differing sizes, shapes and positions to mitigate noise as well. The structures may be applied to any application where a flow exists over a surface including, but not limited to, aerospace, automotive, naval and electronics. The structure may be flat, curved, tubular or any other shape subject to fluid flow. | 02-19-2015 |
| 20150047922 | MUFFLER HAVING COUPLING OF A TAILPIPE BY MEANS OF A COUPLING CHAMBER - A muffler for an exhaust system of an internal combustion engine having a housing wall, having a muffler housing with at least one inlet pipe guided through the housing wall and at least one outlet pipe guided through the housing wall, wherein the inlet pipe has at least one outflow opening via which the exhaust gas can flow from the inlet pipe into the outlet pipe, whereby, within the muffler housing, at least one coupling chamber with a chamber wall is provided with a centre axis, which forms a flow channel between the inlet pipe and the outlet, whereby the chamber wall encloses the inlet pipe or the outlet pipe in the receiving direction E | 02-19-2015 |
| 20150292375 | Sound-Attenuating Muffler Having Reduced Back Pressure - A sound-attenuating muffler having a muffler housing with a volume displacement to engine displacement ratio of less than 8:1 and a width to height ratio between 1.05:1-3.5:1. The muffler also includes a partition configured to divide the muffler housing into separate compartments, the partition also having a partition opening for the passage of exhaust gases therethrough. A deflection element is attached to an upstream side of the partition along its width and height thereby provide at least one side opening on each side along the width and at least one end opening on each end along the height for the passage of exhaust gases therethrough. A ratio of the open area of both the end openings to the open area of the partition opening is between 0.7:1-3.7:1 and a ratio of an open area of both side openings to the open area of the partition opening is between 0.3:1-3.5:1. | 10-15-2015 |
| 20160146167 | SEALING DEVICE - A sealing device that is capable of suppressing the generation of unusual noise by guiding a gas flow and suppressing the generation of unusual noise caused by resonance between the gas flow and a pipe. An intake noise reduction portion ( | 05-26-2016 |
| 181265000 | Retroverted | 5 |
| 20090014237 | Muffler - A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine. The muffler including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. The inlet of the muffler being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The passage having a first side region and a second side region circumferentially spaced from the first region with a fluid passage in at least one of the first and second side regions. The muffler further including a side attenuation sound chamber adjacent the at least one of the side regions wherein the chamber is circumferentially spaced from the other of the at least one side region. | 01-15-2009 |
| 20090014238 | Muffler - A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. Further, the inlet being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The muffler further including an outer tank surrounding the passage and a tubular connector having a first end in fluid connection with the passage and a second end in fluid connection with the tank such that the connector produces a fluid connection between the passage and the tank. | 01-15-2009 |
| 20190145297 | MUFFLER | 05-16-2019 |
| 181266000 | And side branch chamber | 2 |
| 20100270103 | EXHAUST MUFFLER - A muffler for reducing the sounds of combustion gases exhausted from an internal combustion engine including an elongated fluid passage extending between an inlet and an outlet such that the outlet is in fluid communication with the inlet. Further, the inlet being connectable with the gases exhausted from the engine and the outlet being connectable with the atmosphere. The muffler further including an outer tank surrounding the passage and a tubular connector having a first end in fluid connection with the passage and a second end in fluid connection with the tank such that the connector produces a fluid connection between the passage and the tank. The connectors having a perforated resistance plate to restrict the fluid flow between said passage and said sound chamber thereby reducing the severity of the sound or fluid pulses entering and exiting said sound chamber, perforations in said perforated plate forming an open portion of said plate and said open portion being less than 60 percent. | 10-28-2010 |
| 20140151148 | EXHAUST MUFFLER - An exhaust muffler for an internal combustion engine including a housing having a sidewall, a first end plate and a second end plate spaced apart and located opposite the first end plate. A plurality of partitions may be disposed within the housing defining a plurality of chambers, including a resonator chamber, a cross-flow chamber, and an outlet chamber. An inlet pipe may be disposed through the housing into the resonator chamber and in fluid communication with the cross-flow chamber, the inlet pipe having a bend in the resonator chamber, wherein the inlet pipe is in fluid communication with the resonator chamber through a resonator aperture located in the bend. A resonator tube may be in fluid communication with the cross-flow chamber and the outlet chamber. An outlet pipe may be disposed through the housing and in fluid communication with the outlet chamber. | 06-05-2014 |
| 181268000 | Multi-passage | 9 |
| 20090266644 | Catalytic converter muffler - A catalytic converter muffler has a tubular housing with an inlet and outlet, and a baffle chamber intermediate the length thereof, a generally cylindrical catalytic converter supported in the tubular housing adjacent the inlet and a pair of tubular baffle members are disposed in the baffle chamber. An outlet offset baffle ring closing the inlet end of one of the baffles to block flow of gas thereinto, and an inlet offset baffle element closes the outlet end of the other of the baffles to block flow of gas outwardly to the outlet end of the housing. A power bar is provided in the outlet baffle closely adjacent the outlet end thereof to interrupt the harmonic waves of the base in the outlet baffle. The exhaust gas flows from the catalytic converter into the other baffle and thence through the perforations into the outlet baffle through the perforations in the inlet baffle and through the perforations in the outlet baffle. | 10-29-2009 |
| 20100006370 | SOUND-ATTENUATING MUFFLER HAVING REDUCED BACK PRESSURE - The present invention relates to an improvement muffler that includes an improved inlet configuration having first and second sequential chambers with a perforated central pipe passing longitudinally through a central region of both chambers for directing the exhaust gases into the third chamber in which the deflection element is deployed. Additionally, the partition separating the first and second chamber has a hole that enables some of the gas to pass from the first chamber into the second chamber not through the central pipe. | 01-14-2010 |
| 20110073405 | Exhaust Component - An exhaust component is provided including an inlet portion for accepting an exhaust stream entering therein from an exhaust system, two or more separator components fixed to the inlet portion for separating the exhaust stream into two or more streams at the point of egress from the inlet portion, two or more chambers fixed to the separator components, the chambers for muffling sound of the exhaust stream, two or more collector components fixed to the chambers opposite the separator components for collecting the separated exhaust streams upon egress from the chambers, and one or more outlet portions fixed to the collector components at the end opposite the chambers for carrying separated or merged exhaust streams out of the exhaust component. | 03-31-2011 |
| 20130233643 | Frequency-Modifying Muffler - A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows. | 09-12-2013 |
| 20130270034 | SILENCING APPARATUS FOR VEHICLE - A silencing apparatus for a vehicle includes: a muffler ( | 10-17-2013 |
| 20140144721 | MUFFLER FOR MOTOR VEHICLE - A muffler for a vehicle is provided, including: a muffler housing having a first housing body and a second housing body that are divided in two parts and form an internal space with an inlet opening and an outlet opening when combined; and an internal structure inserted and forced into the internal space of the muffler housing to be detachable from the muffler housing, and allowing an exhaust gas discharged from an engine to flow into the internal space and to be discharged out of the muffler housing through a predetermined path. | 05-29-2014 |
| 20150014091 | Frequency-Modifying Muffler - A muffler for raising the audible pitch of an internal combustion engine's exhaust note that includes an enclosed case having an inlet and an outlet, and a plurality of flow-directing components which are adapted to subdivide an inlet flow into a plurality of discrete interior flows, including a first interior flow providing the shortest flow length through the muffler between the inlet and the outlet, a second interior flow having a flow length at least about twice the length of the first interior flow, and one or more intermediate flows following by-pass passages to split off from the second interior flow between the inlet and the outlet and having flow lengths between the flow lengths of the first and second flows. | 01-15-2015 |
| 20150053501 | Tailor to Fit Muffler - A muffler includes a shell, baffles, and a plurality of pipes. The shell defines first and second end cavities and a central cavity. The end cavities have larger cross-sectional areas that a cross-sectional area of the central cavity. The baffles cooperate to form multiple chambers within the shell. A first inlet directs a first portion of the exhaust into a first chamber. A second inlet directs a second portion of the exhaust into a second chamber. A first pipe extends through first, third and fourth baffles and includes an inlet in the fourth chamber. The first pipe directs exhaust from the fourth chamber to a first outlet at the first end cavity. A second pipe extends through the second, third and fourth baffles and includes an inlet in the third chamber. The second pipe directs exhaust from the third chamber to a second outlet at the second end cavity. | 02-26-2015 |
| 20160145820 | INTEGRATED MUFFLER FOR HYDROVAC SYSTEM - An integrated tank has a debris-storage chamber, a water-storage chamber, and a muffler system. The muffler system is disposed proximate the water-storage chamber. The muffler system includes a bypass muffler and a discharge muffler. | 05-26-2016 |
| 181269000 | Expansion chamber type | 19 |
| 20090308687 | MUFFLER FOR VEHICLE - A muffler of a vehicle includes a first muffler body so as to form a first chamber, at least a second muffler body including a housing, one end portion opened and the other end portion closed, wherein one of the second muffler bodies is fitted into the other end portion of the first member to form a second chamber and the other second muffler bodies are fitted into each other through the one end portions in series to form third chambers if more than one second muffler bodies are assembled, an inflow pipe to connect the outside with the first, second and/or third chamber by passing the one end portion of the first muffler body, and an outflow pipe to communicate the first, second, and/or third chamber with the outside by passing through the other end portion of the last second muffler body. | 12-17-2009 |
| 20100006371 | ACOUSTIC MUFFLER FOR A REFRIGERATION COMPRESSOR - The acoustic muffler comprises a hollow body ( | 01-14-2010 |
| 20100282538 | Muffler having fluid swirling vanes - A muffler for an internal combustion engine has a casing forming an expansion chamber therein. An inlet duct is connected to the casing and projects into the expansion chamber and discharges exhaust fluid into the expansion chamber. The casing tapers in an upstream direction to form a pocket for receiving reverse flow of the exhaust gases and to minimize reverse flow from flowing back into the inlet duct in an upstream direction. In the discharge end of the inlet duct are a set of primary vanes and a set of secondary vanes. The vanes are secured to the walls of the duct and extend radially toward the central area of the duct. The vanes are angled in order to deflect the exhaust fluid flow into a swirling movement as it is discharged into the expansion chamber and maintains that swirling movement while passing out of the casing through the outlet duct. | 11-11-2010 |
| 20110192677 | EXHAUST MUFFLER DEVICE - An exhaust muffler device for an internal combustion engine includes an outer housing which defines a sealed chamber and which is connected to opposite inlet and outlet pipes, and an initial expansion subchamber and a pre-outlet subchamber disposed in the sealed chamber. The exhaust gas enters the initial expansion subchamber and mainly flows to a tubular passage in the pre-outlet subchamber to be exhausted through the outlet pipe. Portion of the exhaust gas flows into the sealed chamber and re-enters into a rejoining region of the tubular passage to be entrained in the main stream, thereby attenuating noise of the engine with minimal reduction of engine performance. | 08-11-2011 |
| 20110297479 | DIFFUSER MUFFLER - A muffler for attenuating acoustic noise in a gas flow that includes a casing having a substantially-rectangular cross-section with an inlet opening in an inlet end and an outlet opening in an outlet end, so that a gas flow containing acoustic noise passes from the inlet opening to the outlet opening. The muffler also includes a V-shaped sound diffuser disposed within the casing and spanning the distance between opposing top and bottom walls of the casing. The sound diffuser comprises a pair of elongate leg plates having base ends attached to the outlet end on opposite sides of the outlet opening, and tip ends merged into an apex that is aligned with the inlet opening. Each leg plate has a plurality of apertures formed therein, and the apex splits the inlet gas flow into two side flows, with each side flow passing through the plurality of apertures in one of the leg plates to reach the outlet opening. | 12-08-2011 |
| 20150101886 | SYNTHETIC JET MUFFLER - A synthetic jet muffler includes an exit end, a propagation path for conducting a first sound wave emitted by a synthetic jet generator to the exit end, and a shroud for conducting a second sound wave emitted from the synthetic jet generator in a direction opposite to the first sound wave to the exit end, wherein the shroud is disposed so that the first and second sound waves travel different distances to effect noise cancellation at the exit end. | 04-16-2015 |
| 20160017787 | EXHAUST PIPE - An exhaust pipe that forms an exhaust flow channel includes a first flow channel member that forms part of the exhaust flow channel, and a second flow channel member connected in series with the first flow channel member, and forms part of the exhaust flow channel. A downstream-side end of the first flow channel member is inserted into an upstream-side end of the second flow channel member. A communication channel that communicates between an inside and an outside of the exhaust pipe is formed between an outer surface of an insertion part of the first flow channel member and an inner surface of an insertion-receiving part of the second flow channel member. The insertion-receiving part is arranged to face higher than a horizontal direction. | 01-21-2016 |
| 181270000 | With alternating partial baffles along the length of casing | 1 |
| 20090107761 | EXHAUST SOUND AND EMISSION CONTROL SYSTEMS - The exhaust sound and emission control systems reduce sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination therewith in a single device. Alternatively, the system may have multiple angularly disposed chambers therein, with a series of swept baffles or guides in one of the chambers, thereby combining resonator and muffler functions in a single device. In another alternative, the system has a series of longitudinal tubes therein in combination with a series of V-shaped guides or vanes, combining catalytic converter, muffler, and resonator functions in a single device. The various elements of the system, e.g., catalytic converter element(s), double wall shell, perforated tubes and multiple flow paths, interconnecting crossover tubes, etc., may be combined with one another as practicable. | 04-30-2009 |
| 181271000 | With adjustable or flexible wall | 1 |
| 20100126799 | MUFFLER AND ENGINE EXHAUST APPARATUS - A muffling chamber ( | 05-27-2010 |
| 181272000 | Plural chambers | 9 |
| 20090114477 | Exhaust system for a motorcycle, and motorcycle incorporating same - An exhaust system for a motorcycle includes exhaust pipes extending from exhaust ports of an engine, a first muffler chamber for receiving the exhaust pipes, a second muffler chamber arranged parallel to and operatively connected with the first muffler chamber, and a silencer disposed in the second muffler chamber. The exhaust system is distributively arranged in a vehicle width direction such that the first muffler chamber is situated on a left side of a center line of the motorcycle defined along longitudinal direction of the motorcycle, and the second muffler chamber is situated on a right side of the center line. The first and second muffler chambers are disposed at a position below the engine. The exhaust gas from the engine is emitted outside the engine via, in sequence, the exhaust pipes, the first and second muffler chambers and the silencer. | 05-07-2009 |
| 20090145689 | MUFFLER OF VEHICLE AND EXHAUST APPARATUS USING THE SAME - A muffler includes a case divided into three chambers by two baffles. The first chamber is closest to, and the third chamber is farthest from, the exhaust pipe. An inlet pipe has a first end connected to the exhaust pipe, and a second end in fluid communication with the third chamber. An outlet pipe expels exhaust and water from the first chamber to the exterior. A connecting pipe provides fluid communication between the first and third chambers. The second end of the inlet pipe is above the bottom interior surface of the outlet pipe. The inlet pipe may have holes in the second chamber, above the bottom interior surface of the outlet pipe. The connecting pipe may have holes in the second chamber. The baffles may have holes for the water to flow from the second and third chambers to the first chamber. Also, an exhaust apparatus utilizing the muffler. | 06-11-2009 |
| 20100307865 | SILENCER FOR INTERNAL COMBUSTION ENGINE - A silencer for an internal combustion engine includes a silencer housing formed by a pair of clamped housing members each having a substantially identical configuration relative to one another. The silencer housing has an intake port formed at a first end and an exhaust port formed at a second, opposite end. At least one separator is received in the silencer housing between and spaced apart from the first end and the second end. The at least one separator extends transversely across the silencer housing relative to a longitudinal length of the silencer housing. | 12-09-2010 |
| 20120111663 | RESONATOR FOR A DUAL-FLOW EXHAUST SYSTEM - A resonator for a dual-flow exhaust system of an engine is provided. The resonator includes a housing defining an enclosure and a baffle spanning the housing and separating a first and second expansion chamber of the enclosure, the baffle including at least one opening. The resonator further includes a first and a second exhaust conduit extending through the baffle and housing, each conduit in fluidic communication with a separate cylinder bank and including a perforated portion fluidly coupled to the enclosure, each perforated portion positioned in separate expansion chambers. | 05-10-2012 |
| 20120228055 | EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust muffler for improving the timbre of an exhaust sound in a low engine speed region and for increasing an engine output in a high engine speed region. In an exhaust device for an internal combustion engine for discharging an exhaust gas from the internal combustion engine through a multistage expansion type muffler having a plurality of expansion chambers for silencing the sound of the exhaust gas during the passage thereof, the multistage expansion type muffler includes a first tail pipe for communicating between a most downstream one of the expansion chambers and the outside of the muffler and a second tail pipe for communicating between an upstream one of the expansion chambers on the upstream side of the most downstream expansion chamber and the outside of the muffler. | 09-13-2012 |
| 20140196980 | SILENCING APPARATUS FOR A VEHICLE - A muffler has a flattened cross-sectional shape the width of which is greater than its height. The muffler includes therein a plurality of expansion chambers. The muffler also includes an inlet pipe, an outlet pipe and first to third communication pipes, through which the expansion chambers are open to the outside. All of an opening of the inlet pipe, an opening of the outlet pipe and openings of the first to third communication pipes formed in the muffler are arranged such that they fall between a position separated away from one end of the muffler in its width direction by a ¼ length of the width of the muffler and a position separated away from the end of the muffler by a ½ length of the width. | 07-17-2014 |
| 20140284138 | ENGINE MUFFLER - An engine muffler includes a cylindrical muffler body whose interior is partitioned by at least one partition plate in a longitudinal direction of the muffler body into a plurality of expansion chambers. The muffler body is constructed of a plurality of divided muffler body members divided from each other in the longitudinal direction at the position of the partition plate, and a gap is provided between opposed end portions of the divided muffler body members. The partition plate has an annular section held in fitting engagement with the inner peripheral surface of at least one of the opposed end portions, and it is positioned in such a manner as to close the gap. The opposed end portions are welded, from a radially outward direction, to the outer peripheral surface of the annular section along their respective entire perimeters. | 09-25-2014 |
| 20160186735 | ACOUSTIC ATTENUATOR DEVICE FOR COMPRESSORS - The present invention refers to a compressor with an acoustic attenuator device, preferably those used in refrigeration systems, in general. More specifically, the present invention refers to an acoustic attenuator device comprising technical, structural, and functional features capable of simplifying the method of fabricating these parts and increasing acoustic attenuation levels of hermetic compressors, in general. In this sense, the attenuator device of the present invention comprises a hollow body closed by a cover to form a structure having at least one inlet hole and an outlet hole, wherein there is provided between said hollow body and said cover at least one intermediate body dividing said structure into at least two acoustic chambers (A, A′), and is formed by a platform provided with a connecting channel, which is in fluid communication between said acoustic chambers (A, A′) and further surrounds an outlet channel, which is interconnected with said outlet hollow disposed on said cover. | 06-30-2016 |
| 20160376952 | EXHAUST RESONATOR FOR A TWO-STROKE ENGINE FOR USE IN A MOTORIZED FLOAT - An exhaust resonator comprises a first cover having an inlet. A first end of a stabilizer tube is connected to the inlet. A second end of the stabilizer tube aims at a primary reflection surface at a first end of an expansion cone surrounding the stabilizer tube to define a first expansion space. A second end of the expansion cone aims at a secondary reflection surface inwardly of a first cover. A first end of an outer case surrounds the expansion cone. A second end of the outer case connects to a second cover that is provided with the outlet. A second expansion space is defined by the expansion cone and the outer case. The second expansion space is terminated by a baffle with an opening on an interface between the outer case and the second cover. The first cover is provided with at least one coolant liquid opening. | 12-29-2016 |
| 181274000 | With centrifugal flow | 1 |
| 20110180347 | SPIN MUFFLER - A muffler for attenuating acoustic noise in a gas flow which includes a casing having an inlet and an outlet, such that the gas flow passes through the casing from the inlet to the outlet. The muffler also includes an acoustic trap disposed within the casing and which spans the distance between opposing top and bottom walls of the casing. The acoustic trap further comprises a first arcuate deflector having a concave frontside surface configured to direct the gas flow from the inlet through a first segment of an expanding spiral revolution, and one or more second arcuate deflectors which are radially offset from the first arcuate deflector and configured to direct a portion of the inlet gas flow through a remainder segment of the expanding spiral revolution. | 07-28-2011 |
| 181276000 | Side branch | 4 |
| 20100193284 | EXHAUST CHAMBER FOR THE EXHAUST LINE OF AN AUTOMOBILE - The exhaust chamber for a motor vehicle exhaust line includes: a main envelope defining a main enclosure and having an exhaust gas inlet and an exhaust gas outlet; and at least one saucer-shaped shell having an opening defined by a peripheral edge of the shell, the or each shell being tightly connected to an outside surface of the main envelope along the peripheral edge, the shell, with the main envelope, defining a secondary enclosure. The main envelope has, beneath the shell, a plurality of perforations for placing the main enclosure in communication with the secondary enclosure. The main envelope has, in a first area located beneath the shell, at least one slot for increasing the elasticity of the first area, and/or the main envelope has, in a second area that is not covered by the shell, at least one rib for increasing the stiffness of the second area. | 08-05-2010 |
| 20110061970 | ACCOUSTIC ATTENUATION DEVICE FOR AN INTAKE LINE OF A COMBUSTION ENGINE AND INTAKE LINE INCORPORATING SAME - The present invention relates to an acoustic attenuation device for an intake line of an internal combustion engine and to an intake line such as this incorporating same. An acoustic attenuation device according to the invention is intended to have a flow of pressurized gaseous fluid passing through it and comprises:
| 03-17-2011 |
| 20110073406 | Acoustic Silencer - A resonator is disclosed which includes: a sleeve insert and an outer duct sealingly coupled to the sleeve insert. The sleeve insert has a wall with a first aperture in the wall at a first axial distance, a second aperture in the wall at a second axial distance, and a rib extending radially outwardly with the rib located between the first and second apertures. The outer duct sealingly couples to the sleeve insert proximate first and second ends of the inner sleeve and at the rib. The sleeve insert and the outer duct are formed of plastic materials which are coupled by welding or via o-rings placed on the sleeve insert. Cavities, in the vicinity of the apertures, are formed in the outer duct. The cavities, which are fluidly coupled to the sleeve insert via the apertures, attenuate noise. | 03-31-2011 |
| 20160010524 | Muffler For Automobile | 01-14-2016 |
| 181279000 | Spiral | 5 |
| 20090050404 | Sound Dampening Flow Channel Device - The invention presents a sound dampening flow channel device defining at least one flow channel having an inlet opening and an outlet opening, the flow channel being at least partly delimited by at least one acoustic energy dissipative wall. The outlet opening of the flow channel cannot be seen from the inlet opening and vice versa. Preferably, the acoustic energy dissipative wall presents, in relation to the interior of the flow channel, a smooth curvature. | 02-26-2009 |
| 20140158463 | Accoustic Baffle For Centrifugal Blowers - An acoustic baffle for reducing noise of a centrifugal fan includes a base for mounting with a fan outlet and a projection extending from the length of the base at a back side of the base and curving away from a top surface of the base. The projection continuously tapers from the base to an apex that aligns with a center line of the base. The projection extends over the fan wheel and tapers from left and right sides of the outlet to a fan tangency point at a midpoint of the outlet and aligned with the apex, when the acoustic baffle is installed in the outlet. The acoustic baffle effects a gradual variation in radial and tangential airflow at the blower outlet, to reduce fan blade passage tone. | 06-12-2014 |
| 20140251721 | HVAC BLOWER WITH NOISE SUPPRESSION FEATURES - A blower for an HVAC system of a motor vehicle. A fan is supplied with airflow by a duct having a bend adjacent to the fan that causes a low-pressure region at a face of the fan. A baffle is located immediately adjacent to the fan face and collocated with at least a portion of the low-pressure region to impede airflow through the face of the fan at that location. The baffle acts to reduce unwanted low frequency noise and improves the mechanical efficiency of the fan. The baffle covers a circular segment of the fan face and may have sound-suppressing features, such as ridges formed on at least one surfaces. | 09-11-2014 |
| 181280000 | Helical | 2 |
| 20080245607 | AIR EXHAUST/INLET SOUND ATTENUATION MECHANISM - An attenuation mechanism for an electronic device is presented. The attenuation mechanism includes an outer member that has an inner member oriented axially within the outer member. The inner member has an axial twist that causes a line of sight blockage between an exterior and an interior of a housing of an electronic device when the attenuation mechanism is mounted through the housing, such that sound and electromagnetic radiation is attenuated without obstructing cooling air that is flowing through the housing. | 10-09-2008 |
| 20110308884 | SOUND ABSORBER HAVING HELICAL FIXTURES - A sound absorber comprises an elongated gas channel, through which a flowing gas passes in operation of the sound absorber; and at least one helical fixture mounted in a longitudinal section of the gas channel. The helical fixture defines a helical gas passage through the longitudinal section of the gas channel. Further, the helical fixture defines at least one longitudinal Helmholtz resonator within the gas channel which is excited by sound waves propagating in the flowing gas passing through the at least one gas channel. | 12-22-2011 |
| 181281000 | Perpendicular and/or oblique | 1 |
| 20090045007 | Muffler with cyclonic plates - A muffler comprising a multiplicity of plates, each plate having openings for directing gas flow is provided. The present invention's objective is to reduce engine noise while minimizing back pressure on the engine. It uses a series of plates with deflecting elements fixedly attached to the plates. These deflectors are intended to move the exhaust gases from a longitudinal motion to a cyclonic or swirling motion, so as to translate the gases longitudinal motion into a circular motion. This energy translation will reduce the gas' pressure as it exits the muffler and reduces the engine's noise, without the necessary use of sound absorbing materials or a resonating chamber. This energy translation does not affect the rate | 02-19-2009 |
| 181282000 | Casings | 14 |
| 20090127025 | Triangular cross section exhaust muffler - The present invention is for a triangular cross section symmetrical engine exhaust muffler for an internal combustion engine. Its internal design provides baffles symmetrically disposed about a plane centrally located equidistant from the ends of a tube having a triangular cross section. The design has three baffles spaced to minimize backpressure but angled to enhance acoustic reflections within the chamber formed by the tube having a triangular cross section, baffles, and the affixed endplates including the inlet/exhaust ports. These acoustic reflections serve to modify the sound emanating from the exhaust manifold or manifolds of the internal combustion engine. The muffler chamber also serves to smooth out the pulsating gas flow emanating from the engine as a result of the combustion cycle. | 05-21-2009 |
| 20090188747 | METHOD OF MAKING AN EXHAUST-NOISE ATTENUATION MUFFLER, AND EXHAUST-NOISE ATTENUATION MUFFLER - An exhaust-noise attenuation muffler includes two half-shells, each including an inner shell and an outer shell which are made through deep drawing of a sheet metal blank which can have a thickness between 0.3 mm and 0.5 m. The inner shell or the outer shell is provided with an embossment. After placing the inner shells in corresponding ones of the outer shells to form half-shells, two complementing half-shells are joined together. | 07-30-2009 |
| 20090301808 | MUFFLER STRUCTURE FOR VEHICLE - The invention obtains a muffler structure for a vehicle which can suppress an emission sound. In a muffler shell for a muffler for a vehicle, there are formed a peripheral joint in which an upper shell and a lower shell corresponding to a plurality of shell structure portions are joined in respective peripheral joint flanges and, and an inter-isolation chamber joint in which the upper shell and the lower shell are joined in inter-isolation chamber joint flanges and in such a manner as to partition a space positioned in an inner side of the peripheral joint into a plurality of isolation chambers and arranged in parallel in a gas flow direction. | 12-10-2009 |
| 20100116586 | MUFFLER AND CORRESPONDING MANUFACTURING PROCESS - A muffler ( | 05-13-2010 |
| 20100170744 | MOTOR VEHICLE EXHAUST LINE SILENCER - A motor vehicle exhaust line silencer includes: an upper shell ( | 07-08-2010 |
| 20100193285 | SILENCER COVER FOR SADDLE-RIDE TYPE VEHICLE - A silencer cover adapts to a heat expansion of a silencer even when, for example, the silencer cover has a large size and is attached to the silencer over an area from the front to the rear. A silencer cover is provided for a silencer connected to a downstream end of an exhaust pipe of an engine. The silencer cover is fixed to a fixing support provided to the silencer. The silencer is heat-expanded with the fixing support part fixed as a base. The fixing support part is provided at a front end portion, in a vehicle front-rear direction, of the silencer. With a tail pipe constituting a rear end portion of the silencer, the rear end portion of the silencer is provided with a slide structure in which the silencer cover is slidably supported. | 08-05-2010 |
| 20120325578 | MUFFLER ASSEMBLY AND METHOD OF MAKING | 12-27-2012 |
| 20130199870 | EXHAUST MUFFLER - An exhaust muffler includes a pair of base members disposed substantially parallel to one another and defining an exhaust entry and exhaust exit. At least one wall member is coupled to the base members. The at least one wall member is intermediate the base members and intermediate the entry and exit. The at least one wall member includes a linear portion coupled to a semicircular portion. | 08-08-2013 |
| 20130256056 | Acoustic Baffle For Centrifugal Blowers - An acoustic baffle for reducing noise of a centrifugal fan includes a base for mounting with a fan outlet and a projection extending from the length of the base at a back side of the base and curving away from a top surface of the base. The projection continuously tapers along at least one side from an area proximate the base to an apex. The apex aligns with a fan tangency point, and the apex or a trough of the projection aligns with a midpoint of the outlet, when the acoustic baffle is installed in the outlet. The acoustic baffle effects a gradual variation in radial and tangential airflow at the blower outlet, to reduce fan blade passage tone. | 10-03-2013 |
| 20130264144 | METHOD AND APPARATUS FOR A LOUDSPEAKER ASSEMBLY - The present invention relates to a loudspeaker assembly and a method of assembling a loudspeaker assembly. In one or more embodiments, the invention comprises forming a front baffle comprising a first driver mounting portion, an intermediate portion, and an edge mounting portion. A first driver is installed in the first driver mounting portion proximate to a first driver aperture. A rear baffle is formed from a second material, which, in one or more embodiments, is less stiff than the first material from which the front baffle is formed. The rear baffle comprises a top portion, sidewalls, a recessed mounting portion, and an edge portion. The edge mounting portion of the front baffle is attached to the recessed mounting portion of the rear baffle such that an entirety of said front baffle is recessed within said rear baffle spaced apart from said open bottom portion. | 10-10-2013 |
| 20140151149 | CONFORMAL TRANSVERSE MUFFLER - Embodiments in accordance with the present disclosure may provide a conformal transverse muffler including an enclosure shaped to fit around a bottom and a side of a feature of a vehicle. The enclosure may include a mid section fittable below the feature, and two side sections fittable in opposite locations only radially outside of a circumference of the spare tire well. The side sections may be thicker than the mid section and may have a vertical center above a vertical center of the mid section. | 06-05-2014 |
| 20140174848 | EXHAUST FLOW SPARK ARRESTOR - A spark arrestor is provided. The spark arrestor includes a housing and an inlet tube. The inlet tube is configured to receive an exhaust flow into the housing. A first baffle is positioned within the housing. The first baffle has a curved configuration and is placed such that a convex side of the first baffle faces the exhaust flow. A second baffle is positioned within the housing. The first baffle and the second baffle are configured to separate particles from the exhaust flow. An outlet tube is present within the housing and is positioned centrally in relation to the first baffle and the second baffle. An end of the outlet tube is configured to contact a concave side of the first baffle. Further, the outlet tube includes a plurality of perforations at the end. The perforations are configured to receive air separated from the exhaust flow into the outlet tube. | 06-26-2014 |
| 20140311821 | EXHAUST MUFFLER - An exhaust muffler includes a pair of base members disposed substantially parallel to one another and defining an exhaust entry and exhaust exit. At least one wall member is coupled to the base members. The at least one wall member is intermediate the base members and intermediate the entry and exit. The at least one wall member includes a linear portion coupled to a semicircular portion. | 10-23-2014 |
| 20140311822 | CONFORMAL TRANSVERSE MUFFLER - Embodiments in accordance with the present disclosure may provide a conformal transverse muffler including an enclosure shaped to fit around a bottom and a side of a feature of a vehicle. The enclosure may include a mid section fittable below the feature, and two side sections fittable in opposite locations only radially outside of a circumference of the spare tire well. The side sections may be thicker than the mid section and may have a vertical center above a vertical center of the mid section. | 10-23-2014 |
