| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 181264000 |
With baffle or baffle structure
| 83 |
| 181228000 |
With exhaust pipe
| 70 |
| 181213000 |
Reaction engine type
| 64 |
| 181247000 |
Straight-through passage
| 53 |
| 181224000 |
Sound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type)
| 46 |
| 181223000 |
Silencer for firearms
| 41 |
| 181229000 |
Carburetor, burner, or compressor intake silencer
| 34 |
| 181256000 |
With sound absorbing material
| 31 |
| 181227000 |
Pipe-muffler (e.g., tail pipe type)
| 31 |
| 181233000 |
Liquid motion silencer
| 11 |
| 181241000 |
Adjustable muffler (i.e., internal or external parts)
| 8 |
| 181226000 |
With adjustable fluid flow
| 6 |
| 181235000 |
Underwater discharge | 5 |
| 20080236942 | EXHAUST APPARATUS FOR SMALL BOAT - An exhaust apparatus for a small boat for reducing exhaust noise. A water muffler is provided at a midsection of the exhaust pipes extending from an engine which is provided in a boat body. An interior of the water muffler is partitioned into an expansion chamber and a resonator chamber with a front exhaust pipe connected to the engine and a rear exhaust pipe opening out of the boat being interlinked with the expansion chamber. The resonator chamber is directly connected to the midsection of the rear exhaust pipe via a connecting pipe. The water muffler is arranged in a longitudinal direction that is oriented in the fore-and-aft direction so as to extend along the side of a pump chamber in which a jet pump driven by the engine is arranged. A second resonator chamber is arranged along the water muffler on the outer side of the water muffler. | 10-02-2008 |
| 20090301806 | Method and apparatus for altering and/or minimizing underwater noise - To reduce or eliminate the startle response in aquatic life, embodiments of the present invention alter the sound produced by a diver's exhaled bubbles by adjusting up or down the frequency of the sound produced by the bubbles. | 12-10-2009 |
| 20100012422 | FLAPPER CONFIGURATION FOR MARINE EXHAUST SYSTEM - Disclosed are apparatus and methodology for reducing noise and wear in a flapper configured exhaust tip for a marine exhaust system. A flapper, normally located within an exhaust tip of a marine exhaust system, is relocated upstream of the point in the exhaust system where cooling water normally contacts the exhaust pipe. An exhaust tip is coupled to the upstream portion of the exhaust system by way of an elastomeric coupling device. The flapper is positioned such that a tip thereof contacts the elastomeric coupling rather than the metallic exhaust pipe. Such contact with an elastomeric coupling device reduces noise previously produced by flapper contact with the hot exhaust pipe occasioned by destruction and/or heat degeneration of elastomeric material generally associated with the flapper device. | 01-21-2010 |
| 20110011669 | SOUND DAMPENING AND WEAR PROTECTING FLAPPER CONFIGURATION FOR MARINE EXHAUST SYSTEM - Disclosed are apparatus and methodology for reducing noise and wear in a flapper configured exhaust tip for a marine exhaust system. A metallic flapper is located at an end portion of an exhaust tip of the exhaust pipe. An elastomeric flapper assembly is provided covering the exhaust tip and includes a lip portion configured to provide noise reduction by functioning as a stop for a tip portion of the metallic flapper. The metallic flapper is positioned such that a tip thereof contacts the elastomeric flapper assembly rather than the metallic exhaust pipe. Such contact with an elastomeric flapper assembly reduces noise previously produced by flapper contact with the hot exhaust pipe. | 01-20-2011 |
| 20130001010 | ABATING LOW-FREQUENCY NOISE USING ENCAPSULATED GAS BUBBLES - Air bubbles may be used to reduce radiated underwater noise. Two modalities of sound attenuation by air bubbles were shown to provide a reduction in radiated sound: bubble acoustic resonance damping and acoustic impedance mismatching. The bubbles used for acoustic resonance damping were manifested using gas-filled containers coupled to a support, and the acoustic impedance mismatching bubbles were created using a cloud of freely-rising bubbles, which were both used to surround an underwater sound source. | 01-03-2013 |
| 181230000 |
Pneumatic type motor (e.g., air hammer, etc.) | 5 |
| 20090294211 | NOISE REDUCING DEVICE FOR A PNEUMATIC TOOL - A noise reducing device includes a housing defining an expansion chamber therein and having a longitudinal axis along the length of the expansion chamber and a tool port in fluid communication with the expansion chamber, the tool port being oriented transversely relative to the longitudinal axis so as to cause fluid directed from the tool port to the expansion chamber to whirl about the expansion chamber. | 12-03-2009 |
| 20100089689 | SILENCER FOR PNEUMATIC DEVICE - The present invention provides a silencer, which is coupled to a pneumatic device to reduce noise. The silencer ( | 04-15-2010 |
| 20100155174 | NOISE ABATEMENT DEVICE FOR A PNEUMATIC TOOL - Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing. | 06-24-2010 |
| 20100288581 | MUFFLER FOR PNEUMATIC HANDHELD TOOL - A muffler for mounting to a handheld pneumatic tool, such as a die grinder. The muffler comprises a hollow open-ended casing having an inner wall lined with a thick layer of an insulating material. The muffler is sleeve mounted about a coupler positioned between an exhaust end of the pneumatic tool and an air adapter supplying compressed air to the pneumatic tool for operation thereof. A plate comprising a plurality of perforations is positioned at a first face of the casing adjacent the air adapter. A biasing member is further placed between the plate and the air adapter for biasing a second face of the casing against the exhaust end. In this manner, during operation of the pneumatic tool, released air expelled at the exhaust end is directed through the casing to reduce a level of the noise at the exhaust end. | 11-18-2010 |
| 20150367491 | SILENCING DEVICE FOR PNEUMATIC TOOL - A silencing device is disposed in an exhaust channel of a pneumatic tool. The exhaust channel has an outlet and an inner surface. The silencing device includes a shell-shaped silencer made of a porous material and a silencing washer disposed between the silencer and the inner surface of the exhaust channel. The silencer includes an open end, a closed end, an annular wall located between the open end and the closed end, and a concave portion located on the inner side of the annular wall. The open end is closer to the outlet of the exhaust channel than the closed end. The annular wall extends substantially along the inner surface of the exhaust channel. Therefore, the silencing device can lead to preferable effects of noise reduction and dust prevention and apply minimal adverse effect on the driving power of the pneumatic tool. | 12-24-2015 |
| 181259000 |
With disparate fluid mingling | 5 |
| 20100206665 | MUFFLER FOR ENGINES IN OILFIELD APPLICATIONS - A muffler for an engine in oilfield applications has a tube with nozzles in its inlet section for spraying a mist of water from the well into the exhaust gases produced by the engine, so that a significant portion of the water is converted to water vapor and exits with the exhaust gases at the outlet of the tube. Vortex generators on the interior surface of the midsection of the tube create turbulence in the exhaust gases and water mist. A sump at the outlet section of the tube collects the remaining water and pollutants trapped by the water for subsequent disposal. | 08-19-2010 |
| 20090065297 | DUAL ACTION INLET DOOR AND METHOD FOR USE THEREOF - An inlet door assembly and method for reducing noise from an auxiliary power unit (APU) contained within an aircraft housing is provided. The inlet assembly includes an inlet duct, an actuator, and a door. The inlet duct is configured to extend from the auxiliary power unit to the aircraft housing and has a sidewall that defines a flow passage through which APU noise propagates. The actuator is disposed at least partially within the inlet duct. The door coupled to the actuator. The actuator is also configured to selectively rotate the door between at least a first position, in which at least a portion of the door deflects APU noise in a first direction, and a second position, in which at least a portion of the door deflects the APU noise in a second direction. | 03-12-2009 |
| 20100230205 | Muffler - A muffler for a small two-cycle engine includes: a muffler body having an expansion chamber; an exhaust-gas guide member covering an outlet for exhaust gas, the outlet being provided on the muffler body and a cover hood that covers a discharge port for exhaust gas, the discharge port being provided on the exhaust-gas guide member. A guide that guides the exhaust gas in the exhaust-gas guide member is gradually widened toward a top surface of the cover hood as proceeding to the discharge port. | 09-16-2010 |
| 20110139541 | METHOD FOR ADJUSTING A HELMHOLTZ RESONATOR AND AN ADJUSTABLE HELMHOLTZ RESONATOR - In a method for adjusting a Helmholtz resonator ( | 06-16-2011 |
| 20130277145 | MUFFLER AND ENGINE SYSTEM - A muffler for exhaust gases of a combustion engine includes walls forming a chamber through which the exhaust gases pass, a first inlet in the walls of the chamber configured to receive the exhaust gases from an exhaust duct of the engine, a first outlet in the walls of the chamber through which the exhaust gases exit the chamber, and a conduit having a second inlet and a second outlet, wherein a substantial length of the conduit is positioned within the chamber. | 10-24-2013 |
| 181225000 |
With fan to assist fluid flow | 4 |
| 20090032331 | NOISE REDUCTION WITH RESONATANCE CHAMBER - An apparatus comprises a housing comprising an air inlet, an air outlet and a divider that divides the housing into first and second air passages. The housing comprises a resonance chamber for each air passage. Each resonance chamber comprises a port, and air waves enter each such resonance chamber through such port and resonate. | 02-05-2009 |
| 20100018798 | NOISE SILENCER FOR CONSTRUCTION EQUIPMENT - A noise silencer for construction equipment is used to minimize outward propagation of noises generated from an engine room. The noise silencer is mounted in air intake and/or discharge openings of an engine room, and includes a frame mounted in the one of the air intake and discharge openings of the engine room, and noise damping members fixed to the frame at uniform intervals, and each including a first member, which is disposed inside the engine room in a horizontal direction such that cooling air introduced from outside to inside of the engine room by operation of a cooling fan smoothly flows, and a second member, which is integrally formed with the first member and is disposed outside the engine room so as to be inclined upwardly at a predetermined inclination. | 01-28-2010 |
| 20110232992 | Noise suppressor, electronic apparatus, and noise suppression characteristic control method - A noise suppression characteristics adjustment method includes adjusting noise suppression characteristics of a noise suppressor, which includes a muffler having a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting an intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate. A distance d between the reflection plate and the intake plane is set such that d| 09-29-2011 | |
| 20120132479 | BLOWER ARRANGEMENT - The invention relates to a blower arrangement for gas. The blower arrangement comprises a blower with a blower housing, at least one gas-inlet opening formed in the blower housing and gas-outlet opening, and at least one rotary-driven blower wheel arranged in the blower housing. Furthermore, the blower arrangement has at least one silencer device with at least one gas guiding element, wherein the gas-guiding element comprises a plurality of silencer openings and is designed as a gas guiding pipe. The gas guiding pipe varies its cross section along its longitudinal extension and has a wall, which is designed to be wave-like along the longitudinal extension of the gas guiding pipe. The silencer device also comprises at least one silencer chamber, which is in flow connection with the silencer openings and is arranged at least in sections laterally behind the gas guiding element. | 05-31-2012 |
| 181238000 |
Multiple distinct inlets and/or outlets | 4 |
| 20110061969 | Snap-Action Valve for Exhaust System - A muffler for an internal combustion engine exhaust system includes a housing having an inlet and outlet headers enclosing opposite ends of an outer shell. A partition divides a housing interior into first and second chambers, the first chamber having sound absorbing material positioned therein. The partition has an aperture allowing fluid communication between the first and second chambers. A through pipe extends through the inlet and outlet headers and the partition and has a plurality of perforations enabling fluid communication between the through pipe and the first chamber. A valve assembly has a valve flap positioned inside the through pipe for rotation with an axle pivotally coupled to the pipe between a closed position and an open position. The valve is positioned downstream of the pipe perforations such that all of an exhaust gas flowing through the muffler passes through the valve regardless of the valve flap position. | 03-17-2011 |
| 20120085589 | Muffler for Vehicle - A muffler for a vehicle includes a plurality of baffles fixed at a predetermined distance in a longitudinal direction of a muffler housing, an exhaust gas inflow pipe, an intermediate pipe, and a plurality of exhaust gas outflow pipes having an inlet thereof positioned in the same chamber defined by the adjacent pair of the baffles with the outlet of the intermediate pipe to considerably reduce exhaust noise, flow-induced noise, and booming noise of exhaust gas. The muffler is effectively protected from thermal damage of a vehicle by implementing a sound-absorbing heat-insulating material therein, and impresses consumers with dynamic, powerful, and polished image by making the exhaust gas outflow pipe in a dual type composed of first and second exhaust gas outflow pipes and disposing the outlet at the lower center of a rear bumper to be exposed to the outside, thereby considerably improving productivity of vehicles. | 04-12-2012 |
| 20080302597 | EXHAUST SYSTEM - An exhaust system ( | 12-11-2008 |
| 20160376930 | MUFFLER AND MUFFLING DEVICE INCLUDING THE SAME - Provided are: a muffler that can suitably obtain an attenuation effect of a sound wave; and a muffling device including the same. The muffler is installed on a wall surface of a pipe conduit where a gas flows. The muffler includes: a front surface exposed to an inner surface of the pipe conduit; a bottom surface facing the front surface; and a side surface disposed between the front surface and the bottom surface and covering a space between the front surface and the bottom surface. The front surface is formed with a plurality of through-holes, and the number of through-holes arrayed in a gas flow direction is one or two, and the number thereof arrayed in a direction orthogonal to the gas flow direction is 10 or more. | 12-29-2016 |
| 181232000 |
Separate distinct units serially connected | 3 |
| 20090127023 | PASSIVE VALVE ASSEMBLY FOR VEHICLE EXHAUST SYSTEM - An exhaust component includes at least one muffler that has an inlet and an outlet. One pipe body is connected to each of the inlet and the outlet. The pipe bodies each have first and second ends that define a respective overall pipe length. Each pipe body defines a sole exhaust flow path between their first and second ends. A passive valve assembly is mounted outside of the muffler and within one of the pipe bodies. The passive valve assembly is positioned at a location within a first 25% of the overall pipe length of one of the pipe bodies relative to the inlet or outlet of the muffler. | 05-21-2009 |
| 20090145687 | Motorcycle exhaust muffler - The exhaust muffler includes a flat box-shaped body that underlies substantially the width of the motorcycle engine and frame. The rear end of the muffler body has exhaust vents that vent the exhaust downward or laterally from the motorcycle forward of the rear wheel. An inlet neck extending from the front end of the muffle body allows convenient and direct connection of the exhaust pipes from the motor to the muffler body without numerous or complicated bends in the exhaust pipers. The low profile of the muffle body allows the exhaust muffler to be mounted beneath the motorcycle frame without significantly effecting ground clearance. | 06-11-2009 |
| 20160180829 | NOISE REDUCING DEVICE | 06-23-2016 |
| 181240000 |
Manifold type | 3 |
| 20120228054 | NOISE REDUCTION SYSTEM WITH CHAMBER - A noise reduction system with a chamber includes a chamber ( | 09-13-2012 |
| 20160130996 | Recirculating Muffler Apparatus and Method - A recirculating flow muffler apparatus and method includes a case with an exterior surrounding an interior space, the interior space forming a return area, where the case has a front and a rear. An inlet is provided at the front of the case, the inlet extending into the case interior space. A mixing tube is provided within the interior space, where the return area surrounds the mixing tube. The mixing tube has a first end and a second end where the first end is bigger than the inlet and the first end is located next to the inlet. An outlet is provided at the rear of the case, the outlet extending out of the interior space of the case and the second end of the mixing tube includes an opening between it and the outlet. | 05-12-2016 |
| 20190145300 | FASTENING DEVICE FOR A SHIELDING PART, IN PARTICULAR FOR A HEAT SHIELD, AND SHIELDING PART HAVING AT LEAST ONE FASTENING DEVICE | 05-16-2019 |
| 181236000 |
With muffler cut-out | 2 |
| 20100294589 | SNAP ACTION VALVE WITH INERTIA DAMPER - Snap action valve assemblies for use in conduits of automotive exhaust systems have their operation controlled by use of inertia damper elements coupled to an axle of a rotatable valve plate of the valve assembly. | 11-25-2010 |
| 20140158462 | VARIABLE VALVE FOR EXHAUST PIPE - A variable valve for an exhaust pipe that includes a housing disposed within an exhaust line and a partition that is fixed within the housing and divides the inside of the housing into a first exhaust gas channel and a second exhaust gas channel. A gate is disposed within the housing to selectively open and close the second exhaust gas channel and a leaf spring connects the partition with the gate and opens and closes the gate using pressure of an exhaust gas. | 06-12-2014 |
| 181231000 |
With solid particle separator (e.g., spark arrestor, vacuum cleaner, etc.) | 2 |
| 20110088967 | MOTORCYCLE - A motorcycle includes a spark arrester having an increased surface area without any undue increase in the length of a silencer or the width of the motorcycle. The motorcycle includes a rear wheel and a silencer provided on a side of the rear wheel. The silencer includes an outer tube and a spark arrester which is tubular and is disposed inside the outer tube, the longitudinal axis of the spark arrester being oriented in a longitudinal direction of the outer tube. In a sectional plane which is perpendicular or substantially perpendicular to the longitudinal direction of the outer tube and the spark arrester, the outer tube has an outside dimension in a height direction greater than an outside dimension of the outer tube in a lateral direction, and the spark arrester has an outside dimension in the height direction greater than an outside dimension of the spark arrester in the lateral direction. | 04-21-2011 |
| 20140360808 | SPARK ARRESTOR, MUFFLER, AND STRADDLE TYPE VEHICLE - A spark arrestor mounted on a muffler connected to an exhaust pipe of an engine includes a cylindrical portion including an opening that extends therethrough from the outside to the inside thereof, two cap members that respectively close first and second ends of the cylindrical portion, a mesh portion that covers the opening, and a tail pipe extending from the inside to the outside of the cylindrical portion through the cap member, wherein the exhaust flows outside the cylindrical portion in a first direction, and a channel where the exhaust flows in a second direction opposite to the first direction is provided inside the cylindrical portion. | 12-11-2014 |
| 181243000 |
With repair, replacement, or quick disassembly | 1 |
| 20090200105 | SILENCER APPARATUS WITH DISPOSABLE SILENCER CARTRIDGE UNIT - A silencer apparatus for attenuating noise in gas flow systems. The apparatus generally includes a housing having an interior cavity and a gas flow inlet and outlet that are adapted to be connected to a passage such that a gas flowing through the passage enters and exits the cavity of the housing through the inlet and outlet, respectively. A silencer cartridge unit is removably disposed within the interior cavity of the housing and defines a gas flow path fluidically connected to the inlet and outlet of the housing. The silencer cartridge unit has at least one sound-attenuating element that surrounds the gas flow path. The housing is further equipped with a closure that sealingly closes a portion of the housing, and is releasable from the housing to provide an access opening through which the silencer cartridge unit can be removed. The apparatus can also be adapted to include a filtration medium. | 08-13-2009 |
| 181242000 |
Mouthpiece (e.g., telephone, microphone, etc.) | 1 |
| 20180027316 | MICROPHONE COVER/REFLECTOR | 01-25-2018 |
| 181237000 |
With pressure relief safety valve | 1 |
| 20100170743 | HIGH-PERFORMANCE MUFFLER ASSEMBLY WITH MULTIPLE MODES OF OPERATION - A high-performance muffler assembly for exhaust system of an internal combustion engine. The muffler assembly comprises an elongated casing having an inlet port and an exit port, a first pipe disposed within the casing and having an inlet end in fluid communication with the inlet port and an outlet end selectively fluidly connected to the exit port of the casing, and a first valve mounted within the casing. The first valve is selectively movable between a closed position and an open position for regulating an exhaust gas flow through the first pipe. The muffler assembly is operable in a number of different modes of operation including a high-performance mode, an exhaust braking mode, a reverse-flow mode, etc., determined by the positions of the first valve of the muffler assembly. | 07-08-2010 |
| 181244000 |
Corrosion prevention | 1 |
| 20150060192 | EXHAUST SYSTEM HAVING A SYSTEM FOR REMOVING CONDENSATE - An exhaust system, for a vehicle driven by an internal combustion engine, has a system for removing condensate ( | 03-05-2015 |
| Entries |
| Document | Title | Date |
|---|
| 20080196969 | Vehicle Exhaust Muffler - A vehicle muffler, which is structured in a coiled fashion, has a tube extending through the circumferential wall. This tube is welded to the circumferential wall and fastened by mechanical deformation to a support wall of an inner insert piece. | 08-21-2008 |
| 20080271943 | Acoustic Muffler for a Hermetic Compressor - Acoustic muffler for a hermetic compressor, comprising: a hollow base; a cover to be coupled to the hollow base, said parts of hollow base and cover including respective peripheral flanges to be mutually seated according to a seating plane; and a retention means, attaching the hollow base to the cover at the junction of said peripheral flanges, each peripheral flange presenting a respective seating surface provided with at least one recess and one rib radially adjacent and which are shaped to respectively complement one rib and one recess of the seating surface of the other peripheral flange, each rib and recess being continuous and provided to define a locking between the parts of hollow base and cover against relative spacing apart movements in said seating plane, and to define continuous sealing radial labyrinths between the interior and the exterior of the acoustic muffler, at the junction of said peripheral flanges. | 11-06-2008 |
| 20080302596 | Diaphragm Muffler and Method of Use - A diaphragm muffler for quiet operation of a compressor imparting an above atmospheric pressure stream and a below atmospheric pressure stream. The diaphragm muffler including a diaphragm pressure chamber receiving the above atmospheric pressure stream; a diaphragm vacuum chamber receiving the below atmospheric pressure stream; and a flexible diaphragm dividing the diaphragm pressure chamber receiving the above atmospheric pressure stream from the diaphragm vacuum chamber receiving the below atmospheric pressure stream, whereby the above atmospheric pressure stream and the below atmospheric pressure stream cancel each other out via the flexible diaphragm. | 12-11-2008 |
| 20090000862 | MOTORCYCLE EXHAUST SYSTEM - An exhaust system for a motorcycle engine includes a muffler assembly. The muffler assembly includes a downstream attenuation portion adapted to be positioned substantially rearward of the motorcycle engine and having a first height, an upstream portion adapted to be positioned substantially forward of the motorcycle engine and having a second height, and an intermediate attenuation portion between the upstream portion and the downstream attenuation portion. The intermediate attenuation portion is adapted to be positioned substantially below the motorcycle engine and has a third height less than half the first height. In some embodiments, a motorcycle is provided, in which the motorcycle engine is positioned substantially within a recess of the muffler assembly to a depth greater than the third height. | 01-01-2009 |
| 20090166125 | ACOUSTIC LOAD MITIGATOR - A system for reducing an acoustic load of a fluid flow includes a first pipe to carry the fluid flow; a standpipe connected to the first pipe at an opening in the first pipe; and a standpipe flow tripper provided in the standpipe. The flow tripper includes an edge extending through the opening into the flow on a downstream side of the opening. A method of reducing an acoustic load of a standing wave in a standpipe connected to a first pipe configured to carry a flow includes disrupting the flow in the first pipe at a downstream side of an opening in the first pipe to which the standpipe is connected. | 07-02-2009 |
| 20090294210 | Exhaust-gas muffler - An exhaust-gas muffler ( | 12-03-2009 |
| 20090321180 | Roof-mounted muffler for system for generating electric power - An exhaust system for an electric power generation system is disclosed. The exhaust system may include a muffler configured to suppress noise associated with operation of an engine associated with the electric power generation system. The muffler may be configured to be mounted in a roof of a housing configured to contain at least part of the electric power generation system. The muffler may be configured to form an outside surface of the roof. Removal of the engine from the housing may be facilitated by removal of the muffler from the roof, such that the engine can be lifted out of the housing. | 12-31-2009 |
| 20100219013 | Silencing Arrangement - In an appliance, such as a cyclonic vacuum cleaner, a motor is arranged to drive an impeller fan located in a motor and fan unit. The rotation of the impeller may cause nuisance tones to be generated. A silencing arrangement is provided to control such noise and includes a plurality of discrete passive silencers in the form of tube silencers arranged in a first set and a second set. The tube silencers have open end portions arranged to face the fan and the silencers of the first set are spaced from the silencers of the second set in both axial and radial directions. This combination gives the same effect as an array of closely spaced tube silencers—however, by spacing the silencers in two directions, fluid is allowed to flow freely. | 09-02-2010 |
| 20110005857 | EXHAUST SYSTEM AND CORRESPONDING CONNECTION DEVICE FOR AN ACTUATOR - A connection device ( | 01-13-2011 |
| 20110024227 | VEHICLE SILENCER - A silencer for an exhaust system, more preferably of a motor vehicle, is provided with a silencer insert arranged in a silencer housing. The silencer includes a jacket, with at least one pipe section penetrating a through-opening of the jacket. Through welding of the pipe section to the silencer insert a weld seam formed pressure-tight between pipe section and jacket is relieved of mechanical load. | 02-03-2011 |
| 20110031063 | SILENCER FOR MOTOR VEHICLE EXHAUST LINE - This silencer ( | 02-10-2011 |
| 20110127105 | MUFFLER FOR VEHICLE - A muffler apparatus for a vehicle may include a speaker chamber that produces sound while vibrating by pressure of an exhaust gas flowing into a muffler housing, wherein the speaker chamber is formed in the muffler housing, the pressure of the exhaust gas being greater than a predetermined value. | 06-02-2011 |
| 20120024620 | SILENCER DEVICE FOR A HAIR DRYER - A silencer device for a hair dryer comprises a container structure ( | 02-02-2012 |
| 20120024621 | PERFORATION ACOUSTIC MUFFLER ASSEMBLY AND METHOD OF REDUCING NOISE TRANSMISSION THROUGH OBJECTS - A noise attenuation system is disclosed for use in a structure having a recessed fixture mounted therein or other unit which creates a hole in the structure in which it is secured, such as a ceiling. The noise attenuation system is constructed to permit the absorption of noise emitted into the structure from the mechanism. The noise attenuation includes a noise absorbing muffler positioned within the structure in an area substantially surrounding the mechanism. The noise absorbing layer includes an outer barrier layer that limits the passage of sound waves emitted from the mechanism therethrough. The noise absorbing muffler further includes a noise absorbing layer positioned adjacent the outer barrier layer. The noise absorbing layer absorbs a predetermined amount of sounds waves emitted from the recessed fixture. Additionally, an optional noise absorbing layer, or equivalent decoupling material can be included to decouple the barrier from the structure for low frequency noises. | 02-02-2012 |
| 20120055733 | Fluid Transfer Pipe and Fluid Transfer Apparatus and a Fluid Attenuator and Attenuator Apparatus - A fluid transfer pipe ( | 03-08-2012 |
| 20120132478 | MUFFLER - A muffler ( | 05-31-2012 |
| 20120138382 | Housing - The present invention relates to a housing ( | 06-07-2012 |
| 20120267189 | MUFFLER - A muffler ( | 10-25-2012 |
| 20120312629 | EXPANDABLE CHAMBER ACOUSTIC SILENCER - The expandable chamber acoustic silencer may be installed at the inlet or outlet of virtually any mechanism that processes air or other gas flow therethrough, to reduce the audible output of the gas flow. The silencer may be used to reduce the noise produced in an air conditioning system, in the inlet or outlet side of an air compressor, or as a muffler for an internal combustion engine, among other applications. The device includes an expansion chamber having adjustable walls driven by actuators installed within the walls to adjust the cross-sectional area of the chamber, with a portion of the walls being formed of a flexible or resilient material to enable such expansion and retraction. One or more microphones are installed at the outlet and/or inlet ends of the silencer and communicate with a controller that operates the actuators in accordance with a predetermined algorithm. | 12-13-2012 |
| 20130020146 | SOUND INSULATION IN A REFRIGERANT CIRCUIT - A muffler device for a refrigerant circuit with refrigerant containing refrigerant oil comprises a housing in which an upper muffler chamber and a lower muffler chamber are arranged, whereby the upper muffler chamber has an upper feed opening that can be connected to the refrigerant circuit, and the lower muffler chamber has a lower discharge opening that can be connected to the refrigerant circuit, and whereby a muffler partition is arranged between the upper and lower muffler chambers, said partition having at least one muffling pipe that connects the upper muffler chamber to the lower muffler chamber, and an upper section of said pipe with an upper opening projects into the upper muffler chamber, whereby, at a filling level that exceeds the height of the upper opening, refrigerant oil that has accumulated on the top of the muffler partition can be fed with refrigerant vapor to the lower muffler chamber. | 01-24-2013 |
| 20130056298 | EXHAUST GAS MUFFLER FOR INTERNAL COMBUSTION ENGINES AND DEEP DRAWING TOOL THEREFOR - A shell muffler for an internal combustion engine that is formed of a first shell and at least one second shell, which shells are connected at their respective edge regions B | 03-07-2013 |
| 20130140107 | MUFFLER INCLUDING A RESONATOR SLIDE-IN UNIT - A muffler for an intake tract of a combustion engine is provided. The muffler includes a resonator housing, which according to a part segment of an annular body is formed with continuous cross section. The muffler also includes a resonator slide-in unit, which according to a part segment of an annular body is formed with a continuous cross section and which is configured in order to be slid into the resonator housing in a part circle-like movement. | 06-06-2013 |
| 20130213732 | FLUID LINE HAVING A RESONATOR - A fluid line includes a resonator having an inner part and a blow-molded outer part defining an inner surface. The inner and outer parts are fixedly connected. The inner part is an injection-molded part having first and second radial collars spaced axially apart from each other. The inner part defines a radial circumference with a plurality of orifices formed therein. The inner and outer parts are axially one within the other so that there is no throughflow of secondary air between the first and second radial collars and the inner surface of the outer part. The inner and outer parts have a common end whereat they are airtightly connected to each other. The inner part, the radial collars and the inner surface of the outer part conjointly define two resonant chambers operatively connected to fluid in the fluid line via the orifices. | 08-22-2013 |
| 20130277142 | HIGH PRESSURE MUFFLING DEVICES - Some example muffling devices may include an inner flow conditioner shaped as a generally conical frustrum and a generally cylindrical an exhaust can around the inner flow conditioner. A ratio of a downstream end wall area of the inner flow conditioner to a downstream end annular area between the downstream end wall and the exhaust can may be about 0.12 to about 0.97. A ratio of the downstream end annular area to the downstream end wall area may be proportional, by a factor of about 0.8 to about 1.9, to a ratio of an effective area of the inner flow conditioner sidewall holes to an effective area of the inner flow conditioner downstream end wall holes. A ratio of a dissipation distance between the inner flow conditioner downstream end wall and the exhaust screen to the inner flow conditioner downstream end wall hole diameter may be greater than about 10. | 10-24-2013 |
| 20140054106 | MUFFLER INSERT FOR MOTOR VEHICLES AND METHOD FOR PRODUCING SAME - A first aspect of the present application relates to a method for producing sound-damping, sound-absorbing and/or insulating molded material. More specifically, the method according to the invention relates to a method for producing said molded materials, wherein the fibrous material is wound around at least two carriers and subsequently the wound blank thus obtained remains on the carriers so as to be permanently solidified in order to obtain the molded material according to the invention. A further aspect of the present application concerns the molded material thus obtained, in particular in the form of molded mats or molded objects. Said molded material can be used, in particular, in mufflers. Finally, the following application concerns a device for producing said molded materials from fibrous material. | 02-27-2014 |
| 20140231167 | MUFFLER - A muffler having a shell of a double-layer structure includes an inner shell that is formed by fixing ends of a tubularly rolled plate material to each other through a lock seam, and an outer shell that is formed substantially in the same manner as the inner shell. In this muffler, a through-hole is provided through the inner shell at a position where the inner shell overlaps with a lock seam portion of the outer shell. | 08-21-2014 |
| 20140299404 | ACOUSTIC DISPERSING AIRFLOW PASSAGE - A plenum with features to disperse acoustic energy in an airflow while maintaining a relatively small pressure drop in the airflow is disclosed. A general structure of the plenum may include a perforated airflow passage surrounded by a substantially large space enclosed between the airflow passage and a plenum. The perforated airflow passage has a perforated wall that may allow the acoustic energy to be dispersed into the substantially large space when flowing through the airflow passage. Acoustic energy dispersing materials may also be disposed in the substantially large space and/or on the perforated wall to help disperse acoustic energy by, for example, absorbing the acoustic energy. The plenum can help disperse the acoustic energy while helping minimize the pressure drop in the airflow. | 10-09-2014 |
| 20140345968 | ACOUSTIC FILTER SUITABLE FOR RECIPROCATING COMPRESSOR - The present invention refers to an acoustic filter for reciprocating compressor and, in special, a suction acoustic filter containing at least one inlet pipeline ( | 11-27-2014 |
| 20150083520 | Underwater Noise Abatement Panel and Resonator Structure - A system for reducing noise emissions in underwater environments is presented. The system can be extended to applications in any two-fluid environments where one fluid (gas) is contained in an enclosed resonator volume connected to the outside environment at an open end of the resonator body. The resonators act as gas-containing (e.g., air) Helmholtz resonators constructed into solid panels that are submerged in the fluid medium (e.g., sea water) in the vicinity of a noise generating source. The oscillations of the trapped air volume in the resonators causes reduction of certain noise energy and a general reduction in the transmitted noise in the environment of the system. | 03-26-2015 |
| 20150122576 | SILENCER DUCT FOR SHIP'S PROPELLER USING RESONANT BARRELS - The present invention relates to a silencer duct for a ship's propeller using resonant barrels, wherein the ship's propeller is surrounded by the silencer duct so as to deaden underwater noises of various frequencies generated by the propeller, the duct being made into a cylindrical form to surround the propeller arranged in the side or rear part of the ship so as to guide the fluid direction as the propeller rotates, and the inside of the duct being provided with a plurality of resonant barrels for damping resonant frequencies arranged in the form of n×m (herein, n and m are natural numbers except 0) so as to damp the sound waves generated by the rotation of the propeller. | 05-07-2015 |
| 20150129353 | Silencer System For A Vacuum Motor In A Suction Cleaner - The present invention relates to a silencer system for a vacuum motor in a suction cleaner, which may be constructed using only one or two parts to form a housing for the vacuum motor including the silencer system. The system may have a main fan silencer system for the main fan and a second motor cooling silencer system for the motor cooling fan. The main fan is encapsulated in a housing surrounded by a substantially circular first wall part in such a way that a first cavity is formed between the housing and the first wall part. The system further includes two ducts, each duct connected at one end with a serpentine shaped exhaust air duct and at the other end with a second cavity connected with the first cavity by an opening in the first wall part. | 05-14-2015 |
| 20160017788 | STACKABLE MUFFLER SHELL - An exhaust system component includes stacking features that prevents binding among adjacent components in a stack. The stacking features are arranged along a shell of the exhaust system component, such as along a sidewall extending from a panel of the shell. The stacking features can be arranged to define a gap between opposing surfaces of stacked shells. The stacking features can be in the form of indentations and can be formed in curved portions of the sidewall to conserve material thickness, which can be critical in exhaust system applications. The stacking features can result in a stack of components with uniform spacing among the components of the stack. | 01-21-2016 |
| 20160053664 | MUFFLER AND ITS CORRESPONDING MANUFACTURING METHOD - A manufacturing method for a muffler includes: a trimming step, of cutting out a dogleg shaped muffler body member; a bending processing step of processing the muffler body member into a tube by advancing the muffler body member between an upper roller and a lower roller of a bending machine while adjusting an advancing direction with a guide and by changing a relative position of the upper roller and the lower roller; a first joining step of joining two ends of the tubularly-processed muffler body member in a long side direction; an insertion step of inserting an inner structural member into the inside of the tubularly-processed muffler body member; a second joining step of joining caps to opening portions of the tubularly-processed muffler body member; and a third joining step of joining an air intake joint and an exhaust pipe to the sealed muffler body member. | 02-25-2016 |
| 20160146087 | MUFFLER SHIELD AND MUFFLER ASSEMBLY EMPLOYING THE SAME - In one or more embodiments, a muffler shield includes a shield body extending in a longitudinal direction and defining a middle portion positioned between first and second side portions along a transverse direction, a cross-section of the middle portion and at least one of the first and second side portions respectively defining a middle profile and a side profile shorter than the middle profile. | 05-26-2016 |
