| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 181264000 |
With baffle or baffle structure
| 52 |
| 181247000 |
Straight-through passage
| 44 |
| 181213000 |
Reaction engine type
| 43 |
| 181228000 |
With exhaust pipe
| 37 |
| 181224000 |
Sound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type)
| 33 |
| 181229000 |
Carburetor, burner, or compressor intake silencer
| 23 |
| 181256000 |
With sound absorbing material
| 18 |
| 181223000 |
Silencer for firearms
| 17 |
| 181227000 |
Pipe-muffler (e.g., tail pipe type)
| 17 |
| 181233000 |
Liquid motion silencer
| 8 |
| 181241000 |
Adjustable muffler (i.e., internal or external parts) | 5 |
| 20090107760 | EXHAUST SYSTEM AND MUFFLER WITH REVERSIBLE END-CAPS - An exhaust system is provided with a muffler with reversible end-caps, which allow a tailpipe to be switched over from one side of the muffler to the other before or after it is attached to an engine and mounted on an application. | 04-30-2009 |
| 20110214937 | REMOVABLE EXHAUST BAFFLE - A selectively removable exhaust baffle which can be placed within an exhaust pipe to muffle the emitted sound. The removable baffle preferably includes a frame having a pair of legs joined by a spring portion. One or more transverse occluding plates are mounted on the frame. The frame is sized so that when it is pushed into the exhaust pipe it must be compressed. This compression holds the frame in place. The transverse occluding plate or plates lie against the interior wall of the exhaust pipe. The gas flow must therefore pass around the plate or plates, thereby attenuating the sound. | 09-08-2011 |
| 20090211841 | Exhaust System for Internal Combustion Engine Having Temperature Variable Acoustics - A muffler for an internal combustion engine featuring two flowpaths for exhaust through the muffler. A first serpentine pathway is substantially longer than a second pathway through the muffler, thereby providing increased sound attenuation. Temperature activated internal valves operate to change the exhaust flowpath from the first flowpath to the second flowpath through the muffler as exhaust gasses warm the muffler and the temperature actuated valves. | 08-27-2009 |
| 20090229911 | VARIABLE GEOMETRY MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A variable geometry muffler for an exhaust system of an internal combustion engine; the muffler displays: a tubular body, which displays an inlet opening, an outlet opening and a labyrinth which determines a path for the exhaust gases from the inlet opening to the outlet opening; and a bypass valve, which is arranged within the tubular body to modify the geometry of the labyrinth according to the exhaust gas pressure; the bypass valve displays a lid, which is coupled to a bypass opening and is mobile from a closed position of the bypass opening to an opening position of the bypass opening by effect of the exhaust gas pressure and against the bias of an elastic body which tends to maintain the lid in the closed position; the elastic body consists of an elastic foil, which is folded as a “U” and displays a mobile end which supports the lid and a fixed end which is opposite to the mobile end and which is integral with a fixed part of the muffler. | 09-17-2009 |
| 20080314679 | Variable Sound Muffler System - A muffler system includes a housing having two pipes perforated with holes or other shapes that slide or rotate on top of each other. The sliding or rotating pipes allow for varying degrees of alignment of the holes and thereby allow more or less sound dampening. The control of the sound dampening is actuated by an operator via an electric switch that activates at least one of the pipes inside the muffler system to rotate or slide on each other thereby aligning the holes. | 12-25-2008 |
| 181259000 |
With disparate fluid mingling | 4 |
| 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 |
| 20110139541 | METHOD FOR ADJUSTING A HELMHOLTZ RESONATOR AND AN ADJUSTABLE HELMHOLTZ RESONATOR - In a method for adjusting a Helmholtz resonator ( | 06-16-2011 |
| 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 |
| 181230000 |
Pneumatic type motor (e.g., air hammer, etc.) | 4 |
| 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 |
| 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 |
| 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 |
| 181225000 |
With fan to assist fluid flow | 4 |
| 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 | |
| 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 |
| 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 |
| 181226000 |
With adjustable fluid flow | 4 |
| 20090084626 | Muffler and Working Machine - A muffler of a work machine in the form of an engine blower includes: a muffler body; and a diffuser that covers an exhaust outlet of exhaust gas provided on the muffler body. The diffuser has a diffusion space to diffuse the exhaust gas and an exhaust surface on which a plurality of exhaust circular holes are provided to exhaust the exhaust gas to an outside. An opening ratio provided by the exhaust holes of the exhaust surface is gradually increased from a portion corresponding to the exhaust opening toward an outer periphery of the exhaust surface. | 04-02-2009 |
| 20100276226 | MUFFLER - A muffler is disclosed. In the muffler a throttling device that is controlled by the energy of the airflow to be muffled is provided in a pipeline of the airflow that needs to be muffled. The muffler is adjusted by itself according to random variety of the pulsing airflow, and can eliminate or reduce effectively the pulsation of the airflow and the related noise in the range of the low frequency and the middle frequency. The muffling effect of the muffler has no correlation with the volume of the muffler, and therefore the volume of the muffler can be reduced. | 11-04-2010 |
| 20110168483 | BLUFF BODY NOISE CONTROL - The present invention provides a method of and apparatus for, reducing noise caused by the interaction of airflow between two bluff bodies which are in a generally tandem arrangement, the method comprising providing flow control such that the peak turbulence is at least partially displaced from, or reduced at, the surface of the downstream body. The invention also provides an aircraft noise reduction device, and a method of using such a device, comprising a flow control apparatus ( | 07-14-2011 |
| 20120055734 | EXHAUST FLOW CONTROL DEVICE FOR EXHAUST MUFFLER - An exhaust flow control valve includes: a valve plate hinged to a downstream exhaust pipe to be pivotable, inside the pipe, between a fully closed position where a short-cut hole is closed and a fully open position where the short-cut hole is opened, the valve plate having a tip end directed toward a downstream side of the downstream exhaust pipe when at the fully open position; a spring receiving member provided to the downstream exhaust pipe to traverse the short-cut hole; and a valve spring having one end portion fastened to a tip end portion, which is located on the downstream side of the downstream exhaust pipe with respect to the spring receiving member, of the valve plate, and having an opposite end side being slidably in pressure contact with the spring receiving member, thereby generating a repulsive force to bias the valve plate toward the fully closed position. | 03-08-2012 |
| 181235000 |
Underwater discharge | 4 |
| 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 |
| 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 |
| 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 |
| 181238000 |
Multiple distinct inlets and/or outlets | 3 |
| 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 |
| 181232000 |
Separate distinct units serially connected | 2 |
| 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 |
| 181240000 |
Manifold type | 1 |
| 20120228054 | NOISE REDUCTION SYSTEM WITH CHAMBER - A noise reduction system with a chamber includes a chamber ( | 09-13-2012 |
| 181236000 |
With muffler cut-out | 1 |
| 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 |
| 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 |
| 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 |
| 181231000 |
With solid particle separator (e.g., spark arrestor, vacuum cleaner, etc.) | 1 |
| 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 |
| Entries |
| Document | Title | Date |
|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 20120024620 | SILENCER DEVICE FOR A HAIR DRYER - A silencer device for a hair dryer comprises a container structure ( | 02-02-2012 |
| 20090294210 | Exhaust-gas muffler - An exhaust-gas muffler ( | 12-03-2009 |
| 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 |
| 20110005857 | EXHAUST SYSTEM AND CORRESPONDING CONNECTION DEVICE FOR AN ACTUATOR - A connection device ( | 01-13-2011 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 20120055733 | Fluid Transfer Pipe and Fluid Transfer Apparatus and a Fluid Attenuator and Attenuator Apparatus - A fluid transfer pipe ( | 03-08-2012 |
| 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 |
| 20120132478 | MUFFLER - A muffler ( | 05-31-2012 |
| 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 |
| 20120138382 | Housing - The present invention relates to a housing ( | 06-07-2012 |
| 20120267189 | MUFFLER - A muffler ( | 10-25-2012 |
| 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 |
