Abstract: A lock seam for joining a first edge of material to a second edge of material is described. The first edge is wrapped in a first curl such that the first curl is substantially circular in shape. The second edge is wrapped in a second curl which is also substantially circular in shape. The inside surface of the first curl is wrapped about the outer surface of the second curl. The lock seam formed by this manner is particularly advantageous for muffler assembly.

Abstract: An exhaust muffler for a fuel-operated heating device has upper and lower housing half shells, an exhaust gas through-duct and absorption and reflection chambers. The exhaust muffler is connectable to an exhaust pipe of the heating device. The exhaust gas through-duct has an inlet pipe of a single absorption chamber and a single following reflection chamber that are separated by a partially perforated partition, with double reversal of the exhaust gas flow, and an outlet pipe; the inlet pipe being perforated on the outer surface side, with an S-shaped curved section and a straight end section, and the outlet pipe being a straight outlet pipe, closed on the outer surface side, and the straight section of the inlet pipe runs parallel to, and at a spacing from, an inlet section of the outlet pipe.

Abstract: A method for manufacturing intake mufflers, particularly for compression circuits for refrigeration systems and the like, comprising the steps of: molding a cover and a base of an intake muffler; and mutually assembling the base and the cover in a mold inside which a perimetric profile is formed which is adapted to form a retention joint which is molded perimetrically at the edge where the base and the cover are mutually coupled.

Abstract: To provide a muffler structure capable of lowering muffler cost. A muffler structure is provided in which a sound absorbing material is laid on the inside surface of an outer tube. The sound absorbing material is retained by an inner tube made of a metal that is punched with a plurality of holes. The inner tube is divided into a plurality of expansion chambers. Exhaust gas from an engine is led into the fiat expansion chamber by an inlet pipe. The exhaust gas is discharged out after being supplied to the second and third expansion chambers in succession through the connecting pipes. In the muffler structure, the inner tube is made of an approximately flat metal that is punched with a plurality of holes by bending the metal into circular form until its opposite edges are butted to each other, and is fitted in the outer tube, with the butt portions not jointed, so that the butt portions will come behind the connecting pipe when viewed from the inlet pipe side.

Abstract: Disclosed herein is a silencer for reducing acoustic energy in a flow of exhaust gas from a combustion power source which prevents rain or snow from entering an exhaust stack without the need for a weather cap or hood. The silencer achieves acoustic energy attenuation and precipitation diversion with a minimal increase in backpressure. The silencer comprises a chamber at least partially defined by a chamber wall in communication with an inlet port for introducing exhaust gas into the chamber and an exhaust port for exiting exhaust gases from the chamber. The inlet port may be in communication with an inlet collar for attachment to an exhaust stack. A housing at least partially surrounds the chamber wall to form at least one cavity between the chamber wall and the housing where acoustic absorbing material is disposed. A deflector is at least partially disposed within the chamber having a gallery portion in communication with the channel.

Abstract: A high performance muffler is used to modify sound waves of exhaust gases generated by a high performance internal combustion engine. The muffler has an inlet for connection to an internal combustion engine exhaust system. A muffler body is connected to the inlet. The muffler body has a shell which has a width greater than its height. The shell includes a pair of spaced apart opposed panels. An outlet is connected to the muffler body to receive exhaust gases from the body. The muffler body has a first expansion chamber adjacent to the inlet. The first expansion chamber extends across the width of the muffler body. A first reduced opening is in the muffler body extending across the width of the muffler body. A second expansion chamber is in the muffler body adjacent to the first reduced opening. The second expansion chamber also extends across the width of the muffler body. A second reduced opening extending across the width of the muffler body communicates with the second expansion chamber.

Abstract: A muffler including an internal assembly formed of a pair of identical stampings. The internal assembly includes three tubes extending longitudinally between baffles. The internal assembly received within the muffler outer shell forms central upper and lower attenuation chambers as well as chambers at each proximal end of the muffler. The stampings are provided with impressions for forming weep holes and allowing acidic condensation to exit the central chambers. The stampings are located in mirror image relation with one another and are attached to one another by a rivet pattern and using the metal of the stampings. The rivets readily allow acidic condensate to flow between the upper and lower central chambers. Louver-shaped openings are provided on the stampings providing communication between the formed tubes and the upper and lower central chambers and thereby providing attenuation.

Abstract: The invention relates to a silencer. The silencer includes a sound conducting channel having two ends. An injection molded part is arranged between the two ends of the sound conducting channel and includes a plurality of pipe elements. A shunt resonator is arranged in fluid communication with the sound conducting channel by way of openings formed in the plurality of pipe elements. The shunt resonator defines a volume formed by two housing parts which are joined together. By varying the number, position, length and diameter of the pipe elements in the silencer, the silencer is capable of achieving silencing gains in different frequency ranges.

Abstract: A silencer assembly having a cylindrical chamber having a closed cylindrical outer wall, a first end wall and a second end wall, the first end wall having an inlet therein, and the second end wall having an outlet therein, an internal annular chamber proximate the cylindrical outer wall, the internal annular chamber bounded by the cylindrical outer wall and by a perforated cylindrical inner wall, the internal annular chamber containing single strand fiberglass acoustic fill material, the internal annular chamber having no internal barriers therein, and, a perforated generally cylindrically shaped core located inside of the cylindrical chamber positioned in spaced relation to the internal annular chamber and also in spaced relation to the inlet and outlet, creating a generally annular shaped passageway for exhaust gas, the core containing single strand fiberglass acoustic fill material.

Abstract: A space efficient, structurally rigid, integrated muffler and bumper assembly is provided. The muffler and bumper assembly comprises an extruded skeleton, an energy absorbing bumper, and a bumper fascia. The extruded skeleton is formed such that internal cavities or passage flow chambers exist. In turn, the walls of the flow chambers maintain a plurality of holes, allowing for passage of exhaust gases between chambers. The extruded skeleton also has an inlet and outlet for exhaust gas flow. Arms having tabs on the ends thereof extend from the top and bottom of the extruded skeleton such that the energy absorbing bumper, which maintains recesses in the top and bottom portions, snap-fits with the extruded skeleton. The extruded skeleton/bumper assembly is welded or otherwise mechanically fastened to the vehicle frame rails. The bumper fascia is introduced over the extruded skeleton/bumper assembly generally masking the assembly with the overall vehicle design.

Abstract: A time warp method of reducing noise in an exhaust stream includes the step of directing the exhaust stream into an inlet aperture of a sound cancellation chamber. The method also includes reflecting sound in the sound cancellation chamber toward the inlet aperture of the sound cancellation chamber. Another step of the method includes spreading the exhaust stream radially toward a periphery of the sound cancellation chamber. Yet another step of the method includes collecting exhaust from the periphery of the sound cancellation chamber in an outlet collector ring. Moreover, the method includes directing the exhaust collected from the periphery of the sound cancellation chamber substantially circumferentially about the sound cancellation chamber toward an outlet aperture of the outlet collector ring. Muffler devices for implementing the method are also disclosed.

Abstract: Compactness is enhanced while retaining the performance, noise deadening characteristic and engine output. The ratio of the distance, a, from a gas outlet end, p, of an exhaust pipe to an inner wall of a rear partition wall to an inside diameter ∅A of the exhaust pipe is set in a relation of 0.6≦(a/∅A)<1.2, while the ratio of the distance, b, from a gas inlet end, q, of a tail pipe to an inner wall of a front partition wall to an inside diameter ∅B of the tail pipe is set in a relation of 0.4≦(b/∅B)<1.2, to afford a silencer having an optimum combination of engine output characteristic and compactness while retaining a noise deadening effect.

Abstract: A muffler includes an outer shell defining a chamber and a pair of inner plates positioned in the chamber. Each inner plate includes first and second folds partitioning each of the inner plates into a base portion, a first baffle portion, and a second baffle portion. The base portions cooperate to define a first baffle. The first baffle portions cooperate to define a second baffle and the second baffle portions cooperates to define a third baffle. The first, second, and third baffles partition the chamber defined by the outer shell into subchambers. The first baffle includes a tube and each of the second and third baffles include a tube-receiving aperture sized to receive the tube of the first baffle.

Abstract: A muffler includes an upstream outer shell, a downstream outer shell, and identical upstream and downstream inner baffles forming in combination an upstream expansion chamber, an inner expansion chamber, and a downstream expansion chamber. The upstream and downstream inner baffles divide the inner expansion chamber therebetween into a main chamber and first and second laterally spaced subchambers. The upstream and downstream inner baffles have respective sets of apertures therethrough laterally offset from each other and aligned with respective subchambers and communicating exhaust from the upstream expansion chamber through the set of apertures in the upstream inner baffle into the first subchamber and then flowing laterally through the main chamber to the second subchamber and then flowing through the second set of apertures into the downstream expansion chamber.

Abstract: In order to create a process for producing muffler inserts as well as novel muffler inserts, which are most optimally adaptable in size and shape to the interior space of the muffler housing to be filled, by simple means, and which also can be produced economically and have improved effect, a process is proposed for producing muffler inserts which operate entirely or partially according to the absorption principle, whereby a predetermined amount of a loose bundle of individual elements of a suitable sound-absorbing material is formed, the loose bundle is shaped roughly in an assembly shaping unit corresponding to the intended shape of the muffler insert, and whereby the loose bundle is fixed into a shaped composite in the shape corresponding to the assembly shaping unit, in such a way that the fixed shape can be handled without individual elements loosening until assembly for the specified uses of the muffler insert; however during the specific use as a muffler insert the fixing is at least partially released

Abstract: More than two damping chambers 2A to 2C), a communicating pipe (6) for intercommunicating the damping chambers (2A, 2B) and another communicating pipe (7) for intercommunicating the damping chambers (2B, 2C) are provided. Both ends of the communicating pipes (6, 7) are closed by an end plate (9) and the respective damping chambers (2A to 2C) and inside of the communicating pipes (6, 7) are intercommunicated by communicating holes (8A) on an outer circumference of the communicating pipes (6, 7). Exhaust gas flows from the damping chamber (2A) to communicating holes (8A1), inside of the communicating pipe (6), communicating holes (8A2), the damping chamber (2B), communicating holes (8A3), inside of the communicating pipe (7), communicating holes (8A4), and the damping chamber (2C), thus damping exhaust noise by repeated effective contraction and expansion.

Abstract: A muffler includes an outer shell defining a chamber and first and second inner plates positioned to lie in the chamber. The second inner plate includes a base portion, a baffle integral with the base portion, and a tube portion integral with the base portion. The base portion includes an outer periphery defining a base portion boundary. The baffle extends between the base portion and the outer shell and the tube portion is positioned outside the boundary of the base portion.

Abstract: A silencer for a vehicle exhaust assembly is described. The silencer comprises an outer wall, a porous exhaust pipe which defines an inner wall and a sound absorbent fibrous material located between the inner and the outer wall. The sound absorbent fibrous material is substantially unidirectional and parallel with the direction of gas flow through the porous exhaust pipe. The fibre is enclosed in a silencer cartridge. A method of producing such a cartridge is also described.

Abstract: A muffler includes an outer shell defining a chamber and first and second tubes positioned in the chamber. The first tube has a flat side wall and the second tube has a flat side wall positioned adjacent to the fiat side wall of the first tube. Muffler further includes a baffle plate including a base and an edge defining a tube-receiving aperture and the first and second tube are positioned in the tube-receiving aperture.

Abstract: The invention concerns an exhaust silencer arrangement with a transverse exhaust silencer in a four-chamber type of construction, in particular for very small passenger-transporting motor vehicles, with a 3-cylinder rear-mounted engine and an exhaust gas turbocharger. The silencer comprises a housing which is composed of two half shells and accommodates a catalyst module in an integrated manner. The catalyst module, which does not have its own housing, forms a silencer system partition which divides the silencer into a 3-pot main chamber and an additional chamber which is in particular a resonator chamber and communicates with the main chamber via connection ducts formed in the half-shell housing.

Abstract: An exhaust system is provided with a structure that separates water from an exhaust stream and also attenuates the noise of the exhaust system. Water laden exhaust is directed from an inlet conduit through a perforated surface to precipitate water from the water laden exhaust stream. After the water is precipitated out of the exhaust stream, the gaseous portion of the exhaust stream continues from the inlet chamber 24 to an outlet chamber 28 and exits from the housing structure by passing through a first outlet conduit. The precipitated water passes from the housing structure through a second outlet conduit.

Abstract: The present invention provides a resonator including an upper case defining a portion of a resonance chamber and having a communicating hole communicating with the resonance chamber, a lower case integrally joined to the upper case and defining the resonance chamber together with the upper case, and an air pipe which is blow molded with the upper case being inserted, which is joined to an outer surface of the upper case where the communicating hole opens, an inside of which forms a gas passage, and which is defined with a through hole forming a common hole with the communicating hole, wherein the air pipe is blow molded by using polypropylene resin and the lower case is molded by using a nylon resin. In the resonator of the invention, because the resonator itself has heat resistance, it is unnecessary to dispose a heat insulator or the like, thereby decreasing the number of parts and the cost.

Abstract: A muffler comprises an outer shell defining a chamber, a baffle positioned in the chamber defined by the outer shell, and an inner plate positioned in the chamber. The inner plate includes a channel and a ridge coupled to the channel. The ridge extends away from the channel. The baffle includes an outer edge positioned adjacent to the outer shell and an inner edge positioned adjacent to the ridge and spaced apart from the channel.

Abstract: Pipe section running along a curve, intended for use in a muffler, comprising two hollow-formed molded parts which are mirror-symmetrical in relation to the radial plane of the curve and which have connected thereto a flat outside edge running in the radial plane along the outside of the curve, which flat outside edges are placed on each other so that the molded parts together form the pipe section, a third flat part being placed at the position of the radial plane between the two molded parts in such a way that a curved edge of said third flat part is situated between the two flat outside edges of the molded parts and is fastened to said outside edges.

Abstract: A muffler including paraboloid steel baffle chambers which may contain a continuously encased vacuum. These chambers can be shaped out of steel paraboloids. The exhaust of the engine (or noise source) can flow into the space between chambers and out of the muffler with high efficiency. The paraboloids are designed so that the noise is reflected to maximize a sound wave's path and minimize its intensity.

Abstract: A muffler (10) having a casing (21), an inlet opening (22) and an outlet opening (26). An initial partition (30) forms an expansion chamber (28). The casing (21) has mounted and formed therein a partition array (34) that includes a divider partition (36), a first intermediate partition (38), and a second intermediate partition (40). Partition array (34) is positioned in a main sound attenuation chamber (46). A collector partition (42) having a collector opening (44) is positioned between array (34) and opening (26). A pre-outlet chamber (48) is formed by collector partition (42) prior to outlet (26).

Abstract: A muffler is described for muffling both positive power and compression brake type engine retarders. The muffler includes an outer shell defining an internal volume. A first, inner, perforated wall is spaced from the outer shell and defines a first, annular, volume therebetween. A first volume of packing material is positioned within the annular volume. An inlet tube is oriented within the internal volume. In certain embodiments, the inner perforated wall circumscribes at least a portion of the inlet tube, and extends a distance of at least 25% of the axial length of the outer wall. Both single and dual muffler systems are described. Methods of use and operation are also provided.

Abstract: A muffler (12) has first and second outer shell members (14 and 16), and first and second inner baffle members (18 and 20). The inner baffle members are identical to each other and parallel to each other and rotated 180.degree. relative to each other about an axis (22) perpendicular to such parallel extension. The baffle members have oppositely facing laterally offset formed expansion chambers (32 and 34) partially overlapped to provide exhaust flow communication therebetween. The structural combination enables usage of identical components (18 and 20), which improves manufacturing efficiency and provides a cost reduction.

Abstract: A silencer comprising an outer sleeve made of a aluminum or an aluminum alloy, an inner sleeve made of a iron or steel, and acoustic material inserted between the outer sleeve and the inner sleeve. An end cap for closing a downstream end of the silencer comprising a first member made of iron or steel which is formed into a shape of the end cap, and a second member made of aluminum metal which is formed into the same shape as the outline of the first member, the peripheral portion of the first member and the peripheral portion of the second member being laminated. An end plate made of aluminum being mounted on an upstream end of the silencer. Clamping members made of iron or steel including female or male screws are secured to the end plate. An exhaust pipe is provided with a mounting seat at a fixed position thereof. The silencer can be secured to the mounting seat by means of the clamping members and bolts or nuts made of iron or steel. The end cap can be welded to a part of the outer sleeve.

Abstract: A tube element especially for exhaust systems and exhaust recirculation systems of combustion engines in vehicles which includes at least one helically or annularly corrugated bellows provided with cylindrical end fittings on each end of the bellows; a flexible hose made of metal and situated on an interior surface of the bellows; and a braiding hose made of metal wire which coaxially encloses an exterior surface of the bellows. The braiding hose being placed on the cylindrical end fittings together with the flexible hose so that the flexible hose and the braiding hose are connected firmly and at least indirectly. The braiding hose is installed in a state of pre-setting so that the braiding hose has a reduced radial cross-section which in frictional contact with the exterior surface of the bellows.

Abstract: An exhaust system structure and method comprising two or more silencers which are placed in series and are each provided with a tubular section, the edges of which are in each case attached to a transverse plate which marks the end of the section in question, and each tubular section is provided with sound-damping internal parts, two tubular sections with different cross-sections being mounted one behind the other, making use of a transverse plate, the external dimensions of which are related to the cross-sectional dimensions of the tubular section with the largest cross-section and provided with an opening, the dimensions of which are related to the cross-sectional dimensions of the tubular section with the smallest cross-section, in which exhaust system the transverse plate is attached to the edges of the two tubular sections by means of seamed roll joints.

Abstract: A muffler for small general-purpose engine includes a case comprising a pair of case halves coupled together and divided into a first chamber and a second chamber by a partition plate. An inlet of the exhaust gas is provided closer to a first end portion of the case in a first case half. An outlet of the exhaust gas is provided closer to a second end portion of the case in a second case half. A recess projecting from the first chamber toward the second chamber guiding the exhaust gas from the inlet toward the second end portion is provided in the partition plate opposite the inlet. A communication orifice is formed in the partition plate at a location offset from the recess and closer to the first end portion than the inlet.

Abstract: An exhaust gas muffler for an internal combustion engine of a portable, hand-guided working tool has a housing having an exhaust gas inlet, and exhaust gas outlet, and an outlet space, wherein the exhaust gas outlet opens into the outlet space. An outlet opening is provided downstream of the outlet space and has wall elements directing the exhaust gas flow in the exit flow direction. A rebound wall is positioned transverse to the exhaust gas outlet and delimits the outlet space while providing a connecting slot into the outlet opening. The connecting slot is spaced at a distance from the outer wall of the housing that extends substantially parallel to the rebound wall. A first ramp is positioned perpendicularly to the connecting slot and slants upwardly from the rebound wall to the outlet opening. A second ramp extends in a direction of longitudinal extension of the connecting slot from an end of the insertion slot opposite the first ramp to the edge of the first ramp opposite the connecting slot.

Abstract: A muffler for a two-stroke internal combustion engine has a housing enclosing a hollow space and having an exhaust gas inlet and an exhaust gas outlet. Shaped sheet metal members are mounted in the housing and define an exhaust gas flow channel. The flow channel extends at least over a portion of its length in a plane of the sheet metal members. A first one of the sheet metal members has a projecting portion projecting from the plane of the sheet metal members and forming a connector of the flow channel. The connector communicates with the exhaust gas inlet. A second one of the sheet metal members has a projecting portion projecting from the plane of the sheet metal members and forming an end portion of the flow channel opening into the hollow space of the housing.

Abstract: The invention provides a muffler for an internal combustion engine having excellent durability (resistance to scattering) even when being exposed to a high-temperature exhaust gas and capable of maintaining a high sound absorption coefficient over a long period. Such a muffler comprises a metal tube provided with a plurality of small holes, an inorganic fiber sound-absorbing material arranged on the outer periphery thereof and a metal shell covering the outside of the sound-absorbing material, in which a scattering prevention member is disposed between the metal tube and the sound-absorbing material. The sound-absorbing material is a laminated structure of crystalline alumna fiber mat and glass fiber mat. As the scattering prevention member, there is used a stainless woven wire cloth, a woven fabric made from inorganic fiber and a metal roll.

Abstract: A wet marine exhaust muffler includes a metallic housing and a polymeric jacket substantially encapsulating the metallic housing. The metallic housing defines one or more chambers in the interior of the housing. An inlet pipe and an outlet pipe each extend through openings in the polymeric jacket and communicate with at least one chamber in the interior of the housing. The metallic housing is preferably formed from stainless steel and the polymeric jacket is preferably formed from a thermoplastic material having a thickness of approximately 0.001 inch to 0.1 inch, and more preferably of approximately 0.005 inch to 0.060 inch.

Abstract: To damp the sound in an air conditioning system, particularly a vehicle air conditioning system, a tubular sound damping body is provided having openings at its opposite ends through which a liquid or gaseous medium flows. A respective connection tube is fitted at at least one and preferably at both of the openings, with the tube being of smaller cross-section than the sound damping body and the openings into the sound damping body. An isolating device in the form of an isolating element is around the inserted portion of each connection tube and also engages the interior of the sound damping body. Isolating element receiving recesses may be defined in the inserted end portion of the connection tube and the ends of the sound damping body for receiving the isolating elements. The isolating elements are comprised of an elastic rubber like material. Alternately, a spacer may be disposed around the elastic isolation device and engages the isolation device on the inside and the sound damping body on the outside.

Abstract: A muffler assembly (10, 210, 350) includes top outer shell (12), bottom outer shell (14), and drop-in inner cartridge (16, 212, 352) positioned to lie between top and bottom outer shells (12, 14). Top outer shell (12) abuts bottom outer shell (14) to define seam (71). Seam (71) includes inner surface (73) facing into interior cartridge-receiving chamber (76) defined between top and bottom outer shells (12, 14). Drop-in inner cartridge (16, 212, 352) includes outer edge (75) abutting inner surface (73) of seam (71) to cause drop-in inner cartridge (16, 212, 352) to lie wholly within interior cartridge-receiving chamber (76). Drop-in inner cartridge (16, 212, 352) includes inlet and outlet tubes (86, 88, 214, 216, 354, 356) and baffle system (23, 215, 357) having first side (142, 272) connected to top side (91, 231) of inlet tube (86, 214, 354) and second side (150, 280) connected to bottom side (97, 237) of outlet tube (88, 216, 356).

Abstract: The case of an intake silencer system includes a first case half and a second case half coupled to each other at mating faces, with an intake duct clamped between the mating faces. The intake duct opens into a resonant chamber within the case, so that noise is damped by a resonant effect. Three ribs are provided on an inner surface of the first case half, thereby defining four subsidiary silencing chambers each functioning as a side branch for producing a resonant effect to obtain a silencing effect in a wide frequency range. The ribs also contribute to an enhancement in rigidity of the wall surfaces of the case.

Abstract: An absorption/reflection exhaust muffler of multichamber design with an outer housing and two inner half shells, in which the exhaust gas duct is impressed or pressed in, and which form the inner partitions of the individual chambers. The two inner half shells are designed as a prefabricated, inner half shell system with a bent together edge section, which is pressed in into the outer housing. Compensation of expansion during thermal stresses between the inner half shells and the outer housing is possible as a result. The outer housing may optionally be an outer shell manufactured according to the winding technique, i.e., a wound outer jacket with two flat outer bottoms, or it may comprise two outer half shells manufactured according to the half shell technique.

Abstract: An exhaust muffler comprising an outer cylindrical body, front and rear end plates mounted on each end of the outer cylindrical body, porous plates fitted on the insides of the outer cylindrical body and each of the end plates, and partition plates for dividing the internal space of the outer cylindrical body into several chambers, wherein when joining the component parts with each other, three or four component parts are superposed via their joint portions each on the other and integrally joined by laser beam welding so as to obtain a reduction of welding steps and minimize the thermal influence in the manufacturing process while ensuring an air-tight condition of the partitioned chambers. When an exhaust pipe and tail pipe are connected to the end plates, respectively, they are laser beam welded to the end plates in a superposed fashion.

Abstract: To reduce turbulence in a fluid flow, especially exhaust gas from automotive internal combustion engines, within a flexible conduit element, a bellows (1, 40, 42) has an internal hose (6) located therein made of woven or knit metal wire. The hose is engaged against the internal corrugations of the bellows (1) and/or a connecting pipe (41) between adjacent bellows (40, 42) to guide the exhaust gases, and dampen vibrations and oscillations, which may become resonant with the corrugations of the bellows, and thereby decrease noise level during the gas flow. The hose (6) is engaged against the inner corrugations (3) of the bellows by, for example, first axially compressing the hose to result in permanent deformation of the wires to a diameter larger than the clear inner diameter of the bellows; by then forcing the hose into the bellows, the hose will resiliently compress and engage against the bellows.

Abstract: A combination comprises a muffler and a mounting band constructed and arranged to secure the muffler in a hanging orientation. The mounting band includes a continuous, arcuate metallic strap having first and second ends. The metallic strap is positioned in extension circumferentially around the muffler. The first and second ends of the metallic strap are welded to one another to retain the metallic strap as a continuous band around the muffler. The hanger is secured to a continuous portion of the metallic strap. The hanger is centered radially along the strap, at a location about 150.degree.-210.degree. from the weld of the strap ends.

Abstract: An exhaust muffler includes upper and lower internal plates and upper and lower external shells. The internal plates are formed to define a chamber therebetween. The external shells are formed to define chambers on opposite respective sides of the interconnected internal plates. An upper tube plate is secured to the upper internal plate. The upper tube plate and the upper internal plate are formed to define an inlet tube therebetween. The inlet tube includes louvers to permit exhaust gas flow into the chamber between the upper internal plate and the upper external shell. Louvers in the upper internal plate permit exhaust gas to flow from the upper chamber into the internal chamber between the internal plates. Louvers in the lower internal plate permit exhaust gas to flow into the lower chamber. An outlet tube communicates with the gravitational low point in the lower external shell and permits flow of exhaust gas from the muffler while siphoning condensate in the lower chamber.

Abstract: A muffler includes a pair of internal plates that are formed to define an array of channels and at least one chamber. The internal plates are connected in face-to-face relationship such that the channels define tubes that communicate with the chamber. At least one short section of conventional tube may be disposed between the plates to achieve a selected exhaust gas flow pattern. The connected internal plates is slid longitudinally into a tubular outer shell and end caps are secured to opposed ends to substantially enclose the muffler. The internal plates can be remanufactured prior to insertion into the tubular outer shell, and can be slid into tubular external shells of different lengths for significantly altering the acoustical tuning of the muffler.

Abstract: A suction noise muffler for a hermetic compressor which is capable of enabling a smooth flow of a refrigerant gas and reducing a suction noise by forming a predetermined shaped refrigerant gas flow guide path and a plurality of noise reducing sections, which includes an upper casing having a rectangular outer wall and a plurality of inner walls arranged within the outer wall, and a lower casing whereby the upper casing is inserted into the lower casing, for thus forming a refrigerant gas flowing path and a plurality of noise reducing sections thereby when assembling the upper casing and lower casing.

Abstract: A muffler includes a box-shaped member formed so as to define an inner space therein, and including at least two communication ports. An inner pipe is accommodated in the box shaped member, and includes a fluid passage formed therein. An end of the inner pipe is installed to one of the communication ports, and another end thereof is installed to another one of the communication ports. A separation is provided in the inner pipe which communicates the fluid passage with the inner space. The inner pipe can include a first tubular member, a part thereof formed integrally with the body by injection molding, and a second tubular member having an end. The end is disposed in the inner space so as to face an end of the first tubular member in spaced relation so as to form the separation. A guide and a fixing member can be formed on an inner wall surface of the body so as to connect the inner pipe with the communication port.

Abstract: A silencer for a single-cylinder diesel engine has a housing with an exhaust fume inlet at the side of the cylinder head and an outlet (2) to which is associated a baffle plate (5) mounted so as to vibrate and whose surface corresponds to at least the cross-section of the outlet (2). The baffle plate (5) is secured to the free end of a leaf spring whose other end is linked to the housing (1) of the silencer.

Abstract: The invention relates to an exhaust muffler for a motor vehicle, consisting of an external casing (1), an internal casing (2) and a central part (3) consisting of perforated tubing (4) and transverse partitions (5) assembled together to form a chicane, called the insides. The central part (3) is made of an enameled steel, the steel having the following composition in thousandths of a percent by weight:carbon between 0 and 100manganese between 0 and 500phosphorus between 0 and 30sulfur between 0 and 40aluminum between 0 and 60titanium between 0 and 200copper between 0 and 60nitrogen between 0 and 15,the remainder being iron and residual impurities, said steel being obtained by hot rolling at a final rolling temperature exceeding the Ar.sub.3 point to obtain a strip, which is coiled at a temperature higher than 600 degrees Celsius and, after cold rolling, is subjected to a recrystallization annealing.

Abstract: A bumper/muffler assembly is provided to simultaneously perform noise attenuation functions and impact protection for an automotive vehicle. The bumper/muffler assembly is formed at least in part from stamped sheets of metal. The sheets include an internal plate formed with inlet and outlet channels therein. Inlet and outlet tube plates are secured to portions of the internal plate adjacent the inlet and outlet channels such that inlet and outlet tubes are defined. A front external shell is disposed in proximity to the rear end of the vehicle and is configured to be spaced from portions of the internal plate to define a front chamber. A rear external shell also is spaced from the internal plate to define a rear chamber. A plastic material may be nested over the rear external shell for aesthetic attractiveness of the assembly.