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| Number | Title | Issue Date |
| 8141679 | Absorptive muffler suspension An absorptive muffler assembly includes a first body and a second body surrounding the first body. A resilient mount having at least one resilient portion and at least one support arm supports the first body and isolates the second body from vibrations of the first ... | 03/27/2012 |
| 7806230 | Absorptive muffler suspension A resilient mount useful in a muffler assembly includes a support arm, a bracket arm and at least one resilient portion. In one example, the resilient portion comprises neoprene to provide a cushion between the support arm and the bracket arm. The resilient mount is... | 10/05/2010 |
| 7487857 | Sonic coupling between an intake tract or engine compartment and the interior of a motor vehicle An apparatus for sonic coupling between an intake tract or engine compartment and a vehicle interior of a motor vehicle has a housing into which sound enters from the intake tract via a first line, and out of which sound exits into the vehicle interior via a second ... | 02/10/2009 |
| 7415956 | Engine air intake system with resilient coupling having internal noise attenuation tuning An engine air intake system, which may include a supercharger or other air-handling device, includes a resilient coupling connecting an air intake connector, such as a throttle body, and an air inlet duct. The resilient coupling includes a bellows convolution for al... | 08/26/2008 |
| 7380397 | Automobile exhaust pipe assembly The present invention describes an automobile exhaust pipes, and more particularly to an exhaust pipe capable of producing appropriate pressure to assist engine torque output when the engine is running at a low speed and expediting the waste gas to be discharged fro... | 06/03/2008 |
| 7364011 | Attenuating power booster The present invention includes a power booster pipe suitable for attenuating sound associated with the intake or exhaust of an internal combustion engine and reducing pressure drop associated with movement of gases during operation of the engine. Generally, a diffus... | 04/29/2008 |
| 7364013 | Shell main body for muffler The shell main body for a muffler includes an inner shell in a cylindrical shape with a cross-section of an imperfect circle defined by small arc portions alternating with large arc portions; and an outer shell wrapping the inner shell and formed in a cylindrical sh... | 04/29/2008 |
| 7293628 | Shell main body for muffler A cylindrical shell main body constituting a muffler main body is formed of two layers of an inner shell and an outer shell and has a cylindrical shape with a cross section that is not a perfect circle but is defined by alternated small arc portions and large arc po... | 11/13/2007 |
| 7291336 | Compositions and methods for enhancing immune responses mediated by antigen-presenting cells Molecular adjuvants are disclosed comprising an antigen presenting cell-targeting ligand functionally linked to an immunogen, e.g. tumor associated antigens, bacterial or viral antigens, etc. Methods are disclosed for delivery of these molecular adjuvants to patient... | 11/06/2007 |
| 7249652 | Fluid guideline, especially in the form of a tube for taking up untreated air in an air filter of a motor vehicle A fluid guideline with at least two structural elements made of substantially soundproof material has at least one opening for sound damping. An impedance change (in particular in the form of an impedance discontinuity) of the flow resistance of the fluid flowing th... | 07/31/2007 |
| 7188621 | Portable ventilator system A portable ventilator uses a ROOTS-type blower as a compressor to reduce both the size and power consumption of the ventilator. Various functional aspects of the ventilator are delegated to multiple subassemblies having dedicated controllers and software that intera... | 03/13/2007 |
| 7159692 | Silencer A silencer that comprises a casing, one or more pipes or passages leading a flow of gas to the casing and a device for leading gas from the casing. The silencer further has at least one internal chamber, one or more flow inlets to the chamber and one or more flow ou... | 01/09/2007 |
| 7111601 | Air induction system having an environmentally resistant acoustic membrane An air induction system for inducting air into an engine of an automobile is disclosed. The air induction system has an air cleaner and an air inlet tube. The air cleaner is in fluid communication with the engine of the automobile for filtering intake air inducted i... | 09/26/2006 |
| 7104358 | Silencer containing one or more porous bodies A silencer for silencing and also for filtering exhaust gases, contains at least one acoustic resonator chamber (13, 14, 15, 16) (Helmholtz frequency), at least one porous body (7, 8) the porous body (7, 8) occupying at least part of the chamber... | 09/12/2006 |
| 7051523 | Exhaust system assemblies employing wire bushings for thermal compensation Exhaust system assemblies employ wire bushings for thermal compensation to minimize noise due to “stick-slip” while the system cools. In a preferred embodiment, the wire bushings are formed of at least one strand of wire coiled about male end portions of pipe se... | 05/30/2006 |
| 7032709 | Exhaust-gas muffler An exhaust-gas muffler includes a muffler housing (2) having an inlet opening (3) and an outlet (4). The exhaust-gas muffler is especially for the internal combustion engine in a portable handheld work apparatus. At least one attenuating space (... | 04/25/2006 |
| 6959678 | Air intake apparatus and manufacturing method therefor The manufacturing method for the air intake apparatus has a holding-portion forming step, a temporarily fixing step, and a joining step. In the holding-portion forming step, a holding portion is formed. In the temporarily fixing step, the porous member is held by th... | 11/01/2005 |
| 6913112 | Noise attenuation assembly The present invention provides a noise attenuation assembly having at least one noise prevention pad disposed within an annular gap formed between a gas passage tube and an overlap tube. The noise prevention pad prevents the two tubes from coming in contact during t... | 07/05/2005 |
| 6902030 | Sound muffling apparatus for air operated equipment A muffler for equipment powered by compressed air, the muffler comprising a flexible muffler body formed from a sufficiently resilient material to resiliently deform under the influence of an exhaust air stream from an air motor, the body having an inlet and an outl... | 06/07/2005 |
| 6892855 | Embossed shell for spun mufflers An exhaust muffler with a single-wall shell having a first end and a second end features a plurality of embossments formed on the shell and extending from the first end of the muffler to the second end of the muffler. The embossments are arranged in a pattern such t... | 05/17/2005 |
| 6868939 | Exhaust silencer system An improved exhaust system for an internal combustion engine generally comprises two expanding megaphones, separated by a dual core annular flow silencing section. The two or split megaphone design facilitates broadening of the time of the negative pressure wave to ... | 03/22/2005 |
| 6840348 | Exhaust muffler An exhaust muffler for an internal combustion engine included in a motorcycle includes a perforated inner pipe (32), an outer pipe (31) coaxially surrounding the inner pipe (32), and a glass wool mat (33) packed in a space between the inn... | 01/11/2005 |
| 6799657 | Absorptive/reactive muffler for variable speed compressors An absorptive and reactive muffler includes an annular flow path for the gas with the center of the annulus having a plurality of resonators which are in open communication with the downstream end of the annular flow path and make up the reactive portion of the muff... | 10/05/2004 |
| 6530452 | Reactive silencer for industrial air channels and its use A reactive silencer intended for industrial supply air or exhaust air channels has a sound attenuator chamber (10), to which is fitted a partition wall (12) dividing the sound attenuator chamber into a first and second chamber part (14, 16). The partition... | 03/11/2003 |
| 6347609 | Wedge section multi-chamber resonator assembly An air resonator for an air intake system includes a plurality of serially positioned increasing volume chambers. Air passing to the engine passes through these chambers. Noise passing from the engine back towards the source of air will also pass through ... | 02/19/2002 |
| 6158546 | Straight through muffler with conically-ended output passage The present invention provides a muffler which has an outlet tube with a funnel shaped element having a large diameter end positioned in an expansion chamber and conically tapering to a junction with a cylindrical neck element extending into an inlet end ... | 12/12/2000 |
| 6105717 | Pipe section punning along a curve 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 radi... | 08/22/2000 |
| 5905233 | Noise suppressor for displacement compressors A noise suppressor for a displacement-type compressor, in particular in an engine installation with such a compressor connected in series with a turbocharger. The noise suppressor comprises a nozzle (31). The inlet of the nozzle is connected to the outlet... | 05/18/1999 |
| 5657793 | Vacuum cleaner hose and method for making same A method and apparatus for manufacturing a hose for a vacuum cleaner, such hose having anti-whistling characteristics. In a standard blow molding process, a blow pipe is configured with a plurality of printing rollers having arcuate outer surfaces configu... | 08/19/1997 |
| 5350888 | Broad band low frequency passive muffler A sound absorbing muffler used to attenuate noise carried by the exhaust gases of an internal combustion engine includes a straight-through flow tube of cross-section having no baffles or flow reversals. The muffler utilizes both reactive and dissipative ... | 09/27/1994 |
| 5285026 | Reactive sound attenuator, in particular for air ducts in paper mills The invention concerns a reactive sound attenuator for air-conditioning ducts, in particular for air ducts in paper mills. The sound attenuator includes at least two chambers separated from another by means of a partition wall. The partition wall is provi... | 02/08/1994 |
| 5173576 | Muffler for an internal combustion engine A muffler for an internal combustion engine or the like having improved attenuation, minimal back pressure and minimal effect to column inertia through the muffler. The muffler comprises an outer housing and a first perforated tube insert extending from o... | 12/22/1992 |
| 5170020 | Rainproof exhaust pipe A vertical exhaust pipe having an inner pipe with an upper opening. An outer pipe is positioned around the inner pipe and has an end portion that extends beyond the upper opening in the inner pipe, said end portion defining an outlet through which exhaust... | 12/08/1992 |
| 4998597 | Insulated exhaust pipe attachment means Attachment means for connecting an insulated pipe to an element, such as the manifold, in the exhaust system of a vehicle. The attachment means includes a conduit which extends into the end of the insulated pipe. A transverse lug or a helical flange on th... | 03/12/1991 |
| 4841728 | Straight through type muffler for generating the exhaust flow from an internal combustion engine A straight through type muffler for generating an exhaust flow from an internal combustion engine includes a closed expansion chamber in communication with the straight through passage of the muffler. A minority of the gases passing through the straight t... | 06/27/1989 |
| 4674594 | Silencer and a method of manufacturing the silencer A silencer comprising a cylindrical casing assembled from two half-cylindrical shell members is produced by placing in one of the shell members a row of modular channel blocks and then completing the silencer by mounting the other shell member over the ro... | 06/23/1987 |
| 4448538 | Device for reducing static and dynamic pressures in pipelines, particularly of solid-borne sound in tubular conduits In order to reduce static and dynamic pressures in pipelines or tubes and, in particular, in order to attenuate the transmission of sound through tubes in a longitudinal direction it is proposed to provide an outer member and/or an inner member of the tub... | 05/15/1984 |
| 4257370 | Combined gear cover and mount for an internal combustion engine A combined gear cover and mount for an internal combustion engine is disclosed for use on an engine having a vibration damper mounted on a projecting end of the engine crankshaft wherein the gear cover includes a housing for enclosing the vibration damper... | 03/24/1981 |
| 4244440 | Apparatus for suppressing internally generated gas turbine engine low frequency noise A method and apparatus for suppressing internally generated gas turbine engine low frequency noise is disclosed. The apparatus is comprised of means for structuring the cross-sectional area of the gas flow path into one or more open elements of a predeter... | 01/13/1981 |
| 4228868 | Muffler apparatus A muffler apparatus has an outer housing for being attached to a motorcycle or the like. Disposed internally of the housing is a passageway assembly having a connecting tube with a flare for being connected to an exhaust pipe and a perforated tube connect... | 10/21/1980 |
