Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8439158 | Acoustic resonator and sound chamber An acoustic resonator adaptable to a sound chamber is designed to decrease a sound pressure while increasing a particle velocity of medium particles in a low frequency range without increasing the overall size thereof. The acoustic resonator is constituted of a pipe... | 05/14/2013 |
| 8393437 | Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator A method of designing/making an acoustic side branch resonator structured to be coupled to a standpipe of, for example, a nuclear power plant, wherein the acoustic side branch resonator includes a plurality of wire mesh elements for damping purposes. The method incl... | 03/12/2013 |
| 8381871 | Compact low frequency resonator A resonator for a vehicle is provided, including a housing having at least one chamber formed therein. The housing has at least one aperture formed in a wall thereof. The housing is in fluid communication with an air conduit of the vehicle. At least one flexible mem... | 02/26/2013 |
| 8205715 | Muffler combination A muffler combination includes two pipe units each having a cylindrical shell and having an entrance and an exit, an inlet tube connected to the entrance, an outlet tube connected to the exit, and a housing engaged in each of the cylindrical shells, the housings eac... | 06/26/2012 |
| 8177024 | Accoustic attenuation device for an intake line of a combustion engine and intake line incorporating same The present invention relates to an acoustic attenuation device for an intake line of an internal combustion engine and to an intake line such as this incorporating same. An acoustic attenuation device according to the invention is intended to have a flow of pressur... | 05/15/2012 |
| 8136628 | Exhaust system for motorcycle An exhaust system for a motorcycle is configured to enhance output while maintaining a necessary noise level. The exhaust system includes an exhaust pipe connected to an engine, and a silencer connected to the exhaust pipe. The silencer includes a hermetically seale... | 03/20/2012 |
| 8113313 | Pipe assembly with scoop for directing fluid into a standpipe and for mitigating acoustic and vortex coupled resonance A piping assembly for directing fluid and mitigating acoustic and vortex coupled resonance is provided that includes a main pipe delivering fluid in a first direction; a standpipe coupled to the main pipe at an intersection; and a scoop positioned at the intersectio... | 02/14/2012 |
| 8087493 | Sound absorber for a pipe-shaped, cavity-forming body The present invention relates to a coolant circuit of a cooling system including a pipe-shaped body defining a cavity. It has a sound absorber defining a flow channel and at least one resonator chamber which is connected to the flow channel via a connection channel.... | 01/03/2012 |
| 7946383 | Acoustic load mitigator A system for reducing an acoustic load of a fluid flow includes a first pipe. The first pipe includes a first end and a second end and a first aperture and a second aperture, the first and second apertures being intermediate the first and second ends. A second pipe ... | 05/24/2011 |
| 7946382 | Gas compressor with side branch absorber for pulsation control A method and system for reducing pulsation in lateral piping associated with a gas compressor system. A tunable side branch absorber (TSBA) is installed on the lateral piping. A pulsation sensor is placed in the lateral piping, to measure pulsation within the piping... | 05/24/2011 |
| 7934581 | Broadband noise resonator An apparatus comprising includes a conduit portion having a conduit inner surface and a conduit outer surface, and a plurality of chambers in fluid communication with the conduit portion. The chambers include a first chamber defined, at least in part, by a first out... | 05/03/2011 |
| 7905319 | Venturi muffler A venturi muffler is made of a plurality of metallic tubular stepped members which are stacked together and define at least one sound-reflective chamber which opens through an annular venturi passage into an axial flow passage of the venturi muffler thereby creating... | 03/15/2011 |
| 7870930 | Exhaust system with external helmholtz resonator and associated method An exhaust system comprises a muffler and a Helmholtz resonator. The muffler comprises an exhaust inlet aperture for receiving exhaust gas into the muffler, an exhaust outlet aperture for discharging exhaust gas from the muffler, and a resonator aperture. The Helmho... | 01/18/2011 |
| 7857094 | Combustion chamber for a gas turbine engine A combustion chamber for a gas turbine engine comprising at least one Helmholtz resonator having a resonator cavity and a resonator neck in flow communication with the interior of the combustion chamber. The cavity extends around at least part of the neck and is spa... | 12/28/2010 |
| 7854297 | Muffler and related systems Mufflers are provided for a vehicle exhaust system having a combustion chamber and an exhaust pipe. The vehicle exhaust system is configured to reduce the noise of combustion gasses generated in the combustion chamber. An exemplary muffler includes a proximal end an... | 12/21/2010 |
| 7810609 | Muffler An absorption muffler includes a metallic exhaust pipe including a plurality of perforations, a polymeric housing carried by the exhaust pipe and enclosing the plurality of perforations, and including axially opposed ends. Thermal insulation is carried radially betw... | 10/12/2010 |
| 7757808 | Noise reduction system A noise reduction system for a device having a noise generating subsystem includes a Helmholtz resonator and a controller. The Helmholtz resonator is disposed in fluid communication with the noise generating subsystem, and includes an active material responsive to a... | 07/20/2010 |
| 7690478 | Continuously variable tuned resonator A resonator for a vehicle air intake system is disclosed, wherein the resonator is variable tuned to militate against the emission of sound waves caused by the engine and other sources at a wide range of engine speeds. ... | 04/06/2010 |
| 7600607 | Flow-through sound-cancelling mufflers A sound-cancelling flow-through muffler includes a linear first inner passage, and a curved or zig-zagged second outer passage that wraps around or surrounds the inner passage and that is situated between the linear first inner passage and an exterior wall of the mu... | 10/13/2009 |
| 7552797 | Vehicular exhaust system A system and method for dissipating at least one pressure wave in an exhaust gas flow is disclosed. A vehicular exhaust system directs the exhaust gas flow through a plurality of coaxial and perforated generally cylindrical tubes contained within an insulated canist... | 06/30/2009 |
| 7552796 | Turbine engine tailcone resonator A turbine engine resonator comprising a panel and a vessel. The panel is along a flow path within the engine and has an aperture. The vessel has a mounting flange secured to the panel. The flange has an aperture mated to the aperture of the panel. The vessel has a b... | 06/30/2009 |
| 7540353 | Resonator A resonator is arranged in an intake system including a pipe section for partitioning an intake port from an intake passage that communicates the intake port with a combustion chamber of an engine, the resonator including: a branch pipe having one end branching to t... | 06/02/2009 |
| 7527125 | Muffler for an exhaust system The present invention relates to a muffler for an exhaust system of an internal combustion engine, including a housing having at least one absorption chamber which is filled with an absorbent material that has an absorbent effect for airborne sound, a straight-throu... | 05/05/2009 |
| 7506723 | Muffler for an exhaust gas system The invention relates to a muffler for an exhaust system of an internal combustion engine, consisting a housing having at least one exhaust inlet and at least one exhaust outlet and having at least two pipes at the inlet end or at the outlet end, at least one of whi... | 03/24/2009 |
| 7464788 | Apparatus for transmitting sound in a motor vehicle An apparatus for transmitting sound in a motor vehicle having a housing (1) with an inner partition (2), which together define two separate subspaces (3, 4). A transmission valve (6) which separates the two subspaces (3, 4) is prov... | 12/16/2008 |
| 7389852 | Integrated heat exchanger and muffler unit An integrated heat exchanger and muffler unit (50,120,140) is provided for transferring heat between a first fluid and a second fluid, and for muffling the noise of the first fluid. The unit includes a housing (52) including a first inlet (60) f... | 06/24/2008 |
| 7387188 | Sound absorber A sound absorber includes an inner component and an outer component surrounding the inner component, the inner component defining an inner wall provided with apertures, and the outer component defining an outer wall extending along the inner wall. For improving the ... | 06/17/2008 |
| 7380638 | Exhaust noise control for motorcycles A noise control apparatus for a motorcycle exhaust system. The apparatus includes at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gases are optionally directed through noise attenuating means. The apparatus i... | 06/03/2008 |
| 7380635 | Interference-based exhaust noise attenuation An interference-based exhaust noise attenuation device and method for exhaust flow from an internal combustion engine that generates compressive waves in the exhaust flow. The device includes at least a direct path for the exhaust flow; a looped path for the exhaust... | 06/03/2008 |
| 7381032 | Hermetic compressor and freezing air-conditioning system In a hermetic compressor in a freezing refrigerating system or an air-conditioning system such as a refrigerator or a showcase, a construction is disclosed for intending to provide a low-noise hermetic compressor by effectively attenuating a pressure pulsation havin... | 06/03/2008 |
| 7372230 | Off-axis rotary joint An off-axis rotary joint (20) for selectively enabling communication of a signal (i.e., electrical and/or optical) between a housing (21) mounted for rotation about an axis (y-y) relative to a hollow shaft assembly (22) at all permissible relati... | 05/13/2008 |
| 7367424 | Eccentric exhaust muffler for use with auxiliary power units A muffler system is provided for use with an auxiliary power unit. In one embodiment, and by way of example only, the system includes an outer can, an annular baffle, and a tube. The outer can has a sidewall including a forward end, an aft end, and a cavity extendin... | 05/06/2008 |
| 7364012 | Dual-neck plane wave resonator A resonator and method of designing a resonator including a cavity having an effective length that exceeds λ/8 such that a standing wave having an anti-node will form in the cavity. First and second necks each having first ends are attached to and in fluid communic... | 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 |
| 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 |
| 7357220 | Systems and methods for controlling acoustical damping A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The contr... | 04/15/2008 |
| 7353791 | Sound increase apparatus A sound increase apparatus includes a first hollow body member that communicates with an intake flow path of an internal combustion engine, a second hollow body member that communicates with the first hollow body member, and a vibration member capable of vibrating i... | 04/08/2008 |
| 7337876 | Suction apparatus with noise reduction means A suction apparatus is provided with noise reduction means in one or more airflow passages for reducing noise emission from an airflow generator or the like, wherein at least one airflow passage is provided with at least one indentation with a predetermined depth ex... | 03/04/2008 |
| 7337877 | Variable geometry resonator for acoustic control The present invention provides a resonator for attenuating acoustic vibration from an air intake passage. The resonator includes a neck, a resonator chamber, a piston-type member, and an actuator. The neck is attached between the air passage and the resonator chambe... | 03/04/2008 |
| 7334663 | Variable resonator A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a singl... | 02/26/2008 |
