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| Number | Title | Issue Date |
| 8079441 | 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 a... | 12/20/2011 |
| 7871729 | System and method for mixing gases in a fuel cell exhaust system A system and method for reducing concentrations of reactants in gases flowing through an exhaust system are disclosed. Briefly described, one embodiment comprises creating a turbulent flow of gases along a periphery region of an exhaust pipe, the turbulent flow crea... | 01/18/2011 |
| 7779962 | 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 a... | 08/24/2010 |
| 7726442 | Baffle equipped with flap assembly The present invention relates to an acoustic baffle device for sealing a cavity of a vehicle body at a predetermined cross section of the cavity, comprising a piece of sealing material that is formed in a shape corresponding to but being smaller than the shape of th... | 06/01/2010 |
| 7451854 | Exhaust flow rate control valve An exhaust flow rate control valve includes an on-off valve which is switched between a closed state in which a flow passage area of an exhaust pipe is decreased, and an opened state in which the flow passage area is increased. A notch is formed in the on-off valve,... | 11/18/2008 |
| 7438157 | Muffler for an exhaust gas system A muffler for an exhaust gas system of an internal-combustion engine has an exhaust gas inlet and a first flow pipe arranged inside the muffler and completely penetrating the muffler. A shut-off device is arranged in the first flow pipe, for the shutting-off and ope... | 10/21/2008 |
| 7428947 | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation A powertrain control system is provided that includes an engine having multiple cylinders. A controller selectively activates the cylinders to provide a cylinder combination having a desired power displacement. In one example powertrain control system, the controlle... | 09/30/2008 |
| 7426979 | Exhaust gas control valve An exhaust gas control valve includes a valve seat, a valve plate having a first exhaust gas pressure receiving area corresponding to an opening area and a second exhaust gas pressure receiving area larger than the first area; and a spring for closing the valve. In ... | 09/23/2008 |
| 7364010 | Exhaust system for a motorcycle, and motorcycle including same A motorcycle, having both left and right mufflers, has an exhaust structure which enables an increase in the allowable margin through which the rear wheel is permitted to rise. A main exhaust pipe extends from an engine to one side of a shock absorber disposed on th... | 04/29/2008 |
| 7350349 | Method and device of a particle filter for an exhaust system, silencer including such a device, and a combustion engine driven vehicle Method and device for a particle filter for an exhaust system for a combustion engine, wherein the filter is regenerated by spontaneous combustion of particles accumulated in the filter. Exhaust gases from the combustion engine are led, during operation, past the fi... | 04/01/2008 |
| 7337609 | Diesel exhaust system variable backpressure muffler The invention concerns diesel particulate filter regeneration in an exhaust system of a vehicle having a diesel engine. The particulate filter regeneration is selectively accomplished by actuating a particulate filter backpressure valve located downstream of the die... | 03/04/2008 |
| 7325651 | Motorcycle exhaust system To provide a motorcycle exhaust system, which is less susceptible to the elevated temperature of the exhaust gases and vibrations induced by the motorcycle combustion engine (E) and in which the sectional area of the exhaust passage can be properly adjusted independ... | 02/05/2008 |
| 7310942 | Exhaust passage control valve Exhaust passage control valve 10 may comprise housing 30, valve member 20, and helical torsion spring 40. Housing 30 has an exhaust passage. Exhaust gas from an internal combustion engine flows through the exhaust passage of the ho... | 12/25/2007 |
| 7273130 | Device and method for active soundproofing, and power unit for aeroplanes A device for active noise reduction has a chamber, which is arranged laterally in relation to a gas flow, and a chamber opening constructed in one wall of the chamber. In the area of the chamber opening, a deflection device is adjustably arranged. The deflection dev... | 09/25/2007 |
| 7240768 | Flapper finger valve A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherei... | 07/10/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 7210912 | Reciprocating piston compressor having improved noise attenuation A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap... | 05/01/2007 |
| 7191849 | Pneumatic tool A pneumatic tool includes a shell with a chamber defined therein, a first passage communicated with the chamber and a second passage communicated with the chamber. A rotor is installed in the chamber for rotation when driven by pressurized air flowing into the chamb... | 03/20/2007 |
| 7182171 | Muffler with variable acoustic properties A muffler with variable acoustic properties. A pressure cell with a diaphragm, a spring, a piston, a piston rod, a closing element on the piston rod, and a pressure connection line are integrated into a housing. The diaphragm is thermally insulated against the pisto... | 02/27/2007 |
| 7090048 | Method and apparatus for exhaust sound attenuation on engines with cylinder deactivation A system for attenuating exhaust noise from an engine with a first group of active cylinders and a second group of deactivatable cylinders includes a first exhaust manifold connected to the first group of active cylinders and a second exhaust manifold connected to t... | 08/15/2006 |
| 7066296 | Valve device for silencer A valve device for a silence opens a bypass passage provided in the silencer to flow exhaust gas through the bypass passage when exhaust gas pressure rises to a certain pressure. The valve device includes a base having a valve opening through which exhaust gas flows... | 06/27/2006 |
| 7063182 | Muffler baffle plate spacer formed from stock material A muffler has a pair of spaced baffle plates that each receive a flow tube. The flow tubes have spaced ends such that an intermediate chamber is defined to receive air flow to be dampened. In existing mufflers, a bracket needed to be formed to the desired length to ... | 06/20/2006 |
| 6968923 | Reduced noise valve stack connection Disclosed is a silencer system configured to allow for thermal growth thereof while attenuating noise created by expansion of high-pressure fluid flowing therethrough. The silencer system comprises a tubular inner sleeve, a tubular flexible bellows, a tubular vent s... | 11/29/2005 |
| 6938729 | Exhaust gas system An exhaust gas system for an internal combustion engine, in particular, of a motor vehicle has two mufflers through which the exhaust gas is able to flow in a parallel fashion. A switching unit makes it possible to selectively convey the exhaust gas flow of the inte... | 09/06/2005 |
| 6918463 | Muffler for engine A muffler comprises a casing and an exhaust pipe penetrating the casing. An exhaust gas chamber 4 is defined between the outer wall surface of the exhaust pipe and the inner wall surface of the casing. In the exhaust pipe positioned in the casing, an enlarged... | 07/19/2005 |
| 6899199 | Flapper finger valve assembly A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherei... | 05/31/2005 |
| 6755279 | Controllable muffler system for internal combustion engine A controllable muffler system is sued for use with an engine that produces a power by burning fuel. The system comprises a first passage section extending from the engine for having an exhaust gas of the engine flow therethrough. The first passage section has a cata... | 06/29/2004 |
| 6691823 | Suction muffler in reciprocating compressor A suction muffler in a reciprocating compressor is installed over a suction valve to attenuate complex sound pressure (noise) such as vibrational noise, valve sonance, flowing noise and pulsative noise produced from the suction valve when low temperature,... | 02/17/2004 |
| 6644437 | Vehicle exhaust with length-equalizing muffler An exhaust system provides the benefits of equal or near equal length exhaust pipes for vehicles (for example with transverse engines) having differing length exhaust pipes connected with a single muffler. In accordance with the invention, the muffler has... | 11/11/2003 |
| 6637545 | Silencer A device for silencing a flowing gas which includes a valve housing in which a valve is mounted. A separate pressure regulator is provided which is in communication with the flowing gas and which is responsive to gas pressure to thereby influence movement... | 10/28/2003 |
| 6581721 | Valve for a control muffler A valve for a control muffler includes: a valve element which is swingably journaled on a support shaft 5 supported by shaft holes 41a of a pair of first shaft supporting portions 41 inside the support shaft 5; bushes 6 which are respectively interposed b... | 06/24/2003 |
| 6564902 | Device and method for a sound-attenuating unit A device for a sound-absorbing unit for reduction of sounds from a flowing gas stream, including a first flow path and a second flow path for said gas stream and a switch-over device for alternating guiding of the gas stream along the first flow path and ... | 05/20/2003 |
| 6338246 | Exhaust passage control valve An exhaust passage control valve has a valve element of a spiral shape mounted on a valve seat portion of a housing through which exhaust gases from an engine pass. The valve element is urged by a valve spring in a direction of closing the valve. A spring... | 01/15/2002 |
| 6158215 | Varible exhaust resonance chamber valve system for two-cycle engines A variable exhaust resonance chamber valve system for internal combustion engine. The engine includes a cylinder having an exhaust port with an axial extent along the axis of the cylinder structure. An exhaust passage having a resonance port extends from ... | 12/12/2000 |
| 6102154 | Muffler In a muffler, a first exhaust outlet pipe has an opening-closing device, and a second exhaust outlet pipe is connected or joined to the first exhaust outlet pipe at a downstream portion of the opening-closing device. An overall length of the second exhaus... | 08/15/2000 |
| 6065564 | Valve apparatus for muffler To a housing having a valve opening which serves as a bypass passage for exhaust gases, there is fixed one end portion of a plate valve which is capable of elastic deformation by deflection. The housing is provided with an enclosing wall which projects in... | 05/23/2000 |
| 6053277 | Silencer assembly for pressurized gases A silencer assembly primarily for the passage therethrough of exhaust gases from an adsorption dryer tower comprises a silencer element to one end of which pressurized gas is directed from an outlet, a control valve downstream of the silencer element, and... | 04/25/2000 |
| 5959263 | Bypass muffler This invention relates to an exhaust gas muffler assembly for internal combustion engines which is operable in both a muffled or unmuffled mode. In exterior appearance, the bypass muffler of this invention looks like a conventional muffler having a shell ... | 09/28/1999 |
| 5917161 | Muffler with variable damping characteristics A muffler having a movable valve disk, with the help of which at least one of the tubes in the muffler housing can be opened and closed. The actuation organ for the valve disk is a corrugated tube, the fixed end of which is placed into an opening in the h... | 06/29/1999 |
| 5894115 | Exhaust system apparatus and noise suppression method An exhaust system includes an exhaust pipe attached to the engine. Attached to the exhaust pipe is a muffler which has an exhaust gas inlet, a plurality of expansion chambers through which exhaust gas flows, and at least one wall between adjacent expansio... | 04/13/1999 |
