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| Number | Title | Issue Date |
| 7861824 | Sound absorber for an exhaust system The invention relates to a sound absorber for an exhaust system having a Y-shaped feed piece arranged upstream from the sound absorber, combining two exhaust gas-carrying lines to form a single line entering into the sound absorber whereby the Y-shaped feed piece an... | 01/04/2011 |
| 7426980 | Internal combustion engine exhaust system An exhaust system for an internal combustion engine having two banks of cylinders by which pulses of exhaust gas are alternately directed to a diverter subassembly. The diverter subassembly, which is located in the muffler, includes a perforated gas decelerator cham... | 09/23/2008 |
| 7377359 | Device for modulating noise in a motor vehicle In a device for noise configuration in a motor vehicle which has an internal combustion engine with at least two gas conduits connected to different cylinders of the engine, the gas conduits are interconnected by means of a cross-flow section formed by a housing whi... | 05/27/2008 |
| 7316292 | Spun extrusion side entry muffler By using a spun extrusion method to form a side entry exhaust inlet, a muffler can be completely stuffed and end caps can be spun onto opposing ends of the muffler on a high speed production line without interruptions. The side entry exhaust inlet is formed within a... | 01/08/2008 |
| 7219764 | Exhaust muffler A muffler may comprise a casing having an internal volume, an inlet and an outlet, and a diverter plate dividing the internal volume into a first chamber and a second chamber. The diverter plate may comprise a baffle wall portion and at least one diverter having a d... | 05/22/2007 |
| 7104359 | Muffler having a baffle with angled plates A muffler having a baffle with angled plates includes a one piece baffle, a container and two end caps. The one piece baffle has at least three different configurations. The baffle preferably has two, three or four plates, namely “V”, “Z” or “W” shapes. ... | 09/12/2006 |
| 7018590 | Reverse flow catalytic muffler A catalytic muffler having a housing with a first chamber and a second chamber fluidly communicating through a catalyst bed interspersed there between. A first baffle assembly in the first chamber extends between the catalyst bed and the housing. An inlet passage ex... | 03/28/2006 |
| 6959782 | Tuned exhaust system for small engines A tuned exhaust system for small two cylinder engines, the exhaust system including a pair of exhaust passage through which exhaust gasses pass. The exhaust passages are dimensioned to providing a tuning effect to the exhaust gasses for enhanced engine performance. ... | 11/01/2005 |
| 6955043 | Muffler assembly A muffler assembly for an internal combustion engine of a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine or the like includes an exhaust-gas muffler (1) which has a muffler housing (10). The muffler housing (10... | 10/18/2005 |
| 6953104 | Muffin fan hush hood A low noise method and apparatus with the apparatus including a hood for mounting over an exhaust outlet duct to capture a fluid stream and then redirect the fluid stream to a fluid outlet in the hood through the use of smoothly curving duct that maintains the fluid... | 10/11/2005 |
| 6938727 | Integrated engine compartment component and air intake system A fan shroud includes a fan shroud portion having a surface including an aperture. A cooling fan is supported proximate to the aperture for permitting air flow through the fan shroud from the environment to the engine compartment. An air intake portion is supported ... | 09/06/2005 |
| 6932189 | Device for noise structuring in a motor vehicle A device for noise structuring in a motor vehicle has a plurality of gas-carrying lines connected to an internal combustion engine. At least two of the gas-carrying lines are acoustically linked together by at least one connection. ... | 08/23/2005 |
| 6926117 | Muffler for pneumatic hand tool A muffler for quieting the operation of a pneumatic tool. In one embodiment the muffler (630) is disposed within a volume defined by a peripheral wall (612) that receives an exhaust stream. An upper plate (631) having several open tubes (632 | 08/09/2005 |
| 6918526 | Muffler for staple guns A muffler is received in a passage of an end member connected to a handle of the staple gun and a fitting extends from the end member so as to be connected to a hose. The muffler includes a tubular body and a plurality of plates extend from an end of the tubular bod... | 07/19/2005 |
| 6913111 | Mountable discharge pipe for an end muffler as well as an end muffler for motor vehicle A mountable discharge pipe for an end muffler has devices for fastening the discharge pipe to an end muffler housing. A hook provided on the discharge pipe can be suspended at the end muffler housing, and a holding lug provided with an opening is arranged at the dis... | 07/05/2005 |
| 6796402 | Muffler having isolated dual flow baffle structure An exhaust that has two isolated baffle systems in one container. This allows the exhaust from one manifold to be muffled and exhausted independently of the other manifold's exhaust. Moreover, the muffler is the same size as existing mufflers, so that it fits into t... | 09/28/2004 |
| 6779628 | Device for producing an overtone-rich sporty exhaust sound The device for producing an overtone-rich, sporty exhaust sound of the exhaust system of a four-cylinder engine includes exhaust pipes with four manifold pipes, at least one front pipe and a tail pipe. The length and/or cross-section of at least one exhaust pipe dif... | 08/24/2004 |
| 6702062 | Exhaust system for automobile engine An exhaust system having an exhaust manifold that comprises a plurality of single-shell discrete exhaust pipes connected to an engine, a double-shell collective chambered pipe joined to the discrete exhaust pipes and comprising an internal pipe shell into... | 03/09/2004 |
| 6622819 | Sound attenuator for pneumatic exhaust The present invention provides a sound attenuator for pneumatic exhaust that includes a body having an open end and an inner cavity defined by an inner wall, an inlet port provided in the body adapted to establish fluid communication between a source of p... | 09/23/2003 |
| 6588203 | Exhaust device of internal combustion engine An engine including a silencer in the exhaust passage thereof, wherein an exhaust gas flow passage pipe is arranged in the silencer body and a particulate filter is arranged inside the exhaust gas flow passage pipe. A first exhaust gas inflow-outflow open... | 07/08/2003 |
| 6520287 | Methods and systems for low temperature cleaning of diesel exhaust and other incomplete combustion products of carbon-containing fuels Systems and apparatus for degrading and cleaning combustion products of carbon-containing fuels such as fossil fuels. The systems and apparatus utilize catalytically reactive particles that are at least partially suspended by moving gases within a reactio... | 02/18/2003 |
| 6470998 | Modular muffler with end plate adaptors and spark arresters A modular muffler that is quickly and easily adapted for use with a wide variety engines is disclosed. The muffler has a dimensionally standardized body member with end portions that may receive any of a number of adaptor end plates provided with various ... | 10/29/2002 |
| 6467260 | Gas flow headers for internal combustion engines An exhaust header system for an internal combustion engine having improved exhaust gas flow characteristics. Primary pipes extend from openings in a flange bolted to the engines exhaust ports. The primary pipes come together at a collector pipe into which... | 10/22/2002 |
| 6457552 | Methods and apparatus for low back pressure muffling of internal combustion engines Systems and apparatus for muffling sounds produced by an internal combustion engine, and optionally catalytically degrading pollutants within waste exhaust gases. The systems and apparatus utilize a bed of particles within a muffling chamber. The gases ar... | 10/01/2002 |
| 6431311 | Muffler with interchangeable outlet tips A muffler assembly is disclosed allowing one or more outlet tips to be secured to an exhaust. The muffler comprises a casing having an outlet end including threaded holes or threaded bolts attached to the casing, an outlet tip with a tubular member and an... | 08/13/2002 |
| 6382347 | Exhaust muffler for an internal combustion engine A single-in/single-out exhaust muffler 20 for an internal combustion engine includes a curved inner tube (26), an exhaust inlet (24) in communication with a first leg (32) of the curved inner tube (26), and an exhaust outlet (28) in communication with a s... | 05/07/2002 |
| 6161646 | Turbo-generator exhaust noise silencer A silencer for reducing acoustic energy in an exhaust stream of gases from a combustion type source, particularly turbo-generators. In a preferred embodiment, the silencer includes an outer housing having at least one outlet opening and an inner housing p... | 12/19/2000 |
| 6131696 | Multiple inlet muffler A compressed gas muffler that accommodates multiple sources and removes back-pressure to the source has a housing with a top, a bottom, and four sides. An inlet has a lip and an open center. The lip extends from the top of the housing. The open center ext... | 10/17/2000 |
| 6045422 | Wedge with angularly adjustable positions An exhaust processing system for a boat including an exhaust chamber having an exhaust opening in the rear bottom thereof, and a wedge plate is pivotally mounted at the forward end of the opening. Controls are provided to pivot the wedge to thereby change... | 04/04/2000 |
| 6042437 | Exhaust knock down spray An exhaust knockdown spray includes a scoop on the underside of a boat hull which picks up water when the boat is underway, and, through a conduit, directs the water to a spray nozzle at the rear of the hull where the water falls upon any exhaust coming o... | 03/28/2000 |
| 5979583 | Muffler for motorcycle A muffler is connected to a pair of exhaust pipes extending from each cylinder of a multi-cylinder engine. The muffler assures easier assembling work and provides independent exhaust sound for each cylinder. The muffler includes a forward and a rearward e... | 11/09/1999 |
| 5929398 | Muffler device A small-sized muffler having porous partition walls includes a first expansion chamber, a second expansion chamber, a third expansion chamber and a fourth expansion chamber. A first porous partition wall is longitudinally arranged within the third expansi... | 07/27/1999 |
| 5846107 | Marine engine noise suppressor An exhaust system in a boat for an internal combustion engine in the boat with the conventional round exhaust manifold of the engine connected by a rectangular cross sectional exhaust pipe to an exhaust chamber. Within the exhaust chamber is a vacuum wedg... | 12/08/1998 |
| 5775100 | Dual inlet muffler connection An exhaust system for use with the engine (10) of a vehicle. The exhaust system includes a pair of catalytic converters (18) connected to separate exhaust streams, with each catalytic converter (18) including an outlet pipe (22) extending therefrom. A dua... | 07/07/1998 |
| 5712455 | Dual entry plug muffler A muffler for exhaust systems that feed exhaust into both ends of the muffler can. Exhaust gas enters into the muffler can where it enters an exhaust gas conduit that has a center plug installed. Exhaust is fed into both ends of the exhaust gas conduit. T... | 01/27/1998 |
| 5608194 | Exhaust pipe structure for a motorcycle To provide a compact exhaust apparatus for allowing exhaust sounds of each cylinder to be heard. A muffler includes a tubular member the inside of which is divided into three independent expansion paths by partition plates. The partition plates extend in ... | 03/04/1997 |
| 5594217 | Exhaust muffler for small marine craft An exhaust muffler for small marine craft that can be located in the rear portion of the bilge and straddle the drive shaft and the shaft log. The muffler has a shell formed from sides, ends, top and bottom walls. The bottom wall is provided with a concav... | 01/14/1997 |
| 5588888 | Wet marine exhaust muffler A wet marine exhaust muffler comprises a housing, an inlet pipe and an outlet pipe. The housing includes end walls each transverse with respect to an imaginary plane and converging side walls connecting converging edges of the end walls such that the conv... | 12/31/1996 |
| 5519994 | Muffler with inlet pipe equalizer An arrangement for silencing the exhaust gases discharged from a multi-cylinder internal combustion engine, wherein the exhaust gas is discharged in first and second streams from separate exhaust gas manifolds on opposite sides of the engine and the two s... | 05/28/1996 |
| 5473891 | Three-piece stamp formed connector for achieving equal length exhaust pipes A connector is provided for joining two upstream exhaust pipes with a downstream exhaust pipe and for substantially offsetting any difference in length that may exist in the upstream exhaust pipes. The connector includes first and second external shells t... | 12/12/1995 |
