Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7726444 | Exhaust system baffle apparatus An exhaust system baffle is provided comprising a tube and a plurality of radially extending flanges mounted in surrounding relation about the tube. Each flange includes a centrally positioned aperture and a slit that extends through the flange from the aperture to ... | 06/01/2010 |
| 7644804 | Sound attenuator A fluid pathway is provided with a flow controller in at least a portion of its length wherein the flow controller comprises an active surface capable of influencing the fluid flow through the fluid pathway, the configuration of the active surface conforming to at l... | 01/12/2010 |
| 7383919 | Rotatable propeller driven engine exhaust system An exhaust chamber system having a rotatable propeller type blade assembly at the entry to an expansion chamber which creates a vortex that swirls exhaust gas towards the outlet. The resultant action within the exhaust chamber aids in scavenging internal combustion ... | 06/10/2008 |
| 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 |
| 7380639 | Backpressure reducing exhaust system with stationary blade structure The present invention provides an exhaust chamber system, comprising a stationary propeller type blade assembly with a nose cone within or adjacent to an expansion chamber, to create a vortex that swirls exhaust gas towards the outlet. The resultant vacuum within th... | 06/03/2008 |
| 7374017 | Exhaust system baffling apparatus An exhaust system baffling apparatus is provided. The apparatus includes a tube with at least one end that is not open. The apparatus further includes a plurality of C-shaped flanges in surrounding relation about the tube. The outer edges of the flanges have a conto... | 05/20/2008 |
| 7357221 | Exhaust gas muffler An exhaust gas muffler is provided for an internal combustion engine, especially for an internal combustion engine in a manually-guided implement such as a power saw, a cut-off machine, or the like. The muffler has a housing having an inlet for exhaust gases and an ... | 04/15/2008 |
| 7350620 | Compact silencer There is disclosed a silencer for attenuating sound waves produced in a fluid that circulates through a fluid conveyer. The silencer comprises an expansion chamber that is in fluid communication with the fluid conveyer, and which carries sound waves there through; a... | 04/01/2008 |
| 7331422 | Vortex muffler A muffler includes an inner passage residing in an outer shell, and a stationary fan residing in the inner passage. The fan creates a vortex in a flow through the inner passage thus improving the flow and reducing the exhaust sound level. The inner passage includes ... | 02/19/2008 |
| 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 |
| 7303047 | Apparatus for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 12/04/2007 |
| 7303048 | Method for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 12/04/2007 |
| 7284638 | Loudspeaker low profile quarter wavelength transmission line and enclosure and method A speaker enclosure including a compact quarter wavelength transmission path in the shape of a closed spiral that expands radially outward from a centrally located loudspeaker mounting location. The height of the transmission path has a minimum height that is equal ... | 10/23/2007 |
| 7243757 | Exhaust muffler An exhaust muffler (1) invention includes an entry chamber (9), a resonator chamber (15), and a baffle chamber (23) positioned in serial order between an exhaust gas inlet (3) that lets exhaust gas into the entry chamber and an exh... | 07/17/2007 |
| 7117973 | Noise suppressor apparatus for a gas duct A sound damping device (4) for a tubular duct (2), particularly a gas transporting tract of an internal combustion engine (1) having a least one bypass channel (5) running parallel to a main duct (6) in a section of the duct (2 | 10/10/2006 |
| 7073626 | Engine exhaust muffler with guide vanes imparting a successively alternating spiral swirl gas flow A muffler has a housing (2) through which exhaust gas flows and which has at least one housing chamber (3, 5) and in which deflecting elements (13 to 16) serving to make the gas swirl are arranged spaced one behind another along a main ax... | 07/11/2006 |
| 7017707 | Herschel-Quincke tube for vehicle applications An HQ tube arrangement suitable for packaging within a vehicle may be designed by creating a mathematical model representing a tube arrangement having a first passageway and a second passageway fluidly connected to the first passageway at first and second junctions.... | 03/28/2006 |
| 7011180 | System for filtering ultrasonic noise within a fluid flow system A method is employed to attenuate ultrasonic noise propagating in a flow stream of a fluid flow system. In particular, the method attenuates the noise propagating between a noise source and a reference point in the flow stream (wherein the reference point and the no... | 03/14/2006 |
| 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 |
| 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 |
| 6796403 | Exhaust system baffling apparatus An exhaust system baffling apparatus is provided. The apparatus includes a tube with at least one end that is not open. The apparatus further includes a plurality of C-shaped flanges in surrounding relation about the tube. The outer edges of the flanges have a conto... | 09/28/2004 |
| 6588545 | Muffler for internal combustion engine A muffler for an internal combustion engine, capable of sufficiently attenuating exhaust sound and preventing power output from being reduced by allowing exhaust gas to flow without a hitch and generating vortices. The muffler comprises a casing, a vortex... | 07/08/2003 |
| 6554100 | Vehicle muffler system A submuffler for a vehicle muffler system which comprises a housing, a pressure-reducing conduit disposed within said housing, said pressure-reducing conduit containing a plurality of apertures disposed on the surface thereof, an eddy-generating member di... | 04/29/2003 |
| 6510921 | Muffler/exhaust extractor A muffler has an elongated generally cylindrical casing having inlet and outlet ends, an elongated generally frustroconical baffle in the casing adjacent the inlet end with the smaller diameter portion being spaced from the inlet end. The peripheral wall ... | 01/28/2003 |
| 6385967 | Exhaust pipe for motor vehicle muffler An exhaust pipe for motor vehicle muffler having a plurality of muffling holes arranged over the periphery, a partially perforated conical tube suspended on the inside and axially extended from the exhaust gas input end thereof for accelerating exhaust ga... | 05/14/2002 |
| 6364055 | Acoustically non-resonant pipe A non-resonant pipe assembly comprised of two acoustical pipe paths in phase opposition. One pipe path by its physical presence will act as a half wave. The other pipe path is longer than the first by an odd integer multiple of the first path.... | 04/02/2002 |
| 6343673 | Turbine exhaust structure for vehicle A turbine exhaust structure is provided for a vehicle which includes an exhaust tail pipe having an inner wall defining a screw hole. The turbine exhaust structure includes a turbine exhaust device secured in the inner wall of the exhaust tail pipe, and a... | 02/05/2002 |
| 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 |
| 6253873 | Gas guide element with sound-absorbent walls for blocking and damping noise spreading from it into main conduits A gas guide element with sound absorbent walls for blocking or damping noise spreading into main conduits, the gas guide element comprising a guide element body including a flexible sound absorbent inner hose resistant to mechanical, chemical and caloric ... | 07/03/2001 |
| 6213251 | Self-tuning exhaust muffler An exhaust muffler for a motor vehicle includes a louver tube having an intake end and an exhaust end. An outer tube, consisting of a frustoconical portion and a cylindrical portion, is concentrically arranged around the louver tube. A plurality of louver... | 04/10/2001 |
| 6167699 | Secondary air injection system for an internal combustion engine A secondary air injection system for reducing the hydrocarbon emissions of an internal combustion engine that is provided with an air pump supplying air to the exhaust manifold of the engine through a check valve assembly and an elastomeric hose character... | 01/02/2001 |
| 6089348 | Blower noise silencer A blower noise silencer comprises both an air turbulence stage and a noise absorption stage. The air turbulence stage includes a tubular screen enclosing a spiral vane wrapping around a central bore running through the air turbulence stage. The screen is ... | 07/18/2000 |
| 5971097 | Muffler for motor vehicles The present invention relates to a muffler used in a motor vehicle for cooling the engine exhaust gases. The muffler has an internal tubular member defining an internal chamber and a middle tubular member concentric in relation to and supported on the int... | 10/26/1999 |
| 5872342 | Free rotor muffler A free rotor is mounted to spin freely in a conduit network that is acoustically coupled to a noise source through a working fluid that flows through the conduit network. The free rotor muffles the acoustic perturbations travelling through the conduit net... | 02/16/1999 |
| 5824972 | Acoustic muffler A muffler for reducing acoustic noise contained in a gas flow, such as created by internal combustion engines, air compressors, and blower manifolds. The muffler consists of a conventional sheet metal casing which has an inlet and an outlet at opposite en... | 10/20/1998 |
| 5756944 | Filter muffler A circular-cylindrical filter muffler includes damping elements (3) arranged with their damping surfaces (11, 12) parallel to the central axis (13) of the filter muffler housing (2), which is cast as a monobloc. The damping elements are arranged in groove... | 05/26/1998 |
| 5558492 | Paint sprayer with inlet silencer A silencer for the primary air intake port of an air compressor which includes (a) a housing defining a cylindrical chamber with an inlet orifice at one end and an outlet orifice at the other and (b) a baffle including (i) a substantially cylindrically sh... | 09/24/1996 |
| 5423395 | Quieted air compressor A silencer for the primary air intake port of an air compressor which includes (a) a housing defining a cylindrical chamber with an inlet orifice at one end and an outlet orifice at the other and (b) a baffle including (i) a substantially cylindrically sh... | 06/13/1995 |
| 5248858 | Automotive muffler and dust catcher assembly An automotive muffler and dust catcher assembly comprising a muffler attached to a dust catcher, the muffler having an intake pipe for guiding a motor vehicle's exhaust emission into the dust catcher, and an outlet pipe for exhaust of intake gas, wherein ... | 09/28/1993 |
| 5145026 | Water faucet silencer apparatus An apparatus is set forth to limit differential pressure during opening of the water faucet, wherein the apparatus includes a housing with a series of spaced parallel diffuser plates mounting a diffuser medium therebetween, wherein the diffuser plates dir... | 09/08/1992 |
