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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7559406 | Acoustic fluid machine In an acoustic fluid machine, an acoustic resonator gradually reduces in diameter towards the top on which a valve device is provided to suck a gas into the resonator. The gas is compressed in the resonator by a circular-plate piston at the lower end of the resonato... | 07/14/2009 |
| 7487858 | Acoustic fluid machine In an acoustic resonator, an actuator allows a piston to reciprocate axially at very small amplitude at high speed. Owing to pressure fluctuation in the acoustic resonator involved by reciprocal motion of the piston, fluid is sucked into and discharged from the acou... | 02/10/2009 |
| 7353909 | Acoustic fluid machine A piston is reciprocated axially at high speed at very small amplitude by an actuator in the larger-diameter base of an acoustic resonator. According to pressure fluctuation in the acoustic resonator involved by reciprocal motion of the piston, fluid is sucked into ... | 04/08/2008 |
| 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 |
| 7316291 | Suction muffler for a hermetic refrigerant compressor The invention concerns a suction muffler for a hermetic refrigerant compressor with a housing having an inlet and an outlet and limiting at least one muffling chamber, and a gas supply channel located in the muffling chamber between the inlet and the outlet. It is e... | 01/08/2008 |
| 7316109 | Lobed exhaust diffuser apparatus, system, and method A lobed exhaust diffuser apparatus, system, and method configured to cool exhaust gases from an internal combustion engine comprises a diffuser having a proximal end, configured to receive exhaust gases from the engine, and a distal end, configured to expel the exha... | 01/08/2008 |
| 7303046 | 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 |
| 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 |
| 7299894 | Acoustic fluid machine An acoustic fluid machine includes an acoustic resonator, a valve device, a piston, and an actuator. The acoustic resonator has a larger-diameter base and a smaller-diameter upper end. The valve device is provided on the upper end of the acoustic resonator and has a... | 11/27/2007 |
| 7252178 | Acoustic fluid machine An acoustic fluid machine such as an air compressor comprises an acoustic resonator, a valve device and a piston. Air is sucked into the resonator through the valve device at one end of the resonator. The piston at the other end of the resonator is reciprocated by a... | 08/07/2007 |
| 7156202 | Method and apparatus for venting exhaust gas from an engine A muffler for coupling to an exhaust port of an internal combustion engine. The muffler includes a housing having an exhaust inlet configured to receive exhaust gas from the engine, at least one internal expansion chamber and an outlet opening. The muffler further i... | 01/02/2007 |
| 7147082 | Suction muffler for a reciprocating hermetic compressor A suction muffler for a reciprocating hermetic compressor, comprising a hollow body (10) provided with a gas inlet and a gas outlet (12, 14), which are respectively in fluid communication with the gas supply to the compressor and with a suction side th... | 12/12/2006 |
| 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 |
| 6978605 | Exhaust emission control system for engine In an exhaust emission control system for an engine, comprising an exhaust emission control catalyst disposed in an exhaust muffler whose inside is divided into a plurality of chambers, at least a portion of the inside of the exhaust muffler is divided into a first ... | 12/27/2005 |
| 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 |
| 6910550 | Muffler arrangement for an internal combustion engine A muffler arrangement includes an exhaust-gas muffler, which is subdivided into an inlet space and an outlet space. An exhaust-gas stub of an internal combustion engine opens into the inlet space. Exhaust gas is conducted from the outlet space into an air channel vi... | 06/28/2005 |
| 6845843 | Suction muffler for a refrigerating machine The invention concerns a suction muffler for a refrigerating machine with a housing, in which at least one chamber is arranged and which has an inlet opening (7), an outlet opening and an oil discharge opening. It is endeavoured to avoid that too much ... | 01/25/2005 |
| 6715582 | Suction muffler The invention relates to a suction muffler for a hermetically enclosed compressor, with a housing having a first part with an outlet channel and a second part with an inlet channel, flow conducting means being arranged between the outlet channel and the inlet channe... | 04/06/2004 |
| 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 |
| 6591939 | Marine engine silencer A silencer is disclosed that reduces the acoustic energy of a fluid mixture of a liquid coolant and of exhaust gas from an engine. The engine may be a marine engine. The silencer according to this aspect includes a receiving chamber that receives the flui... | 07/15/2003 |
| 6385968 | Exhaust discharge system with low IR signature The invention concerns an arrangement for a discharge system for combustion gases from a motor-driven vehicle which gives the vehicle a low IR signature. According to the invention, the gas outflow channel (28), at least in an area of the channel adjacent... | 05/14/2002 |
| 6164066 | Muffler for internal combustion engine A muffler for an internal combustion engine has a vertically elongated expansion chamber into which an exhaust gas from the exhaust port of internal combustion engine is introduced. The expansion chamber is separated level-wise into a first expansion cham... | 12/26/2000 |
| 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 |
| 5902971 | Muffler for internal combustion engine A muffler for a two-stroke internal combustion engine includes an expansion chamber into which exhaust gas ejected from the exhaust port of the engine is introduced. An air-supplying device is adapted to supply outside air to the expansion chamber. The ai... | 05/11/1999 |
| 5887424 | Exhaust apparatus for engine An exhaust apparatus for an engine is provided, which is capable of efficiently sucking in secondary air for a catalyst by utilizing an ejector (entraining) effect caused by the exhaust gases and which has a simple and inexpensive structure. Exhaust gases... | 03/30/1999 |
| 5857327 | Muffler for an internal combustion engine A muffler for an internal combustion engine has an expansion chamber (31, 32) into which exhaust gas from the engine is introduced. The expansion chamber has a double wall (32A), with an inner panel (42) of the double wall (32A) having exhaust gas dischar... | 01/12/1999 |
| 5738184 | Muffler for a two-stroke engine A muffler for a two-stroke internal combustion engine has an expansion chamber into which a rush of exhaust gas is introduced from the engine. In the vicinity of an exhaust gas inlet from the engine into the expansion chamber, the muffler has an external ... | 04/14/1998 |
| 5431013 | Engine exhaust apparatus An engine exhaust apparatus comprises a sound suppressing section for lowering the exhaust noise level as an exhaust gas discharged from the exhaust port passes through it. The exhaust apparatus is provided with an ejector section for introducing secondar... | 07/11/1995 |
| 5304748 | Methods and apparatuses for muffling power plant steam exhaust Methods and apparatuses for muffling steam exhausted from a power plant, in one aspect, the method including flowing the steam into and through a submerged hollow pipe having a plurality of holes spaced apart along it and one or more water eduction tubes ... | 04/19/1994 |
| 5284018 | Internal combustion engine with exhaust turbine An internal combustion engine according to the present invention is comprised of a conduit means that directs the flow of exhaust from an internal combustion engine to a relatively low speed turbine connected to a generator. The conduit means also acts as... | 02/08/1994 |
| 5174113 | Exhaust outlet with venturi An exhaust outlet with venturi is disclosed, comprising an upstream portion (18) in the form of a venturi, defined by upstream walls (16) converging at an open angle and connected, in a narrowed portion (15) to downstream walls (17) diverging at a more re... | 12/29/1992 |
| 5162620 | Dual flow turbine engine muffler An elongate exhaust gas muffler for a turbine engine includes a foraminous central exhaust duct which is circumscribed along its length by a plurality of tuned dissipative and reactive noise attenuation chambers. At an inlet end of the muffler an annular ... | 11/10/1992 |
| 5058704 | Turbo jet muffler An improved muffler including a body 2 with an exhaust inlet 3 in the form of a porous pipe enclosed in s second porous pipe 31 for diffusing exhaust gases into the interior of body 2. A pair of pipes 5 introduce ambient air into the discharge region of t... | 10/22/1991 |
| 4964383 | Water-cooled type internal combustion engine for farming motor vehicle A water-cooled type internal combustion engine for a farming motor vehicle has a muffler arranged within the space on the lateral side of an engine body disposed in the fore and rear direction of the farming motor vehicle. An exhaust gas dilution pipe is ... | 10/23/1990 |
| 4938309 | Built-in vacuum cleaning system with improved acoustic damping design An improved design for the central power and suction unit of built-in vacuum cleaning systems, which improved design provides significant acoustic damping to substantially reduce the noise level generated from the central power and suction unit. The desig... | 07/03/1990 |
| 4907546 | Air-cooled type cooling system for engine working machine assembly In an air-cooled type cooling system for an engine working machine assembly in which a working machine such as a generator, a compressor and the like is adapted to be driven by an internal combustion engine, there are provided an air-cooled engine, a work... | 03/13/1990 |
| 4890690 | Exhaust gas muffler for a two-stroke engine The invention is directed to an exhaust gas muffler for a two-cycle engine, especially for a handheld portable tool, such as a chain saw. In exhaust gas mufflers equipped with a catalyzer, the formation of flame from the fuel-containing exhaust gases exit... | 01/02/1990 |
| 4867270 | Exhaust gas muffler for a two-stroke engine The invention relates to an exhaust gas muffler for a two-stroke engine of a portable handheld tool such as a chain saw. The exhaust gas muffler includes a catalyzer wherein high exhaust gas temperatures are developed because of the exothermal reaction wh... | 09/19/1989 |
| 4846301 | Silencer The silencer according to the invention contains two chambers (10,11) separated by a partition wall (14) and includes also a guide plate (25) guiding cooling air from a fan (27) through a channel (26) in which recesses (23) from one chamber terminate. By ... | 07/11/1989 |
