Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7766123 | Vehicle exhaust system An exhaust system for a vehicle, such as a motorcycle or other straddle-type vehicle, that achieves miniaturization while providing advantageous noise reduction characteristics. The exhaust system is associated with an engine of a vehicle and includes an exhaust pip... | 08/03/2010 |
| 7328586 | Repositionable attenuator A repositionable attenuator for a terminal unit in a heating, ventilation, and air conditioning system is disclosed. The attenuator is positionable between at least a first and a second position. This enables the attenuator to be attached to and shipped with the ter... | 02/12/2008 |
| 7293454 | Anti-aliasing acoustic filter in the presence of pulsating flow An exhaust flow measurement system uses a noise attenuation device to cancel exhaust gas pulsations at the harmonic frequency of a flow rate measurement transducer. ... | 11/13/2007 |
| 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 |
| 7216739 | Muffler for pneumatic hand tool A pneumatic tool (610) and a muffler assembly (600) therefor, for quieting the operation of the pneumatic tool, are disclosed. In one embodiment, the muffler assembly (600) is slidably disposed within the exhaust passage (616) and include... | 05/15/2007 |
| 7159692 | Silencer A silencer that comprises a casing, one or more pipes or passages leading a flow of gas to the casing and a device for leading gas from the casing. The silencer further has at least one internal chamber, one or more flow inlets to the chamber and one or more flow ou... | 01/09/2007 |
| 7100737 | Muffler for noise reduction A muffler assembly, comprising an outer muffler assembly comprising a plurality of fiberglass discs and a plurality of reactive plates, and an inner muffler assembly comprising a plurality of fiberglass discs and a plurality of reactive plates the inner muffler asse... | 09/05/2006 |
| 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 |
| 6935460 | Noise muffler for oxygen concentrator A noise muffler for the exhaust of waste gases from apparatus such as an oxygen concentrator, including a muffler core with an inlet to receive the waste gases and a plurality of bores in the core first to direct the waste gases through a filter material and a cap e... | 08/30/2005 |
| 6840348 | Exhaust muffler An exhaust muffler for an internal combustion engine included in a motorcycle includes a perforated inner pipe (32), an outer pipe (31) coaxially surrounding the inner pipe (32), and a glass wool mat (33) packed in a space between the inn... | 01/11/2005 |
| 6736238 | Air intake silencer A silencer for connection to the air intake of a machine such as a turbocharger compressor. The silencer comprises a housing containing a plurality of axially spaced annular noise attenuating baffles. Each baffle has an outer circumference and an inner circumference... | 05/18/2004 |
| 6672425 | Noise abatement module The current invention is device for lowering the air velocity and inherent noise of high-speed air released from a closed system, comprising a straight pipe module with an outer tube and a concentric inner tube creating an annular space therebetween. The ... | 01/06/2004 |
| 6533065 | Noise silencer and method for use with an ultrasonic meter A silencer for use with ultrasonic meters to reduce stray ultrasonic noise that could cause measurement inaccuracies. The silencer comprises a tubular body having at least two baffles spaced apart from one another. The baffles are preferably formed of an ... | 03/18/2003 |
| 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 |
| 6467570 | Spark arrester with spark filter An exhaust processor includes a housing formed to include an interior region and a partition or first spark arrester that partitions the interior region into chambers and includes a wool filter formed to include an opening. The wool filter is positioned t... | 10/22/2002 |
| 6415887 | Refractive wave muffler Within an exhaust duct are positioned a plurality of concentrically arranged, open ended, right cylinders supported axially within the exhaust duct, wherein each of the cylinders includes an inlet end and an exit end. The inlet ends are positioned in sequ... | 07/09/2002 |
| 6199658 | Multi-Fold side branch muffler A compact muffler has a straight through inner cylindrical casing surrounded by an outer cylindrical casing defining a closed ended sound attenuating chamber therebetween. Within the outer chamber a plurality of axially extending, radially overlying, cyli... | 03/13/2001 |
| 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 |
| 5962821 | Internal combustion engine noise reduction apparatus The present invention is a noise reduction apparatus for use in the exhaust system of an internal combustion engine which absorbs acoustical energy from the pressurized exhaust gases while minimizing restrictions on the exhaust gases as they flow therethr... | 10/05/1999 |
| 5957553 | Audiovisual equipment and casing thereof and method of producing the same A casing for audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to eas... | 09/28/1999 |
| 5952625 | Multi-fold side branch muffler A compact muffler has a straight through inner cylindrical casing surrounded by an outer cylindrical casing defining a closed ended sound attenuating chamber therebetween. Within the outer chamber a plurality of axially extending, radially overlying, cyli... | 09/14/1999 |
| 5661272 | Engine noise reduction apparatus The present invention is a noise reduction apparatus for use in the exhaust system of an internal combustion engine which absorbs acoustical energy from the pressurized exhaust gases while minimizing restrictions on the exhaust gases as they flow therethr... | 08/26/1997 |
| 5399817 | Muffler A muffler arrangement includes a muffler with an essentially cylindrical housing having a face end with a central entrance opening and at least one exit opening arranged other than centrally on the face end. Baffles are disposed within the housing, the ba... | 03/21/1995 |
| 5371331 | Modular muffler for motor vehicles A muffler for use on the exhaust system of the motor vehicle. The muffler has a central pipe which is surrounded by an outer pipe which leaves an annular space between the two. The outer pipe is open at both ends and the annular space is filled with a sou... | 12/06/1994 |
| 5350888 | Broad band low frequency passive muffler A sound absorbing muffler used to attenuate noise carried by the exhaust gases of an internal combustion engine includes a straight-through flow tube of cross-section having no baffles or flow reversals. The muffler utilizes both reactive and dissipative ... | 09/27/1994 |
| 5274201 | Noise muffler for an air blower The noise generated by onrushing air which is produced by an air blower for use in conjunction with pneumatic conveying equipment is substantially reduced by directing the air flow through an enclosed housing from an air inlet opening to an air outlet ope... | 12/28/1993 |
| 5266755 | Car silencer for absorbing sound and exhaust pollutants A car silencer includes an outer pipe having a front expansion chamber defined in a front portion of the outer pipe connected with a connecting tube which is connected to an engine manifold for directing waste gas as discharged from a car engine, an inner... | 11/30/1993 |
| 5253603 | Underwater vehicle muffler A muffler for use with an underwater vehicle. The muffler is mechanically attached to an exhaust tube or aft end of the underwater vehicle and has an hydrodynamic shape and perforated exterior that results in the production of less noise by the vehicle. L... | 10/19/1993 |
| 5227593 | Muffler assembly for engine Muffler assembly for an engine comprises an outer cylinder constituting a muffler body, an inner cylinder coaxially disposed in the outer cylinder, a connection cylinder disposed inside the inner cylinder having one end on an upstream side and another end... | 07/13/1993 |
| 5170020 | Rainproof exhaust pipe A vertical exhaust pipe having an inner pipe with an upper opening. An outer pipe is positioned around the inner pipe and has an end portion that extends beyond the upper opening in the inner pipe, said end portion defining an outlet through which exhaust... | 12/08/1992 |
| 5151254 | Exhaust gas cleaning device for internal combustion engine An exhaust gas cleaning device is disposed within an exhaust pipe connected to the exhaust port of an internal combustion engine. The exhaust gas cleaning device comprises an inner pipe disposed coaxially within the exhaust pipe with an annular space defi... | 09/29/1992 |
| 4877084 | Gas well discharge velocity dissipator Provided is a device for dissipating, safely and in an environmentally sound manner, a high pressure fluid discharge from a gas well. The device is locatable in an earthen pit and connectable to the end of a discharge conduit. There is an open-bottomed ho... | 10/31/1989 |
| 4751980 | Sound attenuation apparatus A sound attenuation apparatus which is to be connected to an airflow duct and is to receive the air from the duct. The sound attenuation apparatus includes a mass of plates located in a stacked arrangement with peripheral gaps being formed between the pla... | 06/21/1988 |
| 4617963 | Control valve with anticavitation trim A control valve includes a valve body with a fluid inlet and a fluid outlet. A valve seat is mounted within the valve body between the inlet and outlet. A valve plug is reciprocally mounted within the valve body to engage the valve seat. A plurality of va... | 10/21/1986 |
| 4595073 | Plug-type muffler section A plug section for a muffler, including an outer body and having an inlet pipe for introducing exhaust gas into the body. The inner end of the inlet pipe located within the body portion is closed off. Surrounding the inlet pipe is a conical baffle having ... | 06/17/1986 |
| 4367807 | Sound absorber for compressed-air operated apparatuses, in particular compressed air vibrators The sound absorber includes a main body (1), a housing component (2) attached thereon and a cap (3) threaded onto the main body. The compressed air exiting from the compressed-air vibrator flows from a first chamber (4) into a second chamber (5) provided ... | 01/11/1983 |
| 4318720 | Exhaust filter muffler A combined muffler and engine exhaust filter comprises a fixed outer shell and an inner shell. The inner shell is formed from two concentric perforated tubes held in fixed relationship to each other. Granulated or powdered filtering material fills the spa... | 03/09/1982 |
| 4241805 | High pressure gas vent noise control apparatus and method An apparatus and method is provided for venting high pressure gas to a lower pressure region with a minimum of noise. A high pressure vent valve controls egress from a high pressure gas source. In order to limit the generation of noise downstream of the v... | 12/30/1980 |
| 4184564 | Combination muffler and air filter A combination muffler and air filter is provided having a central tubular member with spaced longitudinally disposed elongated slots. A disposable canister on the central tubular member is removably held in position by retainer caps engaged on the ends of... | 01/22/1980 |
| 4136757 | Absorption muffler construction An absorption muffler for flowing gases and particularly for exhaust gases from internal combustion engines comprises a housing which is of oblong shape and has spaced apart semicylindrical short side walls, with long side walls on each side which are syn... | 01/30/1979 |
