Expansion Chamber Type Patents (Class 181/269)
  • Patent number: 11242783
    Abstract: A sound deflecting muffler for deflecting and absorbing sound waves associated with exhaust gases of an internal combustion engine includes a casing having a muffler body defining an interior area and defining an inlet opening operatively connected to the internal combustion engine for receiving exhaust gases into the interior area and defining an outlet opening in communication with the interior area for directing the exhaust gases downstream from the interior area. The casing includes a pair of sound baffles that define a flow path for the exhaust gases flowing between the inlet and outlet of the muffler body, each sound baffle being perforated and having an arcuate configuration such that the flow path narrows at a midpoint. A first sound deflector is positioned in the flow path proximate the inlet end so as to deflect a portion of the exhaust gases toward the pair of sound baffles.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: February 8, 2022
    Inventor: Terrance Chen
  • Patent number: 11220949
    Abstract: An exhaust silencer device which is interposed in an exhaust passage in a vehicle to reduce exhaust noise comprises a sub-muffler which is interposed in the exhaust passage and has an expansion chamber formed therein; an inlet pipe which is airtightly inserted through an inlet opening of the sub-muffler; and an outlet pipe which is airtightly inserted through an outlet opening of the sub-muffler, wherein the inlet pipe and the outlet pipe are formed with openings (small apertures, non-joined portions) only in their upper half area and their lower half area is sealed without having the openings.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: January 11, 2022
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, FUTABA INDUSTRIAL CO., LTD.
    Inventors: Taiki Teramoto, Takato Ishihata, Takehiro Miura, Akira Yamamoto
  • Patent number: 10823122
    Abstract: A silencing device includes an intake air pipe, a silencer, and a heater. The intake air pipe communicates with a supercharging device configured to supercharge intake air to be sucked into an engine. The intake air pipe is configured to introduce the intake air into the supercharging device. The silencer is disposed in the intake air pipe, and configured to silence air flow noise. The heater is disposed in the intake air pipe, and configured to heat the intake air introduced through the intake air pipe.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: November 3, 2020
    Assignee: SUBARU CORPORATION
    Inventors: Takashi Mori, Kyohei Yamamoto
  • Patent number: 9849424
    Abstract: Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: December 26, 2017
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Debbie Davidson, Duncan Engeham, Piotr Uban, David Elsey, Z. Gerald Liu, Kenneth Pawson, Paul Smith, Ken Capel, Andrew Critchley, David Sarcona, James Goss
  • Patent number: 9696732
    Abstract: A valve device includes a valve seat forming member, a case, a first O-ring, and a second O-ring. The valve seat forming member is fit into a passage defining and forms a valve seat. The case houses an electromagnetic solenoid and is connected to the passage defining member. The first O-ring is interposed between an inner circumferential surface of the passage defining member and an outer circumferential surface of the valve seat forming member. The first O-ring prohibits the fluid from flowing through a space between the passage defining member and the valve seat forming member when the main valve body seats on the valve seat. The second O-ring is interposed between the case and the passage defining member. The second O-ring prohibits the fluid from flowing from the passage to an outside of the passage defining member.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: July 4, 2017
    Assignee: DENSO CORPORATION
    Inventors: Hiroyuki Harada, Yuichiro Miura, Hirofumi Onodera, Kimio Uchida
  • Patent number: 9488079
    Abstract: A muffler for an exhaust system of a gas combustion engine, which comprises a muffler body (14) connected to an exhaust pipe inlet (10a), an exhaust pipe outlet (11a) to the tailpipe connected to the muffler body (14), and adjacent baffles (23, 24) within the muffler body (14), characterized in that the exhaust pipe inlet (10a), the exhaust pipe outlet (11a) and the adjacent baffles (23, 24) are in line without significant restriction to gas exhaust flow and having baffle openings (21, 22) and baffle louver openings (18b, 19b) to the central muffler chamber (17), whereby the central muffler chamber route (17) is generally a straight line from the exhaust inlet pipe (10a) to the exhaust pipe outlet (11a).
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: November 8, 2016
    Assignee: Black Widow Performance, Inc.
    Inventor: William Lee Bartlett
  • Patent number: 9399936
    Abstract: An exhaust apparatus includes: an inner tube including therein an exhaust passage and also including a peripheral wall portion on which a plurality of opening portions communicating with the exhaust passage are formed; an outer tube accommodating the inner tube, an internal space being formed between the outer tube and an outer periphery of the inner tube; and a flow rectifying member arranged at a region inside the inner tube, having a spiral shape in an axial direction of the inner tube, and configured to rectify an exhaust gas flowing through the exhaust passage.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: July 26, 2016
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Yuji Takasugi, Tetsuya Masuda, Yoshihiko Inagaki
  • Patent number: 9046316
    Abstract: A suppressor for a firearm having dynamic baffles that move together during the discharge of a firearm. A dynamic baffle assembly may be positioned within a housing that may be connected to a barrel of a firearm. A projectile path passes between dynamic baffles of positioned within the housing. The dynamic baffles include engaging faces that are adapted to permit the passage of the projectile through the dynamic baffles. The gas created from the discharge of ammunition impinges upon the engaging faces causing the movement of the dynamic baffles towards each other. The movement of the dynamic baffles may slow the flow of gases created by the discharge of ammunition and reduce the noise created during the discharge of a firearm.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: June 2, 2015
    Assignee: GEMINI TECHNOLOGIES
    Inventor: Nolan Blake Young
  • Publication number: 20150101886
    Abstract: A synthetic jet muffler includes an exit end, a propagation path for conducting a first sound wave emitted by a synthetic jet generator to the exit end, and a shroud for conducting a second sound wave emitted from the synthetic jet generator in a direction opposite to the first sound wave to the exit end, wherein the shroud is disposed so that the first and second sound waves travel different distances to effect noise cancellation at the exit end.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 16, 2015
    Applicant: The Boeing Company
    Inventor: Steven F. Griffin
  • Patent number: 8985271
    Abstract: An exhaust muffler for a vehicle includes a muffler body that is connected to an exhaust pipe and that includes therein a plurality of expansion chambers. The muffler body has an upstream side cover that has an exhaust entrance connected to the exhaust pipe and that closes an upstream side opening of the muffler body, and a communication pipe that couples one of the plurality of expansion chambers positioned in a most upstream side part of an exhaust flow path and the exhaust entrance to each other. The exhaust pipe and the communication pipe are integrally joined to a peripheral portion of the exhaust entrance by a common welding bead.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: March 24, 2015
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Atsuya Yoshida
  • Patent number: 8855329
    Abstract: An active noise control (ANC) system may be implemented to both sides of a fan, such that both directions of the noise emitting are treated to reduce the overall noise. The impact on airflow is minimal, and the technique is very effective in a broad range of low frequencies. Passive sound-absorbing materials may be included for attenuation of high frequencies. The resulting quiet fan produces a low level of noise compared to any other device based on fan, which produces the same capacity of airflow. The quiet fan may be incorporated in any mechanical system which requires airflow induction such as: computers, air conditioners, machines, and more.
    Type: Grant
    Filed: January 20, 2008
    Date of Patent: October 7, 2014
    Assignee: Silentium Ltd.
    Inventors: Alon Slapak, Tzvika Fridman, Ofira Rubin
  • Patent number: 8844276
    Abstract: An exhaust muffler disposed in proximity to a cylinder of a general-purpose engine is provided, in which an exhaust muffler for a general-purpose engine is formed from a muffler main body connected to a cylinder of a general-purpose engine via an exhaust pipe and disposed adjacent to the cylinder, a partition member that divides the interior of the muffler main body into a first muffler chamber communicating with the exhaust pipe and a second muffler chamber communicating with an exhaust outlet of the muffler main body, and an exhaust cooling pipe exposed outside the muffler main body while providing communication between the first muffler chamber and the second muffler chamber. This enables exhaust gas to be cooled effectively by passing though the exhaust cooling pipe when moving from the first muffler chamber to the second muffler chamber, thus enhancing muffling by reducing the pressure of the exhaust gas.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: September 30, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shoji Kawase, Atsushi Maruyama, Toru Kawai
  • Patent number: 8783024
    Abstract: An exhaust chamber (34) for a motorcycle is disposed at a location upstream of a muffler (36) of an exhaust passage (38) leading from a combustion engine (E). The exhaust chamber (34) includes a chamber body (40) having expansion compartments (41, 42, 43) defined therein, a chamber outlet pipe (46) having an outlet passage defined therein for discharging the exhaust gases (G) from the chamber body (40), and an exhaust control valve (72) disposed in the chamber outlet pipe (46) for adjusting the sectional area of the outlet passage inside the chamber outlet pipe (46).
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: July 22, 2014
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Masashi Ono, Ichiro Tanaka, Yoshihito Uchino
  • Patent number: 8770169
    Abstract: Provided is a cover member (7) such as chain cover member for engines, configured to reduce significantly its own vibrations and noises generated or transmitted therefrom compared to other conventional cover members. On its central portion, the cover member (7) of the present invention is provided with circular compartments (17) each defined by a concave surface facing outward and a convex surface facing inward. At least, the concave surfaces facing outward jointly define a continuous curved surface. Therefore, the flat surfaces (flat portions) on the cover member (7) decrease, thereby reducing sound emission, and thus noises from the cover member (7). In addition, when the cover member (7) of the present invention has at least three circular compartments (17), in each three circular compartments (17) adjoining to each other, the three circular compartments (17) are arranged in a triangular pattern, and each one of them circumscribe the other two circular compartments (17).
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: July 8, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventor: Yoshiaki Koyama
  • Patent number: 8739923
    Abstract: A muffler for a vehicle exhaust system includes a first outer shell, a second outer shell that cooperates with the first outer shell to define a muffler interior cavity, and at least one porous partition that separates the muffler interior cavity into at least first and second sub-cavities. In one example, the porous partition is integrally molded with at least one of the first and second outer shells. In one example, an exhaust tube extends through the first sub-cavity and acoustic fiber material is located within the first sub-cavity.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: June 3, 2014
    Assignee: Faurecia Emmissions Control Technologies
    Inventor: Joseph E. Callahan
  • Patent number: 8701824
    Abstract: The inside of a muffler main body formed from an outer plate into the shape of a cylinder is divided into an upstream-side expansion chamber and downstream-side expansion chambers by partition walls. A catalyst is contained in the upstream-side expansion chamber having a larger volume, and a cylinder-shaped reinforcement member is attached to an inner surface of the outer plate of the upstream-side expansion chamber.
    Type: Grant
    Filed: August 27, 2012
    Date of Patent: April 22, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yoshitaka Hayama, Kenichiro Nakamura
  • Patent number: 8601713
    Abstract: The present invention relates to a silent hair dryer (3) comprising at least one casing (30) comprising an inlet end (33) and an outlet end (31) and enclosing at least one turbine (T) sucking in air via at least one admission orifice (330) upstream of the turbine (T) and expelling it downstream via at least one outlet orifice (310), and generating determined sound frequencies, characterized in that it comprises a silencer comprising at least one chamber (10) upstream of the admission orifice (330) and comprising an inlet orifice (110) for aspiration of air upstream of the chamber (10), the diameter of the chamber (10) being greater than the diameter of the admission orifice (330) and the diameter of the inlet orifice (110), the length (L) and the diameter (Dc) of the chamber (10) being of such a size so as to define a volume tuned as a function of said determined sound frequencies.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: December 10, 2013
    Assignee: Velecta Paramount S.A.
    Inventors: Christophe Gaillard, Michel Guillosson, Roland Quessard
  • Patent number: 8572949
    Abstract: A flow guide (8) is provided for an exhaust system (3) of an internal combustion engine (1), especially in a motor vehicle. The flow guide (8) has at least one U-shaped guide plate body (13), which can be mounted with its U-base (14) on a pipe section (4?) of the exhaust system (3) and whose U-legs (15) form in the mounted state a flow guide plate (15) each. The flow guide plate cooperates with an exhaust gas stream (19) being guided in the pipe section (4?) during the operation of the exhaust system (3).
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: November 5, 2013
    Assignee: Eberspächer Exhaust Technology GmbH & Co. KG
    Inventor: Georg Wirth
  • Patent number: 8381870
    Abstract: 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 least one logarithmic curve conforming to the Golden Section.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: February 26, 2013
    Assignee: Pax Scientific, Inc.
    Inventor: Jayden David Harman
  • Patent number: 8359835
    Abstract: An exhaust device for a vehicle, such as a motorcycle or scooter, includes an exhaust pipe and a muffler. A first end portion of the exhaust pipe is connectable to an engine of the vehicle. A second end portion of the exhaust pipe is located within the muffler. A secondary air induction pipe supplies air to the exhaust pipe and is connected to a portion of the exhaust pipe located within the muffler. Furthermore, at least the portion of the exhaust pipe to which the secondary air induction pipe is connected is linear. A purification tube member for purifying exhaust gas forms a portion of the second end portion of the exhaust pipe.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: January 29, 2013
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Hidehiro Nishimura, Hiromi Suzuki, Manabu Shimoishi
  • Patent number: 8307944
    Abstract: A muffler (1) for an exhaust system (2) of an internal combustion engine, especially of a motor vehicle, with a muffler housing (3), which encloses a housing interior space (5), and with at least one exhaust gas-carrying hollow body (4) with two half shells in a half shell construction. The hollow body is arranged in the housing interior space (5). The two half shells (14, 15) of the hollow body (4) are fastened to one another in the area of a separating plane (16). The assembly of the muffler (1) or of the hollow body (4) can be simplified if the two half shells (14, 15) are fastened to one another by fastening elements (17, 18), which are formed directly on the half shells (14, 15).
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 13, 2012
    Assignee: J. Eberspächer GmbH & Co. KG
    Inventors: Thomas Reinheimer, Michael Schmidt
  • Patent number: 8256132
    Abstract: A silent hair dryer and a silencer for a hair dryer includes at least one casing with an inlet end and an outlet end and enclosing at least one turbine sucking in air via at least one admission orifice upstream of the turbine and expelling it downstream via at least one outlet orifice. The silent hair dryer includes at least one chamber upstream of the admission orifice and an inlet orifice for aspiration of air upstream of the chamber; the diameter of the chamber being greater than the diameter of the admission orifice and the diameter of the inlet orifice, the length and the diameter of the chamber being of such a size so as to define a volume turned as a function of the sound frequencies to be attenuated by the silencer.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: September 4, 2012
    Assignee: Velecta Paramount
    Inventors: Christophe Gaillard, Michel Guillosson, Roland Quessard
  • Patent number: 8215450
    Abstract: An exhaust muffler device for an internal combustion engine includes an outer housing which defines a sealed chamber and which is connected to opposite inlet and outlet pipes, and an initial expansion subchamber and a pre-outlet subchamber disposed in the sealed chamber. The exhaust gas enters the initial expansion subchamber and mainly flows to a tubular passage in the pre-outlet subchamber to be exhausted through the outlet pipe. Portion of the exhaust gas flows into the sealed chamber and re-enters into a rejoining region of the tubular passage to be entrained in the main stream, thereby attenuating noise of the engine with minimal reduction of engine performance.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: July 10, 2012
    Inventor: Chih-Chien Chien
  • Patent number: 8205716
    Abstract: An exhaust muffler (1) for an exhaust system of an internal combustion engine, especially of a motor vehicle, includes two front-side end panels (2) facing away from each other, a circumferential jacket (3) closed in the circumferential direction, at least one exhaust muffler insert (4), with at least one inlet pipe (5) and with at least one outlet pipe (6). At least one of the pipes (5, 6) extends through the jacket (3) into the interior (8) of the exhaust muffler and is fastened to the jacket (3). Manufacture can be simplified if the pipe (5, 6) extending through the jacket (3) has a cone (10) at its inner end, if the exhaust muffler insert (4) has a countercone (11) and if the cone (10) meshes with the countercone (11).
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: June 26, 2012
    Assignee: J. Eberspächer GmbH & Co. KG
    Inventor: Georg Wirth
  • Patent number: 8162103
    Abstract: This silencer (10) for a motor vehicle exhaust line of the type comprising: a casing (12) internally delimiting an exhaust volume; an exhaust gas inlet (16) opening into the exhaust volume; and an exhaust gas outlet pipe (18) communicating with the exhaust volume and having an outlet orifice (30) to the outside of the silencer (10), is characterized in that the outlet pipe (18) comprises a section (32) pressed against the casing (12), the casing (12) having at least one perforation placing the pressed section (32) in communication with the exhaust volume.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: April 24, 2012
    Assignee: Faurecia Systemes d'Echappement
    Inventors: Edouard Barrieu, David Gafforelli
  • Publication number: 20110297479
    Abstract: A muffler for attenuating acoustic noise in a gas flow that includes a casing having a substantially-rectangular cross-section with an inlet opening in an inlet end and an outlet opening in an outlet end, so that a gas flow containing acoustic noise passes from the inlet opening to the outlet opening. The muffler also includes a V-shaped sound diffuser disposed within the casing and spanning the distance between opposing top and bottom walls of the casing. The sound diffuser comprises a pair of elongate leg plates having base ends attached to the outlet end on opposite sides of the outlet opening, and tip ends merged into an apex that is aligned with the inlet opening. Each leg plate has a plurality of apertures formed therein, and the apex splits the inlet gas flow into two side flows, with each side flow passing through the plurality of apertures in one of the leg plates to reach the outlet opening.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 8, 2011
    Inventor: Boyd L. Butler
  • Patent number: 8025123
    Abstract: The invention obtains a muffler structure for a vehicle which can suppress an emission sound. In a muffler shell for a muffler for a vehicle, there are formed a peripheral joint in which an upper shell and a lower shell corresponding to a plurality of shell structure portions are joined in respective peripheral joint flanges and, and an inter-isolation chamber joint in which the upper shell and the lower shell are joined in inter-isolation chamber joint flanges and in such a manner as to partition a space positioned in an inner side of the peripheral joint into a plurality of isolation chambers and arranged in parallel in a gas flow direction.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: September 27, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomoki Mabuchi
  • Publication number: 20110192677
    Abstract: An exhaust muffler device for an internal combustion engine includes an outer housing which defines a sealed chamber and which is connected to opposite inlet and outlet pipes, and an initial expansion subchamber and a pre-outlet subchamber disposed in the sealed chamber. The exhaust gas enters the initial expansion subchamber and mainly flows to a tubular passage in the pre-outlet subchamber to be exhausted through the outlet pipe. Portion of the exhaust gas flows into the sealed chamber and re-enters into a rejoining region of the tubular passage to be entrained in the main stream, thereby attenuating noise of the engine with minimal reduction of engine performance.
    Type: Application
    Filed: February 2, 2011
    Publication date: August 11, 2011
    Inventor: Chih-Chien CHIEN
  • Patent number: 7971682
    Abstract: An exhaust device for an engine cam include a flow rectifying device for rectifying a flow of an exhaust gas. The flow rectifying device is disposed in an upstream end of an inner pipe, and comprises protrusions projecting inwardly. The exhaust gas engaging the flow rectifying device has passed through a curved portion of the inner pipe. The inner pipe also includes a muffler having a plurality of vent holes disposed in an inner portion thereof, and an outer pipe surrounding the inner pipe, defining an angular chamber therebetween.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: July 5, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yusuke Inoue, Shigesato Nakamura
  • Patent number: 7942238
    Abstract: A marine muffler comprises an elongate cylindrical housing having an inlet and an outlet and defining an internal volume partitioned, by an angularly disposed internal baffle, into a lower chamber in communication with the inlet and an upper chamber in communication with the outlet. A vertically disposed duct is insertably secured to the baffle to allow exhaust gas and exhaust cooling water to flow from the lower inlet chamber to upper outlet chamber. The exhaust duct may preferably be further adapted with internal structure forming a plurality of individual flow conduits or passages. The duct is preferably positioned such that a plurality of flow passage inlets are positioned in proximity to the lower cylindrical housing wall, with flow passage outlets positioned in proximity to the upper housing wall. The lower duct wall may further be adapted with sidewall apertures for improving exhaust flow dynamics therethrough.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: May 17, 2011
    Inventors: Woodrow Woods, Darrin Woods, Craig McLeod
  • Patent number: 7942240
    Abstract: A silencer for an internal combustion engine includes a silencer housing formed by a pair of clamped housing members each having a substantially identical configuration relative to one another. The silencer housing has an intake port formed at a first end and an exhaust port formed at a second, opposite end. At least one separator is received in the silencer housing between and spaced apart from the first end and the second end. The at least one separator extends transversely across the silencer housing relative to a longitudinal length of the silencer housing.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: May 17, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventor: Douglas M. Olsen
  • Patent number: 7866442
    Abstract: A muffler that inhibits reduction in engine performance and reduces exhaust noise volume includes a front chamber and an expansion chamber with a partition therebetween. A conduit passes through the expansion chamber. An upstream end of the conduit passes through the partition and opens in the front chamber. A partition wall is provided in a central section of the conduit. An outflow section upstream from the partition wall has a side surface in which outflow holes are formed that allow exhaust gas to flow out to the expansion chamber. An inflow section downstream from the partition wall has a side surface formed with inflow holes that allow exhaust gas to flow in from the expansion chamber.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: January 11, 2011
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Kazuhiko Shimomura, Hironobu Suzuki
  • Publication number: 20100307865
    Abstract: A silencer for an internal combustion engine includes a silencer housing formed by a pair of clamped housing members each having a substantially identical configuration relative to one another. The silencer housing has an intake port formed at a first end and an exhaust port formed at a second, opposite end. At least one separator is received in the silencer housing between and spaced apart from the first end and the second end. The at least one separator extends transversely across the silencer housing relative to a longitudinal length of the silencer housing.
    Type: Application
    Filed: June 8, 2009
    Publication date: December 9, 2010
    Inventor: Douglas M. Olsen
  • Publication number: 20100282538
    Abstract: A muffler for an internal combustion engine has a casing forming an expansion chamber therein. An inlet duct is connected to the casing and projects into the expansion chamber and discharges exhaust fluid into the expansion chamber. The casing tapers in an upstream direction to form a pocket for receiving reverse flow of the exhaust gases and to minimize reverse flow from flowing back into the inlet duct in an upstream direction. In the discharge end of the inlet duct are a set of primary vanes and a set of secondary vanes. The vanes are secured to the walls of the duct and extend radially toward the central area of the duct. The vanes are angled in order to deflect the exhaust fluid flow into a swirling movement as it is discharged into the expansion chamber and maintains that swirling movement while passing out of the casing through the outlet duct.
    Type: Application
    Filed: April 27, 2010
    Publication date: November 11, 2010
    Inventors: Jay S. Kim, Edward F. Hanson
  • Publication number: 20100230205
    Abstract: A muffler for a small two-cycle engine includes: a muffler body having an expansion chamber; an exhaust-gas guide member covering an outlet for exhaust gas, the outlet being provided on the muffler body and a cover hood that covers a discharge port for exhaust gas, the discharge port being provided on the exhaust-gas guide member. A guide that guides the exhaust gas in the exhaust-gas guide member is gradually widened toward a top surface of the cover hood as proceeding to the discharge port.
    Type: Application
    Filed: June 18, 2007
    Publication date: September 16, 2010
    Inventors: Buhei Kobayashi, Ryou Ono
  • Patent number: 7775323
    Abstract: A motor chain saw includes a housing with a housing wall, which has an opening for exhaust gases and a hood extending outside the housing through the opening, with a hood opening pointing to one side. Exhaust gases flowing from an interior of the housing in an exhaust jet (S) are guided to the outside through the opening. A fin is arranged on the opening and provides a silencer for exhaust gases directed towards a flow direction of the exhaust jet (S) escaping from the hood.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: August 17, 2010
    Assignee: Dolmar GmbH
    Inventor: Henning Schweinberger
  • Publication number: 20100155174
    Abstract: Noise-abatement devices are provided for a pneumatic tool that can include a housing having a first end and a second end. An expansion chamber is defined within the expansion chamber. At least one tube is located at least partially within the expansion chamber in which the tube has at least a perforated portion, and an outlet defined therein. The device also includes a port outlet in fluid communication with the expansion chamber in which the port outlet and the outlet are located near the second end of the housing.
    Type: Application
    Filed: March 10, 2010
    Publication date: June 24, 2010
    Applicant: Longyear TM, Inc.
    Inventors: Neil James Roberts, William Murray
  • Patent number: 7735604
    Abstract: Silencer of exhaust gases, in particular for motor vehicles, comprising an inlet opening (13) and a cylindrical coat (1) provided with an outlet pipe (29) at its opposing end, said cylindrical coat (1) has an internal division into at least four working sections (5, 6, 7, 8) containing axially arranged elements, especially suppression elements, expansion chambers, a whirl chamber, resonators and twirling, deflecting, and accumulating elements, confined with at least three crosswise arranged partitions (2, 3, 4), while the cylindrical coat (1) opposite to the outlet tube (29) is provided with an inlet section (10) freely encompassing its first working section (5) provided with inlet holes (18) of exhaust gases, said inlet section (10) being attached to the surface of the cylindrical coat (1).
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: June 15, 2010
    Inventors: Eduard Mikes, Zdenek Ekart
  • Patent number: 7708115
    Abstract: A muffler for an internal combustion engine having a housing with an inlet end with an inlet opening formed for a flow of exhaust gases into the housing and an outlet end with an outlet opening formed for a discharge of exhaust gases from the housing; at least a first chamber, a intermediate and a last chamber sequentially arranged within the housing, the intermediate chamber containing a deflection element; a pipe passing longitudinally through the first chamber so as to open at its downstream end into the intermediate chamber, thereby directing the exhaust gases toward the deflection element; and a perforated pipe extending through the last chamber, the perforated pipe having an upstream opening into the intermediate chamber and configured to channel the exhaust gas to the outlet opening. A sound-attenuating material is deployed in at least one of the first chamber, the intermediate chamber and the last chamber.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: May 4, 2010
    Inventor: Zvi Shaya
  • Patent number: 7690479
    Abstract: A silencer includes a smaller cylindrical member having a planar portion and a larger cylindrical member arranged to closely contact at least a portion of the outer circumferential surface of the smaller cylindrical member. The larger cylindrical member as seen in a direction orthogonal to its axis provides an oblate cross section having a major axis X and a minor axis Y and the smaller cylindrical member is arranged to have the planar portion traversing the major axis X of the larger cylindrical member.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: April 6, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirotoshi Tanaka, Masayuki Yokoi, Fumihiko Mizuno, Hisashi Nishino, Tomoki Mabuchi
  • Patent number: 7669693
    Abstract: An object of the present invention is to provide an exhaust muffling device having a simple structure, which is capable of suppressing air column resonance favorably, irrespective of a length of an outlet pipe of an exhaust pipe which communicates with a muffler, and with which it is possible to achieve appropriate reductions in weight and cost. The exhaust muffling device of the present invention comprises a muffler having an expansion chamber whose length is L in an exhaust direction, and an outlet pipe being in communication with the expansion chamber and whose pipe length is approximately 2nL in which n is a natural number.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: March 2, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Junichi Yamaguchi, Tadashi Kondo
  • Patent number: 7669694
    Abstract: A muffler of a vehicle includes a first muffler body so as to form a first chamber, at least a second muffler body including a housing, one end portion opened and the other end portion closed, wherein one of the second muffler bodies is fitted into the other end portion of the first member to form a second chamber and the other second muffler bodies are fitted into each other through the one end portions in series to form third chambers if more than one second muffler bodies are assembled, an inflow pipe to connect the outside with the first, second and/or third chamber by passing the one end portion of the first muffler body, and an outflow pipe to communicate the first, second, and/or third chamber with the outside by passing through the other end portion of the last second muffler body.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: March 2, 2010
    Assignee: Hyundai Motor Company
    Inventor: Jongho Seon
  • Publication number: 20100011752
    Abstract: A catalytic muffler for an internal combustion engine of a portable working tool, e.g. a chain saw or a trimmer, having a housing designed to be directly attached to an exhaust port of an engine. The housing further includes a front chamber and a rear chamber divided from each other by an intermediate baffle. The housing further having an inner housing having a first open end constituting the exhaust gas inlet located in the rear chamber. The inner housing includes a catalyst body through which essentially all exhaust gas flows when in use. A second open end of the inner housing is arranged in one of said front and rear chambers and the exhaust gas outlet of the muffler is arranged in the other chamber such that treated gas in use flows through at least one aperture in the intermediate baffle from one chamber to the other.
    Type: Application
    Filed: December 22, 2006
    Publication date: January 21, 2010
    Inventor: Fredrik Edholm
  • Publication number: 20100006371
    Abstract: The acoustic muffler comprises a hollow body (10) defining at least one muffler chamber (11) which carries a gas inlet duct (20) and a gas outlet duct (30), at least one of the parts defined by the hollow body (10), by the gas inlet duct (20) and by the gas outlet duct (30) defining a gas passage (P) provided with at least one impurity filter (40) presenting a mesh surface (41) larger than that defined by the contour of the cross-section of said gas passage (P) and projecting to at least one of the sides of said cross-section.
    Type: Application
    Filed: July 5, 2007
    Publication date: January 14, 2010
    Applicant: WHIRLPOOL S.A.
    Inventors: Rodrigo Link, Claudio Roberto Hille
  • Publication number: 20090308687
    Abstract: A muffler of a vehicle includes a first muffler body so as to form a first chamber, at least a second muffler body including a housing, one end portion opened and the other end portion closed, wherein one of the second muffler bodies is fitted into the other end portion of the first member to form a second chamber and the other second muffler bodies are fitted into each other through the one end portions in series to form third chambers if more than one second muffler bodies are assembled, an inflow pipe to connect the outside with the first, second and/or third chamber by passing the one end portion of the first muffler body, and an outflow pipe to communicate the first, second, and/or third chamber with the outside by passing through the other end portion of the last second muffler body.
    Type: Application
    Filed: June 11, 2009
    Publication date: December 17, 2009
    Applicant: Hyundai Motor Company
    Inventor: Jongho SEON
  • Patent number: 7631725
    Abstract: An exhaust system comprising: an exhaust chamber having a longitudinal axis and an outer wall defining alternating longitudinally-extending ribs and grooves; and an insert within the exhaust chamber, the insert including a plurality of fins extending generally perpendicular to the longitudinal axis, each fin including a distal edge extending substantially close to the plurality of ribs, the insert defining expansion chambers between adjacent fins. Pressurized gas flowing through the exhaust chamber flows along the grooves and expands within the expansion chambers to reduce the pressure of the pressurized gas prior to the gas exiting the exhaust chamber. The fins may in some embodiments be sufficiently stiff to resist substantial deflection under the influence of the gas.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: December 15, 2009
    Assignee: Ingersoll Rand Company
    Inventors: Lloyd I. Towne, Thomas R. Headley
  • Patent number: 7617909
    Abstract: A connection between a plate and a pipe wherein the pipe passes through an opening in the plate, and wherein the plate has a spring-elastic tongue at the opening which is fixedly connected to the pipe.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: November 17, 2009
    Assignee: J. Eberspaecher GmbH & Co. KG
    Inventors: Thomas Wolf, Arnulf Spieth, Remus Boriga
  • Publication number: 20090255519
    Abstract: A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber.
    Type: Application
    Filed: April 13, 2009
    Publication date: October 15, 2009
    Applicant: DOLMAR GmbH
    Inventor: Christian Kellermann
  • Publication number: 20090229911
    Abstract: A variable geometry muffler for an exhaust system of an internal combustion engine; the muffler displays: a tubular body, which displays an inlet opening, an outlet opening and a labyrinth which determines a path for the exhaust gases from the inlet opening to the outlet opening; and a bypass valve, which is arranged within the tubular body to modify the geometry of the labyrinth according to the exhaust gas pressure; the bypass valve displays a lid, which is coupled to a bypass opening and is mobile from a closed position of the bypass opening to an opening position of the bypass opening by effect of the exhaust gas pressure and against the bias of an elastic body which tends to maintain the lid in the closed position; the elastic body consists of an elastic foil, which is folded as a “U” and displays a mobile end which supports the lid and a fixed end which is opposite to the mobile end and which is integral with a fixed part of the muffler.
    Type: Application
    Filed: May 20, 2009
    Publication date: September 17, 2009
    Applicant: MAGNETI MARELLI SISTEMI DI SCARICO S.P.A.
    Inventors: Alessandro Scotti, Antonino Fiumano', Matteo Sbarile
  • Patent number: RE47932
    Abstract: A monocore for a sound suppressor that significantly enhances the trapping and delay of the gases exiting from the sound suppressor due to the design, location, and configuration of slanted baffles and angled half-baffles, and a plurality of rods. The slanted baffles help define the blast chamber, expansion chambers, and exit chamber of the monocore. The plurality of rods may be positioned in the blast chamber or the expansions chambers. The plurality of rods may vary in length. The plurality of rods may also replace the angled half-baffles.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: April 7, 2020
    Assignee: Smith & Wesson Inc.
    Inventors: N Blake Young, Philip H Dater