US20100307864A1 - Automotive muffler having means for switching between loud and quieter modes - Google Patents

Automotive muffler having means for switching between loud and quieter modes Download PDF

Info

Publication number
US20100307864A1
US20100307864A1 US12/481,491 US48149109A US2010307864A1 US 20100307864 A1 US20100307864 A1 US 20100307864A1 US 48149109 A US48149109 A US 48149109A US 2010307864 A1 US2010307864 A1 US 2010307864A1
Authority
US
United States
Prior art keywords
chamber
section
exhaust gases
switching
loud
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/481,491
Inventor
John F. Bohata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SILENT ROAR EXHAUST Inc
Original Assignee
SILENT ROAR EXHAUST Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SILENT ROAR EXHAUST Inc filed Critical SILENT ROAR EXHAUST Inc
Priority to US12/481,491 priority Critical patent/US20100307864A1/en
Assigned to SILENT ROAR EXHAUST INC. reassignment SILENT ROAR EXHAUST INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOHATA, JOHN F.
Publication of US20100307864A1 publication Critical patent/US20100307864A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe

Definitions

  • the present invention relates, generally, to an improved muffler for automotive use which includes means for switching between loud and quieter modes.
  • the present invention relates to an improved muffler for high performance that would be useful for all types of automobiles, but which would preferably be used in the commercial trucking industry, which would allow the driver of the vehicle to readily switch from a quiet mode with backpressure to a loud, or louder, mode with no backpressure.
  • the means for switching from the quiet mode to the loud mode would be able to be actuated from within the car or truck cab.
  • dumper valves are generally used in the high-performance automobile industry. These dumper valve mufflers permit drivers to switch from a quiet mode to a loud mode from within the vehicle, however, when these types of mufflers are in the loud mode, all gases are dumped underneath the vehicle, as opposed to exiting from the vehicle's exhaust system.
  • dumper valve mufflers dump vehicle gases underneath the vehicle, such mufflers are not generally permitted to be used in the trucking industry, unless the truck is specially fitted with additional exhaust tubing at considerable expense, which adds to the weight of the truck and would necessarily increase operating expense as fuel mileage is decreases.
  • the prior art fails to provide or suggest the use of a loud/quiet muffler that is readily able to be switched between quiet and loud modes from within the vehicle, which does not require additional exhaust tubing, which would otherwise be required for many types of vehicles, particularly those in the trucking industry.
  • an object of the present invention to provide an automotive muffler having means for switching between loud and quiet modes, which avoids the requirement of providing additional exhaust tubing otherwise required for such types of mufflers.
  • the automotive muffler of the present invention which includes means for switching between a quiet mode to a loud mode, and vice versa, from within the car or truck cab.
  • the muffler of the invention includes chamber through which exhaust gases are passed through.
  • the chamber is divided into two sections in the direction of flow of the exhaust gases.
  • the first section of the chamber includes a series of baffles, which have a series of openings therethrough, are preferably angled for permitting the ready passage of exhaust gases through the first section of the chamber.
  • the muffler is quieted and may be considered to be in the “quiet” mode.
  • the second section of the chamber of the muffler does not have any baffles and exhaust gases are able to pass through this second section of the chamber, and exit the chamber, without obstruction.
  • the muffler may be considered to be operating in its “loud” mode.
  • the chamber is provided with a selection flap, which directs exhaust gases exclusively to either the first section of the chamber, when the muffler is to be operated in the quiet mode, or to the second section of the chamber, when the muffler is to be operated in the loud mode.
  • the selection flap which may be controlled and activated from within the vehicle, may be thought of as being operable in a fashion similar to the selection flaps of the vehicle's heating and air-conditioning system, which may either permit, or not permit, outside air to enter the vehicle's passenger compartment. It is submitted that the precise construction of the selection flap, or other selection means, for diverting exhaust gases through exclusively either the first section or the second section of the chamber of the inventive muffler, is well within the skill of one having ordinary knowledge of the relevant art.
  • FIG. 1 is a perspective view of the automotive muffler having means for switching between loud and quieter modes, in which the chamber thereof is divided into two sections in the direction of the flow of exhaust gases with the first section of the chamber having a plurality of baffles and the second section of the chamber allowing for the unobstructed passage of exhaust gases;
  • FIG. 2 is an elevational view of the automotive muffler having means for switching between loud and quieter modes, in which exhaust gases are shown passing through plurality of baffles of the first section of the chamber of the muffler when the muffler is switched to “quiet” mode;
  • FIG. 3 is an elevational view of the automotive muffler having means for switching between loud and quieter modes, in which exhaust gases are shown passing in an unobstructed manner through the second section of the chamber of the muffler when the muffler is switched to “loud” mode.
  • FIG. 1 is a perspective view of the automotive muffler 10 having means for switching in the form of a switch flap 12 , for switching muffler 10 between quiet mode and loud mode within chamber 14 .
  • Chamber 14 is divided into two sections, 14 a , 14 b .
  • Internal wall 20 provides a division of chamber 14 into first section 14 a and second section 14 b in the direction of flow of the exhaust gases.
  • Vehicle exhaust gases enter chamber 14 in the direction of the arrow leading to exhaust inlet pipe 16 a and, after passing through chamber 14 , ultimately exit through exhaust outlet pipe l 6 b , in the direction of the outlet arrow.
  • switch flap 12 is arbitrarily shown as blocking the circular opening to second section 14 b of chamber 14 , which would divert incoming exhaust gases into, and through, first section 14 b of chamber 14 .
  • the first section 14 a of chamber 14 includes a plurality of baffles 18 a , 18 b , 18 c , 18 d, 18 e, 18 f.
  • the precise number of baffles is a matter of design choice and would depend, in large measure, upon the dimensions of the muffler actually manufactured.
  • the baffles 18 are preferably angled in a direction that would tend to allow the exhaust gases to pass through the first section 14 a of chamber 14 in the direction of flow from inlet exhaust pipe 16 a to outlet exhaust pipe 16 b .
  • the preferred construction of baffles 18 is illustrated in FIG. 1 , though other shapes and sizes of the plurality of baffles are possible and within the scope of the present invention.
  • switch flap, or selection flap, 12 blocks second section 14 b , as illustrated in FIG. 1 , the muffler will be in its “quiet” mode.
  • Switch flap, or selection flap, 12 can be flipped to block the opening leading to first section 14 a , in which situation incoming exhaust gases are diverted through second section 14 b of chamber 14 and out through outlet exhaust pipe 16 b , resulting in the inventive muffler being in its “loud” mode.
  • FIG. 1 further illustrates baffles 18 as each having circular openings for exhaust gases to pass therethrough.
  • baffles 18 are a matter of design choice and all such design choices, shapes and sizes, are within the skilled of the ordinary artisan and within the scope of the present invention.
  • FIG. 2 is an elevational view of the automotive muffler 10 having means for switching, via switching flap 12 , between loud and quiet modes, in which exhaust gases are shown passing through (in the direction of the multiplicity of arrows shown in FIG. 2 ) a plurality of baffles 18 of the first section 14 a of the chamber 14 of the muffler 10 when the muffler is switched to “quiet” mode.
  • Switch flap 12 is shown blocking the opening to second section 14 b of chamber 14 , thereby necessarily diverting exhaust gases into the first section 14 a of the chamber.
  • FIG. 3 is an elevational view of the automotive muffler 10 having means for switching, via switching flap 12 , between loud and quiet modes, in which exhaust gases are shown passing through (in the direction of the multiplicity of arrows shown in FIG. 3 ) the “baffle-free” second section 14 b of the chamber 14 of the muffler 10 when the muffler is switched to “loud” mode.
  • Switch flap 12 is shown blocking the opening to first section 14 a of chamber 14 , thereby necessarily diverting exhaust gases into the second section 14 b of the chamber.
  • means for switching between diversion of exhaust gases into the first section of the chamber, as opposed to the second section of the chamber, or vice versa can be accomplished in numerous ways. It is not essential that a switch flap be used. Any means for switching the diversion of exhaust gases into one section of the chamber of the muffler, to the exclusion of the other chamber of the muffler, will suffice.

Abstract

An automotive muffler having a device for switching between loud and quieter modes includes a chamber having an inlet exhaust pipe and an outlet exhaust pipe for the passage of exhaust gases through the chamber. The first section of the chamber has a plurality of baffles with openings through the baffles for the passage of the exhaust gases. A second section of the chamber, separated from the first section of the chamber, permits a substantially unobstructed passage of exhaust gases through the second section of the chamber to the outlet exhaust pipe. A switching device is able to be selectively switched between diverting incoming exhaust gases substantially through only the first section of the chamber and diverting incoming exhaust gases substantially though only the second section of the chamber, so that when the exhaust gases are substantially diverted through only the first section of the chamber having the baffles, the automotive muffler is operated in a quiet mode and when the exhaust gases are substantially diverted through only the second section of the chamber, the automotive muffler is operated in a loud mode.

Description

    BACKGROUND OF THE INVENTION
  • 1. Technical Field of the Invention
  • The present invention relates, generally, to an improved muffler for automotive use which includes means for switching between loud and quieter modes.
  • More particularly, the present invention relates to an improved muffler for high performance that would be useful for all types of automobiles, but which would preferably be used in the commercial trucking industry, which would allow the driver of the vehicle to readily switch from a quiet mode with backpressure to a loud, or louder, mode with no backpressure. The means for switching from the quiet mode to the loud mode would be able to be actuated from within the car or truck cab.
  • 2. Description of the Prior Art
  • Currently known to the prior art, and commercially available, are mufflers that employ so-called “dumper valves,” which are generally used in the high-performance automobile industry. These dumper valve mufflers permit drivers to switch from a quiet mode to a loud mode from within the vehicle, however, when these types of mufflers are in the loud mode, all gases are dumped underneath the vehicle, as opposed to exiting from the vehicle's exhaust system.
  • Because dumper valve mufflers dump vehicle gases underneath the vehicle, such mufflers are not generally permitted to be used in the trucking industry, unless the truck is specially fitted with additional exhaust tubing at considerable expense, which adds to the weight of the truck and would necessarily increase operating expense as fuel mileage is decreases.
  • Heretofore, the prior art fails to provide or suggest the use of a loud/quiet muffler that is readily able to be switched between quiet and loud modes from within the vehicle, which does not require additional exhaust tubing, which would otherwise be required for many types of vehicles, particularly those in the trucking industry.
    • SUMMARY OF THE INVENTION
  • It is, therefore, an object of the present invention to provide an automotive muffler having means for switching between loud and quiet modes, which avoids the requirement of providing additional exhaust tubing otherwise required for such types of mufflers.
  • It is a further object of the present invention to provide an automotive muffler having means for switching between loud and quiet modes, which maintains the appearance of a conventional muffler.
  • It is, yet, an additional object of the present invention to overcome the disadvantages inherent in prior art mufflers that are capable of switching between loud and quiet modes.
  • The foregoing and related objects are achieved by the automotive muffler of the present invention, which includes means for switching between a quiet mode to a loud mode, and vice versa, from within the car or truck cab. The muffler of the invention includes chamber through which exhaust gases are passed through. The chamber is divided into two sections in the direction of flow of the exhaust gases. The first section of the chamber includes a series of baffles, which have a series of openings therethrough, are preferably angled for permitting the ready passage of exhaust gases through the first section of the chamber. As exhaust gases are passed through the first section of the chamber having the plurality of baffles, the muffler is quieted and may be considered to be in the “quiet” mode.
  • The second section of the chamber of the muffler does not have any baffles and exhaust gases are able to pass through this second section of the chamber, and exit the chamber, without obstruction. When exhaust gases pass through this second section of the chamber, the muffler may be considered to be operating in its “loud” mode.
  • The chamber is provided with a selection flap, which directs exhaust gases exclusively to either the first section of the chamber, when the muffler is to be operated in the quiet mode, or to the second section of the chamber, when the muffler is to be operated in the loud mode. The selection flap, which may be controlled and activated from within the vehicle, may be thought of as being operable in a fashion similar to the selection flaps of the vehicle's heating and air-conditioning system, which may either permit, or not permit, outside air to enter the vehicle's passenger compartment. It is submitted that the precise construction of the selection flap, or other selection means, for diverting exhaust gases through exclusively either the first section or the second section of the chamber of the inventive muffler, is well within the skill of one having ordinary knowledge of the relevant art.
  • Other objects and features of the present invention will become apparent when considered in combination with the accompanying drawing figures which illustrate certain preferred embodiments of the present invention. It should, however, be noted that the accompanying drawing figures are intended to illustrate only certain embodiments of the claimed invention and are not intended as a means for defining the limits and scope of the invention.
    • BRIEF DESCRIPTION OF THE DRAWING FIGURES
  • In the drawing, wherein similar reference numerals and symbols denote similar features throughout the several views:
  • FIG. 1 is a perspective view of the automotive muffler having means for switching between loud and quieter modes, in which the chamber thereof is divided into two sections in the direction of the flow of exhaust gases with the first section of the chamber having a plurality of baffles and the second section of the chamber allowing for the unobstructed passage of exhaust gases;
  • FIG. 2 is an elevational view of the automotive muffler having means for switching between loud and quieter modes, in which exhaust gases are shown passing through plurality of baffles of the first section of the chamber of the muffler when the muffler is switched to “quiet” mode; and,
  • FIG. 3 is an elevational view of the automotive muffler having means for switching between loud and quieter modes, in which exhaust gases are shown passing in an unobstructed manner through the second section of the chamber of the muffler when the muffler is switched to “loud” mode.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS AND DRAWING FIGURES
  • Turning now, in detail, to an analysis of the drawing figures, FIG. 1 is a perspective view of the automotive muffler 10 having means for switching in the form of a switch flap 12, for switching muffler 10 between quiet mode and loud mode within chamber 14. Chamber 14 is divided into two sections, 14 a, 14 b. Internal wall 20 provides a division of chamber 14 into first section 14 a and second section 14 b in the direction of flow of the exhaust gases. Vehicle exhaust gases enter chamber 14 in the direction of the arrow leading to exhaust inlet pipe 16 a and, after passing through chamber 14, ultimately exit through exhaust outlet pipe l 6 b, in the direction of the outlet arrow. In FIG. 1, switch flap 12 is arbitrarily shown as blocking the circular opening to second section 14 b of chamber 14, which would divert incoming exhaust gases into, and through, first section 14 b of chamber 14.
  • The first section 14 a of chamber 14 includes a plurality of baffles 18 a, 18 b, 18 c, 18 d, 18 e, 18 f. The precise number of baffles is a matter of design choice and would depend, in large measure, upon the dimensions of the muffler actually manufactured. The baffles 18 are preferably angled in a direction that would tend to allow the exhaust gases to pass through the first section 14 a of chamber 14 in the direction of flow from inlet exhaust pipe 16 a to outlet exhaust pipe 16 b. The preferred construction of baffles 18 is illustrated in FIG. 1, though other shapes and sizes of the plurality of baffles are possible and within the scope of the present invention.
  • When switch flap, or selection flap, 12 blocks second section 14 b, as illustrated in FIG. 1, the muffler will be in its “quiet” mode. Switch flap, or selection flap, 12 can be flipped to block the opening leading to first section 14 a, in which situation incoming exhaust gases are diverted through second section 14 b of chamber 14 and out through outlet exhaust pipe 16 b, resulting in the inventive muffler being in its “loud” mode.
  • FIG. 1 further illustrates baffles 18 as each having circular openings for exhaust gases to pass therethrough. Obviously, the number and shape of the openings of the baffles is a matter of design choice and all such design choices, shapes and sizes, are within the skilled of the ordinary artisan and within the scope of the present invention.
  • FIG. 2 is an elevational view of the automotive muffler 10 having means for switching, via switching flap 12, between loud and quiet modes, in which exhaust gases are shown passing through (in the direction of the multiplicity of arrows shown in FIG. 2) a plurality of baffles 18 of the first section 14 a of the chamber 14 of the muffler 10 when the muffler is switched to “quiet” mode. Switch flap 12 is shown blocking the opening to second section 14 b of chamber 14, thereby necessarily diverting exhaust gases into the first section 14 a of the chamber.
  • FIG. 3 is an elevational view of the automotive muffler 10 having means for switching, via switching flap 12, between loud and quiet modes, in which exhaust gases are shown passing through (in the direction of the multiplicity of arrows shown in FIG. 3) the “baffle-free” second section 14 b of the chamber 14 of the muffler 10 when the muffler is switched to “loud” mode. Switch flap 12 is shown blocking the opening to first section 14 a of chamber 14, thereby necessarily diverting exhaust gases into the second section 14 b of the chamber.
  • It will be apparent to the skilled artisan that modification to the shape of the chamber and the relative sizes of each of the sections of the chamber, as well as the plurality of baffles and the openings therein, can be readily made and are all within the scope of the present invention.
  • Likewise, means for switching between diversion of exhaust gases into the first section of the chamber, as opposed to the second section of the chamber, or vice versa, can be accomplished in numerous ways. It is not essential that a switch flap be used. Any means for switching the diversion of exhaust gases into one section of the chamber of the muffler, to the exclusion of the other chamber of the muffler, will suffice.
  • While only several embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that many modifications may be made to the present invention without departing from the spirit and scope thereof.

Claims (5)

1. An automotive muffler having means for switching between loud and quieter modes, comprising:
a chamber having an inlet exhaust pipe and an outlet exhaust pipe for the passage of exhaust gases through said chamber;
a first section of said chamber having a plurality of baffles with openings through said plurality of baffles for the passage of the exhaust gases;
a second section of said chamber separated from said first section of said chamber for permitting the substantially unobstructed passage of exhaust gases therethrough to the outlet exhaust pipe; and,
means for selectively switching between diverting incoming exhaust gases substantially through only said first section of said chamber and diverting incoming exhaust gases substantially though only said second section of said chamber, so that when the exhaust gases are substantially diverted through only said first section of said chamber having said plurality of baffles, said automotive muffler is operable in a quiet mode, and when the exhaust gases are substantially diverted through only said second section of said chamber, said automotive muffler is operable in a loud mode.
2. The automotive muffler having means for switching between loud and quieter modes according to claim 1, wherein said plurality of baffles of said first section of said chamber are angled for allowing the ready passage of the exhaust gases therethrough.
3. The automotive muffler having means for switching between loud and quieter modes according to claim 1, wherein said plurality of baffles of said first section has circular openings passing therethrough.
4. The automotive muffler having means for switching between loud and quieter modes according to claim 1, wherein said means for selectively switching means for switching between diverting incoming exhaust gases substantially through only said first section of said chamber and diverting incoming exhaust gases substantially though only said second section of said chamber includes a switching flap for substantially blocking an opening to either said first section or said second section of said chamber, thereby diverting the exhaust gases to either said second section or said first section, respectively, that is unblocked by said switching flap.
5. The automotive muffler having means for switching between loud and quieter modes according to claim 4, wherein said switching flap is operable by a driver of a vehicle having said automotive muffler from a passenger compartment of the vehicle.
US12/481,491 2009-06-09 2009-06-09 Automotive muffler having means for switching between loud and quieter modes Abandoned US20100307864A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/481,491 US20100307864A1 (en) 2009-06-09 2009-06-09 Automotive muffler having means for switching between loud and quieter modes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/481,491 US20100307864A1 (en) 2009-06-09 2009-06-09 Automotive muffler having means for switching between loud and quieter modes

Publications (1)

Publication Number Publication Date
US20100307864A1 true US20100307864A1 (en) 2010-12-09

Family

ID=43299968

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/481,491 Abandoned US20100307864A1 (en) 2009-06-09 2009-06-09 Automotive muffler having means for switching between loud and quieter modes

Country Status (1)

Country Link
US (1) US20100307864A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120181106A1 (en) * 2011-01-14 2012-07-19 Frank Johan Hubert Nottelman Exhaust Assembly For Use With A Combustion Engine
US10082058B2 (en) 2015-11-02 2018-09-25 Roush Enterprises, Inc. Muffler with selected exhaust pathways
US10443479B2 (en) 2014-10-30 2019-10-15 Roush Enterprises, Inc. Exhaust control system
US10823023B2 (en) 2017-12-27 2020-11-03 Randy Phelps Selective acoustic soundproofing device
US20210095376A1 (en) * 2017-11-16 2021-04-01 Taiwan Semiconductor Manufacturing Company, Ltd. Mechanism for creating vacuum in processing apparatus

Citations (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US790248A (en) * 1904-10-08 1905-05-16 C H Blomstrom Motor Company \muffler.
US895697A (en) * 1907-03-07 1908-08-11 Benjamin W Snow Muffler.
US1299326A (en) * 1917-10-08 1919-04-01 Emmet P Gray Muffler-valve.
US1447380A (en) * 1920-10-08 1923-03-06 Julius F Goetz Combined muffler and cut-out
US1512210A (en) * 1921-11-10 1924-10-21 Palemon H Gaskins Muffler
US1658766A (en) * 1924-03-22 1928-02-07 Emmet P Gray Conduit construction
US1709426A (en) * 1927-08-04 1929-04-16 Joseph C Beery Muffler construction
US1766973A (en) * 1927-04-04 1930-06-24 John E Goerlich Muffler
US1840082A (en) * 1927-05-28 1932-01-05 Chrysler Corp Muffler
US1860892A (en) * 1929-04-11 1932-05-31 Emmet P Gray Muffler
US2488563A (en) * 1945-01-10 1949-11-22 Joseph M Sills Exhaust purifying system and method
US2625234A (en) * 1950-05-10 1953-01-13 Perry B Fina Valve controlled muffler with a plurality of through passages
US2968359A (en) * 1958-12-04 1961-01-17 Cocker Machine & Foundry Compa Muffler construction
US3090677A (en) * 1961-03-09 1963-05-21 Arvin Ind Inc Catalytic converter
US3154174A (en) * 1962-11-30 1964-10-27 Alvin S Haining Dual purpose muffler with valved by-pass means
US3805521A (en) * 1973-02-23 1974-04-23 Gen Motors Corp Exhaust flow control system
US3963447A (en) * 1971-07-20 1976-06-15 Nissan Motor Co., Ltd. Catalytic reactor for exhaust gases
US5113652A (en) * 1989-10-19 1992-05-19 Wabco Clayton Dewandre Aftermarket Limited Diesel engine exhaust system
US5123502A (en) * 1990-08-30 1992-06-23 Flowmaster, Inc. Muffler assembly with perforated partition for ignition of accumulated fuel and method
US5211012A (en) * 1988-08-26 1993-05-18 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalytic converter housing, particularly for starting catalytic converters, and associated catalyst carrier body
US5304749A (en) * 1991-09-16 1994-04-19 Rodney Crandell Muffler for internal combustion engine
US5824972A (en) * 1997-05-13 1998-10-20 Butler; Boyd L. Acoustic muffler
US6079516A (en) * 1998-03-02 2000-06-27 Pearson; James E Auto-matic back pressure relief muffler
US6178745B1 (en) * 1996-04-22 2001-01-30 Wilhelmus Lambertus Arnoldus Meusen Exhaust assembly for use with combustion engines, and vehicle provided with such assembly
US6454047B1 (en) * 2000-10-17 2002-09-24 Bbnt Solutions Llc System and method for phases noise attenuation
US6584767B1 (en) * 2001-11-09 2003-07-01 Steve Koenig Exhaust diverter
US6598390B2 (en) * 2001-12-26 2003-07-29 Liang Fei Industry Co. Ltd. Easily controlled exhaust pipe
US6612400B2 (en) * 2002-01-05 2003-09-02 Andres E. Bravo Electronically controlled variable loudness muffler
US6662554B2 (en) * 2002-01-23 2003-12-16 Deere & Company Adjustable restriction muffler system for a combine
US6820416B2 (en) * 2001-02-01 2004-11-23 Honda Giken Kogyo Kabushiki Kaisha Exhaust emission control system for an internal combustion engine
US6862878B2 (en) * 2003-01-10 2005-03-08 Robert Bosch Gmbh Method and device for operating an internal combustion engine
US20050205353A1 (en) * 2004-03-16 2005-09-22 Hui-Fang Chen Automobile muffler
US7219764B1 (en) * 2006-03-27 2007-05-22 Heartthrob Exhaust Inc. Exhaust muffler
US7249455B2 (en) * 2003-12-23 2007-07-31 Arvin Technologies, Inc. Method and apparatus for regenerating a nitrogen oxides absorber
US7527126B2 (en) * 2004-07-07 2009-05-05 Sango Co., Ltd. Exhaust apparatus of an internal combustion engine
US7549512B2 (en) * 2006-02-21 2009-06-23 Elroy Newberry Muffler for internal combustion engine
US7686130B1 (en) * 2006-08-21 2010-03-30 Fernando Quaglia Dual mode vehicle exhaust system and associated method

Patent Citations (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US790248A (en) * 1904-10-08 1905-05-16 C H Blomstrom Motor Company \muffler.
US895697A (en) * 1907-03-07 1908-08-11 Benjamin W Snow Muffler.
US1299326A (en) * 1917-10-08 1919-04-01 Emmet P Gray Muffler-valve.
US1447380A (en) * 1920-10-08 1923-03-06 Julius F Goetz Combined muffler and cut-out
US1512210A (en) * 1921-11-10 1924-10-21 Palemon H Gaskins Muffler
US1658766A (en) * 1924-03-22 1928-02-07 Emmet P Gray Conduit construction
US1766973A (en) * 1927-04-04 1930-06-24 John E Goerlich Muffler
US1840082A (en) * 1927-05-28 1932-01-05 Chrysler Corp Muffler
US1709426A (en) * 1927-08-04 1929-04-16 Joseph C Beery Muffler construction
US1860892A (en) * 1929-04-11 1932-05-31 Emmet P Gray Muffler
US2488563A (en) * 1945-01-10 1949-11-22 Joseph M Sills Exhaust purifying system and method
US2625234A (en) * 1950-05-10 1953-01-13 Perry B Fina Valve controlled muffler with a plurality of through passages
US2968359A (en) * 1958-12-04 1961-01-17 Cocker Machine & Foundry Compa Muffler construction
US3090677A (en) * 1961-03-09 1963-05-21 Arvin Ind Inc Catalytic converter
US3154174A (en) * 1962-11-30 1964-10-27 Alvin S Haining Dual purpose muffler with valved by-pass means
US3963447A (en) * 1971-07-20 1976-06-15 Nissan Motor Co., Ltd. Catalytic reactor for exhaust gases
US3805521A (en) * 1973-02-23 1974-04-23 Gen Motors Corp Exhaust flow control system
US5211012A (en) * 1988-08-26 1993-05-18 Emitec Gesellschaft Fur Emissionstechnologie Mbh Catalytic converter housing, particularly for starting catalytic converters, and associated catalyst carrier body
US5113652A (en) * 1989-10-19 1992-05-19 Wabco Clayton Dewandre Aftermarket Limited Diesel engine exhaust system
US5123502A (en) * 1990-08-30 1992-06-23 Flowmaster, Inc. Muffler assembly with perforated partition for ignition of accumulated fuel and method
US5304749A (en) * 1991-09-16 1994-04-19 Rodney Crandell Muffler for internal combustion engine
US6178745B1 (en) * 1996-04-22 2001-01-30 Wilhelmus Lambertus Arnoldus Meusen Exhaust assembly for use with combustion engines, and vehicle provided with such assembly
US5824972A (en) * 1997-05-13 1998-10-20 Butler; Boyd L. Acoustic muffler
US6079516A (en) * 1998-03-02 2000-06-27 Pearson; James E Auto-matic back pressure relief muffler
US6454047B1 (en) * 2000-10-17 2002-09-24 Bbnt Solutions Llc System and method for phases noise attenuation
US6820416B2 (en) * 2001-02-01 2004-11-23 Honda Giken Kogyo Kabushiki Kaisha Exhaust emission control system for an internal combustion engine
US6584767B1 (en) * 2001-11-09 2003-07-01 Steve Koenig Exhaust diverter
US6598390B2 (en) * 2001-12-26 2003-07-29 Liang Fei Industry Co. Ltd. Easily controlled exhaust pipe
US6612400B2 (en) * 2002-01-05 2003-09-02 Andres E. Bravo Electronically controlled variable loudness muffler
US6662554B2 (en) * 2002-01-23 2003-12-16 Deere & Company Adjustable restriction muffler system for a combine
US6862878B2 (en) * 2003-01-10 2005-03-08 Robert Bosch Gmbh Method and device for operating an internal combustion engine
US7249455B2 (en) * 2003-12-23 2007-07-31 Arvin Technologies, Inc. Method and apparatus for regenerating a nitrogen oxides absorber
US20050205353A1 (en) * 2004-03-16 2005-09-22 Hui-Fang Chen Automobile muffler
US7527126B2 (en) * 2004-07-07 2009-05-05 Sango Co., Ltd. Exhaust apparatus of an internal combustion engine
US7549512B2 (en) * 2006-02-21 2009-06-23 Elroy Newberry Muffler for internal combustion engine
US7219764B1 (en) * 2006-03-27 2007-05-22 Heartthrob Exhaust Inc. Exhaust muffler
US7686130B1 (en) * 2006-08-21 2010-03-30 Fernando Quaglia Dual mode vehicle exhaust system and associated method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120181106A1 (en) * 2011-01-14 2012-07-19 Frank Johan Hubert Nottelman Exhaust Assembly For Use With A Combustion Engine
US10443479B2 (en) 2014-10-30 2019-10-15 Roush Enterprises, Inc. Exhaust control system
US10082058B2 (en) 2015-11-02 2018-09-25 Roush Enterprises, Inc. Muffler with selected exhaust pathways
US10995640B2 (en) * 2015-11-02 2021-05-04 Roush Enterprises, Inc. Muffler with selected exhaust pathways
US20210095376A1 (en) * 2017-11-16 2021-04-01 Taiwan Semiconductor Manufacturing Company, Ltd. Mechanism for creating vacuum in processing apparatus
US11697876B2 (en) * 2017-11-16 2023-07-11 Taiwan Semiconductor Manufacturing Company, Ltd. Mechanism for creating vacuum in processing apparatus
US10823023B2 (en) 2017-12-27 2020-11-03 Randy Phelps Selective acoustic soundproofing device

Similar Documents

Publication Publication Date Title
US20100307864A1 (en) Automotive muffler having means for switching between loud and quieter modes
US6938729B2 (en) Exhaust gas system
US8807274B2 (en) Control device of a motor vehicle
US20090229913A1 (en) Dual Mode Exhaust Muffler
US7686130B1 (en) Dual mode vehicle exhaust system and associated method
CA2659777C (en) Muffler assembly
US6584767B1 (en) Exhaust diverter
US20140161671A1 (en) Exhaust mode selector system
US20160273424A1 (en) Mounting structure of variable valve for dual exhaust system
US10119442B2 (en) Muffler device including central common active control valve
FR2881084B1 (en) AERIAL NOZZLE FOR A MOTOR VEHICLE INTENDED TO BE PLACED AT THE OUTPUT OF A VENTILATION AIR DUCT IN THE CAR OF THE VEHICLE AND THE VEHICLE CORRESPONDING THEREWITH
US20060292974A1 (en) Method of operating a change-over element of an exhaust system for vehicle
US7044266B2 (en) Exhaust muffler for internal combustion engines
US956785A (en) Muffler.
JP2519596B2 (en) Dual-mode exhaust system
US7073625B2 (en) Exhaust gas muffler and flow director
US20200025057A1 (en) Reduced Length Exhaust System With Valve
US11319848B2 (en) Variable valve for muffler and dual muffler having the same
EP4023862B1 (en) Car provided with an exhaust system with aerodynamic effect
US20150219001A1 (en) Exhaust system for adjusting performance of a vehicle
KR200237019Y1 (en) Muffler device for automobile
US10513956B2 (en) Muffler assembly
EP4023863A1 (en) Exhaust system for an internal combustion engine
JP2023550420A (en) Exhaust gas system for motorcycles
KR20110023655A (en) Automobile interior room ventilator structure

Legal Events

Date Code Title Description
AS Assignment

Owner name: SILENT ROAR EXHAUST INC., NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOHATA, JOHN F.;REEL/FRAME:023526/0725

Effective date: 20091117

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION