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US3220507A - Three-piece tri-flow muffler - Google Patents

Three-piece tri-flow muffler Download PDF

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Publication number
US3220507A
US3220507A US337349A US33734964A US3220507A US 3220507 A US3220507 A US 3220507A US 337349 A US337349 A US 337349A US 33734964 A US33734964 A US 33734964A US 3220507 A US3220507 A US 3220507A
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US
United States
Prior art keywords
shell
tubes
muffler
opposite sides
tri
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.)
Expired - Lifetime
Application number
US337349A
Inventor
Paul F Jettinghoff
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.)
Walker Manufacturing Co
Original Assignee
Walker Manufacturing Co
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 Walker Manufacturing Co filed Critical Walker Manufacturing Co
Priority to US337349A priority Critical patent/US3220507A/en
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Publication of US3220507A publication Critical patent/US3220507A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • 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
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/18—Dimensional characteristics of gas chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube

Definitions

  • the invention accomplishes the foregoing and other objects by means of a three-piece muilier construction in which the end headers and internal partitions have been eliminated.
  • the mufiler comprises overlapping inlet and outlet tubes and a shell. The tubes are secured to the shell for mutual reinforcement and the ends of the shell are closed by pinching down opposite sides of the shell ends.
  • FIGURE 1 is a plan view of a mufiler embodying the invention
  • FIG. 2 is a cross section along line 22 of FIG. 1;
  • FIG. 3 is an enlarged cross section along the line 3-3 of FIG. 2;
  • FIG. 4 is a cross section along the line 44 of FIG. 3.
  • the muffler 1 has a shell 3 which is initially an openended tube having the oval cross section shown in FIG. 2. There is an inlet tube 5 and an outlet tube 7 and these preferably fit snugly against opposite sides 9 and 11 of the shell, as seen in FIG. 2, and are spotwelded to it at a plurality of points, as indicated by the designations x in the drawings.
  • the tubes 5 and 7 overlap inside the shell 3 and each extends out of an end of the shell and is expanded and slotted at 13 so that it may receive and be clamped to a gas conduit (not shown).
  • the ends of the shell 3 are closed in joints 15 by pinching down and spotwelding together lips 17 on the top and bottom sides of the shell.
  • the tubes 5 and 7 provide reinforcement for the shell against undue shell wall collapse during the end pinch down operation.
  • the wall of at least one of the tubes is louvered and such louvers are shown at 19 in tube 7.
  • louver arrangements may be used as desire
  • gas enters inlet tube 5 and, as it is imperforate, flows down to the end where it enters chamber 21 defined by the shell 3. It then reverses its direction to flow back in chamber 21 until it reaches the inlet end of tube 7 where it reverses direction to flow out of the mufiler 1.
  • Cross bleeding and high frequency sound attenuation are provided by louvers 19.
  • the tapered shape of the ends of the shell as seen at 23 extract sound energy from the gas upon impingement, particularly at the end of the imperforate inlet tube 5.
  • the shell 3 is 10" long, 5% wide, and 1%" deep. Thus, the unit occupies very little space but still gives the benefits of a tri-flow gas pattern.
  • a mufiler consisting of only three parts, said three parts comprising an inlet tube, an outlet tube, and a shell, said tubes and shell being parallel, said shell being oval in cross section and said tubes being fitted against and secured to opposite sides of the shell for mutual reinforcement, opposite ends of the shell having opposite sides extending inwardly to meet together to close the ends of the shell, said tubes being longitudinally overlapping in said shell.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Description

Nov. 30, 1965 P. F. JETTINGHOFF 3,
THREE-PIECE TRI-FLOW MUFFLER Filed Jan. 13, 1964 E ,NVENTOR United States Patent 3,220,507 THREE-PIECE TRI-FLOW MUFFLER Paul F. Jettinghofr, Jackson, Mich, assignor to Walker Manufacturing Company, a corporation of Delaware Filed Jan. 13, 1964, Ser. No, 337,349 3 Claims. (Cl. 181-53) My invention relates to devices for attenuating sound in gases and, in particular, concerns a mufiler useful in the exhaust systems of internal combustion engines.
It is an object of my invention to provide a small triflow silencing component useful in distributed silencer exhaust systems.
It is another object of the invention to provide a muffler construction that is simple and readily produced.
It is another object of the invention to provide a small, eflicient gas silencing device.
The invention accomplishes the foregoing and other objects by means of a three-piece muilier construction in which the end headers and internal partitions have been eliminated. The mufiler comprises overlapping inlet and outlet tubes and a shell. The tubes are secured to the shell for mutual reinforcement and the ends of the shell are closed by pinching down opposite sides of the shell ends.
The invention is illustrated in the accompanying drawings in which:
FIGURE 1 is a plan view of a mufiler embodying the invention;
FIG. 2 is a cross section along line 22 of FIG. 1;
FIG. 3 is an enlarged cross section along the line 3-3 of FIG. 2; and
FIG. 4 is a cross section along the line 44 of FIG. 3.
The muffler 1 has a shell 3 which is initially an openended tube having the oval cross section shown in FIG. 2. There is an inlet tube 5 and an outlet tube 7 and these preferably fit snugly against opposite sides 9 and 11 of the shell, as seen in FIG. 2, and are spotwelded to it at a plurality of points, as indicated by the designations x in the drawings.
The tubes 5 and 7 overlap inside the shell 3 and each extends out of an end of the shell and is expanded and slotted at 13 so that it may receive and be clamped to a gas conduit (not shown). The ends of the shell 3 are closed in joints 15 by pinching down and spotwelding together lips 17 on the top and bottom sides of the shell. The tubes 5 and 7 provide reinforcement for the shell against undue shell wall collapse during the end pinch down operation.
Preferably, the wall of at least one of the tubes is louvered and such louvers are shown at 19 in tube 7.
various other louver arrangements may be used as desire In use, gas enters inlet tube 5 and, as it is imperforate, flows down to the end where it enters chamber 21 defined by the shell 3. It then reverses its direction to flow back in chamber 21 until it reaches the inlet end of tube 7 where it reverses direction to flow out of the mufiler 1. Cross bleeding and high frequency sound attenuation are provided by louvers 19. The tapered shape of the ends of the shell as seen at 23 extract sound energy from the gas upon impingement, particularly at the end of the imperforate inlet tube 5.
In one preferred embodiment of the invention the shell 3 is 10" long, 5% wide, and 1%" deep. Thus, the unit occupies very little space but still gives the benefits of a tri-flow gas pattern.
Modifications in the structure shown may be made without departing from the spirit and scope of the invention.
I claim:
1. A mufiler consisting of only three parts, said three parts comprising an inlet tube, an outlet tube, and a shell, said tubes and shell being parallel, said shell being oval in cross section and said tubes being fitted against and secured to opposite sides of the shell for mutual reinforcement, opposite ends of the shell having opposite sides extending inwardly to meet together to close the ends of the shell, said tubes being longitudinally overlapping in said shell.
2. The invention set forth in claim 1 wherein the ends of said tubes inside said shell are open and are spaced inwardly from the ends of the shell.
3. The invention set forth in claim 1 wherein at least one of said tubes is perforate.
References Cited by the Examiner UNITED STATES PATENTS 1,619,115 3/1927 Gray 18161 X 2,115,128 4/1938 Starkweather et a1. 18157 2,166,408 7/1939 Hoyle 18154 2,251,880 8/1941 Cary et al. 18148 3,003,578 10/1961 Ewashuk 1816l X 3,158,222 11/1964 Richmond 181-6l X FOREIGN PATENTS 892,780 3/.1962 Great Britain. 355,107 12/ 1937 Italy.
LEO SMILOW, Primary Examiner.

Claims (1)

1. A MUFFLER CONSISTING OF ONLY THREE PARTS, SAID THREE PARTS COMPRISING AN INLET TUBE, AN OUTLET TUBE, AND A SHELL, SAID TUBES AND SHELL BEING PARALLEL, SAID SHELL BEING OVAL IN CROSS SECTION AND SAID TUBES BEING FITTED AGAINST AND SECURED TO OPPOSITE SIDES OF THE SHELL FOR MUTUAL REINFORCEMENT, OPPOSITE ENDS OF THE SHELL HAVING OPPOSITE SIDES EXTENDING INWARDLY TO MEET TOGETHER TO CLOSE THE ENDS OF THE SHELL, SAID TUBES BEING LONGITUDINALLY OVERLAPPING IN SAID SHELL.
US337349A 1964-01-13 1964-01-13 Three-piece tri-flow muffler Expired - Lifetime US3220507A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648803A (en) * 1969-10-13 1972-03-14 Walker Mfg Co Exhaust system
FR2663985A1 (en) * 1990-07-02 1992-01-03 Tennessee Gas Pipeline Co ONE PIECE HOUSING MUFFLER FOR A MOTOR VEHICLE, CONDUIT FORMING PART OF THE MUFFLER AND METHOD FOR MANUFACTURING THE SAME.
US5107953A (en) * 1988-07-15 1992-04-28 Nippon Petrochemicals Co., Ltd. Muffler
US5119551A (en) * 1989-02-06 1992-06-09 Tennessee Gas Pipeline Company Method of making a catalytic converter with one piece housing
US5187334A (en) * 1990-07-02 1993-02-16 Tennessee Gas Pipeline Company Acoustic muffler with one-piece housing
US20050126850A1 (en) * 2003-12-12 2005-06-16 Toyota Jidosha Kabushiki Kaisha Exhaust muffling device
US20220274714A1 (en) * 2019-07-30 2022-09-01 Orbital Australia Pty Ltd Muffler

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619115A (en) * 1921-10-20 1927-03-01 Emmet P Gray Muffler
US2115128A (en) * 1936-12-14 1938-04-26 Buffalo Pressed Steel Company Muffler
US2166408A (en) * 1938-09-01 1939-07-18 Burgess Battery Co Silencer
US2251880A (en) * 1936-04-24 1941-08-05 Hayes Ind Inc Muffler and silencer construction
US3003578A (en) * 1959-04-14 1961-10-10 Ewashuk Harry Mufflers
GB892780A (en) * 1959-12-11 1962-03-28 Morris Motors Ltd Improvements in or relating to exhaust-silencers
US3158222A (en) * 1962-07-02 1964-11-24 Thompson Ramo Wooldridge Inc Muffler

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1619115A (en) * 1921-10-20 1927-03-01 Emmet P Gray Muffler
US2251880A (en) * 1936-04-24 1941-08-05 Hayes Ind Inc Muffler and silencer construction
US2115128A (en) * 1936-12-14 1938-04-26 Buffalo Pressed Steel Company Muffler
US2166408A (en) * 1938-09-01 1939-07-18 Burgess Battery Co Silencer
US3003578A (en) * 1959-04-14 1961-10-10 Ewashuk Harry Mufflers
GB892780A (en) * 1959-12-11 1962-03-28 Morris Motors Ltd Improvements in or relating to exhaust-silencers
US3158222A (en) * 1962-07-02 1964-11-24 Thompson Ramo Wooldridge Inc Muffler

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648803A (en) * 1969-10-13 1972-03-14 Walker Mfg Co Exhaust system
US5107953A (en) * 1988-07-15 1992-04-28 Nippon Petrochemicals Co., Ltd. Muffler
US5119551A (en) * 1989-02-06 1992-06-09 Tennessee Gas Pipeline Company Method of making a catalytic converter with one piece housing
FR2663985A1 (en) * 1990-07-02 1992-01-03 Tennessee Gas Pipeline Co ONE PIECE HOUSING MUFFLER FOR A MOTOR VEHICLE, CONDUIT FORMING PART OF THE MUFFLER AND METHOD FOR MANUFACTURING THE SAME.
US5187334A (en) * 1990-07-02 1993-02-16 Tennessee Gas Pipeline Company Acoustic muffler with one-piece housing
US5216809A (en) * 1990-07-02 1993-06-08 Tennessee Gas Pipeline Company Acoustic muffler with one-piece housing
US20050126850A1 (en) * 2003-12-12 2005-06-16 Toyota Jidosha Kabushiki Kaisha Exhaust muffling device
US7669693B2 (en) * 2003-12-12 2010-03-02 Toyota Jidosha Kabushiki Kaisha Exhaust muffling device
US20220274714A1 (en) * 2019-07-30 2022-09-01 Orbital Australia Pty Ltd Muffler

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