US2834427A - Muffler having a cover and a retaining strip therefor - Google Patents

Muffler having a cover and a retaining strip therefor Download PDF

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Publication number
US2834427A
US2834427A US399686A US39968653A US2834427A US 2834427 A US2834427 A US 2834427A US 399686 A US399686 A US 399686A US 39968653 A US39968653 A US 39968653A US 2834427 A US2834427 A US 2834427A
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United States
Prior art keywords
cover
muffler
retaining strip
shell
ears
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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
US399686A
Inventor
Walter H Powers
Benton D Jacokes
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Walker Manufacturing Co
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Walker Manufacturing Co
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Priority to US399686A priority Critical patent/US2834427A/en
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Publication of US2834427A publication Critical patent/US2834427A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838Construction 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
    • F01N13/1844Mechanical joints
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/14Exhaust 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 having thermal insulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838Construction 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
    • F01N13/1844Mechanical joints
    • F01N13/185Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/02Tubes being perforated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/06Tubes being formed by assembly of stamped or otherwise deformed sheet-metal
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00Structure or shape of gas passages, pipes or tubes
    • F01N2470/24Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00Selection of materials for tubes, chambers or housings
    • F01N2530/26Multi-layered walls

Description

May 13, 1958 w. H. POWERS ET AL 2,334,427

MUFFLER HAVING A COVER AND A RETAINING STRIP THEREFOR Filed Dec. 22. 1953 2 Shets-Sheet 1 i 1 INVENTORS:

' hflif /9, %wers BY .Zevzorr J 126 z I 2 Sheets-Sheet 2 May 13, 1958 w. H. POWERS ET AL MUFFLER HAVING A COVER AND A RETAINING STRIP THEREFOR Filed Dec. 22, 1953 MUFFLER HAVING A covER AND A RETAINING STRIP THEREFOR Walter H. Powers and Benton Jacokes, Jackson, Mich.,

assignors to Walker Manufacturing Company of Wisconsin, Racine, Wis., a corporation of Wisconsin Application December 22, 1953, Serial No. 399,686

2 Claims. (Cl. 181-61) This invention relates to mufflers and, more particularly, to a novel cover for mufflers of the type adapted to silence the exhaust gases of internal combustion engines and the like.

In the past, the usual methods for manufacturing a mufiler having a non-heat conducting material wrapped around the outer shell have ordinarily involved the use of spot welding or lockseaming to secure a metal cover over the non-heat conducting material. It is an object of this invention to provide an improved muffler having a non-heat conducting material wrapped around the outer shell thereof and secured thereto by means of a novel metal cover and retaining strip.

It is another object of this invention to provide a novel metal cover and retaining strip, adapted to secure a nonheat conducting material to the outer surface of a mufiier shell, which is simple and rugged in construction and relatively inexpensive to manufacture.

Other objects, features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

Figure 1 is a perspective view of a mutfier constructed in accordance with the principles of the invention;

Fig. 2 is a central vertical longitudinal section through the mufller of Fig. 1;

Fig. 3 is an enlarged sectional view of the structure illustrated in Fig. 2, taken within the circle marked 3;

Fig. 4 is a vertical sectional view of the structure illustrated in Fig. 2 taken along the line 44 thereof, showing the mufiier cover locked along the side of the muffler;

Fig. 5 is an enlarged sectional view of the structure illustrated in Fig. 4, taken within the circle marked 5;

Fig. 6 is an end view of the locking strip for a muffler cover made in accordance with the principles of the invention;

Fig. 7 is a fragmentary view of a modification of the structure illustrated in Fig. 4 showing the mufller cover locked along the top of the mufiler; and

Fig. 8 is a fragmentary view of a modification of the structure illustrated in Fig. 4 showing the cover locked in a position between the side and top of the mufiier.

Referring now to the drawings in detail, a conventional straight-through flow resonator type mufiler is illustrated which has a double wrapped metal shell 10 secured to the end headers 12 and 14 in overlapped, rolled-together joints 16. The muffier has a straightthrough, perforate gas conduit 18 with inlet and outlet ports or bushings 20 and 22 fastened to headers 12 and 14. An inner shell 24 surrounds conduit 18 and is divided by partitions 26 into tuning chambers. Partitions 26 serve to support conduit 18 in shell 24 and partitions 28 support shell 24 and conduit 18 in shell 10 and also to divide the casing into a series of resonator chambers communicating with the conduit 18. Since operation of the muffler is obvious to those in the art, it will not be described.

United States Patent 0 2,834,427 Patented May 13, 1958 ice A layer of non-heat conducting material 30, such as asbestos, is wrapped around the outer surface of the shell 10 and is retained thereon by a sheet metal cover 32. As is best seen in l, the cover 32 comprises a substantially rectangular piece of sheet metal which is wrapped around the outer surface of the non-heat conducting material 30. The adjoining longitudinal ends of the cover 32. are bent backwardly to form a pair of longitudinally extending ears 34 and 36 which extend outwardly in opposite directions. A sheet metal retaining strip 38 bent along its longitudinal center line to form a pair of downwardly slanting shoulders 40 and 42 (Fig. 6) and having the longitudinal edges thereof folded downwardly and inwardly to form a pair of inwardly facing channels 44 and 46, is adapted to be slid endwise over the longitudinal cars 34 and 36 to form a rigid cover joint. The distance between the inner surfaces 48 and 50 of the channels 44 and 46 respectively is less than the distance between the outer surfaces 52 and 54 of the ears 34 and 36 respectively, so that when the retaining strip 38 engages said ears, an inwardly directed force will be exerted on said ears to draw the cover 32 snugly against the non-heat conducting material 30 to hold said material securely in place on the outer surface of the shell 10. The shoulders 40 and 42 of the retaining strip 38 may be flexed upwardly to increase the distance between the surfaces 48 and 50,

if necessary, to start said strip on the ears 34 and'36. As is best seen in Figs. 4, 7 and 8, the metal cover 32 may be disposed on the mufiler so as to have the longitudinal joint, formed by the ears 34, 36 and the retaining strip 38, positioned on the side, top, or any other desirable location. I

Use of the locking channel 38 and retaining shell 32 provides a simple, inexpensive means to secure the asbestos layer 30 in place. The extra thickness provided by shell 32 and asbestos 30 increases the insulation and easing strength of the muffler and permits some reduction in thickness of metal used in shell 10 and an overall improvement in the product at a minimum of cost.

It will be appreciated that although the novel sheet metal cover 32 is illustrated on a mufiier of oval cross section, it may also be adapted for use on mufflers of other cross sectional shapes, as for example, a circular muffler. It can, obviously, be used in many other types of mufflers.

While it will be apparent that the preferred embodiments of the invention herein disclosed are well calculated to fulfill the objects above stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.

What is claimed is:

1. A muffier for silencing exhaust gases comprising, a casing having a gas inlet port and a gas outlet port, means between said ports in said casing adapted to silence exhaust gases, a layer of non-heat conducting material on the outside surface of said casing, a sheet metal cover wrapped around said casing and adapted to hold said non-heat conducting material in place, said cover having its adjoining longitudinal edges folded upwardly and backwardly to form a pair of outwardly extending longitudinal ears, a sheet metal retaining strip bent along its longitudinal center line to form a pair of downwardly slanting shoulders flexible about said center line, said shoulders having the longitudinal edges thereof folded downwardly and inwardly to form a pair of inwardly facing channels adapted to be slid over said outwardly extending longitudinal ears to lock said cover on said casing.

2. In a muffler having a sheet metal cover wrapped around the outside thereof, said cover having its adjoining longitudinal edges folded backwardly to form a pair of outwardly extending longitudinal ears, a sheet metal retaining strip bent along its longitudinal center line to form a pair of downwardly slanting shoulders, said shoulders having the longitudinal edges thereof folded downwardly and inwardly to form a pair of inwardly facing channels, the distance between the inner surfaces of said channels being less than the distance between the outer surfaces of said ears, whereby when said retaining strip is slid longitudinally over said outwardly extending ears, said inwardly facing channels wiil enclose said ears and exert an inwardly directed clamping force thereon to form a rigid joint therebetween.

References Cited in the file of this patent UNITED STATES PATENTS Hamilton July 16, Hunt Aug. 3, Bisplinghoff Mar. 9, Warsing Mar. 14, Curry Nov. 7, Moss Mar. 24,

FOREIGN PATENTS Great Britain Oct. 23, Great Britain Mar. 21,

US399686A 1953-12-22 1953-12-22 Muffler having a cover and a retaining strip therefor Expired - Lifetime US2834427A (en)

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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946395A (en) * 1958-09-03 1960-07-26 Bernard O Overland Muffler repair kit
US2966226A (en) * 1959-11-13 1960-12-27 Frank M Kalis Muffler repair jacket
US3220508A (en) * 1961-10-11 1965-11-30 Gen Motors Corp Muffler with interlocked casing and baffle members
US3224088A (en) * 1961-11-15 1965-12-21 Inland Steel Co Process for producing multi-layer metallic material
US3233699A (en) * 1962-01-02 1966-02-08 Walter A Plummer Heat and sound insulating jacket for exhaust gas muffler and tail pipe assembly
US3248791A (en) * 1960-10-28 1966-05-03 Walker Mfg Co Method of manufacturing a muffler including coating with ceramic
US3283847A (en) * 1961-01-11 1966-11-08 Walker Mfg Co Ceramic coated muffler
US3311189A (en) * 1960-10-28 1967-03-28 Walker Mfg Co Ceramic coated muffler with drainage openings
US4589516A (en) * 1984-02-20 1986-05-20 Honda Giken Kogyo Kabushiki Kaisha Muffler for internal combustion engines
US4656712A (en) * 1986-06-09 1987-04-14 Ap Industries, Inc. Method for manufacturing a heat shielded exhaust system component
US5280142A (en) * 1991-10-18 1994-01-18 Ap Parts Manufacturing Company Heat shielded exhaust system component
US5281778A (en) * 1993-06-28 1994-01-25 Midas International Corporation Vehicular muffler with heat shield
US5340952A (en) * 1991-10-30 1994-08-23 Honda Giken Kogyo Kabushiki Kaishi Exhaust muffler combining components made of different materials
WO2000001931A2 (en) * 1998-07-07 2000-01-13 Arvinmeritor, Inc. Exhaust component having multiple-plated outer shell
US6405827B1 (en) * 2000-05-10 2002-06-18 Tenneco Automotive Operating Company Inc. Lock seam for canisters
US20050023076A1 (en) * 2001-11-06 2005-02-03 Huff Norman T. Bumper/muffler assembly
US20070240932A1 (en) * 2006-04-12 2007-10-18 Van De Flier Peter B Long fiber thermoplastic composite muffler system with integrated reflective chamber
US20070240934A1 (en) * 2006-04-12 2007-10-18 Van De Flier Peter Long fiber thermoplastic composite muffler system
US20100307863A1 (en) * 2007-12-14 2010-12-09 Ocv Intellectual Capital, Llc Composite muffler system thermosetable polymers
CN102639826A (en) * 2009-10-20 2012-08-15 佛吉亚排放控制技术德国有限公司 Exhaust gas silencer
US20140231167A1 (en) * 2011-09-27 2014-08-21 Toyota Jidosha Kabushiki Kaisha Muffler
US20160061075A1 (en) * 2013-05-07 2016-03-03 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Muffler sound-insulation structure
US20160333756A1 (en) * 2014-06-04 2016-11-17 Eberspächer Exhaust Technology GmbH & Co. KG Muffler
US9938870B2 (en) 2014-03-07 2018-04-10 Tenneco Gmbh Exhaust gas muffler

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1032827A (en) * 1911-03-18 1912-07-16 William J Hamilton Receptacle.
US1148900A (en) * 1914-07-31 1915-08-03 Charles W Rabbit Muffler.
US1333533A (en) * 1919-07-21 1920-03-09 Launie C Bisplinghoff Engine-muffler
GB223327A (en) * 1923-07-25 1924-10-23 Robert Owen King Improvements in silencing devices for the exhaust gases of internal combustion engines
US2150530A (en) * 1937-10-14 1939-03-14 Martin L Warsing Muffler
US2178778A (en) * 1938-05-03 1939-11-07 Hugh F Curry Container and seam closure therefor
GB534926A (en) * 1940-05-06 1941-03-21 Frederick Louis Vaughan Improvements in means for silencing the exhaust of internal combustion engines
US2277132A (en) * 1939-08-28 1942-03-24 Walker Mfg Company Of Wisconsi Silencer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1032827A (en) * 1911-03-18 1912-07-16 William J Hamilton Receptacle.
US1148900A (en) * 1914-07-31 1915-08-03 Charles W Rabbit Muffler.
US1333533A (en) * 1919-07-21 1920-03-09 Launie C Bisplinghoff Engine-muffler
GB223327A (en) * 1923-07-25 1924-10-23 Robert Owen King Improvements in silencing devices for the exhaust gases of internal combustion engines
US2150530A (en) * 1937-10-14 1939-03-14 Martin L Warsing Muffler
US2178778A (en) * 1938-05-03 1939-11-07 Hugh F Curry Container and seam closure therefor
US2277132A (en) * 1939-08-28 1942-03-24 Walker Mfg Company Of Wisconsi Silencer
GB534926A (en) * 1940-05-06 1941-03-21 Frederick Louis Vaughan Improvements in means for silencing the exhaust of internal combustion engines

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946395A (en) * 1958-09-03 1960-07-26 Bernard O Overland Muffler repair kit
US2966226A (en) * 1959-11-13 1960-12-27 Frank M Kalis Muffler repair jacket
US3248791A (en) * 1960-10-28 1966-05-03 Walker Mfg Co Method of manufacturing a muffler including coating with ceramic
US3311189A (en) * 1960-10-28 1967-03-28 Walker Mfg Co Ceramic coated muffler with drainage openings
US3283847A (en) * 1961-01-11 1966-11-08 Walker Mfg Co Ceramic coated muffler
US3220508A (en) * 1961-10-11 1965-11-30 Gen Motors Corp Muffler with interlocked casing and baffle members
US3224088A (en) * 1961-11-15 1965-12-21 Inland Steel Co Process for producing multi-layer metallic material
US3233699A (en) * 1962-01-02 1966-02-08 Walter A Plummer Heat and sound insulating jacket for exhaust gas muffler and tail pipe assembly
US4589516A (en) * 1984-02-20 1986-05-20 Honda Giken Kogyo Kabushiki Kaisha Muffler for internal combustion engines
US4656712A (en) * 1986-06-09 1987-04-14 Ap Industries, Inc. Method for manufacturing a heat shielded exhaust system component
US5280142A (en) * 1991-10-18 1994-01-18 Ap Parts Manufacturing Company Heat shielded exhaust system component
US5340952A (en) * 1991-10-30 1994-08-23 Honda Giken Kogyo Kabushiki Kaishi Exhaust muffler combining components made of different materials
US5281778A (en) * 1993-06-28 1994-01-25 Midas International Corporation Vehicular muffler with heat shield
WO2000001931A2 (en) * 1998-07-07 2000-01-13 Arvinmeritor, Inc. Exhaust component having multiple-plated outer shell
WO2000001931A3 (en) * 1998-07-07 2000-02-17 Arvin Ind Inc Exhaust component having multiple-plated outer shell
US6405827B1 (en) * 2000-05-10 2002-06-18 Tenneco Automotive Operating Company Inc. Lock seam for canisters
US20050023076A1 (en) * 2001-11-06 2005-02-03 Huff Norman T. Bumper/muffler assembly
US7325652B2 (en) * 2001-11-06 2008-02-05 Ocv Intellectual Capital, Llc Bumper/muffler assembly
US20070240932A1 (en) * 2006-04-12 2007-10-18 Van De Flier Peter B Long fiber thermoplastic composite muffler system with integrated reflective chamber
US20070240934A1 (en) * 2006-04-12 2007-10-18 Van De Flier Peter Long fiber thermoplastic composite muffler system
US7934580B2 (en) 2006-04-12 2011-05-03 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system
US7942237B2 (en) 2006-04-12 2011-05-17 Ocv Intellectual Capital, Llc Long fiber thermoplastic composite muffler system with integrated reflective chamber
US20100307863A1 (en) * 2007-12-14 2010-12-09 Ocv Intellectual Capital, Llc Composite muffler system thermosetable polymers
CN102639826A (en) * 2009-10-20 2012-08-15 佛吉亚排放控制技术德国有限公司 Exhaust gas silencer
US20140231167A1 (en) * 2011-09-27 2014-08-21 Toyota Jidosha Kabushiki Kaisha Muffler
US9057296B2 (en) * 2011-09-27 2015-06-16 Toyota Jidosha Kabushiki Kaisha Muffler
US20160061075A1 (en) * 2013-05-07 2016-03-03 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Muffler sound-insulation structure
US9657616B2 (en) * 2013-05-07 2017-05-23 Kobe Steel, Ltd. Muffler sound-insulation structure
US9938870B2 (en) 2014-03-07 2018-04-10 Tenneco Gmbh Exhaust gas muffler
US20160333756A1 (en) * 2014-06-04 2016-11-17 Eberspächer Exhaust Technology GmbH & Co. KG Muffler
US9638077B2 (en) * 2014-06-04 2017-05-02 Eberspächer Exhaust Technology GmbH & Co. KG Muffler

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