EP0072886A1 - Improved silencer with unwelded connection of the caps and the pipes - Google Patents

Improved silencer with unwelded connection of the caps and the pipes Download PDF

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Publication number
EP0072886A1
EP0072886A1 EP82100769A EP82100769A EP0072886A1 EP 0072886 A1 EP0072886 A1 EP 0072886A1 EP 82100769 A EP82100769 A EP 82100769A EP 82100769 A EP82100769 A EP 82100769A EP 0072886 A1 EP0072886 A1 EP 0072886A1
Authority
EP
European Patent Office
Prior art keywords
silencer
pipe
inner pipe
pipes
caps
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.)
Granted
Application number
EP82100769A
Other languages
German (de)
French (fr)
Other versions
EP0072886B1 (en
Inventor
Alfredo Sala
Attilio Marzorati
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.)
Siette Impianti Elettrici Telefonic Soc
Original Assignee
Siette SpA Divisione Iao Industrie Riunite
Siette Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc
SIETTE SpA DIVISION IAO IND
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11199389&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0072886(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siette SpA Divisione Iao Industrie Riunite, Siette Impianti Elettrici Telefonici Telegrafici & Costruzioni Edili SpA Soc, SIETTE SpA DIVISION IAO IND filed Critical Siette SpA Divisione Iao Industrie Riunite
Priority to AT82100769T priority Critical patent/ATE25129T1/en
Publication of EP0072886A1 publication Critical patent/EP0072886A1/en
Application granted granted Critical
Publication of EP0072886B1 publication Critical patent/EP0072886B1/en
Expired 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
    • 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
    • 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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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

Definitions

  • the present invention relates to a silencer having a considerable utility and ease of use because of the unwelded connection of the caps and the pipes to the ends of said silencer.
  • the silencers presently available on the market have the considerable drawback of requiring weldings for joining the various components and it is known that welding is a time-consuming, troublesome, expensive and polluting process, requiring also skilled and qualified operators.
  • the quality of the weld affects in a decisive way the performance and operative life of the silencer, and in view of the steadily increasing shortage of skilled qualified welders, it is more and more difficult to produce silencers of a good quality and long-lasting.
  • welding has the intrinsic drawback of altering the material of the workpiece and of its coating (aluminizing) so that it is necessary to carry out again plating of the metal at the welding area after the welding operation.
  • the present invention removes these drawbacks because it eliminates welding of the silencer inner pipe to the end caps as well as of the exhaust and tail pipes to the inner pipe, which is now forming a mass of weld material all around and on the edge of the cap bore.
  • the improved silencer according to the present invention is therefore characterized by the fact that its inner pipe is fixed to the end caps by seaming, while the incoming exhaust pipe (from the engine) and the outgoing tail pipe are in turn fixed to the corresponding ends of the inner pipe also by seaming.
  • the silencer inner pipe 4 is fixed to the cap 3 by seaming, obtained by cold making with a suitable tool two waves or dimples 5 and 6 between which the edge 7. of the cap bore is clamped, so as to create the stable, safe and resistant connection of said elements, by means of pressure and deformation of the two matching surfaces.
  • the pipe 8 which can be either the incoming exhaust pipe from the engine exhaust manifold or the outgoing tail pipe discharging to the atmosphere the exhaust gases, is inserted into or onto the end of said inner pipe 4 and then with an outer seaming operation for the two assembled pipes, two corresponding waves or dimples 9 and 10 are formed on them, so as to mutually clamp them in a stable and safe way.

Landscapes

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

Abstract

As improved silencer for internal combustion engines with unwelded connection of the caps and the pipes is provided, wherein its inner pipe (4) is fixed by seaming to the end caps (3) of the silencer, while the incoming exhaust pipe and/or the outgoing tail pipe are in turn fixed by seaming to the corresponding ends of said inner pipe (4), with reduction of costs, better quality of the silencer and improvement of the environmental working conditions.

Description

  • The present invention relates to a silencer having a considerable utility and ease of use because of the unwelded connection of the caps and the pipes to the ends of said silencer.
  • The silencers presently available on the market have the considerable drawback of requiring weldings for joining the various components and it is known that welding is a time-consuming, troublesome, expensive and polluting process, requiring also skilled and qualified operators. The quality of the weld affects in a decisive way the performance and operative life of the silencer, and in view of the steadily increasing shortage of skilled qualified welders, it is more and more difficult to produce silencers of a good quality and long-lasting.
  • Furthermore, welding has the intrinsic drawback of altering the material of the workpiece and of its coating (aluminizing) so that it is necessary to carry out again plating of the metal at the welding area after the welding operation.
  • The present invention removes these drawbacks because it eliminates welding of the silencer inner pipe to the end caps as well as of the exhaust and tail pipes to the inner pipe, which is now forming a mass of weld material all around and on the edge of the cap bore.
  • The improved silencer according to the present invention is therefore characterized by the fact that its inner pipe is fixed to the end caps by seaming, while the incoming exhaust pipe (from the engine) and the outgoing tail pipe are in turn fixed to the corresponding ends of the inner pipe also by seaming.
  • The advantages obtained with this system are various and considerable, such as the great reduction of manufacturing cost due to welding elimination, without needing the specialized staff for it, which can now be replaced by unskilled labor, moreover doing a light job in a non polluting environment; manufacturing speed and uniform quality of the product, no more subject to the individual skill of the welders; elimination of thermal stresses and chemico-physical alterations of the material, which were caused by the welding process.
  • These and other advantages, objects and features of the present invention will be more apparent from the following detailed description, made with reference to the sole figure of the accompanying drawing, diagramatically showing the area of connection of the inner pipe to an end cap of the silencer, as well as of an exhaust pipe to the end of said inner pipe.
  • With reference now to said sole figure of the accompanying drawing, one can see partially the outer body 1 of the silencer to which the usual closure cap 3 is seamed by means of a double heading 2.
  • The silencer inner pipe 4 is fixed to the cap 3 by seaming, obtained by cold making with a suitable tool two waves or dimples 5 and 6 between which the edge 7. of the cap bore is clamped, so as to create the stable, safe and resistant connection of said elements, by means of pressure and deformation of the two matching surfaces.
  • In the same way the exhaust line is fixed at the end of inner pipe 4, protruding outside the silencer.
  • The pipe 8, which can be either the incoming exhaust pipe from the engine exhaust manifold or the outgoing tail pipe discharging to the atmosphere the exhaust gases, is inserted into or onto the end of said inner pipe 4 and then with an outer seaming operation for the two assembled pipes, two corresponding waves or dimples 9 and 10 are formed on them, so as to mutually clamp them in a stable and safe way.
  • It is to be understood that the materials used, the equipment and tools used to carry out the connection of the elements, the number and size of the pipes may be varied in the wider and greater manner, without departing however from the principles and the features illustrated and described hereinbefore.

Claims (4)

1) Improved silencer, characterized by the fact that its inner pipe (4) is fixed by seaming to the end caps (3) of the silencer, while the incoming exhaust pipe and/or the outgoing tail pipe are in turn fixed by seaming to the corresponding ends of said inner pipe (4).
2) Improved silencer according to Claim 1, characterized by the fact that the inner pipe (4) gets by cold deformation two waves or dimples (5, 6) between which the edge (7) of the silencer cap bore is clamped.
3) Improved silencer according to Claim 1, characterized by the fact that the incoming exhaust pipe and/or the outgoing tail pipe is inserted into or onto the free end of the silencer inner pipe (4) and then the two assembled pipes get by cold deformation two corresponding waves or dimples (9, 10) which are mutually clamping them together.
4) Improved silencer according to one or more of the preceding claims, characterized by the fact that the end cap (3) is seamed to the silencer body (1) by double heading (2).
EP82100769A 1981-08-20 1982-02-03 Improved silencer with unwelded connection of the caps and the pipes Expired EP0072886B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100769T ATE25129T1 (en) 1981-08-20 1982-02-03 SILENCER WITHOUT A WELDING CONNECTION OF THE DASHBOARDS WITH THE PIPE SOCKETS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8122698U IT8122698V0 (en) 1981-08-20 1981-08-20 PERFECTED SILENCER WITH ATTACK WITHOUT WELDING THE CAPS AND EXHAUST PIPES.
IT2269881U 1981-08-20

Publications (2)

Publication Number Publication Date
EP0072886A1 true EP0072886A1 (en) 1983-03-02
EP0072886B1 EP0072886B1 (en) 1987-01-21

Family

ID=11199389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100769A Expired EP0072886B1 (en) 1981-08-20 1982-02-03 Improved silencer with unwelded connection of the caps and the pipes

Country Status (4)

Country Link
EP (1) EP0072886B1 (en)
AT (1) ATE25129T1 (en)
DE (1) DE3275215D1 (en)
IT (1) IT8122698V0 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3415064A1 (en) * 1984-04-21 1985-10-31 Fa. J. Eberspächer, 7300 Esslingen Process for the manufacture of a silencer
WO1998058165A1 (en) * 1997-06-16 1998-12-23 Delaroy Sdn.Bhd Tube end closure
EP1143123A1 (en) * 2000-04-05 2001-10-10 Faurecia Systèmes d'Echappement Exhauster with through tube and its process of making
WO2004098026A1 (en) * 2003-04-29 2004-11-11 Robert Bosch Gmbh Electric machine comprising a folding joint
EP1882835A1 (en) * 2006-07-25 2008-01-30 Benteler Automobiltechnik GmbH Method for connecting a flange plate with a pipe carrying exhaust gas and flange-pipe connection
CN101303148B (en) * 2006-11-22 2010-06-02 Lg电子株式会社 Air-conditioner
WO2013053992A1 (en) * 2011-10-13 2013-04-18 Wärtsilä Finland Oy Pipe structure and exhaust system
WO2017132649A1 (en) * 2016-01-28 2017-08-03 Admc Holding, Llc Muffler joint

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1214989A (en) * 1967-10-05 1970-12-09 Quinton Hazell Silencers Ltd Improvements relating to exhaust gas silencers for internal combustion engines
FR2173458A5 (en) * 1972-02-25 1973-10-05 Peugeot
GB2022697A (en) * 1978-05-31 1979-12-19 Armstrong Patents Co Ltd Improvements in or relating to exhaust gas silencers for internal combustion engines
FR2457969A1 (en) * 1977-07-09 1980-12-26 Harmo Ind Ltd Joint between silencer end cap and outlet pipe - is achieved by forming ridges with expanding mandrel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1214989A (en) * 1967-10-05 1970-12-09 Quinton Hazell Silencers Ltd Improvements relating to exhaust gas silencers for internal combustion engines
FR2173458A5 (en) * 1972-02-25 1973-10-05 Peugeot
FR2457969A1 (en) * 1977-07-09 1980-12-26 Harmo Ind Ltd Joint between silencer end cap and outlet pipe - is achieved by forming ridges with expanding mandrel
GB2022697A (en) * 1978-05-31 1979-12-19 Armstrong Patents Co Ltd Improvements in or relating to exhaust gas silencers for internal combustion engines

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3415064A1 (en) * 1984-04-21 1985-10-31 Fa. J. Eberspächer, 7300 Esslingen Process for the manufacture of a silencer
WO1998058165A1 (en) * 1997-06-16 1998-12-23 Delaroy Sdn.Bhd Tube end closure
US6345687B1 (en) 1997-06-16 2002-02-12 Denis Thorpe Tube end closure
CN1130497C (en) * 1997-06-16 2003-12-10 德拉鲁耶有限公司 Tube end closure
EP1143123A1 (en) * 2000-04-05 2001-10-10 Faurecia Systèmes d'Echappement Exhauster with through tube and its process of making
FR2807352A1 (en) * 2000-04-05 2001-10-12 Ecia Equip Composants Ind Auto EXHAUST VOLUME COMPRISING A THROUGH TUBE AND METHOD FOR THE PRODUCTION THEREOF
WO2004098026A1 (en) * 2003-04-29 2004-11-11 Robert Bosch Gmbh Electric machine comprising a folding joint
EP1882835A1 (en) * 2006-07-25 2008-01-30 Benteler Automobiltechnik GmbH Method for connecting a flange plate with a pipe carrying exhaust gas and flange-pipe connection
CN101303148B (en) * 2006-11-22 2010-06-02 Lg电子株式会社 Air-conditioner
WO2013053992A1 (en) * 2011-10-13 2013-04-18 Wärtsilä Finland Oy Pipe structure and exhaust system
WO2017132649A1 (en) * 2016-01-28 2017-08-03 Admc Holding, Llc Muffler joint
US10233815B2 (en) 2016-01-28 2019-03-19 Admc Holding, Llc Muffler joint

Also Published As

Publication number Publication date
EP0072886B1 (en) 1987-01-21
ATE25129T1 (en) 1987-02-15
DE3275215D1 (en) 1987-02-26
IT8122698V0 (en) 1981-08-20

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