DE3219359A1 - Flexible line element with a corrugated pipe - Google Patents

Flexible line element with a corrugated pipe

Info

Publication number
DE3219359A1
DE3219359A1 DE19823219359 DE3219359A DE3219359A1 DE 3219359 A1 DE3219359 A1 DE 3219359A1 DE 19823219359 DE19823219359 DE 19823219359 DE 3219359 A DE3219359 A DE 3219359A DE 3219359 A1 DE3219359 A1 DE 3219359A1
Authority
DE
Germany
Prior art keywords
corrugated pipe
protective tube
corrugated
line element
element according
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
DE19823219359
Other languages
German (de)
Other versions
DE3219359C2 (en
Inventor
Udo Erlenmayer
Bernd Dr.-Ing. Dr. Faber
Friedemann 7530 Pforzheim Scherle
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.)
Witzenmann GmbH
Original Assignee
Witzenmann GmbH
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 Witzenmann GmbH filed Critical Witzenmann GmbH
Priority to DE19823219359 priority Critical patent/DE3219359C2/en
Publication of DE3219359A1 publication Critical patent/DE3219359A1/en
Application granted granted Critical
Publication of DE3219359C2 publication Critical patent/DE3219359C2/en
Expired legal-status Critical Current

Links

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
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/154—Making multi-wall tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pipe Accessories (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A flexible line element is described for pulsating flows, which line element consists of a corrugated pipe provided with connecting pieces at the ends, especially an annular corrugated pipe of corrosion-resistant metal, in which a protective pipe is fixed by forming the start of the protective pipe in at least one corrugation of the corrugated pipe, in its interior close to the flow inlet side, the protective pipe otherwise subsequently covering at least 25% of the corrugated length of the corrugated pipe with its cylindrical region.

Description

Flexibles Leitungselement mit einem Wellrohr Flexible pipe element with a corrugated pipe

========= Die Erfindung betrifft ein flexibles Leitungselement für pulsierende Strömungen, bestehend aus einem mit endständigen Anschlußstutzen versehenen Wellrohr, insbesondere Ringwellrohr aus korrosionsbeständigem Metall, mit einem im Inneren des Wellrohres verlaufenden Schutzrohr. ========= The invention relates to a flexible line element for pulsating currents, consisting of a terminal connection piece Corrugated pipe, in particular corrugated pipe made of corrosion-resistant metal, with a protective tube running inside the corrugated pipe.

Beim Einsatz derartiger bekannter, flexibler Leitungselemente bei pulsierenden Strömungen, wie sie beispielsweise in Abgasleitungen von Kraftfahrzeugen od. dgl. auftreten, hat sich gezeigt, daß vom Wellrohr metallisch klirrende Rasselgeräusche abstrahlen, die sehr lästig sind und zu Reklamationen führen.When using such known, flexible line elements at pulsating currents, such as those in exhaust pipes of motor vehicles Od. Like. Occur, it has been shown that metallic rattling noises from the corrugated pipe emit, which are very annoying and lead to complaints.

Untersuchungen der Anmelderin haben ergeben, daß diese Geräusche von der Strömung im Leitungselement induziert werden, indem die Strömung zu einer hochfrequenten Anregung von Teilen des Wellrohres führt.Investigations by the applicant have shown that these noises of The flow in the conduit element can be induced by the flow at a high frequency Excitation of parts of the corrugated pipe leads.

Die Aufgabe der vorliegenden Erfindung liegt darin, das eingangs beschriebene Leitungselement dahingehend zu verbessern, daß es sich durch eine hohe Geräuschdämpfung auszeichnet, ohne daß dabei die Beweglichkeit des Leitungselementes nennenswert beeinträchtigt wird. Nicht zuletzt soll sich die erfindungsgemäße Lösung durch niedrige Herstellungskosten und unkomplizierten Herstellungsaufwand auszeichnen.The object of the present invention is that which is described at the outset To improve line element to the effect that it is characterized by a high level of noise attenuation characterized without the mobility of the line element being worth mentioning is affected. Last but not least, the solution according to the invention should be characterized by low Characterize manufacturing costs and uncomplicated manufacturing effort.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß die Festlegung des Schutzrohres durch Einformung des Schutzrohranfanges in zumindest einer Welle des Wellrohres nahe der Strömungszutrittsseite erfolgt und daß der anschließende zylindrische Bereich des Schutzrohres zumindest 25 % der gewellten Länge des Wellrohres überdeckt.This object is achieved according to the invention in that the definition of the protective tube by molding the start of the protective tube in at least one shaft of the corrugated pipe takes place near the flow inlet side and that the subsequent cylindrical area of the protective tube at least 25% of the corrugated length of the corrugated tube covered.

Durch diese Maßnahme ergibt sich eine unerwartet hohe Geräuschdämpfung, wobei die Flexibilität des Wellrohres praktisch keine Beeinträchtigung erfährt. Auch zeichnet sich das erfindungsgemäße Wellrohr durch günstige Herstellungskosten aus, da die Befestigung des Schutzrohres technisch einfach und damit kostengünstig ausgeführt werden kann.This measure results in an unexpectedly high noise attenuation, the flexibility of the corrugated pipe is practically not impaired. The corrugated pipe according to the invention is also characterized by favorable manufacturing costs because the attachment of the protective tube is technically simple and therefore inexpensive are executed can.

Der erfi,##ndungsgem ß-en Lösung liegt die Erkenntnis zugrunde, daß vor allem die Wellenflanken für die Geräuschentwicklung verantwortlich sind, indem diese unter der hochfrequenten Anregung durch die Strömung ähnlich wie Membranen in Schwingung geraten. Diese Schwingungen lassen sich aber erfindungsgemäß dadurch reduzierenA daß das Wellrohr dort, wo der Schutzrohranfang in die Welle eingeformt ist, zweiwandig ausgebildet ist, so daß dort jede Wellenflanke gg£. einschließlich der benachbarten Welle durch zumindest lokale Anlage der Sohutzrohrwand verstimmt wird. Dadurch wird das Schwingungsverhalten der Welle nicht nur im Berührun#sberei#ch mit dem Schutzrohr, sondern über den gesamten Umfang derart verändert, daß Schwingungen nur noch in vernachlässigbarem Ausmaß als Geräuschquelle auftreten können, Dadurch, daß der zylindrische Bereich des Schutzrohres zumindest 25 % der gewellten Länge des Wellrohres überdeckt, wird erreicht, daß die Strömung gebündelt und damit von den nachfolgenden Wellen der Wellrohrwandung abgehalten wird. Diese Strömungsbündelung ist auch noch an der Austrittsseite des Wellrohres ausreichend wirksam, so daß die dort befindlichen Wellrohrflanken keine hochfreq#uente Anregung durch die Strömung erfahren können und damit als Geräuschquelle fortfallen.The solution according to the invention is based on the knowledge that especially the wave flanks are responsible for the noise development by these under the high-frequency excitation by the flow similar to membranes start to vibrate. According to the invention, however, these vibrations can thereby be avoided A that the corrugated pipe is formed where the start of the protective pipe is molded into the shaft is, is two-walled, so that there each wave flank gg £. including the neighboring shaft detuned by at least local contact with the protective pipe wall will. As a result, the vibration behavior of the shaft is not only limited in the contact area with the protective tube, but changed over the entire circumference in such a way that vibrations can only occur as a source of noise to a negligible extent, as a result, that the cylindrical area of the protective tube is at least 25% of the corrugated length of the corrugated pipe is covered, it is achieved that the flow is bundled and thus by the subsequent waves of the corrugated pipe wall is held. This bundling of flows is also sufficiently effective on the exit side of the corrugated pipe so that the Corrugated pipe flanks located there no high-frequency excitation by the flow can experience and thus disappear as a source of noise.

Eine besonders günstige Geräuschdämpfung und dauerhafte Haltbarkeit des erfindungsgemäßen Leitungselementes kann erreicht werden, wenn der Schutzrohranfang in zwei Wellen des Wellrohres durch Einformung festgelegt ist. Hat man z. B. ein Wellrohr mit 16 bis 20 Wellen, so liegt die Einformung nach dem grundsätzlichen Erfindungsgedanken in der dritten und vierten Welle, also nahe der Strömungszutrittsseite, wobei sich gezeigt hat, daß die Dämpfung gerade schon dieser Wellen das Schwingungsverhalten der benachbarten Wellen positiv beeinflußt.A particularly favorable noise reduction and long-term durability of the line element according to the invention can be achieved if the start of the protective tube is set in two waves of the corrugated pipe by molding. Has one z. B. a Corrugated pipe with 16 to 20 corrugations, the molding is based on the basic principle Invention ideas in the third and fourth wave, i.e. near the flow inlet side, it has been shown that the damping of these waves affects the vibration behavior of the neighboring waves positively influenced.

Normalerweise genügt das Anliegen des Schutzrohres an den Flanken des Wellrohres. Besonders günstige Dämpfungswerte und darüber hinaus fertigungstechnische Vorteile werden Jedoch erreicht, wenn die Schutzrohrwandung der Wellenkontur folgend über deren gesamten Verlauf anliegt.Normally, it is sufficient for the protective tube to rest against the flanks of the corrugated pipe. Particularly favorable attenuation values and, moreover, production-related However, advantages are achieved if the protective tube wall follows the wave contour is applied over the entire course.

Ferner hat es sich als zweckmäßig erwiesen, den Beginn der in das Wellrohr eingeformten Schutzrohrwandung in den Flankenbereich des Wellrohres zu legen, weil auf diese Weise die durch den Schutzrohranfang gebildete Kante aus dem Strömungsbereich des pulsierenden Mediums weitestgehend entfernt und ebenso weitestgehend einer Verformung entzogen ist.It has also proven to be useful to start the Corrugated pipe molded protective pipe wall in the flank area of the corrugated pipe because in this way the edge formed by the start of the protective tube out of the Flow area of the pulsating medium largely removed and just as largely is withdrawn from deformation.

Ausgehend von dem vorstehend auch in Einzelheiten umrissenen Erfindungsgegenstand muß e s s es selbstverständlich auch als eingeschlossen betrachtet werden, insbesondere bei längeren Abgasleitungen das erfindungsgemäße Schutzrohr mehrfach hintereinander in der geschilderten Weise anzuordnen.Based on the subject matter of the invention also outlined in detail above it must of course also be regarded as included, in particular in the case of longer exhaust pipes, the protective tube according to the invention several times in a row to be arranged in the manner described.

Weitere erfindungswesentliche Merkmale und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung einer Ausführungsform der ~Erfindung anhand der Zeichnung.Further features and details essential to the invention emerge from the following description of an embodiment of the invention with reference to Drawing.

Die Zeichnung zeigt ein einwandiges Ringwellrohr 1 aus Edelstahl, an das endständige, zylindrische Anschlußflansche angeformt sind, wie von diesen einer unter der Position 2 dargestellt ist. Selbstverständlich können auch Anschlußstutzen verwendet werden.The drawing shows a single-walled corrugated pipe 1 made of stainless steel, are formed on the terminal, cylindrical connecting flanges, as of these one is shown under position 2. Of course, connecting pieces can also be used be used.

In die Wellen 3 und 4 nahe der Strömungszutrittsseite 5 ist ein Schutzrohr 6 eingeformt, dessen anschließendes zylindrisches Ende mindestens 25 % der gewellten Länge des Wellrohres 1 mit Abstand überdeckt und in Höhe eines Wellenberges bei 8 endet. Strömungstechnisch ist es vorteilhaft, den Schutzrohranfang so einzuformen, daß er in einer Flanke 7 einer Welle, im vorliegenden Falle der Welle 3, beginnt, da so die Anfangskante des Schutzrohres der Strömung weitestgehend entzogen ist.In the shafts 3 and 4 near the flow inlet side 5 is a protective tube 6 molded, the subsequent cylindrical end of at least 25% of the corrugated Length of the corrugated pipe 1 covered at a distance and at the level of a wave crest 8 ends. In terms of flow technology, it is advantageous to shape the start of the protective tube in such a way that that it begins in a flank 7 of a wave, in this case wave 3, as the starting edge of the protective tube is largely withdrawn from the flow.

LeerseiteBlank page

Claims (7)

Patentansprüche 1. Flexibles Leitungselement für pulsierende Strömungen, bestehend aus einem mit endständigen Anschlußstutzen versehenen Wellrohr, insbesondere einem Wellrohr aus korrosionsbeständigem Metall, jirit einem im Inneren des Wellrohres gegenUber diesem mit Abstand verlaufenden Schutzrohr, dadurch gekennzeichnet, daß die Festlegung des Schutzrohres (6) durch Einformung des Schutzrohranfanges in zumindest einer Welle (3, 4) des Wellrohres (1) nahe der Strömungszutrittsseite erfolgt und daß der anschließende zylindrische Bereich des Schutzrohres zumindest 25 % der gewellten Länge des Wellrohres überdeckt. Claims 1. Flexible line element for pulsating flows, consisting of a corrugated pipe provided with terminal connection pieces, in particular a corrugated pipe made of corrosion-resistant metal, jirit one inside the corrugated pipe opposite this protective tube extending at a distance, characterized in that the definition of the protective tube (6) by molding the start of the protective tube in at least a wave (3, 4) of the corrugated pipe (1) takes place near the flow inlet side and that the subsequent cylindrical area of the protective tube at least 25% of the corrugated Length of the corrugated pipe covered. 2. Leitungselement nach Anspruch 1, dadurch gekennzeichnet, daß die Festlegung des Schutzrohres (6) in zwei Wellen (3, 4) des Wellrohres (1) erfolgt.2. Line element according to claim 1, characterized in that the The protective tube (6) is fixed in two shafts (3, 4) of the corrugated tube (1). 3. Leitungselement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schutzrohranfang in der dritten und vierten Welle des Wellrohres (1) eingeformt ist.3. Line element according to claim 1 or 2, characterized in that that the beginning of the protective tube is formed in the third and fourth wave of the corrugated tube (1) is. 4. Leitungselement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Schutzrohr (6) so eingeformt ist, daß es zumindest an den Wellenflanken des Wellrohres (1) anliegt.4. Line element according to one of the preceding claims, characterized characterized in that the protective tube (6) is formed so that it is at least to the The flanks of the corrugated pipe (1) are in contact. 5. Leitungselement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Schutzrohr (6) so eingeformt ist, daß es der Kontur der Wellen folgend an diesen anliegt.5. Line element according to one of the preceding claims, characterized characterized in that the protective tube (6) is formed so that it follows the contour of the Following waves on these. 6. Leitungselement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Beginn der in das Wellrohr (1) eingeformten Schutzrohrwandung in den Flankenbereich des Wellrohres zu liegen kommt.6. Line element according to one of the preceding claims, characterized characterized in that the beginning of the protective tube wall molded into the corrugated tube (1) comes to lie in the flank area of the corrugated pipe. 7. Leitungselement nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mehrere Schutzrohre im Wellrohr festgelegt sind.7. Line element according to one of the preceding claims, characterized characterized in that several protective tubes are set in the corrugated pipe. #. Verfahren zur Herstellung eines flexiblen Leitungselementes nach einem der vorhergehenden Ansprüche ausgehend von einem fertiggewellten Rohr, dadurch gekennzeichnet, daß ein zylindrisches Schutzrohr in das Innere des Wellrohres (1) eingelegt und mit seinem Umfang relativ zu den Wellrohrflanken positioniert wird und daß durch Innendruckbelastung des ggf. geschlitzten Schutzrohranfanges dieser Bereich in die Welle des Wellrohres eingeformt wird, wobei der Schutzrohranfang in den Flankenbereich des Wellrohres zu liegen kommt.#. Method for producing a flexible conduit element according to one of the preceding claims based on a finished corrugated pipe, thereby characterized in that a cylindrical protective tube in the interior of the corrugated pipe (1) inserted and positioned with its circumference relative to the corrugated pipe flanks and that due to internal pressure loading of the possibly slotted protective tube start of this Area is molded into the shaft of the corrugated pipe, with the start of the protective pipe comes to lie in the flank area of the corrugated pipe.
DE19823219359 1982-05-22 1982-05-22 Flexible pipe element with a corrugated pipe Expired DE3219359C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823219359 DE3219359C2 (en) 1982-05-22 1982-05-22 Flexible pipe element with a corrugated pipe

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Application Number Priority Date Filing Date Title
DE19823219359 DE3219359C2 (en) 1982-05-22 1982-05-22 Flexible pipe element with a corrugated pipe

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DE3219359A1 true DE3219359A1 (en) 1983-01-05
DE3219359C2 DE3219359C2 (en) 1985-05-02

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343131A1 (en) * 1983-05-13 1984-11-15 Gilardini S.P.A., Turin/Torino Deformable pipe connection, especially as an apparatus connection to the water supply line
FR2568309A1 (en) * 1984-07-25 1986-01-31 Witzenmann Metallschlauchfab Transverse engined motor vehicle
EP1291501A1 (en) * 2001-09-10 2003-03-12 Tru-Flex Metal Hose Corp. Exhaust bellows for dynamic torsion control in an exhaust system
FR2869353A1 (en) * 2004-04-23 2005-10-28 Renault Sas Decoupling hose for use with exhaust pipe, has gauge situated inside exhaust line at level of hose from flange to solder of the hose on one tube, where gauge includes ring and another tube
WO2009018918A2 (en) * 2007-08-09 2009-02-12 Witzenmann Gmbh Decoupling element for the exhaust gas system of a motor vehicle
DE102012219458A1 (en) * 2012-10-24 2014-04-24 Witzenmann Gmbh Decoupling unit for exhaust line of combustion engine in ship, has flexible duct elements provided with ring waving hose and piping element, which extends along curved region formed in inner side of duct element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004002762B4 (en) * 2004-01-20 2006-03-09 Daimlerchrysler Ag Device for sound damping in flow-through pipe systems

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE373473C (en) * 1923-04-12 Pforzheim Metallschlauch Device for securing the connection ends of a metal hose against bending over
CH240033A (en) * 1943-09-22 1945-11-30 Chicago Metal Hose Corp Flexible pipe for transporting fluid.
US3903928A (en) * 1972-08-15 1975-09-09 Smiths Industries Ltd Vehicle exhaust tubing
DE7602828U1 (en) * 1976-02-02 1977-09-29 Gustav Wahler Gmbh U. Co, 7300 Esslingen PIPE CONNECTOR FOR EXHAUST PIPES
DE2655091A1 (en) * 1976-12-04 1978-06-08 Pforzheim Metallschlauch Flexible exhaust pipe for vehicle IC engine - uses corrugated pipe with corrugations at one or both ends widened and made shallower or both
DE2544769B2 (en) * 1975-10-07 1980-05-14 Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover Safety steering for motor vehicles
DE8137649U1 (en) * 1981-12-23 1982-05-19 Gustav Wahler Gmbh U. Co, 7300 Esslingen CORRUGATED TUBE

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE373473C (en) * 1923-04-12 Pforzheim Metallschlauch Device for securing the connection ends of a metal hose against bending over
CH240033A (en) * 1943-09-22 1945-11-30 Chicago Metal Hose Corp Flexible pipe for transporting fluid.
US3903928A (en) * 1972-08-15 1975-09-09 Smiths Industries Ltd Vehicle exhaust tubing
DE2544769B2 (en) * 1975-10-07 1980-05-14 Kabel- Und Metallwerke Gutehoffnungshuette Ag, 3000 Hannover Safety steering for motor vehicles
DE7602828U1 (en) * 1976-02-02 1977-09-29 Gustav Wahler Gmbh U. Co, 7300 Esslingen PIPE CONNECTOR FOR EXHAUST PIPES
DE2655091A1 (en) * 1976-12-04 1978-06-08 Pforzheim Metallschlauch Flexible exhaust pipe for vehicle IC engine - uses corrugated pipe with corrugations at one or both ends widened and made shallower or both
DE8137649U1 (en) * 1981-12-23 1982-05-19 Gustav Wahler Gmbh U. Co, 7300 Esslingen CORRUGATED TUBE

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343131A1 (en) * 1983-05-13 1984-11-15 Gilardini S.P.A., Turin/Torino Deformable pipe connection, especially as an apparatus connection to the water supply line
FR2568309A1 (en) * 1984-07-25 1986-01-31 Witzenmann Metallschlauchfab Transverse engined motor vehicle
EP1291501A1 (en) * 2001-09-10 2003-03-12 Tru-Flex Metal Hose Corp. Exhaust bellows for dynamic torsion control in an exhaust system
EP1705347A1 (en) * 2001-09-10 2006-09-27 Tru-Flex Metal Hose Corp. Exhaust bellows for dynamic torsion control in an exhaust system
FR2869353A1 (en) * 2004-04-23 2005-10-28 Renault Sas Decoupling hose for use with exhaust pipe, has gauge situated inside exhaust line at level of hose from flange to solder of the hose on one tube, where gauge includes ring and another tube
WO2009018918A2 (en) * 2007-08-09 2009-02-12 Witzenmann Gmbh Decoupling element for the exhaust gas system of a motor vehicle
WO2009018918A3 (en) * 2007-08-09 2009-04-16 Witzenmann Gmbh Decoupling element for the exhaust gas system of a motor vehicle
DE102012219458A1 (en) * 2012-10-24 2014-04-24 Witzenmann Gmbh Decoupling unit for exhaust line of combustion engine in ship, has flexible duct elements provided with ring waving hose and piping element, which extends along curved region formed in inner side of duct element

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Publication number Publication date
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