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EP1470354A1 - Pipe for transporting automobile fluids, comprising a smooth inner tube and an annellated outer tube - Google Patents

Pipe for transporting automobile fluids, comprising a smooth inner tube and an annellated outer tube

Info

Publication number
EP1470354A1
EP1470354A1 EP03709895A EP03709895A EP1470354A1 EP 1470354 A1 EP1470354 A1 EP 1470354A1 EP 03709895 A EP03709895 A EP 03709895A EP 03709895 A EP03709895 A EP 03709895A EP 1470354 A1 EP1470354 A1 EP 1470354A1
Authority
EP
European Patent Office
Prior art keywords
tube
pipe
inner tube
pipe according
outer tube
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.)
Withdrawn
Application number
EP03709895A
Other languages
German (de)
French (fr)
Inventor
Cyrielle Cheng
Pierre Milhas
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.)
Nobel Plastiques SA
Original Assignee
Nobel Plastiques SA
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 Nobel Plastiques SA filed Critical Nobel Plastiques SA
Publication of EP1470354A1 publication Critical patent/EP1470354A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10137—Flexible ducts, e.g. bellows or hoses
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/07—Resins

Definitions

  • Pipe for transporting automotive fluids comprising a smooth inner tube and a corrugated outer tube.
  • the present invention relates to a pipe for transporting automotive fluids such as coolant, fuel, windshield washer fluid, etc.
  • a pipe for transporting automotive fluids comprising a smooth inner tube based on a fluorinated thermoplastic material, a corrugated outer tube. Which is in contact with the inner tube through the inner top of its waves and which is made of a thermoplastic material based on polyamide, and means for connecting the outer tube to the inner tube.
  • the pipe thus obtained is particularly well suited to the transport of automotive fluids and has • a good ability to be shaped, in particular by "elastic" deformation.
  • This pipe is also simple and inexpensive to produce.
  • the smooth interior pipe also makes it possible to produce simply connections with the organs to which the pipe is connected, for example by means of nipples integral with the members and force fitted into the inner tube.
  • the tubes are monolayer
  • the polyamide used is a poly 12
  • the fluorinated thermoplastic is one of the materials. following rials:
  • PVDF polyfluorovynylidene
  • ETFE ethylene tetrafluorethylene
  • EEP ethylene perfluoroethylene
  • This embodiment has very good characteristics for the transport of automotive fluids.
  • the pipe of the invention comprises an inner tube, generally designated at 1, and an outer tube, generally designated at 2, surrounding the inner tube 1 .
  • the inner tube 1 is a smooth tube here having a monolayer structure in a fluorinated thermoplastic material.
  • the fluorinated thermoplastic material used is a polyfluorovynylidene (PVDF), or a polytetrafluorethylene
  • PTFE ethylene tetrafluorethylene
  • ETFE ethylene tetrafluorethylene
  • EFEP ethylene perfluoroethylene
  • the outer tube 2 is a corrugated tube forming waves having an inner vertex 3 of inner diameter equal to or very substantially close to the outer diameter of the inner tube 1.
  • the tubes 1 and 2 are connected either at each vertex 3 by gluing or by adhesion for example during a coextrusion process or, if the pipe is of determined length, at the location of its ends by simple mechanical abutment of the outer tube 2 against a flange of the inner tube 1 with or without bonding the ends of the tubes 1 and 2 to one another.
  • materials are chosen which are capable of adhering or of being bonded to each other.
  • the outer tube 2 here has a single-layer structure of polyamide and preferably of polyamide 12.
  • the materials used can be recycled materials, for example from the grinding of scrap tubes, which causes less pollution and generates economic gain.
  • the pipe is obtained here by means of a known machine which comprises an extrusion head making it possible to produce, through a first channel, a parison which is pressed under the effect of an external suction against articulated molds surrounding the head d extrusion and moving parallel to the axis thereof.
  • a second extrusion channel allows, downstream of the parison extrusion, to fill the corrugated tube formed by the parison inside the molds with an internal smooth tube, which makes it possible to produce the pipe of the invention .
  • a supply channel between the corrugated tube and the smooth tube, of a neutral gas which will cooperate in reducing the permeability of the pipe according to the invention.
  • This neutral gas air, nitrogen or any other suitable gas, may be kept under pressure inside the waves of the corrugated tube, this pressure being able to constitute an insulating element fighting against the migration of the vapors of inside or outside through the pipe wall.
  • the connection of the two tubes will be carried out niere waterproof and preferably at each interior vertex of the corrugated tube.
  • the inner tube may include an internal conductive layer in order to allow the discharge of the electrostatic charges generated by the friction of the fluid transported along the pipe. This limits the risk of explosion when the transported fluid is flammable.
  • the material of tube 1 will be chosen according to its chemical resistance and its permeability to the fluid conveyed, while the material of tube 2 will be chosen mainly for its characteristics of resistance to the external atmosphere, chemical resistance. and mechanical and corrosion resistance.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

A pipe for transporting automobile fluids, comprising a smooth inner tube (1) based on an fluorinated thermoplastic material, an outer annellated tube (2) in contact with the inner tube by the inner vertex of the undulations thereof and which is made of a polyamide-based thermoplastic material, in addition to means for connecting the outer tube to the inner tube.

Description

Tuyau de transport de fluides automobiles comportant un tube intérieur lisse et un tube extérieur annelé. Pipe for transporting automotive fluids comprising a smooth inner tube and a corrugated outer tube.
La présente invention concerne un tuyau de transport de fluides automobiles tels que le liquide de refroidissement, le carburant, le liquide lave-glace...The present invention relates to a pipe for transporting automotive fluids such as coolant, fuel, windshield washer fluid, etc.
ARRIERE PLAN DE L'INVENTION Parmi les tuyaux utilisés dans un véhicule auto- mobile, on trouve des tuyaux lisses de forts diamètres qui présentent des coudes etJ qui sont destinés par exemple à former la tubulure de remplissage du réservoir de carburant. Ces tuyaux sont réalisés par soufflage. Or, ce mode de fabrication est relativement coûteux. On a pensé à réaliser ceux-ci par extrusion puis formage à chaud, ce procédé de fabrication étant moins coûteux, et permettant de plus d'obtenir des tuyaux relativement plus légers que les tuyaux obtenus par soufflage. Toutefois, ce procédé s'est avéré délicat du fait que les tuyaux extrudés ont tendance à s'écraser lors de leur mise en forme.BACKGROUND OF THE INVENTION Among the pipes used in a motor vehicle, there are smooth pipes of large diameters which have elbows and J which are intended for example to form the filler neck of the fuel tank. These pipes are made by blowing. However, this method of manufacture is relatively expensive. It has been thought to produce these by extrusion then hot forming, this manufacturing process being less expensive, and moreover making it possible to obtain relatively lighter pipes than the pipes obtained by blowing. However, this process has proven to be tricky because the extruded pipes tend to collapse during their shaping.
Ce type de problème se rencontre d'une manière générale dans tous les tuyaux lisses en matière plastique . qui sont mis en forme de manière à y constituer des coudes pour que leur géométrie s ' adapte à 1 ' environnement dans lequel ils sont destinés à être implantés. Plus particulièrement, de telles structures ne conviennent plus pour des diamètres supérieurs à 25 mm car elles sont difficile^ à mettre en oeuvre par thermoformage : un tube lisse de diamètre important a tendance à croquer dès qu'on lui impose un rayon de courbure trop petit.This type of problem is generally encountered in all smooth plastic pipes. which are shaped so as to form elbows so that their geometry adapts to one environment in which they are intended to be installed. More particularly, such structures are no longer suitable for diameters greater than 25 mm because they are difficult to implement by thermoforming: a smooth tube of large diameter tends to crunch as soon as a radius of curvature is imposed which is too small. .
On a pensé à substituer à ces tuyaux lisses des tuyaux annelés dont la conformation est plus facile. Toutefois, apparaissent dans ces tuyaux des problèmes de moussage du fluide et en particulier du carburant, des problèmes de bruit et des problèmes de perte de charge.We thought of replacing these smooth pipes with corrugated pipes whose conformation is easier. However, there appear in these pipes problems of foaming of the fluid and in particular of the fuel, problems of noise and problems of pressure drop.
Par ailleurs, un autre inconvénient des tuyaux actuellement utilisés réside dans le fait qu'il est difficile d'obtenir une perméabilité suffisamment faible aux fluides automobiles, qui' leur permette de remplir efficacement leur fonction. Cet inconvénient est particulière- ment gênant dans les tuyaux annelés qui présentent une grande surface en contact avec le fluide.By the way, another drawback of pipes currently used lies in the fact that it is difficult to obtain a sufficiently low permeability to automotive fluids, which allows them to effectively perform their function. This drawback is particularly troublesome in corrugated pipes which have a large surface in contact with the fluid.
Pour obvier à cet inconvénient, il est connu d'utiliser des tuyaux multicouches mais ceux-ci sont relativement onéreux. OBJET DE L-* INVENTIONTo overcome this drawback, it is known to use multilayer pipes but these are relatively expensive. PURPOSE OF THE INVENTION
Il serait donc intéressant de disposer de tuyaux de transport de fluides automobiles qui remédient à au moins une partie des inconvénients des tuyaux de l'art antérieur. BREVE DESCRIPTION DE L'INVENTIONIt would therefore be advantageous to have pipes for transporting automotive fluids which remedy at least some of the disadvantages of pipes of the prior art. BRIEF DESCRIPTION OF THE INVENTION
A cet effet, on prévoit, selon l'invention, un tuyau de transport de fluides automobiles, comportant un tube intérieur lisse à base d'un matériau thermoplastique fluoré, un tube extérieur annelé .qui est au contact du tube intérieur par le sommet intérieur de ses ondes et qui est en un matériau thermoplastique à base de polyamide, et des moyens de liaison du tube extérieur au tube intérieur.For this purpose, provision is made, according to the invention, for a pipe for transporting automotive fluids, comprising a smooth inner tube based on a fluorinated thermoplastic material, a corrugated outer tube. Which is in contact with the inner tube through the inner top of its waves and which is made of a thermoplastic material based on polyamide, and means for connecting the outer tube to the inner tube.
Le tuyau ainsi obtenu est particulièrement bien adapté au transport des fluides automobiles et présente • une bonne aptitude à être conformé, notamment par déformation" élastique. Ce tuyau est en outre simple et peu coûteux à réaliser. Le tuyau intérieur lisse permet en outre de réaliser simplement des connexions avec les or- ganes auxquels le tuyau est raccordé, par exemple au moyen de tétines solidaires des organes et emmanchées à force dans le tube intérieur.The pipe thus obtained is particularly well suited to the transport of automotive fluids and has • a good ability to be shaped, in particular by "elastic" deformation. This pipe is also simple and inexpensive to produce. The smooth interior pipe also makes it possible to produce simply connections with the organs to which the pipe is connected, for example by means of nipples integral with the members and force fitted into the inner tube.
Selon un mode de réalisation particulier, les tubes sont monocouches, le polyamide utilisé est un poly- a ide 12 et le thermoplastique fluoré est l'un des maté- riaux suivants :According to a particular embodiment, the tubes are monolayer, the polyamide used is a poly 12 and the fluorinated thermoplastic is one of the materials. following rials:
- un polyfluorovynylidene (PVDF) ,- a polyfluorovynylidene (PVDF),
- un polytetrafluorethylene (PTFE) ,- a polytetrafluorethylene (PTFE),
- un éthylène tétrafluorethylene (ETFE) , - un éthylène perfluoroéthylène (EFEP) .- an ethylene tetrafluorethylene (ETFE), - an ethylene perfluoroethylene (EFEP).
Ce mode de réalisation présente de très bonnes caractéristiques pour le transport des fluides automobiles .This embodiment has very good characteristics for the transport of automotive fluids.
D'autres caractéristiques et avantages de 1 ' in- vention ressortiront à la lecture de la description qui suit d'un mode de réalisation particulier non limitatif de l'invention.Other characteristics and advantages of the invention will emerge on reading the following description of a particular non-limiting embodiment of the invention.
BREVE DESCRIPTION DES DESSINS Il sera fait référence à la figure unique annexée représentant une demi-vue partielle, en coupe longitudinale, d'un tuyau conforme à l'invention.BRIEF DESCRIPTION OF THE DRAWINGS Reference will be made to the single appended figure representing a partial half-view, in longitudinal section, of a pipe according to the invention.
DESCRIPTION DETAILLEE D'UN MODE DE REALISATION DE L'INVENTION En référence à la figure, le tuyau de l'invention comporte un tube intérieur, généralement désigné en 1, et un tube extérieur, généralement désigné en 2, entourant, le tube intérieur 1.DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION With reference to the figure, the pipe of the invention comprises an inner tube, generally designated at 1, and an outer tube, generally designated at 2, surrounding the inner tube 1 .
Le tube intérieur 1 est un tube lisse ayant ici une structure monocouche en un matériau thermoplastique fluoré. Le matériau thermoplastique fluoré utilisé est un polyfluorovynylidene (PVDF) , ou un polytetrafluorethyleneThe inner tube 1 is a smooth tube here having a monolayer structure in a fluorinated thermoplastic material. The fluorinated thermoplastic material used is a polyfluorovynylidene (PVDF), or a polytetrafluorethylene
(PTFE)-, ou un éthylène tétrafluorethylene (ETFE) , ou est à base d'un éthylène perfluoroéthylène (EFEP) .(PTFE) -, or an ethylene tetrafluorethylene (ETFE), or is based on an ethylene perfluoroethylene (EFEP).
Le tube extérieur 2 est un tube annelé formant des ondes ayant un sommet intérieur 3 de diamètre intérieur égal ou très sensiblement voisin du diamètre extérieur du tube intérieur 1. Les tubes 1 et 2 sont reliés soit au niveau de chaque sommet 3 par collage ou par adhésion par exemple lors d'un procédé de coextrusion soit, si le tuyau est de longueur déterminée, à l'endroit de ses extrémités par simple butée mécanique du tube extérieur 2 contre une collerette du tube intérieur 1 avec ou sans collage des extrémités des tubes 1 et 2 l'une sur 1 ' autre . Lorsqu ' on souhaite que le tube intérieur 1 et le tube extérieur 2 soient solidaires au niveau de chaque sommet d'onde 3 du tube extérieur 2, on choisit bien entendu des matériaux susceptibles d'adhérer ou d'être collés les uns aux autres.The outer tube 2 is a corrugated tube forming waves having an inner vertex 3 of inner diameter equal to or very substantially close to the outer diameter of the inner tube 1. The tubes 1 and 2 are connected either at each vertex 3 by gluing or by adhesion for example during a coextrusion process or, if the pipe is of determined length, at the location of its ends by simple mechanical abutment of the outer tube 2 against a flange of the inner tube 1 with or without bonding the ends of the tubes 1 and 2 to one another. When it is desired that the inner tube 1 and the outer tube 2 be secured at each wave vertex 3 of the outer tube 2, of course, materials are chosen which are capable of adhering or of being bonded to each other.
Le tube extérieur 2 a ici une structure monocou- che en polyamide et de préférence en polyamide 12.The outer tube 2 here has a single-layer structure of polyamide and preferably of polyamide 12.
Les matériaux utilisés peuvent être des matériaux recyclés issus par exemple du broyage de chutes de tubes, ce qui occasionne moins de pollution et engendre un gain économique . Le tuyau est ici obtenu au moyen, d'une machine connue qui comporte une tête d'extrusion permettant de produire par un premier canal une paraison qui vient se plaquer sous l'effet d'une aspiration extérieure contre des moules articulés entourant la tête d'extrusion et se déplaçant parallèlement à l'axe de celle-ci. Un second canal d'extrusion permet en aval de l'extrusion de la paraison, de garnir le tube annelé que forme la paraison à l'intérieur des moules d'un tube lisse intérieur, ce qui permet de produire le tuyau de l'invention. On peut, de manière avantageuse, prévoir dans la tête d'extrusion un canal d'amenée, entre le tube annelé et le tube lisse, d'un gaz neutre qui coopérera à la diminution de la perméabilité du tuyau selon l'invention. Ce gaz neutre, de l'air, de l'azote ou tout autre gaz approprié, pourra être maintenu sous pression à l'intérieur des ondes du tube annelé, cette pression pouvant constituer un élément d'isolement luttant contre la migration des vapeurs de l'intérieur ou de l'extérieur au travers de la paroi des tuyau . La liaison des deux tubes sera réalisée de ma- nière etanche et de préférence à chaque sommet intérieur d'onde du tube annelé.The materials used can be recycled materials, for example from the grinding of scrap tubes, which causes less pollution and generates economic gain. The pipe is obtained here by means of a known machine which comprises an extrusion head making it possible to produce, through a first channel, a parison which is pressed under the effect of an external suction against articulated molds surrounding the head d extrusion and moving parallel to the axis thereof. A second extrusion channel allows, downstream of the parison extrusion, to fill the corrugated tube formed by the parison inside the molds with an internal smooth tube, which makes it possible to produce the pipe of the invention . It is advantageously possible to provide in the extrusion head a supply channel, between the corrugated tube and the smooth tube, of a neutral gas which will cooperate in reducing the permeability of the pipe according to the invention. This neutral gas, air, nitrogen or any other suitable gas, may be kept under pressure inside the waves of the corrugated tube, this pressure being able to constitute an insulating element fighting against the migration of the vapors of inside or outside through the pipe wall. The connection of the two tubes will be carried out niere waterproof and preferably at each interior vertex of the corrugated tube.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des va- riantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Of course, the invention is not limited to the embodiment described and it is possible to add variants without departing from the scope of the invention as defined by the claims.
En particulier, un autre matériau thermoplastique fluoré peut être utilisé pour le tube intérieur. De plus, le tube intérieur peut comprendre une couche interne con- ductrice afin de permettre 1 ''évacuation des charges électrostatiques engendrées par le frottement du fluide transporté le long du tuyau. On limite ainsi le risque d'explosion lorsque le fluide transporté est inflammable. On choisira le matériau du tube 1 en fonction de sa ré- sistance chimique et sa perméabilité au fluide véhiculé tandis que le matériau du tube 2 sera choisi principalement pour ses caractéristiques de résistance a l'égard de l'atmosphère extérieure, résistance au plan chimique et résistance au plan mécanique et de ,1a corrosion. In particular, another fluorinated thermoplastic material can be used for the inner tube. In addition, the inner tube may include an internal conductive layer in order to allow the discharge of the electrostatic charges generated by the friction of the fluid transported along the pipe. This limits the risk of explosion when the transported fluid is flammable. The material of tube 1 will be chosen according to its chemical resistance and its permeability to the fluid conveyed, while the material of tube 2 will be chosen mainly for its characteristics of resistance to the external atmosphere, chemical resistance. and mechanical and corrosion resistance.

Claims

REVENDICATIONS
1. Tuyau de transport de fluides automobiles, caractérisé en ce qu'il comporte un tube intérieur lisse (1) à base d'un matériau thermoplastique fluoré, un tube extérieur annelé (2) qui est au contact du tube intérieur par le sommet intérieur (3) de ses ondes et qui est en un matériau thermoplastique à base de polyamide et des moyens de liaison du tube extérieur au tube intérieur. 1. Pipe for transporting automotive fluids, characterized in that it comprises a smooth inner tube (1) based on a fluorinated thermoplastic material, an outer corrugated tube (2) which is in contact with the inner tube through the inner top (3) of its waves and which is made of a thermoplastic material based on polyamide and means for connecting the outer tube to the inner tube.
2. Tuyau selon la revendication 1, caractérisé en ce que le polyamide utilisé est un polyamide 12.2. Pipe according to claim 1, characterized in that the polyamide used is a polyamide 12.
3. Tuyau selon la revendication 1 ou la revendication 2, caractérisé en ce que le thermoplastique fluoré est un polyfluorovynylidene (PVDF) . 3. Pipe according to claim 1 or claim 2, characterized in that the fluorinated thermoplastic is a polyfluorovynylidene (PVDF).
4. Tuyau selon la revendication 1 ou la revendication 2, caractérisé en ce que le thermoplastique fluoré est un polytétrafluoréthylène (PTFE) .4. Pipe according to claim 1 or claim 2, characterized in that the fluorinated thermoplastic is a polytetrafluoroethylene (PTFE).
5. Tuyau selon la revendication 1 ou la revendication 2, caractérisé en ce que le thermoplastique fluoré est un éthylène tétrafluorethylene (ETFE) .5. Pipe according to claim 1 or claim 2, characterized in that the fluorinated thermoplastic is an ethylene tetrafluorethylene (ETFE).
6. Tuyau selon la revendication 1 ou la revendication 2, caractérisé en ce que le thermoplastique fluoré est à base d'un éthylène perfluoroéthylène (EFEP) .6. Pipe according to claim 1 or claim 2, characterized in that the fluorinated thermoplastic is based on an ethylene perfluoroethylene (EFEP).
7. Tuyau selon l'une quelconque des revendica- tions 1 à 6, caractérisé en ce que le tube intérieur (1) est monocouche .7. Pipe according to any one of claims 1 to 6, characterized in that the inner tube (1) is monolayer.
' 8. Tuyau selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le tuyau extérieur (2) est monocouche . 8. Pipe according to any one of claims 1 to 7, characterized in that the external pipe (2) is monolayer.
EP03709895A 2002-01-31 2003-01-22 Pipe for transporting automobile fluids, comprising a smooth inner tube and an annellated outer tube Withdrawn EP1470354A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0201134A FR2835306B1 (en) 2002-01-31 2002-01-31 PIPE FOR TRANSPORTING AUTOMOTIVE FLUIDS, COMPRISING A SMOOTH INTERIOR TUBE AND AN OUTER RING TUBE
FR0201134 2002-01-31
PCT/FR2003/000207 WO2003064910A1 (en) 2002-01-31 2003-01-22 Pipe for transporting automobile fluids, comprising a smooth inner tube and an annellated outer tube

Publications (1)

Publication Number Publication Date
EP1470354A1 true EP1470354A1 (en) 2004-10-27

Family

ID=27619768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03709895A Withdrawn EP1470354A1 (en) 2002-01-31 2003-01-22 Pipe for transporting automobile fluids, comprising a smooth inner tube and an annellated outer tube

Country Status (5)

Country Link
US (1) US7089965B2 (en)
EP (1) EP1470354A1 (en)
FR (1) FR2835306B1 (en)
MX (1) MXPA04007369A (en)
WO (1) WO2003064910A1 (en)

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Also Published As

Publication number Publication date
FR2835306A1 (en) 2003-08-01
FR2835306B1 (en) 2004-05-21
WO2003064910A1 (en) 2003-08-07
MXPA04007369A (en) 2004-11-26
US20050092383A1 (en) 2005-05-05
US7089965B2 (en) 2006-08-15

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