WO2013007457A1 - Coupling an elastomer pipe to a rigid tubular end piece in a non-removable manner - Google Patents

Coupling an elastomer pipe to a rigid tubular end piece in a non-removable manner Download PDF

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Publication number
WO2013007457A1
WO2013007457A1 PCT/EP2012/060863 EP2012060863W WO2013007457A1 WO 2013007457 A1 WO2013007457 A1 WO 2013007457A1 EP 2012060863 W EP2012060863 W EP 2012060863W WO 2013007457 A1 WO2013007457 A1 WO 2013007457A1
Authority
WO
WIPO (PCT)
Prior art keywords
end piece
ring
pipe
tubular end
coupling region
Prior art date
Application number
PCT/EP2012/060863
Other languages
French (fr)
Inventor
Franck CLEMENSON
Jacques MALFROY CAMINE
Original Assignee
Contitech Anoflex Sas
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 Contitech Anoflex Sas filed Critical Contitech Anoflex Sas
Publication of WO2013007457A1 publication Critical patent/WO2013007457A1/en

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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
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members
    • F16L33/207—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
    • F16L33/2071—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
    • 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
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
    • 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
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/30—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses comprising parts inside the hoses only
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket

Definitions

  • the present invention relates to a nozzle comprising an elastomer pipe coupled to a tubular end piece made of a synthetic, composite or metallic rigid material in a non-removable manner.
  • a non-removable coupling is required, that is to say, a coupling that ensures that the elastomer pipe cannot be removed from the rigid end piece in a nondestructive manner.
  • a local deformation of the end piece could be envisaged, to form, for example, a relief bead in order to better retain the elastomer pipe.
  • the invention therefore aims to devise a coupling which makes it possible to obtain a better resistance of the elastomer pipe in a pulling direction with respect to the tubular end piece.
  • Another aim of the invention is also to provide such a coupling which is easy and inexpensive to use in industrial conditions.
  • a nozzle comprising an elastomer pipe coupled to a tubular end piece made of a rigid synthetic material in a non-removable manner, said pipe surrounding the end piece along a coupling region.
  • non-removable should be understood in this text to mean that the components of the nozzle are not intended to be removed after they have been assembled, and that removal is possible only in a destructive manner.
  • Said nozzle is characterized in that it comprises, in the coupling region, a ring crimped onto the tubular end piece, the internal wall of said ring being provided with at least one cutting edge and the external wall of said ring being provided with at least one retaining element for the elastomer pipe.
  • the internal wall of the ring has a concave profile
  • the cutting edge is situated on the side of the end of the end piece
  • the tubular end piece is made of a synthetic, composite and/or metallic rigid material
  • the tubular end piece comprises, in the coupling region, a reinforcing insert in the case where the end piece is made of a synthetic and/or composite material;
  • the nozzle comprises a crimping sleeve crimped around the elastomer pipe in the coupling region;
  • the tubular end piece is made of an extruded material, preferably polyamide.
  • Another object of the invention relates to a method for coupling a pipe made of elastomer material and a tubular end piece made of a rigid synthetic material in a non- removable manner, said pipe surrounding the end piece along a coupling region, characterized in that it comprises the following steps:
  • the step (b) for fitting the ring includes pressing the portion of the ring opposite the cutting edge against a retaining element and applying, against the ring, a tool having a tapered internal shape so as to deform the ring.
  • said method also comprises, before the step (a) for fitting the ring, a step for introducing a reinforcing insert into the tubular end piece in the coupling region.
  • said method advantageously comprises a step for crimping a sleeve in the coupling region around the elastomer pipe.
  • FIG. 1 shows a partial cross-sectional view of a nozzle according to the invention
  • FIG. 2a and 2b illustrate the tool for fitting the ring onto the end piece, respectively in perspective and in cross section.
  • the nozzle 1 comprises an elastomer pipe 2 coupled to a tubular end piece 3 by surrounding said end piece along a so-called coupling region.
  • the pipe 2 is typically an extruded pipe made of an elastomer material, such as, for example, rubber, NBR, silicone, Teflon®.
  • the tubular end piece 3 is made of a rigid synthetic material, such as, for example, polyamide, polyethylene or even a composite material.
  • the end piece 3 may also belong to a metal tube consisting of a ferrous or non-ferrous metal.
  • the tubular end piece is typically the end of an extruded, drawn, swaged, cast or stretched rigid tube; because of this, its external wall is smooth and notably does not include any relief that can constitute a retaining means for the elastomer pipe.
  • the non-removable coupling of the elastomer pipe 2 to the rigid end piece 3 is obtained by fitting, onto the tubular end piece 3 and in the coupling region, a ring 4 whose internal wall is provided with at least one cutting edge and whose external wall has at least one relief 41 that makes it possible to retain the elastomer pipe.
  • the ring 4 comprises a first cutting edge 42 arranged on the internal wall 44 of the ring, and a second cutting edge 43 situated at the end of the internal wall of the ring, the two edges being separated by a shoulder, so that the internal diameter of the first edge 42 is less than the internal diameter of the second edge 43.
  • the cutting edges are positioned on the side of the end of the end piece 3.
  • the invention is not limited to this particular ring geometry but can be implemented in a ring provided with at least one cutting edge on its internal wall.
  • Such a ring is usually employed in the cutting ring couplings which are used for leak- tight connections in hydraulic pipelines.
  • This type of ring is therefore available on the market in large quantities and at low cost.
  • Said cutting ring 4 is made of metal material, for example steel of 9SMnPb28K type.
  • the ring 4 preferably has an internal diameter slightly less than the external diameter of the end piece 3, in particular at the level of the cutting edge 42.
  • the internal wall 44 of the ring 4 is not straight but advantageously has a concave profile, which allows for a better penetration of the edges 42, 43 into the external wall of the end piece 3.
  • the operation for assembly of the ring 4 on the end piece 3 is performed by deformation using a tool 1 10 having a tapered internal shape 1 1 1 and a retaining element 100, for example in the form of a plate, which are represented in Figure 2a.
  • the deformation is obtained by placing the end piece 3 in an opening 101 of the retaining plate 100 so that the rear portion of the ring 4 (i.e., the portion opposite the cutting edge 42) is pressed against the plate 100.
  • the tapered tool 1 10 is then advanced over the end piece 3 in the direction of the arrow so as to apply a force onto the ring 4.
  • the ring 4 is deformed by closing onto the end piece 3, the cutting edge 42 penetrating into the external wall of the end piece 3.
  • a reinforcing insert 5 is advantageously first inserted into the end piece 3, in the coupling region.
  • the insert 5 is typically a metallic insert whose dimensions are designed to avoid the possibility of the end piece being extracted once it has been inserted therein.
  • the sleeve 6 is then crimped around the coupling region.
  • an intermediate portion of the sleeve 6 is deformed to restrict its section, so that its internal diameter is less than the external diameter of the pipe 2.
  • the retaining element 41 of the ring 4 which is advantageously positioned between the end of the tubular end piece 3 and the section restriction of the sleeve 6, allows for a better retention of the pipe relative to the end piece.
  • the ring 4 is braced on the end piece 3 by virtue of its cutting edge or edges.
  • a nozzle is thus obtained whose pulling strength is enhanced 2 without its manufacturing cost being significantly increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a nozzle (1) comprising an elastomer pipe (2) coupled to a rigid tubular end piece (3) in a non-removable manner, said pipe (2) surrounding the end piece (3) along a coupling region. The nozzle (1) comprises, in the coupling region, a ring (4) crimped onto the tubular end piece (3), the internal wall (44) of said ring (4) being provided with at least one cutting edge (42, 43) and the external wall of said ring being provided with at least one retaining element (41) for the elastomer pipe. The present invention also relates to a method for coupling a pipe made of elastomer material (2) and a rigid tubular end piece (3) in a non-removable manner, said pipe (2) surrounding the end piece (3) along a coupling region.

Description

COUPLING AN ELASTOMER PIPE TO A RIGID TUBULAR END PIECE IN A NONREMOVABLE MANNER
FIELD OF THE INVENTION
The present invention relates to a nozzle comprising an elastomer pipe coupled to a tubular end piece made of a synthetic, composite or metallic rigid material in a non-removable manner.
BACKGROUND OF THE INVENTION
It is often necessary, in various fields involving the circulation of fluids, to couple a pipe made of elastomer material, therefore having a certain flexibility, to a rigid tubular end piece which may be, for example, an end piece for coupling to an appliance, or the end of a rigid pipe.
In some applications, a non-removable coupling is required, that is to say, a coupling that ensures that the elastomer pipe cannot be removed from the rigid end piece in a nondestructive manner.
To this end, it is known to connect the elastomer pipe to the rigid end piece and to crimp, around the coupled portion, a metallic sleeve which maintains a certain compression of the elastomer pipe on the tubular end piece.
However, depending on the particular stresses of the target application, the pull-off resistance of the elastomer pipe proves insufficient.
This problem occurs in particular when the rigid end piece is smooth, for example when it is obtained by extrusion, drawing, rolling-welding, swaging, casting.
A local deformation of the end piece could be envisaged, to form, for example, a relief bead in order to better retain the elastomer pipe.
However, the formation of such a bead involves an operation following the production of the end piece and the supply of a specific forming tool, which is detrimental in terms of cost and industrial application. The invention therefore aims to devise a coupling which makes it possible to obtain a better resistance of the elastomer pipe in a pulling direction with respect to the tubular end piece.
Another aim of the invention is also to provide such a coupling which is easy and inexpensive to use in industrial conditions.
BRIEF DESCRIPTION OF THE INVENTION
In accordance with the invention, there is proposed a nozzle comprising an elastomer pipe coupled to a tubular end piece made of a rigid synthetic material in a non-removable manner, said pipe surrounding the end piece along a coupling region.
The term "non-removable" should be understood in this text to mean that the components of the nozzle are not intended to be removed after they have been assembled, and that removal is possible only in a destructive manner.
Said nozzle is characterized in that it comprises, in the coupling region, a ring crimped onto the tubular end piece, the internal wall of said ring being provided with at least one cutting edge and the external wall of said ring being provided with at least one retaining element for the elastomer pipe.
According to other advantageous features of the invention, considered alone or in combination:
- the internal wall of the ring has a concave profile;
- the cutting edge is situated on the side of the end of the end piece;
- the tubular end piece is made of a synthetic, composite and/or metallic rigid material;
- the tubular end piece comprises, in the coupling region, a reinforcing insert in the case where the end piece is made of a synthetic and/or composite material;
- the nozzle comprises a crimping sleeve crimped around the elastomer pipe in the coupling region;
- the tubular end piece is made of an extruded material, preferably polyamide.
Another object of the invention relates to a method for coupling a pipe made of elastomer material and a tubular end piece made of a rigid synthetic material in a non- removable manner, said pipe surrounding the end piece along a coupling region, characterized in that it comprises the following steps:
(a) fitting, in the coupling region, on the tubular end piece, a ring whose internal wall is provided with at least one cutting edge, the ring being crimped onto the end piece so that the cutting edge penetrates into the external wall of the end piece;
(b) introducing the tubular end piece and the ring into the elastomer pipe. Advantageously, the step (a) for fitting the ring includes pressing the portion of the ring opposite the cutting edge against a retaining element and applying, against the ring, a tool having a tapered internal shape so as to deform the ring.
Preferably, when the end piece is made of a synthetic or composite material, said method also comprises, before the step (a) for fitting the ring, a step for introducing a reinforcing insert into the tubular end piece in the coupling region.
Moreover, said method advantageously comprises a step for crimping a sleeve in the coupling region around the elastomer pipe. BRIEF DESCRIPTION OF THE DRAWINGS
Other features and advantages of the invention will become apparent from the following detailed description, with reference to the appended figures in which:
- Figure 1 shows a partial cross-sectional view of a nozzle according to the invention;
- Figures 2a and 2b illustrate the tool for fitting the ring onto the end piece, respectively in perspective and in cross section.
DETAILED DESCRIPTION OF THE INVENTION
With reference to Figure 1 , the nozzle 1 comprises an elastomer pipe 2 coupled to a tubular end piece 3 by surrounding said end piece along a so-called coupling region.
The pipe 2 is typically an extruded pipe made of an elastomer material, such as, for example, rubber, NBR, silicone, Teflon®.
The tubular end piece 3 is made of a rigid synthetic material, such as, for example, polyamide, polyethylene or even a composite material.
The end piece 3 may also belong to a metal tube consisting of a ferrous or non-ferrous metal.
The tubular end piece is typically the end of an extruded, drawn, swaged, cast or stretched rigid tube; because of this, its external wall is smooth and notably does not include any relief that can constitute a retaining means for the elastomer pipe.
The non-removable coupling of the elastomer pipe 2 to the rigid end piece 3 is obtained by fitting, onto the tubular end piece 3 and in the coupling region, a ring 4 whose internal wall is provided with at least one cutting edge and whose external wall has at least one relief 41 that makes it possible to retain the elastomer pipe.
In the embodiment illustrated in Figure 1 , the ring 4 comprises a first cutting edge 42 arranged on the internal wall 44 of the ring, and a second cutting edge 43 situated at the end of the internal wall of the ring, the two edges being separated by a shoulder, so that the internal diameter of the first edge 42 is less than the internal diameter of the second edge 43.
Preferably, the cutting edges are positioned on the side of the end of the end piece 3.
However, the invention is not limited to this particular ring geometry but can be implemented in a ring provided with at least one cutting edge on its internal wall.
Such a ring is usually employed in the cutting ring couplings which are used for leak- tight connections in hydraulic pipelines.1
This type of ring is therefore available on the market in large quantities and at low cost.
Said cutting ring 4 is made of metal material, for example steel of 9SMnPb28K type.
For the ring 4 to remain fastened to the end piece 3, it is crimped onto the end piece 3. This crimping causes the cutting edges 42, 43 to penetrate into the external wall of the end piece 3.
The ring 4 preferably has an internal diameter slightly less than the external diameter of the end piece 3, in particular at the level of the cutting edge 42.
Preferably, the internal wall 44 of the ring 4 is not straight but advantageously has a concave profile, which allows for a better penetration of the edges 42, 43 into the external wall of the end piece 3.
The operation for assembly of the ring 4 on the end piece 3 is performed by deformation using a tool 1 10 having a tapered internal shape 1 1 1 and a retaining element 100, for example in the form of a plate, which are represented in Figure 2a.
As illustrated in Figure 2b, the ring 4 is introduced onto the end piece 3.
The deformation is obtained by placing the end piece 3 in an opening 101 of the retaining plate 100 so that the rear portion of the ring 4 (i.e., the portion opposite the cutting edge 42) is pressed against the plate 100.
The tapered tool 1 10 is then advanced over the end piece 3 in the direction of the arrow so as to apply a force onto the ring 4.
The ring 4 is deformed by closing onto the end piece 3, the cutting edge 42 penetrating into the external wall of the end piece 3.
To avoid the deformation and creep of the end piece 3 under the effect of the crimping of the ring 4, when the end piece is made of a synthetic and/or composite material, a reinforcing insert 5 is advantageously first inserted into the end piece 3, in the coupling region.
The insert 5 is typically a metallic insert whose dimensions are designed to avoid the possibility of the end piece being extracted once it has been inserted therein.
1 Can you explain how these couplings work? Once the ring 4 is fitted and crimped onto the end piece 3, the assembly is introduced into the elastomer pipe 2, which is preferably surrounded, in the coupling region, with a retaining sleeve 6.
The sleeve 6 is then crimped around the coupling region.
In particular, an intermediate portion of the sleeve 6 is deformed to restrict its section, so that its internal diameter is less than the external diameter of the pipe 2.
The pipe 2 is therefore compressed against the end piece 3.
Moreover, the retaining element 41 of the ring 4, which is advantageously positioned between the end of the tubular end piece 3 and the section restriction of the sleeve 6, allows for a better retention of the pipe relative to the end piece.
When a pulling force is exerted on the newly assembled nozzle 1 , the ring 4 is braced on the end piece 3 by virtue of its cutting edge or edges.
A nozzle is thus obtained whose pulling strength is enhanced2 without its manufacturing cost being significantly increased.
2 Do you have results?

Claims

1. Nozzle (1 ) comprising an elastomer pipe (2) coupled to a rigid tubular end piece (3) in a non-removable manner, said pipe (2) surrounding the end piece (3) along a coupling region, characterized in that it comprises, in the coupling region, a ring (4) crimped onto the tubular end piece (3), the internal wall (44) of said ring (4) being provided with at least one cutting edge (42, 43) and the external wall of said ring being provided with at least one retaining element (41 ) for the elastomer pipe.
2. Nozzle (1 ) according to Claim 1 , characterized in that the internal wall (44) of the ring (4) has a concave profile.
3. Nozzle (1 ) according to either of Claims 1 and 2, characterized in that the cutting edge (42, 43) is positioned on the side of the end of the end piece (3).
4. Nozzle (1 ) according to either of Claims 1 and 2, characterized in that the tubular end piece (3) is made of a synthetic, composite and/or metallic rigid material.
5. Nozzle (1 ) according to Claim 3, characterized in that the tubular end piece (3) is made of a synthetic and/or composite material and in that it comprises, in the coupling region, a reinforcing insert (5).
6. Nozzle (1 ) according to one of Claims 1 to 4, characterized in that it comprises a sleeve (6) crimped around the elastomer pipe (2) in the coupling region.
7. Nozzle (1 ) according to one of Claims 1 to 5, characterized in that the tubular end piece (3) is made of an extruded material, preferably polyamide.
8. Method for coupling a pipe made of elastomer material (2) and a rigid tubular end piece (3) in a non-removable manner, said pipe (2) surrounding the end piece (3) along a coupling region, characterized in that it comprises the following steps:
(a) fitting, in the coupling region, on the tubular end piece (3), a ring (4) whose internal wall (44) is provided with at least one cutting edge (42, 43), the ring (4) being crimped onto the end piece (3) so that the cutting edge (42, 43) penetrates into the external wall of the end piece (3); (b) introducing the tubular end piece (3) and the ring (4) into the elastomer pipe (2).
9. Method according to Claim 7, characterized in that the step (a) for fitting the ring (4) includes pressing the portion of the ring (4) opposite the cutting edge (42, 43) against a retaining element (100) and applying, against the ring (4), a tool (1 10) having a tapered internal shape (11 1 ) so as to deform the ring (4).
10. Method according to either of Claims 8 and 9, characterized in that the end piece (3) is made of a synthetic or composite material and in that the method also comprises, before the step (a) for fitting the ring (4), a step for introducing a reinforcing insert (5) into the tubular end piece (3) in the coupling region.
1 1. Method according to one of Claims 8 to 10, characterized in that it comprises, after the step (b), a step for crimping a sleeve (6) in the coupling region around the elastomer pipe (2).
PCT/EP2012/060863 2011-07-08 2012-06-08 Coupling an elastomer pipe to a rigid tubular end piece in a non-removable manner WO2013007457A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1156215A FR2977652B1 (en) 2011-07-08 2011-07-08 UNEMPLOYABLE CONNECTION OF ELASTOMERIC PIPE TO RIGID TUBULAR BIT
FR1156215 2011-07-08

Publications (1)

Publication Number Publication Date
WO2013007457A1 true WO2013007457A1 (en) 2013-01-17

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ID=46354191

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PCT/EP2012/060863 WO2013007457A1 (en) 2011-07-08 2012-06-08 Coupling an elastomer pipe to a rigid tubular end piece in a non-removable manner

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WO (1) WO2013007457A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3444515A1 (en) * 2017-08-16 2019-02-20 Mann + Hummel Gmbh Air intake sealing joint arrangement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431919A (en) * 1935-01-29 1935-07-17 George Carpenter A new or improved method of and means for connecting hose to fittings or coupling lengths of hose together
US4018462A (en) * 1975-10-31 1977-04-19 Hitachi Metals, Ltd. Pipe fitting
EP1291568A1 (en) * 2001-09-06 2003-03-12 Comap Quick-acting coupling for deformable pipes
DE202004002138U1 (en) * 2004-02-12 2005-06-30 Viega Gmbh & Co. Kg Press-fit sleeve union for copper, steel or plastic gas pipe has inner cutting embedded in one of the pipes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431919A (en) * 1935-01-29 1935-07-17 George Carpenter A new or improved method of and means for connecting hose to fittings or coupling lengths of hose together
US4018462A (en) * 1975-10-31 1977-04-19 Hitachi Metals, Ltd. Pipe fitting
EP1291568A1 (en) * 2001-09-06 2003-03-12 Comap Quick-acting coupling for deformable pipes
DE202004002138U1 (en) * 2004-02-12 2005-06-30 Viega Gmbh & Co. Kg Press-fit sleeve union for copper, steel or plastic gas pipe has inner cutting embedded in one of the pipes

Also Published As

Publication number Publication date
FR2977652A1 (en) 2013-01-11
FR2977652B1 (en) 2014-03-28

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