GB2112483A - Pipe joint - Google Patents
Pipe joint Download PDFInfo
- Publication number
- GB2112483A GB2112483A GB08213669A GB8213669A GB2112483A GB 2112483 A GB2112483 A GB 2112483A GB 08213669 A GB08213669 A GB 08213669A GB 8213669 A GB8213669 A GB 8213669A GB 2112483 A GB2112483 A GB 2112483A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- sleeve
- spigot
- ridges
- slots
- 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- Withdrawn
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
- 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
- F16L33/223—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 the sealing surfaces being pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L33/224—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 the sealing surfaces being pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts a clamping ring being arranged between the threaded member and the connecting member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Sleeves (AREA)
Abstract
A pipe joint for joining a polymeric pipe 5 to another pipe comprises a body 2 formed at one end for connection in known manner to the other pipe and which at its other end has a spigot 3 which may be push fitted within the end of the polymeric pipe 5, there being a split sleeve 15 for fitting over that portion of the polymeric pipe in which the spigot is located, the sleeve being generally wedge shaped with its wide end bearing on an end face 19 of the body and wherein a thrust member, e.g. a nut 11 or a flanged member (not shown) forms a sliding fit over the polymeric pipe for clamping engagement with the body e.g. by screw- threadedly engaging said body, or by connecting the flange, with bolts or clamps, to the body 1 the thrust member being tapered internally at its end outermost and remote from its screw- threaded end, for engaging with the outer periphery 17 of the split sleeve so as to clamp the latter onto the polymeric pipe around the spigot and wherein the external periphery of the spigot and the internal periphery of the sleeve each have at least one groove and/or ridge thereon, there preferably being a plurality of each on each arranged generally annularly and wherein the ridges preferably have rounded tips which may be located either opposite each other or, alternatively, opposite the grooves on the other part of the joint. <IMAGE>
Description
SPECIFICATION
Pipe joint
This invention relates to a pipe joint specifically designed for joining polyethylene or other polymeric, e.g. thermoplastic, pipes to metal pipes. The invention could however, be used for joining two polymeric pipes together, but will hereinafter be described with reference to the joining together of a polyethylene pipe to a metal pipe.
Various types of compression pipe joints are known for joining polyethylene pipes to metal or thermoplastic pipes, one of the best known being ourTalbot joint which incorporates a body having a threaded end for connecting to the metal pipe and a compression end for joining to the polyethylene pipe. At the compression end, a separate serrated insert is located within the end of the polyethylene pipe and a male thrust nut is then located around the end of the polyethylene pipe and engaged within an enlarged female end of the joint body, which female end extends in the opposite direction from the threaded end for the connection to the metal pipe.
Located within the female end and around the end portion of the polyethylene pipe are an elastomeric, e.g. nitrile, compression ring and a friction washer which may be made of polypropylene. The thrust nut is screwed down into the female end so that the compression ring is compressed and, being confined by the female end, it expands radially inwards so as firmly to clamp the end of the polyethylene pipe onto the serrated inserts. This type of joint can be formed in the trench using standard tools and does not require any solvent welding or heating and produces a joint which is stronger than the polyethylene pipe itself. The joint can be used in water pipelines and gas pipelines.The design relies on a seal being achieved through direct contact between the fluid contained in the pipeline and an elastomeric compression ring which limits the application to elastomeric seal materials inert to the contained fluid.
Another known pipe joint suitable for connecting polyethylene to metal pipes is that the subject of
U.K. Patent No. 1596112. This incorporates a male body threaded at one end for connection to the metal pipe and serrated at its other end for insertion within the end of a polyethylene pipe. The serrated end has to be forced under pressure into the polyethylene pipe and a sleeve is then forced over the end of the polyethylene pipe so as to deform the interior of the polyethylene pipe and clamp its end between the internal periphery of the sleeve and the said serrated end. While this joint is applicable both for water pipelines and gas pipelines, it suffers from a major disadvantage in that a special tool is required to force the sleeve over the end of the polyethylene pipe and sandwich the end of the polyethylene pipe between the sleeve and the serrated end.
A yet further known type of metal to polyethylene joint is in the form of a specially formed sleeve, one end of which is connected in traditional manner to the end of the metal pipe and the other end of which is designed to receive the end of a polyethylene pipe.
Located within a recess within the sleeve is an elastomeric O-ring and a slidable sleeve, the outer periphery of which engages with a tapered face within the sleeve. The slidable sleeve has a serrated inner surface and in use, the end of the polyethylene pipe is pushed into the sleeve through the slidable sleeve and the O-ring up against a stop. The polyethylene pipe is then pulled backwardly causing the slidable sleeve, which is a split sleeve, to bear against the tapered face of the main sleeve so as firmly to clamp the serrations on its internal periphery into engagement with the polyethylene pipe. This prevents the polyethylene pipe from pulling out of the main sleeve and the O-ring provides a seal. A reasonably satisfactory joint is achieved but again this joint is limited to joints which do not attack the elastomeric seal.Also, the seal mechanism for gripping the plastic pipe requires backward movement of the plastics pipe, which may not be permissable when joining mechanically constrained or underground plastics pipes without distortion occurring. Also, the joint is considered by some to be inferior in that the internal periphery of the polyethylene pipe is unsupported and it is believed that in time the polyethylene pipe might cold creep and as a result the joint will loosen and leak. There is no means of positively controlling with a spanner the clamping force in this type of joint.
A modification of the joint described above is available and incorporates a tapered clamping nut which forces the split clamping sleeve onto the external periphery of the polyethylene pipe. Again, however, this incorporates elastomeric components and does not have any internal support for the polyethylene pipe.
A yet further joint which can be used for joining polyethylene pipes to metal pipes is a modified version of the joint the subject of British Standard 864. This joint is somewhat similar to the Talbot joint described above but the end connectable to the polyethylene pipe has an integral plain insert which is located within the end of the polyethylene pipe and the thrust nut defines with the external periphery of the end of the polyethylene pipe a compression chamber in which a metal or nylon compression ring is located. As the thrust nut is tightened, so the compression ring is deformed so that its two end portions bite into the external periphery of the polyethylene pipe.This joint is not always acceptable as the compression ring is formed of elastomeric material, but even if it is formed of copper or some other metal, the joint may be suspect under high tension loads since the insert is a plain insert.
We have now developed a polyethylene to metal pipe joint which overcomes the disadvantages of all the above-described joints.
According to the present invention, we provide a joint for joining a pipe formed of synthetic resinous, i.e. polymeric, material, such as polyethylene and hereinafter referred to as a polyethylene pipe, to another pipe formed of metal or of any other material, the joint having a body which is threaded or otherwise formed at one end for connection in known manner to the other pipe and which, at its other end, has a spigot for insertion by means of a push fit within the end of a polyethylene pipe, there being a split sleeve arranged to fit over that portion of the end of the polyethylene pipe in which the spigot is located, the sleeve being wedge shaped in cross section with the wide end of the wedge arranged to bear on an end face of the body and wherein a thrust nut is arranged slidablyto be located over the end portion of the polyethylene pipe and to form screw-threaded engagement with said body, said thrust nut at its end remote from its screw-threaded end having a tapered internal periphery for engaging with the outer periphery of the split sleeve so that on tightening said nut the sleeve will clamp the end portion of the polyethylene pipe between its internal periphery and the external periphery of the spigot, the external periphery of the spigot and internal periphery of the sleeve having at least one groove and/or ridge formed thereon.
Preferably, each has a plurality of grooves and ridges.
Preferably, the grooves and ridges are annularly and not helically arranged. While it is envisaged that the grooves and ridges may have a serrated or toothlike cross section so as to bite into the end of the polyethylene pipe during the clamping operation, it is preferred that the tips of the ridges have a generally rounded configuration so as not to cut into the end of the pipe. The ridges and grooves on the spigot are preferably so located relative to the ridges and grooves on the split clamping sleeve that in use the ridges on the spigot will be located opposite the grooves on the clamping sleeve and vice-versa so thatthe ridges on one part will deform the material of the polyethylene pipe into the grooves on the other part.
Alternatively, the ridges and grooves may be so arranged on the spigot and split sleeve such that in use the two sets of ridges and the two sets of grooves are opposite each other. Alternatively, they may be offset in any intermediate position. Normally, the end of the polyethylene pipe would bear against the end face on the body, but in a modification a recess may be provided in this end face, into which recess the end of the polyethylene pipe is located, so that the split sleeve does not grip the very end of the polyethylene pipe.
In a preferred arrangement, the split sleeve does not have a complete split, either straight or stepped, passing axially totally through the sleeve, but instead, the sleeve has a plurality of generally axial slots formed therein, some of the slots extending into the sleeve from the wide end of the sleeve and some from the narrow end, and all the slots extending axially beyond the middle of the sleeve, so that those from one end extend beyond those from the other end.
Preferably, the generally axial slots are generally parallel axially to each other, and are equally spaced from each other, and extend axially approximately five-sixths of the total way through the sleeve. It is envisaged, however, that the slots could be inclined to the longitudinal axis of the sleeve, and to radii of the sleeve, i.e. they could be on "skew" both axially and radially. Preferably, the slots extending from one end alternate with those extending from the other end. Preferably, the width of the slots is between one-third and one-quarter of the width of "lands" between adjacent slots, which lands may be bout " wide. The number of slots depends on the circumference of the sleeve, and the optimum width for each size of sleeve.
It will thus be appreciated that in this embodiment of sleeve, the sleeve becomes a series of segments or lands, each partly connected to the other only at one end so as to form a continuous but radially flexible ring. This flexibility confers and easier and more uniform radial compression onto the pipe to be connected whilst still retaining rigidity in the axial direction, both being desired features of the joint.
The multiplicity of slots permits a circumferential reduction under radial compression which could not be so satisfactorily achieved with a single split in the sleeve. The equivalent width of a single split or cut in the sleeve as in the previous embodiment leaves an area of pipe unsupported at the commencement of making the joint, resulting in the pipe deforming into this gap as it closes under radial compression, effectively resisting further closure and preventing uniform compression around the whole periphery of the pipe.
Polyethylene to metal pipe joints according to the present invention are now described by way of example with reference to the accompanying drawings, in which:
Figure 1 is a half section, to an enlarged scale, through part of the joint, and
Figure 2 is a perspective view of a preferred modified, split sleeve.
Referring to the drawings and particularly to
Figure 1, the pipe joint comprises a generally cylindrical body 1 formed at one end (not shown) with known means for connecting the body to a metal pipe (or any other type of pipe). If a polyethylene to polyethylene joint is required, both ends may be in accordance with this invention. At its other end the body is provided with a male spigot 3 arranged to fit within the end of a polyethylene pipe 5 to be joined to the metal pipe. The body 1 has an external screwthread 7 arranged to be screwthreadedly engaged by a mating female thread 9 on a wedge nut 11.
The end portion remote from the thread 9 of the internal periphery of the wedge nut 11 is tapered as shown at 13 so as to be narrowest at its end remote from the thread 9. Associated with the tapered portion 13 of the nut 1 1 is a split sleeve 15, the external periphery of which is tapered as shown at 17 so as generally to match the taper 13 on the nut 11. An end face 19 is provided on the body 1 between the spigot 3 and thread 7, the arrangement being such that in use the end of the pipe 5 and the split sleeve 5 rest upon this end face.
In a modified construction, not shown, a recess is provided in this end face, in which the end of the polyethylene pipe is located.
The external periphery of the spigot 3 has a plurality of ridges 21 spaced apart by grooves 23.
Likewise, the internal periphery of the split sleeve 15 is formed of ridges 25 spaced apart by grooves 27.
The tips of the ridges and the base of the grooves are shown as smooth. Other configurations are possible.
As shown, the shape and spacing of the ridges 21 and grooves 23 match those of the ridges 25 and grooves 27 although the ridges 25 on the sleeve are arranged opposite the grooves 23 on the spigot. It will be appreciated, however, that any other arrangement is possible provided that ridges and grooves are provided both on the spigot and on the sleeve.
When it is desired to join the polyethylene pipe 5 to the metal pipe (not shown), the body 1 is connected to the metal pipe in known manner and either before or after this operation or at the same time, the split sleeve 15 is located in place in the joint and held there by assembling the nut 11 on the body 1 loosely. The spigot 3 is then located within the end of the pipe 5 so that the pipe is sandwiched between the spigot and the internal periphery of the sleeve 15 between the spigot and the internal periphery of the sleeve 15. The nut 11 is then tightened up thus forcing its tapered face 13 against the tapered periphery 17 of the sleeve and this in turn will cause the sleeve to move radially inwards so as tightly to grip the end of the pipe 5 between itself and the spigot 3.Due to the presence of the ridges 21 and 25 on the spigot and sleeve respectively, clamping forces will be applied to the end of the pipe 5, the effect of which will be slightly to distort the end of the pipe 5. The manner of this distortion and the degree of distortion will of course depend upon the precise nature and arrangement and relative orientation of the ridges and grooves on the spigot and sleeve.
In a modified construction with the recess, it will be appreciated that these clamping forces act on the pipe at a location spaced a short distance from the end of the pipe.
If desired, the split in the sleeve 15 may be stepped so that at all times a clamping force is provided around the whole periphery of the pipe 5.
Referring now to Figure 2, in which a preferred construction of split sleeve is illustrated, the sleeve 15, as in the previous embodiment, has a plurality of ridges 25 and grooves 27. Extending axially into the sleeve 15 from its narrow end 29 are a plurality of generally parallel, axially extending spaced slots 31, and likewise, a plurality of further parallel spaced slots 33 extend into the sleeve 15 from its wide end 35. Both sets of slots are generally parallel axially to each other, and extend about five-sixths of the way through the sleeve, leaving segments or lands 37 about " wide between adjacent slots. There are approximately three or four times the width of the slots 31,33. The slots extend generally radially.
Alternatively, the slots may be inclined to the longitudinal axis of the sleeve although they would normally be generally parallel to each other. Also, instead of being generally radial, either with parallel or slightly diverging side walls, the slots may be inclined to radial lines drawn from the centre of the sleeve, i.e. the slots may be on the skew, both radially and axially.
The above described pipe joints can be used for water or gas. Normally, all the components of the joints will be made of metal although in most
pipelines at least the split sleeve could be made of a
plastics material.
It will thus be seen that a continuous, but radially
expandable/flexible sleeve is provided, which is generally rigid in the axial direction. When com
pressed onto a pipe, this deforms uniformly and
provides a uniform radial force around the total
periphery of the pipe.
By manufacturing the joint as described above, a controlled clamping force can be applied to the polyethylene pipe 5 and by making the ridges 21 and 25 with rounded tips, it is ensured that cutting of the pipe 5 does not occur. The presence of the spigot 3 ensures that the fluid seal is made directly between the joint body and the polyethylene or other synthetic resinous, i.e. polymeric, e.g. thermoplastic, pipe without recourse to an elastomeric seal when the joint is tightened.
Polymeric pipes can be simply inserted into the loosened joint by hand without disassembly of the joint and then be controllably gripped and sealed by tightening the nut 11 either by means of a simple spanner or by a torque spanner if precisely applied compression is required.
Such a joint may simply be made in a mechanically constrained configuration, for example, a trench, without the disadvantage of backward movement and distortion of the pipeline.
The joint is particularly suitable for gas applications or for any application in which the material of the joint body and the thermoplastic pipe is inert to the contained fluid.
Obviously, the joint can be used not just for a polyethylene to metal joint, but for connecting any polymeric pipe to any other pipe.
CLAIMS (filed on 16Dec.82) 1. Ajointforjoining a pipe formed of synthetic resinous, i.e. polymeric, material, such as polyethylene and hereinafter referred to as a polyethylene pipe, to another pipe formed of metal or of any other material, the joint having a body which is threaded or otherwise formed at one end for connection in known manner to the other pipe and which, at its other end, has a spigot for insertion by means of a push fit within the end of a polyethylene pipe, there being a plit sleeve arranged to fit over that portion of the end of the polyethylene pipe in which the spigot is located, the sleeve being wedge shaped in cross section with the wide end of the wedge arranged to bear on an end face of the body and wherein a thrust member is arranged slideably to be located over the end portion of the polyethylene pipe for clamping engagement with said body, said thrust member at its outermost end having a tapered internal periphery for engaging with the outer periphery of the split sleeve so that on clamping said member, the sleeve will clamp the end portion of the polyethylene pipe between its internal periphery and the external periphery of the spigot, the external periphery of the spigot and internal periphery of the sleeve having at least one groove and/or ridge formed thereon.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (16)
1. Ajointforjoining a pipe formed of synthetic resinous, i.e. polymeric, material, such as polyethylene and hereinafter referred to as a polyethylene pipe, to another pipe formed of metal or of any other material, the joint having a body which is threaded or otherwise formed at one end for connection in known manner to the other pipe and which, at its other end, has a spigot for insertion by means of a push fit within the end of a polyethylene pipe, there being a plit sleeve arranged to fit over that portion of the end of the polyethylene pipe in which the spigot is located, the sleeve being wedge shaped in cross section with the wide end of the wedge arranged to bear on an end face of the body and wherein a thrust member is arranged slideably to be located over the end portion of the polyethylene pipe for clamping engagement with said body, said thrust member at its outermost end having a tapered internal periphery for engaging with the outer periphery of the split sleeve so that on clamping said member, the sleeve will clamp the end portion of the polyethylene pipe between its internal periphery and the external periphery of the spigot, the external periphery of the spigot and internal periphery of the sleeve having at least one groove and/or ridge formed thereon.
2. A pipe joint according to claim 1 wherein both the external periphery of the spigot and the internal periphery of the sleeve have a plurality of grooves and ridges.
3. A pipe joint according to claim 2 wherein the grooves and ridges are arranged annularly.
4. A pipe joint according to any one of claims 2 and 3 wherein the tips of the ridges have a generally rounded configuration.
5. A pipe joint according to any one of claims 2 to 4 wherein the ridges and grooves on the spigot are so located relative to the grooves and ridges on the split clamping sleeve that in use the ridges on the spigot will be located opposite the grooves on the clamping sleeve and vice-versa.
6. A pipe joint according to any one of claims 1 to 4wherein the ridges and grooves are so arranged on the spigot and split sleeve that in use the two sets of ridges and two sets of grooves are opposite each other.
7. A pipe joint according to any one of the preceding claims wherein the end of the polyethylene pipe bears against the end face of the body.
8. A pipe joint according to any one of claims 1 to 6 wherein a recess is provided in the end face on the body for receiving the end of the polyethylene pipe.
9. A pipe joint according to any one of the preceding claims wherein the split sleeve has a plurality of generally axial slots formed therein, some of the slots extending into the sleeve from the wide end of the sleeve and some from the narrow end all of the slots extending axially beyond the middle of the sleeve.
10. A pipe joint according to claim 9 wherein the generally axial slots are generally parallel axially to each other and are equally spaced from each other and extend axially approximately five-sixths of the total length of the sleeve.
11. A pipe joint according to any one of claims 1 to 9 wherein the slots are inclined to the longitudinal axis of the sleeve.
12. A pipe joint according to any one of claims 1 to 11 wherein the slots are inclined to the radii of the sleeve.
13. A pipe joint according to any one of claims 10 to 12 wherein the slots extending from one end alternate with those extending from the other end of the sleeve.
14. A pipe joint according to any one of claims 10 to 13 wherein the width of the slots is between a third and a quarter of the width of the "lands" between adjacent slots.
15. A pipe joint according to any one of claims 1 to 8 wherein the split in the sleeve is stepped.
16. A pipe joint substantially as hereinbefore described with reference to Figure 1 or Figure 2 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08213669A GB2112483A (en) | 1981-12-30 | 1982-05-11 | Pipe joint |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8139069 | 1981-12-30 | ||
| GB08213669A GB2112483A (en) | 1981-12-30 | 1982-05-11 | Pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2112483A true GB2112483A (en) | 1983-07-20 |
Family
ID=26281637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08213669A Withdrawn GB2112483A (en) | 1981-12-30 | 1982-05-11 | Pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2112483A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339155A1 (en) * | 1988-03-08 | 1989-11-02 | Bridgestone Flowtech Corporation | Hose connection assembly |
| WO1998001695A1 (en) * | 1996-07-10 | 1998-01-15 | Kang Hoon Park | Synthetic resin hose connecting means |
| EP0879982A2 (en) * | 1997-05-23 | 1998-11-25 | INNOTRADE Entwicklungs- und Vertriebsgesmbh | Rotary drive coupling, fire hose coupling and hose clamping device |
| WO1999031425A1 (en) * | 1997-12-16 | 1999-06-24 | Festo Ag & Co. | Coupling device for hydraulic lines |
| EP1618328A2 (en) * | 2003-04-29 | 2006-01-25 | THC International LLC | A joint assembly for flexible and semi-rigid pipings |
| CN106402548A (en) * | 2016-12-20 | 2017-02-15 | 浙江省新昌县华佳国财塑胶有限公司 | Flexible-pipe adapter connector |
| CN108386637A (en) * | 2018-05-24 | 2018-08-10 | 嘉兴宸轩管件制造科技有限公司 | A kind of modified form pipe fitting |
| CN108488519A (en) * | 2018-05-24 | 2018-09-04 | 嘉兴宸轩管件制造科技有限公司 | A kind of multifunctional pipe connection |
| CN108506621A (en) * | 2018-05-24 | 2018-09-07 | 嘉兴宸轩管件制造科技有限公司 | A kind of reusable pipe fitting |
| EP4011788A1 (en) * | 2020-12-10 | 2022-06-15 | IWK Verpackungstechnik GmbH | Tube holder |
| US20230084846A1 (en) * | 2019-02-10 | 2023-03-16 | Axxiom Manufacturing, Inc. | Quick connector for end-to-end coupling of industrial conduit sections |
-
1982
- 1982-05-11 GB GB08213669A patent/GB2112483A/en not_active Withdrawn
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0339155A1 (en) * | 1988-03-08 | 1989-11-02 | Bridgestone Flowtech Corporation | Hose connection assembly |
| WO1998001695A1 (en) * | 1996-07-10 | 1998-01-15 | Kang Hoon Park | Synthetic resin hose connecting means |
| EP0879982A2 (en) * | 1997-05-23 | 1998-11-25 | INNOTRADE Entwicklungs- und Vertriebsgesmbh | Rotary drive coupling, fire hose coupling and hose clamping device |
| EP0879982A3 (en) * | 1997-05-23 | 1999-10-27 | INNOTRADE Entwicklungs- und Vertriebsgesmbh | Rotary drive coupling, fire hose coupling and hose clamping device |
| WO1999031425A1 (en) * | 1997-12-16 | 1999-06-24 | Festo Ag & Co. | Coupling device for hydraulic lines |
| US7661721B2 (en) | 2003-04-29 | 2010-02-16 | Tecnologia Hidraulica Thc S.A. | Joint assembly for flexible and semi-rigid pipings |
| EP1618328A4 (en) * | 2003-04-29 | 2006-07-05 | Thc Internat Llc | A joint assembly for flexible and semi-rigid pipings |
| US7341284B2 (en) | 2003-04-29 | 2008-03-11 | Tecnologia Hidraulica Thc S.A. | Joint assembly for flexible and semi-rigid pipings |
| EP1618328A2 (en) * | 2003-04-29 | 2006-01-25 | THC International LLC | A joint assembly for flexible and semi-rigid pipings |
| CN106402548A (en) * | 2016-12-20 | 2017-02-15 | 浙江省新昌县华佳国财塑胶有限公司 | Flexible-pipe adapter connector |
| CN108506621A (en) * | 2018-05-24 | 2018-09-07 | 嘉兴宸轩管件制造科技有限公司 | A kind of reusable pipe fitting |
| CN108488519A (en) * | 2018-05-24 | 2018-09-04 | 嘉兴宸轩管件制造科技有限公司 | A kind of multifunctional pipe connection |
| CN108386637A (en) * | 2018-05-24 | 2018-08-10 | 嘉兴宸轩管件制造科技有限公司 | A kind of modified form pipe fitting |
| CN108488519B (en) * | 2018-05-24 | 2023-07-25 | 嘉兴宸轩管件制造科技有限公司 | Multifunctional pipe joint |
| CN108386637B (en) * | 2018-05-24 | 2023-07-25 | 嘉兴宸轩管件制造科技有限公司 | Improved pipe joint |
| CN108506621B (en) * | 2018-05-24 | 2023-07-25 | 嘉兴宸轩管件制造科技有限公司 | Reusable pipe joint |
| US20230084846A1 (en) * | 2019-02-10 | 2023-03-16 | Axxiom Manufacturing, Inc. | Quick connector for end-to-end coupling of industrial conduit sections |
| US11994247B2 (en) * | 2019-02-10 | 2024-05-28 | Axxiom Manufacturing, Inc. | Quick connector for end-to-end coupling of industrial conduit sections |
| EP4011788A1 (en) * | 2020-12-10 | 2022-06-15 | IWK Verpackungstechnik GmbH | Tube holder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |