GB2466098A - Compression fitting with internal ribs that engage tube - Google Patents

Compression fitting with internal ribs that engage tube Download PDF

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Publication number
GB2466098A
GB2466098A GB0916438A GB0916438A GB2466098A GB 2466098 A GB2466098 A GB 2466098A GB 0916438 A GB0916438 A GB 0916438A GB 0916438 A GB0916438 A GB 0916438A GB 2466098 A GB2466098 A GB 2466098A
Authority
GB
United Kingdom
Prior art keywords
inner body
collar
tube
coupling according
coupling
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
GB0916438A
Other versions
GB2466098B (en
GB0916438D0 (en
Inventor
Spencer Nicholson
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.)
Parker Hannifin Manufacturing Ltd
Original Assignee
Parker Hannifin PLC
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
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Priority claimed from GBGB0503954.0A external-priority patent/GB0503954D0/en
Application filed by Parker Hannifin PLC filed Critical Parker Hannifin PLC
Publication of GB0916438D0 publication Critical patent/GB0916438D0/en
Publication of GB2466098A publication Critical patent/GB2466098A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/007Joints with sleeve or socket clamped by a wedging action
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/146Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling by an axially moveable sleeve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
    • F16L19/14Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered the rings being integral with one of the connecting parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00Joints with sleeve or socket
    • F16L21/08Joints with sleeve or socket with additional locking means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00Couplings of the quick-acting type
    • F16L37/08Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/12Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
    • F16L37/138Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members using an axially movable sleeve
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49925Inward deformation of aperture or hollow body wall
    • Y10T29/49927Hollow body is axially joined cup or tube
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49925Inward deformation of aperture or hollow body wall
    • Y10T29/49934Inward deformation of aperture or hollow body wall by axially applying force

Abstract

A coupling for attaching to an end of a tube, pipe, conduit or other round solid or hollow section is disclosed. The coupling comprises an inner body and a collar to be provided around the inner body. The inner body has an external inclined surface 1, an interior bore passing through at least a portion thereof to receive a tube and the bore has one or more interior annular protuberances 5. The collar has an internal inclined surface (9, Figure 3) to co-act with surface 1 of the inner body to provide the compressive force. In use the collar and inner body are movable from a less engaged position to a more engaged position by an axial force so inclined surfaces 1, (9) co-act to apply a compressive force and deform the inner body such that the one or more annular protuberances 5 engage the tube to seal with it.

Description

A COUPLING.
The present invention relates to a coupling for attaching tubes, pipes, conduits and other round sections to other such items andlor other systems.
Initially this invention has been developed within the instrumentation tube fittings industry. However, the invention is capable of being utilised within many other applications outside of this environment. Other applications may include shipbuilding, aerospace, automotive, pipe connections, and construction using wire e.g. suspension bridges.
At present a commonly used connector is a ferrule compression fitting comprising one or more ferrules to be threaded over a tube or the like and a tightening device to cause the one or more ferrules to grip the outside of the tube or the like to provide a seal against leakage.
GB 928,715 and US 6,131,963 show examples of twin ferrule connectors. WO 2005/019716 discloses a tube fitting for a tube end, the tube fitting comprising a body with an interior bore to receive a tube end and a collar to be threadably coupled onto the body. The collar includes an integral tube gripping ring that co-operates with a camming surface on the body when the collar is threaded onto the body to force the ring to plastically deform into the tube end. WO 2005/019717 discloses a tube fitting for a tube end, the tube fitting comprising a female *,*, threaded coupling member and a male threaded coupling member that are threaded together to :* assemble the fitting onto a tube end. Whilst being threaded together, a ferrule is detached from the female threaded coupling to form a separate ferrule fitting which is plastically *::: : deformed against the outer wall of the tube end and forms seals with the male coupling member and the tube end.
The following problems are associated with these designs and a variety of methods : have been used in the past to overcome these issues.
*: 2 * The design relies on the use of controlled material specifications to ensure that the ferrules have enhanced mechanical properties over that of the tube.
* The rear ferrule is treated by one of many processes to enhance the surface hardness.
This in itself can cause issues as traditional hardening methods such as nitriding induces carbon into the material, which reduces the surfaces corrosion resistance.
* Tube selection is critical within the design. The tubing used with these fittings often has to be purchased with special restrictions of some properties such as skin hardness.
* Incorrect tube preparation can cause major problems within the assembly of the fitting and this is one aspect that the manufacturer has no control over.
* Longitudinal scratches on the tube can cause leak paths with these fittings. Basic tube handling commonly causes these scratches. These minor surface defects are often manually removed prior to assembly, which adds to the assembly time.
* Due to the requirement of enhanced materials it is accepted that compression fittings manufactured from austenitic stainless steel are not suitable for use within certain environments and do not comply with the NACE standards.
* The method used to assemble a tube into a compression fitting relies on the end user adjusting the fitting until tube grip is achieved such as by using a threaded connection.
This is detected by feel and thus every user will have their own opinion of when this is met. Once this point has been achieved the nut of the fitting is tightened by 1 1/4 turns and not to a specified torque or a dead stop. This is seen by a limitation within certain
fields such as the automotive industry.
Embodiments of the invention disclosed herein provide a new type of coupling which eliminate or alleviate at least some of the above problems.
According to a first aspect of the present invention there is provided a coupling for attaching to an end of a tube, pipe, conduit or other round solid or hollow section, the coupling comprising * an inner body with an interior bore passing through at least a portion thereof to receive a tube or the like, the bore having one or more interior annular protuberances extending into the bore, and *. : a collar to be provided around the inner body to apply a circumferential compressive force to deform the body, such that, in use, when a tube or the like is received in the bore of the body and the collar applies a circumferential compressive force thereto, the body is deformed such that the one or more annular protuberances engage the tube or the like to seal with it.
The coupling requires only two parts reducing manufacturing costs and making assembly straightforward. Furthermore as the body, which has one or more interior annular protuberances which extend into the bore prior to use, is deformed such that the one or more annular protuberances provided thereon are forced into engagement with the tube or like, it has been found that a particularly robust seal is provided. The tube or the like is retained in the inner body providing considerable resistance to being axially withdrawn.
The body preferably has a frusto-conical or cylindrical portion with the bore and one or more interior annular protuberances therein, and is preferably arranged such that the collar may be provided around the frusto-conical or cylindrical portion so that, in use, the frusto-conical or cylindrical portion is deformed by the collar.
As the inner body upon which the annular protuberances are provided is deformed, the annular protuberances can undergo a larger radial displacement than conventional ferrules.
This larger radial displacement enables higher compressive loads to be placed on the tube or the like providing better seals and grip and the coupling can be used with tubes or the like with larger dimensional tolerances than conventional ferrule couplings. Furthermore, the large radial displacement of the annular protuberances compresses the cross-section of the tube or the like where they engage which splays the tube or the like on either side. The splaying of the tube or the like on either side enhances the resistance to withdrawal of the tube or the like from the coupling. The larger radial displacement of the annular protuberances enables the coupling to be used with tube or the like which has not been specially prepared and which may have scratches reducing preparation time for the tube and thus costs.
Furthermore, unlike conventional ferrule fittings, the tube or the like does not need to abut against a stop within the coupling as the protuberances provide such a good seal. This overcomes the need for the end of the tube or the like to be cut precisely square, further reducing preparation time and costs. The larger radial displacement of this coupling compared to conventional ferrule fittings provides larger forces such that the material of the ::: : engaging protuberances does not need to be specially hardened unlike conventional ferrule * 20 fittings. However, the protuberances could, if desired, be hardened for advanced *. : performance. The larger radial displacement of this coupling also ensures that the protuberances engage all points around the circumference of a tube or the like, even when its cross-section is not precisely round. For example a tube or the like with a slightly oval cross-section will be pushed back into shape and a better connection will be made compared to * 25 conventional fittings.
The interior annular protuberances on the inner body may compress the outside of the tube or like to which it is fitted. However, the interior annular protuberances preferably have a cutting surface to breach the skin of a tube or the like to which it is fitted. The skin of a tube or the like has a higher level of hardness than it's core material resulting from its manufacture. By the cutting surface being able to breach the skin of a tube or the like to reach the softer core material, a superior seal and resistance to axial removal of the tube or like is obtained.
Any number or size of interior annular protuberances may be provided depending upon requirements. If more interior annular protuberances are provided, a more robust seal is achieved.
The collar may be arranged to apply a circumferential compressive force to deform the body in any suitable way, for example a so-called shaft clamp, hub clamp or hose type "jubilee" clamp may be used. However, the inner body and the collar preferably each have complimentary camming surfaces inclined to their axes which co-act to apply the circumferential compressive force to deform the body. The collar and the inner body are preferably arranged to be moved relatively towards each other so that the camming surfaces co-act. The collar and the inner body may be moved towards each other by any suitable means, such as by using an appropriate tool or by using corresponding threads on the inner body and collar such that the collar is rotated relative to the inner body to pull it over the inner body. The complimentary camming surfaces may be inclined at any desirable corresponding angles to provide a longer or shorter distance over which the inner body and collar may be moved towards each other. The complimentary camming surfaces may be provided by an external frusto-cone on the inner body and a corresponding frusto-conical inner surface within the collar. One or both of the camming surfaces could be provided with a friction reducing coating or plating to reduce the forces required during use.
Once the collar and inner body are moved towards each other sufficiently, a holding 20 means keeps them in the desired relative positions. The holding means may be an :. interference fit.
According to a second aspect of the present invention there is provided a method of attaching a coupling to an end of a tube, pipe, conduit or other round solid or hollow section, * the method comprising providing a tube or the like into a bore passing through at least a portion of an inner body, the bore having one or more interior annular protuberances extending into the bore; and providing a collar around the inner body and using the collar to apply a circumferential compressive force thereto so that the body is deformed bringing the one or more annular protuberances into engagement with the tube or the like.
Embodiments of the present invention will now be described by way of example only, with reference to the accompanying drawings in which: Figure 1 shows an inner member partially in cross-section; Figure 2 shows an enlarged view of a portion of the inner member; Figure 3 shows a collar partially in cross-section; Figure 4 shows another collar partially in cross-section; Figure 5 shows a perspective view of another collar; Figure 6 shows a cross-section of another collar; Figure 7 shows a perspective view of a collar and an inner member pre-assembled onto a tube or the like; Figure 8 shows a cross-sectional view of a collar being moved axially relative to an inner member; Figure 9 shows a perspective view of a collar on an inner member after activation; Figures 10 to 12 show the various stages of a collar being moved axially relative to an inner member; Figure 13 shows an alternative view of a collar fitted over an inner member; Figure 14 shows cross-sectional view of a further embodiment of a collar and inner member; Figure 15 shows a perspective view of the embodiment shown in Figure 14 and Figure 16 shows a further cross-sectional view of a collar and inner member.
The following examples discuss the invention being used in conjunction with traditional tube. However the invention can also be used with pipe, solid rod, wire rod or any other round section.
Embodiments of the invention include a method of attaching a coupling and a * io coupling that can for example, be machined into a traditional coupling, as will be shown in **.* . . . . * * the following example, or machined onto existing equipment such as, but not limited to, valves, manifolds, pumps, hoses etc. The coupling comprises an inner body or a sealing member as shown for example in Figures 1 and 2 and a separate section or collar as shown for : example in Figure 3, which is used to modify the form of the sealing member.
The sealing member seals against a tube and also retains the tube in position. This member will be referred to as the claw end in the following description and is shown in Figs 1 and 2.
In this example the claw end A has an outside surface with an external frusto-cone 1 which is inclined to the axis of the claw end, in this example by around 20°, and which has a semi circular groove 2 at the large end of the frusto-cone. Other groove cross-sections have been proven to give the same result such as a square form which may have radii in each corner. A large shoulder 3 is provided, which is used as a positive stop that will be discussed later. There is also a portion between the semi-circular groove 2 arid the large shoulder 3 that contains a number of small grooves 4. These grooves 4 are to give an interference fit which will be discussed later. These grooves 4 can also be replaced by other means to provide an interference fit such as a plain portion or a slightly tapered portion. Other combinations of angles, grooves and serrations have also be proven to give adequate functionality.
Internally within the claw end A there are a number of interior annular protuberances or teeth 5 that can be generated with either sharp points, small radii of around 0.2mm or small flat lands of around 0.2mm width. It should be noted that in this example four teeth are shown but any number of teeth can be utilised depending upon performance requirements.
Inwardly from the open end of the claw end, beyond the teeth 5, this example shows a plain cylindrical portion that is concluded by an internal shoulder 6. This shoulder 6 then leads into a smaller internal bore 7. It should be noted that the invention does not require the internal shoulder 6 resulting in the bore 7 being of similar diameter to that of the teeth 5. The internal shoulder 6 is utilised only as a guide for tube / pipe insertion depth and can be achieved by using other methods such as a marking on an inserted tube to indicate minimum / maximum tube insertion The second member is the component which provides the profile, which will be compressed onto the first member, the claw end A. This second member will be referred to as the collar B and examples of it are shown in Figs 3, 4, 5 and 6.
In this example the internal profile of the collar includes a plain cylindrical portion 8, :::: which is designed to give an interference fit with the grooved section 4 of the claw end. This * !0 plain cylindrical portion 8 could be replaced by a slightly tapered portion or a grooved portion * : (similar to that of the grooved portion on the claw end 4) that would also generate an interference fit. Other profiles have also been used such as a small lip and / or an additional spring clip. The form then changes to an internal taper 9, in this example of around 20° *.: inclusive. However, any taper could be provided for example between 5° and 80° or between : 2f 10° and 30°. This internal frusto-conical profile 9 is then transferred into a small step 10 that contains a large radius at the interchange between the cone 9 and the step 10. There is also a plain cylindrical bore 11 through the remainder of the collar through which a tube / pipe will pass through. Other combinations of angles, grooves and serrations have also be proven to give adequate functionality.
The external profile 12 of the collar, unlike most existing tube fittings can be manufactured from any available material section e.g. round, hexagonal, square cross-section.
The only requirement of this external profile is that adequate wall thickness 13 between the internal cone 9 and the external profile 12 is provided, so that swelling of the external profile 12 is restricted. This restriction ensures that the deformation generated by the two engaging frusto-cones 1 & 9 is produced internally onto the tube and not externally onto the collar external profile 12.
The last profile of the external form of the collar B is by means of a number of solid face(s) 14 which are perpendicular to the axis of the internal profile. This profile will be utilised to force the collar B onto the claw end A. It should be noted that although in the example of Figure 3 the profile 14 is provided at the same end of the collar as the plain bore 11, this profile 14 which is utilised to force the collar onto the claw end could be provided by means of an undercut 15 in the external profile 12 of the collar as shown in Figure 4 or an additional shoulder 16 as shown in Figure 5.
It is important to note that although in Figs 3 and 4 the internal frusto-cone 9 is shown as one continuous angle, it would also be possible to utilize two or more angles 17 as shown in Fig 6 to change the rate of deformation at any given point during compression.
It should also be noted that in both components a frusto-cone inclined to the component axes by around 20° has been described. However, other angles would be acceptable for use. By lessening the angle the amount of compression generated per unit of collar movement would be reduced, as would the force required to generate this movement. A larger angle would have the opposite effect. The inclination can be selected appropriately for envisaged uses of particular connectors.
The pre-assembled components are shown in a perspective view in Figure 7 and in * 20 cross-section in Figure 8 In use a piece of tube 18 is inserted through the plain bore 11 of the collar 19. The tube is then inserted through the internal profile of the claw end 20 ensuring that the tube travels past the last tooth 5 and into the plain cylindrical portion and abutment face 6. In this example the tube is inserted to a dead stop, however this feature is not a * necessity and can be omitted if required, providing an alternative method of ensuring that the 4 tube is inserted to the correct distance is provided.
Once the tube 18 is in place, the collar 19 is forced onto the claw end 20. In this example this force is generated by an external method such as a hydraulic ram, a pneumatic ram or an electrical linear slide, such that the two components are simply' pushed together.
However, the collar 19 can be forced onto the claw end 20 by any suitable method.
As the collar 19 is forced over the external frusto-cone 1 of the claw end 20, the external frusto-cone I engages with the internal frusto-cone 9 or cones 17 of the collar. In this example the solid face 14 would be used to apply the linear force until the opposite end of the collar makes contact 21 with the shoulder 3 of the claw end as shown in Figure 9.
Internally during compression, the form of the end of the claw end alters as shown in Figures 10 to 12. The components are supplied with the collar fitted to the end of the claw end and retained by means of an interference fit. In Figure 10 the tube is shown fully inserted.
During compression the internal tapered portion 9 & 17 of the collar engages with the external frusto-cone of the claw end 1. Providing that the thickness of the collar 13 is adequate to resist the hoop strength of the claw ends section 23, the form of the claw end will begin to compress inwards. This compression will pivot about the semi-circular undercut 2.
Tube grip occurs at this point when the claw end's teeth 5 make contact 25 with the tube 18 as shown in Figure 11. Ideally all teeth will make contact at the same point during actuation, however this is not essential.
The teeth 5 will primarily cut into the outer skin of the tubing 18 until a point where the forces required to cut into the skin become larger than the forces required to deform the tube. At this point the tube 18 will begin to deform 27. As shown in Figure 12, this will result in the tube swelling in some areas and in some areas contracting. This deformation combined with the initial tube bite produces two outcomes that are particularly advantageous when considering a tube! pipe fitting. Firstly a high quality seal is achieved between the tube 18 and the internal form! teeth 5 of the claw end. These seal points 28 are shown in Figure 13.
Please note the seal points shown in this example are dependent upon the number of teeth and :::.: their position and can be varied as required.
*2o When fully compressed as shown in Figure 12, the tube 18 is also deformed 27 * : resulting in a form that cannot be removed from the claw end. This tube bite / compression is shown in Figure 13. The outer skin of the tubing is broken 28 by each tooth 5. This results in an enhanced seal due to the fact that the skin of tube / pipe has a higher level of hardness than the core material due to cold forming processes used in its manufacture.
*. �=4 Embodiments of this invention address the issues currently encountered with the existing design as follows: * Embodiments of the invention can be manufactured from standard commercial material and require no enhancements. However, enhancements can be offered to meet the future demands of our ever changing industry needs. As an example, higher pressures / temperatures may require enhanced properties within the material or the material may require additional processing.
* No treatment processes are required within the components of this design which reduces the corrosion resistance of the surfaces. However, enhancements can be offered to meet the future demands of our ever changing industry needs. As an example, higher pressures / temperatures may require enhanced properties within the material or the material may require additional processing.
* Embodiments of the invention are more tolerant to standard tubing and thus no special restrictions of some properties such as skin hardness need to be made.
* Embodiments of the invention are tolerant to poorly prepared tubing.
* Longitudinal scratches on the tube do not pose a problem to embodiments of the invention as the initial bite of the teeth cuts through the skin.
* The coupling can be manufactured in materials which are compatible with various standards such as NACE.
* The methods used to assemble the coupling to the tube can rely on either a thread or a mechanical tool, both of which can assemble to a dead stop or pre-determined torque.
The examples shown above utilise a body, which contains the claw end profile.
However it should be noted that embodiments of invention could accommodate the claw end body being made of two individual items, the first containing the external frusto-cone, the internal bore that contains the teeth and a sealing portion to seal between either sections of the body and the second would contain a sealing portion, to seal between either sections of the *: ::. body, and a threaded portion that a nut would connect with.
* ::::* An example of this is shown in Figure 14. In this example the sealing arrangement previously discussed as the claw end is now generated as a ferrule 29. This ferrule contains *..
: the same internal and external profile as the claw end including the teeth 5, the external frusto-cone 1 and the semi-circular groove 2. However in addition to these profiles there is also a sealing surface 30 used to generate a seal between the ferrule and the secondary body 31. The secondary body 31 contains a mating sealing surface 30. It also contains a plain bore that serves the same purpose as the plain bore of the claw end 7. Externally the secondary body 31 contains a male thread 32 that is used to screw the collar, in this example in the form of a nut 33, onto the secondary body 31. It is this thread 32, which generates the force required to deform the ferrule 29 in the same way as the claw end was deformed in the
previous example.
It should be noted that in this example both the body 31 and the nut 33 contain means by which a rotational force can be transferred to the thread. Figure 15 shows a hexagonal form 34 on both components. However, this is not essential as any form capable of being rotated will be acceptable such as a square form or two or more flats on a diameter.
Additionally the threads on the secondary body and nut could be inverted such that the secondary body contains the female thread and the nut contains the male thread. The ferrule 29 would then sit within a part of the body. This version would be particularly suited for use within existing equipment such as valves and manifolds. Both of the ferrule designs mentioned above could be used as tennination style product, i.e. they would be utilised at points within a tubing / piping system where the connection needs to be disconnected.
Many variations may be made to the examples of the invention discussed above without departing from the scope of the invention. For example by increasing or decreasing the number of teeth within the claw end / ferrule, the sealing and tube retention properties would alter accordingly. It should also be noted that in some applications users may require the addition of a soft' seal, which would be placed in the recess 35 shown in Figure 16 created between the claw end / ferrule and the tube. This recess will reduce in volume during compression of the collar I nut and thus result in compression of the soft' seal.
All of the above described components could be manufactured from any material including metallic and non-metallic materials. In addition to this by increasing the mechanical properties such as hardness of the teeth 5 the tube bite would be dramatically enhanced. The coupling described above can be used with a tube or the like made from any material.
However, a tube or the like made from metal is preferred. Such methods as already used in the twin ferrule industry could be used to generate these enhanced mechanical properties.
* 0 The following major differences between embodiments of the present invention and
the prior art should be observed.
Unlike the circumferential compressive force applied to deform the inner body such -. : that the one or more annular protuberances engage a tube or the like in embodiments of the present invention, conventional twin ferrule fittings use a knurled effect within the body to *: !5 grip the tube. This knurled section does not produce a seal or bite / cut into the outer skin of the tube. The seal with this style of fitting is achieved by the internal profile of the body nose and the tube profile being forced together to produce a compressed I moulded form which produces a seal but does not bite into the tube.
It should also be noted that these conventional couplings are rated to far lower pressure ratings than embodiments of the invention described herein, and are limited to what tube wall thickness can be used.

Claims (22)

  1. CLAIMSI. A coupling for attaching to an end of a tube, pipe, conduit or other round solid or hollow section, the coupling comprising: an inner body with: an interior bore passing through at least a portion of the inner body to receive a tube or the like, the bore surface having one or more annular protuberances extending into the bore; an external inclined surface; a collar to be received on the inner body to apply a circumferential compressive force to deform the inner body, the collar having an inclined surface for co-acting engagement with the inclined surface on the exterior of the inner body, such that, in use, the collar and inner body are movable by being forced in an axial direction, from a relatively less engaged position to a relatively more engaged position causing the inclined surfaces to co-act such that the collar applies a circumferential compressive force to displace the bore surface of the inner body inwardly, with a result that the annular protuberances * * , -will engage with the outer wall of the tube or the like. a...
    2J
  2. 2. A coupling according to claim 1, wherein the collar and inner body are movable by being forced translationally axially and without screw threaded motion, from the relatively less engaged position to the relatively more engaged position. a. a * *1
    *
  3. 3. A coupling according to claim 1 or claim 2, wherein the coupling is provided as a coupled item, the collar received and retained on the inner body such that de-coupling is inhibited.
  4. 4. A coupling according to claim 3, wherein collar is received and retained on the inner body in the relatively less engaged position in readiness for movement to the relatively more engaged position.
  5. 5. A coupling according to claim 3 or claim 4, wherein the collar and inner body are provided with engagement formations for securing one another in both the less engaged position and the more engaged position.
  6. 6. A coupling according to any preceding claim, wherein the inclined surface on the exterior of the inner body extends to adjacent the leading end of the interior bore of the inner body.
  7. 7. A coupling according to any preceding claim, wherein the leading end of the bore of the inner body is shielded by the collar.
  8. 8. A coupling according to any preceding claim, wherein the annular protuberarices provide the only seal between the collar and the tube.
  9. 9. A coupling according to any preceding claim, wherein the inner body has a frusto-conical or cylindrical external portion with at least a portion of the bore and one or more of the interior annular protuberances therein, such that, in use the collar is provided around the frusto-conical or cylindrical external portion to apply a : .. circumferential compressive force to it. *I. -
    .. :
  10. 10. A coupling according to any preceding claim, wherein the interior annular protuberances have a cutting surface to breach the skin of a tube or the like to which it is fitted. S. S * -S * S.
    * "25
  11. 11. A coupling according to any preceding claim, wherein the bore of the inner body has two or more interior annular protuberances.
  12. 12. A coupling according to any preceding claim, wherein the inner body and collar each have engagement means to be engaged by a tool to move the inner body and collar translationally relatively towards each other for the complimentary co-acting inclined surfaces to co-act.
  13. 13. A coupling according to claim 12, wherein the engagement means comprise engagement surfaces to receive an axial coupling force applied in an axial direction to move the inner body and collar with respect to one another from the relatively less engaged position to the relatively more engaged position.
  14. 14. A coupling according to any preceding claim, wherein the complimentary co-acting inclined surfaces are provided by an external frusto-cone on the inner body and a corresponding frusto-conical inner surface within the collar.
  15. 15. A coupling according to any preceding claim, wherein one or both of the co-acting inclined surfaces is provided with a friction reducing coating.
  16. 16. A coupling according to any preceding claim, wherein one or both of the co-acting inclined surfaces is plated.
  17. 17. A coupling according to any preceding claim, provided with a holding means to maintain the inner body and collar in engagement with each other after the complimentary inclined camming surfaces have co-acted and the collar and inner body :::: are in a completely engaged position..
    ::: .
  18. 18. A coupling according to claim 17, wherein the holding means is an interference fit.
  19. 19. A method of attaching a coupling according to any preceding claim to an end of a :: : tube, pipe, conduit or other round solid or hollow section, the method comprising; introducing a tube or the like extending into the bore passing through the inner body; forcing the collar axially with respect to the inner body to apply a circumferential compressive force to the inner body acting as the co-acting inclined surfaces engage one another, such that the inner body is deformed radially inwardly, causing the annular protuberances to engage with the outer wall of the tube or the like, so as to seal with the wall of the tube.
  20. 20. A method according to claim 19, wherein the collar and inner body are moved relatively to each other using a tool.
  21. 21. A coupling substantially as hereinbefore described with reference to the accompanying drawings.
  22. 22. A method substantially as hereinbefore described with reference to the accompanying drawings. *..I * S * ** * *** I * S I... S... * S S *. S *. S * . S * .. ** S * SS * **Amendments to the claims have been filed as followsCLAIMS1. A coupling for attaching to an end of a tube, pipe, conduit or other round solid or hollow section, the coupling comprising: an inner body with: an interior bore passing through at least a portion of the inner body to receive a tube or the like, the bore surface having one or more annular protuberances extending into the bore; and an external inclined surface; a collar configured to be received on the inner body to apply a circumferential compressive force to deform the inner body, the collar having an inclined surface for co-acting engagement with the inclined surface on the exterior of the inner body, such that, in use, when a tube or the like is received in the bore of the body, and the collar is moved axially along the inner body, the collar applies a circumferential compressive force to the inner body to cause the inner body to deform such that the plurality of annular protuberances engage the tube or the like to seal with it, wherein the coupling is a pre-assembled component in which the collar is fitted to and retained on the inner body prior to use. *..#2. A coupling according to claim 1 wherein the coupling is retained on the inner body by * : means of an interference fit. **.*3. A coupling according to claim 2 wherein the inner body is provided with a grooved **.surface configured to provide the interference fit with the cylindrical section to retain : 25 the collar on the inner body.S..... * S4. A coupling according to any preceding claim, wherein the inclined surface on the exterior of the inner body extends axially as far as the leading end of the interior bore of the inner body.5. A coupling according to any preceding claim, wherein the leading end of the bore of the inner body is shielded by the collar.6. A coupling according to any preceding claim, wherein the annular protuberances are the only sealing means for sealing with the tube provided by the coupling.7. A coupling according to any preceding claim, wherein the inner body has a frusto-conical or cylindrical external portion with at least a portion of the bore and one or more of the interior annular protuberances therein, such that, in use the collar is provided around the frusto-conical or cylindrical external portion to apply a circumferential compressive force to it.8. A coupling according to any preceding claim, wherein the interior annular protuberances have a cutting surface to breach the skin of a tube or the like to which it is fitted.9. A coupling according to any preceding claim, wherein the bore of the inner body has two or more interior annular protuberances.10. A coupling according to any preceding claim, wherein the inner body and collar each have engagement means to be engaged by a tool to move the inner body and collar translationally relatively towards each other for the complimentary co-acting inclined surfaces to co-act.*.....* 11. A coupling according to claim 10, wherein the engagement means comprise 1: engagement surfaces to receive an axial coupling force applied in an axial direction to *:. 25 axially move the inner body and collar with respect to one. S. .5: . 12. A coupling according to any preceding claim, wherein the complimentary co-acting S.. S*.* inclined surfaces are provided by an external frusto-cone on the inner body and a corresponding frusto-conical inner surface within the collar.13. A coupling according to any preceding claim, wherein one or both of the co-acting inclined surfaces is provided with a friction reducing coating.14. A coupling according to any preceding claim, wherein one or both of the co-acting inclined surfaces is plated.15. A coupling according to any preceding claim, provided with a holding means to maintain the inner body and collar in engagement with each other after the complimentary inclined camming surfaces have co-acted and the collar and inner body are in a completely engaged position.16. A coupling according to claim 15, wherein the holding means is an interference fit.17. A method of attaching a coupling according to any preceding claim to an end of a tube, pipe, conduit or other round solid or hollow section, the method comprising; introducing a tube or the like extending into the bore passing through the inner body; forcing the collar axially with respect to the inner body to apply a circumferential compressive force to the inner body acting as the co-acting inclined surfaces engage one another, such that the inner body is deformed radially inwardly, causing the annular protuberances to engage with the outer wall of the tube or the like, so as to seal with the wall of the tube.18. A method according to claim 19, wherein the collar and inner body are moved * ***** * relatively to each other using a tool. ** ê* ****S .5S . 5. * S *S 5....S
GB0916438A 2005-02-25 2005-07-22 A coupling Active GB2466098B (en)

Applications Claiming Priority (2)

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GBGB0503954.0A GB0503954D0 (en) 2005-02-25 2005-02-25 Connector and method of connecting tubes, pipes and round sections
GB0515165A GB2423561B (en) 2005-02-25 2005-07-22 A coupling

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GB0916438D0 GB0916438D0 (en) 2009-10-28
GB2466098A true GB2466098A (en) 2010-06-16
GB2466098B GB2466098B (en) 2010-12-15

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Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090302603A1 (en) * 2005-11-18 2009-12-10 Russell Clayton Gas supply coupling for a water heater
US20080213709A1 (en) * 2005-11-18 2008-09-04 Russell Clayton Gas supply coupling for a water heater
US20100224543A1 (en) * 2009-03-05 2010-09-09 Ellis Scott J Connection assembly for ultra high pressure liquid chromatography
US9151734B2 (en) * 2009-03-05 2015-10-06 Idex Health & Science Llc Connection assembly for ultra high pressure liquid chromatography
US20100327579A1 (en) * 2009-06-25 2010-12-30 John Mezzalingua Associates, Inc. Fluid fitting
US20110049874A1 (en) * 2009-08-26 2011-03-03 Charlotte Pipe And Foundry Company Polymeric pipe fitting and gasket assembly and sealed polymeric pipe apparatus formed therewith
US20120001425A1 (en) * 2010-07-02 2012-01-05 Frank Ching King Lee Fluid Line Connecting Fitting
US20130014836A1 (en) * 2011-07-14 2013-01-17 John Cain Pump adaptor
CN102359674B (en) * 2011-08-23 2014-04-30 金颐实业有限公司 Pipeline connecting device
NO334696B1 (en) 2011-09-15 2014-05-12 Roxar Flow Measurement As Well hole measurement arrangement
JP6247887B2 (en) * 2013-10-08 2017-12-13 因幡電機産業株式会社 Pipe fitting
DE102014003849A1 (en) * 2014-03-19 2015-09-24 Eugen Riexinger Gmbh & Co. Kg Coupling for producing a press connection between two pipes
AU2015255789A1 (en) * 2014-05-09 2016-12-22 Swagelok Company Conduit fitting with components adapted for facilitating assembly
US9768599B2 (en) * 2014-07-17 2017-09-19 Honeywell International Inc. Separable wallbox device and memory
EP2995842B1 (en) * 2014-09-11 2018-07-11 Hamilton Sundstrand Corporation Weldless transfer tube assembly
DE102015102404A1 (en) * 2015-02-20 2016-08-25 Viega Gmbh & Co. Kg Fitting with coating, piping system and use of the fitting or piping system
US9982813B2 (en) 2015-03-27 2018-05-29 Designed Metal Connections, Inc. Swage fitting
KR101628251B1 (en) * 2015-03-31 2016-06-09 계양전기 주식회사 Bit changing device of electric tool
KR101682703B1 (en) * 2016-04-14 2016-12-05 (주)하나테크 Lock Sleeve
CN106015778A (en) * 2016-07-22 2016-10-12 陆子万 Pipe clamping connection device
EP3992514A4 (en) * 2019-06-28 2023-08-23 Higashio Mech Co., Ltd. Pipe joint
JP7185877B2 (en) * 2019-07-01 2022-12-08 東尾メック株式会社 pipe joint
JP7126213B2 (en) * 2020-05-29 2022-08-26 東尾メック株式会社 pipe joint
CN111237572A (en) * 2020-01-22 2020-06-05 临海伟星新型建材有限公司 Detachable connecting plastic pipe fitting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541141A (en) * 1949-03-01 1951-02-13 George V Woodling Threaded contractible ring sleeve
US3640551A (en) * 1970-10-01 1972-02-08 Exxon Research Engineering Co Coupling for plastic pipe
EP0521064A1 (en) * 1990-03-22 1993-01-07 Lokring Corporation Pipe fitting with improved coupling body
US5181752A (en) * 1990-06-26 1993-01-26 Lokring Corporation Pipe fitting with swage ring locking mechanism
EP1851474A1 (en) * 2005-02-24 2007-11-07 Lokring Technology, LLC Improved fitting with sequential sealing acti

Family Cites Families (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969142A (en) * 1931-02-06 1934-08-07 Patrick J Mcintyre Tube coupling
GB379051A (en) 1931-03-14 1932-08-25 Stanley James Robert Stewart Improvements in means for preventing loss from tanks containing readily vaporizable liquids
GB427306A (en) 1932-07-19 1935-04-23 Gen Electric Improvements in and relating to means for measuring the instantaneous value of an alternating current quantity
US2139413A (en) * 1932-11-26 1938-12-06 Patex Sa Joint for pipes
US2246557A (en) * 1939-02-18 1941-06-24 Louis G Walters Bus connector
US2613959A (en) * 1948-12-03 1952-10-14 Brockway Company Coupling for threadless pipes
GB667476A (en) 1950-02-28 1952-03-05 Robert Alison Kerman Protective cover structure for use in conjunction with a mantle stand
GB867597A (en) 1958-07-19 1961-05-10 Anaesthetic Equipment Ltd Improvements in apparatus for mixing gases
US3149860A (en) * 1961-01-16 1964-09-22 Boeing Co High pressure, high temperature reconnectible tube fitting
US3103373A (en) 1961-06-29 1963-09-10 Crawford Fitting Co Controlled phase sequential gripping device
US3290069A (en) * 1964-09-03 1966-12-06 Imp Eastman Corp Tube fitting
US3466068A (en) * 1965-05-26 1969-09-09 Inventex Gmbh Sealing ring with circular cutting edges for pipe connection
US3375026A (en) * 1965-10-21 1968-03-26 Crawford Fitting Co Tube coupling
US3471181A (en) * 1966-10-13 1969-10-07 Imp Eastman Corp Fitting
DE1600466B2 (en) * 1967-04-15 1976-10-28 Gressel Ag, Aadorf, Thurgau (Schweiz) FITTED PIPE FOR PLASTIC PIPES
US3498648A (en) * 1968-08-22 1970-03-03 Boeing Co High temperature and pressure tube fitting
US3627727A (en) 1968-12-18 1971-12-14 Eastman Kodak Co Substituted dicarboxylic acid dihydrazides and pololefin compositions containing them
US3827727A (en) * 1969-11-14 1974-08-06 K Moebius Constrictor ring and tube joint
US3707302A (en) * 1970-08-27 1972-12-26 Ite Imperial Corp High performance fitting
BE792460A (en) * 1971-12-11 1973-03-30 Armaturenfabrik Hermann Fa THREADED FITTING FOR PIPE
US4026006A (en) * 1972-06-26 1977-05-31 Moebius Kurt Otto Method of forming a tube joint
US3893720A (en) * 1973-02-09 1975-07-08 Moebius Kurt Otto Constrictor ring joint
GB1473389A (en) * 1973-05-09 1977-05-11 Dexploitation Des Brevets Ocla Pipe couplings
JPS5647437B2 (en) * 1974-08-26 1981-11-10
US3994517A (en) * 1975-10-01 1976-11-30 W-K-M Wellhead Systems, Inc. Pipe anchor for wellhead assemblies
US4257135A (en) * 1977-12-01 1981-03-24 Hackforth Gmbh & Co. Kg Assembly tool for tube fittings
US4134700A (en) * 1978-02-10 1979-01-16 Deere & Company Zero clearance spline coupling
US4189817A (en) * 1978-03-03 1980-02-26 Moebius Kurt Otto Hydraulic assembly tool for tube fittings
US4482174A (en) * 1980-09-15 1984-11-13 Lokring Apparatus and method for making a tube connection
DE3129204A1 (en) * 1981-07-24 1983-02-10 Hackforth GmbH & Co KG, 4690 Herne "ASSEMBLY DEVICE FOR TENSIONING PIPE CONNECTIONS"
US4647086A (en) * 1983-12-27 1987-03-03 Brass-Craft Manufacturing Company Tube coupling
US4647066A (en) 1985-09-09 1987-03-03 Walton Edward J Orthopedic chair
US4705302A (en) * 1986-05-28 1987-11-10 Teledyne Linair Engineering Tube fitting
US4867489A (en) * 1987-09-21 1989-09-19 Parker Hannifin Corporation Tube fitting
US4858968A (en) * 1988-03-17 1989-08-22 Peter Moebius Lockring tube joint
US5088771A (en) * 1990-02-06 1992-02-18 Sierracin Corporation Tube union
US5114191A (en) * 1990-03-22 1992-05-19 Lokring Corporation Pipe fitting with coupling body and improved isolation tooth arrangement
EP0523123B1 (en) * 1990-04-06 1998-02-25 Lokring Corporation Hydraulic assembly tool with improved load bearing arrangement for tube fittings
NZ238986A (en) 1990-07-27 1997-01-29 Taylor Kerr Couplings Ltd Fliud-tight pipe coupling with slots in sealing sleeve that receive teeth of gripping ring
DE4038539C1 (en) * 1990-12-03 1992-04-30 Parker-Ermeto Gmbh, 4800 Bielefeld, De
DE4116610C2 (en) 1991-05-22 1996-08-01 Parker Hannifin Gmbh Geschaeft System and method for connecting pipelines
US5452921A (en) * 1991-10-31 1995-09-26 The Deutsch Company Axially swaged fitting
GB2265680A (en) 1992-04-03 1993-10-06 Yang Ming Tung Quick pipe coupling
JPH0835588A (en) 1994-05-16 1996-02-06 Hitachi Metals Ltd Biting-in type pipe coupling
US5709416A (en) 1994-08-05 1998-01-20 Wood; Roy Threaded coupling-tool joint
US5709418A (en) * 1995-03-20 1998-01-20 Lokring Corporation Pipe fitting with coupling body and swage ring with kickdown device to prevent reduction in sealing tooth contact force
DE19709464C2 (en) 1997-03-07 2000-03-09 Voss Armaturen Pipe fitting with cutting ring for metallic pipes
US5882050A (en) * 1997-04-15 1999-03-16 Williams; Peter C. Ferrule with relief to reduce galling
US5947532A (en) * 1997-12-09 1999-09-07 Perfection Corporation Stab-type coupling for conduit
DE19856523C1 (en) 1998-12-08 2000-03-09 Selck Gmbh & Co Kg Pipe coupling device e.g. for pressure medium pipes, has pressure cuffs at opposite ends of rotationally symmetrical body with teeth engaging inserted pipe end
US6131964A (en) * 1998-12-15 2000-10-17 Westinghouse Air Brake Company SAS fitting for tube and pipe connections
US6467752B2 (en) * 1999-07-23 2002-10-22 Westinghouse Air Brake Technologies Corporation Unitary fitting and ball-valve
FR2797674B1 (en) 1999-08-17 2001-09-28 Legris Sa DEVICE FOR CONNECTING A RIGID PIPE SECTION TO AN ORGAN
US6378913B1 (en) * 1999-11-01 2002-04-30 Dana Corporation Swivel coupling and method for attaching a swivel nut to a tail piece
DE10016312A1 (en) * 1999-12-02 2001-10-04 Selck Gmbh & Co Kg Device for producing a pipe coupling
WO2001042700A2 (en) 2000-12-07 2001-06-14 Quarterlock, Inc. Tube coupling device
US6434809B1 (en) 2000-04-18 2002-08-20 Cummins Engine Company, Inc. Tooling component for camshaft removal and installation
DE10021306C2 (en) 2000-04-27 2002-02-28 Mapress Gmbh & Co Kg pipe coupling
US6364371B1 (en) * 2000-05-26 2002-04-02 Westinghouse Air Brake Technologies Corporation Conical flange interface for railway applications
US6618919B1 (en) * 2000-10-03 2003-09-16 Mckay Albert A. Remote actuation of installation tooling pump
US6692040B1 (en) * 2000-10-03 2004-02-17 Lokring Technology Corporation Lokring fitting having improved anti-torsion capability
US6434808B1 (en) * 2000-11-02 2002-08-20 Westinghouse Air Brake Technologies Corporation Compact installation tool
DE10105013C1 (en) 2001-01-26 2002-07-11 Mapress Gmbh & Co Kg Pipe coupling has coupling bodies at opposite ends of intermediate sleeve provided with two sets of radial teeth for biting into pipe end and coupling sleeve upon radial compression
US7066496B2 (en) 2001-02-06 2006-06-27 Swagelok Company Fitting with separable gripping device for pipe and tube
US7416225B2 (en) 2001-02-06 2008-08-26 Swagelok Company Fitting for metal pipe and tubing
FR2828809B1 (en) 2001-08-27 2003-11-28 Oreal FILTERING COMPOSITION CONTAINING AT LEAST ONE DIBENZOYLMETHANE DERIVATIVE AND 1,1,1, -TRI- (2-METHYL-4-HYDROXY-5-TERT-BUTYLPHENYL) -BUTANE
DE10146347A1 (en) 2001-09-20 2003-04-30 1 Mal 1 Software Gmbh Method for transmitting a data stream from one producer to a plurality of viewers
DK1700059T3 (en) * 2004-01-02 2011-08-29 Manfred Reckzeh compression pipe joint
CA2556907C (en) * 2004-02-24 2013-10-29 Lokring Technology Corporation Hydraulic hand tool
US7503595B2 (en) * 2004-04-22 2009-03-17 Lokring Technology, Llc Fitting having low volume crevice
CA2580289C (en) * 2004-09-17 2013-07-09 Lokring Technology Corporation Installation tool assembly
GB0427306D0 (en) 2004-12-14 2005-01-19 Euro Celtique Sa Device for measuring pain
US20060284415A1 (en) * 2005-03-16 2006-12-21 Mckay Albert A Medical gas and vacuum system
US7707032B2 (en) 2005-10-20 2010-04-27 National Cheng Kung University Method and system for matching speech data
US8888140B2 (en) * 2009-02-18 2014-11-18 Parker-Hannifin Corporation Hose fitting
US8550504B2 (en) * 2011-02-16 2013-10-08 Designed Metal Connections, Inc. Fluid fitting for soft tubing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541141A (en) * 1949-03-01 1951-02-13 George V Woodling Threaded contractible ring sleeve
US3640551A (en) * 1970-10-01 1972-02-08 Exxon Research Engineering Co Coupling for plastic pipe
EP0521064A1 (en) * 1990-03-22 1993-01-07 Lokring Corporation Pipe fitting with improved coupling body
US5181752A (en) * 1990-06-26 1993-01-26 Lokring Corporation Pipe fitting with swage ring locking mechanism
EP1851474A1 (en) * 2005-02-24 2007-11-07 Lokring Technology, LLC Improved fitting with sequential sealing acti

Also Published As

Publication number Publication date
GB2462016B (en) 2010-06-30
NO344872B1 (en) 2020-06-08
US20150091298A1 (en) 2015-04-02
GB0916429D0 (en) 2009-10-28
GB2466098B (en) 2010-12-15
NO20074821L (en) 2007-09-21
WO2006090123A1 (en) 2006-08-31
EP1851475B1 (en) 2014-01-01
US20110095529A1 (en) 2011-04-28
US20130025731A1 (en) 2013-01-31
EP1851475A1 (en) 2007-11-07
GB2462016A (en) 2010-01-27
US20080001404A1 (en) 2008-01-03
GB0916438D0 (en) 2009-10-28
US9851034B2 (en) 2017-12-26

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