GB2413605A - connector device - Google Patents
connector device Download PDFInfo
- Publication number
- GB2413605A GB2413605A GB0409883A GB0409883A GB2413605A GB 2413605 A GB2413605 A GB 2413605A GB 0409883 A GB0409883 A GB 0409883A GB 0409883 A GB0409883 A GB 0409883A GB 2413605 A GB2413605 A GB 2413605A
- Authority
- GB
- United Kingdom
- Prior art keywords
- connector device
- opening
- screw
- protective layer
- liquid based
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000011241 protective layer Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000011236 particulate material Substances 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 6
- 238000005246 galvanizing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002923 metal particle Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/06—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means comprising radial locking means
- F16L25/08—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means comprising radial locking means in the form of screws, nails or the like
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/04—Clamping or clipping connections
- F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
- F16B7/0426—Clamping or clipping connections for rods or tubes being coaxial for rods or for tubes without using the innerside thereof
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
-
- 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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/185—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for joints with sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
A connector device (12) suitable for forming a structural inter-connection between an end of elongate member and a second member comprises a tubular body (15) open at at least one end (17) and having an opening (18) in the wall of the tubular body, at least the radially outer surface of the radially inner and outer surfaces of the body (15) having a galvanised surface finish and the opening (18) comprising a screw-thread formation which is bereft of said galvanised surface finish but is provided with a liquid based protective layer. Preferably the liquid based protective layer contains particulate material. In the method of forming a connector device assembly the liquid based protective layer preferably is applied to the surface of the screw-threaded opening (18) prior to a screw-threaded fastener (20) being inserted into the screw-threaded opening.
Description
241 3605
CONNECTOR DEVICE
The invention relates to a tubular connector device suitable for use in forming a structural interconnection between an end of an elongate member and a second member which may, for example, also be an elongate member. It relates in particular, although not exclusively, to a connector device of a kind having a protective coating and to a method of manufacture of said connector device.
A connector device of the aforedescribed type often is used to interconnect two or more metal tubes or rods that form part of a handrail or balustrade installation, or to form a structural connection to a support such as a wall or floor. Commonly the connector device is formed of cast iron which is galvanised to provide corrosion resistance when used in external environments.
For securing the connector device to the end of a tube or rod it is customary to provide a drilled and tapped opening in a cylindrical portion of the connector device. Locking means such as a grub screw is located in that opening and can be tightened to bear firmly against an outer surface of the metal tube.
This is a long established assembly technique which works efficiently.
In more severe environments corrosion can arise after a period of time at the unprotected screw thread surface of the tapped opening. This is visually undesirable and, in the event of an assembly requiring to be dismantled or modified, additional time may be incurred in separating a joint at which the screw thread is corroded. Even though the connector device may have been given a protective coating by galvanizing, typically that is removed from a localised surface area when subsequently machining to form a screw threaded opening because the alternative of pre-forming the screw-thread and subjecting it to galvanising has usually resulted in poor control over quality of the screw-thread and an unacceptably high product rejection rate.
Various proposals have been contemplated for protecting the screwthreaded opening against corrosion, but up to the time of the present invention these have not been successful, or add significantly to manufacturing or other costs.
In one of its aspects the present invention seeks to provide a connector device which has an improved resistance to the effects of corrosion. The invention seeks to provide also an improved method of manufacture of a connector device.
In one of its aspects the present invention provides a connector device comprising a tubular body portion open at at least one end and having an opening in the wall of said tubular body, at least said radially outer surface of the radially inner and outer surfaces of the tubular body portion comprising a galvanised surface finish, said opening comprising a screw-thread formation, said opening being bereft of said galvanised surface finish and said opening having had a liquid based protective layer applied thereto.
Preferably the whole of said non-galvanised surface of the opening has been provided with said liquid based protective layer.
The invention provides also a connector device assembly comprising said connector device of the invention in combination with a screw-threaded fastener such as a grub screw positioned in said opening with said liquid based protective layer being present between confronting surface regions of the opening and screw-threaded fastener.
In another of its aspects the present invention provides a method of manufacture of a connector device comprising providing a tubular body portion, subjecting at least the radially outer of the radially inner and outer surfaces of the tubular body to a galvanising treatment, subsequently forming in the wall of said tubular body a screw-threaded opening, and then applying to said screw-threaded opening a liquid based protective layer.
The invention provides also a method of forming a connector device assembly comprising said connector device and a screw-threaded fastener wherein said screw-threaded fastener is inserted into the screw-threaded opening subsequent to application of said liquid based protective layer to the opening.
The liquid based protective layer may contain particulate material, such as finely divided metal particles, to provide for example a surface appearance which blends with that of the galvanised outer surface of the connector device.
Suitable particles include zinc and aluminium particles. Preferably the particles have a maximum size of 25 micron. Maximum sizes less than 10 microns are particularly suitable.
Suitable materials for the tubular body of the connector device include cast iron and steel.
One embodiment of the present invention will now be described by way of example only, with reference to the accompanying drawings in which: Figure 1 is a perspective view of a connector device of the present invention in situ to join two tubular members, and Figure 2 is a longitudinal section of the connector device of Figure 1.
A connector device 12 for the in-line connection of two tubes 13,14 has a tubular cast iron body 15 which is provided with a small boss 16 near to each end 17 The bosses 16 each have screw-threaded passages 18 which extend through the wall of the tubular body 15 in a direction radially outwards from a major longitudinal axis 19 of the connector device.
The tubular body is formed by casting to create the integral formation of a tubular body and bosses 16 and is then subject to galvanising to protect against corrosion prior to a machining operation to form the screw-threaded passages 18.
A liquid based protective layer is then applied to the whole of the machined surfaces prior to insertion of a grub screw 20 into each screwthreaded passage 18. Said liquid based protective layer is of a kind which, in this embodiment of the invention comprises 8 microns diameter particles of zinc such that in the resulting connector device assembly of the connector device and grub screws, exposed outer regions of the screwthreaded passage 18, when the grub screw is in the fully inserted position to bear against a respective tube 13, 14, has a visual appearance corresponding substantially with that of the galvanised radially outer surface of the tubular body 15.
Claims (14)
- Claims 1. A connector device comprising a tubular body portion open at atleast one end and having an opening in the wall of said tubular body, at least said radially outer surface of the radially inner and outer surfaces of the tubular body portion comprising a galvanised surface finish, said opening comprising a screw-thread formation, said opening being bereft of said galvanised surface finish and said opening having had a liquid based protective layer applied thereto.
- 2. A connector device according to claim 1, wherein the whole of said nongalvanised surface of the opening has been provided with said liquid based protective layer.
- 3. A connector device according to claim 1 or claim 2, wherein the liquid based protective layer contains particulate material.
- 4. A connector device according to claim 3, wherein said particulate material comprises finely divided metal particles which have a maximum size or 25 micron.
- 5. A connector device according to claim 3 or claim 4, wherein said particulate material comprises particles of zinc or aluminium.
- 6. A connector device according to claim 1 and substantially as herein before described.
- 7. A connector device assembly comprising a connector device according to any one of the preceding claims in combination with a screw-threaded fastener positioned in said opening with said liquid based protective layer present between confronting surface regions of the opening and screw- threaded fastener.
- 8. Method of manufacture of a connector device comprising providing a tubular body portion, subjecting at least the radially outer of the radially inner and outer surfaces of the tubular body to a galvanising treatment, subsequently forming in the wall of said tubular body a screwthreaded opening, and then applying to said screw-threaded opening a liquid based protective layer.
- 9. Method of forming a connector device assembly comprising a connector device according to any one of claims 1 to 7 and a screw-threaded fastener, wherein said screw-threaded fastener is inserted into the screwthreaded opening subsequent to application of said liquid based protective layer to the opening.
- 10. Method according to claim 8 or claim 9, wherein said liquid based protective layer contains particulate material.
- 11. Method according to claim 10, wherein said particulate material comprises finely divided metal particles which have a maximum size of 25 micron.
- 12. Method according to claim 11, wherein said particulate material comprises finely divided metal particles which have a maximum size less than 1 0 micron.
- 1. Method according to any one of claims 10 to 12, wherein said particulate material comprises particles of zinc or aluminium.
- 14. Method according to claim 8 or claim 9, and substantially as hereinbefore described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0409883A GB2413605B (en) | 2004-04-30 | 2004-04-30 | Connector device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0409883A GB2413605B (en) | 2004-04-30 | 2004-04-30 | Connector device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0409883D0 GB0409883D0 (en) | 2004-06-09 |
| GB2413605A true GB2413605A (en) | 2005-11-02 |
| GB2413605B GB2413605B (en) | 2006-01-04 |
Family
ID=32482613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0409883A Expired - Lifetime GB2413605B (en) | 2004-04-30 | 2004-04-30 | Connector device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2413605B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2433302A (en) * | 2005-12-15 | 2007-06-20 | Redman Fisher Eng Ltd | Connector |
| WO2008092847A1 (en) * | 2007-01-30 | 2008-08-07 | Gm Global Technology Operations, Inc. | Connecting assembly |
| GB2504063A (en) * | 2012-05-22 | 2014-01-22 | Elaine Cunningham | Scaffolding coupling sleeve |
| CN104454844A (en) * | 2014-10-23 | 2015-03-25 | 中国科学院上海光学精密机械研究所 | Self-adaption adjustable connecting mechanism applicable to pipe and rod connection |
| GB2527493A (en) * | 2014-04-24 | 2015-12-30 | Design Safe Pty Ltd | A scaffolding clamp |
| CN110081054A (en) * | 2018-01-25 | 2019-08-02 | 阿特克雷钢部件股份有限公司 | Shaft coupling for electric metal pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315260A (en) * | 1970-12-28 | 1973-05-02 | Omnitechnic Gmbh | Threaded elements |
| GB2302383A (en) * | 1995-06-20 | 1997-01-15 | Kee Klamps Ltd | Tubular connector with screw-threaded inserts |
| JP2003214577A (en) * | 2002-01-18 | 2003-07-30 | Kyoshin:Kk | Coupling of cable protective corrosion resistant lining pipe |
-
2004
- 2004-04-30 GB GB0409883A patent/GB2413605B/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1315260A (en) * | 1970-12-28 | 1973-05-02 | Omnitechnic Gmbh | Threaded elements |
| GB2302383A (en) * | 1995-06-20 | 1997-01-15 | Kee Klamps Ltd | Tubular connector with screw-threaded inserts |
| JP2003214577A (en) * | 2002-01-18 | 2003-07-30 | Kyoshin:Kk | Coupling of cable protective corrosion resistant lining pipe |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2433302A (en) * | 2005-12-15 | 2007-06-20 | Redman Fisher Eng Ltd | Connector |
| GB2433302B (en) * | 2005-12-15 | 2009-01-14 | Redman Fisher Eng Ltd | Connector |
| WO2008092847A1 (en) * | 2007-01-30 | 2008-08-07 | Gm Global Technology Operations, Inc. | Connecting assembly |
| GB2504063A (en) * | 2012-05-22 | 2014-01-22 | Elaine Cunningham | Scaffolding coupling sleeve |
| GB2527493A (en) * | 2014-04-24 | 2015-12-30 | Design Safe Pty Ltd | A scaffolding clamp |
| CN104454844A (en) * | 2014-10-23 | 2015-03-25 | 中国科学院上海光学精密机械研究所 | Self-adaption adjustable connecting mechanism applicable to pipe and rod connection |
| CN110081054A (en) * | 2018-01-25 | 2019-08-02 | 阿特克雷钢部件股份有限公司 | Shaft coupling for electric metal pipe |
| US10879681B2 (en) | 2018-01-25 | 2020-12-29 | Atkore Steel Components, Inc. | Coupling for electrical metallic tubing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2413605B (en) | 2006-01-04 |
| GB0409883D0 (en) | 2004-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20240429 |