GB1559291A - Electrically insulated pipe coupling - Google Patents
Electrically insulated pipe coupling Download PDFInfo
- Publication number
- GB1559291A GB1559291A GB3121276A GB3121276A GB1559291A GB 1559291 A GB1559291 A GB 1559291A GB 3121276 A GB3121276 A GB 3121276A GB 3121276 A GB3121276 A GB 3121276A GB 1559291 A GB1559291 A GB 1559291A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- spacer
- electrically insulating
- end portion
- deformed
- 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.)
- Expired
Links
- 230000008878 coupling Effects 0.000 title claims description 35
- 238000010168 coupling process Methods 0.000 title claims description 35
- 238000005859 coupling reaction Methods 0.000 title claims description 35
- 125000006850 spacer group Chemical group 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 46
- 238000007789 sealing Methods 0.000 claims description 38
- 230000000903 blocking effect Effects 0.000 claims description 17
- 239000012777 electrically insulating material Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
-
- 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—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
- F16L25/02—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00 specially adapted for electrically insulating the two pipe ends of the joint from each other
- F16L25/03—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00 specially adapted for electrically insulating the two pipe ends of the joint from each other in non-disconnectable pipe joints
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Cable Accessories (AREA)
- Joints With Pressure Members (AREA)
Description
(54) ELECTRICALLY INSULATED PIPE COUPLING
(71) We, CAUNNED A.G., a Company organised under the Laws of Liechtenstein, of
Im Stidtle 35, Vaduz, Liechtenstein, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be described in and by the following statement:
It is known that to interrupt the electrical continuity between connected metal pipes or conduits, there are used insulating joints generally formed by a tubular metal sleeve, in which are inserted, so as to provide its perfect insulation, two tubular metal members which constitute the duct of the joint and both having a deformed end, for example a flanged end. The two adjacent deformed ends are spaced by a spacing insulating and sealing member which is compressed by the tubular metal members. The compression force may be derived, in such a manner that the insulating and sealing member, compressed between the opposite surfaces of the ends of the tubular members of the joints, must not only provide the function of an insulating spacer but must also achieve the sealing function. It should therefore be sufficiently elastic to have the characteristics of a sealing gasket.
It is evident that in this case said spacing insulating and sealing member, after undergoing severe mechanical stresses in the direction of the joint axis, tends to expand and to enter into the flow path of fluid through the joint with the result of hydraulic leakages. Furthermore, if said insulating annular spacer is formed even in a rigid unelastic material, it is extremely difficult to obtain a perfect sealing which anyway, in the long run owing to mechanical or thermal stresses, can leak.
To obviate this inconvenience it has been thought to make the joint rigid and in other cases to locate into annular grooves, formed in the opposite surfaces of the ends of the tubular metal members, O-rings so as to form a good seal between each of the said surfaces and an adjacent face of the insulating annular spacer made of a material having a high mechanical strength.
In this latter case, however, an eventual permeability to gas or an accidental break of the insulating spacer causes a leakage in the joint since the sealing given by the O-rings would be by-passed.
According to the invention, there is provided an electrically insulating pipe coupling comprising:
a first metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof:
a second metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof. said first and second pipes being coaxial and spaced with their respective deformed end portions mutually adjacent;
a tubular metal sleeve coaxial with said first and second pipes, and being positioned so as to define an annular space between the-inner surface thereof and at least the end portion of said first pipe;
a spacer formed of electrically insulating material and positioned between and in contact with the end portion of the first pipe and the end portion of the second pipe;
an elastic sealing gasket positioned in said annular space and in contact with said spacer, said inner surface of said tubular metal sleeve and the outer surface of the end portion of the first pipe; and
a blocking element in the form of a sleeve of electrically insulating material positioned in said annular space and in contact with said sealing gasket to press said sealing gasket against said spacer, said blocking element having a truncated conical portion and said tubular metal sleeve having a portion capable of being deformed into a corresponding truncated conical shape to hold said blocking member in position.
The tubular metal sleeve may either be integral or non-integral with one of the pipes. In the case where the sleeve is separate from both first and second pipes, the deformed end portion of each of the pipes may be constituted by a flange formed on the respective end portions.
Alternatively the deformed end portion of each pipe may be constituted by a bell-shaped end portion.
Preferably the coupling further comprises a second elastic sealing gasket positioned in said annular space and in contact with said inner surface of said tubular metal sleeve, the outer surface of the end portion of the second pipe and said spacer on the face thereof remote from the first elastic sealing gasket and a second blocking element in the form of a sleeve of electrically insulating material positioned in said annular space and in contact with said second sealing gasket to press said second sealing gasket against said spacer, said second blocking element having a truncated conical portion and said tubular metal sleeve having a second portion capable of being deformed into a corresponding truncated conical shape to hold said second blocking member in position.
Advantageously the spacer is an annular ring with a T-shape cross-section. Alternatively the spacer may be an annular ring with an Hshaped section having the radially inner arm of the "H" longer than the radially outer arm thereof, the spaces between the arms of the "H" being so dimensioned as to receive the bell shaped end portions of the respective pipes.
In the case where the metal sleeve is integral with one of the pipes, say the second pipe, then according to a preferred embodiment of the invention the deformed end portion of said second pipe is constituted by said tubular metal sleeve and by an annular intermediate portion connecting the said tubular metal sleeve to the remaining part of said second pipe. The spacer preferably has one face thereof, opposite to that face which is in contact with the sealing gasket, in contact with said intermediate portion of said second pipe. In this case the intermediate portion may be an annular shoulder formed on said second pipe and said spacer may be an annular ring of L-shaped section, one arm of the "L" bearing against said shoulder.
The invention will now be further described, purely by way of example, with reference to the accompanying drawings, in which:
Figure 1 shows a section through a coupling
according to the invention, in a partly as
sembled state;
Figure 2 shows a section through the coupling
of Figure 1, in the completely assembled state;
and
Figures 3 to 7, show partial sections through
respective further embodiments of couplings ac
cording to the invention.
Referring to Figures 1 and 2 there is shown a
coupling which includes first and second metal
pipes 1 and 1', provided at their adjacent ends with flanges 2, 2', extending away from the common axis of the pipes. Coaxially surrounding the end portions of the pipes 1, 1', is a tubular metal sleeve 3 having an inner diameter greater than the outer diameter of the flanges 2,2.
Positioned between the flanges 2, 2' and occupying a portion of the annular space defined between the sleeve 3 and the pipes 1,1' is an annular spacer 5 made of electrically insulating material having high mechanical strength, in particular a high resistance to compression. The spacer 5 is in the form of an annular ring of
T-shaped cross section, the vertical leg of the "T" being positioned between the flanges 2,2' while the cross-piece of the T lies between, and in contact with the radially outer surfaces of the flanges 2, 2 and the radially inner surface of the sleeve 3.
Two annular gaskets 6, 6' made of rubber, asbestite or some other known sealing material are provided on either side of the spacer 5. Each gasket 6, 6' has a radially inner diameter corre spending to the outer diameter of the pipes 1, 1 ' and an outer diameter corresponding to the outer diameter of the spacer 5. The gaskets 6, 6' are in contact respectively with the ends of the crosspiece of the T-shaped section spacer 5.
In contact with those surfaces of the gaskets 6, 6' remote from the spacer 5 are two blocking elements in the form of sleeves 4, 4' formed of an electrically insulating material and having an inner diameter corresponding to the outer diameter of the pipes 1, 1'. That portion of the sleeves 4, 4' which is remote from the gaskets 6,6' has an outer surface defined by a truncated cone while that surface of the sleeve 4, 4' which is in contact with the gaskets 6, 6' is planar.
The sleeves 4, 4' extend in an axial direction, beyond the axial limits of the sleeve 3. The result of this formation is that, as shown in
Figure 2, when the end portions 3' of the sleeve 3 are deformed radially inwards, they press against the frusto-conical portion of the sleeves 4, 4, pushing the sleeves 4, 4' towards each other.
The assembly of the joint takes place as follows. First of all the pipes 1, 1 are inserted into the tubular metal sleeve 3 with the interposition of the spacer 5, the flanges 2 and 2' being located in the spacer 5. The sealing gaskets 6, 6' are then inserted, followed by the sleeves 4,4'. The dimensioning of the sleeves 4, 4' and the gaskets 6, 6' are such that they are a force fit in the joint. Finally, the ends 3' of the tubular metal sleeve are strained inwards so as to maintain the various components of the joint in axial tight compression.
It is clear that one end 3' of the sleeve 3 can already be formed in its frusto-conical configuration before the joint is assembled.
Referring to the embodiment shown in
Figure 3, the first and second pipes 7, 7' have bell-shaped deformed end portions 11, 11'. The insulating sleeves 10, which replace the insulating sleeves 4 of Figures 1 and 2, do not have a cylindrical inner surface but rather a shape determined by the bell-shaped end portions 11, 11'. The annular insulating spacer 5 is similar to that shown in Figures 1 and 2, while the sealing gaskets 9,9' are less wide than gaskets 6, 6.
When the pipes are formed of a material that can be easily deformed, such as copper or aluminium or when the flow path of fluid through the joint is not to be disturbed by an increase in pipe cross-section, an insulating spacer such as 12 in Figure 4 may be used. This spacer is an annular ring of H-cross section, the inner arm of the H being substantially longer than the outer arm so that it occupies the extra pipe cross-section defined by the bell-shaped end portions 11,11'.
In the embodiment shown in Figure 5, the tubular metal sleeve is integral with the second pipe. More particularly the second pipe is provided with an intermediate portion in the form of a shoulder 13 which connects the sleeve to the un-deformed part of the second pipe. The insulating spacer 14 is in the form an annular ring of L-section, one leg of the "L" being in contact with the shoulder 13. In this case only one sealing gasket 6 and only one sleeve 4 is provided. In this case this first pipe 1 is provided with a flange 2 as in Figures 1 and 2.
In Figure 6, the metal sleeve is again integral with the second pipe, in this case being connected by a frustoconical intermediate portion 15. The spacer 16 is an annular ring having a cross-section determined by the shape of the intermediate portion 15.
In Figure 7, the second pipe and metal sleeve are formed in the same manner as Figure 6. In this case however, the first pipe 17 has a longer bell-shaped deformed end portion, the edge of the first pipe 17 being bent in again at 18. The cross-section of the insulating spacer 19 is determined by the shape of the portions 15 and 18.
The method of assembly of the joints shown in Figures 2, 3 to 7, is similar to that described in connection with Figures 1 and 2.
Following the embodiments described in this specification we achieve insulating joints in which hydraulic leakages are practically impossible as the spacing insulating and sealing member is located and tightly compressed in a space whose volume does not undergo any changes under the mechanical stresses for which the joint has been designed and the areas having the task to perform the initial sealing are circular sections 5'. In realizing the joint of this invention it has been also foreseen that the couplings, particularly between flanges 2 and 2' and the annular spacer 5 and also every other coupling between components making up the joints, are provided with an adhesive or a hot or cold thermosetting resin so that the various couplings create integral parts among said different components of the joint.
In the case of conductive fluids, the tubular
members may have an inner coating 8 provided by a paint or by an electrically insulating resin.
The various insulating sleeves 4, 4 and
10, 10' as well as the insulating annular spacers 5, 12, 14, 16 and 19 can be formed by a metal section provided with an insulating coating material, having a suitable thickness, on those sides where such a coating is essential to obtain the functionality of the joint.
WHAT WE CLAIM IS:
1. An electrically insulating pipe coupling comprising:
a first metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof;
a second metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof, said first and second pipes being coaxial and spaced with their respective deformed end portions mutually adjacent;
a tubular metal sleeve coaxial with said first and second pipes, and being positioned so as to define an annular space between the inner surface thereof and at least the end portion of said first pipe;
a spacer formed of electrically insulating material and positioned between and in contact with the end portion of the first pipe and the end portion of the second pipe;
an elastic sealing gasket positioned in said annular space and in contact with said spacer, said inner surface of said tubular metal sleeve and the outer surface of the end portion of the first pipe; and
a blocking element in the form of a sleeve of electrically insulating material positioned in said annular space and in contact with said sealing gasket to press said sealing gasket against said spacer, said blocking element having a truncated conical portion and said tubular metal sleeve having a portion capable of being deformed into a corresponding truncated conical shape to hold said blocking member in position.
2. An electrically insulating pipe coupling according to claim 1, wherein said tubular metal sleeve is non-integral with said first and second pipes.
3. An electrically insulating pipe coupling according to claim 2, wherein the deformed end portion of each of said pipes is constituted by a flange formed on the respective pipe.
4. An electrically insulating pipe coupling according to claim 2, wherein the deformed end portion of each said pipes is constituted by a bell-shaped end portion.
5. An electrically insulating pipe coupling according to any one of claims 2 to 4, further comprising a second elastic sealing gasket positioned in said annular space and in contact with said inner surface of said tubular metal sleeve, and the outer surface of the end portion of the second pipe and said spacer on the face thereof remote from the first elastic sealing gasket and a second blocking element in the from of a sleeve of electrically insulating ma
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (15)
1. An electrically insulating pipe coupling comprising:
a first metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof;
a second metal pipe having an end portion which is symmetrically deformed in a direction away from the axis thereof, said first and second pipes being coaxial and spaced with their respective deformed end portions mutually adjacent;
a tubular metal sleeve coaxial with said first and second pipes, and being positioned so as to define an annular space between the inner surface thereof and at least the end portion of said first pipe;
a spacer formed of electrically insulating material and positioned between and in contact with the end portion of the first pipe and the end portion of the second pipe;
an elastic sealing gasket positioned in said annular space and in contact with said spacer, said inner surface of said tubular metal sleeve and the outer surface of the end portion of the first pipe; and
a blocking element in the form of a sleeve of electrically insulating material positioned in said annular space and in contact with said sealing gasket to press said sealing gasket against said spacer, said blocking element having a truncated conical portion and said tubular metal sleeve having a portion capable of being deformed into a corresponding truncated conical shape to hold said blocking member in position.
2. An electrically insulating pipe coupling according to claim 1, wherein said tubular metal sleeve is non-integral with said first and second pipes.
3. An electrically insulating pipe coupling according to claim 2, wherein the deformed end portion of each of said pipes is constituted by a flange formed on the respective pipe.
4. An electrically insulating pipe coupling according to claim 2, wherein the deformed end portion of each said pipes is constituted by a bell-shaped end portion.
5. An electrically insulating pipe coupling according to any one of claims 2 to 4, further comprising a second elastic sealing gasket positioned in said annular space and in contact with said inner surface of said tubular metal sleeve, and the outer surface of the end portion of the second pipe and said spacer on the face thereof remote from the first elastic sealing gasket and a second blocking element in the from of a sleeve of electrically insulating ma
terial positioned in said annular space and in contact with said second sealing gasket to press said second sealing gasket against said spacer, said second blocking element having a truncated conical portion and said tubular metal sleeve having a second portion capable of being deformed into a corresponding truncated conical shape to hold said second blocking member in position.
6. An electrically insulating pipe coupling according to any one of claims 1 to 5, wherein said spacer is an annular ring with a T-shaped section.
7. An electrically insulating pipe coupling according to claim 4, wherein said spacer is an annular ring with an H-shaped section having the radially inner arm of the "H" longer than the radially outer arm thereof, the spaces between the arms of the "H" being so dimensioned as to receive the bell shaped end portions of the respective pipes.
8. An electrically insulating pipe coupling according to claim 1, wherein said tubular metal sleeve is integral with said second pipe.
9. An electrically insulating pipe coupling according to claim 8, wherein the deformed end portion of said second pipe is constituted by said tubular metal sleeve and by an annular intermediate portion connecting said tubular metal sleeve to the remaining part of said second pipe.
10. An electrically insulating pipe coupling according to claim 9, wherein said spacer has one face thereof, opposite to that face which is in contact with the sealing gasket, in contact with said intermediate portion of said second pipe.
11. An electrically insulating pipe coupling according to claim 10, wherein said intermediate portion is an annular shoulder formed on said second pipe and said spacer is an annular ring of L-shaped section, one arm of the "L" bearing against said shoulder.
12. An electrically insulating pipe coupling according to any one of claims 1 to 11, wherein the contacting surfaces of the various components of the coupling are provided with a layer of an adhesive or of a hot or cold thermosetting resin.
13. An electrically insulating pipe coupling according to any one of claims 1 to 12, wherein the surfaces of the pipes are at least partially coated with paint or an insulating resin.
14. An electrically insulating pipe coupling according to any one of claims 1 to 13, wherein those surfaces in contact with the or each sealing gasket have circular configurations.
15. An electrically insulating pipe coupling substantially as herein before described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1044075A CH595580A5 (en) | 1975-08-11 | 1975-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1559291A true GB1559291A (en) | 1980-01-16 |
Family
ID=4363256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3121276A Expired GB1559291A (en) | 1975-08-11 | 1976-07-27 | Electrically insulated pipe coupling |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5222786A (en) |
| BR (1) | BR7605135A (en) |
| CA (1) | CA1047063A (en) |
| CH (1) | CH595580A5 (en) |
| DE (1) | DE2636402A1 (en) |
| ES (1) | ES450575A1 (en) |
| FR (1) | FR2321087A1 (en) |
| GB (1) | GB1559291A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190444A (en) * | 1986-05-14 | 1987-11-18 | Angli Holding Bv | Electrically insulated pipe joint |
| GB2216211A (en) * | 1988-02-12 | 1989-10-04 | Angli Holding Bv | Insulated pipe joint |
| GB2264992A (en) * | 1992-03-11 | 1993-09-15 | Usui Kokusai Sangyo Kk | Joint for connecting thin pipes |
| GB2350655A (en) * | 1999-06-04 | 2000-12-06 | Rover Group | A joint for use in the manufacture of motor vehicle spaceframes |
| EP1091157A1 (en) * | 1999-10-07 | 2001-04-11 | Valter Zoboli | Dielectric pipe joint, particularly for underground pipes |
| EP1313181A1 (en) * | 2001-11-19 | 2003-05-21 | GSI Lumonics Ltd. | Crimped rod tube |
| WO2014048680A1 (en) * | 2012-09-26 | 2014-04-03 | Abb Technology Ag | Isolating conduit for a dielectric fluid |
| CN107143708A (en) * | 2017-06-01 | 2017-09-08 | 宁波天生密封件有限公司 | Sealing and connecting device |
| CN111795235A (en) * | 2019-04-02 | 2020-10-20 | 克罗姆普顿科技集团有限公司 | Electrical isolator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2450990A1 (en) * | 1979-03-09 | 1980-10-03 | Mosettig Jean | DEVICE FOR SEALING A SLEEVE TO AN INSULATED ELECTRICAL CONDUCTOR OR TO A PIPE AND METHOD FOR PRODUCING A TUBULAR SEAL USING THE SAME |
| IT1246600B (en) * | 1991-04-15 | 1994-11-24 | Prochind | INSULATING FLANGE FOR METAL CONDUITS |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1009262A (en) * | 1948-05-31 | 1952-05-27 | Le Tube D Acier | Electrical cut-off joint for buried pipes and household connections |
| US3185501A (en) * | 1961-04-12 | 1965-05-25 | Mueller Co | Electrical insulating pipe coupling |
| FR1336827A (en) * | 1962-07-25 | 1963-09-06 | Vallourec | Tamper-evident insulating fitting for metal pipes |
| FR1528306A (en) * | 1966-07-06 | 1968-06-07 | Prefabricated gasket, electrically insulating, for metal conduits of liquids or gases | |
| GB1249839A (en) * | 1968-12-21 | 1971-10-13 | Luigi Bagnulo | Electrically insulating joint for metallic pipe lines |
-
1975
- 1975-08-11 CH CH1044075A patent/CH595580A5/xx not_active IP Right Cessation
-
1976
- 1976-07-27 GB GB3121276A patent/GB1559291A/en not_active Expired
- 1976-08-04 BR BR7605135A patent/BR7605135A/en unknown
- 1976-08-05 JP JP9285576A patent/JPS5222786A/en active Pending
- 1976-08-09 CA CA258,686A patent/CA1047063A/en not_active Expired
- 1976-08-09 ES ES450575A patent/ES450575A1/en not_active Expired
- 1976-08-09 FR FR7624268A patent/FR2321087A1/en not_active Withdrawn
- 1976-08-11 DE DE19762636402 patent/DE2636402A1/en not_active Withdrawn
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2190444A (en) * | 1986-05-14 | 1987-11-18 | Angli Holding Bv | Electrically insulated pipe joint |
| GB2190444B (en) * | 1986-05-14 | 1990-01-24 | Angli Holding Bv | Electrically insulated pipe joint |
| AU597653B2 (en) * | 1986-05-14 | 1990-06-07 | Angli Holding B.V. | Electrically insulated pipe joint |
| GB2216211A (en) * | 1988-02-12 | 1989-10-04 | Angli Holding Bv | Insulated pipe joint |
| GB2216211B (en) * | 1988-02-12 | 1992-01-02 | Angli Holding Bv | Insulated pipe joints and methods for forming them. |
| GB2264992A (en) * | 1992-03-11 | 1993-09-15 | Usui Kokusai Sangyo Kk | Joint for connecting thin pipes |
| GB2264992B (en) * | 1992-03-11 | 1995-06-14 | Usui Kokusai Sangyo Kk | Pipe connecting joint |
| GB2350655A (en) * | 1999-06-04 | 2000-12-06 | Rover Group | A joint for use in the manufacture of motor vehicle spaceframes |
| EP1091157A1 (en) * | 1999-10-07 | 2001-04-11 | Valter Zoboli | Dielectric pipe joint, particularly for underground pipes |
| US6616192B1 (en) | 1999-10-07 | 2003-09-09 | Valter Zoboli | Dielectric pipe joint, particularly for underground pipes |
| EP1313181A1 (en) * | 2001-11-19 | 2003-05-21 | GSI Lumonics Ltd. | Crimped rod tube |
| US6693940B2 (en) | 2001-11-19 | 2004-02-17 | Gsi Lumonics Ltd. | Laser rod pump chamber and method |
| WO2014048680A1 (en) * | 2012-09-26 | 2014-04-03 | Abb Technology Ag | Isolating conduit for a dielectric fluid |
| CN107143708A (en) * | 2017-06-01 | 2017-09-08 | 宁波天生密封件有限公司 | Sealing and connecting device |
| CN111795235A (en) * | 2019-04-02 | 2020-10-20 | 克罗姆普顿科技集团有限公司 | Electrical isolator |
| CN111795235B (en) * | 2019-04-02 | 2023-05-09 | 克罗姆普顿科技集团有限公司 | Electrical isolator |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7605135A (en) | 1978-02-28 |
| CH595580A5 (en) | 1978-02-15 |
| ES450575A1 (en) | 1977-11-16 |
| JPS5222786A (en) | 1977-02-21 |
| CA1047063A (en) | 1979-01-23 |
| FR2321087A1 (en) | 1977-03-11 |
| DE2636402A1 (en) | 1977-02-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |