GB1581051A - Pipe jointing arrangements and pipes therefor - Google Patents

Pipe jointing arrangements and pipes therefor Download PDF

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Publication number
GB1581051A
GB1581051A GB10350/77A GB1035077A GB1581051A GB 1581051 A GB1581051 A GB 1581051A GB 10350/77 A GB10350/77 A GB 10350/77A GB 1035077 A GB1035077 A GB 1035077A GB 1581051 A GB1581051 A GB 1581051A
Authority
GB
United Kingdom
Prior art keywords
pipe
pipe lengths
collar
lengths
pipe length
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
Application number
GB10350/77A
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.)
Reed International Ltd
Original Assignee
Reed International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reed International Ltd filed Critical Reed International Ltd
Priority to GB10350/77A priority Critical patent/GB1581051A/en
Priority to ZA00776935A priority patent/ZA776935B/en
Priority to NZ185735A priority patent/NZ185735A/en
Priority to AU30944/77A priority patent/AU510964B2/en
Priority to ES464791A priority patent/ES464791A1/en
Priority to SE7802474A priority patent/SE7802474L/en
Priority to NO780781A priority patent/NO780781L/en
Priority to DE19782809666 priority patent/DE2809666A1/en
Priority to NLAANVRAGE7802595,A priority patent/NL187990C/en
Priority to FR7806751A priority patent/FR2383383A1/en
Priority to BE185802A priority patent/BE864743A/en
Priority to IT21093/78A priority patent/IT1093825B/en
Priority to CH265978A priority patent/CH629288A5/en
Priority to DK109678AA priority patent/DK151353B/en
Priority to FI780773A priority patent/FI780773A/en
Publication of GB1581051A publication Critical patent/GB1581051A/en
Priority to HK530/82A priority patent/HK53082A/en
Priority to MY148/83A priority patent/MY8300148A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0849—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid being turned through an angle when passing from one joint element to another

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The axes of the end sectors of two pipes which are to be connected usually coincide. The device allows connections, when these axes make a certain angle between them, which can be oriented at will in space. The adjacent ends of the two pipes (1, 2) are cut obliquely in planes making the same angle with the longitudinal axes (3, 4) of the end sectors. Since the inner profile of this oblique section is elliptical to start with, it is made circular by a suitable thinning of the wall of the pipe. By virtue of this circular cross-section, the pipes may, before permanent connection, be oriented with respect to each other by simply rotating one with respect to the other, without there being any cranking inside the connection. A pipe thus connected can be used for drain water and water containing products in suspension. <IMAGE>

Description

(54) PIPE JOINTING ARRANGEMENTS AND PIPES THEREFOR (71) We, REED INTERNATIONAL LIMITED, a Company incorporated under the laws of Great Britain, of 82 Piccadilly London W.i., 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 particularly described in and by the following statement: This invention relates to jointing arrangements between two interconnected pipe lengths of equal internal diameter and in particular to jointing arrangements which permit a variable angular orientation of the two pipe lengths. The invention also relates to pipe lengths for use in such jointing arrangements and to methods of forming such jointing arrangements.
The invention has particluar, but not exclusive application to jointing arrangements for plastics pipes used in underground service conduits, for example soil pipelines.
According to a first aspect of the invention there is provided a jointing arrangement between two interconnected pipe lengths of equal internal diameter, the adjacent end faces of the two pipe lengths lying in planes oblique to their respective longitudinal axes and abutting each other, wherein the wall thickness of each of said pipe lengths adjacent its said end face varies circumferentially without stepped interruption of the internal surface of the pipe length so that the internal surfaces of said pipe lengths at said end faces are circular in said oblique planes. Thus by the invention the elliptical internal cross-sections which would result from simply cutting the end faces of the pipe lengths obliquely are converted to circular cross-sections to obviate the stepped joint which would occur between the internal surfaces of the pipe lengths.
Advantageously the jointing arrangement includes coupling means between the pipe lengths, which coupling means permit rotation of one of said pipe lengths about its longitudinal axis relative to the other pipe length to cause said abutting end faces to slide one over the other and so vary the angular orientation of the two pipe lengths.
The pipe lengths may be sealed together either by bonding (e.g. solvent welding) after the pipe lengths have been set to the desired angular orientation or through sealing rings.
According to a second aspect of the invention there is provided a pipe length for a jointing arrangement according to the first aspect, wherein an end face of said pipe length extends in a plane oblique to its longitudinal axis and the wall thickness of said pipe length adjacent said end face varies circumferentially without stepped interruption of the internal surface of said pipe length so that the internal surface of said pipe length at said end face is circular in said oblique plane.
According to a further aspect of the invention there is provided a method of forming the jointing arrangement according to the first aspect of the invention wherein the said end faces are brought into abutment and the pipe lengths coupled together and one said pipe length is rotated about its longitudinal axis relative to the other to set the pipe lengths at a desired angular orientation.
The invention will now be further explained by way of example with reference to the accompanying drawings in which Figures 1 to 4 illustrate the principle of the invention and Figures 5 to 11 illustrate embodiments of the invention.
Thus:- Figure I is an end elevation of one of the pipe lengths in the plane of its oblique end face, Figure 2 is a section on the line A-A of Figure 1.
Figure 3 is a view in the direction of arrow Z in Figure 2.
Figure 4 illustrates various angular orientations in which the two pipe lengths can be jointed together.
Figure 5 is a sectional view of a first em bodiment of the invention in a solvent welded type coupling.
Figure 6 is a view in the direction of the arrow Y in Figure 5 of one of the pipe lengths.
Figure 7 is a sectional view of a second embodiment.
Figure 8 shows to an enlarged scale a sec tional view of part of the second embodiment on the line B-B of Figure 9.
Figure 9 shows a sectional view on the line C-C of Figure 8.
Figure 10 shows a sectional view of a third embodiment of the invention on the line D-D of Figure 11, and Figure 11 shows a sectional view on the line E-E of Figure 10.
Referring to Figures 1 to 4, the end faces of two pipe lengths 1 and 2 of plastics material are formed so that they extend in planes which are oblique to the respective longitudinal axes 3 and 4 of the pipe lengths and have the same angle of obliqueness. Hence if the two pipe lengths are fitted together with the two end faces abutting and the pipe length 2 is rotated about its longitudinal axis, the end faces will ride over each other to cause the pipe length 2 to assume different angular orientations with respect to the pipelength 1. Three such orientations are shown in Figure 4. In fact in one coonplete revolution, the axis 4 of the pipe length 2 will generate a cone.
If the wall thickness of the pipe lengths 1 and 2 at the end faces is uniform, then due to the elliptical cross-sections of their oblique end faces, a step will occur at the joint between the two pipe lengths when the two pipe lengths are other than coaxial. To avoid this the wall thickness of the pipe lengths is varied circumferentially and without stepped interruption of their internal surfaces so that as seen in the planes d the oblique end faces the internal surfaces of the pipe lengths are circular. The way that this is done can be appreciated from Figures 1, 2 and 3. With a uniform wall thickness the major axis of the elliptical internal cross-section is KL and the minor axis M N. To form a circle centred at 0 and of radius OK it is necessary to thin the wall as shown from dotted line so that MlNl=KL.
For a pipe length of for example 103 mm internal diameter and an angle of obliqueness a of 11410 for the end faces it can be calculated that KL=MlNl=l105.02 mm.
Referring now to Figures 5 and 6 this shows a first embodiment of the invention in a solvent-welded type coupling. To effect coupling of the two pipe lengths 1 and 2 the pipe length 1 is provided with an integral male formation 6 comprising a cuff surrounding the pipe length 1 and the pipe length 2 is provided with an integral female formation 7 comprising a socket-form extension from the end face of the pipe length. To permit rot an tion of the pipe length 2 about its longitudinal axis 4 relative to the other pipe length 1 li order to set the pipe lengths at a desired angular orientation, the mating surfaces of the formations 6 and 7 define a cone whose axis is aligned with the axis of the cone generated by the longitudinal axis 4 of the pipe length 2 as the pipe length 2 is rotated.
The socket-form extension 7 is provided at its outer edge with a lip 8 which snaps behind the rearward edge of the cuff 6. To increase the flexibility of the lip 8 it is formed with interruptions 81 as shown in Figure 6.
Solvent is applied to the mating surfaces of the formations 6 and 7, so that after the pipe lengths have been set to the desired angular orientation they become welded together.
As shown in Figure 5 the pipe length 2 is formed at its end remote from the joint with the pipe length 1 as a conventional socket for receiving the spigot of another pipe length.
Alternatively it could be formed as a spigot, as is the remote end of the pipe length 1.
The actual pipe lengths 1 and 2 can be formed of different lengths, but advantageously they will be fairly short as shown so that they conveniently form an elbow piece of varying angle between two straight pipe lengths.
Referring to Figures 7 to 9 a second embodiment of the invention is shown. In this embodiment the pipe lengths 1 and 2 are formed at their abutting end faces with flanges 9 and 10 which when the two pipe lengths are fitted together define a channel for locating a sealing ring 12. The two pipe lengths 1 and 2 are coupled together by a coupling assembly which comprises a collar 13 of channel cross-section whose side walls 14 and 15 engage the remote side surfaces of the flanges 9 and 10. The collar 13 is a split collar to enable it to be fitted around the pipe lengths 1 and 2, one half of this collar being shown in Figures 7 to 9. The collar 13 is held together by a circumferential plastics band 16 which is push-fitted over the collar so that it locates on either side of collar 13 by its two beads 17 and 18. The inherent resilience of the band 16 permits it to deform sufficiently for one of the beads to pass over the collar.
Referring to Figures 10 and 11 these show an embodiment similar to that of Figures 7 to 9 in that the flanges 9 and 10 and sealing ring 12 are again provided. A split collar 20 performing the same function as the collar 13 is also provided. However in this embodiment the two parts of the collar at their diametrical join are provided with projections which come together to form a dovetail 22 as seen in Figure 11. Plastics clips 23 having complementary dovetail channels are slid over the dovetails 22 to hold the collar 20 together.
As can be seen from Figure 10 the clips 23 locate at their ends on the collar by a small bead 24 and end wall 25.
WHAT WE CLAIM IS: 1. A jointing arrangement between two interconnected pipe lengths of equal internal diameter, the adjacent end faces of the two pipe lengths lying in planes oblique to their respective longitudinal axes and abutting each
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (18)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    tional view of part of the second embodiment on the line B-B of Figure 9.
    Figure 9 shows a sectional view on the line C-C of Figure 8.
    Figure 10 shows a sectional view of a third embodiment of the invention on the line D-D of Figure 11, and Figure 11 shows a sectional view on the line E-E of Figure 10.
    Referring to Figures 1 to 4, the end faces of two pipe lengths 1 and 2 of plastics material are formed so that they extend in planes which are oblique to the respective longitudinal axes 3 and 4 of the pipe lengths and have the same angle of obliqueness. Hence if the two pipe lengths are fitted together with the two end faces abutting and the pipe length 2 is rotated about its longitudinal axis, the end faces will ride over each other to cause the pipe length 2 to assume different angular orientations with respect to the pipelength 1. Three such orientations are shown in Figure 4. In fact in one coonplete revolution, the axis 4 of the pipe length 2 will generate a cone.
    If the wall thickness of the pipe lengths 1 and 2 at the end faces is uniform, then due to the elliptical cross-sections of their oblique end faces, a step will occur at the joint between the two pipe lengths when the two pipe lengths are other than coaxial. To avoid this the wall thickness of the pipe lengths is varied circumferentially and without stepped interruption of their internal surfaces so that as seen in the planes d the oblique end faces the internal surfaces of the pipe lengths are circular. The way that this is done can be appreciated from Figures 1, 2 and 3. With a uniform wall thickness the major axis of the elliptical internal cross-section is KL and the minor axis M N. To form a circle centred at 0 and of radius OK it is necessary to thin the wall as shown from dotted line so that MlNl=KL.
    For a pipe length of for example 103 mm internal diameter and an angle of obliqueness a of 11410 for the end faces it can be calculated that KL=MlNl=l105.02 mm.
    Referring now to Figures 5 and 6 this shows a first embodiment of the invention in a solvent-welded type coupling. To effect coupling of the two pipe lengths 1 and 2 the pipe length 1 is provided with an integral male formation 6 comprising a cuff surrounding the pipe length 1 and the pipe length 2 is provided with an integral female formation
    7 comprising a socket-form extension from the end face of the pipe length. To permit rot an tion of the pipe length 2 about its longitudinal axis 4 relative to the other pipe length 1 li order to set the pipe lengths at a desired angular orientation, the mating surfaces of the formations 6 and 7 define a cone whose axis is aligned with the axis of the cone generated by the longitudinal axis 4 of the pipe length 2 as the pipe length 2 is rotated.
    The socket-form extension 7 is provided at its outer edge with a lip 8 which snaps behind the rearward edge of the cuff 6. To increase the flexibility of the lip 8 it is formed with interruptions 81 as shown in Figure 6.
    Solvent is applied to the mating surfaces of the formations 6 and 7, so that after the pipe lengths have been set to the desired angular orientation they become welded together.
    As shown in Figure 5 the pipe length 2 is formed at its end remote from the joint with the pipe length 1 as a conventional socket for receiving the spigot of another pipe length.
    Alternatively it could be formed as a spigot, as is the remote end of the pipe length 1.
    The actual pipe lengths 1 and 2 can be formed of different lengths, but advantageously they will be fairly short as shown so that they conveniently form an elbow piece of varying angle between two straight pipe lengths.
    Referring to Figures 7 to 9 a second embodiment of the invention is shown. In this embodiment the pipe lengths 1 and 2 are formed at their abutting end faces with flanges 9 and 10 which when the two pipe lengths are fitted together define a channel for locating a sealing ring 12. The two pipe lengths 1 and 2 are coupled together by a coupling assembly which comprises a collar 13 of channel cross-section whose side walls 14 and 15 engage the remote side surfaces of the flanges 9 and 10. The collar 13 is a split collar to enable it to be fitted around the pipe lengths 1 and 2, one half of this collar being shown in Figures 7 to 9. The collar 13 is held together by a circumferential plastics band 16 which is push-fitted over the collar so that it locates on either side of collar 13 by its two beads 17 and 18. The inherent resilience of the band 16 permits it to deform sufficiently for one of the beads to pass over the collar.
    Referring to Figures 10 and 11 these show an embodiment similar to that of Figures 7 to 9 in that the flanges 9 and 10 and sealing ring 12 are again provided. A split collar 20 performing the same function as the collar 13 is also provided. However in this embodiment the two parts of the collar at their diametrical join are provided with projections which come together to form a dovetail 22 as seen in Figure 11. Plastics clips 23 having complementary dovetail channels are slid over the dovetails 22 to hold the collar 20 together.
    As can be seen from Figure 10 the clips 23 locate at their ends on the collar by a small bead 24 and end wall 25.
    WHAT WE CLAIM IS: 1. A jointing arrangement between two interconnected pipe lengths of equal internal diameter, the adjacent end faces of the two pipe lengths lying in planes oblique to their respective longitudinal axes and abutting each
    other, wherein the wall thickness of each of said pipe lengths adjacent its said end face varies circumferentially without stepped interruption of the internal surface of the pipe length so that the internal surfaces of said pipe lengths at said end faces are circular in said oblique planes.
  2. 2. A jointing arrangement according to claim 1, and including coupling means between the pipe lengths, which coupling means permit rotation of one of said pipe lengths about its longitudinal axis relative to the other pipe length to cause said abutting end faces to slide one over the other and so vary the angular orientation of the two pipe lengths.
  3. 3. A jointing arrangement according to claim 2, wherein said coupling means comprise a male formation on one of said pipe lengths and a complementary female formation on the other of said pipe lengths.
  4. 4. A jointing arrangement according to claim 3, wherein said male and female formations are formed integrally with said pipe lengths, said male formation comprising a cuff surrounding its associated pipe length and said female formation comprising a socketform extension from said end face of its associated pipe length.
  5. 5. A jointing arrangement according to claim 4, wherein said cuff is a snap fit in said socket-form extension.
  6. 6. A jointing arrangement according to claim 2, wherein said pipe lengths are formed on their outer surfaces with circumferentially extending flanges and said coupling means engage said flanges to grip said pipe lengths together.
  7. 7. A jointing arrangement according to claim 6, wherein a sealing ring is held in compression between said flanges to seal off the joint between said pipe lengths.
  8. 8. A jointing arrangement according to claim 6 or 7, wherein said coupling means comprise a sp]it collar of channel cross-section whose side walls engage the remote side surfaces of said flanges and means for holding the sections of said collar together after they have been fitted to said pipe lengths.
  9. 9. A jointing arrangement according to claim 8, wherein said holding means comprises a band extending circumferentially of said collar and which is push fitted on to said collar.
  10. 10. A jointing arrangement according to claim 9, wherein said band has beads formed around its two side edges and which locate on either side of said collar to retain the collar in position.
  11. 11. A jointing arrangement according to claim 8, wherein the sections of said collar at a join together define a radially outward extending projection on to which said holding means is push fitted.
  12. 12. A jointing arrangement according to claim 11, wherein said projections are of dovetail shape in cross-section and said holding means comprise clips having complementary dovetail channels.
  13. 13. A pipe length for a jointing arrangement according to any preceding claim, wherein an end face of said pipe length extends in a plane oblique to its longitudinal axis and the wall thickness of said pipe length adjacent said end face varies circumferentially without stepped interruption of the internal surface of said pipe length so that the internal surface of said pipe length at said end face is circular in said oblique plane.
  14. 14. A pipe length according to claim 13 and provided with means on its outer surface forming part of or enabling it to associate with the coupling means specified in any one claims 2 to 12.
  15. 1S. A method of forming a jointing arrangement according to any claims 1 to 12, wherein said end faces of said two pipe lengths are brought into abutment and the pipe lengths coupled together and one said pipe length is rotated about its longitudinal axis relative to the other to set the pipe lengths at a desired angular orientation.
  16. 16. A method according to claim 15, wherein said pipe lengths are bonded together after being set at the desired angular orientation.
  17. 17. A jointing arrangement substantially as hereinbefore described with reference to Figures 1 to 4 or Figures 5 and 6 or Figures 7 to 9 or Figures 10 and 11 of the accompanying drawings.
  18. 18. A pipe length for utilisation in a jointing arrangement substantially as hereinbefore described with reference to Figures 1 to 4, or Figures 5 and 6 or Figures 7 to 9 or Figures 10 and 11 of the accompanying drawings.
GB10350/77A 1977-03-11 1977-03-11 Pipe jointing arrangements and pipes therefor Expired GB1581051A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
GB10350/77A GB1581051A (en) 1977-03-11 1977-03-11 Pipe jointing arrangements and pipes therefor
ZA00776935A ZA776935B (en) 1977-03-11 1977-11-21 Pipe jointing arrangements
NZ185735A NZ185735A (en) 1977-03-11 1977-11-21 Pipe jointing which permits a variable angular orientation of two equal internal diameter pipe lenghts
AU30944/77A AU510964B2 (en) 1977-03-11 1977-11-24 Pipe jointing arrangement
ES464791A ES464791A1 (en) 1977-03-11 1977-12-06 Pipe jointing arrangements and pipes therefor
SE7802474A SE7802474L (en) 1977-03-11 1978-03-03 DEVICE FOR ROUGH COUPLINGS
NO780781A NO780781L (en) 1977-03-11 1978-03-07 CONNECTION DEVICE BETWEEN TWO PIPE PIECES
DE19782809666 DE2809666A1 (en) 1977-03-11 1978-03-07 PIPE COUPLING AND METHOD FOR PRODUCING A PIPE COUPLING
FR7806751A FR2383383A1 (en) 1977-03-11 1978-03-09 PIPE CONNECTION DEVICE
NLAANVRAGE7802595,A NL187990C (en) 1977-03-11 1978-03-09 PIPE CONNECTOR.
BE185802A BE864743A (en) 1977-03-11 1978-03-10 PIPE ASSEMBLY SYSTEMS
IT21093/78A IT1093825B (en) 1977-03-11 1978-03-10 JUNCTION ARRANGEMENT BETWEEN TWO SECTIONS OF PIPE
CH265978A CH629288A5 (en) 1977-03-11 1978-03-10 Device for connecting two pipes
DK109678AA DK151353B (en) 1977-03-11 1978-03-10 ROUTE COLLECTION BETWEEN TO ROUTER LENGTHS
FI780773A FI780773A (en) 1977-03-11 1978-03-10 ANSLUTNINGSARRANGEMANG
HK530/82A HK53082A (en) 1977-03-11 1982-12-07 Pipe jointing arrangements and pipes therefor
MY148/83A MY8300148A (en) 1977-03-11 1983-12-30 Pipe joining arrangements and pipes therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10350/77A GB1581051A (en) 1977-03-11 1977-03-11 Pipe jointing arrangements and pipes therefor

Publications (1)

Publication Number Publication Date
GB1581051A true GB1581051A (en) 1980-12-10

Family

ID=9966233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10350/77A Expired GB1581051A (en) 1977-03-11 1977-03-11 Pipe jointing arrangements and pipes therefor

Country Status (17)

Country Link
AU (1) AU510964B2 (en)
BE (1) BE864743A (en)
CH (1) CH629288A5 (en)
DE (1) DE2809666A1 (en)
DK (1) DK151353B (en)
ES (1) ES464791A1 (en)
FI (1) FI780773A (en)
FR (1) FR2383383A1 (en)
GB (1) GB1581051A (en)
HK (1) HK53082A (en)
IT (1) IT1093825B (en)
MY (1) MY8300148A (en)
NL (1) NL187990C (en)
NO (1) NO780781L (en)
NZ (1) NZ185735A (en)
SE (1) SE7802474L (en)
ZA (1) ZA776935B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214590A (en) * 1987-12-24 1989-09-06 Weber Srl Swivel pipe coupling for fuel injectors
US5578171A (en) * 1993-02-18 1996-11-26 Valmet Corporation Method and device for supplying pulp to a headbox of a paper machine
GB2427450A (en) * 2005-06-21 2006-12-27 Kenneth Latimer Scott Pipe and pipe lining method using rotatable, interengaged pipe sections
GB2443198A (en) * 2006-10-24 2008-04-30 Kenneth Latimer Scott A method of lining pre-existing pipes or passages and apparatus therefor
WO2014062072A1 (en) * 2012-10-19 2014-04-24 Fulmac Products Limited Improvements to manhole assemblies
CN107763354A (en) * 2017-10-23 2018-03-06 陈光化 A kind of adjustable elbow

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024549A1 (en) * 1995-12-28 1997-07-10 Joti Vvs A/S Variably settable branchpipe
DE19827010A1 (en) * 1998-06-17 2000-01-20 Fraunhofer Ges Forschung Pipe and pipe connection element for gas and water supplies

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1836336A (en) * 1923-07-27 1931-12-15 Commerce Guardian Trust & Savi Pipe joint
GB387804A (en) * 1931-12-15 1933-02-16 Daniel Benson Replogle Improvements in or relating to pipe joints
GB392734A (en) * 1932-05-06 1933-05-25 Alfred Lenze Pipe connection
US2020156A (en) * 1933-01-21 1935-11-05 Locomotive Finished Material C Conduit joint forming means
GB450291A (en) * 1935-11-14 1936-07-14 Ernst Waldemar Friberg Improvements in pipe couplings
GB798650A (en) * 1955-11-15 1958-07-23 Dairy Pipe Lines Ltd Improvements in pipe couplings
DE1972349U (en) * 1965-02-22 1967-11-09 Mario Vedovelli Cernobbio PIPING ELEMENT.
FR1469425A (en) * 1966-02-21 1967-02-10 piping element
US3406991A (en) * 1967-04-24 1968-10-22 Midland Ross Corp Flange and backup ring for a conduit joint
JPS514287B1 (en) * 1970-09-18 1976-02-10
DE2306642A1 (en) * 1973-02-10 1974-09-05 Kessel Bernhard ANGLE CHANGEABLE KNEE FOR CONNECTING PIPES
IT1024082B (en) * 1974-06-03 1978-06-20 Menicucci B ADJUSTABLE JOINT SLEEVE

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214590A (en) * 1987-12-24 1989-09-06 Weber Srl Swivel pipe coupling for fuel injectors
US4982983A (en) * 1987-12-24 1991-01-08 Weber S.R.L. Perfected injector supply fitting
GB2214590B (en) * 1987-12-24 1991-10-16 Weber Srl Perfected injector supply fitting
US5578171A (en) * 1993-02-18 1996-11-26 Valmet Corporation Method and device for supplying pulp to a headbox of a paper machine
GB2427450A (en) * 2005-06-21 2006-12-27 Kenneth Latimer Scott Pipe and pipe lining method using rotatable, interengaged pipe sections
GB2427450B (en) * 2005-06-21 2010-01-06 Kenneth Latimer Scott Pipelines and method of installation
GB2443198A (en) * 2006-10-24 2008-04-30 Kenneth Latimer Scott A method of lining pre-existing pipes or passages and apparatus therefor
GB2443198B (en) * 2006-10-24 2011-05-25 Kenneth Latimer Scott A method of lining pre-existing pipes or passages and apparatus therefor
WO2014062072A1 (en) * 2012-10-19 2014-04-24 Fulmac Products Limited Improvements to manhole assemblies
CN107763354A (en) * 2017-10-23 2018-03-06 陈光化 A kind of adjustable elbow

Also Published As

Publication number Publication date
ES464791A1 (en) 1978-09-01
SE7802474L (en) 1978-09-12
HK53082A (en) 1982-12-17
FR2383383A1 (en) 1978-10-06
AU3094477A (en) 1979-05-31
FR2383383B1 (en) 1984-08-03
FI780773A (en) 1978-09-12
NL187990C (en) 1992-03-02
NO780781L (en) 1978-09-12
CH629288A5 (en) 1982-04-15
IT7821093A0 (en) 1978-03-10
NL187990B (en) 1991-10-01
DE2809666A1 (en) 1978-09-14
DK151353B (en) 1987-11-23
DK109678A (en) 1978-09-12
IT1093825B (en) 1985-07-26
AU510964B2 (en) 1980-07-24
NZ185735A (en) 1981-05-01
DE2809666C2 (en) 1990-01-18
NL7802595A (en) 1978-09-13
MY8300148A (en) 1983-12-31
ZA776935B (en) 1978-09-27
BE864743A (en) 1978-07-03

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Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970223