WO1990008288A1 - Pipe coupling - Google Patents

Pipe coupling Download PDF

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Publication number
WO1990008288A1
WO1990008288A1 PCT/GB1990/000038 GB9000038W WO9008288A1 WO 1990008288 A1 WO1990008288 A1 WO 1990008288A1 GB 9000038 W GB9000038 W GB 9000038W WO 9008288 A1 WO9008288 A1 WO 9008288A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
socket
projections
pipe coupling
gripping portion
Prior art date
Application number
PCT/GB1990/000038
Other languages
French (fr)
Inventor
Anthony Roy Robson
Original Assignee
Royack 1 Limited
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 Royack 1 Limited filed Critical Royack 1 Limited
Publication of WO1990008288A1 publication Critical patent/WO1990008288A1/en

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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/10—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using a rotary external sleeve or ring on one part
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/02—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined
    • F16L37/04—Couplings of the quick-acting type in which the connection is maintained only by friction of the parts being joined with an elastic outer part pressing against an inner part by reason of its elasticity

Definitions

  • This invention relates to a pipe coupling having a socket for receiving an inserted pipe, and a gripping portion mounted in the socket and engageable with the outer periphery of the inserted pipe in order to prevent withdrawal of the pipe from the socket.
  • the invention has been developed primarily, though not exclusively, in connection with a pipe coupling for receiving a pipe which is intended to deliver a gaseous or liquid medium, in which case it is usually desirable for the pipe coupling to be capable of housing therein a sealing ring which can act between the socket and the outer periphery of the inserted pipe.
  • the gripping portion takes the form of a gripping ring which is radially compressible. Radial compression is applied to the ring, in order to exert a gripping action on the outer periphery of the inserted pipe, by means of co-operating frusto-conical surfaces on the ring and inside the socket and/or inside a nut screwing onto the socket and having an inwardly directed flange for urging the gripping ring axially into the socket.
  • the disadvantage of this known arrangement is that it is not possible to know and difficult to judge how much to tighten the nut to obtain a sufficient grip on the inserted pipe without risk of damage.
  • the gripping ring is a grab ring having deflectable teeth for effecting an automatic grip on a pipe inserted through it, but in addition to the disadvantages of not knowing whether the grip is adequate, whether it will be maintained, and if the inserted pipe has been damaged, it is necessary for the grab ring to be disposed axially farther into the socket than the sealing ring so that the latter can seal on a portion of the surface of the inserted pipe which is not scarred by the teeth of the grab ring. Furthermore, because the pipe cannot be inserted into the socket without the grip being effected automa ically, it is not possible to effect a trial of the coupling without then having to dismantle its constituent parts.
  • a pipe coupling comprising: a socket for receiving an inserted pipe and having an axially inner internal socket portion and an axially spaced outer socket portion; a resilient gripping portion located in the outer socket portion and arranged to be radially inwardly deformable so as to engage with and to prevent withdrawal of the inserted pipe from the socket; an encircling member rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the gripping portion radially between pipe-release and pipe engaging positions respectively, the encircling member being connected to said gripping portion to rotate the latter therewith: and a guide surface provided on said outer socket portion and engageable with said gripping portion in order to deform the latter resiliently to the pipe-engaging position upon rotation of the gripping portion by the encircling member when the latter is rotated to its operative position.
  • a pipe coupling according to the invention provides a simple but effective coupling for use with an inserted pipe, which can readily engage the inserted pipe via its gripping portion following a simple turning action applied to the encircling member and which can equally readily release the inserted pipe for withdrawal of the pipe from the socket of the coupling.
  • a mounting is provided in the socket for receiving an annular seal, such an an 0-ring, to engage sealingly with the outer periphery of the inserted pipe.
  • this mounting is provided adjacent to a shoulder forming a transition between the axially inner socket portion and the outer socket portion - which is usually of larger diameter than the inner socket portion so as to accommodate the gripping portion whereby the inner periphery of the later, when in the release position, is approximately in line with the inner surface of the inner socket portion.
  • the gripping portion may comprise two or more axially extending projections which are circumferentially spaced from each other about the inner wall of the outer socket portion, and preferably these projections are formed in one piece with the encircling member.
  • the guide surface provided on the outer socket portion may comprise a cam portion which preferably takes the form of a cam surface provided circumferential ly throughout the inner wall of the outer socket portion, whereby rotation of the gripping portion by the encircling member causes the projections thereof to move radially inwardly and outwardly according to the profile of the cam surface, to move between its pipe-release and its pipe-engaging positions.
  • the encircling member conveniently comprises a cap having an annular portion which overlies the outer socket portion and which has a co-operative radial flange and co ⁇ operating circumferential slot-type connection with the outer periphery of the socket, so as to be held captive axially while rotating between its operative and inoperative positions.
  • This co-operative connection may comprise a radially extending circumferential flange provided on the outer periphery of the socket, located approximately radially in line with the transition between the inner socket portion and the outer socket portion, and an annular slot formed in the inner surface of the annular portion of the cap.
  • a spacer washer is received by the outer socket portion and is spaced between the seal and the axially inner ends of the projections of the gripping portion.
  • the projections of the gripping portion may be provided with teeth or other gripping type serrations on their radially inner surfaces for engagement with the outer periphery of an inserted pipe.
  • a pipe coupling according to the invention is preferably made from moulded plastics material, and is particularly suitable for use with inserted pipes also made of plastics material.
  • Figure 1 is a longitudinal sectional view of the embodiment of pipe coupling
  • Figure 2 is a sectional view taken in a radial plane perpendicular to the longitudinal axis of the pipe coupling shown in Figure 1; and.
  • Figure 3 is a view, similar to Figure 2, of a modification to the pipe coupling.
  • an embodiment of pipe coupling according to the invention is designated generally by reference 10 and comprises a socket for receiving an inserted pipe (not shown) and having an axially inner internal socket portion 11 and an axially spaced outer socket portion 12.
  • a resilient gripping portion is located in the outer socket portion 12 and comprises three axially extending projections 13 which are radially inwardly deformable so as to engage with the outer periphery of an inserted pipe and to prevent withdrawal of the inserted pipe from the socket.
  • An encircling member in the form of a cap 14 is rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the projections 13 of the gripping portion radially between pipe-release and pipe- engaging positions respectively.
  • the encircling member 14 comprises an annular portion 15 which overlies the outer socket portion 12, and which has a co-operative radial flange and circumferential slot type connection with the outer periphery of the socket so as to be held captive axially while rotating between its operative and inoperative positions.
  • this co-operative connection comprises a radially outwardly extending flange 16 on the outer periphery of the socket, located substantially radially in line with the transition between the inner socket portion 11 and the outer socket portion 12, and an annular slot 17 formed in the inner wall of the annular portion 15 of the cap 14.
  • the cap 14 is connected to the projections 13 of the gripping portion so as to rotate the latter therewith, and in the illustrated embodiment this is provided by making the projections 13 in one piece with the moulding of the annular portion 15 of the cap 14.
  • the connection of the projections 13 to the cap 14 need not be an integral connection, but any other direct or indirect connection.
  • a guide surface in the form of a cam portion is provided on the outer socket portion 12 which makes suitable engagement with the radially outer cam surface portions 13a of the projections 13.
  • the cam portion takes the form of a cam profile surface 18 arranged along the inner wall of the outer socket portion 12 and which, as shown in Figure 2, has three radially outwardly extending recesses 19. each of which receives a respective one of the three projections 13 when the latter are in their pipe- release positions.
  • a mounting is provided in the socket for receiving an annular seal in the form of an 0-ring 21 , which is located adjacent a shoulder 22 which forms a transition between the inner socket portion 11 and the outer socket portion 12.
  • the outer socket portion 12 has a larger diameter than the inner portion 11, so as to accommodate the projections 13 of the gripping portion whereby the inner periphery of the latter, when in the release position, is approximately in line with the inner surface of the inner socket portion 11.
  • a washer 23 is positioned in the outer socket portion 12 between the seal 21 and the axially inner ends of the projection 13.
  • the projections 13 may be provided on their inner surfaces with gripping teeth or serrations.
  • the illustrated embodiment of pipe coupling is composed essentially of only two individual components, namely the socket forming the portions 11 and 12, and the cap forming both the operating member for the pipe coupling, and also the gripping portion engageable with the inserted pipe - via the projections 13, and these two components can be readily manufactured from plastics mouldings.
  • This therefore provides a simplified construction as compared with some known constructions of pipe coupling, and which can be operated reliably by a simple turning action of the cap to effect pipe engagement or pipe release as required.
  • FIG 3 is a view general similar to Figure 2, but showing a modified form of pipe coupling within the scope of the invention. Parts corresponding with those already described are designated by the same reference numerals.
  • each of the projections 24 is of uniform radial thickness i.e. is not provided with radially outwardly projecting cam portion 13a of the projections 13, and therefore the projections 24 are not deformed one way or the other by the guide surface 18 upon rotation of the cap 14.
  • the projections 24 lack the cam extension feature of the projections 13, and therefore function as "sleepers", they do have the purpose of preventing radial distortion of an inserted pipe, which might otherwise generate ovality under closure. This also obviates the need for the spacer washer 23, in that the projections 13 and 14 together can prevent extrusion of the sealing ring 21 under pressure.

Abstract

There is disclosed a pipe coupling (10) which comprises a socket for receiving an inserted pipe and having an axially inner internal socket portion (11) and axially spaced outlet socket portion (12), a resilient gripping portion located in the outer socket portion and arranged to be radially inwardly deformable so as to engage with and to prevent withdrawal of the inserted pipe from the socket, an encircling member (14) rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the gripping portion radially between pipe-release and pipe-engaging position respectively and with the encircling member being connected to the gripping portion to rotate the latter therewith, and a guide surface provided on the outer socket portion and engageable with the gripping portion in order to deform the latter resiliently to the pipe-engaging position upon rotation of the gripping portion by the encircling member (14) when the latter is rotated to its operative position.

Description

PIPE COUPLING
This invention relates to a pipe coupling having a socket for receiving an inserted pipe, and a gripping portion mounted in the socket and engageable with the outer periphery of the inserted pipe in order to prevent withdrawal of the pipe from the socket.
The invention has been developed primarily, though not exclusively, in connection with a pipe coupling for receiving a pipe which is intended to deliver a gaseous or liquid medium, in which case it is usually desirable for the pipe coupling to be capable of housing therein a sealing ring which can act between the socket and the outer periphery of the inserted pipe.
It is known to provide a pipe coupling of the above general type, in which the gripping portion takes the form of a gripping ring which is radially compressible. Radial compression is applied to the ring, in order to exert a gripping action on the outer periphery of the inserted pipe, by means of co-operating frusto-conical surfaces on the ring and inside the socket and/or inside a nut screwing onto the socket and having an inwardly directed flange for urging the gripping ring axially into the socket. The disadvantage of this known arrangement is that it is not possible to know and difficult to judge how much to tighten the nut to obtain a sufficient grip on the inserted pipe without risk of damage.
It is also known for the gripping ring to be a grab ring having deflectable teeth for effecting an automatic grip on a pipe inserted through it, but in addition to the disadvantages of not knowing whether the grip is adequate, whether it will be maintained, and if the inserted pipe has been damaged, it is necessary for the grab ring to be disposed axially farther into the socket than the sealing ring so that the latter can seal on a portion of the surface of the inserted pipe which is not scarred by the teeth of the grab ring. Furthermore, because the pipe cannot be inserted into the socket without the grip being effected automa ically, it is not possible to effect a trial of the coupling without then having to dismantle its constituent parts.
It is an object of the invention to provide a pipe coupling having a gripping portion which is readily capable of releasing itself from an inserted pipe, by a simple action and which can be reused satisfactorily.
According to the invention there is provided a pipe coupling comprising: a socket for receiving an inserted pipe and having an axially inner internal socket portion and an axially spaced outer socket portion; a resilient gripping portion located in the outer socket portion and arranged to be radially inwardly deformable so as to engage with and to prevent withdrawal of the inserted pipe from the socket; an encircling member rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the gripping portion radially between pipe-release and pipe engaging positions respectively, the encircling member being connected to said gripping portion to rotate the latter therewith: and a guide surface provided on said outer socket portion and engageable with said gripping portion in order to deform the latter resiliently to the pipe-engaging position upon rotation of the gripping portion by the encircling member when the latter is rotated to its operative position.
Thus, a pipe coupling according to the invention provides a simple but effective coupling for use with an inserted pipe, which can readily engage the inserted pipe via its gripping portion following a simple turning action applied to the encircling member and which can equally readily release the inserted pipe for withdrawal of the pipe from the socket of the coupling.
Preferably, a mounting is provided in the socket for receiving an annular seal, such an an 0-ring, to engage sealingly with the outer periphery of the inserted pipe. Conveniently, this mounting is provided adjacent to a shoulder forming a transition between the axially inner socket portion and the outer socket portion - which is usually of larger diameter than the inner socket portion so as to accommodate the gripping portion whereby the inner periphery of the later, when in the release position, is approximately in line with the inner surface of the inner socket portion.
The gripping portion may comprise two or more axially extending projections which are circumferentially spaced from each other about the inner wall of the outer socket portion, and preferably these projections are formed in one piece with the encircling member.
The guide surface provided on the outer socket portion may comprise a cam portion which preferably takes the form of a cam surface provided circumferential ly throughout the inner wall of the outer socket portion, whereby rotation of the gripping portion by the encircling member causes the projections thereof to move radially inwardly and outwardly according to the profile of the cam surface, to move between its pipe-release and its pipe-engaging positions.
The encircling member conveniently comprises a cap having an annular portion which overlies the outer socket portion and which has a co-operative radial flange and co¬ operating circumferential slot-type connection with the outer periphery of the socket, so as to be held captive axially while rotating between its operative and inoperative positions. This co-operative connection may comprise a radially extending circumferential flange provided on the outer periphery of the socket, located approximately radially in line with the transition between the inner socket portion and the outer socket portion, and an annular slot formed in the inner surface of the annular portion of the cap.
To hold the seal captive against said shoulder, preferably a spacer washer is received by the outer socket portion and is spaced between the seal and the axially inner ends of the projections of the gripping portion.
The projections of the gripping portion may be provided with teeth or other gripping type serrations on their radially inner surfaces for engagement with the outer periphery of an inserted pipe.
A pipe coupling according to the invention is preferably made from moulded plastics material, and is particularly suitable for use with inserted pipes also made of plastics material.
One embodiment of pipe coupling according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawing, in which:
Figure 1 is a longitudinal sectional view of the embodiment of pipe coupling;
Figure 2 is a sectional view taken in a radial plane perpendicular to the longitudinal axis of the pipe coupling shown in Figure 1; and.
Figure 3 is a view, similar to Figure 2, of a modification to the pipe coupling.
Referring now to Figures 1 and 2 of the drawings, an embodiment of pipe coupling according to the invention is designated generally by reference 10 and comprises a socket for receiving an inserted pipe (not shown) and having an axially inner internal socket portion 11 and an axially spaced outer socket portion 12. A resilient gripping portion is located in the outer socket portion 12 and comprises three axially extending projections 13 which are radially inwardly deformable so as to engage with the outer periphery of an inserted pipe and to prevent withdrawal of the inserted pipe from the socket.
An encircling member in the form of a cap 14 is rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the projections 13 of the gripping portion radially between pipe-release and pipe- engaging positions respectively. The encircling member 14 comprises an annular portion 15 which overlies the outer socket portion 12, and which has a co-operative radial flange and circumferential slot type connection with the outer periphery of the socket so as to be held captive axially while rotating between its operative and inoperative positions. In the illustrated embodiment, this co-operative connection comprises a radially outwardly extending flange 16 on the outer periphery of the socket, located substantially radially in line with the transition between the inner socket portion 11 and the outer socket portion 12, and an annular slot 17 formed in the inner wall of the annular portion 15 of the cap 14.
The cap 14 is connected to the projections 13 of the gripping portion so as to rotate the latter therewith, and in the illustrated embodiment this is provided by making the projections 13 in one piece with the moulding of the annular portion 15 of the cap 14. However, the connection of the projections 13 to the cap 14 need not be an integral connection, but any other direct or indirect connection.
To effect the necessary resilient radially inward deformation of the projections 13 to the pipe-engaging position, upon rotation of the cap 14, a guide surface in the form of a cam portion is provided on the outer socket portion 12 which makes suitable engagement with the radially outer cam surface portions 13a of the projections 13. In the illustrated embodiment, the cam portion takes the form of a cam profile surface 18 arranged along the inner wall of the outer socket portion 12 and which, as shown in Figure 2, has three radially outwardly extending recesses 19. each of which receives a respective one of the three projections 13 when the latter are in their pipe- release positions. Evidently, clockwise or anti-clockwise rotation of the cap 14 will then move the outer surfaces of the projections 13 into contact with intermediate portions 20 of the cam profile 18, and which form arcuate surfaces located radially inwardly of the inner surfaces of recesses 19, so as to effect resilient radially inward deformation of the projections 13 to the pipe-engaging position.
In order to seal the outer periphery of the inserted pipe, when gaseous or liquid media are to be conveyed thereby, a mounting is provided in the socket for receiving an annular seal in the form of an 0-ring 21 , which is located adjacent a shoulder 22 which forms a transition between the inner socket portion 11 and the outer socket portion 12. The outer socket portion 12 has a larger diameter than the inner portion 11, so as to accommodate the projections 13 of the gripping portion whereby the inner periphery of the latter, when in the release position, is approximately in line with the inner surface of the inner socket portion 11. To hold the 'seal 21 in position, a washer 23 is positioned in the outer socket portion 12 between the seal 21 and the axially inner ends of the projection 13.
To improve the gripping action of the projections 13, they may be provided on their inner surfaces with gripping teeth or serrations.
An alternative internal arrangement of the outer socket portion 12 and the radial projections 13 of Figures 1 and 2 may be provided (not shown) in which the cam feature is reversed, whereby a raised portion may be arranged on the inner wall of the outer socket portion, rather than on the radial projections. This will operate in the same way. but have the benefit of a slightly smaller pipe coupling.
The illustrated embodiment of pipe coupling is composed essentially of only two individual components, namely the socket forming the portions 11 and 12, and the cap forming both the operating member for the pipe coupling, and also the gripping portion engageable with the inserted pipe - via the projections 13, and these two components can be readily manufactured from plastics mouldings. This therefore provides a simplified construction as compared with some known constructions of pipe coupling, and which can be operated reliably by a simple turning action of the cap to effect pipe engagement or pipe release as required.
Referring now to Figure 3, this is a view general similar to Figure 2, but showing a modified form of pipe coupling within the scope of the invention. Parts corresponding with those already described are designated by the same reference numerals.
In the modification shown in Figure 3, additional axial projections 24 are provided, located one between each of the projections 13, and it will be noted that each of the projections 24 is of uniform radial thickness i.e. is not provided with radially outwardly projecting cam portion 13a of the projections 13, and therefore the projections 24 are not deformed one way or the other by the guide surface 18 upon rotation of the cap 14. However, while the projections 24 lack the cam extension feature of the projections 13, and therefore function as "sleepers", they do have the purpose of preventing radial distortion of an inserted pipe, which might otherwise generate ovality under closure. This also obviates the need for the spacer washer 23, in that the projections 13 and 14 together can prevent extrusion of the sealing ring 21 under pressure.

Claims

1. A pipe coupling comprising: a socket for receiving an inserted pipe and having an axially inner internal socket portion and axially spaced outer socket portion; a resilient gripping portion located in the outer socket portion and arranged to be radially inwardly deformable so as to engage with and to prevent withdrawal of the inserted pipe from the socket; an encircling member rotatably mounted on the socket for angular movement between an inoperative position and an operative position in order to effect movement of the gripping portion radially between a pipe-release and pipe- engaging positions respectively, the encircling member being connected to said gripping portion to rotate the latter therewith; andr a guide surface provided on the outer socket portion and engageable with said gripping portion in order to deform the latter resiliently to the pipe-engaging position upon rotation of the gripping portion by the encircling member when the latter is rotated o its operative position.
2. A pipe coupling according to Claim 1, in which a mounting is provided in the socket for receiving an annular seal to engage sealingly with the outer periphery of the inserted pipe.
3. A pipe coupling according to Claim 2, in which the mounting is provided adjacent to a shoulder forming a transition between the axially inner socket portion and the outer socket portion.
4. A pipe coupling according to any one of Claims 1 to 3, in which the gripping portion comprises two or more axially extending projections which are circumferentially spaced from each other about the inner wall of the outer socket portion and which are formed in one piece with the encircling member.
5. A pipe coupling according to any one of Claims 1 to 4, in which the guide surface comprises a cam portion in the form of a cam surface provided circumferentially throughout the inner wall of the outer socket portion, and arranged whereby rotation of the gripping portion by the encircling member causes the projections to move radially inwardly and outwardly according to the profile of the cam surface, to move between its pipe-release and pipe-engaging positions.
6. A pipe coupling according to any one of Claims 1 to 5, in which the encircling member comprises a cap having an annular portion which overlies the outer socket portion and has a co-operative radial flange and circumferential slot type connection with the outer periphery of the socket so as to be held captive axially while rotating between its operative and inoperative positions.
7. A pipe coupling according to Claim 6, in which the co-operative connection comprises a radially outwardly extending flange on the outer periphery of the socket, located approximately radially in line with the transition between the inner socket portion and the outer socket portion and an annular slot formed in the inner wall of the annular portion of the cap.
8. A pipe coupling according to Claim 3, in which a spacer washer is received by the outer socket portion and is spaced between the seal and the axially inner ends of the projections.
9. A pipe coupling according to any one of Claims 1 to 8. in which the projections of the gripping portion are provided with teeth or serrations on their radially inner surfaces for engagement with the outer periphery of an inserted pipe.
10. A pipe coupling according to Claim 4, in which the axially extending projections have radially outwardly projecting cam portions which are engageable with the guide surface so as to impart radial inward deformation to each of the projections.
11. A pipe coupling according to Claim 10, including further axial projections, located between said projections having said radially outwardly projecting cam portions, and which are unaffected by the guide surface but which serve to located the inserted pipe.
PCT/GB1990/000038 1989-01-11 1990-01-11 Pipe coupling WO1990008288A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898900572A GB8900572D0 (en) 1989-01-11 1989-01-11 Pipe coupling
GB8900572.2 1989-01-11

Publications (1)

Publication Number Publication Date
WO1990008288A1 true WO1990008288A1 (en) 1990-07-26

Family

ID=10649890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000038 WO1990008288A1 (en) 1989-01-11 1990-01-11 Pipe coupling

Country Status (3)

Country Link
AU (1) AU4957690A (en)
GB (1) GB8900572D0 (en)
WO (1) WO1990008288A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333912A (en) * 1992-09-18 1994-08-02 Railway Equipment Company, Inc. Track switch snow melter duct system with quick release joints
US5425558A (en) * 1993-08-17 1995-06-20 Handy & Harman Automotive Group, Inc. Quick-connect coupling
US5449208A (en) * 1993-11-29 1995-09-12 Railway Equipment Company, Inc. Track switch snow melter duct connection system
WO1998014729A1 (en) * 1996-10-01 1998-04-09 Royack Limited Pipe coupling device
GB2334562A (en) * 1998-02-20 1999-08-25 Eden Limited A connector
EP1655529A1 (en) * 2004-11-08 2006-05-10 Kulm Holding Ag Quick connector
US7455330B2 (en) 2005-04-28 2008-11-25 Kulm Holding Ag Quick coupling
EP2131089A1 (en) * 2008-05-28 2009-12-09 John Guest International Limited Improvements in or relating to tube couplings
US9261214B2 (en) 2010-06-22 2016-02-16 John Guest International Limited Tube coupling having an improved collet alignment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB956480A (en) * 1960-06-13 1964-04-29 Mission West Mfg Company Couplings, for example, for conduits
US3390898A (en) * 1965-03-22 1968-07-02 Kunio A. Sumida Quick release threaded coupling
GB1157600A (en) * 1968-02-27 1969-07-09 Smith & Davis Ltd Improvements in Connectors for Connecting Hose Pipes to Water Supply Taps or the like.
EP0200339A2 (en) * 1985-04-03 1986-11-05 Anthony Roy Robson Pipe couplings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB956480A (en) * 1960-06-13 1964-04-29 Mission West Mfg Company Couplings, for example, for conduits
US3390898A (en) * 1965-03-22 1968-07-02 Kunio A. Sumida Quick release threaded coupling
GB1157600A (en) * 1968-02-27 1969-07-09 Smith & Davis Ltd Improvements in Connectors for Connecting Hose Pipes to Water Supply Taps or the like.
EP0200339A2 (en) * 1985-04-03 1986-11-05 Anthony Roy Robson Pipe couplings

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333912A (en) * 1992-09-18 1994-08-02 Railway Equipment Company, Inc. Track switch snow melter duct system with quick release joints
US5425558A (en) * 1993-08-17 1995-06-20 Handy & Harman Automotive Group, Inc. Quick-connect coupling
US5449208A (en) * 1993-11-29 1995-09-12 Railway Equipment Company, Inc. Track switch snow melter duct connection system
US6179346B1 (en) 1996-10-01 2001-01-30 Royack Limited Pipe coupling device
WO1998014729A1 (en) * 1996-10-01 1998-04-09 Royack Limited Pipe coupling device
GB2334562B (en) * 1998-02-20 2003-04-23 Eden Ltd A connector
GB2334562A (en) * 1998-02-20 1999-08-25 Eden Limited A connector
EP1655529A1 (en) * 2004-11-08 2006-05-10 Kulm Holding Ag Quick connector
US7434846B2 (en) 2004-11-08 2008-10-14 Kulm Holding Ag Quick coupling
US7455330B2 (en) 2005-04-28 2008-11-25 Kulm Holding Ag Quick coupling
EP2131089A1 (en) * 2008-05-28 2009-12-09 John Guest International Limited Improvements in or relating to tube couplings
US8029024B2 (en) 2008-05-28 2011-10-04 John Guest International Limited Tube couplings
US9261214B2 (en) 2010-06-22 2016-02-16 John Guest International Limited Tube coupling having an improved collet alignment

Also Published As

Publication number Publication date
AU4957690A (en) 1990-08-13
GB8900572D0 (en) 1989-03-08

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