GB2301158A - Tube coupling with releasable tube gripping collet - Google Patents

Tube coupling with releasable tube gripping collet Download PDF

Info

Publication number
GB2301158A
GB2301158A GB9510745A GB9510745A GB2301158A GB 2301158 A GB2301158 A GB 2301158A GB 9510745 A GB9510745 A GB 9510745A GB 9510745 A GB9510745 A GB 9510745A GB 2301158 A GB2301158 A GB 2301158A
Authority
GB
United Kingdom
Prior art keywords
tube
collet
throughway
head
coupling body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9510745A
Other versions
GB2301158B (en
GB9510745D0 (en
Inventor
John Derek Guest
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9510745A priority Critical patent/GB2301158B/en
Publication of GB9510745D0 publication Critical patent/GB9510745D0/en
Publication of GB2301158A publication Critical patent/GB2301158A/en
Application granted granted Critical
Publication of GB2301158B publication Critical patent/GB2301158B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0925—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with rings which bite into the wall of the pipe
    • 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
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0927—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector the wedge element being axially displaceable for releasing the coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The coupling comprises a hollow body (10) having a throughway (11) to receive a tube and a collet (19) located in the throughway comprising an annular element (20) having integral resilient fingers (21) projecting into the throughway to engage an inserted tube. The throughway tapers (18) towards the open end to press the resilient fingers into gripping engagement with the tube with movement of the collet out of the throughway and release the tube with movement into the throughway. The collet extends outside the throughway with an out-turned encircling head (24) overlying an end of the coupling body for manipulating the collet. A T-section circlip (25) with a head (26) bridging the coupling body and collet head and a leg (27) engaging between the head and end of the coupling body prevents the head of the collet being pressed towards the end of the coupling body to release the tube.

Description

IMPROVEMENTS IN OR RELATING TO TUBE COUPLINGS This invention relates to tube couplings in which an end of a tube is engaged and gripped automatically by insertion in the coupling.
The invention provides a tube coupling and comprising a hollow body having a throughway open at one end to receive a tube, a collet located in the open ended throughway comprising an annular element having integral resilient fingers projecting into the throughway to engage a tube extending through the collet into the throughway, the throughway tapering towards said open end to press the resilient fingers into gripping engagement with the tube with movement of the collet out of the throughway and release the tube with movement into the throughway, the annular part of the collet extending outside the throughway and having an out turned encircling head which overlies an end of the coupling body for manipulating the collet and a T-section circlip the head of which bridges the coupling body and collet head and the leg of which engages between the leg and end of the coupling body to prevent the head of the collet being pressed towards the end of the coupling body to release the tube.
Preferably, the tube coupling body has an encircling recess adjacent said end of the coupling body to receive one flank of the cross-member of the T, the other flank encircling the collet head.
The following is a description of a specific embodiment of the invention, reference being made to the accompanying drawings in which: Figure 1 is a sectional view through a tube coupling body having a collet to receive and grip a tube in the body, the lower part of the figure showing part of a circlip for controlling release of the collet; Figure 2 is an elevation view of the circlip of Figure 1; and Figure 3 is a sectional view through the circlip on the line 3,3 on Figure 2.
Referring firstly to Figure 1 of the drawings, there is shown a tube coupling body indicated at 10 having a throughway 11 to receive and grip a tube, the outer periphery of which is indicated by the broken outline 12 in the coupling body. One end 13 of the coupling body has a reduced diameter opening 14 encircled by a bevelled entry or mouth 15. The throughway 11 has an enlarged diameter portion 16 spaced from the end 13 in which a seal 17 is located to seal with the outer surface of the tube 12.
Towards the end 13, the throughway is tapered to provide an inclined cam surface 18 which merges with the opening 14 into the throughway.
A collet indicated generally at 19 is mounted in the open end of the throughway comprising an annular part 20 from which a number of resilient fingers 21 project into the throughway. The fingers are formed with enlarged heads 22 which engage the paper cam surface 18 and which embody metal teeth 23 which project from the inner sides of the heads at an angle to bear against and grip a tube 12 located in the throughway.
Outside the throughway, the annular part of the collet is formed with an outturn encircling head 24 to facilitate manipulation of the collets. When a tube 12 is inserted into the coupling body through the collet, the surface of the tube is gripped by the metal teeth 23 of the resilient fingers of the collet and the collet is pushed inwardly with respect to the coupling body. When the tube is moved in a direction to withdraw from the coupling body, the collet is drawn with the tube and the engagement of the heads 22 of the collet with the tapered cam surface 18 forces the fingers into gripping engagement with the tube to restrain the tube against extraction from the throughway.When it is desired to release a tube, the head 24 of the collet is pressed inwardly of the coupling body thus moving the collet heads 22 beyond the cam surface 18 to release their gripping engagement with the tube. The tube can then be extracted from the coupling body.
To prevent inadvertent release of a tube from the coupling body, a T section circlip indicated generally at 25 is engaged between the head 24 of the collet and the end 13 of the coupling body as shown in the lower part of Figure 1. The circlip comprises a cross-piece 26 and a central leg 27. One flank of the cross-piece encircles the head 24 of the collet and the other flank engages in a recess 28 encircling the outer face of the coupling body adjacent the end face 13. The leg 27 of the circlip engages between the end 13 of the coupling body and the head 24 thus preventing the head 24 from being pushed against the end of the coupling body to release the gripping engagement of the collet with the tube as described earlier.
The T-section circlip is shown in elevation in Figure 2 and a cross-section through the circlip is shown in Figure 3.

Claims (3)

CLAIMS:
1. A tube coupling comprising a hollow body having a throughway open at one end to receive a tube, a collet located in the open ended throughway comprising an annular element having integral resilient fingers projecting into the throughway to engage a tube extending through the collet into the throughway, the throughway tapering towards said open end to press the resilient fingers into gripping engagement with the tube with movement of the collet out of the throughway and release the tube with movement into the throughway, the annular part of the collet extending outside the throughway and having an out turned encircling head which overlies an end of the coupling body for manipulating the collet and a T-section circlip the head of which bridges the coupling body and collet head and the leg of which engages between the leg and end of the coupling body to prevent the head of the collet being pressed towards the end of the coupling body to release the tube.
2. A tube coupling as claimed in claim 1, wherein the tube coupling body has an encircling recess adjacent said end of the coupling body to receive one flank of the cross-member of the T, the other flank encircling the collet head.
3. A tube coupling substantially as described with reference to and as illustrated in the accompanying drawings.
GB9510745A 1995-05-26 1995-05-26 Improvements in or relating to tube couplings Expired - Fee Related GB2301158B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9510745A GB2301158B (en) 1995-05-26 1995-05-26 Improvements in or relating to tube couplings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9510745A GB2301158B (en) 1995-05-26 1995-05-26 Improvements in or relating to tube couplings

Publications (3)

Publication Number Publication Date
GB9510745D0 GB9510745D0 (en) 1995-07-19
GB2301158A true GB2301158A (en) 1996-11-27
GB2301158B GB2301158B (en) 1998-09-02

Family

ID=10775126

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9510745A Expired - Fee Related GB2301158B (en) 1995-05-26 1995-05-26 Improvements in or relating to tube couplings

Country Status (1)

Country Link
GB (1) GB2301158B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325718A (en) * 1997-05-27 1998-12-02 Hepworth Building Prod Grab ring and socket incorporating a grab ring
US6065779A (en) * 1997-08-13 2000-05-23 Parker-Hannifin Corporation Clip for releasable push-to-connect tube fittings
GB2362401A (en) * 2000-05-19 2001-11-21 Fmc Corp Tubing hanger landing string with blowout preventer operated release mechanism
EP1245297A1 (en) * 2001-03-27 2002-10-02 I.M.P.A. F.LLI Togno S.r.l. Fast mounting nozzle for high pressure fluids, in particular for use in saunas, shower cabins and similar equipment
US6604760B2 (en) * 2001-06-29 2003-08-12 Parker-Hannifin Corporation Quick connect/disconnect coupling
EP1433992A1 (en) * 2002-12-17 2004-06-30 Polypipe Building Products Ltd. Pipe coupling
FR2923888A1 (en) 2007-11-15 2009-05-22 Legris Sa Tube connecting device for bore of rigid element i.e. body, of e.g. distributor, has bush that is in form of open ring closed by spear and housing, where ring has portion providing less tensile strength
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
GB2575620A (en) * 2018-04-27 2020-01-22 John Guest International Ltd A collet for locking a tube in a coupling body
EP3767148A1 (en) * 2019-07-18 2021-01-20 AVS Römer GmbH & Co. KG Connecting element for a hose

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558844A1 (en) * 1992-03-06 1993-09-08 Parker Hannifin Corporation Plastics push-in tube fitting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558844A1 (en) * 1992-03-06 1993-09-08 Parker Hannifin Corporation Plastics push-in tube fitting

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325718B (en) * 1997-05-27 2002-07-31 Hepworth Building Prod Grab ring and socket incorporating a grab ring
WO1998054504A1 (en) * 1997-05-27 1998-12-03 Hepworth Building Products Limited Grab ring and socket incorporating a grab ring
GB2325718A (en) * 1997-05-27 1998-12-02 Hepworth Building Prod Grab ring and socket incorporating a grab ring
US6065779A (en) * 1997-08-13 2000-05-23 Parker-Hannifin Corporation Clip for releasable push-to-connect tube fittings
GB2362401B (en) * 2000-05-19 2003-11-19 Fmc Corp Tubing hanger landing string with blowout preventer operated release mechanism
US6474412B2 (en) 2000-05-19 2002-11-05 Fmc Technologies, Inc. Tubing hanger landing string with blowout preventer operated release mechanism
GB2362401A (en) * 2000-05-19 2001-11-21 Fmc Corp Tubing hanger landing string with blowout preventer operated release mechanism
EP1245297A1 (en) * 2001-03-27 2002-10-02 I.M.P.A. F.LLI Togno S.r.l. Fast mounting nozzle for high pressure fluids, in particular for use in saunas, shower cabins and similar equipment
US6604760B2 (en) * 2001-06-29 2003-08-12 Parker-Hannifin Corporation Quick connect/disconnect coupling
EP1433992A1 (en) * 2002-12-17 2004-06-30 Polypipe Building Products Ltd. Pipe coupling
FR2923888A1 (en) 2007-11-15 2009-05-22 Legris Sa Tube connecting device for bore of rigid element i.e. body, of e.g. distributor, has bush that is in form of open ring closed by spear and housing, where ring has portion providing less tensile strength
EP2131089A1 (en) * 2008-05-28 2009-12-09 John Guest International Limited Improvements in or relating to tube couplings
EP2224157A1 (en) * 2008-05-28 2010-09-01 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
GB2575620A (en) * 2018-04-27 2020-01-22 John Guest International Ltd A collet for locking a tube in a coupling body
EP3767148A1 (en) * 2019-07-18 2021-01-20 AVS Römer GmbH & Co. KG Connecting element for a hose

Also Published As

Publication number Publication date
GB2301158B (en) 1998-09-02
GB9510745D0 (en) 1995-07-19

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050526

732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)