AU2001293966A1 - A device for gripping a pipe or bar - Google Patents
A device for gripping a pipe or barInfo
- Publication number
- AU2001293966A1 AU2001293966A1 AU2001293966A AU2001293966A AU2001293966A1 AU 2001293966 A1 AU2001293966 A1 AU 2001293966A1 AU 2001293966 A AU2001293966 A AU 2001293966A AU 2001293966 A AU2001293966 A AU 2001293966A AU 2001293966 A1 AU2001293966 A1 AU 2001293966A1
- Authority
- AU
- Australia
- Prior art keywords
- pipe
- bar
- external wall
- cage
- inserted pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Description
A DEVICE FOR GRIPPING A PIPE OR BAR
THIS INVENTION concerns a device for gripping the external wall surface
of a pipe or bar and particularly, though not exclusively, to a connector adapted to receive and
retain a pipe end for fluid connection to another pipe end or to a supply outlet.
Devices are known for gripping the external wall surface of a pipe, which
include a body having an internal tapered wall part, and a cage with balls or rollers cooperating
with the tapered wall part thus to move inwardly and grip the pipe wall to prevent its removal
from the device. In such devices the cage is spring-loaded in a direction to cause the balls or
rollers to grip the wall but in many such examples when fluid pressure is applied within the
device there is a tendency for the pipe to slip and move longitudinally by as much as 5mm or
more. This movement causes the balls or rollers to become partially embedded in the pipe wall,
which makes it difficult subsequently to remove the pipe from the device and it is often a
disadvantage that the external wall of the pipe is partially deformed or scored by the balls or rollers.
An object of the present invention is to provide a gripping device such as a pipe
connector wherein the aforementioned disadvantage is substantially avoided.
According to the present invention there is provided a device for gripping the
external wall surface of a pipe or bar, comprising a tubular body having at least one end open
for insertion of a pipe or bar, a cage within the tubular body with balls or rollers cooperating
with a first tapered internal wall part of the body, resilient means to push the cage in an axial
direction to cause the balls or rollers to grip the external wall surface of an inserted pipe or bar,
and a compressible member located within the body and cooperating with a second tapered
internal wall part of the body and movable relative thereto when increased fluid pressure is
present within the body thus also to grip the external wall surface of the inserted pipe or bar.
Preferably the compressible member has a contact surface adapted to make
substantially full circumferential contact with the external wall surface of the inserted pipe or bar.
The device may include a sealing ring adapted to form a seal between the
internal wall of the body and the external wall surface of the inserted pipe or bar.
The cage and the compressible member may have respective cooperating faces
for simultaneous axial movement within the body.
The compressible member may be a circumferentially split ferrule.
The body may comprise axially aligned separate body parts each threadedly
engageable with a co-axial spring retaining member housed within the body.
The body may contain an anti-extrusion ring axially aligned with the
circumferentially split ferrule, and a tapered ring located between the anti-extrusion ring and the
circumferentially split ferrule.
The body may include an annular shoulder against wh ich an end of the inserted
pipe or bar may be located.
An embodiment of the invention will now be described, by way of example
only, with reference to the accompanying drawing which is a cross-section through a pipe
connector made in accordance with the invention.
The connector comprises a first tubular body part 1 having a first tapered
internal wall part 11. Threadedly engaged within one end of the body part 1 is a spring retaining
member 3. An external thread of the retaining member 3 receives a second tubular body part 2.
A ball cage 8 is located co-axially within the body part 1 and includes an
outwardly directed circumferential flange 12 which, together with an inwardly directed flange
13 on the spring retaining member 3, retains a coil spring 10 whereby the cage 8 is pushed in an
axial direction to cause a number of ball bearings 9 to ride radially inwardly on the first tapered
internal wall part 11. The cage is retained within the body part 1 by engagement of the flange 12 with the wall part 11.
The flange 13 of the spring retaining member 3 has a tapered internal face 14
against which is located a corresponding tapered external face of a circumferentially split ferrule
4 located within the body part 2 co-axially therewith.
Abutting an end face 15 of the ferrule 4 axially remote from the cage 8 is a
metal ring 5 having a tapered face 16 against which is located a corresponding tapered face of
an anti-extrusion ring 6 preferably, though not exclusively, of PTFE.
Axially displaced from the anti-extrusion ring 6 is an 'O' ring 7 which in use
forms a pressure tight seal between the internal wall of the body part 2 and a pipe to be inserted
into the connector as will be described.
It can be seen that the body part 1, ball cage 8, spring retainer 3 and spring 10
may be pre-assembled, as can the body part 2, the 'O' ring 7, the rings 5 and 6 and the split ferrule 4, whereupon joining of the two body parts forms the final assembly.
The materials from which the parts of the device are constructed are typical of
such devices. For example, the body parts 1 and 2 may be of steel or brass; the spring-retainer
3 may be of steel; the ball bearings 9 may be of hardened steel, the split ferrule 4 may be of
hardened steel segments with elastomeric inserts, the 'O' ring 7 may be of natural or synthetic
rubber; and the ring 5 may be of brass.
Typically, a connecting device as described may be used in conjunction with
pipes of a diameter up to 50mm with internal pressures in the region of 3,000 to 6,000 psi, but
is typically tested to a pressure in excess of 20,000 psi.
The connector is used by inserting a pipe end in the direction of arrow 17
which causes the ball cage 8 to move against the spring 10 such that the ball bearings 9 ride along
the external wall of the inserted pipe. An annular shoulder 18 preferably, though not essentially,
forms an end stop for the pipe whereupon the pipe is retained by the pressure of spring 10 acting
to cause ball bearings 9 to form a grip upon the external wall of the inserted pipe but with
insufficient pressure to become embedded therein.
In the present example the body part 2 has an end portion 19 which may be
connected to another such connecting device or to a port for the transportation of pressurised
fluid.
When the fluid pressure increases within the body part 2 the 'O' ring 7 is
forced against rings 6 and 5, thus in turn causing the split ferrule 4 to ride inwardly on the
tapered internal face 14 of the spring retaining member 3 to be compressed thereby and firmly
to grip the external wall of the pipe substantially around the full circumference thereof. This
gripping action serves to prevent any tendency of the pipe, under pressure, to move in a direction
opposite to arrow 17 which would otherwise cause the ball bearings 9 to become embedded in
the pipe wall. In a typical conventional pipe connector having only a ball or roller cage, such
movement may be as great as 5mm in the axial direction whereas with the present arrangement
any such movement is expected to be negligible and certainly no greater than 1mm. This is of
considerable advantage when constructing, for example, hydraulic circuits.
Since the balls 9 are prevented from excessively gripping and thus deforming
the pipe wall, subsequent removal of the pipe from the connector is facilitated by introducing a
removal tool which pushes the cage 8 against the spring 10, and it will be seen that the cage 8
and split ferrule 4 have cooperating tapered end faces 20 and 21 respectively, such that the
removal tool causes the cage to abut the ferrule and move it in the direction of arrow 17 thus to
expand and release the pipe.
It will be appreciated that the circumferentially split ferrule 4 is clear of the
ipe during initial insertion and only grips the external wall thereof when compressed by the
tapered face 14 upon the application of an increased fluid pressure within the device.
A further advantage of the present device is that it is the internal fluid pressure
which provides the gripping action and no additional tools or the like are needed for tightening
the device, unlike some types of pipe connector where relative rotation of the parts is needed to
grip the pipe. The device is thus self-gripping with minimal linear slip of the pipe in use and
considerably reduced deformation or surface damage to the pipe wall in view of the substantially
full circumferential contact between the latter and the split ferrule.
In use, any further increase in internal fluid pressure serves only to cause the
split ferrule 4 to grip the pipe more firmly.
Although the ferrule 4 is illustrated as having an internal toothed gripping
surface, in some cases a smooth internal surface is sufficient.
Since the ball bearings do not excessively grip the pipe wall the connector is
re-usable with, perhaps, the split ferrule 4 being the only part requiring replacement in some
cases.
Although the foregoing description refers to the device as a pipe connector
nevertheless, with a different formation of body part 2 it may serve as a pipe or bar retaining
device, pressurised fluid being introduced into the body part 2 such as to force the 'O' ring 7 and
the rings 6 and 5 towards the split ferrule 4. The pressurised fluid may be introduced through
a port in the wall of the body part 2 or, in the case of a pressurised pipe, by way of an aperture
in the pipe wall.
Claims (9)
1. A device for gripping the external wall surface of a pipe or bar, comprising a tubular
body having at least one end open for insertion of a pipe or bar, a cage with balls or
rollers cooperating with a first tapered internal wall part of the body, resilient means to
push the cage in an axial direction to cause the balls or rollers to grip the external wall
of an inserted pipe or bar, and a compressible member located within the body and
cooperating with a second tapered internal wall part of the body and movable relative
thereto when increased fluid pressure is present within the body thus also to grip the
external wall of the inserted pipe or bar.
2. A device according to Claim 1 , wherein the compressible member has a contact surface
adapted to make substantially full circumferential contact with the external wall surface
of the inserted pipe or bar.
3. A device according to Claim 1 or Claim 2, including a sealing ring adapted to form a
seal between the internal wall of the body and the external wall surface of the inserted
pipe or bar.
4. A device according to any preceding claim, wherein the cage and the compressible
member have respective co-operating faces for simultaneous axial movement within the body.
5. A device according to any preceding claim, wherein the compressible member is a
circumferentially split ferrule.
6. A device according to Claim 5, wherein the circumferentially split ferrule comprises
hardened steel segments with elastomeric inserts.
7. A device according to any preceding claim, wherein the body comprises axially aligned
separate body parts each threadedly engageable with a co-axial spring retaining member
housed within the body.
8. A device according to Claim 5 or Claim 6, wherein the body contains an anti-extrusion
ring axially aligned with the circumferentially split ferrule, and a tapered ring located
between the anti-extrusion ring and the circumferentially split ferrule.
9. A device according to any preceding claim, wherein the body includes an annular
shoulder against which an end of the inserted pipe or bar may be located.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0024278.4 | 2000-10-04 | ||
GBGB0024278.4A GB0024278D0 (en) | 2000-10-04 | 2000-10-04 | A device for gripping a pipe or bar |
PCT/GB2001/004411 WO2002029301A1 (en) | 2000-10-04 | 2001-10-04 | A device for gripping a pipe or bar |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2001293966A1 true AU2001293966A1 (en) | 2002-06-27 |
AU2001293966B2 AU2001293966B2 (en) | 2006-08-31 |
Family
ID=9900652
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2001293966A Expired - Fee Related AU2001293966B2 (en) | 2000-10-04 | 2001-10-04 | A device for gripping a pipe or bar |
AU9396601A Pending AU9396601A (en) | 2000-10-04 | 2001-10-04 | A device for gripping a pipe or bar |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU9396601A Pending AU9396601A (en) | 2000-10-04 | 2001-10-04 | A device for gripping a pipe or bar |
Country Status (14)
Country | Link |
---|---|
US (1) | US6991265B2 (en) |
EP (1) | EP1322885B1 (en) |
JP (1) | JP2004510934A (en) |
AT (1) | ATE298406T1 (en) |
AU (2) | AU2001293966B2 (en) |
BR (1) | BR0114412A (en) |
CA (1) | CA2423679A1 (en) |
DE (1) | DE60111641T2 (en) |
DK (1) | DK1322885T3 (en) |
ES (1) | ES2242773T3 (en) |
GB (1) | GB0024278D0 (en) |
NO (1) | NO20031520L (en) |
PT (1) | PT1322885E (en) |
WO (1) | WO2002029301A1 (en) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0301895D0 (en) * | 2003-01-28 | 2003-02-26 | Bsw Ltd | A gripping tool |
US7284772B2 (en) * | 2003-12-19 | 2007-10-23 | Alder Randall F | Coupling assembly |
US7445050B2 (en) * | 2006-04-25 | 2008-11-04 | Canrig Drilling Technology Ltd. | Tubular running tool |
US7552764B2 (en) * | 2007-01-04 | 2009-06-30 | Nabors Global Holdings, Ltd. | Tubular handling device |
NO328491B1 (en) * | 2007-02-06 | 2010-03-01 | Raufoss Water & Gas As | coupling |
US8720541B2 (en) | 2008-06-26 | 2014-05-13 | Canrig Drilling Technology Ltd. | Tubular handling device and methods |
US8074711B2 (en) * | 2008-06-26 | 2011-12-13 | Canrig Drilling Technology Ltd. | Tubular handling device and methods |
NL2002303C2 (en) * | 2008-12-08 | 2010-06-10 | Henri Peteri Beheer Bv | PIPE CONSTRUCTION FOR A HOT WATER TAPER AND SUCH A TAP. |
US7986572B2 (en) * | 2009-08-17 | 2011-07-26 | Magic Technologies, Inc. | Magnetic memory capable of minimizing gate voltage stress in unselected memory cells |
US9052047B2 (en) * | 2010-06-03 | 2015-06-09 | Keith Covert | Quick connect coupler for glass container molding machine |
US20120001418A1 (en) * | 2010-07-02 | 2012-01-05 | Michel Garcin | Connector |
US9958100B2 (en) | 2010-10-15 | 2018-05-01 | Swagelok Company | Push to connect conduit fitting with ferrule |
US9273523B2 (en) | 2011-01-21 | 2016-03-01 | 2M-Tek, Inc. | Tubular running device and method |
US20130056976A1 (en) * | 2011-09-02 | 2013-03-07 | Sung-Hun Kim | One-touch pipe connection device |
GB201117049D0 (en) | 2011-10-04 | 2011-11-16 | Ecolok Ltd | Method and apparatus for gripping |
JP6651453B2 (en) * | 2013-10-24 | 2020-02-19 | スウエイジロク・カンパニー | Single acting push type connection pipe joint |
CA2890494C (en) * | 2014-05-02 | 2023-08-01 | Sigma Electric Manufacturing Corporation | Connectors and methods for making and using the same |
GB201415044D0 (en) * | 2014-08-26 | 2014-10-08 | Ftl Subsea Ltd | Clamp |
CN104455814B (en) * | 2014-11-14 | 2016-11-30 | 无锡乐华自动化科技有限公司 | A kind of dynamic swelling oil connection |
CN104534212B (en) * | 2014-12-22 | 2017-02-22 | 林圣博 | Locking type quick coupling |
US10458582B2 (en) | 2015-04-23 | 2019-10-29 | Swagelok Company | Single action push to connect conduit fitting with colleting |
ES2755400T3 (en) * | 2015-04-23 | 2020-04-22 | Swagelok Co | Push connector set for conduit connection |
US20170097036A1 (en) * | 2015-10-02 | 2017-04-06 | Graham-White Manufacturing Company | Telescoping assembly |
CN107606359A (en) * | 2017-10-27 | 2018-01-19 | 陈清龙 | A kind of pipe fitting plugs together the connector of self-locking |
CN113518879B (en) | 2019-04-01 | 2023-12-15 | 斯瓦戈洛克公司 | Push-to-connect catheter adapter assembly and apparatus |
CN113232877A (en) * | 2021-06-11 | 2021-08-10 | 江西洪都航空工业集团有限责任公司 | Nacelle quick-release suspension joint |
CN114321728B (en) * | 2021-11-25 | 2023-10-27 | 中铁大桥科学研究院有限公司 | Pump prying system and construction method thereof |
KR102439578B1 (en) * | 2022-03-16 | 2022-09-05 | 비오티 주식회사 | Coupler for piping |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1337288A (en) * | 1918-05-07 | 1920-04-20 | Strause Gas Iron Co | Gas-fixture and fuel-hose therefor |
US2503495A (en) | 1947-03-03 | 1950-04-11 | Frederick A Koester | Coupling |
NL81653C (en) * | 1949-04-14 | |||
US2702202A (en) * | 1950-06-23 | 1955-02-15 | Aeroquip Corp | Packed-socket pipe coupling with releasable pipe retaining means |
JPH03140696A (en) | 1989-10-26 | 1991-06-14 | Nippon Pisuko:Kk | Coupling |
US5284369A (en) | 1990-08-24 | 1994-02-08 | Tokai Rubber Industries, Ltd. | Quick connector |
US5653480A (en) | 1993-03-19 | 1997-08-05 | Bridgestone Flowtech Corporation | Pipe coupling |
US5593239A (en) | 1994-04-28 | 1997-01-14 | Tracor, Inc. | Extendable support pole |
US5445358A (en) | 1994-12-16 | 1995-08-29 | Parker-Hannifin Corporation | Exhaust type quick action coupler |
GB9506183D0 (en) * | 1995-03-27 | 1995-05-17 | Glynwed Plastics | Improvements in or relating to pipe couplings |
DE29704444U1 (en) * | 1997-03-12 | 1997-04-24 | Voswinkel Kg | Connection device for sanitary pipelines |
US5893391A (en) | 1997-07-11 | 1999-04-13 | Aeroquip Corporation | Coupling latch |
SE510689C2 (en) | 1997-10-23 | 1999-06-14 | Nyberg Bo Erik | Quick coupling, where both torsion and axial displacement are required for disassembly |
JP3319712B2 (en) | 1997-11-14 | 2002-09-03 | 日東工器株式会社 | Female parts of fittings |
-
2000
- 2000-10-04 GB GBGB0024278.4A patent/GB0024278D0/en not_active Ceased
-
2001
- 2001-10-04 AU AU2001293966A patent/AU2001293966B2/en not_active Expired - Fee Related
- 2001-10-04 CA CA002423679A patent/CA2423679A1/en not_active Abandoned
- 2001-10-04 PT PT01974451T patent/PT1322885E/en unknown
- 2001-10-04 DK DK01974451T patent/DK1322885T3/en active
- 2001-10-04 AT AT01974451T patent/ATE298406T1/en not_active IP Right Cessation
- 2001-10-04 JP JP2002532842A patent/JP2004510934A/en not_active Withdrawn
- 2001-10-04 ES ES01974451T patent/ES2242773T3/en not_active Expired - Lifetime
- 2001-10-04 EP EP01974451A patent/EP1322885B1/en not_active Expired - Lifetime
- 2001-10-04 WO PCT/GB2001/004411 patent/WO2002029301A1/en active IP Right Grant
- 2001-10-04 BR BR0114412-0A patent/BR0114412A/en not_active IP Right Cessation
- 2001-10-04 AU AU9396601A patent/AU9396601A/en active Pending
- 2001-10-04 DE DE60111641T patent/DE60111641T2/en not_active Expired - Fee Related
-
2003
- 2003-04-01 US US10/404,898 patent/US6991265B2/en not_active Expired - Fee Related
- 2003-04-03 NO NO20031520A patent/NO20031520L/en unknown
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