GB2312263A - A connector for a small diameter pipe - Google Patents

A connector for a small diameter pipe Download PDF

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Publication number
GB2312263A
GB2312263A GB9707817A GB9707817A GB2312263A GB 2312263 A GB2312263 A GB 2312263A GB 9707817 A GB9707817 A GB 9707817A GB 9707817 A GB9707817 A GB 9707817A GB 2312263 A GB2312263 A GB 2312263A
Authority
GB
United Kingdom
Prior art keywords
wall
sleeve member
connector
small diameter
diameter 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
Application number
GB9707817A
Other versions
GB2312263B (en
GB9707817D0 (en
Inventor
Kazumi Fukaya
Ekjl Watanabe
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.)
Usui Kokusai Sangyo Kaisha Ltd
Original Assignee
Usui Kokusai Sangyo Kaisha 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=14801930&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2312263(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Usui Kokusai Sangyo Kaisha Ltd filed Critical Usui Kokusai Sangyo Kaisha Ltd
Publication of GB9707817D0 publication Critical patent/GB9707817D0/en
Publication of GB2312263A publication Critical patent/GB2312263A/en
Application granted granted Critical
Publication of GB2312263B publication Critical patent/GB2312263B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16L37/098—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 flexible hooks
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered
    • F16L19/12—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered with additional sealing means
    • 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
    • F16L37/098—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 flexible hooks
    • F16L37/0985—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 flexible hooks the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part
    • F16L37/0987—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 flexible hooks the flexible hook extending radially inwardly from an outer part and engaging a bead, recess or the like on an inner part the flexible hook being progressively compressed by axial tensile loads acting on the coupling

Description

23122C3 A CONNECTOR FOR CONNECTING A SMALL DIAMETER PIPE This invention
relates to a co=ecto= having a relatively 5=11 Pipe di=ate= Or S:LZe, Of approzdmately 2a MM Or Smaller for co=acting Inetal pipes Cr hard resj tubes (1%erci=afte= t ref e==td to as pipes) to be laqd generally as a f eed-oil or f ced-air supply line f or automorive vehicles or various machines or appa=tuses.
Y CO=t4 Cnall. the COnnOctor of this kind has bee-st.-uctured for exle as shown in Fig. 1,9. That is, the CO=eCtOr (21) has a peripheral portion fo=ed with an engaging hole (25) having a. lateh-o= v;LU (21) fo=ed in an =as end periphery t2zereof. In the hole c portion of the lar-cli-support wall, a separate socket body (7.2) having a plurality of pawl walls (23) inwardly slanted at a front portLion with respect to a direction Of assembling the pc--ial wa.11 p=tion of the aidal. Cent---.al hole is b=ughrinto an engagement state at a shoulder (24) of a base portion ot the pawl walls. Mms, m arulular periphe=al wall (23') port!= on the rear end side of the socket body is 1=erted and fitted-in so that an projectúzig wall (PO') portion of a pipe (Pc) assembled inside is pressure-engaged by the pawl walls (23). Incidentally, (2i.,) is a projecting wall on a tip Lde of the connedtor (21) ovex Which a resiz tube is fitted for Connection. therewirll- laowevdw, in the conventional art like rj%lS, WhexL the socket body (22) is assled, the. annillar pe--iphe=al wall (23') portion formed by a should= (24) of the socket body. has to be crushed to be passed through the inside of the lat--h-support wall (2.l'), incurring troubleness during a3.se=bling operation. Also, in relation to the engagement of the shoulder portion (24) with an inside of the latchsupport wall (21'), ti:e socket body is obliged to have generally a large diameter, and the pawl wall is long in size and t2%:Ln in wall th.Lckn"3. As a result, the fazigue in the pawl wall pozt.,ons over a long te= causes loosening to induce devitation of the sockat bo&z i=--- a =tational direction. Parther, there involves surAi a problem thaz there is extreme d.,tflculty in rialeasi=g engagement, pressure.
The p=-es4=r. i=v=Z:Lcn has bee= =add in View of. the aforesaid problem involved by the conventionAl a=tt. and it is the object of the invention to provide a connector for connecting a small diameter p:Lpe wh%cb. is capable of eliminating the access-4ty of providingr and assembling a separate socket body as requ-,--ed by the prior art for release from troublQsonteness, providing e=jagement-pressure force to the claw wall portion with toughness and positiveness over a long te= without causing variation in position, and releasing the pipe from a connecting state in an extremely- easy operating manner by rotatIon or movement of the sleeve m er.
in order to achieve the above object, the present invention has a gist that c=prizes: a mAin bodY having a smaller diameter chamber and a larger diameter chamber penetratedly provided in an ax:Lal Interior thereof in a manner continuous with a flow passage hole formed in a coupling cylinder wall on a front side thereof; a resilient seal ring member and a bush member fitted in a smaller cer portion of the zain body; and a sleeve member movably attached over an outer side of a peripheral wall of Che =aller diameter chamber; wherein cutout window grooves provided at opposite locations on the peripheral wall on the larger cUamate= chamber side of the main body is integrally formed with a tongue-form resilient wall frontwardly projecting therefrom for inward urging to have an inwardly slanted bent portion as a claw wa.11 portion ar- a vicin-Sty of an IntermecUate portion thereof so that the claw wall portion of the tongue-to= resilient wall pressure-engages 3 with an annularly protruding wall portion Of a pipe to be connected cherewith; and wherein the sleeve member is provided with a protruding wall on an outer periphe-al side thereof such that it causes the resilient wall portion to expand and shrink by the movement of the sleeve member for achieving pres sureengagement and release therefrom at the claw wall portion.
Also. in the present Invention, it is ptefe_-red that, in a state of attaching the sleeve member, at least one of a rotational guide means andlor a positioning means is provided at attaching faces defined thexebetween. or, in the state of attaching the sleeve member, the rotational guide means andior a positioning meaw is formed by the inwardlybent wall provided at a tip of the resilient wall and an engaging flange wall provided outwardly projectingly on the sleeve member side, further or the protruding wall has an outer surface formed In an arcuate form or a pyraraid form. It is also preferred that a movement -preventive means is provided by screws to the sle-eve member having a tip thereof which at least is press-contacted by an outer peripheral surface of the main body.
Since the present invention is structured as above. when irlsert attaching the pipe during connection, the claw wall portion is expanded as the protruding wall portion abuts against the claw wall and thereafter the protruding 4 wall portion is brought into pres sure- engaged by elastic ret urn ing inward of the claw wall portion. When releasing the pipe, the rotation or forward sliding of the sleeve me causes the resilient wall portion to be expanded by the protruding wall with the result: of releasing the pressure- engagement of the claw wall portion. Therefore, there is no necessity of providing and assembling a separate socket body as required by the prior art thereby being released from troublesomeness. At the same time, the integral at.-ucture of the elastic wall having the claw wall portion with t:e main body provides pressure- engaging force to the pipe side with toughness and positiveness over- a long te= without causing deviation in positi=. Furthermore, the release of the pipe from the connectIng state is immediately made in an ext.-emely-casy operating manner by rotating or reaz-^rd moving the sleeve er.
Fig. 1 is a sectional view of a connector for connecting a smIl diameter pipe according to an embodizent of the present invention in a state of pipe ac=ect-on; rig. 2 is a rear view with respect to a connecting direction of Fig. 1; Fig. 3 is a partially brok an-away sectional view of Fig. 1 at an apprwd=tely 90 degree rotated position; Fig. 4 is an explanatory view with a partially broken-. away section of Fig. 1 in a state of releasing the pipe:
Fig. 5 is rear end view of Fig. 4 with respect to a connecting direction; Fig. 6 is a partially broken-away sectional view of the single main body of Fig. 1; Fig. 7 is a rear view of Fig. 6; rig. 9 is a partially broken-away sectional view of F19. 6 at a position of approxinately 90 degree rotated therefrom; rig. 9 is a perspective view of a sleeve ineniber of Fig.
Fig. 10 is a view of another embod-iment correspondUng to rig. 9; Fig. 11 is a view of the other embodinent corresponding to same Fig. 1; rig. 12 is a partially broken-away sectional view of Fig. 11 at a position of approximately 90 degree rotated therefx; rig. 13 is an explanatory view with a partially brokenaway section of Fig. 11 in a state of pipe release; Fig. 14 is a partially broken-away sectional view of a sleeve m= of Fig. 11; rig. 15 is a view of further another embodizent corresponding to same Fig. 1; Fig. 16 is a partially broken-away sectional view of Fig. 15 at a position of approximately 90 degree rotated therefrom; Fig. 17 is an wcpl=atory viav with a partially brokenaway section of Fig. 15 at a state of pipe release; Fig. 18 is a partially broken-away sectional view of a sleeve medber of Fig. 15; rig. 19 is a partially broken-away sectional view of a conventional connector for connecting a small diameter pipe in a state of pipe Connection.
Explain.ing embodiments of the preset invention based on rig. 1 to rig. 19, (1) is a main body of a connector fo=ed of. a nlmthet:Lc resin. which has an axial interior having a flow passage hole (4) formed in a coupling cylinder wall (2) formed projecting on a tip side for fitting with a resin tube (not shown), a smaller diameter chamber Q) and a large diameter chamber (3) formed continuous therawith at the rear thereof to penetrate therethrough- The smaller dlamater chamber has a resilient seal ring member (6) and a c.yli=l=ical bush mwa= (7) formed of a rubber material or a tesin material to be fitted therein. A cut-cut window groove (1) portion, Is provided at opposite locations on a periphe=al wall on the larger cliameter cham er (3). A 7 ton"e-fo=ed resilient wall (i.) for inward urging is integrally formed with the cut-out window groove portion such that it forwardly projecting to have a pawl wall (5) formed by a bent portion inwardly slanted. and outwardly cUrected at a vicinity of an inte=edlate portion thereof - Also, (8) is a sleeve member provided at a position on the outer side of a peripheral wall of the smaller d-J=eter cher (V) constituted by the main body (1) to be rotatably fitted in left and right cUrecti=s as shown in rig. 1. Alternatively, the sleeve membe= Is --F---bted slidable in forward and backward directions. Upon rotation or slide of the sleeve member, a projecting wall (V) provided on an outer side causes the opposing resilient wall (1) to expand and shrizLk. thereby exerting pressure and releasing same by pawl wall (5) portion on an annular e"anding wall (?') of pipe (p) to be connected.
Meanwhile, in a state of attaching the sleeve inember (a), it is possible as desi=ed to provide a rotation guide means (9) andlor a positioning means (10) that comprises a pair of a convex portion and a recess groove for engagement with each other at their fitting faces, as shown in Fig. 1 and rig. ii. Otherwise, these means (9, 10) may be farmed, as shown in rig. 15. by an inwardly-bent wall at a tip of the resilient wall (1-) and an outwardly-projecting engaging flange provided on a sleeve member (8) side so as to provide a smooth and positive rotation or sliding over the sleeve member (8). Also, the projecting wall (8') may be formed at its outer surface in an arcuate form as shown in Fig. 9, Fig. 14 and Fig. 18, or otherwise in a pyramid form as shown in Fig. 10.
In order to prevent the sleeve member (8) from rotating in the left and right directions relative to the main body (1) due to a certain cause such as carelessness or the like, or sliding in the forward and backward directions to releasing the engagement pressure acting between the pawl wall (5) portion and the annular projecting wall (P/), small screws or set bolts as a movement preventive means (11) may be screwed through the sleeve member so that their tips are pressure-abutted against the outer surface of the main body (1), or inserted through holes formed through the sleeve member (8) to be screw-fastened to the outer surface of the main body (1). Incidentally, other various means other than the above may be applied as a means for preventing the sleeve member (8) from rotating in the left and right directions relative to the main body (1) or sliding in the forward and backward directions.
As explained above, the connector for connecting a small diameter pipe according to the present invention has a structure that a claw wall (5) portion is provided in a tongue resilient wall (1) portion to be integrated with a main body (1) and the resilient wall is selectively expanded 9 and shrunk by the rotation or slide of a sleeve member (8) to exert engagement pressure and release therefrom at a claw wall (5) portion. Consequently, there is no necessity for providing and assembling a separate socket body to eliminate troublesomeness. At the same time, there is no fear of variation in position of the claw wall (5) portion occurring due to loosening of engagement-pressure on a pipe (P) over a long term, thereby providing a connection which is tough and positive. Furthermore, the release of the pipe (P) can immediately be carried out by rotation or sliding of the sleeve member (8) in an extremely simple manner, thus offering an extremely useful connector for connecting a small diameter pipe.

Claims (11)

1. A connector for connecting a small diameter pipe comprising: a main body having a smaller diameter chamber and a larger diameter chamber penetratedly provided in an axial interior thereof in a manner continuous with a flow passage hole formed in a coupling cylinder wall on a front side thereof; a resilient seal ring member and a bush member fitted in a smaller chamber portion of the main body; and a sleeve member movably attached over an outer side of a peripheral wall of the smaller diameter chamber; wherein cutout window grooves provided at opposite locations on the peripheral wall on the larger diameter chamber side of the main body are integrally formed with a tongueform resilient wall forwardly projecting therefrom for inward urging and having an inwardly slanted bent portion of a claw wall portion at a vicinity intermediate of the grooves and tongue-formed resilient wall so that, in use, the claw wall portion of the tongue-form resilient wall pressureengages with an annularly protruding wall portion of a pipe to be connected therewith; and wherein the sleeve member is provided with a protruding wall on an outer peripheral side thereof such that it causes the resilient wall to selectively shrink and expand by the movement of the sleeve member for achieving respective pre s sure -engagement and release therefrom at the claw wall 11 portion.
2. A connector for connecting a small diameter pipe according to claim 1, wherein the movement of the sleeve member is carried out by rotation around its longitudinal axis or sliding thereof along its longitudinal axis.
3. A connector for connecting a small diameter pipe according to claim 1 or claim 2 wherein, in a state of attaching the sleeve member, at least one of a rotational guide means and a positioning means is provided at attaching faces defined therebetween.
4. A connector for connecting a small diameter pipe according to claim 1, 2 or 3 wherein, in the state of attaching the sleeve member, at least one of a rotational guide means and a positioning means is formed by the inwardlybent wall provided at a tip of the resilient wall and an engaging flange wall provided and projecting outwardly on the sleeve member side.
5. A connector for connecting a small diameter pipe according to claim 1, 2 or 3 wherein, in the state of attaching the sleeve member, at least one of a rotational guide means and a positioning means is formed by a pair of a convex portion and a concave groove for engagement with each other.
12
6. A connector for connecting a small diameter pipe according to any preceding claim, wherein the protruding wall has an outer surface formed in an arcuate form or a pyramid form.
7. A connector for connecting a small diameter pipe according to any preceding claim, wherein a movement preventive means is provided by screws to the sleeve member having a tip thereof which at least is press-contacted by an outer peripheral surface of the main body.
8. A connector for connecting a small diameter pipe according to claim 7, wherein the movement-preventive means is a small screw or a set bolt screwed to the sleeve member.
9. A connector for connecting a small diameter pipe comprising: a main body having a smaller diameter chamber and a larger diameter chamber penetratedly provided in an axial interior thereof in a manner continuous with a flow passage hole formed in a coupling cylinder wall on a front side thereof; a resilient seal ring member and a bush member fitted in a smaller chamber portion of the main body; and a sleeve member movably attached over an outer side of a peripheral wall of the smaller diameter chamber; wherein cutout window grooves provided at opposite locations on the peripheral wall on the larger diameter 13 chamber side of the main body is integrally formed with a tongue-form resilient wall frontwardly projecting therefrom for inward urging to have an inwardly slanted bent portion as a claw wall portion at a vicinity of an intermediate portion thereof so that the claw wall portion of the tongue-form resilient wall pressureengages with an annularly protruding wall portion of a pipe to be connected therewith; and wherein the sleeve member is provided with a protruding wall on an outer peripheral side thereof such that it causes the resilient wall portion to expand and shrink by the movement of the sleeve member for achieving pressureengagement and release therefrom at the claw wall portion.
10. A connector for connecting a small diameter pipe according to claim 9, wherein the movement of the sleeve member is carried out by rotation thereof in right and left directions or slide thereof in forward and backward directions.
11. A connector for connecting a small diameter pipe substantially as hereinbef ore described with reference to the Figures.
14
GB9707817A 1996-04-18 1997-04-17 Connectors for connecting a small diameter pipe Expired - Lifetime GB2312263B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12106396A JP3524676B2 (en) 1996-04-18 1996-04-18 Connector for small diameter piping connection

Publications (3)

Publication Number Publication Date
GB9707817D0 GB9707817D0 (en) 1997-06-04
GB2312263A true GB2312263A (en) 1997-10-22
GB2312263B GB2312263B (en) 2000-03-29

Family

ID=14801930

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9707817A Expired - Lifetime GB2312263B (en) 1996-04-18 1997-04-17 Connectors for connecting a small diameter pipe

Country Status (4)

Country Link
JP (1) JP3524676B2 (en)
KR (1) KR100245776B1 (en)
DE (1) DE19715967C2 (en)
GB (1) GB2312263B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319577A (en) * 1996-11-20 1998-05-27 Usui Kokusai Sangyo Kk Connector for small diameter pipes
DE19652768A1 (en) * 1996-12-18 1998-07-02 Christopher Clark Internal combustion engine
US6279966B1 (en) * 1998-06-05 2001-08-28 Usui Kokusai Sangyo Kaisha Ltd Connector made of resin for connecting pipes of small diameter
CN103206587A (en) * 2012-01-16 2013-07-17 诺马德国有限责任公司 Coupling element and unlocking element for the coupling element

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4275229B2 (en) * 1998-12-04 2009-06-10 臼井国際産業株式会社 Connection structure for small diameter resin tubes used for connectors for small diameter pipe connections
JP2004218832A (en) 2002-12-26 2004-08-05 Usui Kokusai Sangyo Kaisha Ltd Piping coupling
DE202012002418U1 (en) * 2012-03-07 2013-06-10 Veritas Ag quick connector
DE102016123263A1 (en) * 2016-12-01 2018-06-07 Vinko Reberšek pipe connectors
RU2676169C1 (en) * 2018-02-16 2018-12-26 Винко РЕБЕРСЕК Pipe connector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174163A (en) * 1985-04-24 1986-10-29 Schmelzer Corp Quick-connect fluid fitting assembly
EP0206582A2 (en) * 1985-06-11 1986-12-30 Hozelock-ASL Limited Hose coupling

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5112084A (en) * 1989-02-07 1992-05-12 Usui Kokusai Sangyo Kaisha, Ltd. Connector for small-diameter piping
JP3031959B2 (en) * 1990-05-30 2000-04-10 臼井国際産業株式会社 Piping connection connector
US5284369A (en) * 1990-08-24 1994-02-08 Tokai Rubber Industries, Ltd. Quick connector
DE19515849B4 (en) * 1995-04-29 2006-07-06 Voss Automotive Gmbh Plug-in coupling for pressure medium lines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2174163A (en) * 1985-04-24 1986-10-29 Schmelzer Corp Quick-connect fluid fitting assembly
EP0206582A2 (en) * 1985-06-11 1986-12-30 Hozelock-ASL Limited Hose coupling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2319577A (en) * 1996-11-20 1998-05-27 Usui Kokusai Sangyo Kk Connector for small diameter pipes
GB2319577B (en) * 1996-11-20 2000-12-27 Usui Kokusai Sangyo Kk Connector for connecting pipe arrangements having small diameter
DE19652768A1 (en) * 1996-12-18 1998-07-02 Christopher Clark Internal combustion engine
US6279966B1 (en) * 1998-06-05 2001-08-28 Usui Kokusai Sangyo Kaisha Ltd Connector made of resin for connecting pipes of small diameter
CN103206587A (en) * 2012-01-16 2013-07-17 诺马德国有限责任公司 Coupling element and unlocking element for the coupling element
CN103206587B (en) * 2012-01-16 2016-01-20 诺马德国有限责任公司 Connecting element and the release element for connecting element

Also Published As

Publication number Publication date
JP3524676B2 (en) 2004-05-10
DE19715967C2 (en) 1999-03-04
GB2312263B (en) 2000-03-29
DE19715967A1 (en) 1997-11-13
KR100245776B1 (en) 2000-04-01
KR970070688A (en) 1997-11-07
GB9707817D0 (en) 1997-06-04
JPH09280451A (en) 1997-10-31

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