CN1164883C - Connection assembly for pipes - Google Patents
Connection assembly for pipes Download PDFInfo
- Publication number
- CN1164883C CN1164883C CNB021220794A CN02122079A CN1164883C CN 1164883 C CN1164883 C CN 1164883C CN B021220794 A CNB021220794 A CN B021220794A CN 02122079 A CN02122079 A CN 02122079A CN 1164883 C CN1164883 C CN 1164883C
- Authority
- CN
- China
- Prior art keywords
- cutting ferrule
- connection
- rake
- pipes
- forms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The present invention relates to a pipe material connecting assembly used for pipe material connection, which has the structure that the inside of a connecting assembly body of inserted pipe materials to be connected is orderly inserted into a first sealing ring, a third sealing ring and a reinforcing lining of a second sealing ring which is arranged on the circumference surface of the third sealing ring, and then a state for compressing a compression cushion ring and a fastening ring of the third sealing ring is inserted to carry out connection according to clamping sleeves, wherein the diameter of the clamping sleeves is formed by 2 to 8 clamping sleeves as a group, and the clamping sleeves form inclined parts and insertion slots. Smaller force, which is only used when pipe materials with small calibers (diameters) are connected by screw bolts, is easily used for connecting the pipe materials, and operation is simple; simultaneously, the connecting portion of the pipe material connecting assembly and the pipe materials is fully sealed by 3 stages. Therefore, although the pipe materials are under the pressure of high-pressure liquid flowing in the pipe, leakage effect can not occur at all.
Description
Technical field
The present invention relates to a kind of connection assembly for pipes that tubing connects that is used for, more specifically, relate to a kind ofly will insert the connection part body inboard that will connect tubing, insert the 1st seal ring and the 3rd seal ring successively, with and periphery be provided with after the reinforcement lining of the 2nd seal ring, with the compression washer of intervention compression the 3rd seal ring and the state of retaining ring, connecting 2 is one group cutting ferrule, the less strength of used degree when only passing through Bolt Connection with minor caliber pipe, the connection part that connects tubing easily, so it is easy and simple to handle, simultaneously, through 3 stages connection assembly for pipes and tubing attachment portion are sealed fully, even the connection assembly for pipes that under the pressure of pipe inner high voltage fluid, also can not leak fully.
Background technique
Generally, limit the tubing of length in order to standardize, according to the Len req overtime, must use the connection assembly for pipes that connects tubing, such connection assembly for pipes, necessary condition is the sealing fully that will keep the joint, does not leak keeping, and requires simultaneously that operator operate easily when setting operation.
In order to improve the easiness of desired this class sealability of connection part and operation, the applicant once proposed connection assembly for pipes and had applied for patent (application number 97-007399 number), and was authorized to.
This mandate connection assembly for pipes as depicted in figs. 1 and 2, be included in its front and back and form screw section 64,65, the connection part body 60 of the protuberance 69 that caves in that the front end of front side screw section 64 forms and form internal thread part 67 at inner periphery, the coupling nut 61 that forms rake 66 at the place ahead of internal thread part 67 inner periphery forms with the liner 70 that is inserted in the above-mentioned protuberance 69 that caves in, and the outer periphery of the front end of the above-mentioned protuberance 69 that caves in is arranged a plurality of protruding 68 more than at least 3 that form at regular intervals.
Existing as constituted above connection assembly for pipes, tubing 63 is inserted after the inboard of front side screw section 64 of connection part bodies 60, connect coupling nut 61 in above-mentioned screw section, just can connect the internal thread 67 of coupling nut 61 and the screw thread 64 of connection part body 60, make the projection 68 that forms on the front end of the protuberance 69 that caves in of connection part body 60 be close to the rake 66 of coupling nut 61 with contact condition, area of contact with 68 of the projectioies of the rake 66 that reduces coupling nut 61 and the protuberance 69 that caves in, the contact opposing diminishes thus, can connect coupling nut 61 with less connection power, and, powerful connection power takes place by the rake 66 that forms on the coupling nut 61, make the protuberance 69 that caves in of the rake 66 that is adjacent to coupling nut 61 crooked to the inside, around fastening tubing 63 complete, tubing 63 is securely fixed on the connection part body 60 thus.
Yet, this connection assembly for pipes, when connecting the little tubing 63 of diameter, can operate with little power according to the methods that projection 68 reduces the contact opposing, but be used for the big tubing construction operation scene of diameter of big flow facility, then the diameter of aforementioned tubes connection part body 60 and coupling nut 61 is all bigger, its operation itself is exertion force quite, effort very in the operation not only, and its connections is incomplete often, thereby existence fatal shortcoming such as leak.
Summary of the invention
The technical problem to be solved in the present invention is exactly the defective that will overcome above-mentioned prior art, a kind of connection assembly for pipes is provided, when this connection assembly for pipes is used for the heavy caliber pipe connection, should only just can implement with less strength, easy and simple to handle, and to guarantee good seal between tubing and the link, even in pipe, do not leak during mobile highly pressurised liquid yet.
Technical solution of the present invention is as follows:
1. one kind is used for the connection assembly for pipes that tubing connects, and comprises the connection part body, it is characterized in that comprising:
(1) this connection part body, the outstanding lock tab platform that forms of the inner peripheral surface of central authorities in it, an end outer circumferential face expansion of this connection part body forms lip part, and the inner peripheral surface of this end then is set as the end step;
(2) cutting ferrule that can coat this connection part body flange portion fully is made of two cutting ferrule sections, and the connection lug at the two end part, the outside of each cutting ferrule section is provided with the bolt connecting hole that can be screwed into screw; One side of this two cutting ferrules section forms insertion groove, and the opposite side inner peripheral surface is outstanding to be formed by what line part, rake and line part constituted and be connected boss;
(3) the end step of this connection part body is installed the 3rd seal ring;
(4) the locking boss of this connection part body is provided with the 1st seal ring;
(5) the 1st seal rings are strengthened lining outward in addition, and lip part is made in the end of this reinforcement lining, and outer circumferential face is provided with the two seals ring recess;
(6) be embedded with the 2nd seal ring in the seal groove of this reinforcement lining;
(7) can insert compression washer between connection part body and the cutting ferrule, its end outer circumferential face expansion forms lip part;
(8) one retaining rings, the both side ends of its outer circumferential face forms rake, and inner peripheral surface forms lug boss, and a side also is provided with joint-cutting;
One side-prominent formation of said cutting ferrule connects boss, and opposite side is provided with insertion groove, and the outer madial wall of this insertion groove is made of line part, rake and line part;
Rake on the said insertion groove should be corresponding with the rake of connection assembly for pipes body flange portion;
The connection boss of said cutting ferrule is provided with lug boss;
Said cutting ferrule can be made of 2 above cutting ferrule sections, for example 2,3,4,5,6,8 sections formations.
Description of drawings
Fig. 1 is the front view of prior art tubular union connection part body.
Fig. 2 is a prior art tubular union user mode sectional drawing.
Fig. 3 is tubular union embodiment's 1 an of the present invention perspective exploded view.
Fig. 4 is that tubular union embodiment's 1 of the present invention cutting ferrule links the forward part sectional drawing.
Fig. 5 is that tubular union embodiment's 1 of the present invention cutting ferrule is fully in conjunction with the rear section sectional drawing.
Fig. 6 is that user mode-cutting ferrule of tubular union embodiment 2 of the present invention is in conjunction with preceding fragmentary cross-sectional view.
Fig. 7 is the fragmentary cross-sectional view after the complete combination of user mode-cutting ferrule of tubular union embodiment 2 of the present invention.
Fig. 8 is the sectional drawing that the lip part of tubular union embodiment's 2 of the present invention connection part body is made rake.
Fig. 9 is the sectional drawing that the connection boss of tubular union embodiment's 2 of the present invention cutting ferrule is made lug boss.
Among the figure:
1-connection assembly for pipes 2-tubing
3-the 1st seal ring 4,4a-the 2nd seal ring
5-the 3rd seal ring 10-connection part body
11-lip part 12-locks boss
13-rake 14-end step
20-strengthens lining 21-lip part
22,22a- seal groove 30,30a-cutting ferrule section
31-insertion groove 32-rake
33-connects boss 33a-rake
33b, 33c-line part 34-lug boss
35-connects lug 36-bolt connecting hole
37-connecting bolt 38,39-line part
40-compression washer 41-lip part
50-retaining ring 51-rake
52-lug boss 53-joint-cutting
Embodiment
Please consult Fig. 3, Fig. 4 and Fig. 5 earlier, before the perspective exploded view, cutting ferrule that Fig. 3, Fig. 4 and Fig. 5 are respectively connection assembly for pipes embodiment 1 of the present invention links and cutting ferrule fully in conjunction with after fragmentary cross-sectional view.As seen from the figure, connection assembly for pipes of the present invention is made up of following part:
(1) the connection part body 10, the outstanding lock tab platform 12 that forms of the inner peripheral surface of central authorities in it, and an end outer circumferential face expansion of this connection part body 10 forms lip part 11, and the inner peripheral surface of this end then is set as end step 14;
(2) two cutting ferrule section 30,30a that can coat these connection part body 10 lip parts 11 fully, the connection lug 35 at its two end part, outside is provided with the bolt connecting hole 36 that can be screwed into connecting bolt 37; The side of this two cutting ferrules section 30,30a forms insertion groove 31, and the opposite side inner peripheral surface is outstanding to be formed by what line part 33b, rake 33a and line part 33c constituted and be connected boss 33;
(3) the end step of connection part body 10 is installed the 3rd seal ring 5;
(4) the locking boss 12 of connection part body 10 is provided with the 1st seal ring 3;
(5) the 1st seal rings 3 outer linings 20 of strengthening in addition, this end of strengthening lining 20 forms lip part 21, and outer circumferential face is provided with two seals ring recess 22,22a;
(6) be embedded with two the 2nd seal rings 4,4a in the seal groove 22 of this reinforcement lining 20, the 22a;
(7) can insert compression washer 40 between connection part body 10 and cutting ferrule section 30, the 30a, its end outer circumferential face expansion forms lip part 41;
(8) one retaining rings 50, the two side ends of its outer circumferential face is made rake 51, and inner peripheral surface forms lug boss 52, one sides and also is provided with joint-cutting 53.
The assembling process of connection assembly for pipes of the present invention is as follows:
On the end step 14 with above-mentioned connection part body 10 the 3rd seal ring 5 is set earlier, lining is with the 1st seal ring 3 on the connection part body 10 inboard locking boss 12 that form; On the seal groove 22 of the outer circumferential face of strengthening lining 20,22a, embed the 2nd seal ring 4,4a, and make the lip part 21 of end approaching with above-mentioned the 1st seal ring 3; After insertion is provided with, compression washer 40 and retaining ring 50 are enclosed within on the tubing 2 that will be connected in order, be inserted in again between connection part body 10 and the reinforcement lining 20, then, be inserted in separately at the lip part 11 of above-mentioned connection part body 10 insertion groove 31 two cutting ferrule sections 30,30a, the rake 51 that makes retaining ring 50 is near after connecting the rake 33a of boss 33 at cutting ferrule section 30,30a, the bolt connecting hole 36 usefulness connecting bolts 37 of the connection lug 35 that make cutting ferrule section 30,30a both sides are fastening, and assembling just is through with.
The Action Specification of the embodiment of the invention 1 is as follows:
Insert reinforcing line in the above-mentioned connection part body 10 and overlap the lip part 21 that 20 ends form, even being inserted in the end of the tubing 2 in the connection part body 10 tilts, the entire contact surface that insertion is arranged on the locking boss 12 of connection part body 10 and the 1st seal ring 3 applies uniform compressive force and prevents water leakage phenomenon, and at two the 2nd seal rings 4 that the outer circumferential face of strengthening lining 20 embeds, 4a at the inner peripheral surface of tubing 2 with strengthen being extruded between the outer circumferential face of lining 20 and form sealing securely, prevent that with this tubing 2 and surface of contact of lip part 21 from leaking.
Then, the insertion groove 31 of above-mentioned cutting ferrule section 30,30a inboard vertically is enclosed within the lip part 11 of connection part body 10, so the fixed-site that cutting ferrule section 30,30a combine with the lip part 11 of connection part body 10, initial installation also is easy to.
Above-mentioned cutting ferrule section 30, the connection boss 33 inboard rake 33a that form of 30a are with fastening cutting ferrule section 30, the fastening force of the connecting bolt 37 of 30a is divided into vertical stress component and horizontal component, so when exerting oneself with above-mentioned cutting ferrule section 30, when 30a passes inchmeal toward the true dip direction of rake 33a, because the vertical stress component that connecting bolt 37 forms, by cutting ferrule section 30, the inner side surface of 30a vertically compresses above-mentioned retaining ring 50, the jut 52 that the inner peripheral surface of retaining ring 50 forms is pricked at the outer circumferential face that inserts tubing 2, when firmly fixing tubing 2, above-mentioned horizontal component makes cutting ferrule section 30, the rake 51 that the rake 33a that forms on the connection boss 33 of 30a progressively makes near above-mentioned retaining ring 50 upper end portions, and the along continuous straight runs promotion, retaining ring 50 along continuous straight runs are moved.Because moving of above-mentioned retaining ring 50, the compression washer 40 adjacent with retaining ring 50 sides moved, this compression washer 40 will be inserted in the 3rd seal ring 5 along continuous straight runs compression of the end step 14 of connection part body 10, make that compressed the 3rd seal ring 5 seals securely between above-mentioned connection part body 10 and the tubing 2.
Above-mentioned connection part body 10 and tubing 2 even be given a shock or impact, owing to connect the effect of the fastening force of boss 33 rake 33a and line part 33b, 33c, make cutting ferrule section 30,30a be not easy to separate under the state that firmly links.
The embodiment 2 of connection assembly for pipes of the present invention is as Fig. 6, Fig. 7, Fig. 8 and shown in Figure 9.
Embodiments of the invention 2 are basic identical with embodiment 1 formation, part such as the Fig. 6 different with the foregoing description 1, shown in Figure 7, in above-mentioned cutting ferrule section 30, one of 30a forms side-prominently and connects boss 33, the insertion groove 31 that the inner side surface of opposite side is formed by rake 32 between line part 38 and line part 39, in above-mentioned connection part body 10 and cutting ferrule section 30, between the 30a, the outer periphery that is arranged on the end forms the compression washer 40 of lip part 41 and the distolateral formation rake 15 in the both sides of outer circumferential face, the jut 52 that inner peripheral surface is made, the retaining ring 50 that one side forms joint-cutting 53 constitutes.Above-mentioned cutting ferrule when tubing is under the bigbore situation, can be combined by 2 to 8 cutting ferrule sections according to the said cutting ferrule of the diameter of tubing, so that the installation of cutting ferrule.
The assembling process of embodiments of the invention 2 is identical with the foregoing description 1, omits at this, only the interactively of embodiments of the invention 2 is described as follows at this:
Shown in Fig. 6,7, the inner side surface of the insertion groove 31 that forms in above-mentioned cutting ferrule section 30,30a one side forms that line part 38 and opposite side form highlightedly is connected boss 33, the lip part 11 that is locked in connection part body 10 respectively comprehensively and the end of the press part 5a of the 3rd seal ring 5, the fixing position that combines with the lip part 11 of connection part body 10 of cutting ferrule section 30,30a, thereby make and be provided with for the first time easily.
In addition, above-mentioned cutting ferrule section 30, the insertion groove 31 inboard rakes 32 that form of 30a, with fastening cutting ferrule section 30, the connection power of the connecting bolt 37 of 30a, be separated into the power of vertical composition and the power of horizontal composition, therefore, with above-mentioned cutting ferrule section 30,30a, roughly the true dip direction by rake 32 moves, at this moment, the power of above-mentioned vertical composition, fastening along with connecting bolt 37, cutting ferrule section 30, the inner side surface of 30a is with above-mentioned retaining ring 50, compress with Vertical direction, make the jut 52 of the inner peripheral surface formation of retaining ring 50, be carved into outer circumferential face at the tubing 2 that is inserted into, when firmly fixing tubing 2 thus, the power of above-mentioned horizontal composition, make cutting ferrule section 30, the connection boss 33 of 30a is pushed above-mentioned retaining ring 50 to substantially horizontal, makes retaining ring 50 shift to substantially horizontal, along with moving of above-mentioned retaining ring 50, the compression washer 40 that is connected on retaining ring 50 sides is mutually shifted to substantially horizontal, and above-mentioned compression washer 40 compresses the 3rd seal ring 5 in the end step 14 that is inserted in connection part body 10 toward substantially horizontal, thus, the 3rd seal ring 5 by compression seals the attachment portion between above-mentioned connection part body 10 and the tubing 2 securely.
Also have, to another embodiment of the present invention the 2nd embodiment as shown in Figure 8, on the lip part 11 of above-mentioned connection part body 10, form and correspond to cutting ferrule section 30, the rake 13 of the rake 32 that forms on the insertion groove 31 of 30a, rake 32 is contacted with rake 13, be more prone to connect cutting ferrule section 30,30a, as shown in Figure 9, in above-mentioned cutting ferrule section 30, the connection boss 33 of 30a, jut 34 is set, thus when cutting ferrule section 30, after the complete combination of 30a, jut 34 is engraved in the outer side surface of tubing 2, makes cutting ferrule section 30, the bonding state of 30a and tubing 2 is more firm, improves sealing force simultaneously and then prevents the leakage of fluid.
As mentioned above, according to connection assembly for pipes of the present invention, it is the connection part body inboard that will connect tubing inserting, insert the 1st seal ring and the 3rd seal ring successively, with and outer circumferential face the reinforcement lining of the 2nd seal ring is set, get involved the compression washer that the 3rd seal ring that is inserted into is compressed and the state of retaining ring then, connecting 2 is one group cutting ferrule, thus, only the less power with the bolt combination degree connects heavy caliber pipe easily, make easy and simple to handlely, the attachment portion through between 3 complete sealed tube connection parts of stage and tubing simultaneously is even therefore also a bit effect of leakage that do not produce under the pressure of the highly pressurised liquid that flows in pipe.
Claims (5)
1. one kind is used for the connection assembly for pipes that tubing connects, and comprises connection part body (10), it is characterized in that comprising:
(1) this connection part body (10), the outstanding lock tab platform (12) that forms of the inner peripheral surface of central authorities in it, an end outer circumferential face expansion of this connection part body (10) forms lip part (11), and the inner peripheral surface of this end then is set as end step (14);
(2) can coat the cutting ferrule of this connection part body (10) lip part (11) fully, this cutting ferrule is made of two cutting ferrule sections (30,30a), and the connection lug (35) at the two end part, the outside of each cutting ferrule section is provided with the bolt connecting hole (36) that can be screwed into screw (37); One side of this two cutting ferrules section (30,30a) forms insertion groove (31), and the opposite side inner peripheral surface is outstanding to be formed and be connected boss (33) by line part (33b), rake (33a) and line part (33c) formation;
(3) the end step (14) of this connection part body (10) installing the 3rd seal ring (5);
(4) the locking boss (12) of this connection part body (10) is provided with the 1st seal ring (3);
(5) the 1st seal rings (3) are outer strengthens lining (20) in addition, and lip part (21) is made in the end of this reinforcement lining (20), and outer circumferential face is provided with two seals ring recess (22,22a);
(6) be embedded with the 2nd seal ring (4,4a) in the seal groove of this reinforcement lining (20) (22,22a);
(7) can insert compression washer (40) between connection part body (10) and the cutting ferrule section (30,30a), its end outer circumferential face expansion forms lip part (41);
(8) one retaining rings (50), the both side ends of its outer circumferential face forms rake (51), and inner peripheral surface forms lug boss (52), and a side also is provided with joint-cutting (53).
2. connection assembly for pipes according to claim 1, a side-prominent formation that it is characterized in that said cutting ferrule (30,30a) connects boss (33), and opposite side is provided with insertion groove (31), and the outer madial wall of this insertion groove (31) is made of line part (38), rake (32) and line part (39).
3. connection assembly for pipes according to claim 2 is characterized in that the rake (32) on the said insertion groove (31) should be corresponding with the rake (13) of connection assembly for pipes body (10) lip part (11).
4. according to claim 2 or 3 described connection assembly for pipes, it is characterized in that the connection boss (33) of said cutting ferrule section (30,30a) is provided with lug boss (34).
5. according to claim 1 or 2 or 3 described connection assembly for pipes, it is characterized in that said cutting ferrule is made of 2 above cutting ferrule sections.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20010053299 | 2001-08-31 | ||
| KR10-2001-0053299A KR100432655B1 (en) | 2001-08-31 | 2001-08-31 | Pipe coupling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1381686A CN1381686A (en) | 2002-11-27 |
| CN1164883C true CN1164883C (en) | 2004-09-01 |
Family
ID=19713798
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02237007U Expired - Fee Related CN2556452Y (en) | 2001-08-31 | 2002-06-03 | Tube connecting assembly |
| CNB021220794A Expired - Fee Related CN1164883C (en) | 2001-08-31 | 2002-06-03 | Connection assembly for pipes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02237007U Expired - Fee Related CN2556452Y (en) | 2001-08-31 | 2002-06-03 | Tube connecting assembly |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100432655B1 (en) |
| CN (2) | CN2556452Y (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040004243A (en) * | 2003-12-01 | 2004-01-13 | 박실상 | Connection structure of tightener for pipes connecting socket |
| CN103046004B (en) * | 2011-10-12 | 2015-05-13 | 上海永超真空镀铝有限公司 | Water leak-proof structure of evaporator water circulation system in vacuum aluminizing device |
| KR101165203B1 (en) | 2011-12-07 | 2012-07-16 | 디케이락 주식회사 | Tube connecter |
| CN103939686B (en) * | 2014-04-04 | 2015-12-09 | 陈瑾 | A kind of Pipe joint assembly and a kind of haulage device |
| CN106237468B (en) * | 2016-08-29 | 2018-09-07 | 湖北益健堂科技股份有限公司 | Laser oxygen therapy terminal |
| US9777873B1 (en) * | 2016-11-02 | 2017-10-03 | Quick Fitting, Inc. | Side locking conduit device and joint assembly |
| CA3072268A1 (en) * | 2017-10-12 | 2019-04-18 | Georg Fischer Harvel Llc | Pipe coupling assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10281368A (en) * | 1997-03-31 | 1998-10-23 | Zexel Corp | Piping connection structure |
| KR100324470B1 (en) * | 1999-08-17 | 2002-02-27 | 조홍구 | Pipe connector |
| KR200220160Y1 (en) * | 2000-11-24 | 2001-04-16 | 홍승학 | pipe connect |
| KR100408930B1 (en) * | 2001-04-13 | 2003-12-11 | 김태승 | joint for connecting a flexible pipe |
| KR200254102Y1 (en) * | 2001-08-09 | 2001-11-23 | 박실상 | Closed pipe connecting device |
-
2001
- 2001-08-31 KR KR10-2001-0053299A patent/KR100432655B1/en not_active IP Right Cessation
-
2002
- 2002-06-03 CN CN02237007U patent/CN2556452Y/en not_active Expired - Fee Related
- 2002-06-03 CN CNB021220794A patent/CN1164883C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN2556452Y (en) | 2003-06-18 |
| KR100432655B1 (en) | 2004-05-22 |
| CN1381686A (en) | 2002-11-27 |
| KR20010088988A (en) | 2001-09-29 |
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