KR100485948B1 - The combination structure of agriculture water connection material and resin pipe - Google Patents
The combination structure of agriculture water connection material and resin pipe Download PDFInfo
- Publication number
- KR100485948B1 KR100485948B1 KR10-2002-0047999A KR20020047999A KR100485948B1 KR 100485948 B1 KR100485948 B1 KR 100485948B1 KR 20020047999 A KR20020047999 A KR 20020047999A KR 100485948 B1 KR100485948 B1 KR 100485948B1
- Authority
- KR
- South Korea
- Prior art keywords
- tightening
- connecting member
- chuck
- resin pipe
- screw
- 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
Links
- 239000011347 resin Substances 0.000 title claims abstract description 44
- 229920005989 resin Polymers 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 15
- 239000000463 material Substances 0.000 title abstract description 9
- 230000008878 coupling Effects 0.000 abstract description 12
- 238000010168 coupling process Methods 0.000 abstract description 12
- 238000005859 coupling reaction Methods 0.000 abstract description 12
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
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- 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
- F16L19/06—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 in which radial clamping is obtained by wedging action on non-deformed pipe ends
- F16L19/061—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 in which radial clamping is obtained by wedging action on non-deformed pipe ends a pressure ring being arranged between the clamping ring and the threaded member or the connecting member
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
본 발명은 농업용수 연결부재와 수지재 파이프의 결합구조에 관한 것이며 연결부재 선단벽면에 조임척을 구비하여 조임나사를 조일때 조임척의 압축 범위를 크게 하여 결합력을 견고히 하는 결합구조를 제공함에 목적이 있다.The present invention relates to a coupling structure between the agricultural water connection member and the resin material pipe and has a purpose of providing a coupling structure that has a tightening chuck on the distal end wall of the connecting member to increase the compression range of the tightening chuck when tightening the tightening screw to secure the coupling force. have.
이와 같은 본 발명은 연결부재의 나선이 구비되는 선단벽면에 가이드홈을 구비하고, 내측에는 조임척을, 외측에는 경사면을, 후방으로는 가이드돌편을 구비하는 한쌍의 조임척을 연결부재 선단에 결합하고 조임나사를 연결부재의 나선에서 조이면 조임척이 하강되도록 구성한 것이다.The present invention is provided with a guide groove on the tip wall surface is provided with a spiral of the connecting member, a pair of tightening chuck having a tightening chuck on the inner side, an inclined surface on the outside, a guide stone piece in the rear is coupled to the tip of the connecting member And tightening the tightening screw from the spiral of the connecting member is configured to lower the tightening chuck.
이와 같은 본 발명은 연결부재 선단에 한쌍의 조임척을 끼우고 조임나사로 결합하여서 구성되므로 제조가 용이하고 사용시에는 수지재 파이프를 조임나사의 중공부에 끼우고 조임나사를 조이게 되면 조임나사의 내면 경사부가 조임척을 하강시켜 수지재 파이프를 압지시키게 되며 견고한 결합이 이루어지게 되므로 사용이 편리한 특징이 있다. The present invention is configured by inserting a pair of tightening chuck on the end of the connecting member and combined with a tightening screw, so it is easy to manufacture, and when used, the resin pipe is inserted into the hollow part of the tightening screw and the tightening screw is inclined to the inner surface of the tightening screw. By lowering the additional tightening chuck to press the resin pipe and a solid coupling is made there is a convenient feature.
Description
본 발명은 농업용수연결부재와 수지재 파이프의 결합구조에 관한 것이며 보다 구체적으로는 고압펌프에서 송수되는 고압의 용수를 수지재 파이프를 이용하여 비닐하우스로 공급할때 수지재 파이프에는 수평연결부재, L형 연결부재, T형 분기부재, +형 연결부재 또는 밸브등의 각종 연결부재와 연결하게 되고, 이때 연결지점의 결합을 간단히 하고 견고히 한 것이다.종래에는 고압펌프에서 송수되는 고압의 용수는 수지재 파이프를 통하여 용수가 이송되고 수지재 파이프에는 수개의 밸브와 연결부재 및 각종 분기관등의 연결부재로 연결하여 비닐하우스의 분수노즐이나 과수등의 스프링클러에서 분사가 이루어지게 하여 사용 된다. The present invention relates to a coupling structure between the agricultural water connection member and the resin pipe, and more specifically, when supplying high pressure water from the high pressure pump to the plastic house using the resin pipe, the resin pipe has a horizontal connection member, L It is connected with various connecting members such as type connecting member, T type branching member, + type connecting member or valve, and at this time, the connection point is simplified and secured. In the past, the high pressure water from the high pressure pump is made of resin Water is transferred through the pipe, and the resin pipe is connected to several valves, connecting members, and various branching pipes, and used to spray from sprinklers such as fountain nozzles and fruit trees of the vinyl house.
이와 같이 고압펌프에서 송수되는 고압의 용수를 이송하는 수지재 파이프에는 밸브 또는 각종 분기관등 연결부재와의 연결수단은 수지재 파이프를 연결부재의 접속부에 끼우고 접속지점에 오링을 끼워 밀봉나사를 결합하여 연결하게 되나 수지재 파이프는 온도변화에 따라 신축범위가 커서 고압에서는 누수가 잦은 결점으로 널리 실용화되지 못하고 있고, 또 연결부재의 내경에는 단턱을 구비하여 패킹을 수납하고 내면에는 수개의 돌턱이 구비되고 경사부를 갖는 홀더를 위치시켜 연결부재 외면의 나사에 경사부를 갖는 너트로 결합하고 수지재 파이프를 연결부재의 홀더 내측으로 끼우고 너트로 조이게 되면 너트가 연결부재의 외면 나사에 체결되어 전진되면서 너트의 내면 경사부가 홀더의 외면 경사부에 위치되어 홀더 내면의 돌턱을 수지재 파이프 외면을 압지시킬 수 있고, 동 수단은 연결부재에 수지재 파이프를 끼워 조이게 되면 연결되므로 연결수단이 간단한 특징은 있으나 너트가 홀더를 협착시켜 수지재 파이프 외면을 고정할 때 홀더 내경을 협착하는 수축범위에 한계성을 갖게 되므로 수지재 파이프의 외경에 변화가 발생되는 동절기에는 수지재 파이프의 외경이 축소되면서 홀더의 수축범위가 적어 견고한 밀봉력이 유지되지 못하는 폐단이 있다. In this way, the resin pipe for transporting the high-pressure water from the high-pressure pump is connected to the connection member such as a valve or various branch pipes by inserting the resin pipe into the connection part of the connection member and inserting an O-ring at the connection point to provide a sealing screw. Resin pipes are connected to each other, but the resin pipe has a large stretch range due to temperature change, and thus it is not widely used as a drawback at frequent leaks at high pressures. When the holder having the inclined portion is positioned and coupled to the screw on the outer surface of the connecting member with the nut having the inclined portion, and the resin pipe is inserted into the holder of the connecting member and tightened with the nut, the nut is fastened to the outer screw of the connecting member and advanced. The inner slant of the nut is located on the outer slant of the holder, so that It is possible to squeeze the outer surface of the frame, and the connecting means is connected when the resin pipe is tightened to the connecting member. Therefore, the connecting means is simple. However, the nut narrows the holder inner diameter when the nut clamps the holder to fix the outer surface of the resin pipe. In winter, when the outer diameter of the resin pipe is changed because the outer diameter of the resin pipe is reduced, there is a closed end in which the sealing range of the holder is small, so that the sealing force is not maintained.
이에 본 발명은 종래의 제반결점을 해소하고 연결부재의 선단벽면에 조임척을 구성하여 조임척의 압착범위를 크게하여 조임력을 향상하고, 결합과 분리를 간단히 하고, 제조를 용이하게 하여 연결부재에 수지재 파이프를 끼워 조임나사로 조이면 조임척이 수지재 파이프를 압지시켜 결합하고 조임나사를 풀게되면 수지재 파이프의 압지력이 해제되어 연결부재에서 수지재 파이프가 분리될 수 있도록 하는 농업용수 연결부재와 수지재파이프의 결합구조를 제공함에 목적이 있다.Accordingly, the present invention solves the conventional defects and constitutes a tightening chuck on the front end wall of the connecting member to increase the compression range of the tightening chuck to improve the tightening force, simplify the coupling and separation, and facilitate the manufacture of the resin to the connecting member When the pipe is inserted and tightened with a tightening screw, the tightening chuck presses the resin pipe together and combines it. When the screw is loosened, the clamping force of the resin pipe is released to allow the resin pipe to be separated from the connecting member. It is an object to provide a coupling structure of the repipe.
본 발명을 보인 도1은 분해사시도 도2는 종단면도 도3은 실시상태의 종단면도 도4는 농업용수 연결부재에 조임척을 결합한 우측면도를 보인 것이다.본 발명은 농업용수의 이송에 사용되는 수지재 파이프에서 수지재 파이프간을 연결하여 주는 ㅡ형, L형의 접속관과 수지재 파이프의 용수를 분기하는 T형 및 +형 분기관과 용수의 개폐에 사용되는 개폐밸브등 각종 형태의 연결부재와 수지재 파이프간의 결합을 공고히 하는 수단으로 도1 내지 도3에서와 같이 연결부재(1)의 나선부(2)가 구비된 선단벽면에 가이드홈(10)을 구비하고, 동 가이드홈(10)에는 내면에는 조임돌기(20)를, 외면에는 경사면(21)을, 후부 벽면에는 가이드돌편(22)을 구비한 한쌍의 조임척(3)(3a)을 끼우고, 연결부재(1)의 나선부(2)에는 후방의 내면경사부(4b)가 조임척(3)(3a)의 경사면(21)에 위치되는 조임나사(4)로 결합한 구성이다.Figure 1 shows an exploded perspective view of the present invention Figure 2 is a longitudinal cross-sectional view Figure 3 is a longitudinal cross-sectional view of the embodiment Figure 4 is a right side view of the fastening chuck coupled to the agricultural water connection member. The present invention is used for the transfer of agricultural water Various types of connecting members such as T-type and L-type connecting pipes that connect the resin pipes to the resin pipes, and T- and + -type branch pipes that divert the water from the resin pipes, and opening / closing valves used to open and close the water. As a means for solidifying the coupling between the resin pipe and the resin pipe as shown in Figures 1 to 3 is provided with a guide groove (10) on the front end wall provided with the spiral portion 2 of the connecting member (1), the guide groove (10) ), A pair of tightening chucks (3) (3a) having a fastening protrusion (20) on the inner surface, an inclined surface (21) on the outer surface, and a guide protrusion (22) on the rear wall, and the connecting member (1) On the spiral portion 2, a rear inner inclined portion 4b is attached to the inclined surface 21 of the tightening chuck 3 and 3a. Combination with the tightening screw (4) is located.
도면 중 미설명부호 30은 밀봉부시, 40은 수지재 파이프를 표시한 것이다.In the drawings, reference numeral 30 denotes a sealing bush and 40 denotes a resin pipe.
이와 같이 구성된 본발명의 작용효과를 설명하면 다음과 같다.Referring to the effects of the present invention configured as described above are as follows.
도1과 같이 통상의 연결부재(1)에 밀봉부시(30)를 끼우고 선단 벽면의 가이드홈(10)에는 조임척(3)(3a) 후방의 가이드돌편(22)을 끼워 결합하고, 조임나사(4)를 연결부재(1)의 나선부(2)에 결합하여 사용하게 되다.이와 같이 연결부재(1)의 일방에 결합수단을 구비한 연결부재(1)를 이용하여 수지재 파이프(40)를 연결하고자 할 때에는 도2와 같이 조임척(3)(3a)의 경사면(21)이 조임나사(4)의 내면경사부(4b)에 닿지 않도록 연결부재(1)의 나선부(2)에 체결된 조임나사(4)를 풀어서 후퇴시킨 다음 수지재 파이프(40)를 조임나사(4)의 중공부를 통하여 연결부재(1)에 끼우면 수지재 파이프(40)의 외면으로는 밀봉부시(30)와 조임척(3)(3a)이 위치되면서 끼워지게 된다.As shown in Fig. 1, the sealing bush 30 is inserted into the conventional connecting member 1, and the guide protrusions 22 behind the tightening chucks 3 and 3a are fitted into the guide grooves 10 of the distal end wall. The screw 4 is coupled to the helix portion 2 of the connecting member 1 to be used. As described above, the resin material pipe (using the connecting member 1 having the coupling means on one side of the connecting member 1) is used. 40, when connecting the inclined surface 21 of the tightening chuck (3) (3a) as shown in Figure 2 so that the threaded portion (2) of the connecting member (1) so as not to contact the internal inclined portion (4b) of the tightening screw (4) Loosen the tightening screw (4) fastened to the back) and then insert the resin pipe (40) to the connecting member (1) through the hollow portion of the tightening screw (4) to the outer surface of the resin pipe (40) sealing bush ( 30 and the tightening chuck (3) (3a) is positioned to be fitted.
이와 같이 연결부재(1)와 조임나사(4)의 중공부에 수지재 파이프(40)를 끼운다음 조임나사(4)를 조이게 되면 조임나사(4)가 조여지면서 연결부재(1)로 전진하면서 조임나사(4)의 내면경사부(4b)가 조임척(3)(3a)의 경사면(21)을 압지하게 되고, 조임척(3)(3a)은 연결부재(1) 선단의 가이드홈(10)을 타고 중심으로 하강하게 되면서 조임척(3)(3a) 내면의 조임돌기(20)가 수지재 파이프(40)의 원주면이 압지되면서 결합이 이루어지게 된다.As such, when the resin pipe 40 is inserted into the hollow portion of the connecting member 1 and the tightening screw 4, and then the tightening screw 4 is tightened, the tightening screw 4 is tightened and moved forward to the connecting member 1. The internal inclined portion 4b of the tightening screw 4 presses the inclined surface 21 of the tightening chuck 3 and 3a, and the tightening chuck 3 and 3a are guide grooves at the tip of the connecting member 1. 10) while descending to the center of the tightening chuck (3) (3a) the tightening projection 20 is the coupling is made as the circumferential surface of the resin pipe 40 is pressed.
한편, 조임척(3)(3a)의 내측에 위치하는 밀봉부시(30)는, 수지재파이프(40)에 고압의 용수가 유입되면 수압에 의해 밀봉부시(30)의 외측돌기는 연결부재(1)의 내벽에서, 내측돌기는 수지재 파이프(40)의 외면에서 각 밀착이 이루어져 긴밀한 밀봉이 이루어지게 된다.On the other hand, when the high pressure water flows into the resin material pipe 40, the sealing bush 30 located inside the tightening chucks 3 and 3a is connected to the outer projection of the sealing bush 30 by water pressure. In the inner wall of 1), the inner protrusions are in close contact with each other on the outer surface of the resin pipe 40 to form a tight seal.
이와 같은 본 발명은 조임나사(4)를 연결부재(1)의 나선(2)에서 조이면 조임나사(4)의 내면 경사부(4b)가 조임척(3)(3a)을 연결부재(1)의 가이드홈(10)에서 중심으로 하강시키고 수지재파이프(40)의 외면을 조임척(3)(3a)이 압지하게 되고, 압지하는 범위가 수지재파이프(40)의 수축범위 보다는 크게 되어 견고한 결합력을 갖게 되므로서 계절에 구애 없이 사용할 수있게 되고 고압용수를 이송하는 수지재파이프(40)에 연결부재(1)의 결합수단으로 사용이 편리하게 된다.In the present invention as described above, when the tightening screw 4 is tightened at the helix 2 of the connecting member 1, the inclined portion 4b of the tightening screw 4 connects the tightening chuck 3 and 3a to the connecting member 1. The guide groove 10 is lowered to the center and the outer surface of the resin material pipe 40 is tightened chuck (3) (3a) is pressed, the pressure holding range is greater than the shrinkage range of the resin material pipe 40 is firm Since the bonding force can be used regardless of the season, it is convenient to use as a coupling means of the connecting member (1) to the resin material pipe (40) for transporting high pressure water.
또 본 발명은 연결부재(1)와 수지재파이프(40)를 분리할때에는 조임나사(4)를 풀게 되면 조임나사(4)가 후퇴되면서 조임척(3)(3a)의 압지력은 해제되고 수지재파이프(40)와 조임척(3)(3a) 간에는 유격이 형성되므로 수지재파이프(40)를 간편하게 분리할 수 있게 된다.In addition, in the present invention, when the connecting member 1 and the resin pipe 40 are separated, when the tightening screw 4 is released, the clamping force of the tightening chuck 3 and 3a is released while the tightening screw 4 is retracted. Since a clearance is formed between the resin material pipe 40 and the tightening chucks 3 and 3a, the resin material pipe 40 can be easily separated.
위와 같은 본 발명은 구조가 간단하여 제조가 용이하고 연결부재와 수지재파이프의 결합이 용이하며 견고한 밀봉력을 갖게 되므로 사용이 편리하게 되는 것이다. The present invention as described above is easy to use because the structure is simple and easy to manufacture, the coupling member and the resin pipe is easy to combine and has a strong sealing force.
따라서 이상과 같은 본 발명은 연결부재의 선단벽면에 상하승강되는 한쌍의 조임척을 끼우고 조임나사를 조이면 조임척이 중심으로 하강하여 협착되게 구성하므로서 구조가 간단하여 ㅡ형,L형, T형,+형의 연결부재와 밸브등 각종 연결부재의 선단에 구비하여 수지재파이프와 연결하는 연결수단으로 널리 이용할 수 있게 되고, 조임범위(압착범위)가 커서 조임력이 향상되어 널리 이용할 수 있게 되는 매우 유용한 발명이다.Therefore, the present invention as described above, by inserting a pair of tightening chuck to be elevated up and down on the front end wall of the connecting member and tightening the tightening screw, the tightening chuck is lowered to the center and configured to be narrowed by the structure ㅡ -type, L-type, T-type, It can be widely used as a connecting means for connecting with resin pipes by being provided at the tip of various connecting members such as + type connecting members and valves, and the tightening range (compression range) is large, so that the tightening force can be widely used. Invention.
도1은 본 발명의 분해사시도1 is an exploded perspective view of the present invention
도2는 본 발명의 종단면도Figure 2 is a longitudinal cross-sectional view of the present invention
도3은 본 발명의 실시종단면도Figure 3 is a longitudinal cross-sectional view of the embodiment of the present invention
도4는 본 발명에서 농업용수 연결부재에 조임척을 결합한 우측면도Figure 4 is a right side view of the fastening chuck coupled to the agricultural water connection member in the present invention
※ 도면의 주요부분에 대한 부호 설명※ Explanation of Signs of Major Parts of Drawings
1 : 연결부재 2,4a : 나선부1: connecting member 2,4a: spiral part
3,3a : 조임척 4 : 조임나사3,3a: Tightening chuck 4: Tightening screw
4b : 내면경사부 10 : 가이드홈4b: internal inclined portion 10: guide groove
20 : 조임돌기 21 : 경사면20: tightening projection 21: inclined surface
22 : 가이드돌편22: guide stone
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0047999A KR100485948B1 (en) | 2002-08-14 | 2002-08-14 | The combination structure of agriculture water connection material and resin pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0047999A KR100485948B1 (en) | 2002-08-14 | 2002-08-14 | The combination structure of agriculture water connection material and resin pipe |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2020020024274U Division KR200295050Y1 (en) | 2002-08-14 | 2002-08-14 | The combination structure of agriculture water connection material and resin pipe |
Publications (2)
| Publication Number | Publication Date |
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| KR20020071503A KR20020071503A (en) | 2002-09-12 |
| KR100485948B1 true KR100485948B1 (en) | 2005-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2002-0047999A Expired - Fee Related KR100485948B1 (en) | 2002-08-14 | 2002-08-14 | The combination structure of agriculture water connection material and resin pipe |
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| KR101121448B1 (en) * | 2009-08-20 | 2012-03-16 | (주) 스위텍 | Pipe assembly used for prevention of breeding and extermination |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05272679A (en) * | 1992-01-22 | 1993-10-19 | Hitachi Metals Ltd | Pipe coupling |
| KR20000009281U (en) * | 1998-10-28 | 2000-05-25 | 박실조 | Pipe connection |
| KR20000009360U (en) * | 1998-11-03 | 2000-06-05 | 오승일 | Connection structure of plumbing pipe |
| US6179346B1 (en) * | 1996-10-01 | 2001-01-30 | Royack Limited | Pipe coupling device |
| KR200231636Y1 (en) * | 2001-03-08 | 2001-07-19 | 손현철 | Pipe coupler |
| KR20010072707A (en) * | 1998-08-24 | 2001-07-31 | 마우렌 노리온 크레바노브 | Pipe coupling |
-
2002
- 2002-08-14 KR KR10-2002-0047999A patent/KR100485948B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05272679A (en) * | 1992-01-22 | 1993-10-19 | Hitachi Metals Ltd | Pipe coupling |
| US6179346B1 (en) * | 1996-10-01 | 2001-01-30 | Royack Limited | Pipe coupling device |
| KR20010072707A (en) * | 1998-08-24 | 2001-07-31 | 마우렌 노리온 크레바노브 | Pipe coupling |
| KR20000009281U (en) * | 1998-10-28 | 2000-05-25 | 박실조 | Pipe connection |
| KR20000009360U (en) * | 1998-11-03 | 2000-06-05 | 오승일 | Connection structure of plumbing pipe |
| KR200231636Y1 (en) * | 2001-03-08 | 2001-07-19 | 손현철 | Pipe coupler |
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| KR20020071503A (en) | 2002-09-12 |
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