KR100358577B1 - Polyethylene spiral double-wall tube - Google Patents

Polyethylene spiral double-wall tube Download PDF

Info

Publication number
KR100358577B1
KR100358577B1 KR1019960007152A KR19960007152A KR100358577B1 KR 100358577 B1 KR100358577 B1 KR 100358577B1 KR 1019960007152 A KR1019960007152 A KR 1019960007152A KR 19960007152 A KR19960007152 A KR 19960007152A KR 100358577 B1 KR100358577 B1 KR 100358577B1
Authority
KR
South Korea
Prior art keywords
inner space
cement mortar
wall tube
spiral
space
Prior art date
Application number
KR1019960007152A
Other languages
Korean (ko)
Other versions
KR970066240A (en
Inventor
민병이
Original Assignee
주식회사 장원기술단
(주)해인코퍼레이션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 장원기술단, (주)해인코퍼레이션 filed Critical 주식회사 장원기술단
Priority to KR1019960007152A priority Critical patent/KR100358577B1/en
Publication of KR970066240A publication Critical patent/KR970066240A/en
Application granted granted Critical
Publication of KR100358577B1 publication Critical patent/KR100358577B1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/16Rigid pipes wound from sheets or strips, with or without reinforcement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56Winding and joining, e.g. winding spirally
    • B29C53/58Winding and joining, e.g. winding spirally helically
    • B29C53/581Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
    • B29C53/582Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material comprising reinforcements, e.g. wires, threads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00Rigid pipes
    • F16L9/18Double-walled pipes; Multi-channel pipes or pipe assemblies

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PURPOSE: A polyethylene spiral double-wall tube is provided to reinforce external pressure and hardness by making the inner space between inner and outer faces penetrated longitudinally and circumferentially and by packing cement mortar to an inlet port formed on a side of the outer face. CONSTITUTION: In a polyethylene spiral double-wall tube, an inner face(4) and an outer face(9) are formed, with maintaining an inner space. The outer face is bent up at regular intervals and is integrated to the inner face, to uneven grooves(2) and contact points(3), to form the inner space. An inlet port is formed to the outer face. Cement mortar is packed in the inner space. Thus, external pressure and hardness are reinforced.

Description

피이 나선 이중벽관Blood spiral double wall pipe

본 발명은 종래의 지하 매설시켜 배수로관용으로 사용되는 피이 나선관을 개량시켜 내측면과 외측면 사이에 나선권회 방향으로 간헐적으로 요흠구와 접합점으로 일체화시켜 내측면과 외측면 사이의 공간이 길이 방향 및 원주방향으로 관통시켜 주는 피이 나선관의 제품에 관한 것이다The present invention improves the conventional spiral pipe used for drainage pipes by embedding the underground underground, thereby intergrated in the spiral winding direction intermittently between the inner surface and the outer surface into the recesses and junctions so that the space between the inner surface and the outer surface is longitudinal and It relates to a product of blood spiral tubes penetrating in the circumferential direction

일반적으로 PE 나선관은 내측면이 평활하고 외측면의 핏치 보강부에서 중공구가 형성되어 나선 권회상태로 되어 있어서 배수로관으로 사용되어 왔으나 이의 용도다양화를 위하거나 보온관 또는 외압보강을 위하여 시멘트몰탈로 중공구의 내측공간에 충진시켜 보강하였으나 피이 나선관에서 핏치부에 나선권회 방향으로 형성된 보강 중공구의 양측벽면 때문에 피이 나선관의 내부공간이 길이방향으로 서로 관통되지 못하여 시멘트몰탈의 압축강도 저하의 요인이 되어 왔으며 또 단열관을 위하여 보온제 충만에도 효율성 및 작업성 등에 문제를 제기하는 현실이다In general, PE spiral pipes have been used as drainage pipes because the inner side is smooth and the hollow spheres are formed in the pitch reinforcement on the outer side and are in the spiral winding state, but for the purpose of diversification of the pipes or for thermal insulation or external pressure reinforcement The internal spaces of the helical pipes cannot penetrate each other in the longitudinal direction due to the lateral wall of the reinforcing hollow balls formed in the helical winding direction of the pitched spiral pipe. It has been a factor, and it is a reality that raises problems such as efficiency and workability even when the insulation is filled for the insulation pipe.

본 발명은 상기 지적한 PE 나선관에서 내측면과 외측면 사이의 내측공간이 길이방향 및 원주방향으로 관통되어서 외측면의 일측에 형성된 투입구로 시멘트 몰탈을 투입시켜 충진하여 외토압 및 견고성 강도 보강을 위하여 지중 매설하여 사용하는 경우 시멘트 몰탈이 길이방향 및 원주방향으로 일체로 충진되도록 구성하여주도록 구성된 제품제공을 위한 것이다The present invention in the above pointed PE spiral tube through the inner space between the inner surface and the outer surface in the longitudinal direction and the circumferential direction through the cement mortar by filling the inlet formed on one side of the outer surface to reinforce the external pressure and strength strength When used underground buried to provide a product configured to be configured so that the cement mortar is integrally filled in the longitudinal direction and circumferential direction

도1은 본 발명에서 내측면에 외측면을 간헐적으로 절곡시켜 요홈구와 접합점을 보인 부분 사시도1 is a partial perspective view showing the groove and the junction by intermittently bending the outer surface on the inner surface in the present invention

도2는 도1에서 요홈구와 접합점으로 내측공간을 보인 부분 확대단면도Figure 2 is a partially enlarged cross-sectional view showing the inner space to the junction and the recess in Figure 1

도3은 도1에서 장요홈구와 장접합점을 보인 일부 절개된 부분 확대된 사시도Figure 3 is an enlarged perspective view of a partially cut away showing the jangyo groove and intestinal junction in Figure 1

도4는 도1에서 내측면과 외측면 사이의 내측공간에 요홈구와 접합점을 보인 원주방향의 단면도Figure 4 is a sectional view in the circumferential direction showing the groove and the junction in the inner space between the inner surface and the outer surface in Figure 1

도5는 도1에서 외측면에 길이방향으로 절개된 투입구를 보인 부분 사시도Figure 5 is a partial perspective view showing the inlet cut in the longitudinal direction on the outer surface in Figure 1

도6은 도1에서 외측면에서 길이방향으로 간헐적으로 투입구를 보인 부분 사시도FIG. 6 is a partial perspective view of the inlet intermittently in the longitudinal direction from the outer surface in FIG.

도7은 도1에서 내측공간에 시멘트 몰탈이 충진된 구조를 보인 부분 확대 단면도7 is a partially enlarged cross-sectional view showing a structure in which cement mortar is filled in the inner space of FIG.

도8은 도6에서 외측면에 원주방향으로 간헐적으로 투입구가 형성된 부분 사시도FIG. 8 is a partial perspective view in which the inlet is formed intermittently in the circumferential direction in FIG.

도9는 도8에서 현장 시공된 구조를 보인 단면도9 is a cross-sectional view showing a structure constructed in Figure 8 site

* 도면중 주요 부위에 대한 부호의 설명 *Explanation of symbols on main parts in the drawing

1 나선관 2 요홈구 3 접합점 4 내측면1 Helix tube 2 Groove 3 Junction 4 Inner side

5,5' 투입구 7 시멘트몰탈 9 외측면5,5 'Inlet 7 Cement mortar 9 Outer side

본 발명은 상기의 문제점을 해결하여 주며 특히 PE 나선관의 나선권회 하여 구성된 내측면과 외측면 사이의 내부공간의 길이 방향 및 원주방향으로 관통되게 구성하기 위하여 외측면을 절곡시켜 요홈구와 접합점을 형성하면서 내측공간에서 요홈구 사이사이의 간격에 형성된 관통구간을 제공하면서 내측면과 외측면을 서로 일체화로 견고화 하여서 시공현장에서 안정적으로 사용하면서 용도의 다양화를 유도시켜 보온용 발포체 및 시멘트 몰탈과 같은 이형 복합제품 제공을 위한 제품 제공을 위한 발명으로 도면에 의거 상세히 설명하면 다음과 같다.The present invention solves the above problems, and in particular, the outer surface is bent to form the recess and the junction to penetrate in the longitudinal direction and the circumferential direction of the inner space between the inner surface and the outer surface formed by the spiral winding of the PE spiral pipe While providing a through section formed in the gap between the grooves in the inner space while solidifying the inner surface and the outer surface by integrating with each other to stably use in the construction site, induces diversification of the use of foam and cement mortar The invention for providing a product for providing the same release composite product will be described in detail with reference to the accompanying drawings.

일반적으로 내측면(4)과 외측면(9) 사이의 일정공간(A)을 형성하되 길이방향 및 원주방향으로 서로 요홈구 사이사이의 공간으로 관통하여 주어서 온수 및 냉수 등을 내측공간(A)을 통하여 주면 내측면(4)에 흐르는 내용물의 보온을 하는 제품을 제공하기 위하여 도1 및 도2 및 도4에 도시된 바와 같이 내측면(4)이 나선권회된 피이 나선관(1)에 내측공간(A)을 형성시킨 외측면(9)을 나선권회 방향으로 간헐적으로 절곡시켜서 내측공간(A)을 지나면서 형성되는 절곡시켜 지지기둥으로 요홈구(2)를 구성하되 요홈구(2)의 접합점(3)으로 내측면(4)에 일체화 시켜준 발명으로 내측면(4)과 외측면(9) 사이에 형성된 내측공간(A)에서 요홈구(2) 사이사이의 간격으로 길이방향 및 원주방향으로 서로 관통이 되어서 내측면(4)의 내측 공간에 흐르는 내용물인 배출수 및 공급수를 보온하기 위한 피이 나선 이중벽관이다In general, a predetermined space (A) is formed between the inner surface (4) and the outer surface (9), but penetrates into the space between the grooves in the longitudinal direction and the circumferential direction to the hot water and cold water to the inner space (A) In order to provide a product that keeps the contents flowing on the inner surface 4 through the main surface 4 through the inner side of the blood spiral tube 1 in which the inner surface 4 is spiral wound as shown in FIGS. 1 and 2 and 4. The outer surface 9 in which the space A is formed is bent intermittently in the spiral winding direction to form the groove 2 as a bent support pillar that is formed while passing through the inner space A. The longitudinal direction and the circumference of the inner space (A) formed between the inner surface (4) and the outer surface (9) at the interval between the grooves (2) in the invention is integrated to the inner surface (4) by the junction point (3) Discharge water and supply water which are contents penetrating each other in a direction and flowing in the inner space of the inner surface 4. A feeder tube for insulating double-wall spiral

또 본 발명의 제품에서 내측면(4)과 외측면(9)를 서로 내측공간(A)을 형성하면서 일체시켜 주는 요홈구(2)와 접합점(3)의 실시예로서는 도3에 도시된 바와 같이 나선권회 방향으로 외측면(9)을 나선방향의 길이로 절곡하여 장요홈구(2')와 장접합점(3')로 내측면(4)에 일체로 견고화시켜 구성된 제품 제공을 하는 발명이다In addition, as an embodiment of the recess 2 and the junction point 3 for integrating the inner surface 4 and the outer surface 9 while forming the inner space A in the product of the present invention as shown in FIG. In the spiral winding direction, the outer surface 9 is bent in a spiral length to provide a product formed by integrally solidifying the inner surface 4 with the long groove 2 'and the long joining point 3'.

본 발명에서 내측공간(A)에 대한 실시예로서는 내측면(4)과 외측면(9) 사이의 내측공간(A)이 길이 방향 및 원주방향으로 관통되어 있으므로 여기에 외압강도가 높은 시멘트 몰탈(7)을 충진하기 위해서는 외측면(9)의 일측에 도5에 도시된 바와같이 길이방향으로 연속적으로 절개된 시멘트 몰탈(7) 투입구(5)을 형성시켜서 제공하는 제품으로 시공 현장에서 배수관로에 따라 더 파기한 지중에 서로 연결부위에서 투입구(5)를 서로 맞추어 연결하되 투입구(5)는 시멘트 몰탈(7)의 투입작업이 용이하도록 상측으로 향하도록 조립하여 준 다음 투입구(5)를 통하여 도7에 도시된 바와같이 시멘트 몰탈(7)을 투입시켜 주면서 내측공간(A)에 충진하여 주고 일정시간 양생하여 굳어진 다음에 주위의 토양으로 되뫼움 하여 배수관로로 사용하는 발명이다As an embodiment of the inner space (A) in the present invention, since the inner space (A) between the inner surface (4) and the outer surface (9) is penetrated in the longitudinal direction and the circumferential direction, cement mortar having a high external pressure strength (7) ) Is a product provided by forming a cement mortar (7) inlet (5) continuously cut in the longitudinal direction on one side of the outer surface (9) in accordance with the drainage pipe at the construction site Connect the inlet (5) to each other at the connection site to each other in the excavated ground, but the inlet (5) is assembled to face upward to facilitate the operation of the cement mortar (7) and then through the inlet (5) in Figure 7 As shown, the cement mortar (7) is injected into the inner space (A) while filling and curing for a certain time and then hardened to the surrounding soil and is used as a drainage pipe.

이때 투입구(5)의 실시예로서는 도6에 도시된 바와 같이 길이 방향으로 절개된 투입구(5)는 시멘트 몰탈(7)을 투입하는 경우 몰탈의 비중이 높아 무거우며 또 유동성이 문제로 외측면(9)의 견고성을 유지하기 위하여 길이방향으로 간헐적으로 원형의 투입구(5')을 형성하여 주면 현장에서의 시멘트 몰탈(7)의 투입공정에서 용이하면서 내구성을 유지하여 주는 발명이다At this time, as an embodiment of the inlet (5) as shown in Figure 6 the inlet 5 cut in the longitudinal direction when the cement mortar (7) is high when the mortar is high specific gravity and high fluidity and the outer surface (9) In order to maintain the robustness of the invention, it is an invention that maintains the durability while maintaining the durability of the cement mortar (7) at the site by forming a circular inlet 5 'intermittently in the longitudinal direction.

그리고 본 발명의 제품의 사용 상태에 따라 도로 관통용 또는 지하수 등이 스며드는 연약 지반에서의 통과용으로 사용하는 경우 일반적으로 콘크리트 흄관의외측면의 주위에 시멘트 몰탈(7)을 충진하는 공간을 유지하면서 적절한 거푸집(22)을 고정하여 준 다음 시멘트 몰탈(7)을 충진시켜 사용하는데 본 발명에서는 콘크리트 흄관의 작업성 및 운반성이 매우 어려우므로 이에 대한 간편한 공사를 위하여 제공되는 발명으로서 도8에 도시된 바와같이 상기 설명한 외측면(9)에 원주방향으로 간헐적으로 투입구(5')을 형성하여 주어 제공되는 발명으로서 도9에 도시된 바와같이 매설하려는 배수관로에 거푸집(22)을 설치하고 본 발명의 제품을 배수관로에 따라 연결된 충진공간(A')에 시멘트 몰탈(7)을 충진시켜 주면 내측공간(A) 뿐만 아니라 거푸집(22) 사이의 충진공간(A')에도 시멘트 몰탈(7)이 충진되므로 일정시간 양생하여 준 다음 거푸집(22)을 해체하여 재거한 후에 주위의 토양으로 되뫼움하여 주는 발명으로 내측공간(A)에 충진된 시멘트 몰탈이 나선관(1)의 외측에 형성된 충진공간(A')에도 일체로 시멘트 몰탈(7)이 충진되고 양생되어 고강도의 피이 나선 이중벽관이 제공되는 제품이다In addition, when used for the passage of roads or in the soft ground where groundwater is infiltrated according to the use state of the product of the present invention, it is generally appropriate to maintain a space for filling cement mortar 7 around the outer side of the concrete fume pipe. Fixing the formwork (22) and then used to fill the cement mortar (7) In the present invention, because the workability and transportability of the concrete fume pipe is very difficult to provide a simple construction for this as shown in Figure 8 As the invention provided by forming the inlet (5 ') intermittently in the circumferential direction on the outer surface (9) described above as shown in Figure 9 to install the formwork 22 in the drain pipe to be embedded and the product of the present invention When filling the cement mortar (7) in the filling space (A ') connected along the drainage pipe between the formwork 22 as well as the inner space (A) Cement mortar (7) is also filled in the vacuum interval (A '), so that after curing for a certain period of time, and then dismantled and removed the mold 22, the cement filled in the inner space (A) as the invention to recompress the surrounding soil Cement mortar (7) is integrally filled and cured in the filling space (A ') formed on the outer side of the spiral tube (1) mortar is a product that provides a high-strength blood spiral double wall tube

본 발명은 내측면과 외측면 사이에 내측공간이 형성되도록 외측면이 내측공간을 통하여 절곡하여 내측면에 요홈구와 접합점으로 일체하여 제공되면서 외측면에 투입구 형성으로 내측면에 시멘트 몰탈을 충진시켜 외토압 보강 및 견고성을 보강하는 발명으로 시공현장 까지 운반은 피이 나선 이중벽관으로 운반하고 시공현장에서 배수관로에 따라 조립한 다음 시멘트 몰탈을 투입구로 통하여 충진하여 사용되는 제품으로 시공성 및 견고성과 외토압 강도가 탁월한 제품을 제공하는 발명이다The present invention is provided by the outer surface is bent through the inner space so that the inner space is formed between the inner surface and the outer surface integrally provided with the groove and the junction point on the inner surface while filling the cement mortar on the inner surface by forming the inlet on the outer surface It is an invention that reinforces earth pressure and reinforces the construction site. The transportation to the construction site is carried by double-walled spiral pipe, assembled at the construction site according to the drainage pipe, and filled with cement mortar through the inlet. Is an invention that provides an excellent product

Claims (3)

내측면(4)과 외측면(9)이 일정한 간격인 내측공간(A)을 유지하면서 형성되는 피이 나선관에 있어서 외측면(9)을 나선권회 방향에 따라 일정간격으로 절곡시켜 요홈구(2)(2')와 접합점(3)(3')으로 내측면(4)에 일체화 시켜 내측공간(A)을 형성하여 구성되는 피이 나선 이중벽관In the helical tube formed while the inner side surface 4 and the outer side surface 9 maintain the inner space A at regular intervals, the outer side surface 9 is bent at regular intervals along the spiral winding direction so that the grooves 2 2 'and a jointed double wall tube formed by forming an inner space A by integrating the inner surface 4 with the junction points 3 and 3'. 제1항에 있어서 외측면(9)에 투입구(5)(5')가 구성된 피이 나선 이중벽관The double-walled pipe of claim 1, wherein the inlet port 5, 5 'is formed on the outer side 9 제1항에 있어서 내측공간(A)에 시멘트 몰탈(7)을 충진시켜 구성된 피이 나선 이중벽관The double-walled pipe of claim 1, which is formed by filling cement mortar (7) in the inner space (A).
KR1019960007152A 1996-03-13 1996-03-13 Polyethylene spiral double-wall tube KR100358577B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960007152A KR100358577B1 (en) 1996-03-13 1996-03-13 Polyethylene spiral double-wall tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960007152A KR100358577B1 (en) 1996-03-13 1996-03-13 Polyethylene spiral double-wall tube

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020020004936A Division KR100411980B1 (en) 2002-01-28 2002-01-28 Manufacturing device of pe spiral dual wall pipe

Publications (2)

Publication Number Publication Date
KR970066240A KR970066240A (en) 1997-10-13
KR100358577B1 true KR100358577B1 (en) 2003-01-15

Family

ID=37490414

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960007152A KR100358577B1 (en) 1996-03-13 1996-03-13 Polyethylene spiral double-wall tube

Country Status (1)

Country Link
KR (1) KR100358577B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000021521A (en) * 1998-09-30 2000-04-25 민병이 High intense spiral pipe and method for manufacturing thereof
KR100618589B1 (en) * 1998-11-05 2006-09-06 민병이 Peinforced struction of spirial pipe and it's product method
KR20030012428A (en) * 2001-07-31 2003-02-12 민병이 Spiral pipe for drainage pipe
KR100554536B1 (en) * 2001-08-21 2006-02-24 민병이 Manufacturing method of high strength spiral tube for pneumatic structure for civil and road works
KR100566563B1 (en) * 2002-10-10 2006-04-04 주식회사 목양엔지니어링 건축사사무소 Fastening device for pinned double wall pipe for water and sewage pipe in construction and road construction

Also Published As

Publication number Publication date
KR970066240A (en) 1997-10-13

Similar Documents

Publication Publication Date Title
KR100358577B1 (en) Polyethylene spiral double-wall tube
KR100421462B1 (en) distributing pipe
KR100566563B1 (en) Fastening device for pinned double wall pipe for water and sewage pipe in construction and road construction
KR100490956B1 (en) Connect sheeting for drain pipe
KR100496088B1 (en) Reinforced formwork for water and sewage pipe in civil engineering and road construction
KR100550063B1 (en) Fastening table of double-walled pipe for water and sewage pipe in construction and road construction
KR100518460B1 (en) Reinforcement formwork for sewage pipe in civil engineering and road construction
KR200302175Y1 (en) Fastening device for blood spiral double wall pipe
KR100405203B1 (en) distributing pipe
KR200276105Y1 (en) Reinforcement formwork for drainage pipe
KR100445112B1 (en) Connection device of concrete fume pipe
KR100522572B1 (en) Formwork for flexible reinforcement sewer pipes in construction and road construction
JPS60141919A (en) Method of building continuous pillar-shaped landslide protection wall
KR100524188B1 (en) Connection structure of concrete fume pipe
KR100518463B1 (en) Connect equipment of concrete pipe
KR100454368B1 (en) Culvert drainage pipes buried underground in civil engineering and road works
KR200355457Y1 (en) Connect equipment of concrete pipe
KR100518464B1 (en) Form for drainpipe
KR100518458B1 (en) Formwork for connecting semicircular drainage pipes
KR200304181Y1 (en) Spiral pipe for drainage pipe
KR200268588Y1 (en) Drainage Pipe Formwork
JP2001295580A (en) High-water-pressure joint structure of centrifugal reinforced concrete pipe for propulsion and manufacturing method of the pipe
KR200233348Y1 (en) Manhole Formwork
KR200259044Y1 (en) Fixture for water pipes
KR100470981B1 (en) Sheeting of drain pipe

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
A107 Divisional application of patent
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
N231 Notification of change of applicant
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20080929

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee