KR20010100080A - A sleeve with a trap in construction - Google Patents

A sleeve with a trap in construction Download PDF

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Publication number
KR20010100080A
KR20010100080A KR1020010057148A KR20010057148A KR20010100080A KR 20010100080 A KR20010100080 A KR 20010100080A KR 1020010057148 A KR1020010057148 A KR 1020010057148A KR 20010057148 A KR20010057148 A KR 20010057148A KR 20010100080 A KR20010100080 A KR 20010100080A
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KR
South Korea
Prior art keywords
trap
sleeve
water
layer
leachate
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Ceased
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KR1020010057148A
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Korean (ko)
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김지태
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김지태
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Priority to KR1020010057148A priority Critical patent/KR20010100080A/en
Publication of KR20010100080A publication Critical patent/KR20010100080A/en
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/042—Arrangements of means against overflow of water, backing-up from the drain
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/041—Accessories therefor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F2005/0412—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with means for adjusting their position with respect to the surrounding surface
    • E03F2005/0413—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with means for adjusting their position with respect to the surrounding surface for height adjustment
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F2005/0416—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps with an odour seal

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sink And Installation For Waste Water (AREA)

Abstract

본 발명은 건축용 배수 시설에 사용되는 트랩을 겸한 슬리브에 관한 것이다.The present invention relates to a sleeve that also serves as a trap for use in building drainage facilities.

종래에는 트랩과 슬리브를 각각 분리 설치해야 하므로 시공상 번거로운 폐단이 있을 뿐만 아니라, 트랩은 이의 배수공과 악취 차단 물 고임실이 작아서 폐수 속에 혼합된 찌꺼기 등의 협잡물에 의해 배수공과 물 고임실이 쉽게 막힘 되어지기 때문에 뚜껑을 열고 하수를 배출관으로 바로 유출시키고 있는 관계로 비위생적인 폐단이 있었던 것이다. 그리고 슬리브는 지수 패킹이 없기 때문에 슬리브 콘크리트 타설 시 시멘트 액이 누출되어 콘크리트 층을 약화시키는 폐단이 있을 뿐만 아니라, 침출수 배수공이 없기 때문에 방수층과 타일층 사이의 모래층에서 생긴 침출수가 역류하여 벽면과 바닥면이 접하는 코너 부위에서 누수 현상이 생겨 벽면이나 바닥면을 손상시키는 폐단이 있었고, 또한 슬리브는 장기 사용되면 콘크리트 층과의 사이에 틈새가 생겨 이 사이로 누수된 물이 아래층으로 유출되어 아래층의 천장을 손상시키는 폐단이 있었던 것이다.Conventionally, since traps and sleeves must be separately installed, there are not only cumbersome waste ends in the construction, but traps have small drainage holes and odor blocking chambers, so that the drain holes and water chambers can be easily blocked by debris such as garbage mixed in the wastewater. As a result, the lid was opened and the sewage was discharged directly into the discharge pipe, resulting in an unsanitary waste. And since the sleeve has no exponential packing, there is a closed end that weakens the concrete layer due to leakage of cement liquid when the sleeve is poured. In addition, since there is no leachate drainage hole, the leachate from the sand layer between the waterproof layer and the tile layer flows back to the wall and the floor At the corners of the corners, water leakage occurred, which caused damage to the wall or floor, and when the sleeve was used for a long time, a gap was formed between the concrete layer and the leaked water flowed down to the floor, damaging the ceiling below. There was a dismissal to let.

본 발명은 이상의 문제점을 해결하고자 발명한 것으로 이의 발명 요지는 슬리브와 트랩을 겸용되게 하되, 슬리브 몸체(1)의 중간부에는 요입홈(1-2)을 형성하여 지수 패킹(8)이 끼움되게 하고, 그 상부에 형성된 트랩 연결부(1-3)에는 트랩 몸체(5)의 나사부(5-2)가 나사 끼움도어 트랩의 높낮이를 조절되게 하고, 트랩 몸체(5)의 상부에는 요입홈(5-1)이 형성되고, 그 내측 상 주벽에는 원주상으로 다수의 배수공(5-3)이 형성되고, 그 하부에는 접시 형상의 물 고임실(5-4)이 형성되며,전기한 요입홈(5-1)에는 접시 형상으로 된 여과구(6)의 상주연에 형성된 걸림턱(6-1)이 걸림되게 하고, 여과구(6)의 내주연에 형성된 안치턱에는 여과판(7)이 안치되고, 그 저면에는 다수의 배수공(6-3)을 형성함으로서 여과판(7)이 배수공(7-1)으로 유입된 하수가 여과구(6)의 저면에 형성된 배수공(6-3)으로 배수된 후 물 고임실을 거쳐 트랩 몸체(5)의 주벽 상부측에 형성된 배수공(5-3)으로 배출되게 하였기 때문에 많은 양의 배수가 가능하고, 슬리브 몸체(1) 상주연에는 격벽(2)과 플렌지(2-1)를 개재하여 방수처리 마감부(2-2)와 타일층(3)과의 사이에 고임된 침출수의 배출공(2-3)을 형성하였기 때문에 방수층의 시공이 완벽함은 물론 침출수의 역류 현상을 방지할 수 있는 것이다.The present invention has been invented to solve the above problems, but the gist of the invention is to combine the sleeve and the trap, the middle portion of the sleeve body (1) to form a recessed groove (1-2) so that the water packing (8) is fitted In addition, the trap connection portion (1-3) formed on the upper portion of the trap (5-2) of the trap body (5) to adjust the height of the screwing door trap, the upper portion of the trap body (5) -1) is formed, a plurality of drain holes 5-3 are circumferentially formed in the inner upper circumferential wall, a plate-shaped water chamber 5-4 is formed in the lower portion thereof, and the recessed groove 5 The locking jaw 6-1 formed on the upper circumference of the filter opening 6 in the shape of a dish is caught by -1), and the filter plate 7 is placed on the settling jaw formed on the inner circumference of the filter opening 6. In the bottom surface, a plurality of drain holes 6-3 are formed, so that the sewage flowing into the drain hole 7-1 from the filter plate 7 is formed at the bottom of the filter opening 6. After being drained to the drain hole 6-3, the water is discharged to the drain hole 5-3 formed at the upper side of the main wall of the trap body 5 through the water chamber, so that a large amount of drainage is possible, and on the sleeve body 1 At the periphery, since the discharge hole (2-3) of leached water that has accumulated is formed between the waterproofing finishing portion (2-2) and the tile layer (3) through the partition (2) and the flange (2-1). The construction of the waterproof layer is perfect, as well as to prevent the backflow of leachate.

Description

건축용 트랩을 겸한 슬리브{A sleeve with a trap in construction}A sleeve with a trap in construction}

본 발명은 건축용 트랩을 겸한 슬리브에 관한 것이다.The present invention relates to a sleeve that also serves as a construction trap.

종래에는 건축 시 배수 시설에 사용되는 트랩과 슬리브가 각각 독립되어 있어 분리 설치해야하므로 시공상 번거로움이 있을 뿐만 아니라, 트랩은 이의 배수공과 악취 차단용 물 고임실이 작아서 폐수 속에 함유된 찌꺼기 등의 협착물에 의해 배수공과 물 고임실이 쉽게 막힘되기 때문에 뚜껑을 열고 폐수를 배수관에 바로 배출시키는 비위생적인 폐단이 있었던 것이다. 그리고 슬리브는 지수 패킹이 없기 때문에 슬리브 콘크리트 타설 시 시멘트 액이 누출되어 시멘트 콘크리트층의 강도를 약화시키는 폐단이 있을 뿐만 아니라, 침출수 배수공이 없기 때문에 방수층과 타일층 사이의 모래층에서 생긴 침출수가 역류되어 바닥면과 벽면 사이의 코너부로 누수되어 벽면과 바닥면을 손상시키는 폐단이 있었던 것이다.Conventionally, since traps and sleeves used in drainage facilities are independent in construction, they need to be separately installed, which is not only cumbersome in construction, but traps have small drainage holes and odor blocking water chambers, so that the traps of wastes contained in waste water are trapped. Because the water was easily blocked by the drainage hole and the water chamber, there was an unsanitary waste point that opened the lid and discharged the wastewater directly into the drain. And since the sleeve has no exponential packing, there is a closed end that reduces the strength of the cement concrete layer due to leakage of cement liquid when the sleeve concrete is poured. In addition, since there is no leachate drainage hole, the leachate generated from the sand layer between the waterproof layer and the tile layer is flowed back There was a closed end that leaked into the corner between the surface and the wall, damaging the wall and the floor.

본 발명은 이상의 문제점을 해결하고자 발명한 것으로 이의 발명 요지는 슬리브 몸체의 하부에는 하수관 연결부가 형성되고, 상부에는 방수층 마감 처리부와 침출수 배출공이 형성되며, 그 내측에는 트랩 연결부를 형성하여 이에 트랩 몸체를 연결하되, 이의 높낮이를 조절할 수 있게 하고, 트랩 몸체의 내주면 상부에는 원 둘레상으로 다수의 배수공을 형성하고, 그 하부에는 악취 차단 물 고임실이 형성되고, 트랩 몸체의 상주연에 형성된 요입홈에는 여과구의 상주연 걸림턱이 걸림되게 하고, 이 여과구의 하주면에는 다수의 배수공이 형성되고, 전기한 안치턱에는 여과판이 안치되게 함으로서 트랩의 폐수 배출량을 최대로 함과 동시 방수 처리층과 타일 처리층 사이에 생긴 침출수는 침출수 배출공으로 배출되게 함으로서 침출수의 역류 현상을 방지한 것이다.The present invention has been invented to solve the above problems, the gist of the invention is formed in the lower portion of the sleeve body is connected to the sewage pipe, the upper part is formed of the waterproofing layer and the leachate discharge hole, the trap connection is formed on the inside of the trap body It is connected, but it is possible to adjust the height of the upper, the inner circumferential surface of the trap body to form a plurality of drain holes on the circumference, the odor blocking water chamber is formed in the lower portion, the recess groove formed in the upper periphery of the trap body is filtered The circumferential edge of the sphere is caught, and a plurality of drain holes are formed on the lower circumferential surface of the filter opening, and the filter plate is placed on the settled jaw to maximize the wastewater discharge of the trap, and at the same time the waterproofing layer and the tile treatment layer. The leachate generated in between is discharged to the leachate discharge hole to prevent leachate backflow. It is.

도 1은 본 발명의 사시도1 is a perspective view of the present invention

도 2는 본 발명의 종단면도2 is a longitudinal cross-sectional view of the present invention;

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1. 슬리브 몸체 1-1. 하수관 연결부 1-2. 요입홈1. Sleeve body 1-1. Sewer pipe connection 1-2. Home

1-3. 트랩 연결부 2. 격벽 2-1. 플렌지1-3. Trap Connection 2. Bulkhead 2-1. Flange

2-2. 방수처리 마감부 2-3. 침출수 배출공 3. 타일층2-2. Waterproof finish 2-3. Leachate Drainage 3. Tile Layer

3-1. 모래층 3-2. 방수층 4. 하수관 연결구3-1. Sand layer 3-2. Waterproof layer 4. Sewer pipe connection

4-1. 연결 나사부 4-2. 하수관 끼움부 4-3. 하수관4-1. Connection screw part 4-2. Sewer Pipe Fittings 4-3. drainpipe

5. 트랩 몸체 5-1. 요입홈 5-2. 나사부5. Trap Body 5-1. Concave groove 5-2. Screw

5-3. 배수공 5-4. 물 고임실 6. 여과구5-3. Drainage 5-4. Water chamber 6. filter opening

6-1. 걸림턱 6-2. 안치턱 6-3. 배수공6-1. Jam Jaw 6-2. Settlement 6-3. Drain

7. 여과판 7-1. 배수공 8. 지수 패킹7. Filter Plate 7-1. Drainhole 8. Index Packing

이를 도면에 의거 상세히 설명하면 다음과 같다.This will be described in detail based on the drawings.

슬리브 몸체(1)의 외주벽에는 지수 패킹(8)을 끼우는 요입홈(1-2)이 형성되고, 하주연에는 하수관 연결구(4)의 관 연결부(1-1)가 형성되고, 슬리부 몸체(1)의 상주연에는 플렌지(2-1)와 격벽(2)을 개재한 방수 처리 마감부(2-2)와 침출수 배출공(2-3)이 형성되고, 그 내측에는 트랩 연결부(1-3)를 형성하여 트랩 몸체(5)의 나사부(5-2)를 연결하되, 트랩 몸체(5)의 상주벽에는 일정 간격으로 다수의 배수공(5-3)이 형성되고, 하주면에는 접시 형상의 물 고임실(5-4)이 형성되며, 그 상주연에 형성된 요입홈(5-1)에는 여과구(6)의 상주연에 형성된 걸림턱(6-1)이 걸림되고, 여과구(6)의 하주연에는 다수의 배수공(5-3)이 형성되며, 여과구(6)의 상주연에 형성된 안치턱(6-2)에는 여과판(7)이 안치되게 한 것이다.In the outer circumferential wall of the sleeve body (1) is formed a recessed groove (1-2) for fitting the still water packing (8), the pipe peripheral portion (1-1) of the sewer pipe connector 4 is formed in the lower peripheral edge, the sleeve body At the periphery of (1), a waterproofing finish part 2-2 and a leachate discharge hole 2-3 through the flange 2-1 and the partition wall 2 are formed, and inside the trap connection part 1 -3) to connect the screw portion (5-2) of the trap body (5), a plurality of drain holes (5-3) are formed on the upper wall of the trap body 5 at regular intervals, the lower surface of the plate A water chamber 5-4 having a shape is formed, and a locking jaw 6-1 formed at the upper circumference of the filter opening 6 is engaged with the concave groove 5-1 formed at the upper circumference thereof. A plurality of drain holes 5-3 are formed at the lower periphery of 6), and the filter plate 7 is settled in the settling 6-2 formed at the upper periphery of the filter opening 6.

이상과 같이 구성된 본 발명은 트랩을 겸한 슬리브로 사용하는 것인 바, 이를 실시할 시는 통상의 경우와 같이 슬리브 몸체(1)를 콘크리트 슬리브 층에 매설하는 것으로 이를 매설할 때는 트랩의 높낮이는 나사부(5-2)를 이용하면 되고, 슬리브몸체(1)의 요입홈(1-2)에는 지수 패킹(8)을 끼운 상태에서 콘크리트를 타설하고 슬리브 콘크리트층이 양생된 후 방수 처리할 때는 방수층(3-2)의 마감부가 방수 처리 마감부(2-2)에서 마감되게 하면 완벽한 마감이 되는 것이고, 타일층(3)과 방수 처리층 사이에 개재된 모래층(3-1)에서 침출되는 침출수는 침출수 배출공(2-3)으로 낙하되게 하면 침출수의 역류가 방지된다. 그리고 슬리브 몸체(1) 하부의 하수관 끼움부(4-2)에는 하수관(4-3)을 연결하면 되는 것이고, 배수 시는 바닥면에 있는 폐수나 싱크대 등에서 배수된 폐수가 트랩 몸체(5)의 여과구(6) 내로 유입되면 배수공(6-3)을 통해 물 고임실(5-4)에 유입된 후 트랩 몸체(5)의 주벽에 형성된 배수공(5-3)을 통해 하수관(4-3) 내로 유입되고, 이때 하수관(4-3)에서 상승되는 악취는 물 고임실(5-4)에서 차단되는 것은 공지한 바와 같은 것이다.The present invention configured as described above is to be used as a sleeve that also serves as a trap. When this is carried out, the sleeve body 1 is embedded in the concrete sleeve layer as in the usual case. (5-2) may be used, and when the concrete is poured into the recess groove (1-2) of the sleeve body (1) with the watertight packing (8) inserted therein and the sleeve concrete layer is cured, the waterproof layer ( If the finish of the 3-2) is finished in the waterproofing finish (2-2) is a perfect finish, the leachate leaching from the sand layer (3-1) interposed between the tile layer (3) and the waterproofing layer is When it is made to fall to the leachate discharge hole 2-3, backflow of leachate is prevented. The sewage pipe fitting portion 4-2 of the lower portion of the sleeve body 1 may be connected to the sewage pipe 4-3. In the case of drainage, the waste water discharged from the waste water or the sink on the bottom surface of the trap body 5 When introduced into the filter opening (6), the sewer pipe (4-3) through the drain hole (5-3) formed in the main wall of the trap body (5-4) after entering the water chamber (5-4) through the drain hole (6-3) It is as known in the art that the odor flowing into the sewage pipe 4-3 is blocked in the water chamber 5-4.

이상과 같이 본 발명은 트랩과 슬리브의 기능을 겸용되게 하되, 트랩의 높낮이는 나사부(5-2)를 이용할 수 있게 하였기 때문에 설치 및 사용상 편리하고, 트랩 몸체(5)의 주벽 상부에는 일정 간격으로 배수공(5-3)이 형성되고, 그 하부에는 물 고임실(5-4)을 형성하되, 트랩 몸체(5)의 상주연 요입홈(5-1)에는 여과구(6)의 걸림턱이 걸림되게 함으로서 청소가 용이할 뿐만 아니라, 많은 양의 폐수를 배수할 수 있게 하였기 때문에 트랩 자체가 찌꺼기에 의해 막히는 일이 없고, 또한 방수 처리층(3-2)과 타일층(3)과 사이에서 생긴 침출수는 침출수 배출공(2-3)을 통해 배출되게 하였기 때문에 침출수의 역류 현상을 방지할 수 있어 건축 시공 및 건축 문화 향상에 크게 기여할 수 있어 매우 유용한 발명이다.As described above, the present invention allows the function of the trap and the sleeve to be combined, but the height of the trap makes it possible to use the threaded portion 5-2, which is convenient for installation and use, and at a predetermined interval on the upper wall of the trap body 5. A drain hole 5-3 is formed, and a lower portion of the water chamber 5-5 is formed, and the locking jaw of the filter opening 6 is caught in the peripheral peripheral recess 5-1 of the trap body 5. This makes it easy to clean and to drain a large amount of waste water, so that the trap itself is not blocked by debris, and the trap between the waterproofing layer 3-2 and the tile layer 3 Since the leachate is discharged through the leachate discharge hole (2-3) it is possible to prevent the backflow phenomenon of the leachate is a very useful invention that can greatly contribute to the construction and improvement of the building culture.

Claims (1)

슬리브 몸체(1)의 하부에는 하수관 연결구(4)가 설치되고, 중간부에는 지수 패킹(8)을 끼우는 요입홈(1-2)이 형성되고, 상부 외측에는 격벽(2)과 플렌지(2-1)를 개재한 방수 처리 마감부(2-2)와 침출수 배출공(2-3)이 형성되고, 내측에는 트랩 연결부(1-3)를 형성하여 트랩 몸체(5)의 나사부(5-2)가 연결되고, 트랩 몸체의 상주연에는 요입홈(5-1)이 형성되며, 주벽 상부에는 다수의 배수공(5-3)이 형성되고, 그 하부에는 물 고임실(5-4)을 형성하며, 전기한 요입홈(5-1)에는 여과구(6)의 상주연에 형성된 걸림턱(6-1)이 끼움되고, 여과구(6)의 상부에는 여과판(7)의 안치턱(6-2)이 형성되고, 하부에는 다수의 배수공(6-3)이 설치됨을 특징으로 한 건축용 트랩을 겸한 슬리브.A sewer pipe connector 4 is installed at the lower portion of the sleeve body 1, and a recessed groove 1-2 is formed at the middle portion to fit the water packing 8, and at the upper outer side, the partition 2 and the flange 2 are formed. 1) through the waterproofing finish portion (2-2) and the leachate discharge hole (2-3) is formed, the trap connection portion (1-3) is formed inside the screw portion (5-2) of the trap body (5) ) Is connected to the upper periphery of the trap body, the inlet groove (5-1) is formed, a plurality of drain holes (5-3) are formed in the upper wall, the lower portion of the water chamber (5-4) The hooking recess 6-1 formed at the upper circumference of the filter opening 6 is fitted into the recessed groove 5-1, and the settling jaw of the filter plate 7 is placed on the upper portion of the filter opening 6. 2) is formed, the lower portion of the sleeve serving as a building trap, characterized in that a plurality of drain holes (6-3) is installed.
KR1020010057148A 2001-09-17 2001-09-17 A sleeve with a trap in construction Ceased KR20010100080A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109056916A (en) * 2018-09-20 2018-12-21 华科住宅工业（东莞）有限公司 Secondary drainage collector and its installation application structure
CN112695874A (en) * 2021-02-16 2021-04-23 重庆工业职业技术学院 Secondary drainage device arranged on side surface of floor drain downpipe
CN113309190A (en) * 2021-04-15 2021-08-27 殷志 Building drainage device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6484368A (en) * 1987-09-26 1989-03-29 Toshiba Corp Document checking device
US5299836A (en) * 1990-03-21 1994-04-05 Woods Robert J Floor waste fitting support
KR980008326U (en) * 1996-07-30 1998-04-30 이상호 Fixture of construction drain trap
KR200150630Y1 (en) * 1996-12-10 1999-07-01 유인균 Floor drain trap unit
KR200192282Y1 (en) * 2000-03-03 2000-08-16 장명수 Drain trap
KR200220668Y1 (en) * 2000-10-09 2001-04-16 오세영 Sleeve for Drain Trap
KR200234505Y1 (en) * 2001-02-13 2001-09-28 설남수 draining trap
KR200265343Y1 (en) * 2001-09-17 2002-02-21 김지태 A sleeve with a trap for houses

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6484368A (en) * 1987-09-26 1989-03-29 Toshiba Corp Document checking device
US5299836A (en) * 1990-03-21 1994-04-05 Woods Robert J Floor waste fitting support
KR980008326U (en) * 1996-07-30 1998-04-30 이상호 Fixture of construction drain trap
KR200150630Y1 (en) * 1996-12-10 1999-07-01 유인균 Floor drain trap unit
KR200192282Y1 (en) * 2000-03-03 2000-08-16 장명수 Drain trap
KR200220668Y1 (en) * 2000-10-09 2001-04-16 오세영 Sleeve for Drain Trap
KR200234505Y1 (en) * 2001-02-13 2001-09-28 설남수 draining trap
KR200265343Y1 (en) * 2001-09-17 2002-02-21 김지태 A sleeve with a trap for houses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109056916A (en) * 2018-09-20 2018-12-21 华科住宅工业（东莞）有限公司 Secondary drainage collector and its installation application structure
CN112695874A (en) * 2021-02-16 2021-04-23 重庆工业职业技术学院 Secondary drainage device arranged on side surface of floor drain downpipe
CN113309190A (en) * 2021-04-15 2021-08-27 殷志 Building drainage device

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