JP3118772B2 - Contaminant removal device for two-way flowing water pipe - Google Patents
Contaminant removal device for two-way flowing water pipeInfo
- Publication number
- JP3118772B2 JP3118772B2 JP05348717A JP34871793A JP3118772B2 JP 3118772 B2 JP3118772 B2 JP 3118772B2 JP 05348717 A JP05348717 A JP 05348717A JP 34871793 A JP34871793 A JP 34871793A JP 3118772 B2 JP3118772 B2 JP 3118772B2
- Authority
- JP
- Japan
- Prior art keywords
- water pipe
- flowing water
- case
- filter member
- discharge
- 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
Landscapes
- Filtration Of Liquid (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、流水管を流れる流水中
に含まれる夾雑物を除去するための夾雑物除去装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing impurities contained in running water flowing through a water pipe.
【０００２】[0002]
【従来の技術】一般に、流水管、例えば、ダクタイル鋳
鉄管等においては、管内面に錆止めのためにモルタルラ
イニングが施されており、各家庭等に供給する水質を保
障している。2. Description of the Related Art Generally, in a flowing water pipe, for example, a ductile cast iron pipe or the like, a mortar lining is provided on an inner surface of the pipe to prevent rust, so that the quality of water supplied to each household is guaranteed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の技術にあっては、流水管の上流側、すなわち本管か
ら必要に応じて枝管を取り出すため、この流水管に孔穿
け工事、さらには流水管の切断工事が施される。これら
工事過程において金属粉が発生し、さらに流水管の穿
孔、切断工事で金属部分が露出し、この部分に錆が発生
するため、これら金属粉や錆粉が流水管内を流れるとい
う問題があった。However, in the above-mentioned prior art, in order to take out a branch pipe from the main pipe of the water pipe, if necessary, from the main pipe, drilling work on this water pipe is required. The cutting work of the running water pipe is performed. In these construction processes, metal powder is generated, and furthermore, a metal portion is exposed during drilling and cutting of the flowing water pipe, and rust is generated in this part, so there was a problem that these metal powder and rust powder flow in the flowing water pipe. .
【０００４】また、この穿孔、配管工事は地中で行われ
ることが殆どであり、砂等が流水管内に侵入することも
あり、水質の保障が困難であった。The drilling and piping work is almost always performed underground, and sand and the like may enter the flowing water pipe, making it difficult to ensure water quality.
【０００５】そこで、流水中のこのような夾雑物を除去
するためのフィルター部材を備えた装置等が開発されて
いる。しかし、これらのフィルター部材は水が一方向の
みに流れることを前提として設置されるものであり、流
水管の本管では水が一方向に向けて絶えず供給される
が、網目状に分岐した支管内では水の使用状態および供
給状態によっては逆流が発生し、支管等の流水管内では
双方向に流れが生じる可能性がある。そのため、フィル
ター部材を流水管内に設置しただけでは、それまでフィ
ルター部材で捕捉されて蓄積された夾雑物が、逆流と同
時にフィルター部材から離れて流れ出すため、フィルタ
ーの機能を果さなくなる事態が起こる。[0005] Therefore, an apparatus having a filter member for removing such contaminants in running water has been developed. However, these filter members are installed on the premise that water flows only in one direction.Water is continuously supplied in one direction in the main pipe of the flowing water pipe, but the support is branched in a mesh shape. In the pipe, a backflow may occur depending on the use state and supply state of water, and a flow may occur in both directions in a flowing pipe such as a branch pipe. Therefore, if the filter member is simply installed in the water pipe, impurities accumulated and accumulated by the filter member up to that time will flow away from the filter member at the same time as the backflow, and thus the function of the filter may not be performed.
【０００６】本発明は、このような問題点に着目されて
なされたもので、双方向からの流水内の夾雑物を除去で
きる双方向流水管の夾雑物除去装置を提供することを課
題とする。The present invention has been made in view of such problems, and has as its object to provide an apparatus for removing impurities in a two-way flowing water pipe which can remove impurities in flowing water in both directions. .
【０００７】[0007]
【課題を解決するための手段】本発明の双方向流水管の
夾雑物除去装置は、流水管の所定部分にケースを設置
し、前記ケースには、底壁に開閉弁を有する排出部を形
成するとともに、前記流水管との両接続部にはそれぞれ
流入口と排出口との少なくとも２つの開口を設け、さら
にケース内を、前記流入口と、排出部とに連通する流入
室と、前記排出口と連通する排出室とに区画するように
フィルター部材を嵌挿し、また、流入口と排出口にはそ
れぞれ逆流防止手段を設けたことを特徴としている。According to the present invention, there is provided an apparatus for removing contaminants from a two-way flowing water pipe, wherein a case is provided at a predetermined portion of the flowing water pipe, and the case has a discharge portion having an open / close valve on a bottom wall. In addition, at least two openings, an inlet and an outlet, are provided at both connecting portions with the water pipe, respectively, and the inside of the case is further provided with an inflow chamber communicating with the inlet and the outlet, and the drainage chamber. The filter member is inserted so as to be divided into a discharge chamber communicating with the outlet, and backflow preventing means is provided at each of the inflow port and the discharge port.
【０００８】[0008]
【作用】このケース内に流れ込む全ての流水は、逆流防
止手段によって流入室に入り、そこからフィルター部材
を通過して流出室へと流れる。そのため、水の流れが正
流であっても、または逆流に変化しても、常時この流入
室内に夾雑物が堆積されることになり、所定期間経過し
た時点で開閉弁を開放することによって夾雑物を確実に
除去することが出来る。All of the flowing water flowing into the case enters the inflow chamber by the backflow preventing means, and then flows through the filter member to the outflow chamber. Therefore, even if the flow of water changes to a normal flow or a reverse flow, impurities are always deposited in the inflow chamber. Objects can be reliably removed.
【０００９】[0009]
【実施例】以下、本発明の実施例を図面に基づいて説明
すると、１は流水管としての水道管であって、この水道
管１には、略円筒状のケース２が水密的に嵌合固定され
ている。この略円筒状のケース２の軸線は、水道管１の
軸線に対してほぼ直角に延びている。このケース内に
は、水道管１内の流水を遮るように取付けられて、水道
管１内の流水によりもたらされる夾雑物を捕捉するため
の円筒状のフィルター部材３が配置されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a water pipe as a running water pipe, and a substantially cylindrical case 2 is fitted to the water pipe 1 in a watertight manner. Fixed. The axis of the substantially cylindrical case 2 extends substantially perpendicular to the axis of the water pipe 1. In this case, there is disposed a cylindrical filter member 3 which is attached so as to block flowing water in the water pipe 1 and catches foreign substances caused by the flowing water in the water pipe 1.
【００１０】また、前記ケース２の流水管１との両接続
部には、逆流防止手段としての開閉弁４、４’、５、
５’を有する流水の流入口６、６’と排出口７、７’と
が形成されており、さらに前記流入口６、６’と排出口
７、７’とを覆うように接続管８が延設され、流水管１
に各々接続されている。また、包囲ケース２の底壁に
は、開閉弁９を有する排出管１０との接続部に孔部１１
が形成されている。On the two connecting portions of the case 2 with the water pipe 1, on-off valves 4, 4 ', 5 as backflow preventing means are provided.
The inlets 6 and 6 'of flowing water having 5' and the outlets 7 and 7 'are formed, and the connecting pipe 8 is formed so as to cover the inlets 6 and 6' and the outlets 7 and 7 '. Extending and running water pipe 1
Are connected to each other. In the bottom wall of the surrounding case 2, a hole 11 is formed at a connection portion with a discharge pipe 10 having an on-off valve 9.
Are formed.
【００１１】フィルター部材３は網目状に形成されたフ
ィルターメッシュ２２を有し、その側面には流水及び夾
雑物をフィルター部材３内に受け入れる流入筒１２が形
成され、下端には排出孔１３を有する底板１４が取付け
られている。また、上端には円環状のシール部材１５が
取付けられている。The filter member 3 has a filter mesh 22 formed in a mesh shape, and an inflow cylinder 12 for receiving flowing water and impurities into the filter member 3 is formed on a side surface thereof, and has a discharge hole 13 at a lower end. A bottom plate 14 is attached. An annular seal member 15 is attached to the upper end.
【００１２】このフィルター部材３は、前記流入筒１２
と前記流入口６、６’とが連通し、さらに排出孔１３が
ケース底壁に形成された孔部１１に接続されるようにケ
ース２内に嵌挿されている。よって、ケース２内は、フ
ィルター部材３によって、流入口６、６’及び排出孔１
３とを有する流入室１８と、排出口７、７’を有する排
出室１９とに区画されることになる。そして、ケース２
内は、前記ケース２内に形成された保持部材１６と、蓋
部材１７とによって、シール部材１５が押圧されるよう
に密閉されている。The filter member 3 is connected to the inflow cylinder 12.
And the inflow ports 6 and 6 ′ communicate with each other, and the discharge hole 13 is inserted into the case 2 so as to be connected to the hole 11 formed in the bottom wall of the case. Therefore, in the case 2, the inlets 6 and 6 ′ and the discharge holes 1 are formed by the filter member 3.
3 and an outlet chamber 19 having outlets 7, 7 '. And Case 2
The inside is sealed so that the seal member 15 is pressed by the holding member 16 and the lid member 17 formed in the case 2.
【００１３】流入口６、６’と排出口７、７’には、そ
れぞれ取付け部材２０が設けられている。そして開閉弁
４、５はケース２の内側、開閉弁４’、５’はケース２
の外側方向にのみ開放されるように、ヒンジを介して、
前記取付け部材２０に懸吊されている。なお、開閉弁
４、４’、５、５’は、流圧等による特に強い圧力を受
けない状態では、自重によって閉じられるようになって
いる。At the inlets 6, 6 'and the outlets 7, 7', mounting members 20 are provided, respectively. The on-off valves 4 and 5 are inside the case 2, and the on-off valves 4 'and 5' are
Through the hinge, so that it is only opened in the outward direction of
It is suspended from the mounting member 20. The on-off valves 4, 4 ', 5 and 5' are closed by their own weight in a state where they do not receive a particularly strong pressure such as a fluid pressure.
【００１４】このように構成された夾雑物除去装置にお
いて、この実施例ではケース２が水道管１よりも通過面
積が広く、実質的に水道管路が拡大され、流速がこの拡
大部分で急速に落ちるため、水道管１内を流れる流水中
に含まれる大部分の夾雑物Ｔは、フィルター部材３の底
板１４上に堆積される。In the apparatus for removing contaminants constructed as described above, in this embodiment, the case 2 has a larger passage area than the water pipe 1, the water pipe is substantially expanded, and the flow velocity is rapidly increased in this expanded portion. Most of the foreign substances T contained in the flowing water flowing through the water pipe 1 are deposited on the bottom plate 14 of the filter member 3 because of falling.
【００１５】また、沈下されなかった夾雑物は、フィー
ルターメッシュ２２によって捕捉されるが、流速が低下
しているため、最終的には、時間の経過とともに前記フ
ィルターメッシュ２２から剥がれ落ち、底板１４上に堆
積することになる。すなわち、双方向から流れてくる夾
雑物Ｔはフィルター部材３に到達する以前に大部分が沈
下し、フィルターメッシュ２２に付着する夾雑物Ｔは極
めて少量となり、フィルターメッシュ２２の目詰りは長
期間発生しない構造になっている。The unsettled contaminants are captured by the filter mesh 22. However, since the flow velocity is reduced, the contaminants are eventually separated from the filter mesh 22 with the passage of time, and the bottom plate 14 is removed. Will be deposited on top. That is, most of the contaminants T flowing in both directions settle before reaching the filter member 3, the amount of the contaminants T attached to the filter mesh 22 becomes extremely small, and clogging of the filter mesh 22 occurs for a long time. It is not structured.
【００１６】例えば、図１の矢印Ｐで示すように、流水
が左から右へ流れる時、流水および夾雑物Ｔは、流水管
１から接続管８、そして流入口６へと流れる。ここで、
流入圧によって開閉弁４が開放され、流水および夾雑物
Ｔは、さらに流入筒１２を介して流入室１８内へ流入す
る。For example, as shown by the arrow P in FIG. 1, when the flowing water flows from left to right, the flowing water and impurities T flow from the flowing water pipe 1 to the connecting pipe 8 and then to the inlet 6. here,
The on-off valve 4 is opened by the inflow pressure, and the flowing water and the contaminants T further flow into the inflow chamber 18 via the inflow cylinder 12.
【００１７】ここで夾雑物Ｔは、前述の流速の低下によ
り大部分が底板１４上に沈下する。流水はさらにフィル
ターメッシュ２２の内側から外側の排出室１９へ流出
し、開閉弁４’を押開き、排出口７’を通過し、接続管
８、さらには流水管１内へと排出されていく。また、前
記開閉弁４、４’が開放されている時、他の開閉弁５、
５’は閉じられているため、堆積された夾雑物がそこか
ら流出してしまうことはない。Here, most of the contaminants T sink on the bottom plate 14 due to the decrease in the flow rate. The flowing water further flows from the inside of the filter mesh 22 to the outer discharge chamber 19, pushes the opening / closing valve 4 ′, passes through the discharge port 7 ′, and is discharged into the connecting pipe 8 and further into the flowing water pipe 1. . When the on-off valves 4, 4 'are open, the other on-off valves 5, 4
Since 5 'is closed, the deposited contaminants do not flow out therefrom.
【００１８】また、流水が逆方向に変化すると、逆に今
度は開閉弁５、５’が開放され、開閉弁４、４’が閉じ
られ、流水は流入口６’から排出口７へと流れるように
流路が切り替わるが、今度は流入口６からの夾雑物の流
出は阻止される。When the flowing water changes in the opposite direction, the on-off valves 5 and 5 'are opened, the on-off valves 4 and 4' are closed, and the flowing water flows from the inlet 6 'to the outlet 7. The flow path is switched as described above, but the outflow of the contaminants from the inflow port 6 is prevented this time.
【００１９】このようにして、１度底板１４上に堆積さ
れた夾雑物Ｔは、開閉弁４、４’、５、５’によって、
流水管１への再流入が阻止される。そのため、流水の変
化とは無関係に、所定の期間の経過後に排出管１０に設
けられた開閉弁９を開放することによって、堆積した夾
雑物を排出孔１３と孔部１１、さらに排出管１０を介し
て大気中に排出させることが出来る。As described above, the contaminants T once deposited on the bottom plate 14 are removed by the on-off valves 4, 4 ', 5, 5'.
Re-inflow into the water pipe 1 is prevented. Therefore, regardless of the change of the flowing water, by opening the on-off valve 9 provided in the discharge pipe 10 after the elapse of a predetermined period, the accumulated impurities are discharged through the discharge hole 13 and the hole 11 and further the discharge pipe 10. Can be released to the atmosphere through the air.
【００２０】図２には、本発明第２実施例の夾雑物除去
装置が示されている。本発明の実施例の夾雑物除去装置
との相違点としては、フィルター部材３が、平板状のも
のであり、流入口６、６’を有する流入室１８と、排出
口７、７’とを有する排出室１９とを上下方向に区画す
るように嵌挿されている点である。FIG. 2 shows an apparatus for removing contaminants according to a second embodiment of the present invention. The difference from the apparatus for removing impurities according to the embodiment of the present invention is that the filter member 3 is a flat plate and has an inflow chamber 18 having inflow ports 6 and 6 ′ and an outflow port 7 and 7 ′. And the discharge chamber 19 is vertically inserted into the discharge chamber 19.
【００２１】このケース２の底壁は、排出部１１に向っ
て傾斜している。また２３は、ケース２内に形成された
フィルター部材３を支持するための保持部材である。The bottom wall of the case 2 is inclined toward the discharge section 11. Reference numeral 23 denotes a holding member for supporting the filter member 3 formed in the case 2.
【００２２】この夾雑物除去装置においても、前述の本
発明実施例の夾雑物除去装置と同じように、流水の変化
に伴って逆流防止手段としての開閉弁４、４’、５、
５’が作動する。そしてさらに、フィルターメッシュ２
２の夾雑物の捕捉面が下方向になるために、夾雑物はよ
り付着しにくく、剥がれ落ちやすくなる。すなわち、フ
ィルターメッシュ２２の目詰りは長期間発生しないとい
った利点がある。In this apparatus for removing contaminants, as with the apparatus for removing contaminants of the above-described embodiment of the present invention, the on-off valves 4, 4 ', 5
5 'operates. And furthermore, filter mesh 2
Since the capturing surface of the foreign substance 2 is directed downward, the foreign substance is less likely to adhere and is easily peeled off. That is, there is an advantage that clogging of the filter mesh 22 does not occur for a long time.
【００２３】また、前述の実施例と同様に、ケース２の
底壁に堆積された夾雑物Ｔは、孔部１１より、排出管１
０の開閉弁９を通過して外部に放出される。また、夾雑
物の排出作業は、水流の変化とは無関係に所定の期間経
過後に定期的に行うことが出来る。Further, similarly to the above-described embodiment, the contaminants T deposited on the bottom wall of the case 2 are discharged from the hole 11 through the discharge pipe 1.
The gas is discharged to the outside through the open / close valve 9 of 0. The discharge operation of the contaminants can be performed periodically after a predetermined period has elapsed irrespective of the change in the water flow.
【００２４】以上、実施例を図面により説明してきた
が、具体的な構成は実施例に限られるものではなく、本
発明の要旨を逸脱しない範囲における変更や追加等があ
っても本発明に含まれる。Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to the embodiment, and any changes or additions without departing from the gist of the present invention are included in the present invention. It is.
【００２５】例えば、片側に流入口と排出口とを多数個
設置し、流体通過面積を拡げることもでき、さらに必要
があれば、ばねを用いて開閉弁を付勢することもでき
る。For example, a large number of inlets and outlets can be provided on one side to increase the fluid passage area, and if necessary, the on / off valve can be urged using a spring.
【００２６】[0026]
【発明の効果】このケース内に流れ込む全ての流水は、
逆流防止手段によって流入室に入り、そこからフィルタ
ー部材を通過して流出室へと流れる。そのため、水の流
れが正流であっても、または逆流に変化しても、常時こ
の流入室内に夾雑物が堆積されることになり、所定期間
経過した時点で開閉弁を開放することによって夾雑物を
確実に除去することが出来る。The running water flowing into this case is
The backflow preventing means enters the inflow chamber, from which it flows through the filter member to the outflow chamber. Therefore, even if the flow of water changes to a normal flow or a reverse flow, impurities are always deposited in the inflow chamber. Objects can be reliably removed.
【００２７】[0027]
【図１】本発明実施例の夾雑物除去装置の要部断面図で
ある。FIG. 1 is a sectional view of a main part of an apparatus for removing impurities according to an embodiment of the present invention.
【図２】本発明第２実施例の夾雑物除去装置の要部断面
図である。FIG. 2 is a sectional view of a main part of a foreign matter removing device according to a second embodiment of the present invention.
１ 水道管（流水管） ２ ケー
ス ３ フィルター部材 ４、４’ 開閉
弁（逆流防止手段） ５、５’ 開閉弁（逆流防止手段） ６、６’ 流入
口 ７、７’ 排出口 ８ 接続
管 ９ 開閉弁 １０ 排出
管 １１ 孔部 １２ 流
入筒 １３ 排出孔 １４ 底
板 １５ リング １６ 保
持部材 １７ 蓋部材 １８ 流
入室 １９ 排出室 ２０ 取
付け部材 ２２ フィルターメッシュ ２３ 保
持部材DESCRIPTION OF SYMBOLS 1 Water pipe (flow water pipe) 2 Case 3 Filter member 4, 4 'On-off valve (backflow prevention means) 5, 5' On-off valve (backflow prevention means) 6, 6 'Inlet 7, 7' Outlet 8 Connection pipe 9 On-off valve 10 Drain pipe 11 Hole 12 Inflow cylinder 13 Drain hole 14 Bottom plate 15 Ring 16 Holding member 17 Cover member 18 Inflow chamber 19 Drain chamber 20 Mounting member 22 Filter mesh 23 Holding member
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｂ０１Ｄ 29/36 Ｚ ──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. 7 Identification code FI B01D 29/36 Z
Claims (6)
記ケースには、底壁に開閉弁を有する排出部を形成する
とともに、前記流水管との両接続部にはそれぞれ流入口
と排出口との少なくとも２つの開口を設け、さらにケー
ス内を、前記流入口と、排出部とに連通する流入室と、
前記排出口と連通する排出室とに区画するようにフィル
ター部材を嵌挿し、また、流入口と排出口にはそれぞれ
逆流防止手段を設けたことを特徴とする双方向流水管の
夾雑物除去装置。1. A case is installed at a predetermined portion of a water pipe, a discharge section having an open / close valve on a bottom wall is formed in the case, and an inlet and a drain are provided at both connection portions with the water pipe. An inflow chamber provided with at least two openings with an outlet, and further inside the case, communicating with the inflow port and the discharge section;
A filter member is inserted so as to be divided into a discharge chamber communicating with the discharge port, and a backflow prevention means is provided at each of the inflow port and the discharge port. .
される流水管の流体通過面積よりも実質的に拡大されて
いる請求項１に記載の双方向流水管の夾雑物除去装置。2. The apparatus according to claim 1, wherein a fluid passage area in the case is substantially larger than a fluid passage area of a water pipe connected to both ends.
のみ開放可能な開閉弁であり、少なくとも接続部の一流
入口と、他の接続部の一排出口とが同方向に開放可能に
なっている請求項１または２に記載の双方向流水管の夾
雑物除去装置。3. The backflow prevention means is an on-off valve that can be opened only to flowing water in one direction, and at least one inlet of a connecting portion and one outlet of another connecting portion can be opened in the same direction. The apparatus for removing contaminants in a two-way flowing water pipe according to claim 1 or 2, wherein:
ィルター部材の円筒内部が流入室である請求項１ないし
３のいずれかに記載の双方向流水管の夾雑物除去装置。4. The apparatus for removing impurities from a two-way flowing water pipe according to claim 1, wherein the filter member is cylindrical, and the inside of the cylinder of the filter member is an inflow chamber.
平板状であり、流入室が、排出室よりも下方に設けられ
ている請求項１ないし３のいずれかに記載の双方向流水
管の夾雑物除去装置。5. The two-way flowing water pipe according to claim 1, wherein the filter member is a flat plate arranged substantially horizontally, and the inflow chamber is provided below the discharge chamber. Contaminant removal device.
よって開閉可能に懸吊されている請求項３ないし５のい
ずれかに記載の双方向流水管の夾雑物除去装置。6. The apparatus for removing impurities in a two-way flowing water pipe according to claim 3, wherein the on-off valve is suspended so as to be openable and closable by a hinge mounted on an upper part thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05348717A JP3118772B2 (en) | 1993-12-27 | 1993-12-27 | Contaminant removal device for two-way flowing water pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05348717A JP3118772B2 (en) | 1993-12-27 | 1993-12-27 | Contaminant removal device for two-way flowing water pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07185223A JPH07185223A (en) | 1995-07-25 |
| JP3118772B2 true JP3118772B2 (en) | 2000-12-18 |
Family
ID=18398899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05348717A Expired - Fee Related JP3118772B2 (en) | 1993-12-27 | 1993-12-27 | Contaminant removal device for two-way flowing water pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3118772B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5203171B2 (en) * | 2008-12-24 | 2013-06-05 | 株式会社水道技術開発機構 | Strainer equipment |
| KR102654032B1 (en) * | 2023-10-17 | 2024-04-03 | 케이원에코텍 주식회사 | Two way strainer |
-
1993
- 1993-12-27 JP JP05348717A patent/JP3118772B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07185223A (en) | 1995-07-25 |
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