JPH039030B2 - - Google Patents
Info
- Publication number
- JPH039030B2 JPH039030B2 JP62229693A JP22969387A JPH039030B2 JP H039030 B2 JPH039030 B2 JP H039030B2 JP 62229693 A JP62229693 A JP 62229693A JP 22969387 A JP22969387 A JP 22969387A JP H039030 B2 JPH039030 B2 JP H039030B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- aquarium
- tank
- supply pipe
- water supply
- 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 118
- 239000003651 drinking water Substances 0.000 claims description 15
- 235000020188 drinking water Nutrition 0.000 claims description 15
- 239000000463 material Substances 0.000 description 4
- 230000035622 drinking Effects 0.000 description 3
- 241000238631 Hexapoda Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は断水時に飲料水を無駄なく確実に供給
するようにした半密閉式低圧水槽に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a semi-enclosed low-pressure water tank that reliably supplies drinking water without waste during a water outage.
（従来の技術）
近い将来に於いて、一般家庭に於ける水の使用
量は益々増大し、供給する側もその対応に苦慮せ
ざるを得ないことは必定である。まして、水の供
給源は天候に左右されることは、何人も知る処で
あり、毎年、何処かの地方で、渇水に悩まされて
いるニユースは、度々耳にすることである。も
し、その様な状況の中で、近年予想される処の巨
大地震が発生したならば、水に対する供給が完全
に停止し、現代社会の活動が、水の問題から崩壊
することは明らかである。その様な時でも、生理
的欲求である飲料水の確保は、不可欠であること
と、誰しも思う処ではあるが、しかしながら、そ
れに対処して、水の確保を行つている人は希にし
か見当たらない。それは、日本人の多くの人々
が、水の供給に対する完全な停止を体験していな
いし、又、もしその様になつても、誰かが何とか
してくれるであろうという、漠然たる、安易な考
え方が支配的であること、水を溜め置くための、
簡便で有効な手段が存在しないからである。その
ため、簡便な手段の提供を目的として、本発明に
至つたものである。(Prior Art) In the near future, the amount of water used in general households will increase more and more, and it is inevitable that the supply side will have to struggle to cope with this increase. Furthermore, everyone knows that the source of water supply is affected by the weather, and every year we often hear about some region suffering from drought. It is clear that if a huge earthquake, such as that predicted in recent years, were to occur in such a situation, the water supply would completely stop and the activities of modern society would collapse due to water problems. . Even in times like these, everyone believes that securing drinking water is a physiological need and is essential. However, very few people deal with this and secure water. I can only find it. This is because many people in Japan have not experienced a complete stoppage of their water supply, and even if that happens, it is a vague and easy idea that someone will do something about it. is dominant, for storing water,
This is because there is no simple and effective means. Therefore, the present invention was developed with the aim of providing a simple means.
（発明が解決しようとする課題）
従来の受水槽は、地上、或は地下に設置し、そ
れを電動ポンプにて、高置水槽迄で押し上げて、
その落差水圧により配水がなされるものが大方で
あつた。(Problem to be solved by the invention) Conventional water tanks are installed above ground or underground, and are pushed up to an elevated water tank using an electric pump.
In most cases, water was distributed based on the head water pressure.
しかし、これは、機械の設備費が多大なため、
一般家庭に普及されることが困難であつた。尚、
この方式は電力を使用しているので、停電になる
と、ポンプが稼働しなくなるため、地上の受水槽
より高置水槽へ水を押し上げることが出来なくな
つた。その上、高置水槽の中の水も、汎用に使わ
れる様に配管がなされているため、残溜されたせ
つかくの水も、直ぐ底をついてしまつた。又、地
上にある、受水槽に残された水は、一応飲料水と
して確保出来るが、そこからの水の取出し迄をも
考慮したものではなく、不便をきたしていた。 However, this is because the machine equipment costs are large.
It has been difficult to popularize it among ordinary households. still,
This system uses electricity, so if there is a power outage, the pump will stop working, making it impossible to pump water from the ground-based water tank to the elevated water tank. Furthermore, the water in the elevated water tank was piped so that it could be used for general purposes, so the remaining water quickly ran out. In addition, although the water left in the water tank on the ground can be secured as drinking water, no consideration has been given to how to extract the water from there, causing inconvenience.
そこで、その様な問題を解決するために、断水
が発生すると、汎用給水管への給水が停止し、飲
料用等に定められた給水管にのみ、給水が出来る
様、配管を組込んだ、低圧式の受水槽と、それに
附随する空気の入切り弁を発明したものである。 Therefore, in order to solve such problems, we have built in piping so that when a water outage occurs, the water supply to the general-purpose water supply pipes is stopped, and water can only be supplied to water supply pipes designated for drinking purposes. He invented a low-pressure water tank and an associated air on/off valve.
（課題を解決するための手段）
先ず、本低圧水槽についての基本を説明する。
本低圧水槽は「圧縮しない流体において、密閉し
た容器内で、静止している流体の任意の一箇所に
圧力を加えると、全ての点にその圧力がそのまま
伝達される」という、いわゆる「パスカルの原
理」に基づいたものである。従つて、水槽の形状
を球形にするということは、水槽内の水圧によ
り、水槽本体を構成する材にかかる曲げ応力が零
になるための、変形の究極点を先取りしたもので
ある。そのことは、その材の引張り応力のみでこ
の水圧を受け支えればよいことになる。尚、一般
の水道本管の水圧は、1.0Kg/cm2といわれている
が、地方都市における最大水圧でも、3.0〜5.0
Kg／cm2とのことであるから、本水槽を構成する物
質は、金属はもちろんのこと、硬質プラスチツク
等でも、充分それに対応出来るものである。(Means for solving the problem) First, the basics of this low-pressure water tank will be explained.
This low-pressure water tank is based on the so-called ``Pascal's principle'', which states that ``If pressure is applied to any one point of a stationary fluid in a sealed container, that pressure will be transmitted unchanged to all points.'' It is based on the "principle". Therefore, making the aquarium spherical means anticipating the ultimate point of deformation, when the bending stress applied to the material constituting the aquarium body becomes zero due to the water pressure within the aquarium. This means that it is sufficient to support this water pressure only by the tensile stress of the material. The water pressure of general water mains is said to be 1.0Kg/ cm2 , but even the maximum water pressure in local cities is 3.0 to 5.0Kg/cm2.
Kg/cm 2 , so the materials that make up this aquarium can be made of not only metal but also hard plastic.
続いて、空気の入切り弁についての基本を説明
する。この空気の入切り弁は、上部に空気孔のあ
る、吊鐘形の弁室をもつた円筒の中に、水に浮く
様に造られた、弁体となる球を入れ、水による浮
力と、水槽内の圧力により円筒上部の弁座を閉じ
る方式のものである。しかし、断水となり、水槽
内の圧力が零以下になつた時、水槽の密閉状態を
解き、水槽内に空気を流入させて、特定した水栓
からの水の出を円滑にする働きと共に、本管の通
水が再開された時、水槽内の空気を余さず外に排
出しなければならない働きをも兼ね備えているも
のである。 Next, we will explain the basics of air on/off valves. This air on/off valve has a cylinder with a bell-shaped valve chamber with an air hole at the top, and a ball that is made to float on water and acts as a valve body. , which uses the pressure inside the water tank to close the valve seat at the top of the cylinder. However, when there is a water outage and the pressure inside the aquarium falls below zero, the water tank is unsealed, air is allowed to flow into the aquarium, and water flows smoothly from the specified faucet. It also has the function of exhausting all the air inside the tank to the outside when the water flow through the pipe is resumed.
（実施例） 以下、図面に従つて本発明を説明する。(Example) The present invention will be explained below with reference to the drawings.
第１図は、第２図に示したＣ−Ｃ線と、第３図
に示したＡ−Ａ線で切断した、水槽の四分球の内
側の断面斜視図である。一次側給水管２と、二次
側汎用給水管３は水槽１の底部を突抜けて、水槽
内の高い位置に放出口２−ａ、吸水口３−ａが来
るように配管を行い、二次側飲料用等給水管４も
水槽１の底部を突抜けて配管を行うが、その吸水
口４−ａは水槽内の低い位置とする。そして、排
水管５の呑み口５−ａは、水槽１の底の中心、つ
まり、水槽内の最低の位置に、水槽内に突出する
こと無く、排水管５の配管を行う。又、空気の入
切り弁６は水槽１の最上部の位置に取付けるもの
とする。尚、この空気の入切り弁６についての詳
細な説明は、後の、第４図以下の説明で行う。 FIG. 1 is a cross-sectional perspective view of the inside of the quarter sphere of the aquarium, taken along the line CC shown in FIG. 2 and the line A-A shown in FIG. 3. The primary side water supply pipe 2 and the secondary side general-purpose water supply pipe 3 penetrate through the bottom of the water tank 1, and are piped so that the discharge port 2-a and the water intake port 3-a are located at a high position in the water tank. The next drinking water supply pipe 4 also penetrates through the bottom of the aquarium 1, but its water inlet 4-a is located at a low position within the aquarium. The spout 5-a of the drain pipe 5 is installed at the center of the bottom of the aquarium 1, that is, at the lowest position within the aquarium, without protruding into the aquarium. Furthermore, the air on/off valve 6 shall be installed at the top of the water tank 1. A detailed explanation of this air on/off valve 6 will be given later in the explanation from FIG. 4 onwards.
第２図は、第３図Ａ−Ａ線で示した様に、内部
の配管を切断しないように、水槽を横に切つた、
断面図である。 Figure 2 shows the aquarium cut horizontally to avoid cutting the internal piping, as shown by line A-A in Figure 3.
FIG.
水槽１の中心に排水管５の呑み口５−ａを明
け、一次側給水管２、二次側汎用給水管３二次側
飲料用等給水管４をその回りに配置させたもので
ある。尚、一次側給水管２の放出口２−ａと、二
次側汎用給水管３の吸水口３−ａは、水槽内に古
い水を停滞させないために、水の動きに回転力が
生じやすいように、放出口は曲り管にし、尚、そ
の方向も、中心をはずして、斜めに向けたもので
ある。 A drinking spout 5-a of a drain pipe 5 is opened in the center of the water tank 1, and a primary water supply pipe 2, a secondary general-purpose water supply pipe 3, and a secondary drinking water supply pipe 4 are arranged around it. In addition, since the discharge port 2-a of the primary water supply pipe 2 and the water intake port 3-a of the secondary general-purpose water supply pipe 3 do not allow old water to stagnate in the water tank, rotational force is likely to occur in the movement of water. As shown, the outlet is a bent pipe, and its direction is off-center and oriented diagonally.
第３図は、第２図Ｂ−Ｂ線で示した様に、水槽
１の中心を通り、一次側給水管２、二次側汎用給
水管３、排水管５、空気の入切り弁６を含んで切
断した、水槽の縦断面図である。 As shown by line B-B in FIG. 2, FIG. FIG. 2 is a vertical cross-sectional view of the aquarium, including the water tank.
平常時の水は、一次側給水管２を通り、その放
出口２−ａより、水槽内に放出され、水槽内を循
環しながら二次側汎用給水管３の吸水口３−ａ、
及び二次側飲料用等給水管４の吸水口４−ａよ
り、それぞれの管に入り、給水されるものであ
る。しかし、断水が発生し水槽内の圧力が下が
り、零以下になると、水槽１の最上部に取付けら
れた、空気の入切り弁６が開かれて、水槽内に空
気が流入する。それと同時に、水槽内の水は一次
側給水管２の放出口２−ａから逆に吸込まれて、
本管へ向かつて逆流を開始する。しかし、その逆
流する水も、放出口２−ａの水位で終了するもの
である。故に、その逆流する水の量を最少にする
ためには、放出口２−ａの高さを出来るだけ高く
するのが肝要である。又、二次側汎用給水管３に
より使用される水の量を節水させたいので、その
吸水口３−ａも出来るだけ高い位置が望ましい。
そして、二次側飲料用等給水管４の吸水口４−ａ
は水槽内の低い位置にあるため、給水は継続され
るものである。しかし、水槽内の沈澱物質を吸込
まないために、適当に水槽内に突出させる必要が
ある。尚、一次側給水管２の放出口２−ａと、二
次側飲料用等給水管の吸水口４−ａとの高さの差
が、その水槽の有効貯水量であるので出来るだけ
その差を大きくしたものである。又、水槽１の最
低部に位置する排水管５は、水道本管の汚泥物質
が、一次側給水管２の放出口２−ａより水槽内に
放出され、沈澱した時、排出しやすいように、そ
の呑み口５−ａは槽内に突出させないことであ
る。 Normal water passes through the primary water supply pipe 2, is discharged into the water tank from its outlet 2-a, and circulates in the water tank through the water intake port 3-a of the secondary general-purpose water supply pipe 3,
The water enters the respective pipes from the water intake port 4-a of the secondary drinking water supply pipe 4 and is supplied with water. However, when a water outage occurs and the pressure inside the tank drops to below zero, the air on/off valve 6 attached to the top of the tank 1 is opened and air flows into the tank. At the same time, the water in the water tank is sucked in from the outlet 2-a of the primary water supply pipe 2,
It begins to flow backwards towards the mains. However, the water flowing back also ends at the water level at the outlet 2-a. Therefore, in order to minimize the amount of water flowing back, it is important to make the height of the outlet 2-a as high as possible. Furthermore, since it is desired to save the amount of water used by the secondary general-purpose water supply pipe 3, it is desirable that the water intake port 3-a be located as high as possible.
Then, the water intake port 4-a of the secondary drinking water supply pipe 4, etc.
Since the tank is located low in the tank, the water supply is continuous. However, it is necessary to properly protrude into the aquarium in order to prevent the precipitate from being sucked into the aquarium. The difference in height between the outlet 2-a of the primary water supply pipe 2 and the water intake 4-a of the secondary drinking water supply pipe is the effective water storage capacity of the tank, so the difference is as much as possible. It is a larger version of . In addition, the drain pipe 5 located at the lowest part of the water tank 1 is designed to facilitate the discharge of sludge from the water main when it is discharged into the water tank from the outlet 2-a of the primary water supply pipe 2 and settles. , the drinking spout 5-a should not protrude into the tank.
第４図は、第５図Ｅ−Ｅ線で切断した、空気の
入切り弁６の断面斜視図である。 FIG. 4 is a cross-sectional perspective view of the air on/off valve 6 taken along the line EE in FIG. 5. FIG.
まず、上部に空気孔６−2−ａがある。円筒６
−2の中に弁体６−3を入れ、それを受止める玉受
け台６−4を円筒６−2の下部より、捩子結合され
た弁組織を、水槽１の最上部に接合されたフラン
ジ付きソケツト６−1に捩子結合させる。次に、
二重の輪をいくつかの腕木で撃げてある台輪６−
５を、円筒６−2の上部に捩子結合させ、その上
に、ドウナツ形の外形をした防虫網６−6を載せ、
その上から、内側に突起のある、お椀形のキヤツ
プ６−7をかぶせて、台輪６−5に捩子結合しなが
ら、締付け固定したものである。 First, there is an air hole 6-2 -a at the top. cylinder 6
- Insert the valve body 6-3 into the cylinder 6-2 , place the ball holder 6-4 that receives it from the bottom of the cylinder 6-2 , and connect the threaded valve tissue to the top of the water tank 1. Connect to flanged socket 6-1 with screws. next,
Architrave 6 with a double ring made of several arms
5 is connected to the upper part of the cylinder 6-2 with a screw, and an insect screen 6-6 having a donut-shaped outer shape is placed on top of it.
A bowl-shaped cap 6-7 with a protrusion on the inside is placed over it, and the cap is screwed and fixed to the architrave 6-5 .
（発明の効果）
以上説明したように、本発明においては、水槽
の最上部に断水時には水槽内を外気と連通するが
通水時には水槽内を外気と遮断する弁を設け、給
水管の放出口と汎用給水管の吸水口は水槽内の高
い位置に設けるが、飲料用給水管の吸水口は水槽
内の低い位置に設けるように水槽を構成したの
で、平常の通水時には汎用水も飲料水も供給する
が、断水時には自動的に汎用水の供給を停止して
飲料水を優先して供給することができる。そのた
め、断水時には貴重な水を汎用水として使わず飲
料水として有効に利用でき、給水が再開されたと
きは手動による弁の開閉などの煩わしい操作をせ
ずに自動的に汎用水と飲料水との供給ができる。
また本発明による水槽内の圧力は水道水の自然水
圧程度（1.0Kg/cm2〜5.0Kg/cm2）の低いものであ
り、しかも水槽外面にはポンプや取付台のような
重量物を取り付けることがないために、水槽を形
成する材質はそれほど強度の大きいものでなくて
すみ、生産コストを低く押えることができるとい
う利点もある。(Effects of the Invention) As explained above, in the present invention, a valve is provided at the top of the aquarium that communicates the inside of the aquarium with the outside air when the water is cut off, but isolates the inside of the aquarium from the outside air when the water is flowing, and a valve is provided at the top of the water supply pipe. The water intake for the general-purpose water supply pipe is installed at a high position in the tank, but the water intake for the drinking water supply pipe is installed at a low position in the tank, so that during normal water flow, both general-purpose water and drinking water However, in the event of a water outage, the general-purpose water supply can be automatically stopped and drinking water given priority. Therefore, in the event of a water outage, valuable water can be effectively used as drinking water instead of being used as general-purpose water, and when the water supply is resumed, it can automatically switch between general-purpose water and drinking water without the need for cumbersome operations such as manually opening and closing valves. can be supplied.
Furthermore, the pressure inside the aquarium according to the present invention is as low as the natural water pressure of tap water (1.0Kg/cm 2 to 5.0Kg/cm 2 ), and heavy objects such as a pump and a mounting base are attached to the outside of the aquarium. Therefore, the material used to form the aquarium does not need to be very strong, which has the advantage of keeping production costs low.
第１図は半密閉式低圧水槽の構造を明示した、
断面斜視図であり、第２図、第３図はその横断面
図、及び縦断面図である。第４図は空気の入切り
弁の組織を明示した、断面斜視図であり、第５
図、第６図はその横断面図、及び縦断面図であ
る。
１…水槽、２…一次側給水管、３…二次側汎用
給水管、４…二次側飲料用給水管、５…排水管、
６…空気の入切り弁、６−1…ソケツト、６−2…
円筒、６−3…球、６−4…玉受け台、６−5…台
輪、６−6…防虫網、６−7…キヤツプ。
Figure 1 clearly shows the structure of a semi-closed low-pressure water tank.
It is a cross-sectional perspective view, and FIGS. 2 and 3 are a cross-sectional view and a longitudinal cross-sectional view thereof. Figure 4 is a cross-sectional perspective view clearly showing the structure of the air on/off valve;
FIG. 6 is a cross-sectional view and a longitudinal cross-sectional view thereof. 1...Aquarium, 2...Primary water supply pipe, 3...Secondary general purpose water supply pipe, 4...Secondary drinking water supply pipe, 5...Drain pipe,
6...Air on/off valve, 6-1 ...Socket, 6-2 ...
Cylinder, 6-3 ...ball, 6-4 ...ball holder, 6-5 ...architrave, 6-6 ...insect net, 6-7 ...cap.
Claims (1)
には水槽内を外気と連通するが通水時には水槽内
を外気と遮断する弁と、該水槽内の高い位置に放
出口を有する給水管と、水槽内の高い位置に吸水
口を有する汎用給水管と、水槽内の低い位置に吸
水口を有する飲料用給水管とを有することを特徴
とする半密閉式低圧水槽。 ２ 前記弁は、通水時には水槽内の水圧により空
気孔を閉塞し、断水時には前記空気孔を開放する
弁体を有する特許請求の範囲第１項に記載の半密
閉式低圧水槽。 ３ 排水口が前記水槽の最低位置に設けられた排
水管を有する特許請求の範囲第１項または第２項
に記載の半密閉式低圧水槽。[Scope of Claims] 1. An aquarium, a valve provided at the top of the aquarium that communicates the inside of the aquarium with the outside air when water is cut off, but isolates the inside of the aquarium from the outside air when water is flowing, and a valve that is disposed at a high position within the aquarium. A semi-closed low-pressure water tank characterized by having a water supply pipe having an outlet, a general-purpose water supply pipe having a water intake at a high position within the tank, and a drinking water supply pipe having a water intake at a low position within the tank. 2. The semi-enclosed low-pressure water tank according to claim 1, wherein the valve has a valve body that closes the air hole by water pressure in the tank when water is flowing, and opens the air hole when water is cut off. 3. The semi-enclosed low-pressure water tank according to claim 1 or 2, which has a drain pipe with a drain port provided at the lowest position of the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229693A JPS6484890A (en) | 1987-09-16 | 1987-09-16 | Semi-closed low pressure water tank and air intake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229693A JPS6484890A (en) | 1987-09-16 | 1987-09-16 | Semi-closed low pressure water tank and air intake valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6484890A JPS6484890A (en) | 1989-03-30 |
| JPH039030B2 true JPH039030B2 (en) | 1991-02-07 |
Family
ID=16896225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62229693A Granted JPS6484890A (en) | 1987-09-16 | 1987-09-16 | Semi-closed low pressure water tank and air intake valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6484890A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3655948B2 (en) * | 1995-08-21 | 2005-06-02 | 博司 小山 | Water storage device |
| CN103590450A (en) * | 2013-11-27 | 2014-02-19 | 莫桂平 | Water tank with air pressure capable of being increased |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281613A (en) * | 1975-12-27 | 1977-07-08 | Nitsupou Barubu Kougiyou Kk | Emergency water tanks |
| JPS5839719A (en) * | 1981-09-02 | 1983-03-08 | Nippon Steel Corp | Formation of nozzle for bottom blowing of gas |
-
1987
- 1987-09-16 JP JP62229693A patent/JPS6484890A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5281613A (en) * | 1975-12-27 | 1977-07-08 | Nitsupou Barubu Kougiyou Kk | Emergency water tanks |
| JPS5839719A (en) * | 1981-09-02 | 1983-03-08 | Nippon Steel Corp | Formation of nozzle for bottom blowing of gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6484890A (en) | 1989-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |