JPH0432272B2 - - Google Patents
Info
- Publication number
- JPH0432272B2 JPH0432272B2 JP58241426A JP24142683A JPH0432272B2 JP H0432272 B2 JPH0432272 B2 JP H0432272B2 JP 58241426 A JP58241426 A JP 58241426A JP 24142683 A JP24142683 A JP 24142683A JP H0432272 B2 JPH0432272 B2 JP H0432272B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- diaphragm
- pilot
- bleed
- valve
- 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
Classifications
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/402—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm
- F16K31/404—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm the discharge being effected through the diaphragm and being blockable by an electrically-actuated member making contact with the diaphragm
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Description
【発明の詳細な説明】
(a) 発明の目的
〔発明の技術分野〕
本発明は、水用電磁弁などのように流体を制御
する電磁弁として有効な、パイロツト式のダイヤ
フラム弁に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Object of the Invention [Technical Field of the Invention] The present invention relates to a pilot-type diaphragm valve that is effective as a solenoid valve for controlling fluid, such as a water solenoid valve.
第１図は従来のパイロツト式ダイヤフラム弁の
断面図で、特公昭54−43209号公報などに記載の
ものと基本的に同じである。ボデーＢには、入口
１と出口２間に、主弁孔３が形成され、主弁座４
に当接、離隔して主弁孔３を開閉するダイヤフラ
ム５が設けられている。ダイヤフラム５の中央に
は、パイロツト弁孔６が形成され、ダイヤフラム
背室７と入口１間には、パイロツト弁孔６より小
径のブリード孔８が形成されている。ボデーＢ上
には、ソレノイド９で駆動されるプランジヤー１
０が配設され、プランジヤー下端に取り付けられ
た弁体１１で、パイロツト弁孔６の開閉が行われ
る。
FIG. 1 is a sectional view of a conventional pilot type diaphragm valve, which is basically the same as that described in Japanese Patent Publication No. 43209/1983. A main valve hole 3 is formed in the body B between an inlet 1 and an outlet 2, and a main valve seat 4
A diaphragm 5 is provided which opens and closes the main valve hole 3 by coming into contact with and separating from it. A pilot valve hole 6 is formed in the center of the diaphragm 5, and a bleed hole 8 having a smaller diameter than the pilot valve hole 6 is formed between the diaphragm back chamber 7 and the inlet 1. On the body B, there is a plunger 1 driven by a solenoid 9.
The pilot valve hole 6 is opened and closed by a valve body 11 attached to the lower end of the plunger.
図示のようにソレノイド９が非通電となり、プ
ランジヤー１０がコイルバネ１２で押し下げられ
て、弁体１１がパイロツト弁孔６に当接し閉止す
ると、入口１→ブリード孔８→ダイヤフラム背室
７の径路で流体がダイヤフラム背室７に流入す
る。そしてダイヤフラム背室７に流入した流体圧
でダイヤフラム５が弁座４に押しつけられ、主弁
孔３が閉じる。 As shown in the figure, when the solenoid 9 is de-energized, the plunger 10 is pushed down by the coil spring 12, and the valve body 11 comes into contact with the pilot valve hole 6 to close it, fluid flows through the path of the inlet 1 → bleed hole 8 → diaphragm back chamber 7. flows into the diaphragm back chamber 7. Then, the diaphragm 5 is pressed against the valve seat 4 by the fluid pressure flowing into the diaphragm back chamber 7, and the main valve hole 3 is closed.
図の閉止状態において、ソレノイド９が通電さ
れ、プランジヤー１０がコイルバネ１２に抗して
固定鉄心１３に吸引されると、弁体１１がパイロ
ツト弁孔６の弁座から離隔して、該パイロツト弁
孔６が開く。するとダイヤフラム背室７中の流体
が、該パイロツト弁孔６を通過して出口２側に流
出する。このとき、ブリード孔８の径よりパイロ
ツト弁孔６の径が大きいので、ダイヤフラム背室
７への流入量より流出量が多くなり、ダイヤフラ
ム背室７中の圧力が低下する。その結果入口１か
ら流入した流体の圧力で、ダイヤフラム５が押し
上げられ、ダイヤフラム５が主弁座４から離隔し
て、主弁孔３が開く。 In the closed state shown in the figure, when the solenoid 9 is energized and the plunger 10 is attracted to the fixed core 13 against the coil spring 12, the valve body 11 is separated from the valve seat of the pilot valve hole 6 and 6 opens. Then, the fluid in the diaphragm back chamber 7 passes through the pilot valve hole 6 and flows out to the outlet 2 side. At this time, since the diameter of the pilot valve hole 6 is larger than the diameter of the bleed hole 8, the amount of outflow is greater than the amount of inflow into the diaphragm back chamber 7, and the pressure in the diaphragm back chamber 7 is reduced. As a result, the diaphragm 5 is pushed up by the pressure of the fluid flowing in from the inlet 1, the diaphragm 5 is separated from the main valve seat 4, and the main valve hole 3 is opened.
ブリード孔８からダイヤフラム背室７への流入
量より流出量が多くなるようにするには、前記の
ようにブリード孔８の径よりパイロツト弁孔６の
径が大きいことが必要である。そのために、大径
のパイロツト弁孔６を通過する流体に抗して該パ
イロツト弁孔６を開閉できるように、ソレノイド
９として大型のものを使用している。 In order to make the outflow amount from the bleed hole 8 into the diaphragm back chamber 7 larger than the inflow amount, it is necessary that the diameter of the pilot valve hole 6 is larger than the diameter of the bleed hole 8 as described above. For this reason, a large solenoid 9 is used so that the pilot valve hole 6 can be opened and closed against the fluid passing through the large diameter pilot valve hole 6.
またブリード孔８が小さ過ぎると、塵埃でブリ
ード孔８が目詰まりを起こし、ダイヤフラム５の
動作不良を来す恐れがある。したがつて目詰まり
を起こさない程度の大きなブリード孔８より更に
大きなパイロツト弁孔６を設け、この大径で大流
量のパイロツト弁孔６を開閉するのに充分なソレ
ノイドを使用しなければならない。 Furthermore, if the bleed hole 8 is too small, the bleed hole 8 may become clogged with dust, which may cause malfunction of the diaphragm 5. Therefore, it is necessary to provide a pilot valve hole 6 larger than the bleed hole 8, which is large enough not to cause clogging, and to use a sufficient solenoid to open and close this large-diameter, large-flow pilot valve hole 6.
本発明の技術的課題は、従来のパイロツト式ダ
イヤフラム弁におけるこのような問題を解消し、
パイロツト弁孔を小さくして、ソレノイドを小形
化できるようにすることにある。
The technical problem of the present invention is to solve these problems in conventional pilot type diaphragm valves, and
The objective is to make the solenoid smaller by making the pilot valve hole smaller.
(b) 発明の構成
〔発明の技術的手段〕
この技術的課題を解決するために講じた本発明
による技術的手段は、主弁孔を開閉するダイヤフ
ラムの中央にパイロツト弁孔を備え、入口側とダ
イヤフラム背室との間にブリード孔を備えたパイ
ロツト式ダイヤフラム弁であつて、該ブリード孔
の一端と他端との間に、屈曲部を少なくとも１つ
備え、ブリード孔を通過する液体の流動抵抗を大
きくすることにより、パイロツト弁孔よりブリー
ド孔の流量が小さく、かつパイロツト弁孔の径が
ブリード孔の径と同程度か小さくなるようにした
構成を採つている。(b) Structure of the Invention [Technical Means of the Invention] The technical means of the present invention taken to solve this technical problem is to provide a pilot valve hole in the center of the diaphragm that opens and closes the main valve hole. A pilot type diaphragm valve having a bleed hole between the bleed hole and the diaphragm back chamber, the pilot type diaphragm valve having at least one bent portion between one end and the other end of the bleed hole, the flow of liquid passing through the bleed hole. By increasing the resistance, the flow rate of the bleed hole is smaller than that of the pilot valve hole, and the diameter of the pilot valve hole is made to be equal to or smaller than the diameter of the bleed hole.
この技術的手段によれば、ブリード孔の径はパ
イロツト弁孔の径と同程度かより大きくなつてい
る。しかしながらブリード孔は、途中に屈曲部を
有しかつ経路が長いために流体の流動抵抗が大き
く、パイロツト弁孔より流路の径を大きくして
も、パイロツト弁孔より流量が増えることはな
く、従来と同様に、ブリード孔よりパイロツト弁
孔の流量を大きくすることができる。
According to this technical measure, the diameter of the bleed hole is comparable to or larger than the diameter of the pilot valve hole. However, since the bleed hole has a bend in the middle and has a long path, the flow resistance of the fluid is large, and even if the diameter of the flow path is made larger than that of the pilot valve hole, the flow rate will not increase compared to the pilot valve hole. As in the prior art, the flow rate through the pilot valve hole can be made larger than through the bleed hole.
したがつてパイロツト弁孔を開いた場合、ダイ
ヤフラム背室にブリード孔から流入する量より、
出口側に流出する量が多く、ダイヤフラム背室の
圧力が円滑に低下して、ダイヤフラムが開く。 Therefore, when the pilot valve hole is opened, the amount flowing into the diaphragm back chamber from the bleed hole is
A large amount flows out to the outlet side, the pressure in the diaphragm back chamber decreases smoothly, and the diaphragm opens.
このように本発明によれば、ブリード孔に比べ
てパイロツト弁孔の径を小さくできるので、ブリ
ード孔の流量に支障を来すことなしに、パイロツ
ト弁孔を開閉するためのソレノイドを小形、軽量
化できる。なおパイロツト弁孔を小径にすること
で、パイロツト弁孔が塵埃で目詰まりする恐れも
あるが、パイロツト弁孔は、ブリード孔と違つて
常時弁体で開閉が行われるので、弁体がパイロツ
ト弁孔の弁座に接触、離隔する際に、塵埃が容易
に分離し流出できる。 As described above, according to the present invention, the diameter of the pilot valve hole can be made smaller than that of the bleed hole, so the solenoid for opening and closing the pilot valve hole can be made smaller and lighter without interfering with the flow rate of the bleed hole. can be converted into Note that by making the pilot valve hole small in diameter, there is a risk that the pilot valve hole may become clogged with dust. However, unlike the bleed hole, the pilot valve hole is constantly opened and closed by the valve body, so the valve body is the same as the pilot valve. When contacting and separating from the valve seat of the hole, dust can easily separate and flow out.
(c) 発明の効果
本発明の技術的手段によれば、単にブリード孔
の途中に屈曲部を設けるだけで、パイロツト弁孔
より流量を増やすことなしに、ブリード孔の径を
充分に大きくして、塵埃で目詰りしたりしないよ
うにすることができる。したがつて非常に簡易な
構成で所期の目的を達成することができる。(c) Effect of the invention According to the technical means of the present invention, the diameter of the bleed hole can be made sufficiently large without increasing the flow rate from the pilot valve hole by simply providing a bent part in the middle of the bleed hole. This can prevent clogging with dust. Therefore, the intended purpose can be achieved with a very simple configuration.
(d) 発明の実施例
次に本発明によるパイロツト式ダイヤフラム弁
が実際上どのように具体化されるかを実施例で説
明する。第２図は本発明によるパイロツト式ダイ
ヤフラム弁の主要部を示す平面図と断面図であ
る。５はダイヤフラムであり、従来と同様にゴム
などの軟質弾性材でできている。またこのような
性質のダイヤフラム５に直接パイロツト弁孔６や
ブリード孔８を形成するのは困難なため、通常は
第１図にも示すように、剛体からなるデイスク１
４にパイロツト弁孔６およびブリード孔８を形成
し、このデイスク１４をダイヤフラム５に装着す
る構成が採用されている。(d) Examples of the invention Next, examples will explain how the pilot type diaphragm valve according to the invention is actually implemented. FIG. 2 is a plan view and a sectional view showing the main parts of a pilot type diaphragm valve according to the present invention. 5 is a diaphragm, which is made of a soft elastic material such as rubber as in the conventional case. Furthermore, since it is difficult to form the pilot valve hole 6 and the bleed hole 8 directly on the diaphragm 5 having such properties, it is usually difficult to form the pilot valve hole 6 and the bleed hole 8 directly on the diaphragm 5, so as shown in FIG.
A pilot valve hole 6 and a bleed hole 8 are formed in the disk 4, and the disk 14 is mounted on the diaphragm 5.
本発明でもこのようにデイスク１４を使用し、
デイスク１４の中央にブリード孔６を開け、かつ
ダイヤフラム背室７側と入口１間を連通するブリ
ード孔８を備えている。ところが本発明における
ブリード孔８は、従来と異なり、孔径がパイロツ
ト弁孔６より大きい。またブリード孔８は、途中
に２つのＬ形の屈曲部８１，８２を有しており、
クランク状になつている。したがつて本発明にお
けるブリード孔８は、途中に２つの屈曲部８１，
８２を有し、かつブリード孔の経路が長くなつた
ことにより、ブリード孔８を流れる流体の流動抵
抗が増加する。その結果孔径が大きくなつたにも
拘わらず、ブリード孔８を通過する流体の流量は
増加しない。 The present invention also uses the disk 14 in this way,
A bleed hole 6 is formed in the center of the disk 14, and a bleed hole 8 is provided that communicates between the diaphragm back chamber 7 side and the inlet 1. However, the bleed hole 8 in the present invention has a larger hole diameter than the pilot valve hole 6, unlike the conventional one. Moreover, the bleed hole 8 has two L-shaped bent parts 81 and 82 in the middle.
It has a crank shape. Therefore, the bleed hole 8 in the present invention has two bent parts 81,
82 and the path of the bleed hole is lengthened, the flow resistance of the fluid flowing through the bleed hole 8 increases. As a result, even though the hole diameter has increased, the flow rate of fluid passing through the bleed hole 8 does not increase.
このようにブリード孔８は、目詰まりを起こさ
ない程度まで大きくでき、それでいて流量はパイ
ロツト弁孔６より少ない。そのため、パイロツト
弁孔６の孔径をブリード孔８と同程度かより小さ
くすることが可能となる。勿論従来のブリード孔
８よりも小さくできることはいうまでもない。 In this way, the bleed hole 8 can be made large enough to not cause clogging, yet the flow rate is less than that of the pilot valve hole 6. Therefore, it is possible to make the diameter of the pilot valve hole 6 comparable to or smaller than that of the bleed hole 8. Of course, it goes without saying that the bleed hole 8 can be made smaller than the conventional bleed hole 8.
したがつてプランジヤー下端の弁体で制御され
る流体の流量が少なく、小形のソレノイドでも容
易にパイロツト弁孔を通過する流体を制御でき
る。 Therefore, the flow rate of fluid controlled by the valve body at the lower end of the plunger is small, and even a small solenoid can easily control the fluid passing through the pilot valve hole.
第３図はブリード孔８の他の実施例を示すもの
で、上方から孔８３を開け、側方から孔８４を、
下方から孔８４をそれぞれ開けることで、２つの
屈曲部８１，８２を形成している。このとき、側
方から開けた孔８４は盲にする必要があるが、こ
の実施例では、第２図の実施例と違つて詰め物を
詰めてない。しかしながらダイヤフラム５が開閉
動作するときの変形部となる逆Ｕ字状部１５の側
壁が常時、側方からの孔８４の開口を閉じるよう
に圧接する構成になつている。そのため、側方か
らの孔８４はわざわざ詰め物を入れる必要がな
い。 FIG. 3 shows another embodiment of the bleed hole 8, in which the hole 83 is opened from above and the hole 84 is opened from the side.
Two bent portions 81 and 82 are formed by opening holes 84 from below. At this time, the hole 84 opened from the side needs to be blinded, but in this embodiment, unlike the embodiment shown in FIG. 2, it is not filled with stuffing. However, the side wall of the inverted U-shaped portion 15, which is a deformed portion when the diaphragm 5 opens and closes, is always pressed against the opening of the hole 84 from the side. Therefore, there is no need to go to the trouble of filling the hole 84 from the side.
第４図は本発明の更に別の実施例を示すもの
で、イは断面図、ロは底面図である。この実施例
では、デイスク１４のダイヤフラム５側の面１６
に円弧状の溝８６を形成し、この溝８６の一端即
ちダイヤフラム背室７側に上方からの孔８３を開
け、他端に側方からの孔８４を開けてある。そし
て該側方からの孔８４と連通するように、下方か
らの孔８４を、入口１側から開けてある。なお側
方からの孔８４は、第３図の場合と同様に、ダイ
ヤフラム５の逆Ｕ字状部１５の側壁で閉鎖され
る。またデイスク１４は、溝８６側がダイヤフラ
ム５と重なるため、溝８６の開口はダイヤフラム
５で塞がれ、孔状の流路が形成される。そしてこ
の円弧状の長い流路がブリード孔８の一部を構成
しているため、ブリード孔８を通過する流体の経
路が長く、流体の流動抵抗が一層増大する。その
結果、ブリード孔８とパイロツト弁孔６との断面
積比を更に大きくできる。 FIG. 4 shows still another embodiment of the present invention, in which A is a sectional view and B is a bottom view. In this embodiment, the surface 16 of the disk 14 on the diaphragm 5 side
An arc-shaped groove 86 is formed in the groove 86, and a hole 83 is formed from above at one end of the groove 86, that is, on the side of the diaphragm back chamber 7, and a hole 84 is formed from the side at the other end. A hole 84 from below is opened from the entrance 1 side so as to communicate with the hole 84 from the side. Note that the hole 84 from the side is closed by the side wall of the inverted U-shaped portion 15 of the diaphragm 5, as in the case of FIG. Further, since the groove 86 side of the disk 14 overlaps with the diaphragm 5, the opening of the groove 86 is closed by the diaphragm 5, and a hole-like flow path is formed. Since this arc-shaped long flow path constitutes a part of the bleed hole 8, the path of the fluid passing through the bleed hole 8 is long, and the flow resistance of the fluid further increases. As a result, the cross-sectional area ratio between the bleed hole 8 and the pilot valve hole 6 can be further increased.
以上の各実施例からも明らかなように、ブリー
ド孔８の流動抵抗を大きくするための屈曲部は、
円弧状でも角度をもつたものでも差支えない。 As is clear from each of the above embodiments, the bent portion for increasing the flow resistance of the bleed hole 8 is
It can be arcuate or angular.
第１図は従来のパイロツト式ダイヤフラム弁の
全容を示す断面図、第２図以下は本発明によるパ
イロツト式ダイヤフラム弁の実施例を示すもの
で、第２図は第１実施例の平面図と断面図、第３
図は第２実施例の断面図、第４図は第３実施例の
断面図と底面図である。
図において、１は入口、２は出口、５はダイヤ
フラム、１４はデイスク、６はパイロツト弁孔、
７はダイヤフラム背室、８はブリード孔、８１，
８２は屈曲部、８６は溝、８３は上方からの孔、
８４は側方からの孔、８５は下方からの孔をそれ
ぞれ示す。
Fig. 1 is a sectional view showing the entire structure of a conventional pilot type diaphragm valve, Fig. 2 and the following shows an embodiment of the pilot type diaphragm valve according to the present invention, and Fig. 2 is a plan view and a cross section of the first embodiment. Figure, 3rd
The figure is a sectional view of the second embodiment, and FIG. 4 is a sectional view and a bottom view of the third embodiment. In the figure, 1 is an inlet, 2 is an outlet, 5 is a diaphragm, 14 is a disk, 6 is a pilot valve hole,
7 is the diaphragm back chamber, 8 is the bleed hole, 81,
82 is a bent part, 86 is a groove, 83 is a hole from above,
84 indicates a hole from the side, and 85 indicates a hole from below.
Claims (1)
パイロツト弁孔を備え、かつ同ダイヤフラム弁体
に、入口側とダイヤフラム背室との間を連通する
ブリード孔を備えたパイロツト式ダイヤフラム弁
であつて、 該ブリード孔の一端と他端との間に、屈曲部を
少なくとも１つ備え、ブリード孔を通過する液体
の流動抵抗を大きくすることにより、 パイロツト弁孔よりブリード孔の流量が小さ
く、かつパイロツト弁孔の径がブリード孔の径と
同程度か小さくなるように構成したことを特徴と
するパイロツト式ダイヤフラム弁。 ２ 前記のダイヤフラム弁体は、ゴム等の軟質弾
性材料からなるダイヤフラムに、ダイヤフラム背
室側から剛性の強いデイスクとを重ねてなり、 前記のパイロツト弁孔およびブリード孔は、前
記デイスクに開けられていることを特徴とする特
許請求の範囲第１項記載のパイロツト式ダイヤフ
ラム弁。 ３ 前記のデイスクのダイヤフラム側の面に円弧
状の溝が形成され、該溝の一端に、ダイヤフラム
背室に開口する孔を有し、該溝の他端が、主弁孔
の入口側と連通していることを特徴とする特許請
求の範囲第２項記載のパイロツト式ダイヤフラム
弁。[Scope of Claims] 1. A pilot valve hole provided in the center of a diaphragm valve element that opens and closes the main valve hole, and a bleed hole provided in the diaphragm valve element to communicate between the inlet side and the diaphragm back chamber. type diaphragm valve, which includes at least one bent part between one end and the other end of the bleed hole, and increases the flow resistance of the liquid passing through the bleed hole, so that the bleed hole is closer to the pilot valve hole than the pilot valve hole. A pilot type diaphragm valve characterized in that the flow rate is small and the diameter of the pilot valve hole is equal to or smaller than the diameter of the bleed hole. 2. The diaphragm valve body is formed by stacking a diaphragm made of a soft elastic material such as rubber with a highly rigid disk from the back chamber side of the diaphragm, and the pilot valve hole and the bleed hole are formed in the disk. A pilot type diaphragm valve according to claim 1, characterized in that: 3. An arcuate groove is formed on the diaphragm side surface of the disk, one end of the groove has a hole that opens into the diaphragm back chamber, and the other end of the groove communicates with the inlet side of the main valve hole. A pilot type diaphragm valve according to claim 2, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24142683A JPS60132186A (en) | 1983-12-21 | 1983-12-21 | Diaphragm valve having pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24142683A JPS60132186A (en) | 1983-12-21 | 1983-12-21 | Diaphragm valve having pilot valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60132186A JPS60132186A (en) | 1985-07-15 |
| JPH0432272B2 true JPH0432272B2 (en) | 1992-05-28 |
Family
ID=17074120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24142683A Granted JPS60132186A (en) | 1983-12-21 | 1983-12-21 | Diaphragm valve having pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60132186A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61204825A (en) * | 1985-06-18 | 1986-09-10 | Victor Co Of Japan Ltd | Vertical magnetic recording medium |
| JPS61204821A (en) * | 1985-06-18 | 1986-09-10 | Victor Co Of Japan Ltd | Vertical magnetic recording medium |
| JPS61204822A (en) * | 1985-06-18 | 1986-09-10 | Victor Co Of Japan Ltd | Vertical magnetic recording medium |
| JPS61204824A (en) * | 1985-06-18 | 1986-09-10 | Victor Co Of Japan Ltd | Vertical magnetic recording medium |
| JPH0811987B2 (en) * | 1987-11-18 | 1996-02-07 | 株式会社日立製作所 | Water valve |
| JPH0718505B2 (en) * | 1988-02-16 | 1995-03-06 | テクノエクセル株式会社 | Pilot valve |
| JPH05187575A (en) * | 1992-06-22 | 1993-07-27 | Kanbayashi Seisakusho:Kk | Pilot valve |
| JP3533348B2 (en) * | 1999-09-16 | 2004-05-31 | Ｓｍｃ株式会社 | Dust collector valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5899580A (en) * | 1981-12-09 | 1983-06-13 | Hitachi Ltd | Feed valve |
-
1983
- 1983-12-21 JP JP24142683A patent/JPS60132186A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60132186A (en) | 1985-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |