JP3068671B2 - Gate valve - Google Patents
Gate valveInfo
- Publication number
- JP3068671B2 JP3068671B2 JP3195276A JP19527691A JP3068671B2 JP 3068671 B2 JP3068671 B2 JP 3068671B2 JP 3195276 A JP3195276 A JP 3195276A JP 19527691 A JP19527691 A JP 19527691A JP 3068671 B2 JP3068671 B2 JP 3068671B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve chamber
- fluid passage
- radius
- valve body
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ゲートバルブに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate valve.
【０００２】[0002]
【従来の技術】従来、合成樹脂製ゲートバルブとして、
実開昭５８−１６９２６８号公報のものが提案されてい
る。このゲートバルブは、流体通路を構成する主管部と
弁室を構成する分岐管部とを備えるとともに、流体通路
と弁室との間に、弁室側に向けてその内面がテーパー状
に拡開された弁室シール部を備え、かつ、流体通路の内
面に弁体シール部を備えた逆Ｔ字形状のフランジ接続タ
イプの合成樹脂製の弁箱と、この弁箱の弁室側から流体
通路に進入して、前記弁室シール部と弁体シール部とに
密着可能とされる弁体とを有して構成されている。そし
て、このゲートバルブにあっては、弁箱に設けられる弁
室シール部の横断面形状を真円形状とすることにより、
流体圧による弁室シール部の変形が周方向で均等となる
ようにし、弁締切時のシール性の向上を図っている。2. Description of the Related Art Conventionally, as a synthetic resin gate valve,
Japanese Utility Model Application Laid-Open No. 58-169268 has been proposed. The gate valve includes a main pipe part that forms a fluid passage and a branch pipe part that forms a valve chamber. The inner surface of the gate valve is tapered between the fluid passage and the valve chamber toward the valve chamber. Inverted T-shaped flange connection tap having a sealed valve chamber seal portion and a valve body seal portion on the inner surface of the fluid passage .
A synthetic resin valve box type, enters the fluid passage from the valve chamber side of the valve body, configured to have a valve body that is adherable to said valve chamber sealing portion and the valve body seal portion Have been. And in this gate valve, by making the cross-sectional shape of the valve chamber seal portion provided in the valve box into a perfect circle,
The deformation of the valve chamber seal portion due to the fluid pressure is made uniform in the circumferential direction, thereby improving the sealing performance when the valve is shut off.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
合成樹脂製ゲートバルブでは、弁室シール部の横断面形
状が真円形状とされているため、弁箱を構成している主
管部の両端フランジの面間寸法が長くなり、バルブが大
型化し、配管施工性が悪くなる。尚、特開昭４７−１３
７２９号公報に記載されている鋳鉄製ゲートバルブで
は、弁室シール部の横断形状を直線と円弧とを連続した
小判状としており、弁箱を構成している主管部の両端フ
ランジの面間寸法を短くすることを可能としている。但
し、この鋳鉄製ゲートバルブの考え方を合成樹脂製ゲー
トバルブに適用すると、流体圧による弁室シール部の変
形が周方向で不均等になり、弁締切時のシール性が不安
定になる。 However , in a conventional synthetic resin gate valve, the cross-sectional shape of the valve chamber seal portion is a perfect circle, so that the main part of the valve box is constituted.
The dimension between the faces of the flanges at both ends of the pipe becomes longer, the valve becomes larger, and the piping workability deteriorates. Incidentally, JP-A-47-13
The cast iron gate valve is described in 729 JP-cross shape of the valve chamber sealing portion has a straight line and the circular arc and a continuous oval shape, both ends off the main pipe portion constituting the valve body
It is possible to reduce the dimension between the surfaces of the flange . However, when the concept of the cast iron gate valve is applied to a synthetic resin gate valve, the deformation of the valve chamber seal portion due to fluid pressure becomes uneven in the circumferential direction, and the sealing performance when the valve is shut off becomes unstable.
【０００４】本発明は、合成樹脂製の弁箱を構成してい
る主管部の両端フランジの面間寸法を短くし、かつ、弁
締切時のシール性を向上することを目的とする。The present invention constitutes a synthetic resin valve box.
That the face-to-face length across the flange of the main pipe portion and short and aims to improve the sealing property during the valve shut-off.
【０００５】[0005]
【課題を解決するための手段】請求項１記載の本発明
は、流体通路を構成する主管部と弁室を構成する分岐管
部とを備えるとともに、流体通路と弁室との間に、弁室
側に向けてその内面がテーパー状に拡開された弁室シー
ル部を備え、かつ、流体通路の内面に弁体シール部を備
えた逆Ｔ字形状のフランジ接続タイプの合成樹脂製の弁
箱と、この弁箱の弁室側から流体通路に進入して、前記
弁室シール部と弁体シール部とに密着可能とされる弁体
とを有して構成されるゲートバルブにおいて、前記弁箱
に設けられる弁室シール部が、横断面にて、流体通路の
軸心に直交する仮想長軸上に位置する２点を中心とする
半径Ｒ１の円弧と、流体通路の軸心に平行で、かつ、前
記仮想長軸に直交する仮想短軸上に位置する２点を中心
とし、前記半径Ｒ１の２．５倍以上の半径を有する半径
Ｒ２の円弧とを連続してなる近似楕円形状をなし、か
つ、縦断面にて、１〜７度のテーパー形状をなすように
したものである。According to a first aspect of the present invention, there is provided a main pipe portion forming a fluid passage and a branch pipe forming a valve chamber.
Together and a part, between the fluid passage and the valve chamber, a valve chamber sealing portion inner surface thereof is expanded in a tapered shape toward the valve chamber side, and the valve body seal portion on the inner surface of the fluid passage a synthetic resin valve casing flange connection type inverted T-shape with a, enters the fluid passage from the valve chamber side of the valve casing, said <br/> valve chamber sealing portion and the valve body seal portion to the gate valve configured to have a valve body that is adherable, the valve chamber sealing portion provided in the valve body is at cross-section, of the fluid passageway
An arc of radius R1 centered on two points located on a virtual long axis perpendicular to the axis, and an arc parallel to the axis of the fluid passage and
Centered on two points located on the virtual short axis orthogonal to the virtual long axis
An approximate elliptical shape formed by connecting an arc having a radius R2 having a radius equal to or more than 2.5 times the radius R1 into an approximate elliptical shape, and a tapered shape having a vertical cross section of 1 to 7 degrees. It is made to make.
【０００６】[0006]
【作用】請求項１記載の本発明のゲートバルブにおいて
は、弁箱に設けられる弁室シール部の横断面形状が、流
体通路の軸心に直交する仮想長軸上に位置する２点を中
心とする半径Ｒ１の円弧と、流体通路の軸心に平行で、
かつ、前記仮想長軸に直交する仮想短軸上に位置する２
点を中心とし、前記半径Ｒ１の２．５倍以上の半径を有
する半径Ｒ２の円弧とが連続している近似楕円形状をな
しているので、弁室シール部の横断面形状が真円形状で
ある従来のゲートバルブに比して、弁室を構成している
分岐管部の流体の流れ方向に対応する外径を短くするこ
とができる。この結果、流体通路を構成している主管部
の両端フランジの面間寸法を短くしてバルブを小型化す
ることができる。また、配管施工性を向上できる。 In the gate valve according to the first aspect of the present invention,
Indicates that the cross-sectional shape of the valve chamber seal
Center two points located on the virtual long axis orthogonal to the axis of the body passage
An arc of radius R1 to be the center and the axis of the fluid passage,
And 2 located on a virtual short axis orthogonal to the virtual long axis.
With a radius of at least 2.5 times the radius R1 around the point
An approximate elliptical shape in which an arc having a radius R2
The cross section of the valve chamber seal is a perfect circle.
Compared to a conventional gate valve, it constitutes a valve chamber
Reduce the outer diameter of the branch pipe corresponding to the fluid flow direction.
Can be. As a result, the main pipe portion forming the fluid passage
The size of the valve is reduced by shortening the distance between the flanges at both ends
Can be In addition, pipe workability can be improved.
【０００７】尚、Ｒ２がＲ１の２．５倍より小さい場合
には、弁室シール部の横断面形状が真円形状に近づき、
弁箱を構成している主管部の両端フランジの面間寸法を
短くすることのメリットが得られない。When R2 is smaller than 2.5 times R1, the cross-sectional shape of the valve chamber seal portion approaches a perfect circle,
The advantage of reducing the distance between the faces of the flanges at both ends of the main pipe part constituting the valve box cannot be obtained.
【０００８】また、弁室シール部の横断面形状が近似楕
円形状であるとともに、弁室シール部の縦断面形状が１
〜７度のテーパーを有する形状とされているので、弁締
切時に、弁体と弁室シール部との間の全域にわたって均
等で大きな圧縮反発力を得て、シール性を向上できる。 Further, the approximation is cross-sectional shape of the valve chamber sealing portion elliptical der Rutotomoni, the longitudinal sectional shape of the valve chamber sealing portion 1
Since there is a shape having a 7-degree taper, when the valve deadline, to obtain large compression repulsive force equalizing <br/> like over the entire region between the valve member and the valve chamber sealing portion, the sealing property Can be improved.
【０００９】尚、弁室シール部の横断面形状が完全な楕
円形状である場合には、弁室を構成している分岐管の長
軸方向の肉厚が短軸方向の肉厚より大となる不均等を生
じ、弁室シール部の周方向に均等な圧縮反発力を得るこ
とができず、流体圧による弁室シール部の変形が周方向
で不均等となり、シール性が不安定となる。When the cross-sectional shape of the valve chamber seal portion is completely elliptical, the thickness of the branch pipe constituting the valve chamber in the major axis direction is larger than that in the minor axis direction. As a result, uniform compression repulsion cannot be obtained in the circumferential direction of the valve chamber seal portion, and deformation of the valve chamber seal portion due to fluid pressure becomes uneven in the circumferential direction, and the sealing performance becomes unstable. .
【００１０】[0010]
【実施例】図１は本発明のゲートバルブを構成する弁箱
を示す平面図、図２は図１の弁箱 の要部を示す部分縦断
面図である。図３は本発明のゲートバルブを示す模式図
であり、（Ａ）は部分断面正面図、（Ｂ）は部分断面側
面図である。 1 shows a valve box constituting a gate valve according to the present invention.
FIG. 2 is a partial longitudinal section showing a main part of the valve box of FIG.
FIG. FIG. 3 is a schematic view showing the gate valve of the present invention.
(A) is a partial sectional front view, and (B) is a partial sectional side.
FIG.
【００１１】ゲートバルブ１０は、合成樹脂製のもので
あり、図３に示す如く、弁箱１１、ボンネット１２、ス
トッパ１３、弁棒１４、弁体１５、操作部材１６とを有
して構成されている。The gate valve 10 is made of a synthetic resin, and includes a valve box 11, a bonnet 12, a stopper 13, a valve rod 14, a valve body 15, and an operation member 16, as shown in FIG. Tei Ru.
【００１２】弁箱１１は、正面視逆Ｔ字形状の合成樹脂
製のものであり、ボルト１７によってボンネット１２、
ストッパ１３と一体化され、流体通路１８を構成してい
る主管部１８Ａと、弁室１９を構成している分岐管部１
９Ａとを備えている。また、弁箱１１は、流体通路１８
と弁室１９との間に、弁室１９側に向けてテーパー状に
拡開された弁室シール部２１を備え、かつ、流体通路１
８の内面に弁体シール部２２を備えている。主管部１８
Ａの両端および分岐管部１９Ａの上方開口端にはそれぞ
れフランジ部１８１Ａ、１９１Ａが一体に設けられてい
る。 The valve box 11 is made of a synthetic resin having an inverted T-shape when viewed from the front.
The fluid passage 18 is formed integrally with the stopper 13.
Main pipe 18A and branch pipe 1 constituting valve chamber 19
9A . Further, the valve box 11 is provided with a fluid passage 18.
Between the valve chamber 19 and the valve chamber 19, the valve chamber seal portion 21 is tapered toward the valve chamber 19 side, and the fluid passage 1 is provided.
8 the inner surface of the Ru Tei includes a valve body seal part 22. Main pipe 18
A at both ends of A and the upper open end of the branch pipe portion 19A.
Flange portions 181A and 191A are integrally provided.
You.
【００１３】弁棒１４は、中間フランジ部をボンネット
１２とストッパ１３との間に保持されて、弁箱１１に対
し回転はするが、自軸方向には移動しない状態で結合さ
れ、弁箱１１の弁室１９内に位置する部分に弁体用の雄
ねじ部２３を備えている。[0013] The valve stem 14 is held to the intermediate flange between the bonnet 12 and the stopper 13, although the rotation relative to the valve box 11, the self-axially coupled in a state that does not move, the valve body 11 A male screw portion 23 for a valve body is provided in a portion located inside the valve chamber 19 of the first embodiment.
【００１４】弁体１５はその合成樹脂製本体部２４に、
上記弁棒１４の弁体用の雄ねじ部２３に螺着される雌ね
じ部２５を備えている。また、弁体１５は、弁箱１１の
弁室１９に臨む内面における、弁棒軸方向に沿って設け
られる案内溝２６にスライド可能に係合する弁体ガイド
２７を備えている。これにより、弁体１５は、弁箱１１
に対して弁棒の軸方向に移動はするが、回転はしない状
態で支持される。即ち、弁体１５は弁棒１４の回転時に
弁棒の軸方向に上下動して弁箱１１の流体通路１８は開
閉し、閉止時には弁室１９側から流体通路１８に進入
し、上記弁室シール部２１と弁体シール部２２とに密着
可能とされている。The valve body 15 is in its plastic body portion 24,
Ru Tei comprising a female I <br/> Ji portion 25 which is screwed to the male screw portion 23 for the valve body of the valve stem 14. Further, the valve body 15, the inner surface facing the valve chamber 19 of the valve box 11, Ru Tei includes a valve body guide 27 which slidably engage the guide groove 26 provided along the Benbojiku direction. As a result, the valve element 15 is
Is moved in the axial direction of the valve stem, but is supported without rotating. That is, the valve element 15 moves up and down in the axial direction of the valve rod when the valve rod 14 rotates, and the fluid passage 18 of the valve box 11 opens and closes, and when closed, enters the fluid passage 18 from the valve chamber 19 side. Ru Tei is possible close contact with the sealing portion 21 and the valve body seal part 22.
【００１５】操作部材であるハンドル１６は、ボンネッ
ト１２の上面から上方に突出した弁棒１４の上端部にナ
ット２８で固定されている。[0015] The handle 16 is an operation member, bonnet
Ru Tei is fixed by a nut 28 on the end portion on the valve stem 14 projecting upwardly from the upper surface of bets 12.
【００１６】そして、本発明のゲートバルブ１０におい
ては、図１に示すように、弁箱１１に設けられる弁室シ
ール部２１が、横断面にて、流体通路１８の軸心に直交
する仮想長軸Ｌ１上に位置する２点（ｒ１，ｒ１）を中
心とする半径Ｒ１の円弧と、流体通路１８の軸心に平行
で、かつ、仮想長軸Ｌ１に直交する仮想短軸Ｓ１上に位
置する２点（ｒ２，ｒ２）を中心とし、半径Ｒ１の２．
５倍以上の半径を有する半径Ｒ２の円弧とを連続してな
る近似楕円形状をなし、かつ、図２に示すように、縦断
面にて、１〜７度のテーパー形状をなすものとされてい
る。 And, in the gate valve 10 of the present invention,
As shown in FIG. 1, the valve chamber seal portion 21 provided in the valve box 11 has a cross section orthogonal to the axis of the fluid passage 18.
Two points (r1, r1) located on the virtual long axis L1
An arc of radius R1 to heart, parallel to the axis of the fluid passage 18
And on a virtual short axis S1 orthogonal to the virtual long axis L1.
With two points (r2, r2) at the center and radius R1 of 2.
It has an approximate elliptical shape formed by connecting an arc of a radius R2 having a radius of five times or more, and has a tapered shape of 1 to 7 degrees in a longitudinal section as shown in FIG. I have.
【００１７】次に、上記実施例の作用について説明す
る。（１） 弁室シール部２１の横断面形状が近似楕円形状で
あるから、同部の横断面形状が真円形状である従来のゲ
ートバルブに比して、弁室１９を構成している分岐管部
１９Ａの流体の流れ方向に対応する外径が短くなる。こ
の結果、流体通路１８を構成している主管部１８Ａの両
端フランジ部１８１Ａ，１８１Ａ間の面間寸法、つま
り、主管部１８Ａの長さを短くしてバルブを小型化する
ことができる。 また、主管部１８Ａの長さを変えないの
であれば、主管部１８Ａの管頂部において、弁室１９を
構成している分岐管部１９Ａの外面と主管部１８Ａの両
端フランジ部１８１Ａ，１８１Ａの裏面との隙間が従来
のゲートバルブに比して大きくなるので、管路内にゲー
トバルブをボルト・ナットにてフランジ接続する際、既
製品のボルトを用いてフランジ接続を行え、配管施工性
が良好である。 Next, the operation of the above embodiment will be described. (1) Since the cross-sectional shape of the valve chamber seal portion 21 is an approximate elliptical shape , the conventional cross-sectional shape of the portion is a perfect circle.
The branch pipe portion that constitutes the valve chamber 19 as compared with the port valve
The outer diameter corresponding to the flow direction of the 19A fluid becomes shorter. This
As a result, both of the main pipe portions 18A constituting the fluid passage 18 are
The distance between the end flanges 181A, 181A,
To shorten the length of the main pipe portion 18A to downsize the valve.
be able to. Also, do not change the length of the main pipe 18A.
Then, at the top of the main pipe portion 18A, the valve chamber 19 is
Both the outer surface of the branch pipe portion 19A and the main pipe portion 18A
The gap between the end flanges 181A and 181A is
Gate valve is larger than the
When connecting the valve to the flange with bolts and nuts,
Flange connection can be performed using bolts of the product, making piping work
Is good.
【００１８】（２）弁室シール部２１の横断面形状が近
似楕円形状であるとともに、同部の縦断面形状が１〜７
度のテーパー形状であるから、弁締切時に、弁体１５と
弁室シール部２１との間の全域にわたって均等で大きな
圧縮反発力を得て、シール性を向上できる。[0018] (2) valve chamber cross-sectional shape approximate elliptical shape der Rutotomoni of the seal portion 21, vertical section of the same part is 1-7
Because it is time the tapered shape, when the valve deadline, to obtain large compression repulsive force evenly over the entire area between the valve body 15 and the valve chamber sealing portion 21, thereby improving the sealing property.
【００１９】[0019]
【発明の効果】請求項１記載の本発明のゲートバルブに
おいては、弁室シール部の横断面形状が半径Ｒ１の円弧
と、この円弧の２．５倍以上の半径を有する半径Ｒ２の
円弧とが連続している近似楕円形状をなしているので、
従来のものに比して、弁室を構成している分岐管部の流
体の流れ方向に対応する外径を短くすることができ、主
管部の両端フランジの面間寸法を短くしてバルブを小型
化することができる。また、配管施工性を向上できる。
また、弁室シール部の横断面形状が近似楕円形状である
とともに、弁室シール部の縦断面形状が１〜７度のテー
パー形状をなしているので、弁締切時に、弁体と弁室シ
ール部との間の全域にわたって均等で大きな圧縮反発力
を得て、シール性を向上できる。 According to the gate valve of the present invention described in claim 1,
In this case, the cross-sectional shape of the valve chamber seal portion is an arc having a radius R1.
And a radius R2 having a radius of 2.5 times or more of this arc.
Since it has an approximate elliptical shape with a continuous arc,
Compared to the conventional one, the flow in the branch pipe that constitutes the valve chamber
The outer diameter corresponding to the body flow direction can be shortened,
Smaller valve by shortening the space between the flanges at both ends of the pipe
Can be In addition, pipe workability can be improved.
Also, the cross-sectional shape of the valve chamber seal portion is an approximate elliptical shape
At the same time, the vertical section of the valve chamber seal
The valve body and valve chamber seal are closed when the valve is shut off.
Uniform and large compression repulsion over the entire area between
And sealing properties can be improved.
【図１】本発明のゲートバルブを構成する弁箱を示す平
面図である。FIG. 1 is a plan view showing a valve box constituting a gate valve of the present invention .
【図２】図１の弁箱の要部を示す部分縦断面図である。FIG. 2 is a partial longitudinal sectional view showing a main part of the valve box of FIG.
【図３】本発明のゲートバルブを示す模式図である。FIG. 3 is a schematic view showing a gate valve of the present invention .
１０ ゲートバルブ １１ 弁箱 １５ 弁体 １８ 流体通路１８Ａ 主管部 １８１Ａ，１９１Ａ フランジ部 １９ 弁室１９Ａ 分岐管部 ２１ 弁室シール部 ２２ 弁体シール部Ｌ１ 仮想長軸 Ｓ１ 仮想短軸 ｒ１，ｒ２ 円弧の中心 Reference Signs List 10 gate valve 11 valve box 15 valve body 18 fluid passage 18A main pipe section 181A, 191A flange section 19 valve chamber 19A branch pipe section 21 valve chamber seal section 22 valve body seal section L1 virtual long axis S1 virtual short axis r1, r2 arc center
Claims (1)
する分岐管部とを備えるとともに、流体通路と弁室との
間に、弁室側に向けてその内面がテーパー状に拡開され
た弁室シール部を備え、かつ、流体通路の内面に弁体シ
ール部を備えた逆Ｔ字形状のフランジ接続タイプの合成
樹脂製の弁箱と、この弁箱の弁室側から流体通路に進入
して、前記弁室シール部と弁体シール部とに密着可能と
される弁体とを有して構成されるゲートバルブにおい
て、前記 弁箱に設けられる弁室シール部が、横断面にて、流
体通路の軸心に直交する仮想長軸上に位置する２点を中
心とする半径Ｒ１の円弧と、流体通路の軸心に平行で、
かつ、前記仮想長軸に直交する仮想短軸上に位置する２
点を中心とし、前記半径Ｒ１の２．５倍以上の半径を有
する半径Ｒ２の円弧とを連続してなる近似楕円形状をな
し、かつ、縦断面にて、１〜７度のテーパー形状をなし
ていることを特徴とするゲートバルブ。1. A main pipe part and a valve chamber constituting a fluid passage are constituted.
Together and a branch pipe portion which, between the fluid passage and the valve chamber, a valve chamber sealing portion inner surface thereof is expanded in a tapered shape toward the valve chamber side and a valve on the inner surface of the fluid passage and inverted T-shaped flange connection type of the synthetic resin valve box having a body seal section, from the valve chamber side of the valve body enters the fluid passage, the said valve chamber sealing portion and the valve body seal portion in the gate valve configured to have a valve body that is adherable, the valve chamber sealing portion provided in the valve body is at cross-flow
Center two points located on the virtual long axis orthogonal to the axis of the body passage
An arc of radius R1 to heart, parallel to the axis of the fluid passage,
And 2 located on a virtual short axis orthogonal to the virtual long axis.
With a radius of at least 2.5 times the radius R1 around the point
No approximate elliptical shape formed by continuously and arc having a radius R2 that, and, at longitudinal section, Shi Na 1-7 ° taper
Gate valve, characterized in that are.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3195276A JP3068671B2 (en) | 1991-08-05 | 1991-08-05 | Gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3195276A JP3068671B2 (en) | 1991-08-05 | 1991-08-05 | Gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0539873A JPH0539873A (en) | 1993-02-19 |
| JP3068671B2 true JP3068671B2 (en) | 2000-07-24 |
Family
ID=16338471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3195276A Expired - Lifetime JP3068671B2 (en) | 1991-08-05 | 1991-08-05 | Gate valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3068671B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102077671B1 (en) * | 2018-05-01 | 2020-02-14 | 스마트유압기계주식회사 | Frame for oil hydraulic press |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007092507A (en) * | 2005-09-05 | 2007-04-12 | Hitachi Zosen Corp | Jet flow gate |
-
1991
- 1991-08-05 JP JP3195276A patent/JP3068671B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102077671B1 (en) * | 2018-05-01 | 2020-02-14 | 스마트유압기계주식회사 | Frame for oil hydraulic press |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0539873A (en) | 1993-02-19 |
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