JP2719477B2 - Connection structure between hydraulic pipe fittings and hydraulic equipment - Google Patents
Connection structure between hydraulic pipe fittings and hydraulic equipmentInfo
- Publication number
- JP2719477B2 JP2719477B2 JP4076032A JP7603292A JP2719477B2 JP 2719477 B2 JP2719477 B2 JP 2719477B2 JP 4076032 A JP4076032 A JP 4076032A JP 7603292 A JP7603292 A JP 7603292A JP 2719477 B2 JP2719477 B2 JP 2719477B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic device
- screw
- pipe joint
- connection
- 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
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高圧油圧機器の配管に
適用される油圧配管用管継手と油圧機器との接続構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a hydraulic pipe fitting and a hydraulic device which are applied to piping of a high-pressure hydraulic device.
【０００２】[0002]
【従来の技術】図７は、従来の座付き９０°型エルボを
示したものである。図示のように、エルボ本体２１は一
端外周には配管との接続のためのネジ部２２を、他端外
周には油圧機器２７への取付けのためのネジ部２３を備
えており、油圧機器２７に対する取付けは、取付けネジ
部２３を油圧機器２７の接続ポート２８に所定位置まで
ねじ込んで配管接続端部の方向を定めてから、ロックナ
ット２４によりバックアップワッシャ２５を締め付ける
ことにより行う。そして、このロックナット２４の締め
付けによりＯリング２６が押し潰されてエルボ本体２１
の外周面と、バックアップワッシャ２５と、油圧機器２
７のポート内周面とに密着してシールするようになって
いる。2. Description of the Related Art FIG. 7 shows a conventional 90 ° elbow with a seat. As shown in the figure, the elbow main body 21 is provided with a screw portion 22 on one end outer periphery for connection to a pipe, and a screw portion 23 on the other outer periphery for attachment to a hydraulic device 27. Is mounted by screwing the mounting screw portion 23 into the connection port 28 of the hydraulic device 27 to a predetermined position to determine the direction of the pipe connection end, and then tightening the backup washer 25 with the lock nut 24. Then, the O-ring 26 is crushed by the tightening of the lock nut 24 and the elbow main body 21 is pressed.
Outer peripheral surface, backup washer 25 and hydraulic device 2
The seal 7 is in close contact with the port inner peripheral surface.
【０００３】また、図８は従来のニップルの場合を示し
たものである。図示のように、ニップル本体２９は一端
外周に配管との接続のためのネジ部３０を、他端外周に
油圧機器２７への取付けのためのネジ部３１を備えてお
り、油圧機器２７に対する取付けは、油圧機器２７の接
続ポート２８に取付けネジ部３１をねじ込むことにより
行われ、そしてシールはニップル本体２９に形成したシ
ール面３２と油圧機器２７の接続ポート２８の口縁に形
成したシート面３３との間に介在されたＯリング３４に
より行われる。FIG. 8 shows a case of a conventional nipple. As shown in the figure, the nipple body 29 is provided with a screw portion 30 on one end outer circumference for connection to a pipe and a screw portion 31 on the other outer circumference for mounting to the hydraulic device 27. Is performed by screwing a mounting screw portion 31 into the connection port 28 of the hydraulic device 27, and the seal is formed on the sealing surface 32 formed on the nipple body 29 and the seat surface 33 formed on the edge of the connection port 28 of the hydraulic device 27. Is performed by an O-ring 34 interposed therebetween.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上述したよ
うに、従来の管継手の場合、油圧機器２７に対して固定
の形態で取付けられる。従って、ホースの取り回しや動
き、振動等を十分に考慮してホースとの接続方向を定め
て締め付けないと、ホースの振動等によりホースや管継
手に緩みが生じて油漏れを起こす可能性がある。また、
図７に示された座付きエルボの場合、バックアップワッ
シャ２５の移動性とＯリング２６はみ出し現象の関係か
ら、ワッシャ内径及びエルボ本体２１のＯリング溝外径
の加工精度を相当に高めなければならないという製作上
の難点がある。However, as described above, in the case of the conventional pipe joint, it is fixed to the hydraulic equipment 27 in a fixed form. Therefore, unless the connection direction with the hose is determined in consideration of the handling, movement, vibration, etc. of the hose, the hose may loosen due to vibration of the hose and cause oil leakage. . Also,
In the case of the elbow with a seat shown in FIG. 7, the machining accuracy of the inner diameter of the washer and the outer diameter of the O-ring groove of the elbow main body 21 must be considerably increased due to the relationship between the mobility of the backup washer 25 and the protrusion of the O-ring 26. There are manufacturing difficulties.
【０００５】そこで本発明は、上述の問題に鑑み、取付
け後において、ホース等の振動等を吸収することの可能
な管継手と油圧機器との接続構造を提供することを、解
決すべき技術的課題とする。In view of the above problems, the present invention has been made to solve the problem of providing a connection structure between a pipe joint and a hydraulic device capable of absorbing vibrations of a hose or the like after installation. Make it an issue.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明は次のように構成したものである。すなわ
ち、本発明の油圧配管用管継手と油圧機器との接続構造
は、一端部に配管用の接続部を備えた管継手の他端部外
周には端末側にかけて環状の逃げ溝、雄ネジ、シート面
の順序で段階的に形成する一方、油圧機器に形成した接
続ポート内周には端末側から雌ネジ、環状の逃げ溝、シ
ート面の順序で段階的に形成し、前記管継手の雄ネジを
油圧機器の雌ネジにねじ込むことで前記両シート面に介
在されたシール部材が加圧され、ねじ込み完了状態では
雄ネジが油圧機器の逃げ溝に、雌ネジが管継手の逃げ溝
にそれぞれ遊回動可能に嵌合される構成としたことを特
徴としている。Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, the connection structure between the hydraulic pipe fitting and the hydraulic device according to the present invention includes a ring-shaped relief groove, a male screw, and a terminal side on the outer periphery of the other end of the pipe joint having a pipe connection part at one end. On the inner periphery of the connection port formed in the hydraulic device, a female screw, an annular relief groove, and a seat surface are formed stepwise in this order from the terminal side, and the male fitting of the pipe joint is formed. By screwing the screw into the female screw of the hydraulic device, the seal member interposed between the two seat surfaces is pressurized, and when the screwing is completed, the male screw is in the relief groove of the hydraulic device, and the female screw is in the relief groove of the pipe joint, respectively. It is characterized in that it is configured to be freely rotatable.
【０００７】[0007]
【作用】上記のように構成された本発明に係る油圧配管
用管継手と油圧機器との接続構造においては、管継手の
雄ネジを油圧機器の雌ネジにねじ込むと、両部材のＯリ
ングシート面間に介在されたＯリングが押し潰され、そ
してねじ込み完了時点ではＯリングが適正潰し代となり
シート面をシールするとともに、両ネジは対応する逃げ
溝内に入り込んで遊回動可能に嵌合する。従って、管継
手は油圧機器に対して自由回転可能な状態で取付けられ
る。つまり、取付け後の管継手は、その配管接続端部の
向きに自由性が与えられことになる。In the connection structure between the hydraulic pipe fitting and the hydraulic device according to the present invention, the male thread of the pipe fitting is screwed into the female screw of the hydraulic device, so that the O-ring sheet of both members is formed. The O-ring interposed between the surfaces is crushed, and at the time of completion of the screwing, the O-ring becomes a proper crushing margin and seals the seat surface, and both screws enter the corresponding clearance grooves so as to be rotatably fitted. I do. Therefore, the pipe joint is mounted so as to be freely rotatable with respect to the hydraulic equipment. That is, the installed pipe joint is given flexibility in the direction of the pipe connection end.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面に基づいて具体
的に説明する。まず、図１及び図２に示す実施例につい
て説明する。本実施例はエルボを対象としたものであ
り、管継手としてのエルボ本体１は、図２に示すよう
に、配管接続端部の外周には配管接続用のネジ部２を備
え、油圧機器８への取付側端部の外周には、端末から中
側にかけて、小径部３、シール部材用のテーパ状のシー
ト面４、大径部５、該大径部５よりやや大径の雄ネジ
６、そして該雄ネジ６より小径の環状のネジ逃げ溝７を
上記順序で備えた構造となっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. First, the embodiment shown in FIGS. 1 and 2 will be described. This embodiment is directed to an elbow, and an elbow main body 1 as a pipe joint is provided with a thread 2 for pipe connection on the outer periphery of a pipe connection end as shown in FIG. On the outer periphery of the end on the mounting side, from the end to the middle, a small-diameter portion 3, a tapered seat surface 4 for a sealing member, a large-diameter portion 5, and a male screw 6 slightly larger in diameter than the large-diameter portion 5. And, it has a structure provided with an annular screw escape groove 7 having a diameter smaller than that of the male screw 6 in the above order.
【０００９】一方、油圧機器８（例えば、オイルコント
ロールバルブ等の各種バルブ類や油圧シリンダ等の油圧
アクチュエータ）には、図２に示すように、管継手取付
用の円形の接続ポート９が形成され、この接続ポート９
の内周には、口縁から中側にかけて、前記雄ネジ６に螺
合する雌ネジ１０、該雌ネジ１０より大径のネジ逃げ溝
１１、前記大径部５及び小径部３が嵌合可能な段付き孔
１２、そしてこの段付き孔１２の段差面にて形成される
シール部材用のシート面１３を上記順序で備えた構造と
なっている。On the other hand, the hydraulic device 8 (for example, various valves such as an oil control valve and a hydraulic actuator such as a hydraulic cylinder) has a circular connection port 9 for fitting a pipe joint as shown in FIG. , This connection port 9
A female screw 10 screwed into the male screw 6, a screw escape groove 11 having a diameter larger than that of the female screw 10, the large-diameter portion 5 and the small-diameter portion 3 are fitted to the inner periphery of the inner thread from the lip to the middle. The structure is provided with a possible stepped hole 12 and a sheet surface 13 for a sealing member formed by a step surface of the stepped hole 12 in the above order.
【００１０】しかして、上記のように構成されたエルボ
本体１の油圧機器８に対する取付けは以下の如く実施さ
れる。図１に示すように、まず、エルボ本体１のテーパ
状のシート面４にシール部材として、例えばＯリング１
４を嵌合したのち、エルボ本体１の雄ネジ６を油圧機器
８の雌ネジ１０にねじ込む。このねじ込みにより小径部
３及び大径部５が段付き孔１２に嵌入し、Ｏリング１４
は段付き孔１２の段差面、つまりシート面１３に押し付
けられる。そして、ねじ込みの最終段階、つまりねじ込
み完了時点でＯリング１４はテーパ状のシート面４と段
差面からなるシート面１３とで作られる断面三角溝内に
おいて適正潰し代で圧縮される。The mounting of the elbow body 1 configured as described above to the hydraulic device 8 is performed as follows. As shown in FIG. 1, first, for example, an O-ring 1 is provided on a tapered seat surface 4 of an elbow main body 1 as a sealing member.
After fitting 4, male screw 6 of elbow main body 1 is screwed into female screw 10 of hydraulic device 8. The small diameter portion 3 and the large diameter portion 5 are fitted into the stepped holes 12 by this screwing, and the O-ring 14
Is pressed against the step surface of the stepped hole 12, that is, the sheet surface 13. Then, at the final stage of screwing, that is, at the time of completion of screwing, the O-ring 14 is compressed with an appropriate crushing allowance in a triangular groove having a cross section formed by the tapered seat surface 4 and the seat surface 13 formed of a step surface.
【００１１】一方、ねじ込み完了により雄ネジ６は油圧
機器８のネジ逃げ溝１１内に、雌ネジ１０はエルボ本体
１のネジ逃げ溝７内にそれぞれ入り込み遊回動可能に嵌
合する。かくして、エルボ本体１は油圧機器８の接続ポ
ート９に対してＯリング１４によるシール確保状態下で
自由回転可能に結合される。ただし、ここでいう自由回
転可能とは、軽微な外力で回転し得るということではな
く、Ｏリング１４の反力に打ち勝つような外力により回
動し得ると言う意味である。On the other hand, when the screwing is completed, the male screw 6 enters the screw escape groove 11 of the hydraulic device 8 and the female screw 10 enters the screw escape groove 7 of the elbow main body 1 so as to be freely rotatable. Thus, the elbow main body 1 is freely rotatably coupled to the connection port 9 of the hydraulic device 8 with the O-ring 14 ensuring the seal. However, being freely rotatable here means not being able to rotate with a small external force, but being able to rotate with an external force that overcomes the reaction force of the O-ring 14.
【００１２】このように、本実施例に係る管継手と油圧
機器との接続構造によれば、油圧機器８に取付けられた
管継手としてのエルボ本体１は、配管接続端部の向きに
自由性が得られることから、接続配管としてのホースに
曲げや捩じれを生じさせずに容易に接続することが可能
となり、しかもホース側からの振動をエルボ本体１の自
由回動により吸収することが可能となる。また、上述の
ような構造としたことにより、従来のバックアップワッ
シャ及びロックナットを省略できるため、バックアップ
ワッシャ方式に見受けられるＯリングのはみ出し現象等
を考慮する必要がなくなり、製作面での容易化が図られ
る。As described above, according to the connection structure between the pipe joint and the hydraulic device according to the present embodiment, the elbow body 1 as the pipe joint attached to the hydraulic device 8 is free in the direction of the pipe connection end. Is obtained, it is possible to easily connect the hose as a connection pipe without causing bending or twisting, and it is possible to absorb vibration from the hose side by free rotation of the elbow main body 1. Become. In addition, since the conventional backup washer and lock nut can be omitted by adopting the above-described structure, it is not necessary to consider the protruding phenomenon of the O-ring, which is observed in the backup washer system, and simplification in manufacturing can be achieved. It is planned.
【００１３】つぎに、本発明の他の実施例について説明
する。図３及び図４に示す実施例はシール部を、エルボ
本体１側に形成されるシート面４ａを平面としたＯリン
グフェースシール方式としたものである。すなわち、前
述した実施例の三角溝によるＯリングシール方式を矩形
の溝によるＯリングフェースシール方式に変更したもの
であって、その他の構成については前述した実施例と同
一であるから、同一符号を付して説明を省略する。従っ
て、この実施例の場合もエルボ本体１は油圧機器８に対
して自由回転可能に取付けられ、接続配管側からの振動
吸収機能が得られる等、前述の実施例と同様の作用効果
が得られる。なお、図５及び図６に示したものは、それ
ぞれ管継手としてニップル１５に適用した場合であり、
油圧機器８に対する接続部の構造自体は前述した実施例
のエルボの場合と全く同一であるから、その構造につい
ては同一符号を付して説明を省略する。ただし、図５の
ニップル１５の場合は、三角溝によるシール方式であ
り、図６のニップル１５は矩形の溝によるフェースシー
ル方式である。Next, another embodiment of the present invention will be described. In the embodiment shown in FIGS. 3 and 4, the seal portion is an O-ring face seal system in which the seat surface 4a formed on the side of the elbow main body 1 is flat. That is, the O-ring sealing method using the triangular grooves in the above-described embodiment is changed to the O-ring face sealing method using the rectangular grooves. Other configurations are the same as those in the above-described embodiment. The description is omitted here. Therefore, also in this embodiment, the elbow main body 1 is freely rotatable with respect to the hydraulic device 8, and a function of absorbing vibration from the connection pipe side is obtained. . FIGS. 5 and 6 show cases in which the nipple 15 is applied as a pipe joint, respectively.
Since the structure of the connecting portion to the hydraulic device 8 is exactly the same as that of the elbow of the above-described embodiment, the same reference numeral is given to the structure and the description is omitted. However, in the case of the nipple 15 in FIG. 5, a sealing method using a triangular groove is used, and the nipple 15 in FIG. 6 is a face sealing method using a rectangular groove.
【００１４】[0014]
【発明の効果】以上詳述したように、本発明の接続部構
造によれば、油圧機器に取付けられた管継手はホース側
からの振動等に対する吸収機能を有するため、振動等に
原因しての弛みを防止して、油漏れを回避することがで
きる。また、従来必要であったバックアップワッシャや
ロックナットが不要となって、部品点数の削減が図ら
れ、機器への装着が容易化されるとともに、コストの低
減が達成される。さらにまた、バックアップワッシャの
内径やＯリング溝の外径の精度上の問題を考慮する必要
がなくなり、製作工程上の合理化が見込まれる。As described above in detail, according to the connecting portion structure of the present invention, the pipe joint attached to the hydraulic device has a function of absorbing vibration and the like from the hose side. Can be prevented, and oil leakage can be avoided. In addition, a backup washer and a lock nut, which were conventionally required, are not required, so that the number of parts can be reduced, the mounting to the device is facilitated, and the cost can be reduced. Furthermore, it is not necessary to consider the problem of accuracy of the inner diameter of the backup washer and the outer diameter of the O-ring groove.
【図１】本発明の実施例に係る油圧配管用管継手と油圧
機器との接続構造を組付け状態で示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a connection structure between a hydraulic pipe fitting and a hydraulic device according to an embodiment of the present invention in an assembled state.
【図２】図１の接続構造を分解状態で示す縦断面図であ
る。FIG. 2 is a longitudinal sectional view showing the connection structure of FIG. 1 in an exploded state.
【図３】本発明の他の実施例に係る油圧配管用管継手と
油圧機器との接続構造を組付け状態で示す縦断面図であ
る。FIG. 3 is a longitudinal sectional view showing a connection structure between a hydraulic pipe fitting and a hydraulic device according to another embodiment of the present invention in an assembled state.
【図４】図３の接続構造を分解状態で示す縦断面図であ
る。4 is a longitudinal sectional view showing the connection structure of FIG. 3 in an exploded state.
【図５】ニップルに適用した他の実施例の縦断面図であ
る。FIG. 5 is a longitudinal sectional view of another embodiment applied to a nipple.
【図６】同じくニップルに適用したさらに他の実施例の
縦断面図である。FIG. 6 is a longitudinal sectional view of still another embodiment applied to a nipple.
【図７】従来の油圧機器に対する座付きエルボの取付構
造を示す縦断面図である。FIG. 7 is a longitudinal sectional view showing a mounting structure of a seated elbow to a conventional hydraulic device.
【図８】従来の油圧機器に対するニップルの取付構造を
示す縦断面図である。FIG. 8 is a longitudinal sectional view showing a structure for mounting a nipple to a conventional hydraulic device.
１…エルボ本体 ２…配管接続用の
ネジ部 ４…シート面 ６…雄ネジ ７…ネジ逃げ溝 ８…油圧機器 ９…接続ポート １０…雌ネジ １１…ネジ逃げ溝 １３…シート面 １４…Ｏリング １５…ニップルDESCRIPTION OF SYMBOLS 1 ... Elbow main body 2 ... Thread part for piping connection 4 ... Seat surface 6 ... Male screw 7 ... Screw relief groove 8 ... Hydraulic equipment 9 ... Connection port 10 ... Female screw 11 ... Screw relief groove 13 ... Seat surface 14 ... O-ring 15 ... Nipple
───────────────────────────────────────────────────── フロントページの続き (72)発明者 木村 實 東京都大田区大森東２−14−12 トキワ 精機株式会社内 (56)参考文献 特開 平４−119285（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Minoru Kimura 2-14-12 Omorihigashi, Ota-ku, Tokyo Tokiwa Seiki Co., Ltd. (56) References JP-A-4-119285 (JP, A)
Claims (1)
の他端部外周には端末側にかけて環状の逃げ溝、雄ネ
ジ、シート面の順序で段階的に形成する一方、油圧機器
に形成した接続ポート内周には端末側から雌ネジ、環状
の逃げ溝、シート面の順序で段階的に形成し、前記管継
手の雄ネジを油圧機器の雌ネジにねじ込むことで前記両
シート面に介在されたシール部材が加圧され、ねじ込み
完了状態では雄ネジが油圧機器の逃げ溝に、雌ネジが管
継手の逃げ溝にそれぞれ遊回動可能に嵌合される構成と
した油圧配管用管継手と油圧機器との接続構造。An annular relief groove, a male screw, and a seat surface are formed stepwise on the outer periphery of the other end of a pipe joint having a connection portion for piping at one end in the order of the terminal side, while hydraulic equipment is provided. A female screw, an annular relief groove, and a seat surface are formed stepwise from the terminal side on the inner periphery of the connection port formed in the order, and the male screw of the pipe joint is screwed into the female screw of a hydraulic device to form the two seats. Hydraulic piping in which the seal member interposed in the surface is pressurized, and when the screwing is completed, the male screw is loosely fitted in the relief groove of the hydraulic device and the female screw is loosely fitted in the relief groove of the pipe joint. Connection structure between pipe fittings and hydraulic equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4076032A JP2719477B2 (en) | 1992-02-26 | 1992-02-26 | Connection structure between hydraulic pipe fittings and hydraulic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4076032A JP2719477B2 (en) | 1992-02-26 | 1992-02-26 | Connection structure between hydraulic pipe fittings and hydraulic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05240378A JPH05240378A (en) | 1993-09-17 |
| JP2719477B2 true JP2719477B2 (en) | 1998-02-25 |
Family
ID=13593485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4076032A Expired - Lifetime JP2719477B2 (en) | 1992-02-26 | 1992-02-26 | Connection structure between hydraulic pipe fittings and hydraulic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2719477B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07121512B2 (en) * | 1985-09-11 | 1995-12-25 | 株式会社ブリヂストン | Drive device having tactile function |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS635666Y2 (en) * | 1980-06-09 | 1988-02-16 | ||
| JPS6430990A (en) * | 1987-07-23 | 1989-02-01 | Sumitomo Metal Ind | Frp pipe with threaded joint |
-
1992
- 1992-02-26 JP JP4076032A patent/JP2719477B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05240378A (en) | 1993-09-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5906402A (en) | Dual synchronized thread fluid connector cross-reference to related application | |
| US6598908B1 (en) | Hydraulic fitting | |
| US4934742A (en) | Hydraulic coupling | |
| WO2007066452A1 (en) | Pipe joint locking device | |
| WO1992019897A2 (en) | Sealing system for connecting vcr-type and flat coupling hardware | |
| US5087085A (en) | Sealing system for connecting beaded and flat coupling hardware | |
| JP2719477B2 (en) | Connection structure between hydraulic pipe fittings and hydraulic equipment | |
| JPH04119285A (en) | Pipe joint hydraulic piping | |
| EP0326292B1 (en) | Hydraulic coupling | |
| JPH11148565A (en) | Ball valve | |
| JPS6217478A (en) | Needle valve | |
| JP3306371B2 (en) | Piping joint for wafer type butterfly valve | |
| JP3358968B2 (en) | Fitting for container valve | |
| KR960003742B1 (en) | Pipe coupling for oil pressure | |
| JPH0754709Y2 (en) | Pipe fitting | |
| GB1565334A (en) | Method of mounting valve seats in butterfly valves | |
| CA2146081C (en) | Threaded valve with safety joint | |
| JPH11325292A (en) | Piping joint for wafer type butterfly valve | |
| JP2594646Y2 (en) | Pipe fittings | |
| JP4229378B2 (en) | Butterfly valve | |
| JP3469520B2 (en) | Gas tap | |
| JPS643877Y2 (en) | ||
| JPH0410466Y2 (en) | ||
| JPH032064Y2 (en) | ||
| JP2001254849A (en) | Ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121114 Year of fee payment: 15 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121114 Year of fee payment: 15 |