JP3951197B2 - Flexible pipe fittings - Google Patents

Flexible pipe fittings Download PDF

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Publication number
JP3951197B2
JP3951197B2 JP14582797A JP14582797A JP3951197B2 JP 3951197 B2 JP3951197 B2 JP 3951197B2 JP 14582797 A JP14582797 A JP 14582797A JP 14582797 A JP14582797 A JP 14582797A JP 3951197 B2 JP3951197 B2 JP 3951197B2
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JP
Japan
Prior art keywords
flange
flexible pipe
ring
pipe joint
reinforcing ring
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
Application number
JP14582797A
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Japanese (ja)
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JPH10318469A (en
Inventor
兼芳 林
茂吉 林
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Sankei Giken Co Ltd
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Sankei Giken Co Ltd
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Filing date
Publication date
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Priority to JP14582797A priority Critical patent/JP3951197B2/en
Publication of JPH10318469A publication Critical patent/JPH10318469A/en
Application granted granted Critical
Publication of JP3951197B2 publication Critical patent/JP3951197B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、各種配管の中間部等に介装される可撓性管継手に関する。
【0002】
【従来の技術】
配管に接続される可撓性管継手は、筒状部の軸方向両端にフランジ部が一体的に形成されている。そして、そのフランジ部の最大径部分に補強リングが埋設されたものが存在した。また可撓性管継手は、その軸方向の変形が容易となるようにその筒状部の横断面が波形になるように形成されている。さらに筒状部の中央部には、内圧により過度に変形することを防止するため、ピアノ線等からなるリング材が埋設されている。
このような可撓性管継手は、配管のフランジに可撓性管継手のフランジ部端面が当接され、相フランジを介してボルトおよびナットにより締結固定されるものである。
【0003】
【発明が解決しようとする課題】
可撓性管継手のフランジ部の最大径部分に補強リングが埋設されたものにおいて、相フランジを介して配管に可撓性管継手のフランジ部を締結固定すると、その補強リング近傍の端面に亀裂が生じることがある。特に、配管に大きな内圧が加わる可撓性管継手において亀裂が生じ易い。これは補強リングが存在する部分において、弾性変形が制限され、そこに最大応力が加わるためと推測される。
また内圧が加わる従来の可撓性管継手は、その筒状部中央に多数のピアノ線等を配置するため、その製造が面倒であり、量産性に欠ける欠点があった。
そこで、本発明はこれらの各種欠点を取り除くことを課題とし、各種実験の結果、次の構成によりそれを解決した。
【0004】
【課題を解決するための手段】
請求項1記載の本発明の可撓性管継手は、筒状部1の軸線方向の両端に断面L字状の接続用フランジ部2が突設された可撓性管継手において、
そのフランジ部2の最大半径部分に内装された補強リング3と、
前記筒状部1およびフランジ部2に埋設され、前記補強リング3を取り囲む積層された複数枚のタイヤコード4と、
前記フランジ部2の配管接続側端面に、その最少半径の位置から前記補強リング3の半径より小なる位置まで、環状で平板状に一体的に突設され且つ、ゴム材のみよりなる強圧接用凸部5と、その強圧接用凸部5の半径方向の外側に、それから接続用フランジ部2の周縁までに相対的に凹陥して平坦に形成された弱圧接用のリング部平坦面9と、
を具備し、
相フランジ7および締結具6,6aにより前記フランジ部2を配管8に接続したとき、前記強圧接用凸部5が前記リング部平坦面9に比べて軸方向に大きく変形される可撓性管継手。
【0005】
また、請求項2記載の本発明は上記発明において、前記補強リング3の位置で前記筒状部1側に環状に突出した凸条部11が形成され、その凸条部11と前記フランジ部2の付根とに環状凹部12が形成され、その環状凹部12および前記凸条部11に整合する端面を有する前記相フランジ7が使用されるものである。
さらに、請求項3記載の本発明は上記請求項1の発明において、前記リング部平坦面9に前記タイヤコード4が配置されたものである。
また請求項4記載の本発明は請求項1の発明において、前記筒状部1の断面が軸方向の中心に対して対称に形成され、その中心部に断面が波の頂部となる台形状凸部13が形成され、その台形状凸部13内にその凸部の幅より小なる幅の細帯タイヤコード14が積層して埋設されたものである。
【0006】
【発明の実施の形態】
次に、図面に基づいて本発明の可撓性管継手の実施の形態につき説明する。
図1は本可撓性管継手の要部断面図であり、図2はその取付状態を示す説明図、図3は本可撓性管継手の使用時であってボルト締結前の状態を示す横断面図である。
本発明の可撓性管継手は、断面波形に曲折された筒状部1の軸方向両端に断面L字状のフランジ部2が一体的に突設されている。筒状部1の長手方向中央部には断面台形状凸部13が形成され、その内部に細帯タイヤコード14が積層して懸回されている。この細帯タイヤコード14の幅は台形状凸部13のそれよりもわずかに小に形成され、各積層される細帯タイヤコード14間には図示しない薄い接合用ゴム材が介装されている。また、筒状部1およびフランジ部2には夫々タイヤコード4が埋設され、そのタイヤコード4の両端部がフランジ部2内で補強リング3外周を取り囲んでいる。積層されたこのタイヤコード4の間にも、図示しない薄い接合用ゴム材が介装されている。
【0007】
次に、フランジ部2の最大半径部分には、筒状部1側に環状に凸条部11が一体的に突出され、その最大半径部分の中央に補強リング3が埋設されている。この例では、補強リング3は断面が円形に形成されているが、それに限らず平板状のものであってもよい。あるいは、ピアノ線を複数巻回することもできる。そしてこのフランジ部2の筒状部1側端面は、前記凸条部11の存在により相対的にフランジ部2の付け根部に環状凹部12が形成される。
【0008】
次に、フランジ部2の接続面側端面にはゴム材のみからなる強圧接用凸部5が一体的に突設されている。この強圧接用凸部5は、補強リング3まで達しないように且つ環状で平板状に突設され、その内部にはタイヤコードが存在しない。即ち、この強圧接用凸部5はフランジ部2の配管接続側端面に、前記筒状部1の最少半径の位置から前記補強リング3の半径より小なる位置まで、環状で平板状に一体的に突設され且つ、ゴム材のみよりなる。
この強圧接用凸部5の最大直径部分は斜めに形成されると共に、最小直径部分も同様に隅取り部15が形成されている。そしてフランジ部2の最大直径部の端面には、リング部平坦面9が相対的に凹陥して形成されている。この強圧接用凸部5の突出量tは、可撓性管継手の締結時における弾性変形量に実質的に一致させておく。すなわち、相フランジ7および締結具6,6aによりフランジ部2を配管8に接続したとき、図2の如く強圧接用凸部5が軸方向に大きく変形すると共に、リング部平坦面9はほとんど変形することがない。このリング部平坦面9には、タイヤコード4が実質的に露出する。なお、その表面にはゴム皮膜がわずかに被覆されている。
このような可撓性管継手を締結するための相フランジ7は環状に形成され、その軸方向一端面がフランジ部2の筒状部1側の形状に整合する。そして両者の嵌着状態において、相フランジ7の周縁部の一端面はリング部平坦面9と面一に形成される。
【0009】
【使用方法】
本発明の可撓性管継手は、図3に示す如く、夫々のフランジ部2が一対の相フランジ7を介して配管8にボルトおよびナットからなる締結具6,6aにより締結固定される。その際に強圧接用凸部5が大きく変形すると共に、特にフランジ部2の首部が変形して、図2に示す如く締結固定される。このとき、可撓性管継手のフランジ部2のリング部平坦面9はほとんど変形することはない。そのため、リング部平坦面9部分に過度な応力集中が生じる虞はない。
【0010】
【発明の作用・効果】
本発明の可撓性管継手は、フランジ部2の配管接続側端面に一体的にゴム材のみよりなる強圧接用凸部5を平板状に突出したものである。そして、この可撓性管継手の接続時に、強圧接用凸部5が大きく変形されると共に、リング部平坦面9は殆ど変形することがないように締結具6,6aにより締結されるものである。従って、従来の可撓性管継手の補強リング3近傍の端面に生じていた亀裂の発生を防止し得る。即ち、可撓性管継手を配管に圧接したとき、最も応力集中が起こっていた損傷し易い部分をなくすことにより、そこに生じる亀裂およびその亀裂の発達を防止するものである。
また、請求項2記載の本発明は、補強リング3の近傍に凸条部11が突出されると共に、その凸条部11とフランジ部2の付け根との間に環状凹部12が形成され、その環状凹部12に相フランジ7が整合するように構成されているから、その環状凹部12および強圧接用凸部5のみを弾性変形させ、補強リング3の近傍外周を相フランジ7によって保持することができる。それにより、可撓性管継手に内圧が加わってもフランジ部2が外れることがなく、信頼性の高いものとなる。
【0011】
次に、請求項3記載の本発明は、リング部平坦面9にタイヤコード4が配置されているため、リング部平坦面9部分が補強され、そこに亀裂を生じさせることがない。
さらに、請求項4記載の本発明は、筒状部1の中央部に台形状凸部13が形成され、その台形状凸部13に細帯タイヤコード14が積層して配置されたものであるから、内圧により可撓性管継手の中心部が異常に変形することを効果的に防止できる。しかも、その台形状凸部13は細帯タイヤコード14の積層体で構成できるため、製造し易く量産性の高い可撓性管継手となり得る。
【図面の簡単な説明】
【図1】本発明の可撓性管継手の要部断面図。
【図2】同可撓性管継手の取付状態を示す説明図。
【図3】本発明の可撓性管継手の使用時における締結前の状態を示す横断面図。
【符号の説明】
1 筒状部
2 フランジ部
3 補強リング
4 タイヤコード
5 強圧接用凸部
6,6a 締結具
7 相フランジ
8 配管
9 リング部平坦面
10 フランジ
11 凸条部
12 環状凹部
13 台形状凸部
14 細帯タイヤコード
15 隅取り部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flexible pipe joint interposed in an intermediate portion or the like of various pipes.
[0002]
[Prior art]
As for the flexible pipe joint connected to piping, the flange part is integrally formed in the axial direction both ends of the cylindrical part. And there existed a reinforcing ring embedded in the maximum diameter portion of the flange portion. Further, the flexible pipe joint is formed so that the cross section of the cylindrical portion has a corrugated shape so that the deformation in the axial direction is easy. Further, a ring material made of a piano wire or the like is embedded in the central portion of the cylindrical portion in order to prevent excessive deformation due to internal pressure.
In such a flexible pipe joint, a flange end face of the flexible pipe joint is brought into contact with a flange of a pipe, and is fastened and fixed by a bolt and a nut through a phase flange.
[0003]
[Problems to be solved by the invention]
In the case where a reinforcing ring is embedded in the maximum diameter portion of the flange portion of the flexible pipe joint, when the flange portion of the flexible pipe joint is fastened and fixed to the pipe via the phase flange, the end face near the reinforcing ring is cracked. May occur. In particular, cracks are likely to occur in flexible pipe joints in which a large internal pressure is applied to the piping. This is presumably because the elastic deformation is limited in the portion where the reinforcing ring exists, and the maximum stress is applied thereto.
In addition, the conventional flexible pipe joint to which internal pressure is applied has a drawback in that it is troublesome to manufacture because a large number of piano wires and the like are arranged at the center of the cylindrical portion, and the mass productivity is lacking.
Therefore, the present invention has been made to solve these various drawbacks, and as a result of various experiments, it has been solved by the following configuration.
[0004]
[Means for Solving the Problems]
The flexible pipe joint of the present invention according to claim 1 is a flexible pipe joint in which connecting flange portions 2 having an L-shaped cross section project from both ends in the axial direction of the cylindrical portion 1.
A reinforcing ring 3 built in the largest radius portion of the flange portion 2;
A plurality of stacked tire cords 4 embedded in the tubular portion 1 and the flange portion 2 and surrounding the reinforcing ring 3;
From the position of the minimum radius of the flange portion 2 on the pipe connection side end surface to a position smaller than the radius of the reinforcing ring 3, the ring portion is integrally projected in a flat plate shape and is used for strong pressure welding made of only a rubber material. A convex portion 5 and a ring pressing portion flat surface 9 for weak pressure welding formed on the outer side in the radial direction of the strong pressure welding convex portion 5 and then recessed relatively to the periphery of the connecting flange portion 2; ,
Comprising
When the flange portion 2 is connected to the pipe 8 by the companion flange 7 and the fasteners 6 and 6a, the flexible pressure-bonding convex portion 5 is greatly deformed in the axial direction as compared with the ring portion flat surface 9. Fittings.
[0005]
Further, in the present invention according to claim 2, in the above-described invention, a ridge portion 11 projecting annularly toward the cylindrical portion 1 is formed at the position of the reinforcing ring 3, and the ridge portion 11 and the flange portion 2 are formed. An annular recess 12 is formed at the base of the ring flange, and the companion flange 7 having an end face aligned with the annular recess 12 and the ridge 11 is used.
Further, the present invention according to claim 3 is the invention according to claim 1, wherein the tire cord 4 is disposed on the flat surface 9 of the ring portion.
According to a fourth aspect of the present invention, in the first aspect of the present invention, the cylindrical portion 1 has a trapezoidal convex shape in which the cross section of the cylindrical portion 1 is formed symmetrically with respect to the axial center and the cross section is the top of the wave A portion 13 is formed, and a narrow tire cord 14 having a width smaller than the width of the convex portion is laminated and embedded in the trapezoidal convex portion 13.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the flexible pipe joint of the present invention will be described based on the drawings.
FIG. 1 is a cross-sectional view of the main part of the flexible pipe joint, FIG. 2 is an explanatory view showing the mounting state thereof, and FIG. 3 shows the state before the bolt fastening when the flexible pipe joint is used. It is a cross-sectional view.
In the flexible pipe joint of the present invention, flange portions 2 having an L-shaped cross section are integrally projected at both ends in the axial direction of a cylindrical portion 1 bent into a corrugated cross section. A cross-section trapezoidal convex portion 13 is formed at the central portion in the longitudinal direction of the cylindrical portion 1, and a narrow tire cord 14 is laminated and suspended in the inside. The width of the narrow tire cord 14 is formed slightly smaller than that of the trapezoidal convex portion 13, and a thin bonding rubber material (not shown) is interposed between the laminated thin tire cords 14. . Further, a tire cord 4 is embedded in each of the cylindrical portion 1 and the flange portion 2, and both end portions of the tire cord 4 surround the outer periphery of the reinforcing ring 3 in the flange portion 2. A thin bonding rubber material (not shown) is also interposed between the tire cords 4 stacked.
[0007]
Next, in the maximum radius portion of the flange portion 2, a protruding ridge portion 11 is integrally protruded annularly on the tubular portion 1 side, and a reinforcing ring 3 is embedded in the center of the maximum radius portion. In this example, the reinforcing ring 3 has a circular cross section. However, the reinforcing ring 3 is not limited to this and may have a flat plate shape. Alternatively, a plurality of piano wires can be wound. And the annular recessed part 12 is formed in the root part of the flange part 2 relatively by the presence of the said protruding item | line part 11 at the cylindrical part 1 side end surface of this flange part 2. As shown in FIG.
[0008]
Next, on the connecting surface side end face of the flange portion 2, a strong pressure contact convex portion 5 made of only a rubber material is integrally projected. The strong pressure contact convex portion 5 is provided in a ring shape so as not to reach the reinforcing ring 3, and there is no tire cord therein. That is, the convex portion 5 for strong pressure welding is formed in an annular flat plate shape from the position of the minimum radius of the cylindrical portion 1 to a position smaller than the radius of the reinforcing ring 3 on the pipe connection side end surface of the flange portion 2. And is made of only a rubber material.
The maximum diameter portion of the high pressure contact convex portion 5 is formed obliquely, and the corner portion 15 is similarly formed in the minimum diameter portion. A ring portion flat surface 9 is relatively recessed and formed on the end surface of the maximum diameter portion of the flange portion 2. The protrusion amount t of the strong pressure contact convex portion 5 is made to substantially coincide with the elastic deformation amount when the flexible pipe joint is fastened. That is, when the flange portion 2 is connected to the pipe 8 by the companion flange 7 and the fasteners 6 and 6a, the high pressure contact convex portion 5 is greatly deformed in the axial direction as shown in FIG. 2, and the ring portion flat surface 9 is almost deformed. There is nothing to do. The tire cord 4 is substantially exposed on the flat surface 9 of the ring portion. The surface is slightly covered with a rubber film.
The phase flange 7 for fastening such a flexible pipe joint is formed in an annular shape, and one end surface in the axial direction thereof matches the shape of the flange portion 2 on the tubular portion 1 side. And in both fitting state, the one end surface of the peripheral part of the companion flange 7 is formed flush with the ring part flat surface 9.
[0009]
【how to use】
In the flexible pipe joint of the present invention, as shown in FIG. 3, each flange portion 2 is fastened and fixed to a pipe 8 by means of fasteners 6 and 6 a made of bolts and nuts via a pair of phase flanges 7. At this time, the strong pressure contact convex portion 5 is greatly deformed, and particularly the neck portion of the flange portion 2 is deformed and fastened and fixed as shown in FIG. At this time, the ring portion flat surface 9 of the flange portion 2 of the flexible pipe joint hardly deforms. Therefore, there is no possibility that excessive stress concentration occurs in the ring portion flat surface 9 portion.
[0010]
[Operation and effect of the invention]
In the flexible pipe joint of the present invention, a strong pressure contact convex portion 5 made of only a rubber material is integrally projected on a pipe connection side end face of the flange portion 2 in a flat plate shape. When the flexible pipe joint is connected, the strong pressure contact convex portion 5 is greatly deformed, and the ring portion flat surface 9 is fastened by the fasteners 6 and 6a so as to hardly deform. is there. Accordingly, it is possible to prevent the occurrence of cracks that have occurred on the end face near the reinforcing ring 3 of the conventional flexible pipe joint. That is, when the flexible pipe joint is pressed against the pipe, the portion that is most likely to be stressed and easily damaged is eliminated, thereby preventing the crack generated there and the development of the crack.
Further, according to the second aspect of the present invention, the ridge portion 11 protrudes in the vicinity of the reinforcing ring 3 and an annular recess 12 is formed between the ridge portion 11 and the root of the flange portion 2. Since the phase flange 7 is configured to be aligned with the annular recess 12, only the annular recess 12 and the strong pressure contact projection 5 can be elastically deformed, and the outer periphery in the vicinity of the reinforcing ring 3 can be held by the phase flange 7. it can. Thereby, even if an internal pressure is applied to the flexible pipe joint, the flange portion 2 does not come off and the reliability is high.
[0011]
In the third aspect of the present invention, since the tire cord 4 is disposed on the ring portion flat surface 9, the ring portion flat surface 9 portion is reinforced and does not cause cracks.
Further, according to the present invention, a trapezoidal convex portion 13 is formed at the central portion of the tubular portion 1, and a narrow tire cord 14 is laminated on the trapezoidal convex portion 13. Therefore, it is possible to effectively prevent the central portion of the flexible pipe joint from being deformed abnormally by the internal pressure. Moreover, since the trapezoidal convex portion 13 can be constituted by a laminated body of the narrow belt tire cord 14, it can be a flexible pipe joint that is easy to manufacture and has high mass productivity.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a principal part of a flexible pipe joint of the present invention.
FIG. 2 is an explanatory view showing a mounting state of the flexible pipe joint.
FIG. 3 is a cross-sectional view showing a state before fastening when using the flexible pipe joint of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical part 2 Flange part 3 Reinforcement ring 4 Tire cord 5 Convex part 6 and 6a for high pressure welding Fastener 7 Companion flange 8 Piping 9 Ring part flat surface
10 Flange
11 Convex section
12 Annular recess
13 Trapezoidal convex
14 narrow tire cord
15 Chamfer

Claims (4)

筒状部1の軸線方向の両端に断面L字状の接続用フランジ部2が突設された可撓性管継手において、
そのフランジ部2の最大半径部分に内装された補強リング3と、
前記筒状部1およびフランジ部2に埋設され、前記補強リング3を取り囲む積層された複数枚のタイヤコード4と、
前記フランジ部2の配管接続側端面に、その最少半径の位置から前記補強リング3の半径より小なる位置まで、環状で平板状に一体的に突設され且つ、ゴム材のみよりなる強圧接用凸部5と、その強圧接用凸部5の半径方向の外側に、それから接続用フランジ部2の周縁までに相対的に凹陥して平坦に形成された弱圧接用のリング部平坦面9と、
を具備し、
相フランジ7および締結具6,6aにより前記フランジ部2を配管8に接続したとき、前記強圧接用凸部5が前記リング部平坦面9に比べて軸方向に大きく変形される可撓性管継手。
In a flexible pipe joint in which connecting flange portions 2 having an L-shaped cross section project from both ends in the axial direction of the cylindrical portion 1,
A reinforcing ring 3 built in the largest radius portion of the flange portion 2;
A plurality of stacked tire cords 4 embedded in the tubular portion 1 and the flange portion 2 and surrounding the reinforcing ring 3;
From the position of the minimum radius of the flange portion 2 on the pipe connection side end surface to a position smaller than the radius of the reinforcing ring 3, the ring portion is integrally projected in a flat plate shape and is used for strong pressure welding made of only a rubber material. A convex portion 5 and a ring pressing portion flat surface 9 for weak pressure welding, which is formed in the outer side in the radial direction of the strong pressure welding convex portion 5 and then recessed relatively to the periphery of the connecting flange portion 2; ,
Comprising
When the flange portion 2 is connected to the pipe 8 by the companion flange 7 and the fasteners 6 and 6a, the flexible pressure-bonding convex portion 5 is greatly deformed in the axial direction as compared with the ring portion flat surface 9. Fittings.
請求項1において、前記補強リング3の位置で前記筒状部1側に環状に突出した凸条部11が形成され、その凸条部11と前記フランジ部2の付根とに環状凹部12が形成され、その環状凹部12および前記凸条部11に整合する端面を有する前記相フランジ7が使用される可撓性管継手。In Claim 1, the protruding item | line part 11 which protruded cyclically | annularly in the said cylindrical part 1 side in the position of the said reinforcing ring 3 is formed, and the cyclic | annular recessed part 12 is formed in the root part of the protruding item | line part 11 and the said flange part 2. A flexible pipe joint in which the companion flange 7 having an end face aligned with the annular recess 12 and the ridge 11 is used. 請求項1において、前記リング部平坦面9に前記タイヤコード4が配置された可撓性管継手。The flexible pipe joint according to claim 1, wherein the tire cord 4 is disposed on the flat surface 9 of the ring portion. 請求項1において、前記筒状部1の断面が軸方向の中心に対して対称に形成され、その中心部に断面が波の頂部となる台形状凸部13が形成され、その台形状凸部13内にその凸部の幅より小なる幅の細帯タイヤコード14が積層して埋設された可撓性管継手。In Claim 1, the cross section of the said cylindrical part 1 is formed symmetrically with respect to the center of an axial direction, The trapezoid-shaped convex part 13 from which a cross section becomes a wave | top part of a wave is formed in the center part, The trapezoidal convex part A flexible pipe joint in which a narrow tire cord 14 having a width smaller than the width of the convex portion is laminated and embedded in 13.
JP14582797A 1997-05-20 1997-05-20 Flexible pipe fittings Expired - Fee Related JP3951197B2 (en)

Priority Applications (1)

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JP14582797A JP3951197B2 (en) 1997-05-20 1997-05-20 Flexible pipe fittings

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Application Number Priority Date Filing Date Title
JP14582797A JP3951197B2 (en) 1997-05-20 1997-05-20 Flexible pipe fittings

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JPH10318469A JPH10318469A (en) 1998-12-04
JP3951197B2 true JP3951197B2 (en) 2007-08-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010071343A (en) * 2008-09-17 2010-04-02 Sankei Giken:Kk Flexible pipe joint
JP5684517B2 (en) * 2010-09-13 2015-03-11 倉敷化工株式会社 Flexible joint
JP5684516B2 (en) * 2010-03-24 2015-03-11 倉敷化工株式会社 Flexible joint

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