JPS58604A - Actuator - Google Patents
ActuatorInfo
- Publication number
- JPS58604A JPS58604A JP9807881A JP9807881A JPS58604A JP S58604 A JPS58604 A JP S58604A JP 9807881 A JP9807881 A JP 9807881A JP 9807881 A JP9807881 A JP 9807881A JP S58604 A JPS58604 A JP S58604A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- cylinder
- valve
- connecting rod
- actuator
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
- F15B15/125—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type of the curved-cylinder type
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はボールバルブ、バタフライバルブ等の回転型バ
ルブの操作に用いるアクチュエータに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an actuator used for operating rotary valves such as ball valves and butterfly valves.
回転型パルプの操作は、直線的な往復運動を行うピスト
ン・シリンダ方式のアクチュエータ、あるいは受圧羽根
を有する回転軸が円筒状のシリンダ内で往復回転運動を
行うロータリ・ベーン方式のアクチュエータを用いて行
っていた。」二記ピストン・シリンダ方式のアクチュエ
ータは、直線的な運動を回転運動に変換するために、カ
ムやギア等の変換機構が必要で構造が複雑になり、かつ
伝達ロスが大きかった。壕だ、ロータリ・ベーン方式の
アクチュエータは、受圧羽根とシリンダ室壁および回転
軸のシールが難しく、シール構造が複雑になり、而もこ
のシール部分の抵抗が大きくなっていた。Rotary pulp is operated using a piston-cylinder type actuator that performs linear reciprocating motion, or a rotary vane-type actuator that performs reciprocating rotation within a cylindrical cylinder with a rotating shaft that has pressure-receiving vanes. was. 2 Piston-cylinder type actuators require conversion mechanisms such as cams and gears to convert linear motion into rotational motion, resulting in a complex structure and large transmission loss. However, with rotary vane type actuators, it was difficult to seal the pressure receiving vanes, the cylinder chamber wall, and the rotating shaft, resulting in a complicated seal structure and the resistance of this seal part was large.
本発明はピストン俸ンリ/ダ方式のアクチュエ−タであ
って、往復回転運動を出力し、カム・ギア等の変換機構
を必要とせず、かつシール構造が簡単でこの部分の抵抗
も小さいものの提供を目的とする。The present invention is an actuator of the piston-type reader/actuator, which outputs reciprocating rotational motion, does not require a conversion mechanism such as a cam or gear, has a simple seal structure, and has low resistance in this part. With the goal.
本発明はこの目的を、円弧状に曲がっだ筒壁および筒壁
の端部開口を塞ぐ端壁を有するシリンダ部材であって被
操作側のバルブケーシング等に固定されるもの、シリン
ダ部材内を気密的にΔ動する様に配したピストン部材、
シリンダ部材の端壁を気密的に貫通してピストン部材に
連結した操作棒であってシリンダ部材の筒壁と同心円的
に円弧状に曲がりかつピストン部材に連動して往復回転
運動を行うもの、操作棒から内径方向に伸びて***作側
のバルブの弁軸等に連結する連結棒であってこの弁軸等
を回転操作するものから成り、シリンダ部材の筒壁と端
壁およびピストン部材で形成する室に流体圧力を導入排
出させることによシ作動するアクチュエータによって達
成せんとする。The present invention aims to achieve this objective by providing a cylinder member having an arcuate cylindrical wall and an end wall that closes an end opening of the cylindrical wall, which is fixed to a valve casing on the side to be operated, etc. A piston member arranged to move Δ relative to
An operating rod that airtightly penetrates the end wall of a cylinder member and is connected to a piston member, which bends in an arc concentrically with the cylindrical wall of the cylinder member and performs reciprocating rotational movement in conjunction with the piston member. A connecting rod that extends from the rod in the inner diameter direction and connects to the valve shaft of the operated valve, which is rotated and formed by the cylindrical wall and end wall of the cylinder member and the piston member. This is accomplished by an actuator that operates by introducing and discharging fluid pressure into a chamber.
次に、本発明を図示の実施例に基づいて説明する。第1
図に於いて、1はボルルバルブやバタフケーレ〉7゛
ライバルブ等のパルゝ%す。バルブ1のグランド部2に
取付は部材3をボルト4で締付けて固定する。取付は部
材3はバルブ1側からの伝熱を防正する為に放熱用のフ
ィン5を設ける。取付は部材3は腕部6を介してシリン
ダ部材7に連結する。Next, the present invention will be explained based on illustrated embodiments. 1st
In the figure, 1 is the pulse of the Borl valve, butterfly valve, etc. The member 3 is attached to the gland portion 2 of the valve 1 by tightening the bolt 4. For installation, the member 3 is provided with heat radiation fins 5 to prevent heat transfer from the valve 1 side. For attachment, the member 3 is connected to the cylinder member 7 via the arm portion 6.
シリンダ部材7は第2図に示す如く、バルブ1の弁軸と
同心円的に円弧状に曲がった筒壁8および筒壁8の両端
開口を塞ぐ端壁9から作る。/リング部材7内にはンリ
ンダ室を形成し、ピストン10を配す。ピストン10の
外周は環状/−ル部材11を介在して筒壁8−内を気密
的に摺動する様にする。ピストン10はシリンダ部材7
の端壁9を7一ル部材12を介して気密的に貫通した操
作棒13に連結する。操作棒13はバルブlの弁軸を中
心に円弧状に曲げて作る。更に、ピストン部材7を組立
てる際には第2図A−Aで示す線より左二
右西つの円弧に分割し、ピストン部材70組立て後に溶
接等によって結合し一つの円形の部材に形成する。シリ
ンダ部材7の端壁9は外側に突出した突出部14を設け
、この部分に操作棒13を摺動案内するライナ15を取
付ける。。ライナ15はドライベアリング等を用いる。As shown in FIG. 2, the cylinder member 7 is made of a cylindrical wall 8 concentrically curved in an arc shape with the valve shaft of the valve 1, and an end wall 9 that closes openings at both ends of the cylindrical wall 8. /A cylinder chamber is formed in the ring member 7, and a piston 10 is disposed therein. The outer periphery of the piston 10 is configured to slide airtightly within the cylindrical wall 8 with an annular member 11 interposed therebetween. The piston 10 is the cylinder member 7
The end wall 9 of the holder is connected to an operating rod 13 which passes through the end wall 9 in an airtight manner via a 7-round member 12. The operating rod 13 is bent into an arc shape around the valve stem of the valve l. Furthermore, when assembling the piston member 7, it is divided into two circular arcs to the left and right of the line shown in FIG. The end wall 9 of the cylinder member 7 is provided with an outwardly protruding protrusion 14, and a liner 15 for slidingly guiding the operating rod 13 is attached to this protrusion 14. . The liner 15 uses a dry bearing or the like.
ピストン11の左右側部には室16・17を設け、この
室16・17は通孔18・19を通して圧力流体を交互
に導入排出する。シリンダ部材7の端壁9の内側にはピ
ストン10の摺動範囲を決めるストッパー用の突起20
を設ける。この規制範囲はバルブlの弁軸を90度回転
できる範囲とする。操作棒13は内径方向に伸びた連結
棒21と一体に作る。連結棒21の内径側の端部はほぼ
四角形の孔22を有するリング状に作る。このリング状
部分24の孔22はバルブ1の弁軸の四角柱部23に嵌
合する。Chambers 16 and 17 are provided on the left and right sides of the piston 11, and pressure fluid is introduced and discharged alternately into the chambers 16 and 17 through through holes 18 and 19. On the inside of the end wall 9 of the cylinder member 7 is a projection 20 for a stopper that determines the sliding range of the piston 10.
will be established. This regulation range is a range in which the valve shaft of valve l can be rotated by 90 degrees. The operating rod 13 is made integrally with a connecting rod 21 extending in the inner diameter direction. The inner diameter end of the connecting rod 21 is formed into a ring shape having a substantially square hole 22. The hole 22 of this ring-shaped portion 24 fits into the square column portion 23 of the valve shaft of the valve 1.
リング状部分24は弁軸の先端部25に螺合したナンド
26で固定する。リング状部分24とナンド26および
取付は部材30間にはスライドリング27・28を介在
し、回転時の抵抗を軽゛滅する。The ring-shaped portion 24 is fixed with a Nand 26 screwed onto the tip 25 of the valve stem. Slide rings 27 and 28 are interposed between the ring-shaped portion 24 and the NAND 26 and the mounting member 30 to reduce resistance during rotation.
29は補強用のリブ、30はガスケットである。29 is a reinforcing rib, and 30 is a gasket.
上記実施例の動作を説明する。シリンダ部材7の室16
に圧力流体を導入し、室17内の圧力流体を排出する時
、ピストン10は反時計方向に摺動する。操作棒13は
ピストン10と同じく反時計方向に駆動され、連結棒2
1およびリング状部分24を介して弁軸を回転させる。The operation of the above embodiment will be explained. Chamber 16 of cylinder member 7
When introducing pressure fluid into the chamber 17 and discharging the pressure fluid within the chamber 17, the piston 10 slides counterclockwise. The operating rod 13 is driven counterclockwise like the piston 10, and the connecting rod 2
1 and the ring-shaped portion 24 to rotate the valve shaft.
バルブ1内の弁体は弁軸の回転によって開弁又は閉弁位
置まで回転する。ピストン10はシリンダ部材7の突起
20に当接した時、ピスト/10、操作棒13、連結棒
2111Jング状部分24の変位は止まる。The valve body within the valve 1 is rotated to an open or closed position by rotation of the valve shaft. When the piston 10 comes into contact with the protrusion 20 of the cylinder member 7, the displacement of the piston 10, the operating rod 13, and the connecting rod 2111J ring-shaped portion 24 stops.
次に、室16内の圧力流体を排出し、室17に圧力流体
を導入した時、ピストン10.操作棒13、連結棒21
およびリング状部分24は時計方向に回転し、バルブl
の弁軸を時計方向に回転させる。この回転はピストン1
0が突起20に当接するまで続き、当接した時にバルブ
1の弁体は次の閉弁又は開弁位置に達する。この様にシ
リンダ部材7の室16・17に圧力流体を交互に導入排
出することにより本アクチュエータはバルブlを開閉操
作する。シリンダ部材7の通孔18・]−9は室16・
17の圧力を司る為に四方切換弁等を介して圧力流体源
と接続するとよい。Next, when the pressure fluid in the chamber 16 is discharged and the pressure fluid is introduced into the chamber 17, the piston 10. Operating rod 13, connecting rod 21
and the ring-shaped portion 24 rotates clockwise, causing the valve l
Rotate the valve stem clockwise. This rotation is piston 1
0 continues until it abuts against the protrusion 20, at which point the valve body of the valve 1 reaches the next closed or opened position. In this way, by alternately introducing and discharging the pressure fluid into the chambers 16 and 17 of the cylinder member 7, the present actuator opens and closes the valve l. The through hole 18.]-9 of the cylinder member 7 is the chamber 16.
In order to control the pressure of No. 17, it is preferable to connect it to a pressure fluid source via a four-way switching valve or the like.
本実施例はピストン10がシリンダ部材7内を円弧状に
往復運動し、この運動を操作棒13、連結棒21を介し
てバルブ1の弁軸に出力するので、運動方向の変換機構
は不要で、アクチュエータの構造は簡単になる。シール
部分はビストノ10の外周とシリンダ部材7の筒壁8の
間、操作棒13の外周とシリンダ部材7の端壁9の間だ
けで、少なくシールが容易である。また、シール部分の
抵抗も小さくなる。ピストン10・シリンダ部材7から
成る部分はバルブlの弁軸と同心円的に配さ;h 、/
: ルフ1の弁軸から離れるので、ピストン10に作用
する流体圧力はこの離れた距離に応じて拡大され、大き
な力となって弁軸に出力できる。In this embodiment, the piston 10 reciprocates in an arc shape within the cylinder member 7, and this movement is output to the valve shaft of the valve 1 via the operating rod 13 and the connecting rod 21, so no mechanism for converting the direction of movement is required. , the structure of the actuator becomes simple. The sealing portions are only between the outer periphery of the biston 10 and the cylindrical wall 8 of the cylinder member 7, and between the outer periphery of the operating rod 13 and the end wall 9 of the cylinder member 7, and are easy to seal. Furthermore, the resistance of the seal portion is also reduced. The part consisting of the piston 10 and cylinder member 7 is arranged concentrically with the valve shaft of the valve l;
: Since the piston 10 is separated from the valve shaft of the valve 1, the fluid pressure acting on the piston 10 is expanded according to this distance, and can be outputted to the valve shaft as a large force.
シリンダ部材7の端壁9にはライナ15が配され、操作
棒13を案内するので、操作棒13は引掛りを起こし難
い。A liner 15 is disposed on the end wall 9 of the cylinder member 7 and guides the operating rod 13, so that the operating rod 13 is unlikely to get caught.
才だ、上記実施例′では単一のピスト/・/す/ダを用
いたが、例えばバルブの弁軸を中心に対称的に複数のピ
ストン・シリンダを配して操作棒と連結し、・・ルブの
操作力を拡大することもできる。In the above embodiment, a single piston was used, but for example, a plurality of pistons and cylinders could be arranged symmetrically around the valve shaft and connected to the operating rod.・It is also possible to expand the operating power of Lube.
更に、ピストンの側面の両側の室に圧力流体を導入排出
する様にしたが、片側の室だけに圧力流体を導入排出し
、他方の室にスプリングを配して、スプリング・リター
ン方式に操作の構成を簡単化することもできる。また、
ピストンはシリンダ部材内の突起によって90度の範囲
で円弧状の往復運動を行う様にしだが、この規制範囲は
バルブの種類、用途に応じて変更することもできる。更
に、本アクチュエータは回転型バルブ以外の、回転操作
の用途に用いることもできる。Furthermore, the pressure fluid was introduced and discharged into the chambers on both sides of the piston, but the pressure fluid was introduced and discharged only into one chamber, and a spring was placed in the other chamber, so that the operation was performed using a spring return method. The configuration can also be simplified. Also,
The piston is configured to perform circular arc-shaped reciprocating motion within a 90 degree range by means of a protrusion within the cylinder member, but this restricted range can be changed depending on the type and application of the valve. Furthermore, this actuator can also be used for rotational operations other than rotary valves.
本発明);Lかくして、ピストン・シリンダ方式のアク
チュエータでありながら、往復回転運動を出力してカム
・ギア等の運動方向の変換機構を必要とせず、構造の簡
単なアクチュエータを提供できる。更に、シール部分は
少なくシール構造は簡単で、この部分の抵抗も小さいア
クチュエータを提供できる。The present invention);L Thus, although it is a piston-cylinder type actuator, it is possible to provide an actuator with a simple structure that outputs reciprocating rotational motion and does not require a movement direction conversion mechanism such as a cam gear. Furthermore, it is possible to provide an actuator that has a simple seal structure with a small number of sealing parts and low resistance in this part.
第1図は本発明の一実施例のアクチュエータをバルブに
取付けた状態を示す断面図、第2図は第1図のB−B線
に於ける部分省略断面図。
1:バルブ、 3:取付は部材、 7:シリンダ部材
、 8:筒壁、 9:端壁、 1o:ピストン、
]3:操作棒、 15:ライナ、 18・19
:通孔、 ンO:ストッパー用の突起、 21:連
結棒。
特許出願人
株式会社 ティエルブ1
代表者藤原勝司FIG. 1 is a sectional view showing an actuator according to an embodiment of the present invention attached to a valve, and FIG. 2 is a partially omitted sectional view taken along line BB in FIG. 1. 1: Valve, 3: Mounting member, 7: Cylinder member, 8: Cylinder wall, 9: End wall, 1o: Piston,
] 3: Operation rod, 15: Liner, 18/19
: Through hole, O: Protrusion for stopper, 21: Connecting rod. Patent applicant Thielve Co., Ltd. Representative Katsuji Fujiwara
Claims (1)
ぐ端壁を有するシリンダ部材であって***作側のバルブ
ヶーンング等に固定されるもの、シリンダ部材内を気密
的に摺動する様に配したピストン部材、シリンダ部材の
端壁を気密的に貫通してピストン部材に連結した操作棒
であってシリンダ部材の筒壁と同心円的に円弧状に曲が
りかつピスト/部材に連動して往復回転運動を行うもの
、操作棒から内径方向に伸びて***作側のパルプの弁軸
等に連結する連結棒であってこの弁軸等を回転操作する
ものから成り、シリンダ部材の筒壁と端壁およびピスト
ン部材で形成する室に流体圧力を導入排出させることに
より作動するアクチュエータ。1. A cylinder member having a cylinder wall bent in an arc shape and an end wall that closes an opening at the end of the cylinder wall, which is fixed to a valve ring, etc. on the operated side, and which slides airtightly inside the cylinder member. A piston member arranged in the piston member, an operating rod connected to the piston member by passing through the end wall of the cylinder member in an airtight manner, which curves in an arc concentrically with the cylindrical wall of the cylinder member, and reciprocates in conjunction with the piston/member. It consists of a connecting rod that performs rotational movement, a connecting rod that extends in the inner diameter direction from the operating rod and connects to the valve shaft of the pulp on the operated side, and that rotates the valve shaft. An actuator that operates by introducing and discharging fluid pressure into a chamber formed by a wall and a piston member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9807881A JPS58604A (en) | 1981-06-23 | 1981-06-23 | Actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9807881A JPS58604A (en) | 1981-06-23 | 1981-06-23 | Actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58604A true JPS58604A (en) | 1983-01-05 |
Family
ID=14210308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9807881A Pending JPS58604A (en) | 1981-06-23 | 1981-06-23 | Actuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58604A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0375302U (en) * | 1989-11-24 | 1991-07-29 | ||
US5495791A (en) * | 1992-06-15 | 1996-03-05 | Sande; Kurt | Actuator for transfer of forward and backward rotational movement |
WO1999046514A3 (en) * | 1998-03-11 | 1999-11-04 | Eugen Rost | Drive arrangement actuated by a medium under pressure |
JP2008200790A (en) * | 2007-02-19 | 2008-09-04 | Kobe Steel Ltd | Joint mechanism |
JP2009068591A (en) * | 2007-09-12 | 2009-04-02 | Asoh Kk | Valve opening-closing device |
CN105179357A (en) * | 2015-06-10 | 2015-12-23 | 创银机械技术(上海)有限公司 | Hydraulic annular joint oil cylinder |
CN106855147A (en) * | 2015-12-09 | 2017-06-16 | 王翔 | A kind of pneumatic linear actuator for controlling valve rod |
CN106855135A (en) * | 2015-12-09 | 2017-06-16 | 王翔 | A kind of pneumatic ball valve |
WO2018027194A3 (en) * | 2016-08-05 | 2018-06-07 | Kamran Eftekhari Shahroudi | Multi-chamber rotary piston actuator |
US10563677B2 (en) | 2016-12-21 | 2020-02-18 | Woodward, Inc. | Butterfly rotary piston type actuator |
CN111075986A (en) * | 2020-01-13 | 2020-04-28 | 秦宪斌 | Pneumatic actuator for driving regulating valve |
US20200325918A1 (en) * | 2015-08-21 | 2020-10-15 | Quality Manufacturing Inc. | Devices and systems for producing rotational actuation |
US10954973B2 (en) | 2017-07-14 | 2021-03-23 | Woodward, Inc. | Unsupported piston with moving seal carrier |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3070075A (en) * | 1959-05-19 | 1962-12-25 | Hanselmann Frank | Twin-cylinder fluid motor with pendulum piston |
JPS4721055U (en) * | 1971-03-12 | 1972-11-09 | ||
JPS568204A (en) * | 1979-06-29 | 1981-01-28 | Matsushita Electric Works Ltd | Preparation of moistureeproof woody aggregate wood |
-
1981
- 1981-06-23 JP JP9807881A patent/JPS58604A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3070075A (en) * | 1959-05-19 | 1962-12-25 | Hanselmann Frank | Twin-cylinder fluid motor with pendulum piston |
JPS4721055U (en) * | 1971-03-12 | 1972-11-09 | ||
JPS568204A (en) * | 1979-06-29 | 1981-01-28 | Matsushita Electric Works Ltd | Preparation of moistureeproof woody aggregate wood |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0375302U (en) * | 1989-11-24 | 1991-07-29 | ||
US5495791A (en) * | 1992-06-15 | 1996-03-05 | Sande; Kurt | Actuator for transfer of forward and backward rotational movement |
WO1999046514A3 (en) * | 1998-03-11 | 1999-11-04 | Eugen Rost | Drive arrangement actuated by a medium under pressure |
JP2008200790A (en) * | 2007-02-19 | 2008-09-04 | Kobe Steel Ltd | Joint mechanism |
JP2009068591A (en) * | 2007-09-12 | 2009-04-02 | Asoh Kk | Valve opening-closing device |
CN105179357A (en) * | 2015-06-10 | 2015-12-23 | 创银机械技术(上海)有限公司 | Hydraulic annular joint oil cylinder |
US20200325918A1 (en) * | 2015-08-21 | 2020-10-15 | Quality Manufacturing Inc. | Devices and systems for producing rotational actuation |
CN106855147A (en) * | 2015-12-09 | 2017-06-16 | 王翔 | A kind of pneumatic linear actuator for controlling valve rod |
CN106855135A (en) * | 2015-12-09 | 2017-06-16 | 王翔 | A kind of pneumatic ball valve |
WO2018027194A3 (en) * | 2016-08-05 | 2018-06-07 | Kamran Eftekhari Shahroudi | Multi-chamber rotary piston actuator |
US10273661B2 (en) | 2016-08-05 | 2019-04-30 | Woodward, Inc. | Multi-chamber rotary piston actuator |
US12012976B2 (en) | 2016-08-05 | 2024-06-18 | Woodward, Inc. | Multi-axis rotary piston actuator |
US10655303B2 (en) | 2016-08-05 | 2020-05-19 | Woodward, Inc. | Multi-axis rotary piston actuator |
US11280356B2 (en) | 2016-08-05 | 2022-03-22 | Woodward, Inc. | Multi-axis rotary piston actuator |
US10883522B2 (en) | 2016-08-05 | 2021-01-05 | Woodward. Inc. | Multi-chamber rotary piston actuator |
US11391305B2 (en) | 2016-08-05 | 2022-07-19 | Woodward, Inc. | Multi-chamber rotary piston actuator |
US10563677B2 (en) | 2016-12-21 | 2020-02-18 | Woodward, Inc. | Butterfly rotary piston type actuator |
US10935054B2 (en) | 2016-12-21 | 2021-03-02 | Woodward, Inc. | Butterfly rotary piston type actuator |
US10954973B2 (en) | 2017-07-14 | 2021-03-23 | Woodward, Inc. | Unsupported piston with moving seal carrier |
US11512719B2 (en) | 2017-07-14 | 2022-11-29 | Woodward, Inc. | Unsupported piston with moving seal carrier |
CN111075986B (en) * | 2020-01-13 | 2022-01-21 | 宁波杜肯阀门制造有限公司 | Pneumatic actuator for driving regulating valve |
CN111075986A (en) * | 2020-01-13 | 2020-04-28 | 秦宪斌 | Pneumatic actuator for driving regulating valve |
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