WO2011112096A1 - Hydraulic control valve with two valve slides - Google Patents
Hydraulic control valve with two valve slides Download PDFInfo
- Publication number
- WO2011112096A1 WO2011112096A1 PCT/NO2011/000074 NO2011000074W WO2011112096A1 WO 2011112096 A1 WO2011112096 A1 WO 2011112096A1 NO 2011000074 W NO2011000074 W NO 2011000074W WO 2011112096 A1 WO2011112096 A1 WO 2011112096A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- slide
- hydraulic control
- control valve
- electromechanically actuated
- Prior art date
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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/048—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with valve seats positioned between movable valve members
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0405—Valve members; Fluid interconnections therefor for seat valves, i.e. poppet valves
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/202—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with concentric handles
-
- 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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8158—With indicator, register, recorder, alarm or inspection means
- Y10T137/8225—Position or extent of motion indicator
- Y10T137/8242—Electrical
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87169—Supply and exhaust
- Y10T137/87217—Motor
Definitions
- control valve includes a first and a second axially movable valve slide which are, independently of each other, arranged to sealingly abut corresponding portions of a double valve seat, each valve slide being provided with a slide nut which is in engagement with an external threaded portion on the valve slide and is connected via transmission means to an actuator, and there being a position sensor connected to each valve slide and arranged to indicate a rotational motion of the valve slide.
- the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art, or at least provide a useful alternative to the prior art.
- the invention is to reduce hydraulic pressure shocks and give the possibility of intelligent, hydraulic control and regulation of hydraulic power at high pressures and high fluid flow rates.
- the valve is used as a directional control valve with control of the opening and shutting characteristic of the valve to avoid pressure shocks in the hydraulic system, or as a regulator for hydraulic pressure or fluid flow connected to an electronic control which includes pressure transmitters or flow gauges.
- the valve according to the invention provides a useful alternative to the prior art by operation of hydraulic functions with high hydraulic operating pressure and large fluid flow.
- the invention is well suited as directional control valve and regulator in actuation systems for subsea well equipment, such as blowout preventers for subsea drilling and well completion and for subsea well intervention equipment.
- the invention may have other applications for equipment installed on the surface.
- subsea control modules may be equipped with manifold mounted hydraulic directional control valves, with solenoids operated from the surface by way of an electronic communication solution, so that hydraulic power may be directed to actuation systems on the subsea equipment as an on/off function.
- the directional control valve operates a pilot-controlled hydraulic valve which is dimensioned for the function in question. This is an on/off function without damping.
- the invention relates more specifically to an electromechani - cally actuated, hydraulic control valve with a slide pair arranged in a valve housing in fluid communication with at least three hydraulic-fluid ports, characterized by
- a first and a second axially movable valve slide being arranged, independently of each other, to sealingly abut corresponding portions of a double valve seat
- each valve slide being provided with a slide nut which is in engagement with an external threaded portion on the valve slide and is connected, via transmission means, to an actuator, and
- each valve slide there being, connected to each valve slide, a position sensor arranged to indicate a rotational motion of the slide nut .
- the second valve slide may be provided with a centric through bore, and the first valve slide is arranged in said bore in the second valve slide.
- the actuator may be an electromotor.
- the valve slide may be provided with rotation-preventing means, at least one anti -rotation bolt extending substantially radially out from the valve slide into an elongated, axially oriented recess in an adjacent valve housing element.
- the valve slides may be provided with rotation-preventing means, at least one anti- rotation bolt extending substantially radially out from the first valve slide, through an axially oriented, elongated groove in the second valve slide and into an elongated, axially oriented recess in an adjacent valve housing element.
- the slide nut may be taken from the group consisting of roller nuts and ball nuts.
- a slide gasket may provide a seal between the jacket surface of the first valve slide and the internal wall of the second valve slide.
- Each of the actuators may be connected to a control system.
- the position sensor may be an inductive sensor.
- the valve is operated steplessly and is programmed for an opening and closing characteristic with an optimum speed for the valve function.
- the valve has an alternative application as a regulator for hydraulic pressure or fluid flow. Physically, the design of the valve is the same.
- the regulating function is a function of software and processing of signals from pressure or flow gauges.
- valve By the use of the valve as a hydraulic regulator, hysteresis due to friction is avoided. This is a known problem with mechanical regulators.
- Figure 1A shows a longitudinal section of the valve with actuating devices
- Figure IB shows the valve housing in a sectional view
- Figure 1C shows actuating devices and mounting arrangements in a sectional view
- Figure ID shows details of the mounting arrangement for the slide nut in a sectional view
- Figure 2A shows a side view of the valve arrangement according to the invention
- FIGS 2B and 2C show perspective views of the valve arrangement in which an actuator casing has been removed for reasons of exposition;
- Figure 3A shows a longitudinal section of an alternative valve embodiment
- Figure 3B shows a sectional view of a valve housing according to the alternative embodiment of the valve arrangement .
- the reference numeral 1A indicates a first embodiment of an electromechanically actuated, hydraulic control valve 1 with a valve housing 2A with an admission port 2B, an outlet port 2C and a return port 2D for hydraulic fluid, a double valve seat 5A, two valve slides 4B, 6D, and appurtenant slide bearings 4A, 6A.
- the valve slides 4B, 6D are provided with sealing cones, known per se, at a first end and an actuating part projecting from the valve housing 2A.
- the first valve slide 4B is arranged in a centric through bore in the second valve slide 6D.
- a slide nut 4E, 6E is connected, surrounding a portion of the valve slide 4B, 6D, the slide nut 4E, 6E being formed as a roller nut or a ball nut.
- the choice of nut type depends on what pitch a threaded portion on the valve slide has got.
- the slide nuts 4E, 6E are connected to respective electric motors 4G, 61 with slide gears 4D, 6F, respectively, and gearwheel transmissions 4F, 6H, respectively.
- the actuating devices of the slides 4B, 6D are surrounded by an actuator casing 3A provided with an end cap 3C.
- the actuator casing 3A fits tightly against the valve housing 2A by means of a first gasket set 3B and is attached to the valve housing 2A by means of attachment screws 3E.
- the end cap 3C fits tightly against the actuator casing 3A by means of a second gasket set 3D and is attached to the actuator casing 3A by means of attachment screws 3E.
- the actuator casing 3A is pressure-compensated by means of an integrated pressure compensator 3F.
- Figure IB shows a detail of the valve housing 2A.
- a first slide bearing 4A for the first valve slide 4B is formed, provided with a fluid bore which communicates with the inlet port 2B.
- a double valve seat 5A for, respectively, the supply and return of hydraulic fluid is provided with a fluid bore which is connected to the outlet port 2C.
- the double valve seat 5A is provided with external valve housing gaskets 5B sealing against the valve housing 2A.
- a slide bearing 6A for the second valve slide 6D is placed at the return port 2D of the valve.
- the slide bearing 6A is provided with a fluid bore which communicates with the return port 2D.
- the first valve slide 4B moves at the centre of the hollow second valve slide 6D.
- the first and second valve slides 4B and 6D, respectively, are moved by the actuating devices of the valve 1, the valve slides 4B, 6D projecting through an opening at the centre of a valve housing end cover 7A which is screwed to a recess in the valve housing 2A by attachment screws 7B .
- two anti- rotation bolts 7C in the form of screws screwed into threaded holes in the valve slide 4B project substantially radially outwards, and the anti-rotation bolts extend through elongated, axially oriented grooves in the second, outer valve slide 6D and into elongated, axially oriented recesses in the end cover 7A.
- the anti-rotation bolts 7C prevent the valve slides from turning, whereas the recesses in the end cover 7A and the grooves in the second valve slide 6D enable axial displacement of the valve slides 4B, 6D.
- barrier seals separate the pressurized valve housing 1 from the pressure-compensated space in which the actuating devices are placed: a) an outer, second slide bearing gasket 6B between the valve housing 2A and the second slide bearing 6A, b) an inner, second slide bearing gasket 6C between the second valve slide 6D and the second slide bearing 6A, and c) a slide gasket 4K which provides a seal between the jacket surface of the first, inner valve slide 4B and the internal wall of the second, outer valve slide 6D.
- first slide nut bearings 41, 4J are connected to first slide nut 4C.
- second slide nut bearings 6K, 6M are connected to the second slide nut 6E.
- FIG. 2B shows, in perspective, the mounting arrangement for the actuating devices of the valve 1.
- Spacing bolts 8A are secured in threaded holes in the valve housing 2A.
- a mounting arrangement 8B for the slide nut bearings 41, 6M between the two slide nuts 4C, 6E forms, together with second spacing bolts 8D, an attachment for the second slide gear 6F as well.
- a mounting arrangement 8E for the first slide gear 4D together with third spacing bolts 8F formed an attachment for an end plate 8G for the first slide nut 4C, the third spacing bolts 8F being secured with attachment screws 8H.
- springs 8C are placed between the mounting arrangement 8B and the slide nut bearings 41, 6M to keep the arrangement pre-tensioned .
- Figure 2A shows the outside of the cylindrical actuator casing 3A enclosing the actuating device for the first and second valve slides 4B, 6D.
- a cable connection (not shown) extends through a cable bushing 9 for signal and electrical-power supply cables.
- the actuator casing 3A is filled with an electrically insulating medium, for example silicone oil, and is pressure-compensated against the surrounding seawater pressure via the pressure compensator 3F.
- FIGS 2B and 2C show the valve 1 with the internal actuating devices in perspective, the actuator casing having been removed for reasons of exposure .
- Figure 1C shows a longitudinal section of the actuating devices.
- the two slide nuts 4C, 6E are attached to the mounting arrangement with slide nut bearings 41, 4J, 6K, 6M at either end.
- One second slide nut bearing 6K is placed between a distance plate 6L and the end cover 7A of the valve housing.
- Yet another second slide nut bearing 6M is placed between the second slide nut 6E and the mounting arrangement 8B .
- one first slide nut bearing 41 is placed between the mounting arrangement 8B and the first slide nut 4C.
- a further first slide nut bearing 4J is placed between the first slide nut 4C and the end plate 8G.
- the second slide nut 6E is in engagement with a threaded portion on the second valve slide 6D.
- the slide nut 6E is rotated by a second electromotor 61 via a second slide gearwheel 6G externally on the second slide nut 6E, a second intermediate drive gear 6H, and a second slide gear 6F on the motor shaft .
- the first slide nut 4C is in engagement with a threaded portion on the first valve slide 4B.
- the slide nut 4C is rotated by a first electromotor 4G via a first slide gearwheel 4E externally on the first slide nut 4C, a first intermediate drive gear 4F, and a first slide gear 4D on the motor shaft as shown in figure 1A.
- Two position sensors 4H, 6J, respectively, for example indue- tive sensors, are used to register turns of the slide gearwheels 4E, 6G on the slide nuts 4C, 6E.
- valve 1 When the valve 1 is used as an "intelligent" directional control valve to operate a double-acting hydraulic actuator function, two valves may be used, or the valve 1 can be used exclusively for critical functions like disconnection or cutting functions, whereas the less demanding hydraulic return stroke of the actuator device is operated by some prior art.
- the return port 2D is first closed by the second valve slide 6D being actuated so that the sealing cone on the end of the valve slide 6D is pressed against the return side of the valve seat 5A and seals against this.
- the valve 1 is then opened to hydraulic supply from the admission port 2B by the first valve slide 4B being actuated so that the sealing cone on the valve slide 4B is moved away from the valve seat 5A and hydraulic fluid is flowing through the fluid bore of the first slide bearing 4A past the seat 5A and the sealing cone on the first valve slide 4B and further through the fluid bore of the seat 5A to the outlet port 2C.
- the first valve slide 4B is actuated in accordance with a preprogrammed opening characteristic.
- the admission to the valve 1 is first closed by the first valve slide 4B being actuated so that the sealing cone on the end of the valve slide 4B is pressed against the supply side of the valve seat 5A and seals against this.
- the second valve slide 6D is actuated, so that the sealing cone on the valve slide 6D is moved away from the return side of the valve seat 5A, and hydraulic fluid is flowing from the outlet side of the valve 1 through the fluid bore of the seat 5A, past the return side of the valve seat 5A and the sealing cone on the second valve slide 6D and out through the fluid bore in the second slide bearing 6A to the return port 2D.
- the valve 1 may also be operated as a regulator for hydraulic pressure or fluid flow. There is no physical difference in the equipment, the different lies in the valve 1 being operated as a regulator by means of a regulating function in software and signals from pressure transmitters or flow gauges (not shown) for continuous feedback to the control function, so that the valve 1 is adjusted automatically in relation to the set point of the control system for the regulated pressure or fluid flow desired.
- the opening and closing sequences of the valve 1 function in a manner equal to that described above also when the valve is used for regulating purposes.
- Figure 3A shows a solution which is different from the solution in figure 1A in that the first and second valve slides 12B, 13B, respectively, are actuated from their respective ends of the valve housing 11A.
- the valve housing 11A is provided with a mounting surface at either end for the attachment of the actuator casings 3A enclosing each of the actuating devices.
- the valve function is
- FIG. 3B shows that the valve housing 11A is provided with two channels HE, 11F.
- a fluid channel HE connects the two fluid- filled spaces for the actuating devices, so that in a subsea embodiment they are pressure-compensated by means of the common compensator 3F.
- a cable duct 11F is arranged for internal cable passage between the casings on either end of the valve housing.
- Admission port 11B outlet port 11C, return port 11D, first slide bearing 12A, slide nut 12C, slide gear 12D, slide nut gearwheel 12E, in- termediate drive gear 12F, electromotor 12G, slide nut bearings 12H and 121, position sensor 12J and second slide bearing 13A.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Mechanically-Actuated Valves (AREA)
- Valve Housings (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/582,872 US8919374B2 (en) | 2010-03-06 | 2011-03-03 | Hydraulic control valve with two valve slides |
EP11753674.8A EP2545313B1 (en) | 2010-03-06 | 2011-03-03 | Hydraulic control valve with two valve slides |
AU2011224923A AU2011224923B2 (en) | 2010-03-06 | 2011-03-03 | Hydraulic control valve with two valve slides |
BR112012022701-7A BR112012022701B1 (en) | 2010-03-06 | 2011-03-03 | hydraulic control valve, electromechanically operated |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20100319 | 2010-03-06 | ||
NO20100319 | 2010-03-06 | ||
NO20110327A NO331748B1 (en) | 2010-03-06 | 2011-03-02 | Hydraulic control valve with two valve guides |
NO20110327 | 2011-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011112096A1 true WO2011112096A1 (en) | 2011-09-15 |
Family
ID=44563705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2011/000074 WO2011112096A1 (en) | 2010-03-06 | 2011-03-03 | Hydraulic control valve with two valve slides |
Country Status (6)
Country | Link |
---|---|
US (1) | US8919374B2 (en) |
EP (1) | EP2545313B1 (en) |
AU (1) | AU2011224923B2 (en) |
BR (1) | BR112012022701B1 (en) |
NO (1) | NO331748B1 (en) |
WO (1) | WO2011112096A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014143784A2 (en) * | 2013-03-15 | 2014-09-18 | Kap Medical | Bidirectional fluid flow valve and method |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11266265B2 (en) | 2014-06-09 | 2022-03-08 | Gideon Duvall | Device and system for creating infused beverages |
WO2015191648A1 (en) * | 2014-06-09 | 2015-12-17 | Gideon Duvall | Device and system for creating infused beverages |
WO2017189628A1 (en) * | 2016-04-25 | 2017-11-02 | Gideon Duvall | Controlled system for brewing infused beverages |
CN114593100B (en) * | 2022-03-23 | 2022-12-06 | 中国矿业大学 | Plug-in type water pressure digital throttle valve with independently controlled load port and control method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2190726Y (en) * | 1994-01-14 | 1995-03-01 | 常州电站辅机总厂 | Electric driving device for valve |
Family Cites Families (11)
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GB1244158A (en) | 1967-10-18 | 1971-08-25 | Tecalemit Engineering | Fluid displacement unit |
SE371017B (en) * | 1972-02-11 | 1974-11-04 | H Thorbard | |
US3884259A (en) * | 1974-01-21 | 1975-05-20 | Cryogenic Technology Inc | Three-way valve for controlling the flow of fluids at cryogenic temperature and at widely different pressures |
JPH0689858B2 (en) * | 1987-10-07 | 1994-11-14 | 株式会社鷺宮製作所 | Stepping motor valve and operating method thereof |
US4775133A (en) * | 1987-10-19 | 1988-10-04 | American Standard Inc. | Electric air valve |
US4809742A (en) * | 1988-04-18 | 1989-03-07 | Pneumo Abex Corporation | Control valve assembly including valve position sensor |
US4984505A (en) * | 1989-02-01 | 1991-01-15 | Woodward Governor Company | Multiplexed hydraulic control systems |
US6003837A (en) * | 1996-02-20 | 1999-12-21 | Bray International, Inc. | Valve actuator |
US7066189B2 (en) * | 2002-12-20 | 2006-06-27 | Control Components, Inc. | Predictive maintenance and initialization system for a digital servovalve |
US6923212B2 (en) * | 2003-01-03 | 2005-08-02 | Control Components, Inc. | Fail safe apparatus for a direct-drive servovalve |
DE102006036294A1 (en) * | 2006-08-03 | 2008-02-07 | Inter Control Hermann Köhler Elektrik GmbH & Co. KG | Gas valve controlling method for use in e.g. gas chimney, involves designing and arranging valve and linear drive in such manner that electronic control detects opening/closing of valve by current/voltage measurements |
-
2011
- 2011-03-02 NO NO20110327A patent/NO331748B1/en unknown
- 2011-03-03 AU AU2011224923A patent/AU2011224923B2/en active Active
- 2011-03-03 WO PCT/NO2011/000074 patent/WO2011112096A1/en active Application Filing
- 2011-03-03 US US13/582,872 patent/US8919374B2/en active Active
- 2011-03-03 BR BR112012022701-7A patent/BR112012022701B1/en active IP Right Grant
- 2011-03-03 EP EP11753674.8A patent/EP2545313B1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2190726Y (en) * | 1994-01-14 | 1995-03-01 | 常州电站辅机总厂 | Electric driving device for valve |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014143784A2 (en) * | 2013-03-15 | 2014-09-18 | Kap Medical | Bidirectional fluid flow valve and method |
WO2014143784A3 (en) * | 2013-03-15 | 2014-12-31 | Kap Medical | Bidirectional fluid flow valve and method |
US9662253B2 (en) | 2013-03-15 | 2017-05-30 | Kap Medical | Bidirectional fluid flow valve and method |
US10327971B2 (en) | 2013-03-15 | 2019-06-25 | Kap Medical | Bidirectional fluid flow valve and method |
Also Published As
Publication number | Publication date |
---|---|
EP2545313B1 (en) | 2017-11-22 |
US8919374B2 (en) | 2014-12-30 |
US20130056659A1 (en) | 2013-03-07 |
EP2545313A1 (en) | 2013-01-16 |
EP2545313A4 (en) | 2016-10-26 |
NO331748B1 (en) | 2012-03-19 |
AU2011224923A1 (en) | 2012-09-13 |
AU2011224923B2 (en) | 2014-05-22 |
NO20110327A1 (en) | 2011-09-07 |
BR112012022701A2 (en) | 2020-08-11 |
BR112012022701B1 (en) | 2021-04-20 |
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