WO2001016514A1 - Valve de regulation de fluide et plaque avec filtre - Google Patents
Valve de regulation de fluide et plaque avec filtre Download PDFInfo
- Publication number
- WO2001016514A1 WO2001016514A1 PCT/JP2000/005820 JP0005820W WO0116514A1 WO 2001016514 A1 WO2001016514 A1 WO 2001016514A1 JP 0005820 W JP0005820 W JP 0005820W WO 0116514 A1 WO0116514 A1 WO 0116514A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- valve
- plate
- filter
- port
- Prior art date
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
- 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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
- F15B13/0438—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being of the nozzle-flapper type
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
-
- 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
- Y10T137/794—With means for separating solid material from the fluid
- Y10T137/7976—Plural separating elements
-
- 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
- Y10T137/794—With means for separating solid material from the fluid
- Y10T137/8085—Hollow strainer, fluid inlet and outlet perpendicular to each other
-
- 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
- Y10T137/794—With means for separating solid material from the fluid
- Y10T137/8122—Planar strainer normal to flow path
-
- 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
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/8659—Variable orifice-type modulator
- Y10T137/86598—Opposed orifices; interposed modulator
-
- 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
- Y10T137/877—With flow control means for branched passages
- Y10T137/87885—Sectional block structure
Definitions
- the present invention relates to a fluid control valve for controlling a fluid pressure, and more particularly to a fluid control valve provided with a filter and a plate with a filter used for the fluid control valve.
- FIG. 1 is a diagram showing an example of a cross-sectional configuration of a conventional fluid control valve of this type.
- the fluid control valve uses a high-pressure fluid as a control fluid for controlling an actuator such as a cylinder and a motor, and uses the high-pressure fluid as a drive source for driving a spool. That is, the high-pressure fluid guided from the high-pressure fluid supply port 201 of the valve block 200 to the supply port 102 of the valve body 101 of the fluid control valve 100 is used as a control fluid, The high-pressure fluid is branched inside the valve body 101, guided to the nozzles 106, 107 side of the nozzle flapper mechanism 105 via the throttles 103, 104, and the spool 108 is moved. It is used as a driving pressure source.
- the fluid flowing to the throttles 103 and 104 and the nozzles 106 and 107 is once filtered by a filter 109 provided in the valve body 101.
- the fluid flowing to the nozzles 106 and 107 passes through narrow gaps such as the throttles 103 and 104 and the nozzles 106 and 107.When particles are clogged in these gaps, fluid control is performed. This will impair the normal function of the valve. In order to avoid such inconvenience, a filter 109 is provided on the valve body 101.
- the fluid control valve with the filter body 109 incorporated in the valve body 101 is used to replace the filter 109 when particles are clogged in the filter 109 or during maintenance.
- a complicated operation of disassembling the fluid control valve 100 is required.
- the fluid control valve 100 does not function, and the system using the same does not operate, thus lowering the operating rate of the system.
- another fluid control valve 100 is necessary. In this case, the operation of the system may need to be re-adjusted due to the difference between the individual fluid control valves.
- a filter 109 is detachably provided in the valve body 101 to facilitate replacement. This can reduce the maintenance time and is effective in improving the operation rate of the system.
- a complicated flow path is formed inside the valve body 101, and if a filter can be further attached to and detached from the valve body 101, the number of processings to the valve body 101 will increase, Increases cost.
- the present invention has been made in view of the above circumstances, and eliminates the above-described problems.
- the purpose is to provide.
- a fluid control valve having a valve body provided with a plurality of ports and a valve body formed with ports corresponding to the ports of the valve block.
- a plate is provided between the valve block and the valve body, a flow path communicating the port of the valve block and the port of the valve body is formed in the plate, and a filter is disposed in the flow path.
- a flow path for branching the high-pressure fluid from the valve block into a control fluid and a pilot fluid is formed inside the plate, and a plate is formed in the valve body.
- a pilot port for introducing a pilot fluid from the plate is provided, and a filter is provided on the pilot flow path of the plate.
- the valve body has a static pressure bearing for supporting the spool, and high-pressure fluid from a pilot port is introduced into the static pressure bearing. .
- a plate is provided between the valve block and the valve body, and a filter is provided in a flow path communicating each port of the valve block of the plate with each port of the valve body.
- valve body can be made smaller, and the manufacturing cost of the valve body can be reduced.
- the system can be operated by preparing only two inexpensive plates with fillers, so that the cost of the entire system can be reduced.
- the system can be operated only by preparing two inexpensive plates with filters, so that the cost of the entire system can be reduced.
- a filter is separately provided in a control channel of the plate, and a filter having different filtration accuracy is provided on the pilot channel and the control channel.
- separate filters are provided for the control flow path and the pilot flow path inside the plate, thereby performing independent filtering of the control fluid flowing in the control flow path and the pilot fluid flowing in the pilot flow path. be able to.
- the filtering of the pilot fluid not only the filtering of the pilot fluid but also the filtering of the control fluid can be performed, so that the reliability of the entire system can be improved.
- the pilot fluid and the control fluid can be filtered independently, It is possible to select a filter having a filtering performance suitable for the condition.
- the fluid control valve is detachably mounted between a valve block provided with a plurality of ports and a valve body provided with ports corresponding to the respective ports of the valve block.
- a plate is provided, wherein a flow path communicating the port of the valve block and the port of the valve body is formed, and a filter is disposed in the flow path.
- the plate attached between the valve block and the valve body is a plate with a filter provided with a filter in the flow path formed therein, so that this plate can be connected to the valve block and the valve body.
- a fluid control valve with a filter can be configured simply by mounting it in between.
- FIG. 1 is a cross-sectional view showing a configuration example of a conventional fluid control valve.
- FIG. 2 is a sectional view showing an example of a sectional configuration of the fluid control valve according to the present invention.
- FIG. 3 is a cross-sectional view illustrating a cylindrical filter of the fluid control valve according to the present invention and a method of mounting the same.
- FIG. 4 is a sectional view showing a configuration example of the fluid control valve according to the present invention.
- FIG. 5 is a sectional view showing a configuration example of a fluid control valve according to the present invention.
- FIG. 6 is an enlarged cross-sectional view of a portion of the fluid control valve according to the present invention, in which a disk-type filter is attached to a plate.
- FIG. 7 is a cross-sectional view showing a configuration example of a fluid control valve when a plate without a filter is used.
- Valve block 11: Supply port, 12: Control port, 13: Control port, 20: Plate, 21, 22, 23: Channel, 24, 25: Fill, 26: Cap screw, 27: Screw hole, 28: Plug, 29: Filter, 30: Valve body, 31: Supply port, 32, 33: Control port, 34, 35: Pilot port, 36, 37: Pilot flow path, 38: Sleeve, 39: Spool , 40, 41: Static pressure bearing, 42, 43: Bearing throttle, 44, 45: Throttle, 50: Nozzle flapper mechanism, 51, 52: Nozzle, 53: Turkmo, 54: Flapper, 60: Displacement Sensor, 62: O-ring.
- FIG. 2 is a diagram showing an example of a cross-sectional configuration of a flow control valve according to the present invention.
- This fluid control valve has a configuration in which a valve body 30 is attached to a valve block 10 via a plate 20.
- a nozzle flapper mechanism 50 is attached to an upper portion of the valve body 30, and a displacement sensor 60 is attached to a side portion of the valve body 30.
- the plate 20 communicates with the supply port 11 of the valve block 10 and the control ports 12 and 13 corresponding to the supply port 31 and the control ports 32 and 33 of the valve body 30, respectively.
- the flow paths 21, 22, and 23 are formed. Of the three flow paths, the flow path 21 is branched into three, one to the supply port 31 of the valve body 30, and the other two to the pilot port 34, which is led to the nozzle flapper mechanism 50. It is communicated to 3-5. Cylindrical filters 24, 25 are arranged at the branch of the flow path 21 communicating with the pilot ports 34, 35.
- FIG. 3 is a cross-sectional view for explaining the arrangement and mounting method of the cylindrical filter 24. The same applies to the cylindrical filter 25, and the description is omitted.
- the cylindrical filter 24 is fixed to the plate 20 by a hollow holding screw 26 engaging with a screw hole 27 formed in the plate 20.
- the high-pressure fluid that has flowed into the flow path 21 from the supply port 11 of the valve block 10 is filtered by the filter 24 when flowing inward from the outer periphery of the cylindrical filter 24 as shown by the arrow A. Then, it flows into pilot port 34. That is, to the pilot ports 34 and 35, the working fluid from which particles have been removed after being filtered by the filters 24 and 25 is supplied.
- the end of the screw hole 27 is sealed with a plug 28.
- the filter 24 can be removed from the plate 20. Therefore, replacement and cleaning of the filters 24 and 25 can be easily performed.
- valve body 30 When the filters 24 and 25 are exchanged and washed, the valve body 30 can be operated immediately by exchanging another plate 20 equipped with a new filter 24 or 25. Alternatively, as shown in FIG. 7, the valve body 30 can be operated immediately by replacing it with a plate 20 having only a branched flow path without a filter. Can be
- the flow rate of the fluid flowing through the pilot ports 34, 35 and the pilot flow paths 36, 37 to the nozzles 51, 52 of the nozzle flapper mechanism 50 is not large, but is always flowing.
- the filters 24 and 25 are fine, having a fineness of about several microns, and preferably have a large filtration area. For this reason, a cylindrical filter is selected here. Since this cylindrical filter has a filtration area covering the entire surface of the cylinder, the filtration area can be increased while being small.
- a spool 39 is slidably fitted in the sleeve 38 with a predetermined gap.
- the nozzle flapper mechanism 50 includes nozzles 51, 52, a trick motor 53, and a flapper 54.
- the displacement sensor 60 is provided with an amplifier including a feedback circuit, an amplification circuit, and the like (not shown) for detecting the position of the spool 39 and controlling the position of the spool 39 by electric feedback.
- the spool 39 When the spool 39 is displaced, the flow path formed by these is switched, and the supply port 31 communicates with one of the control ports 32, 33. At the same time, the other control port communicates with the tank port (not shown). In addition, the opening area of each is adjusted according to the position of the spool 39 to control the flow rate therethrough and the pressure applied to the control ports 32 and 33.
- an actuator such as a cylinder motor to the control port 32 between the control port 32 and the control port 33, the high-pressure fluid is supplied to and discharged from the actuator, and the operation is controlled. By controlling the pressure difference, the generated force of the actuator can be controlled.
- the high-pressure fluid supplied to the pilot ports 34, 35 flows through the throttles 44, 45 into the spaces at both ends of the spool 39, and further flows through the pilot channels 36, 37 to the nozzle 5 It is guided to 1, 52 and is ejected from the nozzles 51, 52. At this time, the distance between the flapper 54 facing the tip of each nozzle 51 and 52 and the surface of the flapper 54 is changed by the torque motor 53 to provide resistance to the flow ejected from the nozzles 51 and 52. Yotsu Thus, a pressure difference is created upstream of the nozzles 51 and 52, that is, in the spaces at both ends of the spool 39. The spool 39 is driven by this differential pressure.
- FIG. 4 is a cross-sectional view illustrating another configuration example of the fluid control valve according to the present invention.
- This fluid control valve is provided with hydrostatic bearings 40 and 41 at both ends of a spool 39.
- the valve body 30 is attached to the valve block 10 via the plate 20 and the flow path formed in the plate 20 is the same.
- the flow path branched from the flow path 21 communicating with the supply port 11 communicates with the pilot ports 34, 35 of the valve body 30 via filters 24, 25 as shown in Fig. 2. It is the same as the control valve, except that the pilot ports 34, 35 communicate with the hydrostatic bearings 40, 41 depending on the internal flow path of the valve body 30.
- the high-pressure fluid supplied to the hydrostatic bearings 40, 41 flows through the bearing throttles 42, 43 of the hydrostatic bearings 40, 41 and the gap between the spool 39 and the sleeve 38.
- the static pressure bearing throttles 42 and 43 may be clogged, or if they are caught in the gap between the spool 39 and the sleeve 38, the spool 39 may not operate smoothly. Occurs. Therefore, by filtering the working fluid with the filters 24 and 25 provided in the plate 20, the above-described problem can be prevented.
- FIG. 5 is a sectional view showing another configuration example of the fluid control valve according to the present invention.
- This flow system control valve is provided with a disk-shaped filter 29 (enlarged in FIG. 6) at the inlet of the flow path 21 communicating with the supply port 11 of the plate 20, and a downstream branch of the filter 29.
- Filters 24 and 25 are provided on two pilot flow paths of the flow paths, respectively.
- the disk-type filter 29 filters the fluid flowing in both the control flow and the pilot flow.
- FIG. 6 is an enlarged cross-sectional view of a portion where the disk-type filter 29 is attached to the plate 20 (an enlarged view of a portion B in FIG. 5).
- the filter 29 includes a ring-shaped base 29 a and a metal mesh 29 b caulked to the base.
- the filter 29 is fitted and fixed in a concave portion provided in the inlet of the flow path 21 of the plate 20.
- You. Phil Evening 2 9 A valve with a small pressure loss is selected according to the control flow rate of the body control valve. In general, the control flow rate is often larger than the pilot flow rate. Therefore, a mesh with a coarser mesh (filtration accuracy) than the downstream filters 24 and 25, for example, a mesh of about 100 microns, should be selected.
- 62 is an o-ring interposed between the valve block 10 and the plate 20.
- the disk-shaped filter 29 in the former stage has the effect of preventing large particles from flowing into the control flow rate side, and also has the effect of extending the life of the filter on the downstream pilot flow path.
- the fluid control valve shown in Fig. 5 is a case in which filters are provided in both the control flow path and the pilot flow path.
- the fluid control valve provided with hydrostatic bearings 40 and 41 is provided.
- a disk-type filter may be provided at the inlet of the flow path 21 communicating with the supply port 11 formed in the plate 20 of the valve.
- a plate is provided between the valve block and the valve body, and a filter is provided in a flow path communicating each port of the valve block of the plate with each port of the valve body.
- valve body compared to a conventional valve body with a built-in filter body, the internal flow path of the valve body is simplified, the valve body can be downsized, and the manufacturing cost of the valve body can be reduced. .
- control fluid and the pilot flow channel flowing through the control flow channel are provided by separately providing filters for the control flow channel and the pilot flow channel inside the plate. Independent filtering of the flowing pilot fluid can be performed.
- the plate attached between the valve block and the valve body is a plate with a filter provided with a filter in a flow path formed therein, and the plate is used as the plate. Since it is mounted between the valve block and the valve body, a fluid control valve having the above-described effects can be configured.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Details Of Valves (AREA)
- Servomotors (AREA)
- Valve Housings (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK00955087T DK1249651T3 (da) | 2000-08-29 | 2000-08-29 | Fluidstyreventil og plade med filter |
US10/069,789 US6648014B1 (en) | 1999-09-01 | 2000-08-29 | Fluid control valve and plate with filter |
DE60016463T DE60016463T2 (de) | 1999-09-01 | 2000-08-29 | Fluidregelventil und platte mit einem filter |
EP00955087A EP1249651B1 (en) | 1999-09-01 | 2000-08-29 | Fluid control valve and plate with filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/247972 | 1999-09-01 | ||
JP24797299A JP2001074162A (ja) | 1999-09-01 | 1999-09-01 | 流体制御弁及びフィルタ付きプレート |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001016514A1 true WO2001016514A1 (fr) | 2001-03-08 |
Family
ID=17171301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005820 WO2001016514A1 (fr) | 1999-09-01 | 2000-08-29 | Valve de regulation de fluide et plaque avec filtre |
Country Status (5)
Country | Link |
---|---|
US (1) | US6648014B1 (ja) |
EP (1) | EP1249651B1 (ja) |
JP (1) | JP2001074162A (ja) |
DE (1) | DE60016463T2 (ja) |
WO (1) | WO2001016514A1 (ja) |
Families Citing this family (17)
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JP4168383B2 (ja) * | 2003-02-25 | 2008-10-22 | アイシン精機株式会社 | フィルタ付き弁 |
US20050084387A1 (en) * | 2003-10-15 | 2005-04-21 | Sauer-Danfoss Inc. | Control system for hydrostatic pump |
JP5225982B2 (ja) * | 2006-05-15 | 2013-07-03 | トマス・ジェイ・ホリス | デジタル方式の回転式制御弁 |
CN100441887C (zh) * | 2006-10-30 | 2008-12-10 | 华中科技大学 | 水压伺服阀 |
DE102010011834A1 (de) * | 2010-03-18 | 2011-09-22 | Schaeffler Technologies Gmbh & Co. Kg | Filterelement und Steuerventil für ein Nockenwellenverstellsystem |
FR2981133B1 (fr) * | 2011-10-10 | 2013-10-25 | In Lhc | Procede de detection de defaillance d'une servovalve et servovalve faisant application. |
US9404513B2 (en) | 2014-04-10 | 2016-08-02 | Woodward, Inc. | Servo valve |
JP6286307B2 (ja) * | 2014-07-24 | 2018-02-28 | Kyb株式会社 | 方向制御弁 |
EP3293401B1 (en) * | 2016-09-12 | 2019-07-24 | Hamilton Sundstrand Corporation | Nozzle with locking nut |
EP3431780B1 (en) * | 2017-07-20 | 2020-04-15 | Hamilton Sundstrand Corporation | Servovalve |
EP3473865B1 (en) | 2017-10-19 | 2023-08-30 | Hamilton Sundstrand Corporation | Nozzle assembly with filter for a servovalve |
EP3552763B1 (en) * | 2018-04-10 | 2023-01-04 | Hamilton Sundstrand Corporation | Filter retaining plug |
EP3587832B1 (en) | 2018-06-24 | 2024-04-03 | Hamilton Sundstrand Corporation | Servo valve housing |
EP3715687B1 (en) * | 2019-03-29 | 2021-10-13 | Hamilton Sundstrand Corporation | Servo valves |
JP2022092363A (ja) * | 2020-12-10 | 2022-06-22 | 住友重機械工業株式会社 | スプール型流量制御弁およびその製造方法 |
CN114033774A (zh) * | 2021-12-01 | 2022-02-11 | 通用技术集团机床工程研究院有限公司 | 一种板式叠加过滤器 |
DE102022206789A1 (de) | 2022-07-04 | 2024-01-04 | Robert Bosch Gesellschaft mit beschränkter Haftung | Stellventil |
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JPH10259803A (ja) * | 1997-03-19 | 1998-09-29 | Ishikawajima Harima Heavy Ind Co Ltd | 直動型2段式サーボ弁 |
JP2000283112A (ja) * | 1999-03-31 | 2000-10-13 | Kawasaki Steel Corp | 油圧サーボ弁 |
-
1999
- 1999-09-01 JP JP24797299A patent/JP2001074162A/ja active Pending
-
2000
- 2000-08-29 EP EP00955087A patent/EP1249651B1/en not_active Expired - Lifetime
- 2000-08-29 WO PCT/JP2000/005820 patent/WO2001016514A1/ja active IP Right Grant
- 2000-08-29 US US10/069,789 patent/US6648014B1/en not_active Expired - Fee Related
- 2000-08-29 DE DE60016463T patent/DE60016463T2/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4267862A (en) * | 1979-02-21 | 1981-05-19 | Mac Valves, Inc. | Directional control valve with flow path through valve spool |
JPH02102982A (ja) * | 1988-10-06 | 1990-04-16 | Matsushita Electric Ind Co Ltd | ガスフィルター |
JPH02101185U (ja) * | 1989-01-30 | 1990-08-13 | ||
JPH02146262U (ja) * | 1989-05-17 | 1990-12-12 | ||
JPH08270820A (ja) * | 1995-03-30 | 1996-10-15 | Ckd Corp | カートリッジバルブ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1249651A4 * |
Also Published As
Publication number | Publication date |
---|---|
DE60016463T2 (de) | 2005-12-15 |
EP1249651A1 (en) | 2002-10-16 |
US6648014B1 (en) | 2003-11-18 |
EP1249651B1 (en) | 2004-12-01 |
DE60016463D1 (de) | 2005-01-05 |
JP2001074162A (ja) | 2001-03-23 |
EP1249651A4 (en) | 2002-10-24 |
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