DK137783A - Elektro-hydraulisk ventilanlaeg - Google Patents
Elektro-hydraulisk ventilanlaeg Download PDFInfo
- Publication number
- DK137783A DK137783A DK137783A DK137783A DK137783A DK 137783 A DK137783 A DK 137783A DK 137783 A DK137783 A DK 137783A DK 137783 A DK137783 A DK 137783A DK 137783 A DK137783 A DK 137783A
- Authority
- DK
- Denmark
- Prior art keywords
- control circuit
- electro
- cylinder
- valve system
- hydraulic valve
- 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
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
-
- 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
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/03—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type with electrical control means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
- F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
- F15B2211/328—Directional control characterised by the type of actuation electrically or electronically with signal modulation, e.g. pulse width modulation [PWM]
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6346—Electronic controllers using input signals representing a state of input means, e.g. joystick position
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6653—Pressure control
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6654—Flow rate control
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6656—Closed loop control, i.e. control using feedback
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/77—Control of direction of movement of the output member
- F15B2211/7733—Control of direction of movement of the output member providing vibrating movement, e.g. dither control for emptying a bucket
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/77—Control of direction of movement of the output member
- F15B2211/7741—Control of direction of movement of the output member with floating mode, e.g. using a direct connection between both lines of a double-acting cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
- Valve Device For Special Equipments (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Transplanting Machines (AREA)
- Actuator (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/364,373 US4437385A (en) | 1982-04-01 | 1982-04-01 | Electrohydraulic valve system |
Publications (2)
Publication Number | Publication Date |
---|---|
DK137783D0 DK137783D0 (da) | 1983-03-25 |
DK137783A true DK137783A (da) | 1983-10-02 |
Family
ID=23434235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK137783A DK137783A (da) | 1982-04-01 | 1983-03-25 | Elektro-hydraulisk ventilanlaeg |
Country Status (12)
Country | Link |
---|---|
US (1) | US4437385A (da) |
EP (1) | EP0091018B1 (da) |
JP (1) | JPH0610481B2 (da) |
AT (1) | ATE20690T1 (da) |
AU (1) | AU550989B2 (da) |
BR (1) | BR8301657A (da) |
CA (1) | CA1202100A (da) |
DE (1) | DE3364410D1 (da) |
DK (1) | DK137783A (da) |
ES (1) | ES520993A0 (da) |
MX (1) | MX155212A (da) |
ZA (1) | ZA832274B (da) |
Families Citing this family (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2525292B1 (fr) * | 1982-04-19 | 1986-12-19 | Chatelin Jacques | Servo-moteur hydraulique |
US4506700A (en) * | 1983-10-07 | 1985-03-26 | Deere & Company | Poppet valve with float function |
GB8426486D0 (en) * | 1984-10-19 | 1984-11-28 | Lucas Ind Plc | Electro-hydraulic actuator systems |
JPS62297502A (ja) * | 1986-06-18 | 1987-12-24 | Kuroda Precision Ind Ltd | 空気圧シリンダの駆動制御装置 |
US4741247A (en) * | 1986-09-17 | 1988-05-03 | Rexa Corporation | Pneumatic actuator apparatus |
AU603907B2 (en) * | 1987-06-30 | 1990-11-29 | Hitachi Construction Machinery Co. Ltd. | Hydraulic drive system |
DE3901475C2 (de) * | 1989-01-19 | 1994-07-14 | Danfoss As | Fluidgesteuerte Servoanordnung |
US5079989A (en) * | 1989-06-12 | 1992-01-14 | Vickers, Incorporated | Electrohydraulic valve system with a pressure feedback signal modulated by a velocity feedback signal when the velocity exceeds a veloity limit |
US4989495A (en) * | 1989-08-21 | 1991-02-05 | Hydra-Power Systems, Inc. | Hydraulic positioning system with normal and high supply and exhaust flow paths |
SE466712B (sv) * | 1990-07-24 | 1992-03-23 | Bo Andersson | Anordning vid hydraulmotor foer styrning av densamma |
US6131500A (en) * | 1997-12-05 | 2000-10-17 | Moncrief; Rick L. | System and method for producing motion |
US6325153B1 (en) | 1999-01-05 | 2001-12-04 | Halliburton Energy Services, Inc. | Multi-valve fluid flow control system and method |
US6691604B1 (en) | 1999-09-28 | 2004-02-17 | Caterpillar Inc | Hydraulic system with an actuator having independent meter-in meter-out control |
DE10006141A1 (de) | 2000-02-11 | 2001-09-06 | Zf Lenksysteme Gmbh | Elektrohydraulische Steuervorrichtung |
FR2807794B1 (fr) * | 2000-04-18 | 2003-02-14 | Crouzet Automatismes | Servovalve hydraulique a double boucle imbriquee |
ATE313016T1 (de) * | 2001-08-10 | 2005-12-15 | Zf Lenksysteme Gmbh | Steuereinrichtung für die kontinuierliche bewegung eines hydraulischen stellmotors |
US6694860B2 (en) | 2001-12-10 | 2004-02-24 | Caterpillar Inc | Hydraulic control system with regeneration |
KR20030052031A (ko) * | 2001-12-20 | 2003-06-26 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 건설중장비용 유압밸브의 제어장치 |
US6699311B2 (en) | 2001-12-28 | 2004-03-02 | Caterpillar Inc | Hydraulic quick drop circuit |
US6775974B2 (en) | 2002-09-25 | 2004-08-17 | Husco International, Inc. | Velocity based method of controlling an electrohydraulic proportional control valve |
US6880332B2 (en) | 2002-09-25 | 2005-04-19 | Husco International, Inc. | Method of selecting a hydraulic metering mode for a function of a velocity based control system |
US6732512B2 (en) | 2002-09-25 | 2004-05-11 | Husco International, Inc. | Velocity based electronic control system for operating hydraulic equipment |
US6779340B2 (en) | 2002-09-25 | 2004-08-24 | Husco International, Inc. | Method of sharing flow of fluid among multiple hydraulic functions in a velocity based control system |
US6718759B1 (en) | 2002-09-25 | 2004-04-13 | Husco International, Inc. | Velocity based method for controlling a hydraulic system |
US7440821B1 (en) * | 2004-01-02 | 2008-10-21 | Sauer-Danfoss Inc. | Method of determining average current in a PWM drive |
US7121189B2 (en) * | 2004-09-29 | 2006-10-17 | Caterpillar Inc. | Electronically and hydraulically-actuated drain value |
US7146808B2 (en) * | 2004-10-29 | 2006-12-12 | Caterpillar Inc | Hydraulic system having priority based flow control |
US7204084B2 (en) * | 2004-10-29 | 2007-04-17 | Caterpillar Inc | Hydraulic system having a pressure compensator |
US7441404B2 (en) | 2004-11-30 | 2008-10-28 | Caterpillar Inc. | Configurable hydraulic control system |
US7451685B2 (en) * | 2005-03-14 | 2008-11-18 | Husco International, Inc. | Hydraulic control system with cross function regeneration |
US7204185B2 (en) * | 2005-04-29 | 2007-04-17 | Caterpillar Inc | Hydraulic system having a pressure compensator |
US7243493B2 (en) * | 2005-04-29 | 2007-07-17 | Caterpillar Inc | Valve gradually communicating a pressure signal |
US7302797B2 (en) * | 2005-05-31 | 2007-12-04 | Caterpillar Inc. | Hydraulic system having a post-pressure compensator |
US7194856B2 (en) * | 2005-05-31 | 2007-03-27 | Caterpillar Inc | Hydraulic system having IMV ride control configuration |
US7210396B2 (en) * | 2005-08-31 | 2007-05-01 | Caterpillar Inc | Valve having a hysteretic filtered actuation command |
US7331175B2 (en) * | 2005-08-31 | 2008-02-19 | Caterpillar Inc. | Hydraulic system having area controlled bypass |
US7614336B2 (en) * | 2005-09-30 | 2009-11-10 | Caterpillar Inc. | Hydraulic system having augmented pressure compensation |
US20100043418A1 (en) * | 2005-09-30 | 2010-02-25 | Caterpillar Inc. | Hydraulic system and method for control |
US7320216B2 (en) * | 2005-10-31 | 2008-01-22 | Caterpillar Inc. | Hydraulic system having pressure compensated bypass |
JP4353190B2 (ja) * | 2006-02-27 | 2009-10-28 | コベルコ建機株式会社 | 建設機械の油圧回路 |
US7380398B2 (en) * | 2006-04-04 | 2008-06-03 | Husco International, Inc. | Hydraulic metering mode transitioning technique for a velocity based control system |
US7621211B2 (en) * | 2007-05-31 | 2009-11-24 | Caterpillar Inc. | Force feedback poppet valve having an integrated pressure compensator |
US20080295681A1 (en) * | 2007-05-31 | 2008-12-04 | Caterpillar Inc. | Hydraulic system having an external pressure compensator |
US8479504B2 (en) * | 2007-05-31 | 2013-07-09 | Caterpillar Inc. | Hydraulic system having an external pressure compensator |
DE112007003562T5 (de) * | 2007-07-02 | 2010-05-12 | Parker Hannifin Ab | Fluidventilanordnung |
US8348642B2 (en) | 2007-10-31 | 2013-01-08 | Schlumberger Technology Corporation | Active mud valve system |
DE102008013602B4 (de) | 2008-03-11 | 2019-07-04 | Robert Bosch Gmbh | Verfahren zum Ansteuern einer Vielzahl von Ventilen und Steuerblock mit einer Vielzahl von Ventilen |
US8631650B2 (en) * | 2009-09-25 | 2014-01-21 | Caterpillar Inc. | Hydraulic system and method for control |
CA2797322C (en) * | 2011-12-01 | 2019-11-12 | Harnischfeger Technologies, Inc. | Leveling system |
US9309969B2 (en) | 2013-02-22 | 2016-04-12 | Cnh Industrial America Llc | System and method for controlling a hydrostatic drive unit of a work vehicle |
EP2881595B1 (en) * | 2013-12-03 | 2018-08-22 | Ansaldo Energia IP UK Limited | Device for emergency operation of actuators |
US10563676B1 (en) | 2014-06-23 | 2020-02-18 | Vecna Robotics, Inc. | Hydrosymbiosis |
US10072681B1 (en) | 2014-06-23 | 2018-09-11 | Vecna Technologies, Inc. | Controlling a fluid actuated device |
BE1025480B9 (nl) * | 2017-08-18 | 2019-04-08 | Punch Powertrain Nv | Elektrisch aanstuurbaar hydraulisch systeem voor een voertuigoverbrenging en een werkwijze voor het aansturen daarvan |
US20230312241A1 (en) * | 2022-03-31 | 2023-10-05 | Oshkosh Corporation | Cycle time control for a refuse vehicle hydraulic system |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1666748A (en) | 1927-03-26 | 1928-04-17 | Motor-controlling apparatus | |
USRE26028E (en) | 1963-05-16 | 1966-05-17 | Pilot operated control valve mechanism | |
US3714868A (en) | 1970-09-23 | 1973-02-06 | Marotta Scientific Controls | Valve system for proportional flow control for fluid-operated motor |
US3726191A (en) * | 1971-02-08 | 1973-04-10 | Bunker Ramo | Electrically controlled hydraulic system and transducer therefor |
CH563532A5 (da) | 1973-03-14 | 1975-06-30 | Buehler Ag Geb | |
JPS6037321B2 (ja) * | 1974-11-30 | 1985-08-26 | 株式会社豊田中央研究所 | 流体アクチユエ−タの制御装置 |
JPS5229581A (en) * | 1975-09-01 | 1977-03-05 | Nippon Spindle Mfg Co Ltd | Oil pressure control device |
DE2645768C2 (de) | 1976-10-09 | 1983-04-07 | Danfoss A/S, 6430 Nordborg | Elektrohydraulische Steuervorrichtung |
US4282711A (en) * | 1979-07-26 | 1981-08-11 | Deere & Company | Hydrostatic transmission control system |
JPS5437378A (en) * | 1977-08-30 | 1979-03-19 | Ishikawajima Harima Heavy Ind Co Ltd | Removal of hydrogen chloride gas produced in fluidized bed type incinerator |
JPS5490721U (da) * | 1977-12-12 | 1979-06-27 | ||
US4250794A (en) | 1978-03-31 | 1981-02-17 | Caterpillar Tractor Co. | High pressure hydraulic system |
JPS58876Y2 (ja) * | 1978-07-20 | 1983-01-08 | 三菱重工業株式会社 | 原子炉冷却材用加圧装置 |
JPS55119709A (en) * | 1979-03-09 | 1980-09-13 | Hitachi Constr Mach Co Ltd | Servo mechanism |
US4450753A (en) * | 1980-05-12 | 1984-05-29 | Ford Motor Company | Electro-hydraulic proportional actuator |
FR2484106A1 (fr) * | 1980-06-10 | 1981-12-11 | Guettmann Pierre | Convertisseur courant-debit a reponse rapide, notamment pour l'asservissement de dispositifs de manoeuvre de charges, ou autres, ou de dispositifs de distribution |
-
1982
- 1982-04-01 US US06/364,373 patent/US4437385A/en not_active Ceased
-
1983
- 1983-03-11 CA CA000423408A patent/CA1202100A/en not_active Expired
- 1983-03-18 MX MX196646A patent/MX155212A/es unknown
- 1983-03-24 EP EP83102914A patent/EP0091018B1/de not_active Expired
- 1983-03-24 AT AT83102914T patent/ATE20690T1/de not_active IP Right Cessation
- 1983-03-24 DE DE8383102914T patent/DE3364410D1/de not_active Expired
- 1983-03-25 ES ES520993A patent/ES520993A0/es active Granted
- 1983-03-25 DK DK137783A patent/DK137783A/da not_active Application Discontinuation
- 1983-03-29 AU AU12923/83A patent/AU550989B2/en not_active Ceased
- 1983-03-29 JP JP58053443A patent/JPH0610481B2/ja not_active Expired - Lifetime
- 1983-03-30 BR BR8301657A patent/BR8301657A/pt unknown
- 1983-03-30 ZA ZA832274A patent/ZA832274B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
MX155212A (es) | 1988-01-29 |
JPS58180803A (ja) | 1983-10-22 |
JPH0610481B2 (ja) | 1994-02-09 |
AU550989B2 (en) | 1986-04-10 |
DE3364410D1 (en) | 1986-08-14 |
EP0091018A1 (de) | 1983-10-12 |
ATE20690T1 (de) | 1986-07-15 |
BR8301657A (pt) | 1983-12-13 |
ES8404021A1 (es) | 1984-04-01 |
CA1202100A (en) | 1986-03-18 |
ZA832274B (en) | 1984-11-28 |
EP0091018B1 (de) | 1986-07-09 |
DK137783D0 (da) | 1983-03-25 |
ES520993A0 (es) | 1984-04-01 |
AU1292383A (en) | 1983-10-06 |
US4437385A (en) | 1984-03-20 |
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