EP0519791A1 - Apparatus for controlling the position of a steering gear, in particular of a ship - Google Patents
Apparatus for controlling the position of a steering gear, in particular of a ship Download PDFInfo
- Publication number
- EP0519791A1 EP0519791A1 EP92401639A EP92401639A EP0519791A1 EP 0519791 A1 EP0519791 A1 EP 0519791A1 EP 92401639 A EP92401639 A EP 92401639A EP 92401639 A EP92401639 A EP 92401639A EP 0519791 A1 EP0519791 A1 EP 0519791A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinders
- balancing
- actuating
- controlling
- control
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
Images
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
- F15B18/00—Parallel arrangements of independent servomotor systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/08—Steering gear
- B63H25/14—Steering gear power assisted; power driven, i.e. using steering engine
- B63H25/26—Steering engines
- B63H25/28—Steering engines of fluid type
- B63H25/30—Steering engines of fluid type hydraulic
Definitions
- the present invention relates to a device for controlling the position of a steering gear, in particular of a ship.
- control devices which comprise two double-acting actuating cylinders, connected to the ends of a rod or wick cross member of the apparatus and connected to means for supplying fluid under pressure, the operation of which is controlled by means for controlling the position of the device at a set position.
- the means for supplying fluid to the actuating cylinders comprise one or more fluid pumps and it is necessary to increase the switching of fluid in the supply circuits of the actuators for reasons of rapid reconfiguration of the together for example after a breakdown.
- this increases the complexity of the circuits and the risk of leaks.
- this type of steering gear is increasingly brought to participate in the stabilization and damping of the movements, for example of the ship which is subjected to wave movements, for example of the sea.
- documents FR-A-2 058 953 and US-A-3 741 073 are known, devices for controlling the position of any device such as an aircraft control surface, comprising actuating jacks connected to means for supplying pressurized fluid, the operation of which is controlled by means of slaving to a set position.
- the object of the invention is therefore to solve these problems by proposing a device for controlling the position of a steering gear which is simple, reliable and which makes it possible to ensure optimal stabilization of the position of this gear.
- the subject of the invention is a device for controlling the position of a ship's steering gear, of the type comprising two double-acting actuating cylinders, connected to the ends of a wick bar of the device and connected to means for supplying pressurized fluid, the operation of which is controlled by means for controlling the position of the device to a set position, characterized in that the means for supplying the actuators pressurized fluid operation comprise a supply group associated with each actuating cylinder and in that it comprises means for balancing the supply fluid pressures of the cylinders, at the outlet of these groups, to balance the control of the actuating cylinders and stabilize the device in position.
- the balancing means comprise two cylinders with double balancing effect, in opposition, whose rods are integral in translation and each of which is connected in parallel on one of the actuating cylinders and a sensor position balancing cylinder rods, the output of which is connected to means for regulating the operation of at least one of the supply groups, in order to balance the control of the operating cylinders and therefore stabilize the position of the device to govern.
- a device according to the invention for controlling the position of a steering gear for example of a ship, comprises two actuating cylinders 1 and 2 double effect whose piston rods are connected to the ends of a bar or wick cross member of the device, designated by the general reference 3 in these figures.
- This steering device has a conventional structure with a bar or wick crosspiece to orient the rudder (not shown) in a desired position.
- the actuating cylinders 1 and 2 are connected to means for supplying pressurized fluid designated under the general reference 4 in FIG. 1, the operation of which is controlled by means 5 for controlling the position of the apparatus at a setpoint position.
- These control means have a structure of known type and include, for example, a conventional PID type regulator.
- the means 4 for supplying the cylinders with pressurized fluid comprise a supply group associated with each actuating cylinder 1 and 2, these groups being designated by the references 6 and 7, respectively.
- These groups have known structures and include, for example, hydraulic pumps whose operation is controlled by the output of the servo means 5.
- control device also comprises means 8 for balancing the pressures of the fluid supplying the actuating cylinders at the outlet of these groups in order to balance the control of the actuating cylinders and stabilize the device in position. .
- these balancing means 8 advantageously comprise two jacks with double balancing effect, designated by the general references 9 and 10, mounted in opposition and whose piston rods are integral in translation.
- Each of these balancing cylinders 9 and 10 is connected in parallel to one of the operating cylinders 1 and 2 respectively, so as to be supplied with pressurized fluid at the same time as these.
- the device according to the invention also comprises a linear sensor 11 for the position of the rods of the balancing jacks, the output of which is connected to means 12 for regulating the operation of at least one of the supply groups.
- cylinder and in the particular case, group 6, to balance the control of the actuating cylinders and stabilize the position of the steering gear by acting on the output pressure of this group.
- cylinders 1 and 2 are supplied by groups 6 and 7 depending on the value position setpoint entered in the regulator and the actual position of the drill crosspiece. Note that these positions are entered and measured respectively by any means known per se.
- the supply of the cylinders 1 and 2 being made by means of separate and separate pumps, it is necessary to provide means for balancing the pressures and output flows of these groups to obtain good stabilization in position of the device. to govern.
- balancing means comprising balancing jacks 9 and 10 connected in parallel on jacks 1 and 2.
- the displacement of these pistons causes a displacement of the rods thereof and the displacement of these rods is measured by the position sensor 11.
- the output thereof is used to regulate the operation of one of the supply groups through regulator 12.
- the device according to the invention makes it possible to compensate for any imbalance in addition to the pressures of supply fluid to the actuating cylinders of the bar or wick cross member in order to obtain optimal stabilization of the steering gear.
- the drive member 14 is movably mounted on a guide rod 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
Description
La présente invention concerne un dispositif de commande de la position d'un appareil à gouverner notamment d'un navire.The present invention relates to a device for controlling the position of a steering gear, in particular of a ship.
Plus particulièrement, l'invention se rapporte à de tels dispositifs de commande qui comportent deux vérins de manoeuvre à double effet, reliés aux extrémités d'une barre ou traverse de mèche de l'appareil et raccordés à des moyens d'alimentation en fluide sous pression dont le fonctionnement est piloté par des moyens d'asservissement de la position de l'appareil à une position de consigne.More particularly, the invention relates to such control devices which comprise two double-acting actuating cylinders, connected to the ends of a rod or wick cross member of the apparatus and connected to means for supplying fluid under pressure, the operation of which is controlled by means for controlling the position of the device at a set position.
Ces dispositifs de l'état de la technique présentent un certain nombre d'inconvénients au niveau d'une part de leur structure et d'autre part des nouvelles fonctions que l'appareil à gouverner doit remplir.These devices of the state of the art have a certain number of drawbacks on the one hand in their structure and on the other hand in the new functions which the steering gear must fulfill.
En effet, les moyens d'alimentation en fluide des vérins de manoeuvre comprennent une ou plusieurs pompes de fluide et l'on est obligé de multiplier les commutations de fluide dans les circuits d'alimentation des vérins pour des raisons de rapidité de reconfiguration de l'ensemble par exemple après une panne. Or, ceci augmente la complexité des circuits et les risques de fuite.In fact, the means for supplying fluid to the actuating cylinders comprise one or more fluid pumps and it is necessary to increase the switching of fluid in the supply circuits of the actuators for reasons of rapid reconfiguration of the together for example after a breakdown. However, this increases the complexity of the circuits and the risk of leaks.
Par ailleurs, ce type d'appareils à gouverner est amené de plus en plus à participer à la stabilisation et à l'amortissement des mouvements par exemple du navire qui est soumis à des mouvements ondulatoires, par exemple de la mer.In addition, this type of steering gear is increasingly brought to participate in the stabilization and damping of the movements, for example of the ship which is subjected to wave movements, for example of the sea.
En conséquence, ces appareils fonctionnent constamment en dynamique à des vitesses angulaires élevées et aucun moyen particulier n'a été prévu sur les appareils à gouverner de l'état de la technique pour permettre un fonctionnement optimal de ces appareils, dans de telles conditions.Consequently, these devices operate constantly in dynamics at high angular speeds and no particular means has been provided on the steering gear of the state of the art to allow optimal operation of these devices, under such conditions.
On connaît par exemple des documents FR-A-2 058 953 et US-A-3 741 073, des dispositifs de commande de la position d'un appareil quelconque tel qu'une gouverne d'avion, comportant des vérins de manoeuvre raccordés à des moyens d'alimentation en fluide sous pression dont le fonctionnement est piloté par des moyens d'asservissement à une position de consigne.For example, documents FR-A-2 058 953 and US-A-3 741 073 are known, devices for controlling the position of any device such as an aircraft control surface, comprising actuating jacks connected to means for supplying pressurized fluid, the operation of which is controlled by means of slaving to a set position.
Cependant, les structures de ces dispositifs sont relativement complexes et ils présentent des temps de réponse très longs.However, the structures of these devices are relatively complex and they have very long response times.
Le but de l'invention est donc de résoudre ces problèmes en proposant un dispositif de commande de la position d'un appareil à gouverner qui soit simple, fiable et qui permette d'assurer une stabilisation optimale de la position de cet appareil.The object of the invention is therefore to solve these problems by proposing a device for controlling the position of a steering gear which is simple, reliable and which makes it possible to ensure optimal stabilization of the position of this gear.
A cet effet, l'invention a pour objet un dispositif de commande de la position d'un appareil à gouverner d'un navire, du type comportant deux vérins de manoeuvre à double effet, reliés aux extrémités d'une barre de mèche de l'appareil et raccordés à des moyens d'alimentation en fluide sous pression dont le fonctionnement est piloté par des moyens d'asservissement de la position de l'appareil à une position de consigne, caractérisé en ce que les moyens d'alimentation des vérins de manoeuvre en fluide sous pression comprennent un groupe d'alimentation associé à chaque vérin de manoeuvre et en ce qu'il comporte des moyens d'équilibrage des pressions de fluide d'alimentation des vérins, en sortie de ces groupes, pour équilibrer la commande des vérins de manoeuvre et stabiliser l'appareil en position.To this end, the subject of the invention is a device for controlling the position of a ship's steering gear, of the type comprising two double-acting actuating cylinders, connected to the ends of a wick bar of the device and connected to means for supplying pressurized fluid, the operation of which is controlled by means for controlling the position of the device to a set position, characterized in that the means for supplying the actuators pressurized fluid operation comprise a supply group associated with each actuating cylinder and in that it comprises means for balancing the supply fluid pressures of the cylinders, at the outlet of these groups, to balance the control of the actuating cylinders and stabilize the device in position.
Selon un mode de réalisation, les moyens d'équilibrage comprennent deux vérins à double effet d'équilibrage, en opposition, dont les tiges sont solidaires en translation et dont chacun est connecté en parallèle sur l'un des vérins de manoeuvre et un capteur de position des tiges des vérins d'équilibrage, dont la sortie est reliée à des moyens de régulation du fonctionnement d'au moins l'un des groupes d'alimentation, pour équilibrer la commande des vérins de manoeuvre et donc stabiliser la position de l'appareil à gouverner.According to one embodiment, the balancing means comprise two cylinders with double balancing effect, in opposition, whose rods are integral in translation and each of which is connected in parallel on one of the actuating cylinders and a sensor position balancing cylinder rods, the output of which is connected to means for regulating the operation of at least one of the supply groups, in order to balance the control of the operating cylinders and therefore stabilize the position of the device to govern.
L'invention sera mieux comprise à l'aide de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés sur lesquels :
- la figure 1 représente un schéma synoptique d'un dispositif de commande selon l'invention ;
- la figure 2 représente un schéma illustrant le fonctionnement d'un dispositif de commande selon l'invention ; et
- la figure 3 représente une vue partiellement en coupe de la partie mécanique d'un dispositif de commande selon l'invention.
- FIG. 1 represents a block diagram of a control device according to the invention;
- FIG. 2 represents a diagram illustrating the operation of a control device according to the invention; and
- Figure 3 shows a partially sectional view of the mechanical part of a control device according to the invention.
Ainsi qu'on peut le voir sur les figures 1 et 2, un dispositif selon l'invention pour la commande de la position d'un appareil à gouverner, par exemple d'un navire, comporte deux vérins de manoeuvre 1 et 2 à double effet dont les tiges de piston sont reliées aux extrémités d'une barre ou traverse de mèche de l'appareil, désignée par la référence générale 3 sur ces figures. Cet appareil à gouverner présente une structure classique avec une barre ou traverse de mèche permettant d'orienter le gouvernail (non représenté) dans une position souhaitée.As can be seen in Figures 1 and 2, a device according to the invention for controlling the position of a steering gear, for example of a ship, comprises two actuating cylinders 1 and 2 double effect whose piston rods are connected to the ends of a bar or wick cross member of the device, designated by the
Les vérins de manoeuvre 1 et 2 sont raccordés à des moyens d'alimentation en fluide sous pression désignés sous la référence générale 4 sur la figure 1, dont le fonctionnement est piloté par des moyens 5 d'asservissement de la position de l'appareil à une position de consigne. Ces moyens d'asservissement présentent une structure de type connu et comprennent, par exemple, un régulateur classique de type PID.The actuating cylinders 1 and 2 are connected to means for supplying pressurized fluid designated under the general reference 4 in FIG. 1, the operation of which is controlled by
Selon l'invention, les moyens d'alimentation 4 des vérins en fluide sous pression comprennent un groupe d'alimentation associé à chaque vérin de manoeuvre 1 et 2, ces groupes étant désignés par les références 6 et 7, respectivement. Ces groupes présentent des structures connues et comprennent, par exemple, des pompes hydrauliques dont le fonctionnement est contrôlé par la sortie des moyens d'asservissement 5.According to the invention, the means 4 for supplying the cylinders with pressurized fluid comprise a supply group associated with each actuating cylinder 1 and 2, these groups being designated by the
Par ailleurs, le dispositif de commande selon l'invention comporte également des moyens 8 d'équilibrage des pressions de fluide d'alimentation des vérins de manoeuvre en sortie de ces groupes pour équilibrer la commande des vérins de manoeuvre et stabiliser l'appareil en position.Furthermore, the control device according to the invention also comprises
Comme on peut le voir plus particulièrement sur la figure 2, ces moyens d'équilibrage 8 comprennent avantageusement deux vérins à double effet d'équilibrage, désignés par les références générales 9 et 10, montés en opposition et dont les tiges de piston sont solidaires en translation. Chacun de ces vérins d'équilibrage 9 et 10 est connecté en parallèle sur l'un des vérins de manoeuvre 1 et 2 respectivement, de manière à être alimenté en fluide sous pression en même temps que ceux-ci.As can be seen more particularly in FIG. 2, these balancing means 8 advantageously comprise two jacks with double balancing effect, designated by the
Par ailleurs, le dispositif selon l'invention comporte également un capteur linéaire 11 de position des tiges des vérins d'équilibrage, dont la sortie est reliée à des moyens de régulation 12 du fonctionnement d'au moins l'un des groupes d'alimentation de vérin, et dans le cas particulier, le groupe 6, pour équilibrer la commande des vérins de manoeuvre et stabiliser la position de l'appareil à gouverner en agissant sur la pression de sortie de ce groupe.Furthermore, the device according to the invention also comprises a
On conçoit en effet que les vérins 1 et 2 sont alimentés par les groupes 6 et 7 en fonction de la valeur de consigne de position entrée dans le régulateur et de la position réelle de la traverse de mèche. On notera que ces positions sont entrées et mesurées respectivement par tout moyen connu en soi.We can see that cylinders 1 and 2 are supplied by
L'alimentation des vérins 1 et 2 se faisant à l'aide de pompes distinctes et séparées, il est nécessaire de prévoir des moyens d'équilibrage des pressions et débits de sortie de ces groupes pour obtenir une bonne stabilisation en position de l'appareil à gouverner. Ceci est réalisé par l'intermédiaire des moyens d'équilibrage comprenant les vérins d'équilibrage 9 et 10 connectés en parallèle sur les vérins 1 et 2. En cas de déséquilibre entre les pressions P1 et P2 de sortie respectivement des groupes 6 et 7, il se produit un déséquilibre entre les forces exercées sur les pistons des vérins d'équilibrage 9 et 10 de sorte que ceux-ci se déplacent pour compenser automatiquement ce déséquilibre. Le déplacement de ces pistons entraîne un déplacement des tiges de ceux-ci et le déplacement de ces tiges est mesuré par le capteur de position 11. La sortie de celui-ci est utilisée pour réguler le fonctionnement de l'un des groupes d'alimentation à travers le régulateur 12.The supply of the cylinders 1 and 2 being made by means of separate and separate pumps, it is necessary to provide means for balancing the pressures and output flows of these groups to obtain good stabilization in position of the device. to govern. This is achieved by means of balancing means comprising balancing
On conçoit donc que le dispositif selon l'invention permet de compenser tout déséquilibre outre les pressions de fluide d'alimentation des vérins de manoeuvre de la barre ou traverse de mèche pour obtenir une stabilisation optimale de l'appareil à gouverner.It is therefore understandable that the device according to the invention makes it possible to compensate for any imbalance in addition to the pressures of supply fluid to the actuating cylinders of the bar or wick cross member in order to obtain optimal stabilization of the steering gear.
Par ailleurs, ceci permet d'obtenir un temps de réponse très faible et indépendant du temps de réponse de la boucle d'asservissement en position de l'ensemble.Furthermore, this makes it possible to obtain a very low response time independent of the response time of the control loop in the position of the assembly.
De plus, une telle structure permet d'utiliser de manière optimale l'appareil à gouverner, dans des fonctions de stabilisation du navire.In addition, such a structure makes it possible to optimally use the steering gear, in stabilization functions of the ship.
Sur la figure 3, on a représenté un mode de réalisation de la partie mécanique d'un dispositif selon l'invention.In Figure 3, there is shown an embodiment of the mechanical part of a device according to the invention.
On reconnaît sur cette figure les vérins d'équilibrage 9 et 10 dont les tiges de sortie 9a et 10a sont reliées par une structure de liaison 13 comportant, dans sa partie supérieure, un organe d'entraînement 14 de la partie mobile 15 du capteur de position 11 des tiges de vérin.We recognize in this figure the
L'organe d'entraînement 14 est monté déplaçable sur une tige de guidage 16.The
Bien entendu, d'autres modes de réalisation de cette partie mécanique peuvent être envisagés.Of course, other embodiments of this mechanical part can be envisaged.
Par ailleurs, bien que dans le mode de réalisation on ait représenté un régulateur 12 permettant de contrôler le fonctionnement du groupe 6 d'alimentation du vérin 1, il va de soi bien que ce régulateur peut être intégré dans la ligne de commande du groupe 7 d'alimentation du vérin 2.Furthermore, although in the embodiment there is shown a
Enfin, d'autres moyens d'équilibrage tels que des comparateurs des pressions de sortie des groupes 6 et 7 peuvent être utilisés, la sortie de ces comparateurs étant utilisée pour piloter le régulateur 12.Finally, other balancing means such as comparators of the outlet pressures of
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9107538 | 1991-06-19 | ||
FR9107538A FR2677948B1 (en) | 1991-06-19 | 1991-06-19 | DEVICE FOR CONTROLLING THE POSITION OF AN APPARATUS FOR GOVERNING IN PARTICULAR OF A VESSEL. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0519791A1 true EP0519791A1 (en) | 1992-12-23 |
EP0519791B1 EP0519791B1 (en) | 1995-09-20 |
Family
ID=9414044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920401639 Expired - Lifetime EP0519791B1 (en) | 1991-06-19 | 1992-06-12 | Apparatus for controlling the position of a steering gear, in particular of a ship |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0519791B1 (en) |
DE (1) | DE69204919T2 (en) |
FR (1) | FR2677948B1 (en) |
TW (1) | TW199880B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116461687A (en) * | 2022-12-27 | 2023-07-21 | 江苏华阳重工股份有限公司 | Intelligent rudder with self-correcting function |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123947A1 (en) * | 2001-05-17 | 2002-12-05 | Zf Luftfahrttechnik Gmbh | Actuator arrangement actuatable by pressure medium |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2058953A5 (en) * | 1969-08-12 | 1971-05-28 | Dornier Gmbh | |
US3741073A (en) * | 1971-01-29 | 1973-06-26 | Moog Inc | Hysteretic equalization in redundant electrically operated fluid powered servopositioning apparatus |
-
1991
- 1991-06-19 FR FR9107538A patent/FR2677948B1/en not_active Expired - Fee Related
-
1992
- 1992-06-12 EP EP19920401639 patent/EP0519791B1/en not_active Expired - Lifetime
- 1992-06-12 DE DE1992604919 patent/DE69204919T2/en not_active Expired - Fee Related
- 1992-06-22 TW TW81104886A patent/TW199880B/zh active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2058953A5 (en) * | 1969-08-12 | 1971-05-28 | Dornier Gmbh | |
US3741073A (en) * | 1971-01-29 | 1973-06-26 | Moog Inc | Hysteretic equalization in redundant electrically operated fluid powered servopositioning apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116461687A (en) * | 2022-12-27 | 2023-07-21 | 江苏华阳重工股份有限公司 | Intelligent rudder with self-correcting function |
Also Published As
Publication number | Publication date |
---|---|
DE69204919D1 (en) | 1995-10-26 |
FR2677948A1 (en) | 1992-12-24 |
DE69204919T2 (en) | 1996-04-04 |
FR2677948B1 (en) | 1997-05-30 |
TW199880B (en) | 1993-02-11 |
EP0519791B1 (en) | 1995-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2511736A1 (en) | ELECTROHYDRAULIC ADJUSTMENT DEVICE FOR A HYDROSTATIC MACHINE | |
FR2527275A1 (en) | ELECTRO-HYDRAULIC CONTROL DEVICE FOR A DRIVE ENGINE ASSEMBLY | |
FR2511328A1 (en) | HYDROSTATIC ASSISTED STEERING | |
EP2980417B1 (en) | Dual mobile assembly servovalve | |
FR2548291A1 (en) | HYDRAULIC INSTALLATION COMPRISING TWO EQUIPMENT USING HYDRAULIC ENERGY | |
FR2689853A1 (en) | Linear variable differential transformer for a device for varying the pitch of a helix. | |
FR2518030A1 (en) | CONTROL DEVICE FOR TWO HYDRAULIC ADJUSTERS | |
EP3242041B1 (en) | Servo valve with asymmetric redundant piezoelectric actuator | |
EP0519791B1 (en) | Apparatus for controlling the position of a steering gear, in particular of a ship | |
FR2551144A1 (en) | Speed-reducing compensation control device for a pump with variable cylinder capacity connected to an engine | |
EP3313730B1 (en) | Regulating device for a turboprop propeller with variable pitch blades | |
EP0938623B1 (en) | Drilling device | |
FR2575517A1 (en) | VALVE DEVICE FOR HYDRAULIC SUPPORT SYSTEMS AND THE LIKE | |
FR2472465A1 (en) | IMPROVEMENTS IN HYDRAULIC PRESSES, IN PARTICULAR THEIR APPROACH SPEED CONTROL SYSTEMS | |
FR2694605A1 (en) | Control assembly for a plurality of hydraulic receivers. | |
FR2479352A1 (en) | FLUID SERVO APPARATUS | |
US4177644A (en) | Apparatus for controlling and taking up axial displacement in machinings on large diameter cylinders | |
EP0664500B1 (en) | Pressure regulating servo-valve | |
FR2765276A1 (en) | Control of distributed hydraulic actuators e.g. for jack or hydraulic motors | |
FR2541391A1 (en) | PROPORTIONAL HYDRAULIC DISTRIBUTION DEVICE AND APPLICATION TO A HYDRAULIC DISPENSER, PRESSURE LIMITER, FLOW REGULATOR AND HYDRAULIC MACHINE | |
EP0396433B1 (en) | Flow control device and power steering circuit including this device | |
EP0306368A1 (en) | Pressure compensator valve for a hydraulic proportional directional valve, and hydraulic directional valve comprising it | |
FR2752446A1 (en) | OPTIMIZED CONTROL METHOD FOR AN ELECTROFLUIDIC ACTUATOR AND ACTUATOR USING THE SAME | |
FR2524075A1 (en) | DEVICE FOR CONTROLLING A DRIVE ASSEMBLY WITH MULTI-PISTON ENGINE | |
FR2738040A1 (en) | Pneumatic actuator with speed control of piston |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES GB IT |
|
17P | Request for examination filed |
Effective date: 19930426 |
|
17Q | First examination report despatched |
Effective date: 19940531 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES GB IT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19950920 |
|
ITF | It: translation for a ep patent filed | ||
REF | Corresponds to: |
Ref document number: 69204919 Country of ref document: DE Date of ref document: 19951026 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19960104 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20040604 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20040609 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050612 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050612 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060103 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20050612 |