EP1467118A2 - Device for replenishing the chambers of a hydraulic actuating cylinder - Google Patents

Device for replenishing the chambers of a hydraulic actuating cylinder Download PDF

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Publication number
EP1467118A2
EP1467118A2 EP20040290911 EP04290911A EP1467118A2 EP 1467118 A2 EP1467118 A2 EP 1467118A2 EP 20040290911 EP20040290911 EP 20040290911 EP 04290911 A EP04290911 A EP 04290911A EP 1467118 A2 EP1467118 A2 EP 1467118A2
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EP
European Patent Office
Prior art keywords
valves
spring
valve
valve seat
chambers
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Granted
Application number
EP20040290911
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German (de)
French (fr)
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EP1467118B1 (en
EP1467118A3 (en
Inventor
Alain Roy
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Goodrich Actuation Systems SAS
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Goodrich Actuation Systems SAS
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Publication of EP1467118A2 publication Critical patent/EP1467118A2/en
Publication of EP1467118A3 publication Critical patent/EP1467118A3/en
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Publication of EP1467118B1 publication Critical patent/EP1467118B1/en
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    • 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
    • F15B21/047—Preventing foaming, churning or cavitation
    • 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
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/265—Plural outflows
    • Y10T137/2663—Pressure responsive

Definitions

  • the invention relates to a device for regulating the pressure. in the chambers of a hydraulic cylinder, especially when the cylinder hydraulic is used as a shock absorber.
  • the invention relates more particularly to a device for hydraulic fluid replenishment of the chambers of a hydraulic cylinder used as a shock absorber.
  • the cylinder is used by example as a steering actuator of an aircraft and is able to be used to ensure depreciation whether in normal operation or in emergency mode.
  • FIG. 1 schematically illustrates a conventional device for pressure regulation in the chambers of a hydraulic cylinder 1 used as a shock absorber.
  • Said hydraulic cylinder 1 comprises a chamber 14 filled with hydraulic fluid in which a piston 13 and a control rod 11 integral with said piston 13.
  • the position of the piston 13 in the chamber 14 defines on either side of the said piston 13 two chambers, Chamber1 and Chamber2, respectively to the left and to the right of said piston 13.
  • the hydraulic cylinder 1 receives by its control rod 11 a reciprocating movement represented by arrow 12, said hydraulic cylinder 1 having the function of damping said reciprocating movement.
  • the fluid hydraulics pass from one chamber to the other through a restrictor 3.
  • each of the chambers Room1, Room2 is conventionally connected to a device 2 allowing to replenish said cylinder 1 with hydraulic fluid.
  • a hydraulic accumulator 4 pressurizes the hydraulic fluid above of atmospheric pressure.
  • the pressurized fluid circulates from said physical accumulator 4 to the device 2.
  • Said device 2 has thus for the function of supplying pressurized hydraulic fluid, when this is necessary, room Room1 or Room2 in depression.
  • said device 2 is of the "non-return" type, the fluid can only circulate from said device 2 to said chambers Bedroom 1, Bedroom 2 of said cylinder 1.
  • the device 2 for re-supplying fluid to the chambers of a jack hydraulic like the one schematically illustrated in Figure 1, includes conventionally two check valves. Said two non-return valves are arranged separately or placed head to tail in the same bore. And each check valve thus has its own spring and its own valve guide.
  • such a device for re-supplying fluid to rooms of a hydraulic cylinder is bulky and the number of parts necessary for its realization is important.
  • the size and complexity of such a device are in particular such as in particular the volume, mass and cost of producing such a device are high.
  • An object of the invention is to overcome these aforementioned drawbacks.
  • the invention proposes a device for regulating the pressure in the chambers of a hydraulic cylinder comprising a seat hollow valve extending substantially longitudinally between two portions end, the body of the valve seat being connected to a source of pressurized fluid, each of the end portions of the valve seat being connected to a chamber of the hydraulic cylinder and adapted to accommodate a valve to control the hydraulic fluid replenishment of said cylinder chamber, characterized in that a valve return spring is arranged in said valve seat and in that each of the ends of said valve return spring is hooked to one of said valves.
  • the device which is the subject of the invention requires only one spring.
  • the mobile equipment consisting of the spring and the valves has no need to be guided. Due to the restoring force exerted by said spring, the valves effectively return automatically, after their lifted, on the end portions of the valve seat.
  • the device object of the invention therefore does not make use of valve guides. The size of the device object of the invention is thus limited and its implementation is simplified.
  • the object of the invention also prevents the circulation of hydraulic fluid from said cylinder chambers to said seat valve, said valves thus also acting as non-return valves.
  • each of the valves from its equilibrium position in contact with the corresponding end portion of the valve seat is produced as soon as a sufficient pressure difference exists between the chamber of the hydraulic cylinder to which said portion end of said valve seat is connected and the interior of said valve seat, thereby authorizing the replenishment of pressurized hydraulic fluid from said cylinder chamber.
  • each of the ends of the spring of valve reminder is attached to one of the valves substantially in its center suitably so that the mobile equipment consisting of the spring and valves need not be guided, said valves returning in particular automatically on their equilibrium position after being removed from it, including understood if the said valves have not moved perfectly in the axis of the seat valve.
  • valves used in the context of the invention are spherical or conical in scope.
  • a through hole each of the valves and each of the end portions of the spring forms a end wire capable of coming into said holes.
  • Said sons end protrude from the holes and are welded at their outlet to said valves to allow the attachment of each end of said spring to a of said valves.
  • an adjustment of the spring tension is once a first end portion of the spring is welded to a first valve, by stretching the other end portion of the spring through the hole diametrically crossing the second valve until the setting under desired tension. The other end portion of said spring is then welded audit second valve.
  • the valves have a stud pierced with a hole and each of the end portions of the valve return spring forms an end loop. Said loops end are received in said nipple holes to allow the attachment of each end of said valve return spring to one of said valves.
  • said valves cannot be simultaneously spaced from said end portions of said valve seat, this which prevents the simultaneous supply of the chambers of said cylinder.
  • the device 2 object of the invention for the fluid supply of the chambers of a jack hydraulic comprises a valve seat 5 which receives the fluid supply of the hydraulic accumulator to which it is connected via conduit 18.
  • Said valve seat 5 is substantially cylindrical and is filled with hydraulic fluid previously pressurized by the hydraulic accumulator.
  • Said valve seat 5 has at each of its ends a seat of valve capable of accommodating a valve 7a, 7b and will therefore be called subsequently double-seat valve.
  • valves 7a, 7b preferably have a spherical bearing or conical so as to come into effective contact with each of the portions end of the double-seat valve 5 for sealing the device subject of the invention.
  • Each end of the double valve seat 5 is connected to one of rooms Room1, Room2 of the hydraulic cylinder used as shock absorber allowing, when necessary, the re-supply of hydraulic fluid from one of the chambers Chamber1, Chamber2 of the cylinder hydraulic.
  • a tension spring 6 is arranged in the center of said double seat 5 of valve and the valves 7a, 7b are hooked respectively to each of the ends of said tension spring 6.
  • valves 7a, 7b are drawn in their center by each of the ends of said tension spring 6.
  • said two valves 7a, 7b connected together by said tension spring 6 are, in their equilibrium position, housed in their seats respective on either side of said double seat 5 of valve filled with fluid pressurized.
  • the restoring force exerted by the spring 6 on each of the valves 7a, 7b substantially in their center allows to maintain said valves 7a, 7b in contact with said double-seat valve 5 and prevent the flow of said fluid towards one of the chambers.
  • the tension spring 6 advantageously constitutes a spring of valve reminder. After being removed from their equilibrium position, said valves 7a, 7b effectively return automatically, due to the force of return exerted by said spring 6, in equilibrium position, to be housed in their respective seats, including if the said valves have not moved aside perfectly in line with said double valve seat 5. Mobile equipment consisting of the spring 6 and said valves 7a, 7b has thus, by construction, no need to be guided.
  • valves 7a, 7b cannot be simultaneously removed from their equilibrium position in contact with the double seat 5 of valve.
  • the simultaneous supply of the two rooms Bedroom 1,rade2 cannot therefore operate and a faulty operation of the pressure regulation device in the cylinder chambers hydraulic is thus prevented.
  • the arrangement of the parts of the device which is the subject of the invention advantageously creates a testable set outside of its final assembly in the device for which it is intended.
  • valves 7a, 7b are not only valves of make-up capable of allowing the circulation of fluid from said double seat 5 valve to the cylinder chambers but also valves non-return capable of preventing the circulation of fluid from said chambers of the jack towards said double-seat valve 5.
  • FIG. 3 shows a first embodiment of the attachment from the tension spring 6 to the valves 16a, 16b.
  • Each of said valves 16a, 16b respectively comprises a stud 14a, 14b which extends towards the inside of the double valve seat 5.
  • Each of the pins 14a, 14b is respectively pierced with a hole 15a, 15b able to receive an end portion of the spring 6 forming a loop end.
  • said spring 6 is able to extend enough to, once the first end portion forms a loop received in the nipple hole of a valve (for example the loop left end of the spring 6 received in the hole 15a of the stud 14a of the valve 16a), allow the assembly of the second end portion forming a loop (the right end loop in this example) with the other valve (here valve 16b) and therefore the constitution of the mobile equipment consisting of said spring 6 and said valves 16a, 16b in said seat valve 5.
  • Figure 4 shows more precisely a sectional view of a device according to the invention for which the attachment of the spring 6 of pulling the valves 16a, 16b is carried out in accordance with the first mode of embodiment illustrated in Figure 3.
  • References 19 and 20 represent the communication of each of the end portions of the double seat 5 of valve to one of the hydraulic cylinder chambers, said communication of course only authorized when the corresponding valve is removed from its equilibrium position.
  • FIG. 5 shows a second embodiment of the attachment from the tension spring 6 to the valves 17a, 17b.
  • Each of the valves 17a, 17b is a ball pierced with a hole through its diameter. Said holes extend longitudinally in extension of the longitudinal axis of said double seat 5 valve and are adapted to receive an end portion of the spring 6 forming an end wire.
  • said end portions of the spring 6 forming an end wire protrude from the balls forming valves 17a, 17b and are welded at their outlet from said balls forming valves 17a, 17b at the points referenced 8 and 9 in FIG. 5.
  • the sub-assembly formed by the valves 17a, 17b and of the tension spring 6 is thus removable.
  • an adjustment of the tension of the spring 6 can be advantageously performed.
  • a first weld is all first performed (welding 8 for example) on a first portion end of the spring. Once this first weld is completed, the other end portion of the spring is stretched, while keeping the valve on the side of this other end portion of the spring in contact with the double seat 5 of valve (valve 17a in the example), until reaching the setting under desired spring tension.
  • the spring tension adjustment is schematically represented in FIG. 5 by the arrow 10.
  • the second solder solder 9 in this example
  • the stretching of the end portion forming the end wire of the spring 6 through the hole in the valve for adjusting the tension of the spring advantageously makes it possible to ensure adjustment of the valve calibration particularly precise.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
  • Safety Valves (AREA)

Abstract

The device has a hollow valve seat (5) extending longitudinally between two end portions. The seat is connected to a pressurized fluid source (18). Each end portion of the seat is connected to a chamber of a hydraulic jack and adapted to receive valves (7a, 7b) that control a supply of hydraulic fluid to the chamber. A valve return spring (6) is placed in the seat. Ends of the spring are attached to the valves.

Description

L'invention concerne un dispositif pour la régulation de la pression dans les chambres d'un vérin hydraulique notamment lorsque le vérin hydraulique est utilisé comme amortisseur.The invention relates to a device for regulating the pressure. in the chambers of a hydraulic cylinder, especially when the cylinder hydraulic is used as a shock absorber.

L'invention concerne plus particulièrement un dispositif de réalimentation en fluide hydraulique des chambres d'un vérin hydraulique utilisé comme amortisseur.The invention relates more particularly to a device for hydraulic fluid replenishment of the chambers of a hydraulic cylinder used as a shock absorber.

L'invention trouve notamment, mais non exclusivement, application dans le domaine aéronautique. Dans ce cadre, le vérin est employé par exemple comme actionneur de gouverne d'un aéronef et est apte à être utilisé pour assurer un amortissement que ce soit en mode de fonctionnement normal ou en mode de secours.The invention finds particular, but not exclusive, application in the aeronautical field. In this context, the cylinder is used by example as a steering actuator of an aircraft and is able to be used to ensure depreciation whether in normal operation or in emergency mode.

La figure 1 illustre de manière schématique un dispositif classique de régulation de la pression dans les chambres d'un vérin hydraulique 1 utilisé comme amortisseur. Ledit vérin hydraulique 1 comprend une chambre 14 remplie de fluide hydraulique dans laquelle se déplacent un piston 13 et une tige de commande 11 solidaire dudit piston 13. La position du piston 13 dans la chambre 14 définit de part et d'autre dudit piston 13 deux chambres, Chambre1 et Chambre2, respectivement à gauche et à droite dudit piston 13.FIG. 1 schematically illustrates a conventional device for pressure regulation in the chambers of a hydraulic cylinder 1 used as a shock absorber. Said hydraulic cylinder 1 comprises a chamber 14 filled with hydraulic fluid in which a piston 13 and a control rod 11 integral with said piston 13. The position of the piston 13 in the chamber 14 defines on either side of the said piston 13 two chambers, Chamber1 and Chamber2, respectively to the left and to the right of said piston 13.

Le vérin hydraulique 1 reçoit par sa tige de commande 11 un mouvement alternatif représenté par la flèche 12, ledit vérin hydraulique 1 ayant pour fonction d'amortir ledit mouvement alternatif. A cet effet, le fluide hydraulique passe d'une chambre à l'autre en traversant un restricteur 3.The hydraulic cylinder 1 receives by its control rod 11 a reciprocating movement represented by arrow 12, said hydraulic cylinder 1 having the function of damping said reciprocating movement. For this purpose, the fluid hydraulics pass from one chamber to the other through a restrictor 3.

Il se produit alors une augmentation de pression dans la chambre comprimée par le mouvement de ladite tige de commande 11 et une diminution de pression dans la chambre opposée, dite alors chambre en dépression. Si ladite chambre en dépression subit une baisse de pression importante, il peut s'y produire un phénomène de cavitation qui ne permet alors pas au dispositif amortisseur à vérin hydraulique d'assurer l'amortissement attendu. There is then an increase in pressure in the chamber compressed by the movement of said control rod 11 and a pressure decrease in the opposite chamber, then called chamber in depression. If said vacuum chamber undergoes a pressure drop important, there can occur a cavitation phenomenon which does not allow then not the hydraulic cylinder damper expected amortization.

Afin d'éviter ce phénomène de cavitation, chacune des chambres Chambre1, Chambre2 est classiquement reliée à un dispositif 2 permettant de réalimenter ledit vérin 1 en fluide hydraulique.In order to avoid this cavitation phenomenon, each of the chambers Room1, Room2 is conventionally connected to a device 2 allowing to replenish said cylinder 1 with hydraulic fluid.

Un accumulateur hydraulique 4 pressurise le fluide hydraulique au-dessus de la pression atmosphérique. Le fluide ainsi pressurisé circule depuis ledit accumulateur physique 4 vers le dispositif 2. Ledit dispositif 2 a ainsi pour fonction d'alimenter en fluide hydraulique pressurisé, lorsque cela est nécessaire, la chambre Chambre1 ou Chambre2 en dépression.A hydraulic accumulator 4 pressurizes the hydraulic fluid above of atmospheric pressure. The pressurized fluid circulates from said physical accumulator 4 to the device 2. Said device 2 has thus for the function of supplying pressurized hydraulic fluid, when this is necessary, room Room1 or Room2 in depression.

Comme cela est schématisé sur la figure 1, ledit dispositif 2 est du type "anti-retour", le fluide pouvant uniquement circuler depuis ledit dispositif 2 vers lesdites chambres Chambre1, Chambre2 dudit vérin 1.As shown diagrammatically in FIG. 1, said device 2 is of the "non-return" type, the fluid can only circulate from said device 2 to said chambers Bedroom 1, Bedroom 2 of said cylinder 1.

Le dispositif 2 de réalimentation en fluide des chambres d'un vérin hydraulique, comme celui illustré schématiquement sur la figure 1, comprend classiquement deux clapets anti-retour. Lesdits deux clapets anti-retour sont disposés séparément ou placés tête bêche dans le même alésage. Et chaque clapet anti-retour possède ainsi son propre ressort et son propre guide clapet.The device 2 for re-supplying fluid to the chambers of a jack hydraulic, like the one schematically illustrated in Figure 1, includes conventionally two check valves. Said two non-return valves are arranged separately or placed head to tail in the same bore. And each check valve thus has its own spring and its own valve guide.

De la sorte, un tel dispositif pour la réalimentation en fluide des chambres d'un vérin hydraulique est encombrant et le nombre de pièces nécessaires à sa réalisation est important. L'encombrement et la complexité de réalisation d'un tel dispositif sont en particulier tels que notamment le volume, la masse et le coût de réalisation d'un tel dispositif sont élevés.In this way, such a device for re-supplying fluid to rooms of a hydraulic cylinder is bulky and the number of parts necessary for its realization is important. The size and complexity of such a device are in particular such as in particular the volume, mass and cost of producing such a device are high.

Un but de l'invention est de pallier à ces inconvénients précités.An object of the invention is to overcome these aforementioned drawbacks.

A cet effet, l'invention propose un dispositif de régulation de la pression dans les chambres d'un vérin hydraulique comportant un siège de clapet creux s'étendant sensiblement longitudinalement entre deux portions d'extrémité, le corps du siège de clapet étant connecté à une source de fluide pressurisé , chacune des portions d'extrémités du siège de clapet étant reliée à une chambre du vérin hydraulique et adaptée pour accueillir un clapet permettant de contrôler la réalimentation en fluide hydraulique de ladite chambre du vérin, caractérisé en ce qu'un ressort de rappel de clapet est disposé dans ledit siège de clapet et en ce que chacune des extrémités dudit ressort de rappel de clapet est accrochée à un desdits clapets.To this end, the invention proposes a device for regulating the pressure in the chambers of a hydraulic cylinder comprising a seat hollow valve extending substantially longitudinally between two portions end, the body of the valve seat being connected to a source of pressurized fluid, each of the end portions of the valve seat being connected to a chamber of the hydraulic cylinder and adapted to accommodate a valve to control the hydraulic fluid replenishment of said cylinder chamber, characterized in that a valve return spring is arranged in said valve seat and in that each of the ends of said valve return spring is hooked to one of said valves.

De telle sorte, le dispositif objet de l'invention ne nécessite qu'un seul ressort. De plus, l'équipement mobile constitué du ressort et des clapets n'a pas besoin d'être guidé. Du fait de la force de rappel exercée par ledit ressort, les clapets reviennent effectivement automatiquement, après leur levée, sur les portions d'extrémités du siège de clapet. Le dispositif objet de l'invention ne fait donc pas usage de guides clapets. L'encombrement du dispositif objet de l'invention est ainsi limité et sa réalisation est simplifiée.In this way, the device which is the subject of the invention requires only one spring. In addition, the mobile equipment consisting of the spring and the valves has no need to be guided. Due to the restoring force exerted by said spring, the valves effectively return automatically, after their lifted, on the end portions of the valve seat. The device object of the invention therefore does not make use of valve guides. The size of the device object of the invention is thus limited and its implementation is simplified.

Le dispositif objet de l'invention empêche en outre la circulation de fluide hydraulique depuis lesdites chambres du vérin vers ledit siège de clapet, lesdits clapets faisant ainsi également office de clapets anti-retour.The object of the invention also prevents the circulation of hydraulic fluid from said cylinder chambers to said seat valve, said valves thus also acting as non-return valves.

De manière préférentielle, l'écartement de chacun des clapets depuis sa position d'équilibre au contact de la portion d'extrémité correspondante du siège de clapet est réalisé dès lors qu'une différence de pression suffisante existe entre la chambre du vérin hydraulique à laquelle ladite portion d'extrémité dudit siège de clapet est reliée et l'intérieur dudit siège de clapet, autorisant de la sorte la réalimentation en fluide hydraulique pressurisé de ladite chambre du vérin.Preferably, the spacing of each of the valves from its equilibrium position in contact with the corresponding end portion of the valve seat is produced as soon as a sufficient pressure difference exists between the chamber of the hydraulic cylinder to which said portion end of said valve seat is connected and the interior of said valve seat, thereby authorizing the replenishment of pressurized hydraulic fluid from said cylinder chamber.

De manière préférentielle, chacune des extrémités du ressort de rappel de clapet est accrochée à un des clapets sensiblement en son centre de manière adaptée pour que l'équipement mobile constitué du ressort et des clapets n'ait pas besoin d'être guidé, lesdits clapets revenant notamment automatiquement sur leur position d'équilibre après en avoir été écarté, y compris si lesdits clapets n'ont pas écartés parfaitement dans l'axe du siège de clapet.Preferably, each of the ends of the spring of valve reminder is attached to one of the valves substantially in its center suitably so that the mobile equipment consisting of the spring and valves need not be guided, said valves returning in particular automatically on their equilibrium position after being removed from it, including understood if the said valves have not moved perfectly in the axis of the seat valve.

De manière non limitative, les clapets utilisés dans le cadre de l'invention sont de portée sphérique ou conique.Without limitation, the valves used in the context of the invention are spherical or conical in scope.

Selon un premier mode de réalisation de l'invention, un trou traverse chacun des clapets et chacune des portions d'extrémité du ressort forme un fil d'extrémité apte à venir s'introduire dans lesdits trous. Lesdits fils d'extrémité dépassent des trous et sont soudés à leur sortie auxdits clapets pour permettre l'accrochage de chacune des extrémités dudit ressort à un desdits clapets.According to a first embodiment of the invention, a through hole each of the valves and each of the end portions of the spring forms a end wire capable of coming into said holes. Said sons end protrude from the holes and are welded at their outlet to said valves to allow the attachment of each end of said spring to a of said valves.

De manière avantageuse, un réglage de la tension du ressort est réalisé, une fois une première portion d'extrémité du ressort soudée à un premier clapet, en étirant l'autre portion d'extrémité du ressort à travers le trou traversant diamétralement le second clapet jusqu'à obtenir la mise sous tension désirée. L'autre portion d'extrémité dudit ressort est ensuite soudée audit second clapet.Advantageously, an adjustment of the spring tension is once a first end portion of the spring is welded to a first valve, by stretching the other end portion of the spring through the hole diametrically crossing the second valve until the setting under desired tension. The other end portion of said spring is then welded audit second valve.

Selon un second mode de réalisation de l'invention, les clapets comportent un téton percé d'un trou et chacune des portions d'extrémité du ressort de rappel de clapet forme une boucle d'extrémité. Lesdites boucles d'extrémité sont reçues dans lesdits trous des tétons pour permettre l'accrochage de chacune des extrémités dudit ressort de rappel de clapet à un desdits clapets.According to a second embodiment of the invention, the valves have a stud pierced with a hole and each of the end portions of the valve return spring forms an end loop. Said loops end are received in said nipple holes to allow the attachment of each end of said valve return spring to one of said valves.

De manière préférentielle, lesdits clapets ne peuvent être simultanément écartés desdites portions d'extrémité dudit siège de clapet, ce qui empêche l'alimentation simultanée des chambres dudit vérin.Preferably, said valves cannot be simultaneously spaced from said end portions of said valve seat, this which prevents the simultaneous supply of the chambers of said cylinder.

D'autres caractéristiques, buts et avantages de l'invention apparaítront à la lecture de la description détaillée qui va suivre, et au regard des dessins annexés, donnés à titre d'exemples non limitatifs et sur lesquels :

  • la figure 1, déjà commentée, représente schématiquement un dispositif de régulation de la pression dans les chambres d'un vérin hydraulique utilisé comme amortisseur ;
  • la figure 2 représente schématiquement le dispositif pour la réalimentation en fluide des chambres d'un vérin hydraulique objet de l'invention ;
  • la figure 3 illustre un premier mode de réalisation de l'accrochage du ressort de traction aux clapets à portée sphérique ;
  • La figure 4 représente une vue en coupe d'un dispositif conforme à l'invention, l'accrochage du ressort de traction aux clapets étant réalisé conformément au premier mode de réalisation illustré sur la figure 3 ;
  • la figure 5 illustre un second mode de réalisation de l'accrochage du ressort de traction aux clapets à portée sphérique.
Other characteristics, objects and advantages of the invention will appear on reading the detailed description which follows, and with regard to the appended drawings, given by way of nonlimiting examples and in which:
  • FIG. 1, already commented on, schematically represents a device for regulating the pressure in the chambers of a hydraulic cylinder used as a shock absorber;
  • FIG. 2 schematically represents the device for replenishing the fluid in the chambers of a hydraulic cylinder object of the invention;
  • FIG. 3 illustrates a first embodiment of the attachment of the tension spring to the valves with spherical bearing;
  • 4 shows a sectional view of a device according to the invention, the attachment of the tension spring to the valves being made in accordance with the first embodiment illustrated in Figure 3;
  • FIG. 5 illustrates a second embodiment of the attachment of the tension spring to the valves with spherical bearing.

Comme cela est représenté sur la figure 2, le dispositif 2 objet de l'invention pour la réalimentation en fluide des chambres d'un vérin hydraulique comporte un siège 5 de clapet qui reçoit l'alimentation en fluide de l'accumulateur hydraulique auquel il est relié via le conduit 18.As shown in Figure 2, the device 2 object of the invention for the fluid supply of the chambers of a jack hydraulic comprises a valve seat 5 which receives the fluid supply of the hydraulic accumulator to which it is connected via conduit 18.

Ledit siège 5 de clapet est sensiblement cylindrique et est rempli de fluide hydraulique préalablement pressurisé par l'accumulateur hydraulique. Ledit siège 5 de clapet dispose à chacune de ses extrémités d'un siège de clapet apte à accueillir un clapet 7a, 7b et sera pour cette raison dénommé par la suite double-siège de clapet.Said valve seat 5 is substantially cylindrical and is filled with hydraulic fluid previously pressurized by the hydraulic accumulator. Said valve seat 5 has at each of its ends a seat of valve capable of accommodating a valve 7a, 7b and will therefore be called subsequently double-seat valve.

Les clapets 7a, 7b ont préférentiellement une portée sphérique ou conique de manière à venir efficacement au contact de chacune des portions d'extrémité du double-siège 5 de clapet pour assurer l'étanchéité du dispositif objet de l'invention.The valves 7a, 7b preferably have a spherical bearing or conical so as to come into effective contact with each of the portions end of the double-seat valve 5 for sealing the device subject of the invention.

Chacune des extrémités du double-siège 5 de clapet est reliée à l'une des chambres Chambre1, Chambre2 du vérin hydraulique utilisé comme amortisseur permettant, lorsque cela est nécessaire, la réalimentation en fluide hydraulique de l'une des chambres Chambre1, Chambre2 du vérin hydraulique.Each end of the double valve seat 5 is connected to one of rooms Room1, Room2 of the hydraulic cylinder used as shock absorber allowing, when necessary, the re-supply of hydraulic fluid from one of the chambers Chamber1, Chamber2 of the cylinder hydraulic.

Un ressort de traction 6 est disposé au centre dudit double-siège 5 de clapet et les clapets 7a, 7b sont accrochés respectivement à chacune des extrémités dudit ressort de traction 6.A tension spring 6 is arranged in the center of said double seat 5 of valve and the valves 7a, 7b are hooked respectively to each of the ends of said tension spring 6.

De manière avantageuse, les clapets 7a, 7b sont tirés en leur centre par chacune des extrémités dudit ressort de traction 6.Advantageously, the valves 7a, 7b are drawn in their center by each of the ends of said tension spring 6.

De telle sorte, lesdits deux clapets 7a, 7b reliés entre eux par ledit ressort de traction 6 sont, dans leur position d'équilibre, logés dans leur siège respectif de part et d'autre dudit double-siège 5 de clapet rempli de fluide pressurisé. La force de rappel exercée par le ressort 6 sur chacun des clapets 7a, 7b sensiblement en leur centre permet de maintenir lesdits clapets 7a, 7b au contact dudit double-siège 5 de clapet et de prévenir l'écoulement dudit fluide vers l'une des chambres.So, said two valves 7a, 7b connected together by said tension spring 6 are, in their equilibrium position, housed in their seats respective on either side of said double seat 5 of valve filled with fluid pressurized. The restoring force exerted by the spring 6 on each of the valves 7a, 7b substantially in their center allows to maintain said valves 7a, 7b in contact with said double-seat valve 5 and prevent the flow of said fluid towards one of the chambers.

Le ressort de traction 6 constitue avantageusement un ressort de rappel de clapet. Après avoir été écartés de leur position d'équilibre, lesdits clapets 7a, 7b reviennent effectivement automatiquement, du fait de la force de rappel exercée par ledit ressort 6, en position d'équilibre, se loger dans leur siège respectif, y compris si lesdits clapets n'ont pas écartés parfaitement dans l'axe dudit double-siège 5 de clapet. L'équipement mobile constitué du ressort 6 et desdits clapets 7a, 7b n'a ainsi, par construction, pas besoin d'être guidé.The tension spring 6 advantageously constitutes a spring of valve reminder. After being removed from their equilibrium position, said valves 7a, 7b effectively return automatically, due to the force of return exerted by said spring 6, in equilibrium position, to be housed in their respective seats, including if the said valves have not moved aside perfectly in line with said double valve seat 5. Mobile equipment consisting of the spring 6 and said valves 7a, 7b has thus, by construction, no need to be guided.

Dès lors la différence de pression entre l'une des chambres Chambre1 ou Chambre2 du vérin hydraulique alors en dépression et l'intérieur du double-siège 5 de clapet est suffisamment importante, le clapet relié à ladite chambre en dépression s'écarte de sa position d'équilibre. Le ressort 6 est alors étiré du côté correspondant audit clapet écarté de sa position d'équilibre, exerçant sur celui-ci une force de rappel, et le fluide pressurisé contenu dans le double-siège 5 de clapet s'écoule alors vers ladite chambre en dépression. Une fois la différence de pression régularisée, ledit clapet revient, du fait de la force de rappel exercée sur ledit ressort 6, sur sa position d'équilibre au contact du double-siège 5 de clapet bloquant ainsi l'écoulement du fluide hydraulique.Consequently, the pressure difference between one of the rooms Chambre1 or Chamber2 of the hydraulic cylinder then under vacuum and the interior of the double-seat valve 5 is sufficiently large, the valve connected to said chamber in depression deviates from its equilibrium position. Spring 6 is then stretched on the side corresponding to said valve discarded from its position of equilibrium, exerting on it a restoring force, and the pressurized fluid contained in the double valve seat 5 then flows towards said chamber in depression. Once the pressure difference has been regularized, said valve returns, due to the restoring force exerted on said spring 6, on its equilibrium position in contact with the double seat 5 of the valve thus blocking the flow of hydraulic fluid.

De manière avantageuse, lesdits clapets 7a, 7b ne peuvent être simultanément écartés de leur position d'équilibre au contact du double-siège 5 de clapet. L'alimentation simultanée des deux chambres Chambre1, Chambre2 ne peut donc s'opérer et un fonctionnement défectueux du dispositif de régulation de la pression dans les chambres du vérin hydraulique est ainsi prévenu. Advantageously, said valves 7a, 7b cannot be simultaneously removed from their equilibrium position in contact with the double seat 5 of valve. The simultaneous supply of the two rooms Bedroom 1, Chambre2 cannot therefore operate and a faulty operation of the pressure regulation device in the cylinder chambers hydraulic is thus prevented.

En outre, l'agencement des pièces du dispositif objet de l'invention permet de créer avantageusement un ensemble testable en dehors de son montage définitif dans l'appareil auquel il est destiné.In addition, the arrangement of the parts of the device which is the subject of the invention advantageously creates a testable set outside of its final assembly in the device for which it is intended.

Bien entendu, les clapets 7a, 7b sont non seulement des clapets de réalimentation aptes à permettre la circulation de fluide depuis ledit double-siège 5 de clapet vers les chambres du vérin mais également des clapets anti-retour aptes à empêcher la circulation de fluide depuis lesdites chambres du vérin vers ledit double-siège 5 de clapet.Of course, the valves 7a, 7b are not only valves of make-up capable of allowing the circulation of fluid from said double seat 5 valve to the cylinder chambers but also valves non-return capable of preventing the circulation of fluid from said chambers of the jack towards said double-seat valve 5.

La description qui suit présente de manière non limitative deux modes de réalisation particuliers de l'invention, et plus précisément deux modes de réalisation de l'accrochage du ressort de traction aux clapets à portée sphérique.The following description non-limitingly presents two modes particular embodiments of the invention, and more precisely two modes of attachment of the tension spring to the valves within reach spherical.

La figure 3 présente un premier mode de réalisation de l'accrochage du ressort de traction 6 aux clapets 16a, 16b. Chacun desdits clapets 16a, 16b comporte respectivement un téton 14a, 14b qui s'étend vers l'intérieur du double-siège 5 de clapet.Figure 3 shows a first embodiment of the attachment from the tension spring 6 to the valves 16a, 16b. Each of said valves 16a, 16b respectively comprises a stud 14a, 14b which extends towards the inside of the double valve seat 5.

Chacun des tétons 14a, 14b est percé respectivement d'un trou 15a, 15b apte à recevoir une portion d'extrémité du ressort 6 formant une boucle d'extrémité. De manière avantageuse, ledit ressort 6 est apte à s'étendre suffisamment pour, une fois la première portion d'extrémité formant une boucle reçue dans le trou du téton d'un clapet (par exemple la boucle d'extrémité gauche du ressort 6 reçue dans le trou 15a du téton 14a du clapet 16a), permettre l'assemblage de la deuxième portion d'extrémité formant une boucle (la boucle d'extrémité droite dans cet exemple) avec l'autre clapet (ici le clapet 16b) et donc la constitution de l'équipement mobile constitué dudit ressort 6 et desdits clapets 16a, 16b dans ledit siège de clapet 5.Each of the pins 14a, 14b is respectively pierced with a hole 15a, 15b able to receive an end portion of the spring 6 forming a loop end. Advantageously, said spring 6 is able to extend enough to, once the first end portion forms a loop received in the nipple hole of a valve (for example the loop left end of the spring 6 received in the hole 15a of the stud 14a of the valve 16a), allow the assembly of the second end portion forming a loop (the right end loop in this example) with the other valve (here valve 16b) and therefore the constitution of the mobile equipment consisting of said spring 6 and said valves 16a, 16b in said seat valve 5.

La figure 4 représente de manière plus précise une vue en coupe d'un dispositif conforme à l'invention pour lequel l'accrochage du ressort 6 de traction aux clapets 16a, 16b est réalisé conformément au premier mode de réalisation illustré sur la figure 3. Les références 19 et 20 représentent la communication de chacune des portions d'extrémité du double-siège 5 de clapet à une des chambres du vérin hydraulique, ladite communication n'étant bien entendu autorisée que lorsque le clapet correspondant est écarté de sa position d'équilibre.Figure 4 shows more precisely a sectional view of a device according to the invention for which the attachment of the spring 6 of pulling the valves 16a, 16b is carried out in accordance with the first mode of embodiment illustrated in Figure 3. References 19 and 20 represent the communication of each of the end portions of the double seat 5 of valve to one of the hydraulic cylinder chambers, said communication of course only authorized when the corresponding valve is removed from its equilibrium position.

La figure 5 présente un second mode de réalisation de l'accrochage du ressort de traction 6 aux clapets 17a, 17b. Chacun des clapets 17a, 17b est une bille percée d'un trou à travers son diamètre. Lesdits trous s'étendent longitudinalement en prolongement de l'axe longitudinal dudit double-siège 5 de clapet et sont aptes à recevoir une portion d'extrémité du ressort 6 formant un fil d'extrémité.Figure 5 shows a second embodiment of the attachment from the tension spring 6 to the valves 17a, 17b. Each of the valves 17a, 17b is a ball pierced with a hole through its diameter. Said holes extend longitudinally in extension of the longitudinal axis of said double seat 5 valve and are adapted to receive an end portion of the spring 6 forming an end wire.

De manière préférentielle, lesdites portions d'extrémité du ressort 6 formant un fil d'extrémité dépassent des billes formant clapets 17a, 17b et sont soudées à leur sortie desdites billes formant clapets 17a, 17b aux points référencés 8 et 9 sur la figure 5. Le sous-ensemble formé des clapets 17a, 17b et du ressort de traction 6 est ainsi indémontable.Preferably, said end portions of the spring 6 forming an end wire protrude from the balls forming valves 17a, 17b and are welded at their outlet from said balls forming valves 17a, 17b at the points referenced 8 and 9 in FIG. 5. The sub-assembly formed by the valves 17a, 17b and of the tension spring 6 is thus removable.

Lors de l'opération de soudure des portions d'extrémité du ressort aux billes formant clapet, un réglage de la tension du ressort 6 peut être avantageusement effectué. A cet effet, une première soudure est tout d'abord réalisée (la soudure 8 par exemple) sur une première portion d'extrémité du ressort. Une fois cette première soudure réalisée, l'autre portion d'extrémité du ressort est étirée, tout en maintenant le clapet du côté de cette autre portion d'extrémité du ressort au contact du double-siège 5 de clapet (le clapet 17a dans le cadre de l'exemple), jusqu'à atteindre la mise sous tension du ressort désirée. Le réglage de la tension du ressort est schématiquement représenté sur la figure 5 par la flèche 10. La deuxième soudure (la soudure 9 dans cet exemple) est ensuite effectuée pour rendre indémontable le sous-ensemble formé desdits clapets 17a, 17b et du ressort de traction 6. L'étirement de la portion d'extrémité formant fil d'extrémité du ressort 6 à travers le trou dans le clapet en vue du réglage de la tension du ressort permet avantageusement d'assurer un réglage du tarage de clapet particulièrement précis. During the welding operation of the end portions of the spring to the balls forming a valve, an adjustment of the tension of the spring 6 can be advantageously performed. For this purpose, a first weld is all first performed (welding 8 for example) on a first portion end of the spring. Once this first weld is completed, the other end portion of the spring is stretched, while keeping the valve on the side of this other end portion of the spring in contact with the double seat 5 of valve (valve 17a in the example), until reaching the setting under desired spring tension. The spring tension adjustment is schematically represented in FIG. 5 by the arrow 10. The second solder (solder 9 in this example) is then performed to make non-removable the sub-assembly formed by said valves 17a, 17b and the spring 6. The stretching of the end portion forming the end wire of the spring 6 through the hole in the valve for adjusting the tension of the spring advantageously makes it possible to ensure adjustment of the valve calibration particularly precise.

Bien entendu, l'invention n'est pas limitée aux modes de réalisation particuliers qui viennent d'être décrits, mais s'étend à toute variante conforme à son esprit.Of course, the invention is not limited to the embodiments particulars which have just been described, but extends to any variant conforms to his spirit.

Claims (9)

Dispositif de régulation de la pression dans les chambres d'un vérin hydraulique comportant un siège (5) de clapet creux s'étendant sensiblement longitudinalement entre deux portions d'extrémité, le corps du siège (5) de clapet étant connecté à une source de fluide pressurisé (18), chacune des portions d'extrémités du siège (5) de clapet étant reliée à une chambre dudit vérin hydraulique et adaptée pour accueillir un clapet (7a, 7b) permettant de contrôler la réalimentation en fluide hydraulique de la chambre du vérin, caractérisé en ce qu'un ressort (6) de rappel de clapet est disposé dans ledit siège (5) de clapet et en ce que chacune des extrémités dudit ressort (6) de rappel de clapet est accrochée à un desdits clapets (7a, 7b).Device for regulating the pressure in the chambers of a hydraulic cylinder comprising a hollow valve seat (5) extending substantially longitudinally between two end portions, the body of the valve seat (5) being connected to a source of pressurized fluid (18), each of the end portions of the valve seat (5) being connected to a chamber of said hydraulic cylinder and adapted to accommodate a valve (7a, 7b) making it possible to control the replenishment of hydraulic fluid in the chamber of the cylinder, characterized in that a valve return spring (6) is arranged in said valve seat (5) and in that each end of said valve return spring (6) is hooked to one of said valves (7a , 7b). Dispositif selon la revendication 1, caractérisé en ce qu'il empêche en outre la circulation de fluide hydraulique depuis lesdites chambres du vérin vers ledit siège (5) de clapet, lesdits clapets (7a, 7b) faisant ainsi également office de clapets anti-retour.Device according to claim 1, characterized in that it also prevents the circulation of hydraulic fluid from said chambers of the jack to said valve seat (5), said valves (7a, 7b) thus also acting as non-return valves . Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'un des clapets (7a, 7b) est écarté de sa position d'équilibre au contact de la portion d'extrémité correspondante dudit siège (5) de clapet dès lors qu'une différence de pression suffisante existe entre la chambre du vérin hydraulique à laquelle ladite portion d'extrémité dudit siège (5) de clapet est reliée et l'intérieur dudit siège (5) de clapet, autorisant de la sorte la réalimentation en fluide pressurisé de ladite chambre du vérin.Device according to one of the preceding claims, characterized in that one of the valves (7a, 7b) is moved away from its equilibrium position in contact with the corresponding end portion of said valve seat (5) as soon as a sufficient pressure difference exists between the chamber of the hydraulic cylinder to which said end portion of said valve seat (5) is connected and the interior of said valve seat (5), thereby authorizing the replenishment of pressurized fluid of said cylinder chamber. Dispositif selon l'une des revendications précédentes, caractérisé en ce que chacune des extrémités du ressort (6) de rappel de clapet est accrochée à un des clapets (7a, 7b) sensiblement en son centre de manière adaptée pour que l'équipement mobile constitué dudit ressort (6) et desdits clapets (7a, 7b) n'ait pas besoin d'être guidé. Device according to one of the preceding claims, characterized in that each of the ends of the valve return spring (6) is attached to one of the valves (7a, 7b) substantially at its center so as to be suitable for the mobile equipment constituted said spring (6) and said valves (7a, 7b) need not be guided. Dispositif selon l'une des revendications précédentes, caractérisé en ce que les clapets (7a, 7b) sont de portée sphérique ou conique.Device according to one of the preceding claims, characterized in that the valves (7a, 7b) are of spherical or conical bearing. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, un trou traversant chacun des clapets (17a, 17b) et chacune des portions d'extrémité dudit ressort (6) formant un fil d'extrémité apte à venir s'introduire dans lesdits trous, lesdites portions d'extrémité formant fil dépassent desdits trous et sont soudés à leur sortie desdits trous auxdits clapets (17a, 17b) pour permettre l'accrochage de chacune des extrémités dudit ressort (6) à un desdits clapets (17a, 17b).Device according to one of the preceding claims, characterized in that , a hole passing through each of the valves (17a, 17b) and each of the end portions of said spring (6) forming an end wire capable of being introduced into said holes, said wire end portions protrude from said holes and are welded at their outlet from said holes to said valves (17a, 17b) to allow the hooking of each of the ends of said spring (6) to one of said valves (17a, 17b ). Dispositif selon la revendication 6, caractérisé en ce qu'un réglage de la tension du ressort (6) est réalisé, une fois une première portion d'extrémité dudit ressort (6) formant fil d'extrémité soudée à un premier clapet, en étirant l'autre portion d'extrémité dudit ressort (6) à travers le trou traversant diamétralement le second clapet jusqu'à obtenir la mise sous tension désirée, ladite autre portion d'extrémité dudit ressort (6) étant alors soudée audit second clapet.Device according to claim 6, characterized in that an adjustment of the tension of the spring (6) is carried out, once a first end portion of said spring (6) forming end wire welded to a first valve, by stretching the other end portion of said spring (6) through the hole diametrically passing through the second valve until the desired tension is obtained, said other end portion of said spring (6) then being welded to said second valve. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que, les clapets (16a, 16b) comportant un téton (14a, 14b) percé d'un trou (15a, 15b) et chacune desdites portions d'extrémité dudit ressort (6) formant une boucle d'extrémité, lesdites boucles d'extrémité sont reçues dans les trous (15a, 15b) desdits tétons (14a, 14b) pour permettre l'accrochage de chacune des extrémités dudit ressort (6) à un desdits clapets (16a, 16b).Device according to one of claims 1 to 5, characterized in that , the valves (16a, 16b) comprising a stud (14a, 14b) pierced with a hole (15a, 15b) and each of said end portions of said spring (6) forming an end loop, said end loops are received in the holes (15a, 15b) of said pins (14a, 14b) to allow the hooking of each of the ends of said spring (6) to one of said valves (16a, 16b). Dispositif selon l'une des revendications précédentes, caractérisé en ce que lesdits clapets (7a, 7b) ne peuvent être simultanément écartés desdites portions d'extrémité dudit siège de clapet (5), l'alimentation simultanée desdites chambres dudit vérin étant ainsi prévenue.Device according to one of the preceding claims, characterized in that said valves (7a, 7b) cannot be simultaneously separated from said end portions of said valve seat (5), the simultaneous supply of said chambers of said cylinder being thus prevented.
EP20040290911 2003-04-09 2004-04-06 Device for replenishing the chambers of a hydraulic actuating cylinder Expired - Fee Related EP1467118B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0304385A FR2853708B1 (en) 2003-04-09 2003-04-09 DEVICE FOR REALIMENTING THE CHAMBERS OF A HYDRAULIC CYLINDER
FR0304385 2003-04-09

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EP1467118A2 true EP1467118A2 (en) 2004-10-13
EP1467118A3 EP1467118A3 (en) 2004-11-03
EP1467118B1 EP1467118B1 (en) 2005-11-16

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US (1) US7007588B2 (en)
EP (1) EP1467118B1 (en)
DE (1) DE602004000184T2 (en)
ES (1) ES2248786T3 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007020052A1 (en) * 2005-08-16 2007-02-22 Trw Automotive Gmbh Hydraulic actuator, in particular for a chassis stabilising system and a hydraulic circuit provided therewith
US7377372B2 (en) 2004-12-06 2008-05-27 öHLINS RACING AB Telescopic fork leg

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB2150259A (en) * 1983-10-19 1985-06-26 Pipe Supports Ltd Hydraulic shock arrestor for pipes; valves
JPH1163081A (en) * 1997-08-27 1999-03-05 Sanwa Tekki Corp Vibration frequency sensitive hydraulic damping apparatus
US6390254B1 (en) * 1997-07-10 2002-05-21 Honeywell International Inc. Constant volume damper

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Publication number Priority date Publication date Assignee Title
GB2150259A (en) * 1983-10-19 1985-06-26 Pipe Supports Ltd Hydraulic shock arrestor for pipes; valves
US6390254B1 (en) * 1997-07-10 2002-05-21 Honeywell International Inc. Constant volume damper
JPH1163081A (en) * 1997-08-27 1999-03-05 Sanwa Tekki Corp Vibration frequency sensitive hydraulic damping apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7377372B2 (en) 2004-12-06 2008-05-27 öHLINS RACING AB Telescopic fork leg
WO2007020052A1 (en) * 2005-08-16 2007-02-22 Trw Automotive Gmbh Hydraulic actuator, in particular for a chassis stabilising system and a hydraulic circuit provided therewith

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DE602004000184T2 (en) 2006-06-29
FR2853708A1 (en) 2004-10-15
US20040255772A1 (en) 2004-12-23
US7007588B2 (en) 2006-03-07
EP1467118B1 (en) 2005-11-16
DE602004000184D1 (en) 2005-12-22
ES2248786T3 (en) 2006-03-16
EP1467118A3 (en) 2004-11-03
FR2853708B1 (en) 2005-05-27

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