[go: up one dir, main page]

EP0194990A2 - Installation for clamping a wear element in a slide gate nozzle for a metallurgical container - Google Patents

Installation for clamping a wear element in a slide gate nozzle for a metallurgical container Download PDF

Info

Publication number
EP0194990A2
EP0194990A2 EP86870035A EP86870035A EP0194990A2 EP 0194990 A2 EP0194990 A2 EP 0194990A2 EP 86870035 A EP86870035 A EP 86870035A EP 86870035 A EP86870035 A EP 86870035A EP 0194990 A2 EP0194990 A2 EP 0194990A2
Authority
EP
European Patent Office
Prior art keywords
frame
plate
rotation
axis
cam
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
Application number
EP86870035A
Other languages
German (de)
French (fr)
Other versions
EP0194990A3 (en
EP0194990B1 (en
Inventor
François-Noel Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vesuvius International Corp
Original Assignee
Vesuvius International Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vesuvius International Corp filed Critical Vesuvius International Corp
Publication of EP0194990A2 publication Critical patent/EP0194990A2/en
Publication of EP0194990A3 publication Critical patent/EP0194990A3/en
Application granted granted Critical
Publication of EP0194990B1 publication Critical patent/EP0194990B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor
    • B22D41/34—Supporting, fixing or centering means therefor

Definitions

  • the present invention relates to a device for clamping a wear element of a sliding closure of a metallurgical container intended for controlling the flow rate of molten metal, consisting of a refractory material possibly surrounded by a metal frame, mounted in a metal frame provided with a bottom wall and lateral stops against which bears at least one wear element.
  • the wear elements essentially an internal nozzle ensuring the connection between the metallurgical container and the sliding closure, an upper fixed plate pierced with at least one orifice opposite the internal nozzle, a sliding plate provided with at least one sliding orifice joined against the fixed plate, possibly a lower fixed plate and a collecting nozzle.
  • These wear elements are made of refractory material surrounded at least partially by a jacket forming a lost formwork. These elements provided with their metal frame are clamped in a support frame.
  • the plates must generally be applied against a bottom formed in the associated metal frame.
  • Known devices do not provide for pushing the plate against the bottom of the frame, an operation generally carried out manually or by pressing during the sliding closure. This process presents the double danger of introducing a human factor and of delaying this setting up action beyond the time of sintering of the grouts ensuring the joints.
  • the present invention aims to remedy the drawbacks described above and proposes a device which makes it possible simultaneously to clamp the plate against the bottom of the frame, to absorb the clearances between the plate and the lateral stops and to wedge the plate in the frame, while avoiding the use of fasteners.
  • a sliding closure device for a metallurgical container in particular a distributor containing a metal bath, essentially characterized in that it consists of a rotary member driving in rotation a cam having an inclined face which repels a face of a wear element based on a substantially parallel flange of the frame opposite the bottom thereof so as to simultaneously press the plate possibly provided with a frame against the bottom of the frame, the clamping of the plate against the lateral stops and the wedging of the plate in the frame .
  • the clamping device has at each end of the central part of the rotary member forming a cam two coaxial pivot axes.
  • the device is mounted in a housing delimited by the frame, in the walls are formed two circular cylindrical orifices coaxial on an axis perpendicular to the bottom of the frame, the large orifice possibly open on the side of the bottom of the frame being intended to receive the large pivot axis to which it serves as a rotation bearing, the small orifice situated on the opposite side with respect to the bottom of the frame having a diameter slightly greater than that of the small pivot axis to which it takes place rotation bearing, the bottom wall of the housing perpendicular to the axis of rotation of the rotary lock being determined with a view to serving as an axial stop for the bearing face of the rotary lock.
  • the cam advantageously has the shape of a helix coaxial with the pivot axes, a flat being formed on the generator cylinder of the propeller in order to allow the introduction of the plate into the frame when the flat is brought opposite the plate.
  • the preferred form is that of a helix with an axis parallel to the axis of rotation of the rotary bolt, the axis of the propeller being eccentric relative to the axis of rotation of the rotary lock.
  • the device can include several clamping devices distributed around the periphery of the plate.
  • FIG. 1 shows a metal frame, generally designated by the reference notation 1.
  • This frame has a bottom wall 2 and lateral flanges 3. It encloses a wear element 4 of a sliding closure for metallurgical container.
  • the wear element is usually a plate of refractory material possibly surrounded by a metal jacket 5.
  • the lateral flange 3 of the frame 1 consists of an angle folded at a right angle intended to reinforce the rigidity of the frame. In the vicinity of opposite corners, there are provided cavities intended to each accommodate a clamping device 6.
  • the wear element consisting of a plate 4 is tightened in frame 1 by the rotary lock 3.
  • the sliding closure is then in the form of a set of parts nested one inside the other. and wedged by a rotary member locking the plate between the inclined face of the cam 7 and the bottom 2 of the frame 1.
  • the plate 4 wedges the rotary lock between the parallel inclined face of the bearing surface 16 of the plate and the bottom 15 of housing 6 '.
  • the size of the clamping device is very reduced both in thickness and in diameter, which makes it easy to accommodate it in existing devices.
  • the rotary bolt 6 must exert on the bearing surface 13 of the plate 1 forces directed simultaneously towards the bottom 2 of the frame 2 and towards the center of the plate 4.
  • two effects can be used independently or in combination to achieve this result.
  • the cam 7 has the shape of a helix coaxial with the pivot axes 8, 9.
  • the rotation of the rotary lock 3 causes a movement of the place of contact of the cam 7 with the bearing surface 13 towards the bottom 12 of the frame parallel to the axis of rotation of the rotary lock 6.
  • the rotation of the rotary bolt 6 causes the displacement of the contact point of the cam 7 and of the bearing surface 13 towards the center of the plate. Pressing one against the other along inclined contact faces, of the cam 7 and of the frame 5 guarantees double tightening towards the bottom 2 of the frame 2 and towards the center of the plate.
  • the cam 7 has the shape of a propeller whose axis is parallel but slightly eccentric relative to the axis of rotation of the rotary bolt 3. This device uses in combination the two propeller and eccentric effects previously described.
  • the new closure device provides significant advantages in terms of robustness, production cost, size and reliability.
  • the rotary lock is massive and can advantageously be made in one piece from the cast metal.
  • Figure 1 shows two clamping devices 6 arranged in the frame 2, diametrically opposite with respect to the plate in a direction spaced less than 30 ° from the axis of the movement of the sliding closure. Such a device makes it possible to uniformly tighten the plate 4 against the bottom 2 of the frame 1.
  • bearing surface 13 can be provided on any other part of the plate 4 and have various shapes provided that it has an inclined face opposite the side opposite the bottom 2 of the frame 1.
  • a similar device can be provided in the large pivot axis 8, in particular in the case where accessibility on the bottom side of the frame proves more advantageous.
  • the large pivot axis 8 is provided with a handle in order to produce rotation.
  • Similar handles can be attached to the small pivot axis 9 provided that they do not have any interaction with the opposite parts of the plate 4 during the operations of the sliding closure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Clamps And Clips (AREA)

Abstract

La présente invention concerne un dispositif de serrage (6) d'un élément d'usure (4) d'une fermeture coulissante pour conteneur métallurgique dans lequel les éléments d'usure (4) sont maintenus à serrage dans un cadre métallique (1) à l'aide d' organes rotatifs (6) assurant simultanément le verrouillage de la plaque contre le cadre (1), le serrage de la plaque contre le fond (2) du cadre (1) et la résorbtion des jeux latéraux de la plaque dans le cadre (1) des dispositifs de serrage décrits sont de conception très simple et très robuste. Ils ne comportent aucune pièce vissée.The present invention relates to a device (6) for clamping a wear element (4) of a sliding closure for a metallurgical container in which the wear elements (4) are held tight in a metal frame (1). using rotary members (6) simultaneously ensuring the locking of the plate against the frame (1), the tightening of the plate against the bottom (2) of the frame (1) and the absorption of the lateral clearances of the plate in the context (1) of the clamping devices described are of very simple and very robust design. They do not have any screwed parts.

Description

La présente invention est relative à un dispositif de serrage d'un élément d'usure d'une fermeture coulissante de conteneur métallurgique destinée au contrôle du débit de métal fondu, constitué d'un matériau réfractaire éventuellement entouré d'une armature métallique , monté dans une cadre métallique muni d'une paroi de fond et de butées latérales contre lesquelles prend appui au moins un élément d'usure .The present invention relates to a device for clamping a wear element of a sliding closure of a metallurgical container intended for controlling the flow rate of molten metal, consisting of a refractory material possibly surrounded by a metal frame, mounted in a metal frame provided with a bottom wall and lateral stops against which bears at least one wear element.

Les éléments d'usure essentiellement une busette interne assurant la liaison entre le conteneur métallurgique et la fermeture coulissante, une plaque fixe supérieure percée d'au moins un orifice en regard de la busette interne, une plaque coulissante munie d'au moins un orifice glissant jointivement contre la plaque fixe, éventuellement une plaque fixe inférieure et une busette collectrice.The wear elements essentially an internal nozzle ensuring the connection between the metallurgical container and the sliding closure, an upper fixed plate pierced with at least one orifice opposite the internal nozzle, a sliding plate provided with at least one sliding orifice joined against the fixed plate, possibly a lower fixed plate and a collecting nozzle.

Ces éléments d'usure sont réalisés en matériau réfractaire entouré au moins partiellement, d'une chemise formant coffrage perdu. Ces éléments munis de leur armature métallique sont montés à serrage dans un cadre-support.These wear elements are made of refractory material surrounded at least partially by a jacket forming a lost formwork. These elements provided with their metal frame are clamped in a support frame.

Par le brevet belge n° 876.353 on connaît un obturateur coulissant pour coulée continue dans lequel la plaque de fond montée à serrage à l'aide d'au moins un excentrique, est susceptible d'exercer sur la che- mise métallique de la plaque de fond des efforts de serrage orientés tant dans le sens longitudinal que dans le sens transversal, en vue de maintenir l'élément d'usure dans le cadre de support.By Belgian Patent No. 876.353 there is known a sliding shutter for continuous casting in which the bottom plate mounted clamping with at least one eccentric, is capable of exerting on the metal sleeve of the plate bottom of clamping forces oriented both in the longitudinal direction and in the transverse direction, in order to maintain the wear element in the support frame.

La suppression des jeux mécaniques parallèlement au mouvement de la plaque mobile est obtenue par pincement de la plaque. Or, en raison des vibrations et des coefficients de dilatation thermique différents entre le matériau réfractaire et le cadre, l'effet de pincement peut s'altérer au cours de la coulée et même disparaître.The elimination of mechanical play parallel to the movement of the movable plate is obtained by pinching the plate. However, due to the different vibrations and coefficients of thermal expansion between the refractory material and the frame, the pinching effect can deteriorate during casting and even disappear.

Il en résulte notamment qu'à l'ouverture de la fermeture coulissante la plaque ainsi relâchée tombe de son cadre métallique, constituant alors une source de danger pour les opérateurs.As a result, in particular, when the sliding closure opens, the plate thus released falls from its metal frame, thus constituting a source of danger for operators.

D'autre part, les plaques doivent généralement être appliquées contre un fond ménagé dans le cadre métallique associé. Les dispositifs connus ne prévoient pas de pousser la plaque contre le fond du cadre, opération généralement effectué manuellement ou par pressage lors de la fermeture coulissante. Ce procédé présente le double danger d'introduire un facteur humain et de temporiser cette action de mise en place au-delà du temps de fritage des coulis assurant les joints.On the other hand, the plates must generally be applied against a bottom formed in the associated metal frame. Known devices do not provide for pushing the plate against the bottom of the frame, an operation generally carried out manually or by pressing during the sliding closure. This process presents the double danger of introducing a human factor and of delaying this setting up action beyond the time of sintering of the grouts ensuring the joints.

Enfin, les dispositifs existants font appel de par leur conception à des éléments de visserie qui aux conditions thermiques de travail très difficiles posent des problèmes de démontage et d'entretien.Finally, the existing devices call by their design for fasteners which under very difficult thermal working conditions pose disassembly and maintenance problems.

La présente invention vise à remédier aux inconvénients précédemment décrits et propose un dispositif qui permet d'assurer simultanément le serrage de la plaque contre le fond du cadre, la résorbtion des jeux entre la plaque et les arrêts latéraux et le coinçage de la plaque dans le cadre, tout en évitant d'utiliser des éléments de visserie.The present invention aims to remedy the drawbacks described above and proposes a device which makes it possible simultaneously to clamp the plate against the bottom of the frame, to absorb the clearances between the plate and the lateral stops and to wedge the plate in the frame, while avoiding the use of fasteners.

Elle concerne un dispositif de fermeture coulissante pour un conteneur métallurgique, en particulier un répartiteur contenant un bain métallique, essentiellement caractérisé en ce qu'il est constitué d'un organe rotatif entraînant en rotation une came présentant une face inclinée qui repousse une face d'un élément d'usure en s'appuyant sur un rebord sensiblement parallèle du cadre en regard du fond de celui-ci de manière à assurer simultanément le pressage de la plaque munie éventuellement d'une armature contre le fond du cadre, le serrage de la plaque contre les arrêts latéraux et le coinçage de la plaque dans le cadre.It relates to a sliding closure device for a metallurgical container, in particular a distributor containing a metal bath, essentially characterized in that it consists of a rotary member driving in rotation a cam having an inclined face which repels a face of a wear element based on a substantially parallel flange of the frame opposite the bottom thereof so as to simultaneously press the plate possibly provided with a frame against the bottom of the frame, the clamping of the plate against the lateral stops and the wedging of the plate in the frame .

Suivant une particularité de l'invention, le dispositif de serrage présente à chaque extrémité de la partie centrale de l'organe rotatif formant came deux axes-pivots coaxiaux.According to a feature of the invention, the clamping device has at each end of the central part of the rotary member forming a cam two coaxial pivot axes.

Dans une forme de réalisation particulière de l'invention, le dispositif est monté dans un logement délimité par le cadre, dans les parois sont ménagés deux orifices cylindriques circulaires coaxiaux sur un axe perpendiculaire au fond du cadre, le grand orifice éventuellement ouvert du côté du fond du cadre étant destiné à recevoir le grand axe-pivot auquel il tient lieu de palier de rotation, le petit orifice situé du côté opposé par le rapport au fond du cadre possédant un diamètre légèrement supérieur à celui du petit axe pivot auquel il tient lieu de palier de rotation , la paroi de fond du logement perpendiculaire à l'axe de rotation du verrou rotatif étant déterminé en vue de servir de butée axiale à la face d'appui du verrou rotatif.In a particular embodiment of the invention, the device is mounted in a housing delimited by the frame, in the walls are formed two circular cylindrical orifices coaxial on an axis perpendicular to the bottom of the frame, the large orifice possibly open on the side of the bottom of the frame being intended to receive the large pivot axis to which it serves as a rotation bearing, the small orifice situated on the opposite side with respect to the bottom of the frame having a diameter slightly greater than that of the small pivot axis to which it takes place rotation bearing, the bottom wall of the housing perpendicular to the axis of rotation of the rotary lock being determined with a view to serving as an axial stop for the bearing face of the rotary lock.

La came a avantageusement la forme d'une hélice coaxiale avec les axes pivots, un méplat étant ménagé sur le cylindre générateur de l'hélice en vue de permettre l'introduction de la plaque dans le cadre lorsque le méplat est amené en regard de la plaque.The cam advantageously has the shape of a helix coaxial with the pivot axes, a flat being formed on the generator cylinder of the propeller in order to allow the introduction of the plate into the frame when the flat is brought opposite the plate.

La forme préférée est celle d'une hélice d'axe parallèle à l'axe de rotation du verrou rotatif, l'axe de l'hélice étant excentré par rapport à l'axe de rotation du verrou rotatif.The preferred form is that of a helix with an axis parallel to the axis of rotation of the rotary bolt, the axis of the propeller being eccentric relative to the axis of rotation of the rotary lock.

Si cela s'avère nécessaire, le dispositif peut comprendre plusieurs dispositifs de serrage répartis sur le pourtour de la plaque.If necessary, the device can include several clamping devices distributed around the periphery of the plate.

D'autres particularités et détails de l'invention apparaîtront au cours de la description détaillée ci- jointe d'une forme de réalisation particulière de l'invention, en faisant références aux dessins suivants, dans lesquels :

  • - la figure 1 est une vue schématique en plan d'une fermeture coulissante ;
  • - la figure 2 est une vue en coupe faite selon la section II-II de la figure 1, de manière à montrer le dispositif de serrage suivant l'invention ;
  • - la figure 3 est une coupe analogue à celle de la figure 2, d'une seconde forme de réalisation du dispositif de serrage suivant l'invention ;
  • - la figure 4 est une vue analogue à celles des figures 2 et 3, d'une troisième forme de réalisation du dispositif de serrage.
  • - la figure 5 illustre à grande échelle un organe rotatif.
Other particularities and details of the invention will become apparent during the attached detailed description of a particular embodiment of the invention, with reference to the following drawings, in which:
  • - Figure 1 is a schematic plan view of a sliding closure;
  • - Figure 2 is a sectional view taken along section II-II of Figure 1, so as to show the clamping device according to the invention;
  • - Figure 3 is a section similar to that of Figure 2, of a second embodiment of the clamping device according to the invention;
  • - Figure 4 is a view similar to those of Figures 2 and 3, of a third embodiment of the clamping device.
  • - Figure 5 illustrates on a large scale a rotary member.

Dans les dessins, les mêmes notations de référence désignent des éléments identiques ou analogues.In the drawings, the same reference notations designate identical or analogous elements.

La vue schématique en plan de la figure 1 montre un cadre métallique, désigné dans son ensemble par la notation de référence 1. Ce cadre comporte une paroi de fond 2 et des rebord latéraux 3. Il enserre un élément d'usure 4 d'une fermeture coulissante pour conteneur métallurgique. L'élément d'usure est habituellement une plaque en matériau réfractaire éventuellement entouré d'une chemise métallique 5. Le rebord latéral 3 du cadre 1 est constitué d'une cornière repliée à angle droit destinée à renforcer la rigidité du cadre. Au voisinage de coins opposés, sont prévues des cavités destinés à accueillir chacun un dispositif de serrage 6.The schematic plan view of FIG. 1 shows a metal frame, generally designated by the reference notation 1. This frame has a bottom wall 2 and lateral flanges 3. It encloses a wear element 4 of a sliding closure for metallurgical container. The wear element is usually a plate of refractory material possibly surrounded by a metal jacket 5. The lateral flange 3 of the frame 1 consists of an angle folded at a right angle intended to reinforce the rigidity of the frame. In the vicinity of opposite corners, there are provided cavities intended to each accommodate a clamping device 6.

Comme illustré à la figure 2, le dispositif de serrage 6 comprend un organe rotatif comportant :

  • - une partie centrale dite came 7 présentant une face inclinée 7' en regard du fond 2 du cadre 1, de part et d'autre de la came 7, deux axes pivots 8, 9 coaxiaux de diamètre différent. Au fond 2 du -cadre 1, un axe-pivot 8 présentant un diamètre supérieur ou égal au plus grand diamètre de la came 7, s'appuie dans un orifice 10 prévu dans le fond 2 du cadre 1. Un axe-pivot 9 situé du côté opposé au fond 2 du cadre 2 présente un diamètre inférieur ou égal au plus petit diamètre de la came 7. Une face d'appui 11 perpendiculaire à l'axe de rotation est ménagée au dos de la came 7, en regard du petit axe-pivot 9.
    L'organe rotatif 6 ainsi incorporé dans un logement 6' délimité par au moins une paroi 2 du cadre 1 et un rebord des parois latérales.
  • Le grand orifice 10 est ouvert du côté du fond 2 du cadre 1 et présente un diamètre légèrement supérieur au diamètre du grand axe-pivot 8 de manière à lui servir de palier de rotation et à permettre la mise en place du verrou rotatif 6 dans le logement 6'.
    Un petit orifice 12 situé du côté opposé du fond 2 du cadre 1, dans le prolongement du premier présente un diamètre légèrement supérieur au diamètre du petit axe-pivot 9 de manière à lui servir de palier de rotation.
    La paroi de fond 15 du logement 6', perpendiculaire à l'axe de rotation sert de butée longitudinale à la face d'appui 11 du verrou rotatif 6.
  • La surface d'appui 13 ménagée dans la plaque 1 est caractérisée par le fait qu'elle comporte au moins une face inclinée en regard au côté du cadre 1 opposé au fond 2.
  • Un dispositif de verrouillage 14 permet d'éviter que l'organe rotatif 6 ne puisse sortir du logement 8 après sa mise en place tout en permettant sa rotation. Il peut être constitué de tout dispositif adéquat tel que par exemple les dispositifs connus sous le nom de circlip ou de goupille,
As illustrated in FIG. 2, the clamping device 6 comprises a rotary member comprising:
  • - A central part called cam 7 having an inclined face 7 'facing the bottom 2 of the frame 1, on either side of the cam 7, two pivot axes 8, 9 coaxial with different diameters. At the bottom 2 of the frame 1, a pivot axis 8 having a diameter greater than or equal to the largest diameter of the cam 7, is supported in an orifice 10 provided in the bottom 2 of the frame 1. A pivot axis 9 located on the side opposite the bottom 2 of the frame 2 has a diameter less than or equal to the smallest diameter of the cam 7. A bearing face 11 perpendicular to the axis of rotation is formed on the back of the cam 7, look of the small pivot axis 9.
    The rotary member 6 thus incorporated in a housing 6 'delimited by at least one wall 2 of the frame 1 and a flange of the side walls.
  • The large orifice 10 is open on the bottom side 2 of the frame 1 and has a diameter slightly greater than the diameter of the large pivot axis 8 so as to serve as a rotation bearing and to allow the setting of the rotary lock 6 in the housing 6 '.
    A small orifice 12 located on the opposite side of the bottom 2 of the frame 1, in the extension of the first has a diameter slightly greater than the diameter of the small pivot axis 9 so as to serve as a bearing for rotation.
    The bottom wall 15 of the housing 6 ', perpendicular to the axis of rotation serves as a longitudinal stop for the bearing face 11 of the rotary bolt 6.
  • The bearing surface 13 formed in the plate 1 is characterized in that it comprises at least one inclined face facing the side of the frame 1 opposite the bottom 2.
  • A locking device 14 makes it possible to prevent the rotary member 6 from being able to come out of the housing 8 after its installation while allowing it to rotate. It can consist of any suitable device such as, for example, devices known as a circlip or a pin,

En position de service, l'élément d'usure constitué d'une plaque 4 est serrée dans le cadre 1 par le verrou rotatif 3. La fermeture coulissante se présente alors sous la forme d'un ensemble de pièces imbriquées les unes dans les autres et coincées par un organe rotatif verrouillant la plaque entre la face inclinée de la came 7 et le fond 2 du cadre 1. Réciproquement la plaque 4 coince le verrou rotatif entre la face inclinée parallèle de la surface d'appui 16 de la plaque et le fond 15 du logement 6'. Un tel dispositif permet d'éviter que même si un léger déserrage advient du fait des vibrations ou des dilatations différentielles des différentes pièces , la plaque puisse se désolidariser du cadre 1, notamment à l'ouverture de la fermeture coulissante. L'encombrement du dispositif de serrage est très réduit tant en épaisseur qu'en diamètre ce qui permet de le loger facilement dans les dispositifs existants. Pour réaliser les objectifs de serrage précédemment décrits, le verrou rotatif 6 doit exercer sur la surface d'appui 13 de la plaque 1 des efforts dirigés simultanément vers le fond 2 du cadre 2 et vers le centre de la plaque 4. Suivant l'invention deux effets peuvent être utilisés indépendamment ou en association pour obtenir ce résultat. Suivant une variante de l'invention illustrée par les figures 1 et 3 la came 7 a la forme d'une hélice coaxiale aux axes pivots 8,9. La rotation du verrou rotatif 3 entraîne un mouvement du lieu de contact de la came 7 avec la surface d'appui 13 vers le fond 12 du cadre parallèlement à l'axe de ' rotation du verrou rotatif 6.In the service position, the wear element consisting of a plate 4 is tightened in frame 1 by the rotary lock 3. The sliding closure is then in the form of a set of parts nested one inside the other. and wedged by a rotary member locking the plate between the inclined face of the cam 7 and the bottom 2 of the frame 1. Conversely, the plate 4 wedges the rotary lock between the parallel inclined face of the bearing surface 16 of the plate and the bottom 15 of housing 6 '. Such a device makes it possible to avoid that even if a slight loosening occurs due to the vibrations or differential expansions of the different parts, the plate can become detached from the frame 1, in particular at the opening of the sliding closure. The size of the clamping device is very reduced both in thickness and in diameter, which makes it easy to accommodate it in existing devices. To achieve the tightening objectives described above, the rotary bolt 6 must exert on the bearing surface 13 of the plate 1 forces directed simultaneously towards the bottom 2 of the frame 2 and towards the center of the plate 4. According to the invention two effects can be used independently or in combination to achieve this result. According to a variant of the invention illustrated by FIGS. 1 and 3, the cam 7 has the shape of a helix coaxial with the pivot axes 8, 9. The rotation of the rotary lock 3 causes a movement of the place of contact of the cam 7 with the bearing surface 13 towards the bottom 12 of the frame parallel to the axis of rotation of the rotary lock 6.

L'inclinaison des faces de contact des cames 7 et surface d'appui 13 garantit le double serrage vers le fond 2 du cadre et vers le centre de la plaque. Un méplat 17 doit être ménagé sur le cylindre générateur 18 de l'hélice pour permettre la mise en place de la plaque 1 dans le cadre 2.The inclination of the contact faces of the cams 7 and bearing surface 13 guarantees double tightening towards the bottom 2 of the frame and towards the center of the plate. A flat 17 must be made on the generator cylinder 18 of the propeller to allow the positioning of the plate 1 in the frame 2.

L'absence totale de visserie garantit que même dans les conditions de température de fonctionnement les plus extrêmes, les opérations de montage et de démontage resteront aisées. L'introduction du verrou rotatif 6 par le fond 2 du cadre 1 jusqu'à butée sur le fond 15 du logement 6' permet d'éviter, même en cas d'avarie, tout débordement du verrou rotatif 3 du côté de la plaque 4. Un tel débordement entraînerait des conséquences catastrophiques pour les parties de la fermeture coulissante située en regard de la plaque 4.The complete absence of hardware guarantees that even under the most extreme operating temperature conditions, assembly and disassembly operations will remain easy. The introduction of the rotary lock 6 through the bottom 2 of the frame 1 until it stops on the bottom 15 of the housing 6 'makes it possible to avoid, even in the event of damage, any overflow of the rotary lock 3 on the side of the plate 4 Such an overflow would have catastrophic consequences for the parts of the sliding closure located opposite the plate 4.

La rotation du verrou rotatif 6 entraîne-le déplacement du lieu de contact de la came 7 et de la surface d'appui 13 vers le centre de la plaque. Le pressage l'une contre l'autre suivant des faces inclinées de contact, de la came 7 et de l'armature 5 garantit le double serrage vers le fond 2 du cadre 2 et vers le centre de la plaque.The rotation of the rotary bolt 6 causes the displacement of the contact point of the cam 7 and of the bearing surface 13 towards the center of the plate. Pressing one against the other along inclined contact faces, of the cam 7 and of the frame 5 guarantees double tightening towards the bottom 2 of the frame 2 and towards the center of the plate.

Suivant une forme préférée de l'invention illustrée par la figure 3, la came 7 présente la forme d'une hélice dont l'axe est parallèle mais légèrement excentré par rapport à l'axe de rotation du verrou rotatif 3. Ce dispositif utilise en association les deux effets d'hélice et d'excentrique préalablement décrits.According to a preferred form of the invention illustrated by FIG. 3, the cam 7 has the shape of a propeller whose axis is parallel but slightly eccentric relative to the axis of rotation of the rotary bolt 3. This device uses in combination the two propeller and eccentric effects previously described.

Le nouveau dispositif de fermeture procure des avantages notables au niveau de la robustesse, du coût de réalisation, de l'encombrement et de la fiabilité. En particulier le verrou rotatif est massif et peut avantageusement être fabriqué d'une seule pièce à partir du métal coulé.The new closure device provides significant advantages in terms of robustness, production cost, size and reliability. In particular the rotary lock is massive and can advantageously be made in one piece from the cast metal.

La figure 1 montre deux dispositifs de serrage 6 disposés dans le cadre 2, de manière diamétralement opposée par rapport à la plaque suivant une direction écartée de moins de 30° par rapport à l'axe du mouvement de la fermeture coulissante. Un tel dispositif permet de serrer uniformément la plaque 4 contre le fond 2 du cadre 1.Figure 1 shows two clamping devices 6 arranged in the frame 2, diametrically opposite with respect to the plate in a direction spaced less than 30 ° from the axis of the movement of the sliding closure. Such a device makes it possible to uniformly tighten the plate 4 against the bottom 2 of the frame 1.

Il est évident que l'invention n'est pas exclusivement limitée aux modes et formes de. réalisation représentés et que bien des modifications peuvent être apportées dans la forme, la disposition et la constitution de certains des éléments intervenant dans sa réalisation à condition que ces modifications ne soient pas en contradiction avec l'objet des revendications suivantes.It is obvious that the invention is not exclusively limited to the modes and forms of. represented and that many modifications can be made in the form, arrangement and constitution of some of the elements involved in its realization provided that these modifications are not in contradiction with the subject of the following claims.

Ainsi la surface d'appui 13 peut être ménagée sur toute autre partie de la plaque 4 et présenter des formes diverses à condition de posséder une face inclinée en regard du côté opposé au fond 2 du cadre 1.Thus the bearing surface 13 can be provided on any other part of the plate 4 and have various shapes provided that it has an inclined face opposite the side opposite the bottom 2 of the frame 1.

En lieu et place d'un dispositif 16 préférentiellement disposé dans le petit axe-pivot 9 , conformé en vue de l'engagement d'un outil destiné à produire la rotation, on peut prévoir un dispositif similaire dans le grand axe-pivot 8, en particulier dans le cas où l'accessibilité du côté du fond du cadre s'avère plus avantageuse.In place of a device 16 preferably arranged in the small pivot axis 9, shaped for the engagement of a tool intended to produce the rotation, a similar device can be provided in the large pivot axis 8, in particular in the case where accessibility on the bottom side of the frame proves more advantageous.

Suivant une variante de l'invention illustrée à titre d'exemple par la figure 3, le grand axe-pivot 8 est muni d'une poignée en vue de produire la rotation.According to a variant of the invention illustrated by way of example in FIG. 3, the large pivot axis 8 is provided with a handle in order to produce rotation.

Des poignées similaires peuvent être rapportées sur le petit axe-pivot 9 pourvu qu'elles ne présentent pas d'interaction avec les parties en regard de la plaque 4 lors des manoeuvres de la fermeture coulissante.Similar handles can be attached to the small pivot axis 9 provided that they do not have any interaction with the opposite parts of the plate 4 during the operations of the sliding closure.

Claims (13)

1. Dispositif de serrage (6) d'un élément d'usure (4) d'une fermeture coulissante de conteneur métallurgique destinée au contrôle du débit de métal fondu, constitué d'un matériau réfractaire éventuellement entouré d'une armature métallique (9), monté dans un cadre métallique (1) muni d'une paroi de fond (2) et de butées latérales (3) contre lesquelles prend appui au moins un élément d'usure (4); caractérisé en ce qu'il est constitué d'un organe rotatif (6) entraînant en rotation une came (7) présentant une face inclinée qui repousse une face d'un élément d'usure en s'appuyant sur un rebord sensiblement parallèle du cadre (1) en regard du fond de celui-ci, de manière à assurer simultanément le pressage de la plaque (4) munie éventuellement d'une armature, contre le fond (2) du cadre (1), le serrage de la plaque contre les arrêts (3) et le coinçage de la plaque (4) dans le cadre (1).1. Clamping device (6) of a wear element (4) of a sliding closure of a metallurgical container intended for controlling the flow of molten metal, consisting of a refractory material possibly surrounded by a metal frame (9 ), mounted in a metal frame (1) provided with a bottom wall (2) and lateral stops (3) against which bears at least one wear element (4); characterized in that it consists of a rotary member (6) driving in rotation a cam (7) having an inclined face which pushes back one face of a wear element by pressing on a substantially parallel edge of the frame (1) facing the bottom thereof, so as to simultaneously press the plate (4) possibly provided with a frame, against the bottom (2) of the frame (1), the clamping of the plate against the stops (3) and the wedging of the plate (4) in the frame (1). 2. Dispositif suivant la revendication 1, caractérisé en ce qu'il présente à chaque extrémité de la partie centrale de l'organe rotatif (6) formant came, deux axes-pivots (8,9) coaxiaux.2. Device according to claim 1, characterized in that it has at each end of the central part of the rotary member (6) forming a cam, two coaxial pivot axes (8,9). 3. Dispositif suivant l'une quelconque des revendications 1 ou 2, caractérisé en ce que le pivot destiné à être disposé dans le fond du cadre (1) présente un diamètre au moins égal à la plus grande excentricité de la came (7).3. Device according to any one of claims 1 or 2, characterized in that the pivot intended to be disposed in the bottom of the frame (1) has a diameter at least equal to the greatest eccentricity of the cam (7). 4. Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le pivot (8) destiné à être disposé du côté opposé au fond étant au plus supérieur à la plus petite excentricité de la came (7)4. Device according to any one of claims 1 to 3, characterized in that the pivot (8) intended to be disposed on the side opposite the bottom being at most greater than the smallest eccentricity of the cam (7) 5. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'il est monté dans un logement (8) délimité par le cadre, dans les parois duquel sont ménagés deux orifices cylindriques circulaires coaxiaux sur un axe perpendiculaire au fond (2) du cadre (1), le grand orifice (10) étant éventuellement ouvert du côté du fond (2) du cadre (1) étant destiné à recevoir le grand axe-pivot (8) auquel il tient lieu de palier de rotation, le petit orifice (10) situé du côté opposé par rapport au fond (2) du cadre (1) possédant un diamètre légèrement supérieur à celui du petit axe-pivot (9) auquel il tient lieu de palier de rotation de la paroi de fond (15) du logement (6') perpendiculaire à l'axe de rotation du verrou rotatif (6) étant déterminé en vue de servir de butée axiale à la face d'appui (11) du verrou rotatif (8).5. Device according to any one of the preceding claims, characterized in that it is mounted in a housing (8) delimited by the frame, in the walls of which are formed two circular coaxial cylindrical orifices on an axis perpendicular to the bottom (2 ) of the frame (1), the large orifice (10) being possibly open on the side of the bottom (2) of the frame (1) being intended to receive the large pivot axis (8) to which it acts as a rotation bearing, the small orifice (10) located on the opposite side with respect to the bottom (2) of the frame (1) having a diameter slightly greater than that of the small pivot axis (9) to which it acts as the bearing for rotation of the bottom wall ( 15) of the housing (6 ') perpendicular to the axis of rotation of the rotary lock (6) being determined in order to serve as an axial stop for the bearing face (11) of the rotary lock (8). 6. Dispositif suivant l'une quelconque des revendications précédentes caractérisé par le fait que la came (7) a la forme d'une hélice coaxiale avec les axes-pivots (8,9), un méplat (17) étant ménagé sur le cylindre générateur (18) de l'hélice en vue de permettre l'introduction de la plaque (4) dans le cadre (1) lorsque le méplat (17) est amené en regard de la plaque (4).6. Device according to any one of the preceding claims, characterized in that the cam (7) has the shape of a helix coaxial with the pivot axes (8, 9), a flat (17) being formed on the cylinder propeller generator (18) in order to allow the introduction of the plate (4) in the frame (1) when the flat (17) is brought opposite the plate (4). 7. Dispositif suivant la revendication 2, caractérisé par le fait que la came (7) présente la forme d'une hélice d'axe parallèle à l'axe de rotation du verrou rotatif (6), l'axe de l'hélice étant excentré par rapport à l'axe de rotation du verrou rotatif (6).7. Device according to claim 2, characterized in that the cam (7) has the shape of a helix with an axis parallel to the axis of rotation of the rotary bolt (6), the axis of the propeller being eccentric with respect to the axis of rotation of the rotary bolt (6). 8. Dispositif suivant l'une quelconque des revendications, précédentes caractérisé par le fait qu'une gorge est ménagée dans le grand orifice (10) du logement (6')en vue d'introduire un circlip de verrouillage (11) de l'organe rotatif (8) dans le logement (6).8. Device according to any one of the preceding claims, characterized in that a groove is formed in the large orifice (10) of the housing (6 ') in order to introduce a locking circlip (11) of the rotary member (8) in the housing (6). 9. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par le fait que l'un des axes-pivots (8,9) au moins est conformé en vue de l'engagement d'un outil destiné à produire la rotation de l'organe rotatif (6).9. Device according to any one of the preceding claims, characterized in that at least one of the pivot axes (8, 9) is shaped for the engagement of a tool intended to produce the rotation of the 'rotary member (6). 10. Dispositif suivant l'une quelconque des revendications 1 à 8, caractérisé par le fait que l'un des axes-pivots (8,9) au moins comporte une poignée (19) destinée à produire la rotation.10. Device according to any one of claims 1 to 8, characterized in that one of the pivot axes (8,9) at least comprises a handle (19) intended to produce the rotation. 11. Dispositif suivant l'une quelconque des revendications précédentes ,caractérisé par le fait qu'au moins deux dispositifs de serrage (6) sont déposés de manière diamétralement opposée par rapport à la plaque (4) suivant une direction écartée de moins de 30' par rapport à l'axe mouvement de la fermeture coulissante.11. Device according to any one of the preceding claims, characterized in that at least two clamping devices (6) are deposited diametrically opposite with respect to the plate (4) in a direction spaced less than 30 'from the movement axis of the sliding closure. 12. Dispositif suivant l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend plusieurs dispositifs de serrage (6) répartis sur le pourtour de la plaque (4).12. Device according to any one of claims 1 to 7, characterized in that it comprises several clamping devices (6) distributed around the periphery of the plate (4). 13. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé par le fait que l'organe rotatif (6) est constitué d'une pièce monobloc en métal coulé.13. Device according to any one of the preceding claims, characterized in that the rotary member (6) consists of a single piece of cast metal.
EP86870035A 1985-03-15 1986-03-13 Installation for clamping a wear element in a slide gate nozzle for a metallurgical container Expired - Lifetime EP0194990B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/214655A BE901948A (en) 1985-03-15 1985-03-15 DEVICE FOR TIGHTENING A WEAR ELEMENT OF A SLIDING CLOSURE OF A METALLURGICAL CONTAINER.
BE214655 1985-03-15

Publications (3)

Publication Number Publication Date
EP0194990A2 true EP0194990A2 (en) 1986-09-17
EP0194990A3 EP0194990A3 (en) 1987-05-20
EP0194990B1 EP0194990B1 (en) 1990-10-03

Family

ID=3843863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86870035A Expired - Lifetime EP0194990B1 (en) 1985-03-15 1986-03-13 Installation for clamping a wear element in a slide gate nozzle for a metallurgical container

Country Status (5)

Country Link
US (1) US4687186A (en)
EP (1) EP0194990B1 (en)
BE (1) BE901948A (en)
DE (1) DE3674608D1 (en)
ES (1) ES8701558A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1001580A3 (en) * 1987-08-26 1989-12-12 Shinagawa Refractories Co APPARATUS FOR LOCKING AND FIXING A REFRACTORY PLATE FOR A VALVE DISTRIBUTION VALVE FOR CONTROLLING THE FLOW OF MOLTEN STEEL.
TR24929A (en) * 1991-03-11 1992-07-01 Cerafer Sarl LIDING PLATE OF LIDED LIDS FOR METALLURGICAL ENCLOSURES
EP0498915A1 (en) * 1990-01-30 1992-08-19 Cerafer S.A.R.L. Sliding plate for sliding gate closures on metallurgical vessels
FR2740368A1 (en) * 1995-10-27 1997-04-30 Vesuvius France Sa METHOD FOR REUSE OF DRAWER CLOSURE PLATES AND PLATE FOR SAID CLOSURE
WO1998042461A1 (en) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Arrangement in foundry equipment comprising e.g. a moulding mac hine and a conveyor for 'green' sand moulds

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0222070A1 (en) * 1985-10-30 1987-05-20 Didier S.A. Device for the frameworks of refractory plates in sliding gate valves
US5139237A (en) * 1988-01-15 1992-08-18 Stopinc Ag Metal member with annular centering surface
CH675976A5 (en) * 1988-01-15 1990-11-30 Stopinc Ag
BE1005987A3 (en) * 1992-06-16 1994-04-12 Int Ind Eng Sa Control device of casting speed.
ATE193236T1 (en) * 1996-08-05 2000-06-15 Stopinc Ag FIREPROOF PLATE AND A CLAMPING DEVICE FOR A SLIDING CLOSURE ON THE SPOUT OF A CONTAINER CONTAINING MOLTEN METAL
WO2002090017A1 (en) * 2001-05-01 2002-11-14 Krosakiharima Corporation Sliding nozzle unit
CH710094A2 (en) * 2014-09-11 2016-03-15 Refractory Intellectual Prop Sliding gate valve for a metallurgical vessel.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100833A3 (en) * 1970-06-27 1972-03-24 Interstop Ag
DE2732094A1 (en) * 1977-07-15 1979-01-18 Didier Werke Ag SLIDING CLOSURE FOR VESSELS CONTAINING METAL MELT
FR2528741A1 (en) * 1982-06-22 1983-12-23 Didier Werke Ag APPARATUS FOR CLAMPING A CLOSURE PLATE ON A SLIDING CLOSURE OF A CASTING ORIFICE ON A RESERVOIR CONTAINING A FUSION BATH

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821839B2 (en) * 1978-05-19 1981-04-16 Stopine AG, Zug Slide closure for the pouring of molten metal containing containers
DE8013402U1 (en) * 1980-05-17 1980-08-21 Martin & Pagenstecher Gmbh, 5000 Koeln SLIDE PLATE FOR SLIDE LOCKS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100833A3 (en) * 1970-06-27 1972-03-24 Interstop Ag
DE2732094A1 (en) * 1977-07-15 1979-01-18 Didier Werke Ag SLIDING CLOSURE FOR VESSELS CONTAINING METAL MELT
FR2528741A1 (en) * 1982-06-22 1983-12-23 Didier Werke Ag APPARATUS FOR CLAMPING A CLOSURE PLATE ON A SLIDING CLOSURE OF A CASTING ORIFICE ON A RESERVOIR CONTAINING A FUSION BATH

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1001580A3 (en) * 1987-08-26 1989-12-12 Shinagawa Refractories Co APPARATUS FOR LOCKING AND FIXING A REFRACTORY PLATE FOR A VALVE DISTRIBUTION VALVE FOR CONTROLLING THE FLOW OF MOLTEN STEEL.
EP0498915A1 (en) * 1990-01-30 1992-08-19 Cerafer S.A.R.L. Sliding plate for sliding gate closures on metallurgical vessels
TR24929A (en) * 1991-03-11 1992-07-01 Cerafer Sarl LIDING PLATE OF LIDED LIDS FOR METALLURGICAL ENCLOSURES
FR2740368A1 (en) * 1995-10-27 1997-04-30 Vesuvius France Sa METHOD FOR REUSE OF DRAWER CLOSURE PLATES AND PLATE FOR SAID CLOSURE
WO1997015410A1 (en) * 1995-10-27 1997-05-01 Vesuvius France S.A. Process for reusing slide gate plates and plate for this closure
EP1103326A1 (en) * 1995-10-27 2001-05-30 Vesuvius France (S.A.) Plate for slide gate
WO1998042461A1 (en) * 1997-03-26 1998-10-01 Georg Fischer Disa A/S Arrangement in foundry equipment comprising e.g. a moulding mac hine and a conveyor for 'green' sand moulds

Also Published As

Publication number Publication date
EP0194990A3 (en) 1987-05-20
BE901948A (en) 1985-09-16
ES552906A0 (en) 1986-12-16
ES8701558A1 (en) 1986-12-16
DE3674608D1 (en) 1990-11-08
EP0194990B1 (en) 1990-10-03
US4687186A (en) 1987-08-18

Similar Documents

Publication Publication Date Title
EP0194990B1 (en) Installation for clamping a wear element in a slide gate nozzle for a metallurgical container
LU85957A1 (en) REFRACTORY PLATE AND CASTING NOZZLE, AND METHOD FOR MOUNTING REFRACTORY PLATES IN A SLIDING VALVE
WO2006114538A1 (en) Method and device for connecting a wear part to the support thereof on material-handling devices on heavy-construction machinery
EP1662052B1 (en) Apparatus for locking a cover on a frame
CA2438350C (en) Device for detachable connection between two elements
FR2756854A1 (en) DEVICE AND METHOD FOR HOLDING A GRADER BLADE
FR2640336A1 (en) Rapid nut
EP0611715B1 (en) Bearing for supporting one and of a winding bar for winding or unwinding webs of material
EP2344390A1 (en) Tooling with articulated components, equipped with a locking device
EP0612887B1 (en) Pivoted gate
EP0469939A2 (en) Device for connecting two articles with several attachment points
FR2468463A1 (en) DEVICE FOR LOCKING PLATE PLATES ON PRINTING MACHINE
FR2699583A1 (en) Funeral vault door lock
FR2908442A1 (en) Edge fitting for e.g. door, has fixation unit with stop movable for fixing mounting plate on edge of opening for being displaced from free position towards locked position in which stop is housed and wedged between plate and stopper
FR2944542A1 (en) Support stud for e.g. boat cradle, to support wall in construction industry, has blocking units blocking rotation of cam in raised position, and external tube including bearing surface on which active surface is supported
FR2809473A1 (en) Wall mounting for shelf has base plate with fixed jaw and movable support with opposing jaw to grip shelf panel
FR3113559A3 (en) Extension adjuster for tackle box and extension adjuster for foot tube
FR2607536A1 (en) Device for attaching a pair of formwork panels shuttering the same face of a wall and with which panels the complementary parts of this device are associated and formwork panels provided with the complementary parts of at least one such device
FR2461799A1 (en) Invisible strong box hinge - is inaccessible from outside and requires minimal play between wall and door due to recessed fitting
FR2590613A1 (en) Device for fixing a mould, particularly a timber or metal mould, to a magnetic fixing part equipped with a strong magnet, intended to be fixed to a metal surface
EP0839610A1 (en) Clamping device
BE888583A (en) REMOVABLE TOOTH FOR EXCAVATOR,
EP1144931A1 (en) Furnace for melting solid waste with cooling water boxes
BE1003723A3 (en) Cover of a continuous casting distributor
EP0420778B1 (en) Apparatus for capping a manhole

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: A2

Designated state(s): DE FR GB IT LU NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT LU NL

17P Request for examination filed

Effective date: 19870627

17Q First examination report despatched

Effective date: 19881012

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT LU NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3674608

Country of ref document: DE

Date of ref document: 19901108

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940210

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940224

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19940228

Year of fee payment: 9

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19940331

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19950313

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19951001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19951130

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19951001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19951201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960228

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19970313

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970313

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: 20050313