EP0666324B1 - Dispositif pour l'accouplement d'un chariot métallurgique à une conduite flexible - Google Patents
Dispositif pour l'accouplement d'un chariot métallurgique à une conduite flexible Download PDFInfo
- Publication number
- EP0666324B1 EP0666324B1 EP95100345A EP95100345A EP0666324B1 EP 0666324 B1 EP0666324 B1 EP 0666324B1 EP 95100345 A EP95100345 A EP 95100345A EP 95100345 A EP95100345 A EP 95100345A EP 0666324 B1 EP0666324 B1 EP 0666324B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling
- carriage
- metallurgical
- pair
- station
- 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.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
Definitions
- the present invention relates to a device for coupling a metallurgical carriage to a pipe flexible.
- Gas lines attached to the carriage metallurgical are themselves connected to a circuit stationary gas supply via a flexible pipe of considerable length.
- the carriage metallurgical accordingly draws its flexible pipe behind him.
- the flexible pipe constitutes a kind of umbilical cord which links the movable metallurgical carriage to fixed installations.
- the present invention offers a device for coupling a carriage metallurgical to at least one flexible pipe which does not requires for the coupling operation and uncoupling of the metallurgical carriage to this pipe flexible no human intervention in the immediate vicinity of the metallurgical carriage.
- the latter is stopped in a predefined mating position on its way to rolling. Close to this mating position is finds the mating station. Its support block is in its garage position and supports the second half coupling. The locking device of the second coupling half is in its second position of interlock, in which it cooperates with at least one element of said support block so as to lock the second coupling half on the support block. This last one is then moved with the second coupling half from its garage position towards the first coupling half, and the second coupling half is axially received on the first coupling half.
- the station control device coupling is actuated to impose on the device locking the second coupling half its first locking position, in which it cooperates with minus one element of the first half coupling so that lock the second coupling half in position coupled on the first coupling half.
- the empty support block to its garage position to complete the cart connection operation metallurgical flexible pipe.
- Carriage metallurgical can now continue its course in driving flexible driving.
- the latter is again arrested in a predefined mating position on its way to rolling. Close to this mating position is finds the coupling station with its support block empty in its garage position. The support block is then moved from its garage position towards the second half coupling. Then the control of the coupling station is activated for impose on the locking device of the second coupling half its second locking position, in which it cooperates with at least one element of the block of support so as to lock the second coupling half on the station support block coupling. It remains to move the support block with the second coupling half in its garage position for complete the pipe disconnection operation flexible. The metallurgical cart can now continue running without having to drive flexible.
- the proposed device is particularly simple and requires no energy auxiliary on the metallurgical carriage to realize mating.
- the metallurgical trolley was fitted with a fixing and guiding structure for flexible driving.
- it is the second half coupling which forms a unit with a fixing structure and guide for flexible pipe. So guidance optimal flexible driving is guaranteed in a way simple but clever, both on the cart metallurgical than at the coupling station.
- the latter advantageously comprises a first pair of pins that can be engaged parallel to the axis coupling in a first pair of bores in the second half coupling.
- the latter advantageously includes a second pair of pins can be engaged parallel to the coupling axis in a second pair of bores of the second half coupling.
- the locking device then comprises advantageously a locking plate which is movable between a first position and a second position, so that in the first position it engages in notches of the first pair of pins to lock the second coupling half on the block of the coupling station, and that in the second position it engages in notches in the second pair of pins to lock the second coupling half on the first coupling half.
- the control device then comprises two cylinders symmetrical control with respect to the actuation lever. It is, in a harsh environment, a device simple and reliable to control the locking of the second half coupling, or on the first half coupling, either on the support block of the coupling device. It will also be appreciated that the auxiliary energy required to operate the control device must only be available at the coupling station.
- the first coupling half is advantageously mounted on the metallurgical carriage so as to have a degree of freedom in a first direction perpendicular to the coupling pin
- the support block is mounted on the coupling station so as to have a degree of freedom according to a second direction which is perpendicular to the coupling axis and perpendicular to said first direction.
- the degree of freedom of the block support is advantageously a horizontal degree of freedom defined symmetrically around a central position by elastic elements.
- the degree of freedom of the first half coupling is advantageously a degree of freedom vertical defined against elastic elements producing an upward elastic force. In this way the first half coupling and support block can self-align along the coupling axis, while maintaining the rigidity and robustness necessary in this environment.
- One of the two half couplings advantageously comprises a male half coupling which cooperates with a half coupling female from the other half mating.
- the half male connector is then advantageously slidable axially against the action of a spring so as to create, during the coupling of the two coupling halves, a pressure of contact between the two half-fittings. It's about a execution which guarantees sufficient contact pressure between the two half-fittings without risking their destruction by an excessive axial coupling force.
- Flexible pipe usually includes at least one flexible gas pipe.
- Figure 1 shows in a plan view a carriage metallurgical 10 which is movable along a path of bearing 12 from position A to the right of the drawing towards a position C to the left of the drawing. It is a cart from type used in steel mills to carry a pocket metallurgical 14, for example to the casting plant keep on going.
- the carriage 10 In position A, which is most often located outside of the building containing the steelworks proper, the carriage 10 receives an empty metallurgical pocket 14. The carriage 10 then transports the metallurgical ladle 14 into position B, where it is filled with steel. In position C the pocket 14 is removed from the carriage 10 to pour the steel for example in the "tundish" (not shown) of a continuous casting installation.
- the gas distribution circuit 16 was permanently connected to a flexible supply line that the carriage 10 drove behind it, from position A to position C and vice versa.
- the coupling device according to the present invention allows however to reduce this minimum length of the flexible pipe to BC / 2, where BC represents the distance from B to C.
- the flexible pipe 20 can be automatically connected to, respectively disconnected from the distribution circuit 16 of the carriage 10, in at least one defined coupling position in close proximity to position B.
- position B is a danger zone, it is important to emphasize that the device according to the invention makes it possible to couple, respectively the uncoupling of the flexible pipe 20 without human intervention in this danger zone.
- the first coupling half 22 mounted on the carriage 10 will be described using Figures 3 and 4.
- Figure 4 we sees that it is a half coupling supporting a female part (or female half-connector) 28 which forms with a corresponding male part (or male half-connector) 30 of the second coupling half 24 (see Figure 5) a fitting for gas.
- the reference 32 indicates in Figure 3 a fixed part connection female 28 to a pipe 16 'forming part of the circuit 16 on the carriage 10.
- the part female 28 defines a kind of bowl in which the male part 30 can center itself automatically when penetration.
- the female part 28 is integral with a chassis 34, which is itself mounted on a fixed support plate 36 laterally on the carriage 10. It will be appreciated that the half coupling 28 which is part of the first coupling half 22 does not include any protruding parts which could be damaged on carriage 10. In Figure 2 we see in more detail the location of the first half coupling 22 on the carriage 10. It will be noted that the axis center of female part 28 defines an axis coupling 38 which is preferably horizontal and perpendicular to the raceway 12.
- the mounting of the frame 34 on the support plate 36 is carried out preferably using four rods 40 in which the frame 34 can slide perpendicular to axis 38. Compression springs 42 then push the frame 34 against the support plate 36.
- the first half coupling has the freedom to lift, in the axis rods 40, its support plate 36 against the action springs 42.
- the chassis 34 is still provided with a pair 44 'and 44' 'pins whose axes are parallel to the coupling pin 38.
- these two pins 44 ' and 44 '' are preferably symmetrical about the axis 38.
- the references 46 'and 46' ' indicate a pair of bores receiving a second pair of pins described later.
- the second coupling half 24, which is connected to the free end of the flexible pipe 20 will be described in using Figures 5 and 6.
- the male part 30, which forms the gas connection in cooperation with the female part 28, is mounted in a chassis 50.
- This assembly is carried out preferably so that the male part 30, which protrudes relative to the chassis 50 is axially movable in the frame 50 against the action of a spring 52.
- the latter surrounds the male part 30 and is axially supported by a side on the male part 30 and on the other side on the chassis 50.
- a rear shoulder 54 and a shoulder before 56 which are both attached to the part male 30 cooperate with support surfaces integral with the chassis 50 to limit the axial travel of the part male 30 in two opposite directions.
- the chassis 50 of the second coupling half comprises another first pair of 58 'and 58' 'bore and one second pair of 60 'and 60' 'bores.
- the first pair 58 'and 58' 'bore is arranged to receive the pair of pins 44 'and 44' 'of the first coupling half 22.
- the second pair of 60 'and 60' 'bores is arranged so as to receive a pair of pins 62 'and 62' ', which is symmetrical to the pair of pins 44 'and 44' ', but which is supported by the coupling station 26.
- pins 44 ', 44' ', 62' and 62 '' are cylindrical parts with pointed ends which easily engage in corresponding bores 58 'and 58' ', 60' and 60 '', but which also provide fairly precise guidance of the second coupling half along the coupling axis.
- Each pin 44 ', 44 '', 62 'and 62' ' also includes a notch 64 whose function will be described below in relation to the locking of the second coupling half on the first coupling half 22, respectively on the station coupling 26.
- the support frame 50 of the second coupling half is therefore axially lockable on both pins 62 'and 62' 'integral with the station of coupling 26.
- the second coupling half is by lockable axially on the two pins 44 ' and 44 '' which are integral with the first coupling half.
- the lever 68 makes it possible to pivot the locking plate 66 of said first in said second position and vice vice versa.
- the second coupling half 24 is integral with a structure of guide and fixing 70 of the flexible pipe 20.
- This structure 70 includes a support plate 72 and two guide surfaces 74 and 76 which are perpendicular to the support plate 72.
- the guide surface 74 defines a minimum bending radius of the flexible pipe 20 in a first direction of movement of the carriage 10; the guide surface 76 defines a minimum bending radius in the opposite direction.
- the end of the pipe flexible 20 is mechanically fixed using a flange 78 to the support plate 72.
- the third unit of the device i.e. the coupling station 26, is described using the Figures 7, 8 and 9. It includes a carriage coupling 80 displaceable using rollers 81 on guide rails 82 (see Figure 8). These guide rails 82 are supported by a support structure (not shown) so that the carriage 80 can be moved along these guide rails 82 from a garage position, located laterally next to the raceway 12, towards of the first coupling half 22 parallel to the axis 38 of the latter, if the carriage metallurgical 10 is in its coupling position predefined.
- the drive means of this cart coupling 80 is for example a hydraulic cylinder or tire 84 which produces a displacement of travel C of the coupling carriage 80 (see Figure 9). Of course we could also use any other device drive capable of producing a rectilinear movement to go back from race C.
- the carriage 80 supports itself at its front end a support block 86 which is designed to receive and support in the coupling axis 38 the second coupling half 24. To this end it includes the pair of pins 62 'and 62' 'which was described above. He will be note that the support block 86 is not rigidly fixed on the coupling carriage 80, but that it is supported so that it can slide perpendicular to axis 38, for example in a pair of rods 88 mounted at the front end of the carriage 80. These rods 88 are advantageously oriented in one direction perpendicular to the direction defined by the rods 40 of the first half coupling. In the figures the rods 40 are for example vertical, while the rods 88 are horizontal. Springs 90 then define elastically a central position of the support block 86 on the pair of rods 88.
- the coupling carriage 80 still supports a control device 92 of the lever 68 of the plate lock 66 of the second coupling half 24.
- This control device 92 comprises for example two cylinders 94 and 96 which are arranged on arms 98 ' and 98 '' from the coupling carriage 80 so that they lie in the pivoting plane of the plate locking 66, on both sides of the lever 68, when pins 62 'and 62' 'are fully engaged in the 60 'and 60' 'bores of the second coupling half.
- pins 62 'and 62' ' are each provided with a shoulder 100 which cooperates with bearing surfaces on the second coupling half so to define an axial arrangement of the second coupling half on pins 62 'and 62' 'for which the plate lock 66 can penetrate into the notches 64.
- the cylinder 84 is actuated to move the coupling carriage 80 parallel to the axis coupling 38 towards the first coupling half on the metallurgical carriage 10.
- Pins 44 'and 44' 'of the first coupling half penetrate through the 58 'and 58' 'bores of the second coupling half and the male part 30 enters the female part 28 to connect the gas lines 20 and 16. If there is horizontal misalignment between the two coupling halves 22 and 24, the second half coupling slides in its rods 88. If there is a misalignment vertical between the two half-couplings 22 and 24, the first coupling half slides in its rods 40.
- the first half mating is generally lower than the second half coupling, mating because the relative position of the two is adjusted for carriage 10 without the pocket 14.
- the movement of the jack 84 is stopped by a limit switch 102 mounted on the second coupling half.
- This limit switch is by example actuated by the male part 30 during its retraction axial or by one of the two pins 44 'and 44' '.
- the second coupling 24 is now engaged on the pins 44 'and 44' 'of the first coupling half so that the locking plate 66 can penetrate into the notches 64 of these. In this position the part male 30 is pressed into the female part 28 with a sufficient contact pressure by spring 52.
- the conduct flexible 20 basically includes flexible hoses for process gases. It is however obvious that this flexible pipe 20 could also include hoses for compressed air and liquids as well as cables for the transfer of electrical energy or signals; provided that the first coupling half is fitted and the second half coupling with half fittings adequate.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Pipe Accessories (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
en ce que une station d'accouplement est localisée près d'une position d'accouplement prédéfinie pour le chariot métallurgique, cette station d'accouplement comprenant
- un bloc de support conçu pour recevoir et supporter ledit deuxième demi-accouplement,
- des moyens pour déplacer le bloc de support d'une position de garage en direction du premier demi-accouplement et vice versa, lorsque le chariot métallurgique se trouve dans sa position d'accouplement prédéfinie, et
- un dispositif de commande, et
- en ce que le deuxième demi-accouplement est muni d'un dispositif de verrouillage qui est actionnable par ledit dispositif de commande et qui définit une première position de verrouillage, dans laquelle il coopère avec au moins un élément du premier demi-accouplement demi-accouplement de façon à verrouiller le deuxième demi-accouplement, en position accouplée sur le premier et une deuxième position de verrouillage, dans laquelle il coopère avec au moins un élément dudit support de façon à verrouiller le deuxième demi-accouplement sur son support sur la station d'accouplement.
- la Figure 1 représente, dans une vue en plan, un chariot métallurgique dans différentes positions;
- la Figure 2 représente une élévation du chariot métallurgique de la Figure 1;
- la Figure 3 représente une coupe à travers un demi-accouplement monté sur le chariot de la Figure 1;
- la Figure 4 montre une vue de face du demi-accouplement de la Figure 3;
- la Figure 5 montre une coupe à travers un deuxième demi-accouplement qui peut être accouplé sur le premier demi-accouplement de la Figure 3;
- la Figure 6 montre une vue de face du deuxième demi-accouplement de la Figure 5;
- la Figure 7 montre une station d'accouplement recevant le demi-accouplement de la Figure 5;
- la Figure 8 montre une vue en plan de la station d'accouplement de la Figure 7;
- la Figure 9 montre une deuxième position de la station d'accouplement de la Figure 7.
Claims (12)
- Dispositif pour l'accouplement d'un chariot métallurgique (10) à une conduite flexible (20), comprenantun premier demi-accouplement (22) monté sur le chariot métallurgique (10),un deuxième demi-accouplement (24) connecté à une extrémité de la conduite flexible (20) et conçu de façon à pouvoir être reçu sur le premier demi-accouplement (22),en ce que une station d'accouplement (26) est localisée près d'une position d'accouplement prédéfinie pour le chariot métallurgique (10), cette station d'accouplement (26) comprenantun bloc de support (86) conçu pour recevoir et supporter ledit deuxième demi-accouplement (24),des moyens d'entraínement pour déplacer le bloc de support (86) d'une position de garage en direction du premier demi-accouplement (22) et vice versa, lorsque le chariot métallurgique (10) se trouve dans sa position d'accouplement prédéfinie, etun dispositif de commande (92), eten ce que le deuxième demi-accouplement (24) est muni d'un dispositif de verrouillage qui est actionnable par ledit dispositif de commande et qui définitune première position de verrouillage dans laquelle il coopère avec au moins un élément du premier demi-accouplement (22) de façon à verrouiller le deuxième demi-accouplement (24) en position accouplée sur le premier demi-accouplement (22), etune deuxième position de verrouillage dans laquelle il coopère avec au moins un élément dudit support de façon à verrouiller le deuxième demi-accouplement (24) sur son support sur la station d'accouplement (26).
- Dispositif selon la revendication 1, caractérisé en ce que le deuxième demi-accouplement (24) forme une unité avec une structure de guidage et de fixation (70) pour la conduite flexible (20).
- Dispositif selon la revendication 1, caractériséen ce le bloc de support (86) comprend une première paire de broches (62', 62") engageables dans une première paire d'alésages (60', 60") du deuxième demi-accouplement (24), eten ce le premier demi-accouplement (22) comprend une seconde paire de broches (44', 44") engageables dans une seconde paire d'alésages (58', 58") du deuxième demi-accouplement (24).
- Dispositif selon la revendication 3, caractérisé en ce que les broches d'une paire sont symétriques par rapport à l'axe d'accouplement (38).
- Dispositif selon la revendication 3 ou 4, caractérisé en ce que le dispositif de verrouillage comprend une plaque de verrouillage (66) qui est déplaçable entre une première position et une deuxième position de façon que dans la première position elle s'engage dans des encoches (64) de la première paire de broches (62', 62") pour verrouiller le deuxième demi-accouplement (24) sur le bloc de support (86) de la station d'accouplement (26), et que dans la deuxième position elle s'engage dans des encoches (64) de la deuxième paire de broches (44', 44") pour verrouiller le deuxième demi-accouplement (24) sur le premier demi-accouplement (22).
- Dispositif selon la revendication 5, caractérisé en ce que la plaque de verrouillage (66) comprend un levier d'actionnement (68), et en ce que le dispositif de commande (92) comprend deux vérins de commande (94, 96) symétriques par rapport au levier d'actionnement (68).
- Dispositif selon l'une quelconque des revendication 1 à 6, caractériséen ce que le premier demi-accouplement (22) est monté sur le chariot métallurgique (10) de façon à avoir un degré de liberté selon une première direction perpendiculaire à l'axe d'accouplement (38), eten ce que le bloc de support (86) est monté sur la station d'accouplement (26) de façon à avoir un degré de liberté selon une deuxième direction qui est perpendiculaire à l'axe d'accouplement (38) et perpendiculaire à ladite première direction.
- Dispositif selon la revendication 7, caractérisé en ce que le degré de liberté du bloc de support (86) est défini selon une direction horizontale par des éléments élastiques (88, 90) symétriquement autour d'une position centrale.
- Dispositif selon la revendication 7 ou 8, caractérisé en ce que le degré de liberté du premier demi-accouplement (22) est un degré de liberté vertical défini contre des éléments élastiques (42) produisant une force élastique vers le haut.
- Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'un des deux demi-accouplements (24) comprend un demi-raccord mâle (30) qui coopère avec un demi-raccord femelle (28) de l'autre demi-accouplement (22).
- Dispositif selon la revendication 10, caractérisé en ce que le demi-raccord mâle (30) est coulissable axialement contre l'action d'un ressort (52).
- Dispositif selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la conduite flexible (20) comprend au moins un tuyau flexible de gaz.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88457A LU88457A1 (fr) | 1994-02-02 | 1994-02-02 | Dispositif pour l'accouplement d'un chariot métallurgique à une conduite flexible |
LU88457 | 1994-02-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0666324A1 EP0666324A1 (fr) | 1995-08-09 |
EP0666324B1 true EP0666324B1 (fr) | 2000-04-19 |
Family
ID=19731463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95100345A Expired - Lifetime EP0666324B1 (fr) | 1994-02-02 | 1995-01-12 | Dispositif pour l'accouplement d'un chariot métallurgique à une conduite flexible |
Country Status (10)
Country | Link |
---|---|
US (1) | US5520374A (fr) |
EP (1) | EP0666324B1 (fr) |
AT (1) | ATE191935T1 (fr) |
AU (1) | AU691222B2 (fr) |
BR (1) | BR9500530A (fr) |
CA (1) | CA2140219A1 (fr) |
DE (1) | DE69516321T2 (fr) |
ES (1) | ES2145167T3 (fr) |
LU (1) | LU88457A1 (fr) |
ZA (1) | ZA95470B (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU87082A1 (fr) * | 1987-12-18 | 1989-07-07 | Wurth Paul Sa | Dispositif d'accouplement d'une poche metallurgique a un reseau de gaz |
US5065986A (en) * | 1990-07-30 | 1991-11-19 | Insul Company, Inc. | Automatic gas hookup to a ladle |
LU87868A1 (fr) * | 1990-12-21 | 1992-08-25 | Wurth Paul Sa | Raccord rapide double flux pour l'accouplement automatique et simultane d'une poche metallurgique a deux reseaux de gaz differents |
LU88014A1 (fr) * | 1991-10-09 | 1993-05-17 | Wurth Paul Sa | Dispositif d'accouplement automatique entre des conduites sur une station de traitement et une poche métallurgique |
-
1994
- 1994-02-02 LU LU88457A patent/LU88457A1/fr unknown
-
1995
- 1995-01-12 EP EP95100345A patent/EP0666324B1/fr not_active Expired - Lifetime
- 1995-01-12 DE DE69516321T patent/DE69516321T2/de not_active Expired - Fee Related
- 1995-01-12 ES ES95100345T patent/ES2145167T3/es not_active Expired - Lifetime
- 1995-01-12 AT AT95100345T patent/ATE191935T1/de not_active IP Right Cessation
- 1995-01-13 CA CA002140219A patent/CA2140219A1/fr not_active Abandoned
- 1995-01-20 ZA ZA95470A patent/ZA95470B/xx unknown
- 1995-01-31 US US08/390,297 patent/US5520374A/en not_active Expired - Fee Related
- 1995-01-31 AU AU11516/95A patent/AU691222B2/en not_active Ceased
- 1995-02-01 BR BR9500530A patent/BR9500530A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE191935T1 (de) | 2000-05-15 |
DE69516321T2 (de) | 2000-09-07 |
AU1151695A (en) | 1995-08-10 |
ES2145167T3 (es) | 2000-07-01 |
LU88457A1 (fr) | 1995-09-01 |
ZA95470B (en) | 1995-09-28 |
DE69516321D1 (de) | 2000-05-25 |
CA2140219A1 (fr) | 1995-08-03 |
US5520374A (en) | 1996-05-28 |
EP0666324A1 (fr) | 1995-08-09 |
BR9500530A (pt) | 1995-10-24 |
AU691222B2 (en) | 1998-05-14 |
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