EP0657222B1 - Injektordüse - Google Patents
Injektordüse Download PDFInfo
- Publication number
- EP0657222B1 EP0657222B1 EP94117615A EP94117615A EP0657222B1 EP 0657222 B1 EP0657222 B1 EP 0657222B1 EP 94117615 A EP94117615 A EP 94117615A EP 94117615 A EP94117615 A EP 94117615A EP 0657222 B1 EP0657222 B1 EP 0657222B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- injector nozzle
- mixing chamber
- chamber
- outlet
- 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
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
- B05B1/326—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve being a gate valve, a sliding valve or a cock
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
Definitions
- the invention relates to an injector nozzle for production air-filled liquid drop, according to the Preamble of claim 1.
- nozzles for example a liquid and a gaseous medium fed under pressure, these media within a Mixing chamber are mixed together.
- additional air is usually only used to increase speed the particles or droplets or Refinement of the drop spectrum, i.e. for downsizing the average drop diameter is used.
- Air pressure also affects the amount of the liquid sprayed out, causing the technical Effort through facilities for quantity regulation or -constant maintenance is still increased.
- an injector nozzle which attaches itself to a metering nozzle with an outlet bore a Venturi tube connects, which is a kind of nozzle body forms.
- a venturi channel is central in this venturi tube trained, one against the dosing nozzle backwards conically widening mouth as well as a adjoining the conical mouth in the direction of flow, obviously essentially cylindrical Venturi hole contains that in one Embodiment in a jump in cross section extended mixing chamber, which in turn opens with the spray nozzle outlet is in flow communication; after some other embodiments are separate Mixing chamber apparently not required.
- the invention is therefore based on the object Injector nozzle of the prerequisite in the preamble of claim 1 kind of creating that while maintaining the advantages of the known known Versions as well as a relatively simple construction through a particularly high uniformity of the drop sizes and a largely fluctuation-free distribution characteristic distinguishes this drop of liquid.
- this injector nozzle expanded the chamber designed as a mixing chamber is conical Towards the cavity, and this cavity forms a homogenizing and calming room with the effect a pulsation damper.
- This homogenization and calming room can be designed as a wind chamber-like cavity and acts as a kind of pulsation dampener or pressure accumulator, whereby the undesirable fluctuations, as in the known designs explained occur largely and in general even can be completely avoided, this also for so-called micropulsations applies.
- this homogenizing and calming room is also a particularly high uniformity in the Size of the liquid drop at essentially fluctuation-free distribution characteristics achieved.
- the so from the outlet opening of the outlet element air-filled liquid drops emerging from this injector nozzle are extremely unaffected by wind and worry thus for an optimal covering structure of the ejected Liquid on a target surface, for example Plant surfaces when it comes to spreading and Distributing crop protection products goes.
- the inventive Injector nozzle the inlet cross-section of the homogenizing and calming space about 1.5 to 9 times Value, preferably 3 to 5 times the value of the outlet cross-section the mixing chamber.
- the Cavity forming a homogenizing and calming space have at least about twice the volume of that Mixing chamber, the shapes and configurations of this Different in a very favorable way Purposes can be customized. Accordingly can the homogenization and calming room Have total length that is greater than the length of the Mixing chamber.
- the homogenizing and calming room a rear Has space area that the forming the mixing chamber Component encloses in a ring.
- the uniformity of the size of the liquid drops can also in an advantageous manner if necessary be improved in that between the mixing chamber and the outlet element, preferably by a Wire mesh or perforated sheet formed, perforated Element is provided.
- the air intake opening the mixing chamber to a device, preferably a throttle device to change the intake air quantity can be connected. In this way if necessary, the drop exit speed and drop size are affected.
- the air intake opening of the mixing chamber can also also to an air system under pressure, preferably to the exhaust system of a carrier vehicle, be connectable. This can be the case, for example if the injector nozzle belongs to an injection unit, with the pesticide should and that of a motor vehicle with an internal combustion engine will be carried.
- This injector 1 is air-filled to generate Drops of liquid are formed and contain as main components a dosing nozzle element 2 for generating a Liquid jet, a central nozzle body 3 with a centrally formed one in the flow direction (Arrow 4) of the liquid jet onto the dosing nozzle element 2 following mixing chamber 5, which with a Air intake 6 is provided and for generation a liquid-air mixture is used, as well as an in Shape of a distributor mouthpiece 7 formed outlet element, with at least one outlet opening 8 is provided for the liquid-air mixture.
- This outlet element or distributor mouthpiece 7 is interchangeably provided by using a Quick release system is attached to the nozzle body 3, which is preferably a bayonet fitting 9 can act.
- FIGS. 1 and 2 is the distributor mouthpiece 7 facing away End of the nozzle body 3 with an open to the outside, provided central, axial threaded bore 10, on the bottom 10a of the dosing nozzle element 2 in the Way is loosely supported that its nozzle opening is coaxial to the central longitudinal axis 1a as well as directly subsequent mixing chamber 5 is aligned.
- This dosing nozzle element 2 can thus be replaced in the threaded bore 10 is added and by a plug-like threaded adapter with external thread 11 set the one coaxial to the longitudinal axis of the nozzle 1a aligned through hole 11a and on its opposite the dosing nozzle element 2 Provide a union nut 12 at the end is through which the whole injector 1 to a corresponding - Line not illustrated here (Pipe system) can be connected through which brought a liquid to be distributed under pressure becomes.
- FIG. 1 also shows, there is 5 between the mixing chamber and the distributor mouthpiece 7 has a cavity, through which a homogenizing and calming space 13 is formed is the entrance cross-section (indicated abruptly by the dash-dotted line 13a) with respect to the outlet cross section 5a of the mixing chamber 5 is enlarged.
- This inlet cross section 13a of the homogenizing and calming space 13 has approximately that 1.5 to 9 times the value, preferably 3 to 5 times Value of the outlet cross section 5a of the mixing chamber 5 on.
- the Homogenization and calming space 13 according to the respective application requirements of the injector nozzle 1 be designed differently.
- the homogenizing and calming space 13 can have an overall length L that is greater than the length of the mixing chamber 5.
- the homogenizing and calming space 13 a rear space 13b, which the mixing chamber 5 forming component 3a of the nozzle body 3 annular encloses.
- an annular sealing body 14 suitable sealing or buffer material arranged is, the interior of which also forms part of the homogenizing and calming space 13.
- Figure 1 In the embodiment illustrated in Figure 1 is that which extends coaxially to the longitudinal axis 1a of the nozzle Mixing chamber 5 designed so that they become Homogenization and calming space 13 expanded conically, so that overall training according to Art of the known Venturi system.
- the air intake 6 approximately in the form of a radial Be bore and - in the direction of flow (Arrow 4) looking at the liquid jet - into the rear, approximately cylindrical widened end 5b of the mixing chamber 5 flow into.
- the interchangeable dosing nozzle element 2 can also be designed in different ways. According to the embodiment in Fig. 1 assume that it is self-centering. For this purpose the front end 2b containing the nozzle opening 2a this dosing nozzle element 2 is approximately conical be and partly in the roughly cylindrical rear Engage end 5b of mixing chamber 5.
- the outlet opening 8 provided therein can each for the respective application of the injector nozzle 1 have appropriate training to the emerging Liquid-air mixture, for example, in the form of a To give flat jet, full cone, cone or the like.
- 1 ' is located inside the injector nozzle.
- the homogenizing and calming space 13 'in particular large-volume and designed with a room area 13'a, which is larger in diameter than the rest Spaces of this homogenizing and calming room 13 'has.
- This room area expanded in diameter 13'a is provided approximately in the longitudinal section of the homogenizing and calming space 13 ', which the Outlet cross-section 5a surrounds the mixing chamber 5, so that a particularly large inlet cross section of the Homogenizing and calming space 13 'in comparison to the outlet cross section 5a of the mixing chamber 5 is.
- At least the front area 13'c of the room 13 ' can also move in the direction of flow (arrow 4) Extend the liquid jet slightly conically.
- FIG. 4 shows an embodiment of the injector nozzle 1 '' illustrates their homogenizing and calming space 13 '' similar to the homogenization and calming room 13 'can be implemented according to FIG. 3, with the exception that that here (Fig. 4) there is no enlarged spatial area is available. Rather, the homogenizing and calming space 13 ′′ extends as shown in FIG its entire length in the direction of flow (arrow 4) slightly conical.
- the embodiment shows the embodiment the injector nozzle 1 '' 'in Fig. 5 yet another Special feature insofar as it is interchangeable arranged in the threaded bore 10 and dosing nozzle element defined by the threaded adapter 11 2 'essentially in the form of a nozzle disk can be surrounded by an O-ring 17 is made of an elastic sealing material can and this dosing nozzle element 2 'with his Align nozzle opening 2'a coaxially to the longitudinal axis 1 '' 'a, whereby a kind of self-centering is also achieved here can be.
- FIG. 7 shows an embodiment of the injector nozzle, in which the homogenization and calming room 13 '' '' 'between the mixing chamber 5 and the distributor mouthpiece 7 kept particularly small in volume is, but also an abrupt increase its entrance cross-section compared to the Has outlet cross section of the mixing chamber 5. Also in this case it is again assumed that between the mixing chamber 5 and the distributor mouthpiece 7 a perforated Element (preferably wire mesh 16 or Perforated plate 15) is provided, the same as in 5 and 6 - in the annular sealing body 14 can be installed.
- a perforated Element preferably wire mesh 16 or Perforated plate 15
- a cover 18 When executing the injector nozzle according to Fig. 7 to mention another peculiarity. After that can the air intake 6 through a cover 18 be protected, preferably - as illustrated in Fig.7 - In the form of a ring diaphragm which covers a kind of annulus or annular gap 18a and in an axial extension of the sleeve-like fastening part 19 of the bayonet catch 9 or at another version of the quick release system for the distributor mouthpiece 7 also in a fastening nut or union nut can be integrated can. On such a cover 18 of the air intake opening 6 can possibly flow back liquid particles be caught, so that there is a separate Check valve with the associated operational Disadvantages can be avoided in a simple manner can.
- Air intake opening 6 With regard to the structural design in the area of Air intake opening 6 is again based on the figure 4 illustrated embodiment received. There there is also an option specified, such as the Air intake 6 of the mixing chamber 5 to a device preferably to a throttle device 20 for Change in the amount of air sucked in can be.
- This throttle device illustrated at 20 can of course also by any other suitable device must be formed, the corresponding Change or control of the intake Air volume allowed.
- Fig. 8 shows an embodiment of the distributor mouthpiece 7 'with a single outlet opening 8', the an adjustable cross-section in terms of shape and size having.
- the latter can be achieved that approximately in the area in front of this outlet opening 8 ' an adjusting perforated disk 21 in the manner of an adjusting aperture can be provided that either twisted or can be moved transversely or radially around the nozzle outlet opening 8 'or their cross section in the desired Way to adjust.
- Fig. 9 shows an embodiment in which this in turn designed as a distributor mouthpiece 7 '' has a plurality of outlet openings 8 ′′, which in with respect to the nozzle longitudinal axis 1a to each other to the outside can be aligned divergent.
Landscapes
- Nozzles (AREA)
- Fuel-Injection Apparatus (AREA)
- Percussion Or Vibration Massage (AREA)
Description
- Fig.1
- einen Axial-Längsschnitt durch eine erste Ausführungsform der erfindungsgemäßen Injektordüse;
- Fig.2
- eine auseinandergezogene Perspektivansicht dieser erfindungsgemäßen Injektordüse;
- Fig.3 bis 7
- ähnliche Axial-Längsschnitte wie Fig.1, jedoch zur Erläuterung einiger weiterer Ausführungsformen, insbesondere im Bereich des Homogenisier- und Beruhigungsraumes;
- Fig.8 und 9
- ähnliche Axial-Längsschnitte wie Fig.1, jedoch zur Erläuterung einiger Ausführungsvarianten für das Austrittselement.
Claims (16)
- Injektordüse zur Erzeugung luftgefüllter Flüssigkeitstropfen, enthaltenda) ein Dosierdüsenelement (2, 2') zur Erzeugung eines Flüssigkeitsstrahles,b) einen Düsenkörper (3) mit einer in Strömungsrichtung (4) des Flüssigkeitsstrahles auf das Dosierdüsenelement folgenden Kammer (5), in deren erweitertes hinteres Ende (5b) eine Luftansaugöffnung (6) zur Erzeugung eines Flüssigkeits-Luft-Gemisches einmündet und die nach Art eines Venturi-Systems ausgebildet ist,c) sowie ein mit wenigstens einer Austrittsdüse (8) für das Flüssigkeits-Luft-Gemisch versehenes Austrittselement (7),d) wobei zwischen der Kammer (5) und dem Austrittselement (7) ein sprunghaft gegenüber dem Austrittsquerschnitt (5a) der Kammer erweiterter Hohlraum (13, 13'...) vorgesehen ist,
dadurch gekennzeichnet, daße) die als Mischkammer (5) ausgebildete Kammer sich konisch in Richtung auf den Hohlraum (13, 13'...) erweitert und dieser Hohlraum einen Homogenisier- und Beruhigungsraum (13, 13', 13'') mit der Wirkung eines Pulsationsdämpfers bildet. - Injektordüse nach Anspruch 1, dadurch gekennzeichnet, daß der Eintrittsquerschnitt (13a) des Homogenisier- und Beruhigungsraumes (13) den 1,5-bis 9-fachen Wert, vorzugsweise den 3- bis 5fachen Wert des Austrittsquerschnitts (5a) der Mischkammer (5) aufweist.
- Injektordüse nach Anspruch 1, dadurch gekennzeichnet, daß der Homogenisier- und Beruhigungsraum (13, 13', 13'') eine Gesamtlänge (L) besitzt, die größer als die Länge der Mischkammer (5) ist.
- Injektordüse nach Anspruch 1, dadurch gekennzeichnet, daß der Homogenisier- und Beruhigungsraum (13, 13', 13'') einen hinteren Raumbereich (13b, 13') aufweist, der das die Mischkammer (5) bildende Bauteil (3a) ringförmig umschließt.
- Injektordüse nach Anspruch 1, dadurch gekennzeichnet, daß der Homogenisier- und Beruhigungsraum (13') wenigstens einen Raumbereich (13'a) aufweist, der einen größeren Durchmesser als die übrigen Raumbereiche des Homogenisier- und Beruhigungsraumes besitzt.
- Injektordüse nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Mischkammer (5) und dem Austrittselement (7) ein vorzugsweise durch ein Drahtgewebe (16) oder ein Lochblech (15) gebildetes, perforiertes Element vorgesehen ist.
- Injektordüse nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß das Austrittselement (7) auswechselbar ist.
- Injektordüse nach Anspruch 7, dadurch gekennzeichnet, daß das Austrittselement (7) mittels eines Schnellverschlußsystemes, vorzugsweise eines Bajonettverschlusses (9), befestigt ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Dosierdüsenelement (2, 2') auswechselbar ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Dosierdüsenelement (2) selbstzentrierend ausgebildet ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Austrittselement (7'') mehrere Austrittsöffnungen (8'') aufweist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Austrittsöffnung (8') des Austrittselements (7') einen hinsichtlich Form und Größe einstellbaren Querschnitt aufweist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Luftansaugöffnung (6) der Mischkammer (5) an eine Einrichtung, vorzugsweise eine Drosselvorrichtung (20), zur Veränderung der angesaugten Luftmenge anschließbar ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Luftansaugöffnung der Mischkammer an ein unter Überdruck stehendes Luftsystem, vorzugsweise an das Abgassystem eines Trägerfahrzeugs, anschließbar ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Luftansaugöffnung (6) der Mischkammer (5) durch eine Abdeckung (18) geschützt ist, die vorzugsweise durch eine Ringblende gebildet wird, die in einen Befestigungsteil (19) des Schnellverschlußsystems (9) für das Austrittselement (7) integriert ist.
- Injektordüse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zur Einspeisung weiterer Flüssigkeiten und/oder Gase in die Mischkammer wenigstens eine weitere Ansaugöffnung vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4338585A DE4338585A1 (de) | 1993-11-11 | 1993-11-11 | Injektordüse |
DE4338585 | 1993-11-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0657222A1 EP0657222A1 (de) | 1995-06-14 |
EP0657222B1 true EP0657222B1 (de) | 1998-02-11 |
Family
ID=6502397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94117615A Expired - Lifetime EP0657222B1 (de) | 1993-11-11 | 1994-11-08 | Injektordüse |
Country Status (10)
Country | Link |
---|---|
US (1) | US5615836A (de) |
EP (1) | EP0657222B1 (de) |
AT (1) | ATE163142T1 (de) |
AU (1) | AU685512B2 (de) |
BR (1) | BR9404568A (de) |
DE (2) | DE4338585A1 (de) |
DK (1) | DK0657222T3 (de) |
ES (1) | ES2112466T3 (de) |
GR (1) | GR3026684T3 (de) |
RU (1) | RU94041755A (de) |
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DE102013225612B4 (de) | 2013-12-11 | 2017-12-14 | Lechler Gmbh | Injektordüse |
DE102014205399B3 (de) | 2014-03-24 | 2015-09-10 | Lechler Gmbh | Injektordüse |
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CA1090748A (en) * | 1978-06-27 | 1980-12-02 | Paul R. Stoesser | Foam-generating device for a pump sprayer |
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JPH0628570B2 (ja) * | 1986-02-13 | 1994-04-20 | 雪印乳業株式会社 | カプセル体の製造方法及び装置 |
IL79052A0 (en) * | 1986-06-06 | 1986-11-30 | Univ Ramot | Device and process for production of alginate-shell beads containing biologically active material |
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DE8911932U1 (de) * | 1989-10-06 | 1990-01-18 | Bersch & Fratscher GmbH, 8757 Karlstein | Farbspritzpistole |
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GB2256817B (en) * | 1991-06-21 | 1995-12-06 | Billericay Farm Services Limit | Improvements in spraying apparatus |
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DE4138471A1 (de) * | 1991-11-22 | 1993-05-27 | Bergmann Franz | Aufschaeumduese fuer fluessigkeiten |
US5431342A (en) * | 1992-11-23 | 1995-07-11 | Mcdonnell Douglas Corporation | Nozzle providing a laminar exhaust stream |
US5381957A (en) * | 1994-01-13 | 1995-01-17 | Bianco; Eric L. | Water/air mixing and dispensing devices |
-
1993
- 1993-11-11 DE DE4338585A patent/DE4338585A1/de not_active Withdrawn
-
1994
- 1994-10-26 US US08/329,528 patent/US5615836A/en not_active Expired - Lifetime
- 1994-11-03 AU AU77606/94A patent/AU685512B2/en not_active Expired
- 1994-11-08 EP EP94117615A patent/EP0657222B1/de not_active Expired - Lifetime
- 1994-11-08 DK DK94117615T patent/DK0657222T3/da active
- 1994-11-08 DE DE59405256T patent/DE59405256D1/de not_active Expired - Lifetime
- 1994-11-08 AT AT94117615T patent/ATE163142T1/de active
- 1994-11-08 ES ES94117615T patent/ES2112466T3/es not_active Expired - Lifetime
- 1994-11-10 BR BR9404568A patent/BR9404568A/pt not_active IP Right Cessation
- 1994-11-10 RU RU94041755/25A patent/RU94041755A/ru unknown
-
1998
- 1998-04-16 GR GR980400882T patent/GR3026684T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
DK0657222T3 (da) | 1998-09-23 |
ES2112466T3 (es) | 1998-04-01 |
ATE163142T1 (de) | 1998-02-15 |
AU685512B2 (en) | 1998-01-22 |
US5615836A (en) | 1997-04-01 |
RU94041755A (ru) | 1996-09-20 |
DE59405256D1 (de) | 1998-03-19 |
DE4338585A1 (de) | 1995-05-18 |
EP0657222A1 (de) | 1995-06-14 |
BR9404568A (pt) | 1995-06-20 |
GR3026684T3 (en) | 1998-07-31 |
AU7760694A (en) | 1995-05-18 |
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