EP0173923A2 - Heating boiler casing - Google Patents

Heating boiler casing Download PDF

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Publication number
EP0173923A2
EP0173923A2 EP85110596A EP85110596A EP0173923A2 EP 0173923 A2 EP0173923 A2 EP 0173923A2 EP 85110596 A EP85110596 A EP 85110596A EP 85110596 A EP85110596 A EP 85110596A EP 0173923 A2 EP0173923 A2 EP 0173923A2
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EP
European Patent Office
Prior art keywords
front wall
cover plate
seal
sealing
heat
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
EP85110596A
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German (de)
French (fr)
Other versions
EP0173923B1 (en
EP0173923A3 (en
Inventor
Hans Dr. Viessmann
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Individual
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Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to AT85110596T priority Critical patent/ATE60945T1/en
Publication of EP0173923A2 publication Critical patent/EP0173923A2/en
Publication of EP0173923A3 publication Critical patent/EP0173923A3/en
Application granted granted Critical
Publication of EP0173923B1 publication Critical patent/EP0173923B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels

Definitions

  • the invention relates to a boiler housing according to the preamble of the main claim.
  • Boiler housings of the type mentioned are generally known.
  • the cover plate is sealed by a relatively high frame welded to the front wall of the boiler, which presses against an asbestos cord arranged on the cover plate, which is arranged there between the thermal insulation block and a small delimitation web.
  • the exhaust gases can reach the welded frame largely unhindered by the gap between the thermal insulation block and the combustion chamber necessary for the pivoting of the sealing cover, so that condensate can form on the inside of the frame and destroy the frame.
  • a considerable amount of heat is radiated through the frame, which is not insulated from the outside, and the thermal insulation block sitting on the cover plate is exposed to the risk of damage since it is practically free.
  • the innovation is accordingly based on the object of designing a boiler housing of the type mentioned in the front wall area in such a way that the exhaust gases are kept away from the critical sealing area and thereby condensate formation and heat radiation in this area are largely prevented with the proviso that the thermal insulation block is largely protected against damage.
  • the front wall of the boiler housing in question has two or more openings, there is of course nothing to prevent a corresponding number of thermal insulation blocks and sealing webs from being arranged on a cover plate in accordance with the number of openings arranged in the front wall.
  • the front wall 5 of the boiler housing is provided with a sealing cover, which is formed from a cover plate 1 with a heat insulating block 2 arranged on the inside and protruding into a front wall opening 6.
  • a sealing web 3 which encompasses the flanks 12 of the thermal insulation block 2 and is pressed with its end edge 4 against the seal 7 arranged on the front wall 5 and surrounding the front wall opening 6.
  • the thermal insulation block 2 is largely seated with its entire height within the circular sealing web 3, and in a further development is advantageously sealed with a further seal 8 with respect to the sealing web 3 itself, in order thereby to remove the conical gap between the thermal insulation block 2 and also seal off sealing web 3.
  • the seal 7 essential for the overall seal is no longer seated on the cover plate 1 itself as before, but rather at a relatively large distance from it directly on the front wall 5 itself, which expediently has a front wall opening edge 9 and a larger front wall opening web 10, which is quite with respect to the overall spatial arrangement can have the width B shown.
  • a circumferential step 11 is formed in the thermal insulation block 2 from the outset, which, as can be seen, forms an annular groove with the sealing web 3, in which the seal 8 is arranged as a further seal.
  • the front wall opening 6 in FIG. 1 is, for example, the combustion chamber opening of the boiler housing.
  • a closure cover is shown in FIGS. 2, 3 and a front wall 5 of a boiler housing which has two front wall openings 6, the lower opening being the combustion chamber opening and the upper opening being a cleaning opening.
  • the rectangular cover plate 1 is provided with two corresponding heat insulation blocks 2 and two sealing webs 3 surrounding these insulation blocks, but the same design principle being implemented for each opening closure as described for FIG. 1.
  • the cover plate construction described also has the advantage, of course, that the thermal insulation block 2 is largely protected from damage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Details Of Valves (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Thermal Insulation (AREA)
  • Special Wing (AREA)
  • Gasket Seals (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
  • Cookers (AREA)
  • Air Supply (AREA)

Abstract

The heating boiler casing has a front wall with a closing cover which consists of a cover plate with an internally arranged heat- insulating block which projects into a front wall opening. Between front wall and cover plate, a seal is provided. On the cover plate (1), there is arranged a sealing ridge (3) which tightly surrounds the heat-insulating block on its sides (12) or is additionally sealed off against the heat-insulating block (2). This ridge is placed with its end edge (4) against the seal (7) which is arranged on the front wall (5) and surrounds the front wall opening (6). Apart from the fact that as a result the cover plate is better reinforced and the heat- insulating block is better protected against damage, this design counteracts formation of condensate and heat radiation in this region.

Description

Die Erfindung betrifft ein Heizkesselgehäuse gemäß Oberbegriff des Hauptanspruches.The invention relates to a boiler housing according to the preamble of the main claim.

Heizkesselgehäuse der genannten Art sind allgemein bekannt. Bei diesen bekannten Heizkesselgehäusen erfolgt die Abdichtung der Deckelplatte durch einen an der Kesselvorderwand angeschweißten relativ hohen Rahmen, der gegen eine an der Dekkelplatte angeordneten Asbestschnur drückt, die dort zwischen dem Wärmedämmblock und einem kleinen Begrenzungssteg angeordnet ist. Bei dieser bekannten Ausführungsform können die Abgase weitgehend ungehindert durch den für das Abschwenken des Verschlußdeckels notwendigen Spalt zwischen Wärmedämmblock und Brennkammer an den angeschweißten Rahmen gelangen, so daß sich an der Innenseite des Rahmens Kondensat bilden und den Rahmen zerstören kann. Außerdem wird über den nach außen nicht isolierten Rahmen in beträchtlichem Umfang Wärme abgestrahlt und der an der Deckelplatte sitzende Wärmedämmblock ist, da er praktisch freisteht, der Beschädigungsgefahr ausgesetzt.Boiler housings of the type mentioned are generally known. In these known boiler housings, the cover plate is sealed by a relatively high frame welded to the front wall of the boiler, which presses against an asbestos cord arranged on the cover plate, which is arranged there between the thermal insulation block and a small delimitation web. In this known embodiment, the exhaust gases can reach the welded frame largely unhindered by the gap between the thermal insulation block and the combustion chamber necessary for the pivoting of the sealing cover, so that condensate can form on the inside of the frame and destroy the frame. In addition, a considerable amount of heat is radiated through the frame, which is not insulated from the outside, and the thermal insulation block sitting on the cover plate is exposed to the risk of damage since it is practically free.

Der Neuerung liegt demgemäß die Aufgabe zugrunde, ein Heizkesselgehäuse der genannten Art im Vorderwandbereich derart auszubilden, daß die Abgase vom kritischen Abdichtungsbereich ferngehalten und dadurch Kondensatbildung und Wärmeabstrahlung in diesem Bereich weitestgehend unterbunden werden mit der Maßgabe, den Wärmedämmblock weitgehend gegen Beschädigungen zu sichern.The innovation is accordingly based on the object of designing a boiler housing of the type mentioned in the front wall area in such a way that the exhaust gases are kept away from the critical sealing area and thereby condensate formation and heat radiation in this area are largely prevented with the proviso that the thermal insulation block is largely protected against damage.

Diese Aufgabe ist mit einem Heizkesselgehäuse der genannten Art nach der Erfindung durch die im Kennzeichen des Hauptanspruches angeführten Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich nach den Unteransprüchen.This object is achieved with a boiler housing of the type mentioned according to the invention by the features stated in the characterizing part of the main claim. Advantageous further developments result from the subclaims.

Durch diese erfindungsgemäße Ausbildung des Heizkesselgehäuses im Bereich der Vorderwand bzw. des Verschlußdeckels ist praktisch kein für die Heizgase zugänglicher Spalt mehr vorhanden und außerdem ist die neue Gestaltung dieses Abdichtungsbereiches mit dem weiteren Vorteil verbunden, daß durch den den Wärmedämmblock umfassenden Dichtsteg, der sich in Schließstellung auf die an der Vorderwand unmittelbar selbst angeordnete Dichtung aufsetzt, die Deckelplatte eine zusätzliche Aussteifung erfährt und dadurch eine große Stabilität und Verwindungssteifheit erhält, was für derartige Deckelplatten bzw. Heizkesselverschlußtüren wichtig ist. Da die Dämmblöcke als Formstücke ausgeformt werden, ist es unvermeidbar, daß deren Umfangsflankenfläche eine gewisse Konizität erhalten muß, um das Formstück ausformen zu können. In Rücksicht darauf ist, sofern man nicht den Aufwand einer dichten Umschließung des Wärmedämmblockes mit dem Dichtungssteg treiben will, was auch möglich ist, im Bereich des Endrandes zwischen Wärmedämmblock und Dichtsteg vorteilhaft eine weitere Dichtung angeordnet, mit der auch der sich ergebende, im Querschnitt konische Spalt zwischen dem Block und Dichtsteg abgeschirmt wird, wodurch eine genaue Formanpassung von Dichtsteg und Dämmblock entbehrlich ist. Hierfür kann problemlos bspw. beim Ausformen des Wärmedämmblockes eine Umfangsstufe in den Wärmedämmblock eingeformt werden, die zusammen mit dem Dichtsteg eine Nut bildet, in die die weitere Dichtung eingelegt werden kann, die aus dem gleichen Material wie der Wärmedämmblock besteht, aber als Schnur ausgebildet ist. Als Material kommt dafür bspw. keramisches Fasermaterial mit hoher Temperaturfestigkeit in Frage. Für die andere, an der Kesselwand sitzende Dichtung wird eine geflochtene Asbestschnur oder ein anderes geeignetes Dichtungsmaterial vorgesehen.This inventive design of the boiler housing in the area of the front wall or the closure cover is practical table no longer available for the heating gases gap and also the new design of this sealing area is associated with the further advantage that the cover plate an additional by the insulating block sealing web, which sits in the closed position on the front wall directly arranged seal, the cover plate Stiffness experienced and thereby receives great stability and torsional stiffness, which is important for such cover plates or boiler lock doors. Since the insulating blocks are shaped as shaped pieces, it is inevitable that their peripheral flank surface must have a certain conicity in order to be able to form the shaped piece. In view of this, if you do not want to drive the effort of tightly enclosing the thermal insulation block with the sealing web, which is also possible, another seal is advantageously arranged in the region of the end edge between the thermal insulation block and the sealing web, with which the resulting cross-sectionally conical The gap between the block and sealing web is shielded, which means that there is no need for an exact adaptation of the shape of the sealing web and insulation block. This may for example easily. When forming the W ärmedämmblockes a circumferential step in the heat insulating block are formed, which forms a groove together with the sealing web, in which the further seal can be inserted, which consists of the same material as the heat insulating block, but constructed as a cord is. For example, ceramic fiber material with high temperature resistance can be used as the material. A braided asbestos cord or another suitable sealing material is provided for the other seal that sits on the boiler wall.

Sofern die Vorderwand des betreffenden Heizkesselgehäuses zwei oder mehr Öffnungen aufweist, steht natürlich nichts entgegen, an einer Deckelplatte entsprechend der Anzahl der in der Vorderwand angeordneten Öffnungen eine entsprechende Anzahl von Wärmedämmblöcken und Dichtungsstegen anzuordpen.If the front wall of the boiler housing in question has two or more openings, there is of course nothing to prevent a corresponding number of thermal insulation blocks and sealing webs from being arranged on a cover plate in accordance with the number of openings arranged in the front wall.

Das erfindungsgemäße Heizkesselgehäuse wird nachfolgend anhand der zeichnerischen Darstellung von Ausführungsbeispielen näher erläutert.The boiler housing according to the invention is described below the graphic representation of exemplary embodiments explained in more detail.

Es zeigt schematisch

  • Fig. 1 einen Teilschnitt durch das Heizkesselgehäuse im Bereich der Vorderwand;
  • Fig. 2 einen Schnitt durch die Deckelplatte, mit der gleichzeitig zwei Öffnungen des Heizkesselgehäuses verschlossen sind und
  • Fig. 3 eine Ansicht der Deckelplatte gemäß Fig. 2 in Pfeilrichtung A.
It shows schematically
  • F ig. 1 shows a partial section through the boiler housing in the region of the front wall;
  • F ig. 2 shows a section through the cover plate, with which two openings of the boiler housing are closed at the same time, and
  • 3 shows a view of the cover plate according to FIG. 2 in the direction of arrow A.

Wie aus Fig. 1 erkennbar, ist die Vorderwand 5 des Heizkesselgehäuses, von dem hier nur die interessierende Vorderwand dargestellt ist, mit einem Verschlußdeckel versehen, der aus einer Deckelplatte 1 mit innenseitig angeordnetem, in eine Vorderwandöffnung 6 einragenden Wärmedämmblock 2 gebildet ist. An der Deckelplatte 1 ist ein die Flanken 12 des Wärmedämmblockes 2 umfassender Dichtsteg 3 angeordnet, der mit seinem Endrand 4 gegen die an der Vorderwand 5 angeordnete, die Vorderwandöffnung 6 umgebende Dichtung 7 gedrückt ist. Die Elemente zum Anschlagen bzw. Fixieren des Verschlußdeckels an der Vorderwand 5 sind nicht dargestellt. Wesentlich ist also bei dieser Ausbildung, daß der Wärmedämmblock 2 weitgehend mit seiner ganzen Höhe innerhalb des kreisförmig ausgebildeten Dichtsteges 3 sitzt und zwar in Weiterbildung vorteilhaft mit einer weiteren Dichtung 8 in bezug auf den Dichtsteg 3 selbst abgedichtet, um damit den konischen Spalt zwischen Wärmedämmblock 2 und Dichtsteg 3 ebenfalls abzublenden. Durch diese Ausbildung sitzt also die für die Gesamtabdichtung wesentliche Dichtung 7 nicht mehr wie bisher an der Deckelplatte 1 selbst, sondern in relativ großer Distanz zu dieser unmittelbar an der Vorderwand 5 selbst, die zweckmäßig einen Vorderwandöffnungsrand 9 aufweist und einen umfangsgrößeren Vorderwandöffnungssteg 10, der durchaus in bezug auf die räumliche Gesamtanordnung die dargestellte Breite B haben kann.As can be seen from Fig. 1, the front wall 5 of the boiler housing, of which only the front wall of interest is shown here, is provided with a sealing cover, which is formed from a cover plate 1 with a heat insulating block 2 arranged on the inside and protruding into a front wall opening 6. Arranged on the cover plate 1 is a sealing web 3 which encompasses the flanks 12 of the thermal insulation block 2 and is pressed with its end edge 4 against the seal 7 arranged on the front wall 5 and surrounding the front wall opening 6. The elements for attaching or fixing the closure cover to the front wall 5 are not shown. It is therefore essential in this design that the thermal insulation block 2 is largely seated with its entire height within the circular sealing web 3, and in a further development is advantageously sealed with a further seal 8 with respect to the sealing web 3 itself, in order thereby to remove the conical gap between the thermal insulation block 2 and also seal off sealing web 3. With this design, the seal 7 essential for the overall seal is no longer seated on the cover plate 1 itself as before, but rather at a relatively large distance from it directly on the front wall 5 itself, which expediently has a front wall opening edge 9 and a larger front wall opening web 10, which is quite with respect to the overall spatial arrangement can have the width B shown.

Für die Unterbringung der weiteren Dichtung 8 ist im Wärmedämmblock 2 eine Umfangsstufe 11 von vornherein eingeformt, die, wie erkennbar, mit dem Dichtsteg 3 eine Ringnut bildet, in der die Dichtung 8 als weitere Abdichtung angeordnet ist.To accommodate the additional seal 8, a circumferential step 11 is formed in the thermal insulation block 2 from the outset, which, as can be seen, forms an annular groove with the sealing web 3, in which the seal 8 is arranged as a further seal.

Bei der Vorderwandöffnung 6 in Fig. 1 handelt es sich bspw. um die Brennkammeröffnung des Heizkesselgehäuses. Demgegenüber ist in den Fig. 2, 3 ein Verschlußdeckel dargestellt und eine Vorderwand 5 eines Heizkesselgehäuses, die zwei Vorderwandöffnungen 6 aufweist, wobei es sich bei der unteren Öffnung um die Brennkammeröffnung und bei der oberen Öffnung um eine Reinigungsöffnung handelt. Wie erkennbar, ist in diesem Falle die rechteckige Deckelplatte 1 mit zwei entsprechenden Wärmedämmblöcken 2 und zwei diese Dämmblöcke umgebenden Dichtstegen 3 versehen, wobei aber für jeden Öffnungsverschluß das gleiche Ausbildungsprinzip verwirklicht ist, wie zu Fig. 1 beschrieben.The front wall opening 6 in FIG. 1 is, for example, the combustion chamber opening of the boiler housing. In contrast, a closure cover is shown in FIGS. 2, 3 and a front wall 5 of a boiler housing which has two front wall openings 6, the lower opening being the combustion chamber opening and the upper opening being a cleaning opening. As can be seen, in this case the rectangular cover plate 1 is provided with two corresponding heat insulation blocks 2 and two sealing webs 3 surrounding these insulation blocks, but the same design principle being implemented for each opening closure as described for FIG. 1.

Die beschriebene Deckelplattenkonstruktion hat natürlich auch den Vorteil, daß der Wärmedämmblock 2 weitgehend vor Beschädigungen geschützt ist.The cover plate construction described also has the advantage, of course, that the thermal insulation block 2 is largely protected from damage.

Claims (6)

1. Heizkesselgehäuse, dessen Vorderwand mit einem Verschlußdeckel versehen ist, der aus einer Deckelplatte mit innenseitig angeordnetem, in eine Vorderwandöffnung einragendem Wärmedämmblock gebildet und zwischen Vorderwand und Deckelplatte eine Dichtung angeordnet ist, dadurch gekennzeichnet, daß an der Deckelplatte (1) ein den Wärmedämmblock (2) an seinen Flanken (12) dicht umfassender oder gegen den Wärmedämmblock (2) zusätzlich abgedichteter Dichtsteg (3) angeordnet und dieser mit seinem Endrand (4) gegen die an der Vorderwand (5) angeordnete, die Vorderwandöffnung (6) umgebende Dichtung (7) gelegt ist.1. Boiler housing, the front wall of which is provided with a sealing cover, which is formed from a cover plate with an inside, protruding into a front wall opening, and a seal is arranged between the front wall and cover plate, characterized in that a heat insulation block on the cover plate (1) 2) sealing flanges (3) are arranged on its flanks (12) or are sealingly sealed against the thermal insulation block (2), and the end edge (4) of the sealing web (4) against the seal (6) arranged on the front wall (5) and surrounding the front wall opening (6) 7) is laid. 2. Heizkesselgehäuse nach Anspruch 1, dadurch gekennzeichnet, daß im Bereich des Endrandes (4) zwischen Wärmedämmblock (2) und Dichtungssteg (3) eine weitere Dichtung (8) als zusätzliche Abdichtung angeordnet ist.2. Boiler housing according to claim 1, characterized in that a further seal (8) is arranged as an additional seal in the region of the end edge (4) between the heat insulation block (2) and the sealing web (3). 3. Heizkesselgehäuse nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die an der Vorderwand (5) angeordnete Dichtung (7) zwischen einem Vorderwandöffnungsrand (9) und einem umfangsgrößeren Vorderwandöffnungssteg (10) angeordnet ist.3. Boiler housing according to claim 1 or 2, characterized in that the on the front wall (5) arranged seal (7) between a front wall opening edge (9) and a circumferentially larger front wall opening web (10) is arranged. 4. Heizkesselgehäuse nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die weitere Dichtung (8) in einer Umfangsstufe (11) des Wärmedämmblockes (2) angeordnet ist.4. H eizkesselgehäuse according to claim 2 or 3, characterized in that the further seal (8) is arranged in a circumferential stage (11) of the heat insulating block (2). 5. Heizkesselgehäuse nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß an der Deckelplatte (1) entsprechend der Anzahl der in der Vorderwand (5) angeordneten Öffnung (6) eine entsprechende Anzahl von Wärmedämmblöcken (2) und Dichtungsstegen (3) angeordnet ist.5. Boiler housing according to one of claims 1 to 4, characterized in that on the cover plate (1) corresponding to the number of in the front wall (5) arranged opening (6), a corresponding number of heat insulation blocks (2) and sealing webs (3) are arranged is. 6. Heizkesselgehäuse nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß der Vorderwandöffnungssteg (10) mit einer größeren Breite (B) als der des Vorderwandöffnungsrandes (9) versehen ist.6. Boiler housing according to one of claims 3 to 5, characterized in that the front wall opening web (10) is provided with a greater width (B) than that of the front wall opening edge (9).
EP85110596A 1984-09-03 1985-08-23 Heating boiler casing Expired - Lifetime EP0173923B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110596T ATE60945T1 (en) 1984-09-03 1985-08-23 BOILER HOUSING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8425948U 1984-09-03
DE19848425948U DE8425948U1 (en) 1984-09-03 1984-09-03 BOILER HOUSING

Publications (3)

Publication Number Publication Date
EP0173923A2 true EP0173923A2 (en) 1986-03-12
EP0173923A3 EP0173923A3 (en) 1987-12-16
EP0173923B1 EP0173923B1 (en) 1991-02-20

Family

ID=6770343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110596A Expired - Lifetime EP0173923B1 (en) 1984-09-03 1985-08-23 Heating boiler casing

Country Status (4)

Country Link
EP (1) EP0173923B1 (en)
AT (1) ATE60945T1 (en)
DE (2) DE8425948U1 (en)
DK (1) DK383085A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408807B (en) * 1998-02-03 2002-03-25 Vaillant Gmbh COVER DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015840U1 (en) * 1990-11-20 1992-03-19 Vießmann, Hans, Dr., 3559 Battenberg Boiler locking door

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962211U (en) * 1967-03-23 1967-06-15 Buderus Eisenwerk BOILER DOOR.
DE1913481A1 (en) * 1968-05-16 1969-11-20 Balas Collet Company Hydraulic clamping device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1962211U (en) * 1967-03-23 1967-06-15 Buderus Eisenwerk BOILER DOOR.
DE1913481A1 (en) * 1968-05-16 1969-11-20 Balas Collet Company Hydraulic clamping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408807B (en) * 1998-02-03 2002-03-25 Vaillant Gmbh COVER DEVICE

Also Published As

Publication number Publication date
EP0173923B1 (en) 1991-02-20
DK383085A (en) 1986-03-04
DE8425948U1 (en) 1984-11-22
DE3581771D1 (en) 1991-03-28
ATE60945T1 (en) 1991-03-15
DK383085D0 (en) 1985-08-23
EP0173923A3 (en) 1987-12-16

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