EP0173923B1 - Heating boiler casing - Google Patents

Heating boiler casing Download PDF

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Publication number
EP0173923B1
EP0173923B1 EP85110596A EP85110596A EP0173923B1 EP 0173923 B1 EP0173923 B1 EP 0173923B1 EP 85110596 A EP85110596 A EP 85110596A EP 85110596 A EP85110596 A EP 85110596A EP 0173923 B1 EP0173923 B1 EP 0173923B1
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EP
European Patent Office
Prior art keywords
front wall
opening
seal
heat
insulating block
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
Application number
EP85110596A
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German (de)
French (fr)
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EP0173923A2 (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
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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 the firing opening of which is closed by a door leaf
  • the door leaf is sealed by a relatively high frame welded to the front wall of the boiler, which presses against an asbestos cord arranged on the door leaf, which is arranged there between the thermal insulation block and a small limiting web.
  • This known embodiment allows the exhaust gases to reach the welded-on 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 door leaf is exposed to the risk of damage since it is practically free.
  • a boiler door is known with which the sealing and heat insulation are to be improved.
  • the door leaf consists of two interlocking shells which are kept at a distance by means of spacer cams or insulating material, and the boiler-side gap is sealed with one or more sealing cords, which interact with sealing strips on the door frame.
  • the bowls are in the area a door lock firmly connected.
  • this connecting door lock represents a thermal bridge, the desired improvement can only be achieved with an extremely complex two-shell construction.
  • the situation is similar with a boiler door according to DE-U-1 913 481, which is also constructed in a complex manner and in which the surface or sealing webs on the housing simply rest on the opening edge of the front wall of the housing.
  • these known closures they cannot be used without complete redesign if the thermal insulation is designed on the inside as a thermal insulation block, which also partially protrudes into the front wall opening.
  • the invention is accordingly based on the object of designing a boiler housing of the generic type 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.
  • 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 the sealing web is shielded, which means that the shape of the sealing web and insulation block can be eliminated.
  • a circumferential step can be easily formed in the thermal insulation block, for example when the thermal insulation block is being formed, which together with the sealing web forms a groove into which the further seal can be inserted, which is made of the same material as the thermal insulation block but is designed as a cord .
  • 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.
  • 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 heat insulation blocks and sealing webs from being arranged on a door leaf in accordance with the number of openings arranged in the front wall.
  • the front wall 5 of the boiler housing is provided with a closure which is formed from a door leaf 1 with an inside heat barrier block 2 projecting into a front wall opening 6.
  • a sealing web 3 comprising the flanks 12 of the thermal insulation block 2, the end edge 4 of which is pressed 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 to thereby remove the conical gap between the thermal insulation block 2 and to also seal off sealing web 3.
  • the seal 7, which is essential for the overall seal is no longer seated on the door leaf 1 itself, 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 entirely in 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. 2, 3 shows a door leaf 1 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 door leaf 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 described door leaf construction naturally also has the advantage 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)
  • Thermal Insulation (AREA)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
  • Cookers (AREA)
  • Special Wing (AREA)
  • Gasket Seals (AREA)
  • Details Of Valves (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (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 Ober-begriff des Hauptanspruches.The invention relates to a boiler housing according to the preamble of the main claim.

Heizkesselgehäuse, deren Feuerungsöffnung mit einem Türblatt verschlossen ist, sind allgemein bekannt. Bei diesen bekannten Heizkesselgehäusen erfolgt die Abdichtung des Türblattes durch einen an der Kesselvorderwand angeschweißten, relativ hohen Rahmen, der gegen eine am Türblatt angeordnete Asbestschnur drückt, die dort zwischen dem Wäremdämmblock und einem kleinen Begrenzungs-steg angeordnet ist. ßei 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 am Türblatt sitzende Wärmedämmblock ist, da er praktisch freisteht, der Beschädigungsgefahr ausgesetzt.Boiler housings, the firing opening of which is closed by a door leaf, are generally known. In these known boiler housings, the door leaf is sealed by a relatively high frame welded to the front wall of the boiler, which presses against an asbestos cord arranged on the door leaf, which is arranged there between the thermal insulation block and a small limiting web. This known embodiment allows the exhaust gases to reach the welded-on 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 door leaf is exposed to the risk of damage since it is practically free.

Nach der DE-U- 1 962 211 ist eine Heizkesseltür bekannt, mit der die Abdichtung und Wärmeisolierung verbessert werden sollen. Hierfür besteht das Türblatt aus zwei ineinander gefügten Schalen, die mittels Abstandsnocken oder Isoliermaterial auf Distanz gehalten werden, und wobei der kesselseitige Spalt mit einer oder mehreren Dichtungsschnüren abgedichtet ist, die mit Dichtleisten am Türrahmen zusammenwirken. Die Schalen sind dabei im Bereich einer Türverriegelung fest miteinander verbunden. Abgesehen davon, daß diese verbindende Türverriegelung eine Wärmeleitbrücke darstellt, ist die angestrebte Verbesserung nur mit einer außerordentlich aufwendigen zweischaligen Konstruktion erreichbar. Ähnlich verhält es sich mit einer Heizkesseltür gemäß DE-U-1 913 481, die ebenso aufwendig konstruiert ist und bei der sich die gehäuseseitige Fläche oder Dichtungsstege einfach auf den Öffnungsrand der Gehäusevorderwand auflegen. Abgesehen von der aufwendigen Bauweise dieser vorbekannten Verschlüsse, können diese nicht ohne völlige Umkonstruktion angewendet werden, wenn die Wärmeisolation innenseitig als Wärmedämmblock ausgebildet ist, der zudem noch zum Teil in die Vorderwandöffnung einragt.According to DE-U-1 962 211, a boiler door is known with which the sealing and heat insulation are to be improved. For this purpose, the door leaf consists of two interlocking shells which are kept at a distance by means of spacer cams or insulating material, and the boiler-side gap is sealed with one or more sealing cords, which interact with sealing strips on the door frame. The bowls are in the area a door lock firmly connected. Apart from the fact that this connecting door lock represents a thermal bridge, the desired improvement can only be achieved with an extremely complex two-shell construction. The situation is similar with a boiler door according to DE-U-1 913 481, which is also constructed in a complex manner and in which the surface or sealing webs on the housing simply rest on the opening edge of the front wall of the housing. Apart from the complex construction of these known closures, they cannot be used without complete redesign if the thermal insulation is designed on the inside as a thermal insulation block, which also partially protrudes into the front wall opening.

Der Erfindung liegt demgemäß die Aufgabe zugrunde, ein Heizkesselgehäuse der gattungsgemäßen Art im Vorderwandbereich derart auszubilden, daß die Abgase vom kritischen Abdichtungsbereich ferngehalten und dadurch Kondensatbildung und Wärmeabstrahlung in diesen Bereich weitestgehend unterbunden werden mit der Maßgabe, den Wärmedämmblock weitgehend gegen Beschädigungen zu sichern.The invention is accordingly based on the object of designing a boiler housing of the generic type 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 gattungsgemäßen 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 generic type 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 Verschlusses ist prak tisch 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 Dichtungsteg, der sich in Schließ stellung auf die an der Vorderwand unmittelbar selbst angeordnete Dichtung aufsetzt, das Türblatt eine zusätzliche Aussteifung erfährt und dadurch eine große Stabilität und Verwindungssteifheit erhält, was für derartige Türblätter 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 ungs Spalt zwischen dem Block und Dichtungsteg abgeschirmt wird, wodurch eine genaue Formanpassung von Dichtungsteg und Dämmblock entbehrlich ist. Hierfür kann problemlos bspw. beim Ausformen des Wärmedämmblockes eine Umfangsstufe in den Wärmedämmblock eingeformt werden, die zusammen mit dem Dichtungsteg 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 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 through the thermal insulation block sealing web, which sits in the closed position on the seal arranged directly on the front wall, the door leaf one experiences additional stiffening and thereby receives great stability and torsional rigidity, which is important for such door leaves 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 the sealing web is shielded, which means that the shape of the sealing web and insulation block can be eliminated. For this purpose, a circumferential step can be easily formed in the thermal insulation block, for example when the thermal insulation block is being formed, which together with the sealing web forms a groove into which the further seal can be inserted, which is made of the same material as the thermal insulation block but is designed as a cord . 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 einem Türblatt entsprechend der Anzahl der in der Vorderwand angeordneten Öffnungen eine entsprechende Anzahl von Wärmedämmblöcken und Dichtungsstegen anzuordnen.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 heat insulation blocks and sealing webs from being arranged on a door leaf 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 das Türblatt , mit dem gleichzeitig zwei Öffnungen des Heizkesselgehäuses verschlossen sind und
  • Fig. 3 eine Ansicht des Türblattes gemäß Fig. 2 in Pfeilrichtung A.
It shows schematically
  • 1 shows a partial section through the boiler housing in the region of the front wall.
  • Fig. 2 shows a section through the door leaf, with which two openings of the boiler housing are closed at the same time and
  • 3 shows a view of the door leaf 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 Verschluß versehen, der aus ei-nem Türblatt 1 mit innenseitig angeordnetem, in eine Vorderwandöffnung 6 einragenden Wärmedämmblock 2 gebildet ist. Am Türblatt 1 ist ein die Flanken 12 des Wärmedämmblockes 2 umfassender Dichtungsteg 3 angeordnet, der mit seinem Endrand 4 gegen die an der Vorderwand 5 angeordnete, die Vor-derwandöffnung 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 Dichtungsteges 3 sitzt und zwar in Weiterbildung vorteilhaft mit einer weiteren Dichtung 8 in bezug auf den Dichtungsteg 3 selbst abgedichtet, um damit den konischen Spalt zwischen Wärmedämmblock 2 und Dichtungsteg 3 ebenfalls abzublenden. Durch diese Ausbildung sitzt also die für die Gesamtabdichtung wesentliche Dichtung 7 nicht mehr wie bisher am Türblatt 1 selbst, sondern in relativ großer Distanz zu diesem 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. Für die Unterbringung der weiteren Dichtung 8 ist im Wärmedämmblock 2 eine Umfangsstufe 11 von vornherein eingeformt, die, wie erkennbar, mit dem Dichtungsteg 3 eine Ringnut bildet, in der die Dichtung 8 als weitere Abdichtung angeordnet ist.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 closure which is formed from a door leaf 1 with an inside heat barrier block 2 projecting into a front wall opening 6. Arranged on the door leaf 1 is a sealing web 3 comprising the flanks 12 of the thermal insulation block 2, the end edge 4 of which is pressed 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 to thereby remove the conical gap between the thermal insulation block 2 and to also seal off sealing web 3. With this design, the seal 7, which is essential for the overall seal, is no longer seated on the door leaf 1 itself, 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 entirely in with respect to the overall spatial arrangement can have the width B shown. For accommodating 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 Türblatt 1 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 das rechteckige .Türblatt 1 mit zwei entsprechenden Wärmedämmblöcken 2 und zwei diese Dämmblöcke umgebenden Dichtungsstegen 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. 2, 3 shows a door leaf 1 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 door leaf 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 Türblattkonstruktion hat natürlich auch den Vorteil, daß der Wärmedämmblock 2 weitgehend vor Beschädigungen geschützt ist.The described door leaf construction naturally also has the advantage that the thermal insulation block 2 is largely protected from damage.

Claims (4)

  1. Boiler housing, of which at least one front wall opening is provided with a closure formed by a door flap (1) having a heat insulating block (2) mounted on the inside, said block being surrounded by a strap (3), whilst between the front wall (5) and the door flap (1) there is provided a seal (7), characterised in that, between the heat insulating block (2) projecting into the opening in the front wall (5), in the region of the terminal edge (4) of the strap (3), located in a circumferential step (11) of the heat insulating block (2), and the strap (3), a seal (8) is mounted and the strap (3) is positioned with its terminal edge (4) placed against a seal (7) provided on the front wall (5) and surrounding the opening (6) in the front wall.
  2. Boiler housing according to claim 1, characterised in that the seal (7) provided on the front wall (5) is arranged between an edge (9) of the opening in the front wall and a strap (10) of the opening in the front wall, which is larger in circumference.
  3. Boiler housing according to claim 2, characterised in that the strap (10) of the opening in the front wall has a greater width (B) than that of the edge (9) of the opening in the front wall.
  4. Boiler housing according to one of claims 1 to 3, characterised in that a number of heat insulating blocks (2) and sealing straps (3), corresponding to the number of openings (6) provided in the front wall (5), are arranged on the door flap (1).
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
DE19848425948U DE8425948U1 (en) 1984-09-03 1984-09-03 BOILER HOUSING
DE8425948U 1984-09-03

Publications (3)

Publication Number Publication Date
EP0173923A2 EP0173923A2 (en) 1986-03-12
EP0173923A3 EP0173923A3 (en) 1987-12-16
EP0173923B1 true 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
AT399570B (en) * 1990-11-20 1995-06-26 Viessmann Hans BOILER LOCKING DOOR

Families Citing this family (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

Family Cites Families (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.
US3516681A (en) * 1968-05-16 1970-06-23 Balas Collet Co Hydraulic chuck or arbor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399570B (en) * 1990-11-20 1995-06-26 Viessmann Hans BOILER LOCKING DOOR

Also Published As

Publication number Publication date
EP0173923A2 (en) 1986-03-12
DE8425948U1 (en) 1984-11-22
DE3581771D1 (en) 1991-03-28
DK383085D0 (en) 1985-08-23
EP0173923A3 (en) 1987-12-16
DK383085A (en) 1986-03-04
ATE60945T1 (en) 1991-03-15

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