EP0233509A1 - Mounting device for a monolithic catalyst - Google Patents

Mounting device for a monolithic catalyst Download PDF

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Publication number
EP0233509A1
EP0233509A1 EP87100966A EP87100966A EP0233509A1 EP 0233509 A1 EP0233509 A1 EP 0233509A1 EP 87100966 A EP87100966 A EP 87100966A EP 87100966 A EP87100966 A EP 87100966A EP 0233509 A1 EP0233509 A1 EP 0233509A1
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EP
European Patent Office
Prior art keywords
catalyst element
buffer sleeve
face
catalyst
frame
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
EP87100966A
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German (de)
French (fr)
Other versions
EP0233509B1 (en
Inventor
Reinhold Dr. Brand
Bernd Dr. Engler
Peter Kleine-Möllhoff
Edgar. Dr. Koberstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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Filing date
Publication date
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to AT87100966T priority Critical patent/ATE41204T1/en
Publication of EP0233509A1 publication Critical patent/EP0233509A1/en
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Publication of EP0233509B1 publication Critical patent/EP0233509B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/06—Fitting ceramic monoliths in a metallic housing with means preventing gas flow by-pass or leakage

Definitions

  • the innovation relates to a device for holding square, z. B. square or rectangular monolithic ceramic catalyst elements to reduce pollutant emissions from combustion plants, for. B. combustion plants for thermal power plants, and to combine such catalyst elements into a package.
  • Ceramic monoliths require secure and shock-absorbing fastening because of their risk of breakage under extreme operating conditions (vibrations, pressure surges, temperature changes). Since they can not be produced in any size, there is still the need to combine several elements in a battery to the z. B. in power plant emissions per unit of time flowing large gas volumes.
  • the buffer sleeve can e.g. B. consist of mineral fiber, ceramic fiber, wire mesh or other temperature-resistant elastic materials. After it has been pushed onto the monolith from its end face (s), the metal frame is pushed over the sleeve, whereby the elastic sleeve can be compressed. This compression can also be achieved or reinforced by a sleeve material that expands once when heated. Such a material is e.g. B. a so-called expanded mica mat, as z. B. is sold by the company 3M under the name INTERAM®.
  • the required heat treatment can be carried out after installation or only in operation by exposure to hot exhaust gases, e.g. B. a hot flue gas can be made.
  • the frame is provided on one end face with securing stops which engage around the end face of the catalyst and thus prevent axial displacement of the catalyst element by positive locking.
  • the metal frame on its end face projects inwards with the formation of a continuous stop or a stop divided into a plurality of “tongues” for an edge zone of the end face of the catalyst element.
  • the combination of buffer sleeve and metal frame can therefore be provided for attachment to at least one end section of the catalyst element.
  • the left designed as an exploded drawing, shows a 1 m long monolithic ceramic catalyst element 1 of square cross-section (edge length 150 mm), which is traversed over its entire length by numerous square flow channels, in which the exhaust gas to be treated flows and comes into contact with the catalyst .
  • This can be a material component of the element or can be present as a coating on the ceramic material of the element.
  • a 3 cm long buffer sleeve 2 made of elastic wire mesh with a slightly smaller free inner cross-section than the end face of the monolith (149 mm ⁇ 149 mm) is forced onto the latter in such a way that its outer end face ends flush with the end face of the monolith.
  • a 3 cm deep frame 3 made of temperature-resistant steel corresponds to the outer shape of the monolith and sleeve and has a slightly smaller inner free cross-section than the sum of the end faces of the catalyst element and buffer sleeve (158 mm ⁇ 158 mm). It is provided on two adjacent side surfaces with rectangular recesses 4 in a matching shape and arrangement (dimensions 10 mm ⁇ 100 mm). The two remaining side surfaces are provided with rectangular projections 5, which can positively engage in the above-described recesses in adjacent frames of a package of held catalyst elements.
  • material V2A temperature-resistant steel
  • a stop plate 6 Attached to the outer edge of the metal frame is a stop plate 6 protruding 6 mm inwards perpendicularly to the side surface and supporting the edge zone of the monolith end face.
  • the frame is forced over the buffer sleeve during assembly and pushed onto it until the stop plates come into contact with the monolith face.
  • the monolith provided with the holding device at both ends can then be put together with other equally equipped monoliths via the tongue and groove connection 4/5 to form a catalyst package.
  • FIG. 2 shows the projection views onto the catalytic converter element 1, a buffer sleeve 2 and onto a frame 3.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Crushing And Grinding (AREA)

Abstract

A device for the support of ceramic catalyst monoliths especially of square cross section as well as for the combination of several of such monoliths into one package. It is formed of an elastic gasket attached on one or both monolith ends and a metal frame attached on the gasket under pressure. The frame has recesses on two adjacent lateral surfaces, and at the two opposite lateral surfaces it has projections which can engage interlockingly into the recesses of adjacent frames.

Description

Die Neuerung betrifft eine Vorrichtung zur Halterung von viereckigen, z. B. quadratischen oder rechteckigen mono­lithischen keramischen Katalysatorelementen zur Herab­setzung des Schadstoffausstoßes von Verbrennungsanlagen, z. B. Feuerungsanlagen für Wärmekraftwerke, sowie zur Zusammenfassung solcher Katalysatorelemente zu einem Paket.The innovation relates to a device for holding square, z. B. square or rectangular monolithic ceramic catalyst elements to reduce pollutant emissions from combustion plants, for. B. combustion plants for thermal power plants, and to combine such catalyst elements into a package.

Keramische Monolithen erfordern wegen ihrer Bruchgefähr­dung unter extremen Betriebsbedingungen (Erschütterungen, Druckstöße, Temperaturwechsel) eine sichere und stoßab­sorbierende Befestigung. Da sie nicht in beliebiger Größe herstellbar sind, besteht weiterhin die Notwendigkeit, mehrere Elemente in einer Batterie zusammenzufassen, um die z. B. bei Kraftwerksabgasen pro Zeiteinheit strömen­den großen Gasvolumina durchsetzen zu können.Ceramic monoliths require secure and shock-absorbing fastening because of their risk of breakage under extreme operating conditions (vibrations, pressure surges, temperature changes). Since they can not be produced in any size, there is still the need to combine several elements in a battery to the z. B. in power plant emissions per unit of time flowing large gas volumes.

Gemäß der Neuerung ist eine Vorrichtung zur Halterung von zur Abgasnachbehandlung von Verbrennungsanlagen verwende­ten viereckigen monolithischen keramischen Katalysator­elementen sowie zur Zusammenfassung derselben zu einem Paket gekennzeichnet durch

  • a) eine der äußeren Form des Katalysatorelements ent­sprechende und formschlüssig auf dieses aufschiebbare elastische Puffermanschette
  • b) einen der äußeren Form von Katalysatorelement und Puffermanschette entsprechenden, die Puffermanschette umgreifenden Metallrahmen, dessen innerer freier Querschnitt größer als die Stirnfläche des Katalysa­torelements und kleiner als die Summe der Stirnflächen von Katalysatorelement und Puffermanschette oder gleich der Summe dieser Stirnflächen ist, wobei
  • c) die Rahmentiefe und die Länge der Puffermanschette mindestens 1/50 der Länge des Katalysatorelements entsprechen und
  • d) jeweils zwei benachbarte Seitenflächen des Rahmens in symmetrischer Anordnung Ausnehmungen bzw. nach innen springende Sicken aufweisen und die beiden übrigen Seitenflächen Vorsprünge aufweisen, die formschlüssig in die Ausnehmungen bzw. Sicken benachbarter Rahmen eingreifen können.
According to the innovation, a device for holding square monolithic ceramic catalyst elements used for exhaust gas aftertreatment of combustion systems and for combining them into a package is characterized by
  • a) one corresponding to the outer shape of the catalyst element and positively slidable on this elastic buffer sleeve
  • b) one corresponding to the outer shape of the catalyst element and the buffer sleeve, the buffer sleeve encompassing metal frame, the inner free cross section of which is larger than the end face of the catalyst element and smaller than the sum of the end faces of the catalyst element and the buffer sleeve or equal to the sum of these end faces, where
  • c) the frame depth and the length of the buffer sleeve correspond to at least 1/50 the length of the catalyst element and
  • d) each have two adjacent side surfaces of the frame in a symmetrical arrangement of recesses or inwardly projecting beads and the two other side surfaces have projections which can engage in a form-fitting manner in the recesses or beads of adjacent frames.

Die Puffermanschette kann z. B. aus Mineralfaser, Keramik­faser, Drahtgestrick oder anderen temperaturfesten elasti­schen Werkstoffen bestehen. Nachdem sie auf den Monolithen von dessen Stirnseite(n) her aufgeschoben ist, wird der Metallrahmen über die Manschette geschoben, wobei die elastische Manschette verdichtet werden kann. Diese Ver­dichtung kann auch durch ein Manschettenmaterial, welches sich bei Erwärmung einmalig ausdehnt, erreicht oder ver­stärkt werden. Ein solches Material ist z. B. eine sog. Blähglimmermatte, wie sie z. B. von der Firma 3M unter der Bezeichnung INTERAM® vertrieben wird. Die erforderliche Wärmebehandlung kann nach der Montage oder aber auch erst im Betrieb durch Beaufschlagung mit heißen Abgasen, z. B. ein heißes Rauchgas, vorgenommen werden.The buffer sleeve can e.g. B. consist of mineral fiber, ceramic fiber, wire mesh or other temperature-resistant elastic materials. After it has been pushed onto the monolith from its end face (s), the metal frame is pushed over the sleeve, whereby the elastic sleeve can be compressed. This compression can also be achieved or reinforced by a sleeve material that expands once when heated. Such a material is e.g. B. a so-called expanded mica mat, as z. B. is sold by the company 3M under the name INTERAM®. The required heat treatment can be carried out after installation or only in operation by exposure to hot exhaust gases, e.g. B. a hot flue gas can be made.

Soll der Katalysator Betriebsbedingungen ausgesetzt werden, denen die reibschlüssige Verbindung zwischen Monolith und Puffermanschette einerseits und Puffermanschette und Metallrahmen andererseits nicht gewachsen sein könnte, so wird der Rahmen an einer Stirnseite mit Sicherungsan­schlägen versehen, welche die Katalysatorstirnfläche am Rand umgreifen und damit durch Formschluß eine axiale Verschiebung des Katalysatorelements verhindern.If the catalytic converter is to be exposed to operating conditions to which the frictional connection between the monolith and the buffer sleeve on the one hand and the buffer sleeve and Metal frame, on the other hand, could not have grown, the frame is provided on one end face with securing stops which engage around the end face of the catalyst and thus prevent axial displacement of the catalyst element by positive locking.

Gemäß einer vorteilhaften Ausführungsform der Neuerung springt also der Metallrahmen an seiner Stirnseite nach innen unter Ausbildung eines durchgehenden oder in mehrere "Zungen" aufgeteilten Anschlags für eine Randzone der Stirnfläche des Katalysatorelements vor.According to an advantageous embodiment of the innovation, the metal frame on its end face projects inwards with the formation of a continuous stop or a stop divided into a plurality of “tongues” for an edge zone of the end face of the catalyst element.

Bei vertikal stehenden kürzeren Katalysatorelementen genügt es oft schon, das Katalysatorelement nur in seinem unteren Abschnitt zu haltern. Bei längeren Elementen, stärkerer Beanspruchung oder horizontaler Anbringung der Elemente ist jedoch eine beidseitige Halterung ratsam.With shorter, vertically positioned catalytic converter elements, it is often sufficient to hold the catalytic converter element only in its lower section. In the case of longer elements, greater stress or horizontal installation of the elements, a bracket on both sides is advisable.

Gemäß der Neuerung kann also die Kombination aus Puffer­manschette und Metallrahmen für eine Anbringung an min­destens einem Endabschnitt des Katalysatorelements vor­gesehen sein.According to the innovation, the combination of buffer sleeve and metal frame can therefore be provided for attachment to at least one end section of the catalyst element.

Die Neuerung wird nachfolgend anhand einer vorteilhaften Ausführungsvariante in Verbindung mit der einzigen Figur der Zeichnung weiter erläutert.The innovation is explained further below using an advantageous embodiment in conjunction with the single figure of the drawing.

Die linke als Explosionszeichnung gestaltete Figur 1 zeigt ein 1 m langes monolithisches keramisches Katalysatorelement 1 von quadratischem Querschnitt (Kantenlänge 150 mm), welches über seine Gesamtlänge von zahlreichen quadrati­schen Strömungskanälen durchzogen wird, in welchen das zu behandelnde Abgas strömt und mit dem Katalysator in Berührung kommt. Dieser kann stofflicher Bestandteil des Elements sein oder auf dem keramischen Werkstoff des Elements als Beschichtung vorliegen.The left, designed as an exploded drawing, shows a 1 m long monolithic ceramic catalyst element 1 of square cross-section (edge length 150 mm), which is traversed over its entire length by numerous square flow channels, in which the exhaust gas to be treated flows and comes into contact with the catalyst . This can be a material component of the element or can be present as a coating on the ceramic material of the element.

Eine 3 cm lange Puffermanschette 2 aus elastischem Draht­gestrick mit geringfügig kleinerem freien inneren Quer­schnitt als die Stirnfläche des Monolithen (149 mm × 149 mm) wird auf letzteren so aufgezwängt, daß ihre äußere Stirn­fläche bündig mit der Stirnfläche des Monolithen endigt.A 3 cm long buffer sleeve 2 made of elastic wire mesh with a slightly smaller free inner cross-section than the end face of the monolith (149 mm × 149 mm) is forced onto the latter in such a way that its outer end face ends flush with the end face of the monolith.

Ein 3 cm tiefer Rahmen 3 aus temperaturfestem Stahl (z.B. Werkstoff V2A) entspricht der äußeren Form von Monolith und Manschette und hat einen etwas geringeren inneren freien Querschnitt als die Summe der Stirnflächen von Katalysatorelement und Puffermanschette (158 mm × 158 mm). Er ist an zwei benachbarten Seitenflächen mit rechteckigen Ausnehmungen 4 in übereinstimmender Form und Anordnung versehen (Abmessung 10 mm × 100 mm). Die beiden übrigen Seitenflächen sind mit rechteckigen Vorsprüngen 5 ver­sehen, die formschlüssig in die oben beschriebenen Aus­nehmungen benachbarter Rahmen eines Pakets gehalterter Katalysatorelemente eingreifen können.A 3 cm deep frame 3 made of temperature-resistant steel (e.g. material V2A) corresponds to the outer shape of the monolith and sleeve and has a slightly smaller inner free cross-section than the sum of the end faces of the catalyst element and buffer sleeve (158 mm × 158 mm). It is provided on two adjacent side surfaces with rectangular recesses 4 in a matching shape and arrangement (dimensions 10 mm × 100 mm). The two remaining side surfaces are provided with rectangular projections 5, which can positively engage in the above-described recesses in adjacent frames of a package of held catalyst elements.

Am äußeren Rand des Metallrahmens ist pro Rahmenseite jeweils ein senkrecht zur Seitenfläche 6 mm nach innen ragendes und die Randzone der Monolithstirnfläche stüt­zendes Anschlagblech 6 angebracht.Attached to the outer edge of the metal frame is a stop plate 6 protruding 6 mm inwards perpendicularly to the side surface and supporting the edge zone of the monolith end face.

Der Rahmen wird bei der Montage über die Puffermanschette gezwängt und soweit auf sie aufgeschoben, bis die Anschlag­bleche in Kontakt mit der Monolith-Stirnfläche kommen.The frame is forced over the buffer sleeve during assembly and pushed onto it until the stop plates come into contact with the monolith face.

Der an beiden Enden mit der Halterungsvorrichtung ver­sehene Monolith kann dann mit anderen ebenso ausgerüste­ten Monolithen über die Nut/Feder-Verbindung 4/5 zu einem Katalysatorpaket zusammengesteckt werden.The monolith provided with the holding device at both ends can then be put together with other equally equipped monoliths via the tongue and groove connection 4/5 to form a catalyst package.

Die rechte Figur 2 zeigt die Projektionsansichten auf das Katalysatorelement 1, eine Puffermanschette 2 und auf einen Rahmen 3.The right FIG. 2 shows the projection views onto the catalytic converter element 1, a buffer sleeve 2 and onto a frame 3.

Claims (3)

1. Vorrichtung zur Halterung von viereckigen monolithi­schen keramischen Katalysatorelementen sowie zur Zusam­menfassung derselben zu einem Paket, gekennzeichnet durch a) eine der Außenform des Katalysatorelements (1) entsprechende und formschlüssig auf dieses auf­schiebbare elastische Puffermanschette (2), b) einen der Außenform von Katalysatorelement und Puffermanschette entsprechenden Metallrahmen (3), dessen innerer freier Querschnitt größer als die Stirnfläche des Katalysatorelements und kleiner als die Summe der Stirnflächen von Katalysator­element und Puffermanschette oder gleich der Summe dieser Stirnflächen ist, wobei c) Rahmentiefe und Höhe der Puffermanschette minde­stens 1/50 der Länge des Katalysatorelements ent­sprechen und d) jeweils zwei benachbarte Seitenflächen des Rahmens in symmetrischer Anordnung Ausnehmungen bzw. nach innen springende Sicken (4) aufweisen und die beiden übrigen Seitenflächen Vorsprünge (5) auf­weisen, die formschlüssig in die Ausnehmungen bzw. Sicken benachbarter Rahmen eingreifen können. 1. Device for holding square monolithic ceramic catalyst elements and for combining them into a package, characterized by a) one corresponding to the outer shape of the catalyst element (1) and positively slidable on this elastic buffer sleeve (2), b) a metal frame (3) corresponding to the outer shape of the catalyst element and buffer sleeve, the inner free cross section of which is larger than the end face of the catalyst element and smaller than the sum of the end faces of the catalyst element and buffer sleeve or equal to the sum of these end faces, wherein c) frame depth and height of the buffer sleeve correspond to at least 1/50 the length of the catalyst element and d) each have two adjacent side surfaces of the frame in a symmetrical arrangement of recesses or inwardly projecting beads (4) and the two other side surfaces have projections (5) which can positively engage in the recesses or beads of adjacent frames. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Metallrahmen (3) an seiner Stirnseite nach innen unter Ausbildung eines durchgehenden oder in mehrere Zungen aufgeteilten Anschlags (6) für eine Randzone der Stirnfläche des Katalysatorelements vor­springt.2. Device according to claim 1, characterized in that the metal frame (3) protrudes on its end face inwards with the formation of a continuous or divided into several tongues stop (6) for an edge zone of the end face of the catalyst element. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Kombination aus Puffermanschette und Metallrahmen für eine Anbringung an mindestens einem Endabschnitt des Katalysatorelements vorgesehen ist.3. Apparatus according to claim 1 or 2, characterized in that the combination of buffer sleeve and metal frame is provided for attachment to at least one end portion of the catalyst element.
EP87100966A 1986-02-01 1987-01-23 Mounting device for a monolithic catalyst Expired EP0233509B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100966T ATE41204T1 (en) 1986-02-01 1987-01-23 DEVICE FOR SUPPORTING MONOLITH CATALYSTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8602600U 1986-02-01
DE8602600U DE8602600U1 (en) 1986-02-01 1986-02-01 Device for holding monolith catalysts

Publications (2)

Publication Number Publication Date
EP0233509A1 true EP0233509A1 (en) 1987-08-26
EP0233509B1 EP0233509B1 (en) 1989-03-08

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EP87100966A Expired EP0233509B1 (en) 1986-02-01 1987-01-23 Mounting device for a monolithic catalyst

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US (1) US4859428A (en)
EP (1) EP0233509B1 (en)
JP (1) JPH0417217Y2 (en)
AT (1) ATE41204T1 (en)
DE (2) DE8602600U1 (en)
ES (1) ES2000116B3 (en)
GR (2) GR880300024T1 (en)

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Also Published As

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DE8602600U1 (en) 1986-03-13
ES2000116B3 (en) 1992-02-01
ATE41204T1 (en) 1989-03-15
ES2000116A4 (en) 1987-12-16
JPS62126225U (en) 1987-08-11
US4859428A (en) 1989-08-22
GR3000038T3 (en) 1990-01-31
JPH0417217Y2 (en) 1992-04-17
GR880300024T1 (en) 1988-10-18
EP0233509B1 (en) 1989-03-08
DE3760059D1 (en) 1989-04-13

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