EP0152520A2 - Grate for furnaces - Google Patents
Grate for furnaces Download PDFInfo
- Publication number
- EP0152520A2 EP0152520A2 EP84109779A EP84109779A EP0152520A2 EP 0152520 A2 EP0152520 A2 EP 0152520A2 EP 84109779 A EP84109779 A EP 84109779A EP 84109779 A EP84109779 A EP 84109779A EP 0152520 A2 EP0152520 A2 EP 0152520A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grate
- grate bar
- bar
- flanks
- recesses
- 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
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/12—Fire-bars
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
- F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
Definitions
- the invention relates to a grate, in particular for furnaces, with grate steps which can be moved in their longitudinal direction and partially overlap one another, from individual grate bars which can be moved relative to one another and which lie against one another with lateral contact surfaces on their grate bar flanks and which at least partially protrude from the outer ribs of the grate bar which project downwards .
- the object of the invention is to provide a grate or the grate bars necessary for this, in which the disturbances resulting from the penetration between the grate bars are avoided, ie the grate is designed so that the parts penetrating between the grate bars quickly between the grate bar flanks can be discharged downwards, so that they cannot give rise to jamming of the adjacent grate bars or to an increase in the distance between adjacent grate bars.
- the cavity cooling of the grate bar should not be significantly impaired.
- This object is achieved by the features specified in claim 1.
- This configuration of the grate bar flanks creates sawtooth-like contact surfaces, the flanks of which form cutting edges which, with the corresponding cutting edges of the adjacent grate bar, act on the penetrated parts, such as the cooperating cutting edges of a cutter bar, on the material to be cut. Since the cutting edges are inclined due to the sawtooth-like design, the relative movement of adjacent grate bars results in a force effect on the parts that are downwards, i.e. is directed from the bottom of the grate bar to the bottom of the grate bar.
- the recesses in the flanks form relief niches from which the parts can fall freely as soon as they get into such a relief niche due to the mutual movement.
- a particularly favorable ejection effect on the penetrated parts is achieved when the flanks of the teeth remaining between the recesses have an inclination with respect to the surface of the grate bar of between 20 and 50 °, in particular of 35 °.
- the tooth pitch essentially corresponds to the double relative movement of adjacent grate bars, it is ensured that the cutting edges move against one another along their entire length during a complete stroke, as a result of which parts which penetrate into the recesses are actually detected and adjusted promoted below.
- the grate bar flank remaining above the recesses has a height that makes up about a third to a quarter of the total height of the grate bar flank and thus corresponds to only a small part of the grate bar flank height, it is ensured that penetrated parts very soon get into a recess and there through the sawtooth-like grate bar flanks are pushed down.
- the invention also relates to a grate bar, which is characterized in claim 6. Refinements of this grate bar result from subclaims 7 and 8.
- a grate step of a furnace grate is formed from a plurality of grate bars 1 lying next to one another, which are movable relative to one another, which is indicated by the offset position in FIGS. 1 and 2.
- each grate bar 1 has a grate bar bridge 2 and grate bar flanks 3 which laterally protrude from the outer ribs 4 projecting downwards.
- Each grate bar flank has sawtooth-like recesses 5, which are closed upwards in the direction of the grate bar bridges 2 and are open towards the underside of the grate bar.
- relief niches are formed between the tooth flanks 7 of the teeth 9 formed by the recesses 5, which are composed of the recesses of adjacent grate bars and have a constantly changing volume during the relative stroke. In these relief niches fall those parts that come between adjacent grate bars and are pressed by the cutting edges 8 adjacent grate bars due to the wedge effect resulting from the cutting edge downward in the direction of arrow 10.
- Such a particle is designated by 11.
- the part of a grate bar flank remaining above the recess as far as the grate bar ridge is designated by 12 and forms that region of the grate bar flank with the lowest height. In the exemplary embodiment shown, this area has a height which is approximately a quarter of the makes up the entire height of the grate bar flank 3.
- the distance between two teeth 9 of a grate bar flank is designated 13 and forms a tooth pitch of the grate bar flank.
- two adjacent grate bars are shown offset from each other by half a tooth pitch, so that with a grate bar stroke, which corresponds to half the tooth pitch, the teeth of adjacent grate bar flanks are in the front position of the movable grate bar with a gap , while the teeth 9 of adjacent grate bar flanks overlap when the movable grate bar is in its rear stoking position.
- This tooth-like configuration of the grate bar flanks is preferably limited to the focal path area of a grate bar, that is the area which is not subject to permanent overlap by the grate bar located above it.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Food-Manufacturing Devices (AREA)
- Furnace Details (AREA)
- Catalysts (AREA)
Abstract
Der Rost einer Rostfeuerung weist nebeneinander liegende Roststäbe auf, die relativ zueinander bewegbar sind. Die Roststäbe (1) berühren sich an ihren Roststabflanken (3), die gegenüber nach unten ragenden Außenrippen (4) überstehen. Im Brennbahnbereich sind die Roststabflanken (3) mit sägezahnartigen Ausnehmungen (5) versehen, die nach unten offen und zum Roststabrücken (2) hin geschlossen sind. Hierdurch entstehen sägezahnartige Berührungsflächen (6), deren Kanten Schneiden (8) bilden, die die Außenkanten der Zahnflanken (7) darstellen und gegenüber dem Roststabrücken um etwa 35° geneigt sind. Aufgrund der gegenseitigen Neigung dieser Schneiden benachbarter Roststabflanken wird bei einem Relativhub auf ein zwischen die Flanken gelangendes Teilchen (11) eine nach unten gerichtete Kraft ausgeübt, so daß das Teilchen in die durch benachbarte Ausnehmungen (5) gebildete Entlastungsnische fallen kann.The grate of a grate fire has grate bars lying next to one another, which can be moved relative to one another. The grate bars (1) touch on their grate bar flanks (3) which protrude from the outer ribs (4) projecting downwards. In the focal path area, the grate bar flanks (3) are provided with sawtooth-like recesses (5) which are open at the bottom and closed towards the grate bar back (2). This creates sawtooth-like contact surfaces (6), the edges of which form cutting edges (8) which represent the outer edges of the tooth flanks (7) and are inclined by approximately 35 ° with respect to the grate bar bridge. Due to the mutual inclination of these cutting edges of adjacent grate bar flanks, a downward force is exerted on a particle (11) reaching between the flanks during a relative stroke, so that the particle can fall into the relief niche formed by adjacent recesses (5).
Description
Die Erfindung bezieht sich auf einen Rost, insbesondere für Feuerungen, mit in seiner Längsrichtung bewegbaren und einander teilweise überdeckenden Roststufen aus einzelnen relativ zueinander bewegbaren Roststäben, die mit seitlichen Berührungsflächen an ihren Roststabflanken, aneinanderliegen, welche zumindest teilweise gegenüber nach unten ragenden Außenrippen des Roststabes hervorstehen.The invention relates to a grate, in particular for furnaces, with grate steps which can be moved in their longitudinal direction and partially overlap one another, from individual grate bars which can be moved relative to one another and which lie against one another with lateral contact surfaces on their grate bar flanks and which at least partially protrude from the outer ribs of the grate bar which project downwards .
Während der Schürbewegung des Rostes können sich widerstandsfähige, insbesondere metallische Feinteile zwischen die einzelnen Roststäbe schieben und sich zwischen diesen verklemmen. Hierdurch entstehen Spalte zwischen den Roststäben, durch die in verstärktem Maße die Luft aus der Unterwindzone hindurchstreicht, so daß nicht nur ein ungleichmäßiger Abbrand auf dem Rost, sondern auch bei hohlen, zwangsweise luftdurchströmten Roststäben die Kühlung der Roststäbe nachläßt. Dies kann zu einer Überhitzung und einem erhöhten Verschleiß der Roststäbe führen. Weiterhin können diese Teile aber auch, wenn sie trotz der Relativbewegung benachbarter Stäbe nicht verschleißen, durch Spaltvergrößerung zu einem Blockieren der gegenseitigen Bewegungsmöglichkeit benachbarter Roststäbe führen.During the stoking movement of the grate, resistant, in particular metallic, fine parts can slide between the individual grate bars and jam between them. This creates gaps between the grate bars through which the air from the underwind zone passes to an increased extent, so that not only uneven burn-up on the grate, but also cooling of the grate bars with hollow, forced air-flowed bars decreases. This can lead to overheating and increased wear of the grate bars. Furthermore, if these parts do not wear despite the relative movement of adjacent bars, these parts can also block the mutual possibility of movement of adjacent grate bars by increasing the gap.
Aufgabe der Erfindung ist es, einen Rost bzw. die hierfür notwendigen Roststäbe zu schaffen, bei dem die sich aus dem Eindringen zwischen die Roststäbe ergebenden Störungen vermieden sind, d.h. den Rost so auszubilden, daß die zwischen die Roststäbe eindringenden Teile rasch zwischen den Roststabflanken nach unten abgeführt werden können, so daß sie weder zu einem Verklemmen der benachbarten Roststäbe, noch zu einer Vergrößerung des Abstandes zwischen benachbarten Roststäben Veranlassung geben können. Insbesondere soll bei hohl ausgebildeten Roststäben die Hohlraumkühlung des Roststabes nicht wesentlich beeinträchtigt werden.The object of the invention is to provide a grate or the grate bars necessary for this, in which the disturbances resulting from the penetration between the grate bars are avoided, ie the grate is designed so that the parts penetrating between the grate bars quickly between the grate bar flanks can be discharged downwards, so that they cannot give rise to jamming of the adjacent grate bars or to an increase in the distance between adjacent grate bars. In particular, in the case of hollow grate bars, the cavity cooling of the grate bar should not be significantly impaired.
Diese Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst. Durch diese Ausgestaltung der Roststabflanken entstehen sägezahnartige Berührungsflächen, deren Flanken Schneiden bilden, die mit den entsprechenden Schneiden des benachbarten Roststabes auf die eingedrungenen Teile wie die zusammenwirkenden Schneiden eines Mähbalkens auf das schneidende Gut einwirken. Da die Schneiden aufgrund der sägezahnartigen Ausbildung schräg gestellt sind, ergibt sich hier aufgrund der Relativbewegung benachbarter Roststäbe eine Kraftwirkung auf die Teile, die nach unten, d.h. ausgehend von Roststabrücken zur Roststabunterseite gerichtet ist. Die Ausnehmungen in den Flanken bilden dabei Entlastungsnischen, aus denen die Teile frei herausfallen können, sobald sie aufgrund der gegenseitigen Bewegung in eine solche Entlastungsnische geraten.This object is achieved by the features specified in claim 1. This configuration of the grate bar flanks creates sawtooth-like contact surfaces, the flanks of which form cutting edges which, with the corresponding cutting edges of the adjacent grate bar, act on the penetrated parts, such as the cooperating cutting edges of a cutter bar, on the material to be cut. Since the cutting edges are inclined due to the sawtooth-like design, the relative movement of adjacent grate bars results in a force effect on the parts that are downwards, i.e. is directed from the bottom of the grate bar to the bottom of the grate bar. The recesses in the flanks form relief niches from which the parts can fall freely as soon as they get into such a relief niche due to the mutual movement.
Eine besonders günstige Ausschubwirkung auf die eingedrungenen Teile wird dann erreicht, wenn die Flanken der zwischen den Ausnehmungen verbleibenden Zähne eine Neigung gegenüber der Roststabrückenoberfläche von zwischen 20 und 50°, insbesondere von 35° aufweisen.A particularly favorable ejection effect on the penetrated parts is achieved when the flanks of the teeth remaining between the recesses have an inclination with respect to the surface of the grate bar of between 20 and 50 °, in particular of 35 °.
Diese Ausschubwirkung wird auch dadurch wesentlich verbessert, wenn in weiterer Ausgestaltung der Erfindung die sägezahnartigen Ausnehmungen jeweils benachbarter Roststäbe um eine halbe Zahnteilung in Längsrichtung gegeneinander versetzt sind, wordurch sichergestellt ist, daß diejenige Relativstellung benachbarter Schneiden erreichbar ist, in welcher eine möglichst geringe Überdeckung der sägezahnartigen Flanken eintritt und damit möglichst große Entlastungsnischen entstehen.This extension effect is also significantly improved if, in a further embodiment of the invention, the sawtooth-like recesses of adjacent grate bars are offset by half a tooth pitch in the longitudinal direction, thereby ensuring that the relative position of adjacent cutting edges can be reached in which covers the sawtooth-like flanks as little as possible and thus creates the largest possible relief niches.
Wenn nach einer weiteren Ausgestaltung der Erfindung die Zahnteilung im wesentlichen der doppelten Relativbewegung benachbarter Roststäbe entspricht, so wird sichergestellt, daß bei einem vollständigen Hub die Schneiden sich an ihrer gesamten Länge gegeneinander bewegen, wodurch Teile die in die Ausnehmungen eindringen, auch tatsächlich erfaßt und nach unten gefördert werden.If, according to a further embodiment of the invention, the tooth pitch essentially corresponds to the double relative movement of adjacent grate bars, it is ensured that the cutting edges move against one another along their entire length during a complete stroke, as a result of which parts which penetrate into the recesses are actually detected and adjusted promoted below.
Wenn die über den Ausnehmungen verbleibende Roststabflanke eine Höhe aufweist, die etwa ein Drittel bis ein Viertel der Gesamthöhe der Roststabflanke ausmacht und damit nur einem geringen Teil der Roststabflankenhöhe entspricht, so wird sichergestellt, daß eingedrungene Teile sehr bald in eine Ausnehmung gelangen und dort durch die sägezahnartigen Roststabflanken nach unten herausgedrückt werden.If the grate bar flank remaining above the recesses has a height that makes up about a third to a quarter of the total height of the grate bar flank and thus corresponds to only a small part of the grate bar flank height, it is ensured that penetrated parts very soon get into a recess and there through the sawtooth-like grate bar flanks are pushed down.
Die Erfindung bezieht sich auch auf einen Roststab, der im Anspruch 6 gekennzeichnet ist. Ausgestaltungen dieses Roststabes ergeben sich aus den Unteransprüchen 7 und 8.The invention also relates to a grate bar, which is characterized in claim 6. Refinements of this grate bar result from subclaims 7 and 8.
Die Erfindung ist in der Zeichnung beispielsweise dargestellt. In dieser zeigen:
- Fig. 1 eine Ansicht von oben auf eine aus mehreren relativ zueinander bewegbaren Roststäben gebildete Roststufe eines Feuerungsrostes;
- Fig. 2 einen Schnitt nach der Linie II-II in Fig. 1;
- Fig. 3 einen Schnitt nach der Linie III-III in Fig. 2.
- 1 shows a view from above of a grate step of a firing grate formed from a plurality of grate bars movable relative to one another;
- Figure 2 is a section along the line II-II in Fig. 1.
- 3 shows a section along the line III-III in FIG. 2nd
Wie aus Fig. 1 ersichtlich, ist eine Roststufe eines Feuerungsrostes aus mehreren nebeneinanderliegenden Roststäben 1 gebildet, die relativ zueinander bewegbar sind, was durch die versetzte Lage in den Fig. 1 und 2 angedeutet ist. Wie die Fig. 2 und 3 zeigen, weist jeder Roststab 1 einen Roststabrücken 2 und Roststabflanken 3 auf, die gegenüber nach unten ragenden Außenrippen 4 seitlich überstehen.As can be seen from FIG. 1, a grate step of a furnace grate is formed from a plurality of grate bars 1 lying next to one another, which are movable relative to one another, which is indicated by the offset position in FIGS. 1 and 2. As shown in FIGS. 2 and 3, each grate bar 1 has a
Jede Roststabflanke weist sägezahnartige Ausnehmungen 5 auf, die nach oben in Richtung auf den Roststabrücken 2 geschlossen und zur Roststabunterseite hin offen sind. Hierdurch entstehen sägezahnartige Berührungsflächen 6, wobei die einzelnen Sägezähne Flanken 7 aufweisen, deren Außenkanten an den Berührungsflächen Schneiden 8 bilden, die mit den Schneiden des benachbarten Roststabes zusammenwirken, wobei sich die Überdeckung der Berührungsflächen 6 während eines Relativhubes ständig ändert,so daß die Schneiden 8 wie die Klingen einer Schere aneinander vorbeibewegt werden. Zwischen den Zahnflanken 7 der durch die Ausnehmungen 5 gebildeten Zähne 9 entstehen bei einem Relativhub Entlastungsnischen, die sich aus den Ausnehmungen benachbarter Roststäbe zusammensetzen und während des Relativhubes ein stetig sich änderndes Volumen aufweisen. In diese Entlastungsnischen fallen diejenigen Teile, die zwischen benachbarte Roststäbe gelangen und von den Schneiden 8 benachbarten Roststäbe aufgrund der sich aus der Schneidenneigung ergebenden Keilwirkung nach unten in Richtung des Pfeiles 10 gedrückt werden. Ein solches Teilchen ist mit 11 bezeichnet.Each grate bar flank has sawtooth-
Der oberhalb der Ausnehmung bis zum Roststabrücken verbleibende Teil einer Roststabflanke ist mit 12 bezeichnet und bildet denjenigen Bereich der Roststabflanke mit der geringsten Höhe. Dieser Bereich weist im dargestellten Ausführungsbeispiel eine Höhe auf, die etwa ein Viertel der gesamten Höhe der Roststabflanke 3 ausmacht.The part of a grate bar flank remaining above the recess as far as the grate bar ridge is designated by 12 and forms that region of the grate bar flank with the lowest height. In the exemplary embodiment shown, this area has a height which is approximately a quarter of the makes up the entire height of the
Der Abstand zwischen zwei Zähnen 9 einer Roststabflanke ist mit 13 bezeichnet und bildet eine Zahnteilung der Roststabflanke. Wie aus der Darstellung in Fig. 2 ersichtlich, sind jeweils zwei benachbarte Roststäbe um eine halbe Zahnteilung gegeneinander versetzt dargestellt, so daß bei einem Roststabhub, welcher der halben Zahnteilung entspricht, die Zähne benachbarter Roststabflanken in der vorderen Stellung des bewegbaren Roststabes auf Lücke zueinander stehen, während sich die Zähne 9 benachbarter Roststabflanken überdecken, wenn sich der bewegbare Roststab in seiner hinteren Schürstellung befindet.The distance between two
Diese zahnartige Ausbildung der Roststabflanken ist vorzugsweise auf den Brennbahnbereich eines Roststabes beschränkt, das ist derjenige Bereich, der nicht einer dauernden Überdeckung durch den darüberliegenden Roststab unterworfen ist.This tooth-like configuration of the grate bar flanks is preferably limited to the focal path area of a grate bar, that is the area which is not subject to permanent overlap by the grate bar located above it.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3330637A DE3330637C1 (en) | 1983-08-24 | 1983-08-24 | Rust, especially for furnaces |
DE3330637 | 1983-08-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0152520A2 true EP0152520A2 (en) | 1985-08-28 |
EP0152520A3 EP0152520A3 (en) | 1986-04-02 |
EP0152520B1 EP0152520B1 (en) | 1988-11-09 |
Family
ID=6207397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84109779A Expired EP0152520B1 (en) | 1983-08-24 | 1984-08-17 | Grate for furnaces |
Country Status (8)
Country | Link |
---|---|
US (1) | US4520792A (en) |
EP (1) | EP0152520B1 (en) |
JP (1) | JPS6060415A (en) |
CA (1) | CA1227376A (en) |
DE (1) | DE3330637C1 (en) |
DK (1) | DK160958C (en) |
SG (1) | SG78889G (en) |
SU (1) | SU1344255A3 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2312947A (en) * | 1996-05-10 | 1997-11-12 | Boiler Energy Serv Ltd | Grate bar |
FR2885403A1 (en) * | 2005-05-03 | 2006-11-10 | Saretco Sa | GRID BAR AND GRID FOR FIREPLACE WITH SOLIDARITY GRADES |
FR2885404A1 (en) * | 2005-05-03 | 2006-11-10 | Saretco Sa | GRID BAR AND GRID FOR FIREPLACE WITH SOLIDARITY GRADES WITH DIRECT AIR COMBUSTION |
ITPV20100006A1 (en) * | 2010-04-09 | 2011-10-10 | Davide Raveri | ALTERNATE MOBILE GRID |
GB2483479A (en) * | 2010-09-09 | 2012-03-14 | Tiska Gmbh | Furnace grate bars |
US9193528B2 (en) * | 2014-04-10 | 2015-11-24 | Grifols Worldwide Operations Limited | Vial transport mechanism |
EP2985339B1 (en) * | 2014-08-11 | 2020-05-13 | Kompoferm GmbH | Fermentation residue conditioning device and method for conditioning fermentation residues |
CN108286712B (en) * | 2018-03-15 | 2023-09-22 | 重庆科技学院 | Waste treatment tube furnace based on gear-rubbing fire bar group |
CN108413407B (en) * | 2018-03-15 | 2023-09-22 | 重庆科技学院 | Sawtooth-shaped gear-rubbing fire bar |
CN110925765B (en) * | 2019-12-13 | 2024-03-26 | 重庆科技学院 | Multi-blade multi-tooth composite movable fire grate segment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE136644C (en) * | ||||
DE457741C (en) * | 1928-03-22 | Reinhard Tweer | Grate made of interlocking grate bars with serpentine teeth | |
GB420257A (en) * | 1933-12-14 | 1934-11-28 | Alfred George Howell | Improvements in firebars for use in land and marine boilers |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1553587A (en) * | 1924-06-10 | 1925-09-15 | Balmfirth Alfred | Grate |
US2806439A (en) * | 1952-11-08 | 1957-09-17 | Detroit Stoker Co | Grate |
DE3049086C2 (en) * | 1980-12-24 | 1983-07-14 | Widmer & Ernst AG, 5430 Wettingen | Grate bar row for furnace grates in incinerators |
-
1983
- 1983-08-24 DE DE3330637A patent/DE3330637C1/en not_active Expired
-
1984
- 1984-08-17 EP EP84109779A patent/EP0152520B1/en not_active Expired
- 1984-08-22 US US06/643,284 patent/US4520792A/en not_active Expired - Lifetime
- 1984-08-23 CA CA000461620A patent/CA1227376A/en not_active Expired
- 1984-08-23 JP JP59174194A patent/JPS6060415A/en active Granted
- 1984-08-23 DK DK404284A patent/DK160958C/en not_active IP Right Cessation
- 1984-08-23 SU SU843783020A patent/SU1344255A3/en active
-
1989
- 1989-12-08 SG SG788/89A patent/SG78889G/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE136644C (en) * | ||||
DE457741C (en) * | 1928-03-22 | Reinhard Tweer | Grate made of interlocking grate bars with serpentine teeth | |
GB420257A (en) * | 1933-12-14 | 1934-11-28 | Alfred George Howell | Improvements in firebars for use in land and marine boilers |
Also Published As
Publication number | Publication date |
---|---|
EP0152520A3 (en) | 1986-04-02 |
DK404284D0 (en) | 1984-08-23 |
DK160958B (en) | 1991-05-06 |
DE3330637C1 (en) | 1985-01-17 |
CA1227376A (en) | 1987-09-29 |
US4520792A (en) | 1985-06-04 |
EP0152520B1 (en) | 1988-11-09 |
SU1344255A3 (en) | 1987-10-07 |
JPS6352284B2 (en) | 1988-10-18 |
SG78889G (en) | 1990-07-06 |
JPS6060415A (en) | 1985-04-08 |
DK160958C (en) | 1991-11-04 |
DK404284A (en) | 1985-02-25 |
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