EP0364782B1 - Device for joining a desk top to a supporting frame - Google Patents

Device for joining a desk top to a supporting frame Download PDF

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Publication number
EP0364782B1
EP0364782B1 EP89117989A EP89117989A EP0364782B1 EP 0364782 B1 EP0364782 B1 EP 0364782B1 EP 89117989 A EP89117989 A EP 89117989A EP 89117989 A EP89117989 A EP 89117989A EP 0364782 B1 EP0364782 B1 EP 0364782B1
Authority
EP
European Patent Office
Prior art keywords
support
clamping levers
locking lever
desktop
engagement
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
EP89117989A
Other languages
German (de)
French (fr)
Other versions
EP0364782A2 (en
EP0364782A3 (en
Inventor
Eitelfriedrich Dr.-Ing. Jahnke
Detlef Dipl.-Ing. Hänsel
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.)
Gesika Bueromobelwerk & Co KG GmbH
Original Assignee
Gesika Bueromobelwerk & Co KG GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gesika Bueromobelwerk & Co KG GmbH filed Critical Gesika Bueromobelwerk & Co KG GmbH
Priority to AT89117989T priority Critical patent/ATE87442T1/en
Publication of EP0364782A2 publication Critical patent/EP0364782A2/en
Publication of EP0364782A3 publication Critical patent/EP0364782A3/en
Application granted granted Critical
Publication of EP0364782B1 publication Critical patent/EP0364782B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B13/00—Details of tables or desks
    • A47B13/003—Connecting table tops to underframes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2200/00—General construction of tables or desks
    • A47B2200/0011—Underframes
    • A47B2200/0013—Desks with central bearing beams

Definitions

  • the invention relates to a device for connecting a desk top to a support frame, which has a table top support that can be firmly connected to the table top and can be attached below the desk top.
  • the table top supports are formed like a clamp in their central region.
  • the brackets surround the profile lugs of a central profile extending in the longitudinal direction.
  • the clip-like areas of the table top support are pushed onto the central profile in the longitudinal direction and fixed in the sliding direction by means of removable clip areas using screws.
  • the known device has the disadvantage, on the one hand, that assembly is only possible with the aid of a tool for fastening the clamping screws.
  • the known construction implies the provision of only one, in Longitudinal direction extending central profile on the base. This severely limits the connection rigidity of the base frame.
  • the invention has for its object to provide a device of the known type so that with its help quick and easy assembly and disassembly between desk support frame and desk top while avoiding the disadvantages of the prior art and without tools.
  • the device according to the invention has the advantage that it is simple in construction and easy to handle. It ensures that every layperson can carry out assembly and disassembly of the table top quickly and easily. Tools are superfluous.
  • the connection created with the new device is firm and allows a uniform introduction of the forces into the supporting frame.
  • the table top is not drawn because of the better overview.
  • the table top support 1 is visible, which is screwed to the underside of the table top, not shown.
  • This table top support 1 carries the essential parts of the connection mechanism.
  • the table top support 1 is with the help of the connection mechanism with the cross bars of the base trained support elements 3 and 4 connected.
  • the support elements 3 and 4 run horizontally and thus at 90 ° to the side rails 2 and 5, which end in a rail 6 standing on the floor.
  • the drawing figure 1 shows only the basic structure. The exact structure is shown in Figures 2 and 3:
  • the underside of the table top support 1 rests on the support elements 3 and 4 designed as cross bars. It has downwardly projecting centering areas 18 and 19, which allow alignment of the table top support and thus the table top on the two support elements 3 and 4.
  • the centering areas 18 and 19 enclose the support elements 3 and 4 between them.
  • a cover plate 7, which is only visible in FIG. 2, is firmly connected to the lower region of the table top support 1.
  • a pin 9a is fixed to the cover plate, the axis of which is designated by 9.
  • the axis 9 forms the pivot axis for a locking lever 8.
  • the pin 9a is encompassed by an elongated hole 8a, the longitudinal extent of which is slightly larger than the diameter of the pin 9.
  • the elongated hole 8a extends in the longitudinal direction of the table top support 1. The provision of an elongated hole permits a displacement of the axis 9 during the pivoting process.
  • clamping levers 16 and 17 extend parallel to the table top support.
  • a pivoting of the locking lever 8 leads to the outer ends of the clamping levers 16 and 17 either moving apart or towards one another.
  • the clamping levers 16 and 17 have clamping hooks 12 and 13 which are loosely connected to them via slots.
  • the clamping hooks 12 and 13 could also be connected in one piece to the clamping levers 16 and 17 without any change in their effect.
  • FIGS. 2 and 3 show the clamping hooks or clamping levers in the locked position, in which the table top support 1 and thus the desk top is firmly fixed on the base frame.
  • the locking lever 8 is pivoted in the direction of arrow 20a.
  • the clamp levers 16 and 17 move with the clamp hooks 12 and 13 in the direction of the axis 9 and the clamp hooks emerge from the receiving openings 14 and 15. Then the desk top with the desk top support 1 can be lifted upwards.
  • the elongated holes 20 and 21 are provided in the clamping levers 16 and 17 and the pins 10 and 11 in the locking lever 8. The same effect can be achieved if the elongated holes 20 and 21 in the locking lever 8 are provided and the cooperating pins 10 and 11 are seated on the clamping levers 16 and 17.

Landscapes

  • Tables And Desks Characterized By Structural Shape (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Clamps And Clips (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Furniture Connections (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Saccharide Compounds (AREA)
  • Handcart (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Replacement Of Web Rolls (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

A desk/table top is attached to a support structure without the need of separate tools by use of a manually operable attachment mechanism that is mounted on the underside of the top. The attachment mechanism includes a latching lever mounted for pivotal movement and a pair of clamp levers mounted for horizontal linear motion toward and away from one another in response to pivotal motion of the latching lever. The clamp levers include portions which are adapted to extend into openings in hollow tubes that comprise cross beams in the support structure when the top is fixedly attached to the support structure.

Description

Die Erfindung betrifft eine Vorrichtung zum Verbinden einer Schreibtischplatte mit einem Traggestell, welche einen fest mit der Tischplatte verbindbaren, unterhalb der Schreibtischplatte anbringbaren Tischplattenträger aufweist.The invention relates to a device for connecting a desk top to a support frame, which has a table top support that can be firmly connected to the table top and can be attached below the desk top.

Bei einer bekannten Vorrichtung dieser Art (DE-OS 31 35 576) sind die Tischplattenträger in ihrem mittleren Bereich klammerartig ausgebildet. Die Klammern umgreifen die Profilnasen eines sich in Längsrichtung erstreckenden Zentralprofils. Die klammerartigen Bereiche der Tischplattenträger werden in Längsrichtung auf das Zentralprofil aufgeschoben und über abnehmbare Klammerbereiche mit Hilfe von Schrauben in der Verschieberichtung fixiert. Die bekannte Vorrichtung besitzt einerseits den Nachteil, daß eine Montage nur mit Hilfe eines Werkzeugs zur Befestigung der Klemmschrauben möglich ist. Außerdem setzt die bekannte Konstruktion das Vorsehen lediglich eines einzigen, in Längsrichtung sich erstreckenden Zentralprofils am Untergestell voraus. Hierdurch ist die Verbindungssteifigkeit des Untergestells stark eingeschränkt.In a known device of this type (DE-OS 31 35 576), the table top supports are formed like a clamp in their central region. The brackets surround the profile lugs of a central profile extending in the longitudinal direction. The clip-like areas of the table top support are pushed onto the central profile in the longitudinal direction and fixed in the sliding direction by means of removable clip areas using screws. The known device has the disadvantage, on the one hand, that assembly is only possible with the aid of a tool for fastening the clamping screws. In addition, the known construction implies the provision of only one, in Longitudinal direction extending central profile on the base. This severely limits the connection rigidity of the base frame.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der als bekannt vorausgesetzten Art so auszubilden, daß mit ihrer Hilfe schnelle und einfache Montagen sowie Demontagen zwischen Schreibtischtraggestell und Schreibtischplatte unter Vermeidung der geschilderten Nachteile des Standes der Technik und ohne Werkzeug möglich sind.The invention has for its object to provide a device of the known type so that with its help quick and easy assembly and disassembly between desk support frame and desk top while avoiding the disadvantages of the prior art and without tools.

Die Lösung dieser Aufgabe erfolgt mit den Merkmalen des Kennzeichnungsteils von Anspruch 1 oder 2.This object is achieved with the features of the labeling part of claim 1 or 2.

Bevorzugte Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.Preferred embodiments of the invention are described in the subclaims.

Die erfindungsgemäße Vorrichtung hat den Vorteil, daß sie einfach aufgebaut und einfach handhabbar ist. Sie stellt sicher, daß jeder Laie sowohl Montage als auch Demontage der Tischplatte schnell und einfach vornehmen kann. Werkzeuge sind überflüssig. Die mit der neuen Vorrichtung erzeugte Verbindung ist fest und erlaubt eine gleichmäßige Einleitung der Kräfte in das Traggestell.The device according to the invention has the advantage that it is simple in construction and easy to handle. It ensures that every layperson can carry out assembly and disassembly of the table top quickly and easily. Tools are superfluous. The connection created with the new device is firm and allows a uniform introduction of the forces into the supporting frame.

Nachstehend wird eine bevorzugte Ausführungsform der Erfindung anhand der Zeichnungen im einzelnen beschrieben. Es zeigen:

Figur 1 -
eine perspektivische Ansicht auf einen Teil eines Schreibtischuntergestells mit einem Tragplattenträger ohne Schreibtischplatte,
Figur 2 -
einen Längsschnitt durch den unteren, mittleren Bereich des Schreibtischplattenträgers mit Querschnitt durch die darunterliegenden parallelen Traggestellholme,
Figur 3 -
eine Draufsicht auf die in Figur 2 dargestellte Konstruktion.
A preferred embodiment of the invention is described in detail below with reference to the drawings. Show it:
Figure 1 -
a perspective view of part of a desk base with a support plate support without a desk top,
Figure 2 -
2 shows a longitudinal section through the lower, central area of the desk top support with a cross section through the underlying parallel support frame spars,
Figure 3 -
a plan view of the construction shown in Figure 2.

In der Zeichnungsfigur 1 ist der besseren Übersicht wegen die Tischplatte nicht gezeichnet. Es ist der Tischplattenträger 1 sichtbar, der mit der Unterseite der nicht dargestellten Tischplatte verschraubt ist. Dieser Tischplattenträger 1 trägt die wesentlichen Teile der Verbindungsmechanik. Der Tischplattenträger 1 wird mit Hilfe der Verbindungsmechanik mit den als Querholmen des Untergestells ausgebildeten Tragelementen 3 und 4 verbunden. Die Tragelemente 3 und 4 verlaufen waagerecht und damit unter 90° zu den Seitenholmen 2 und 5, die in einem auf dem Boden aufstehenden Holm 6 enden. Die Zeichnungsfigur 1 läßt lediglich den grundsätzlichen Aufbau erkennen. Der genaue Aufbau ergibt sich aus Figuren 2 und 3:In the drawing figure 1, the table top is not drawn because of the better overview. The table top support 1 is visible, which is screwed to the underside of the table top, not shown. This table top support 1 carries the essential parts of the connection mechanism. The table top support 1 is with the help of the connection mechanism with the cross bars of the base trained support elements 3 and 4 connected. The support elements 3 and 4 run horizontally and thus at 90 ° to the side rails 2 and 5, which end in a rail 6 standing on the floor. The drawing figure 1 shows only the basic structure. The exact structure is shown in Figures 2 and 3:

Der Tischplattenträger 1 liegt mit seiner Unterseite auf den als Querholmen ausgebildeten Tragelementen 3 und 4 auf. Er besitzt nach unten vorspringende, als Nasen ausgebildete Zentrierbereiche 18 und 19, die eine Ausrichtung des Tischplattenträgers und damit der Tischplatte an den beiden Tragelementen 3 und 4 erlauben. Die Zentrierbereiche 18 und 19 schließen die Tragelemente 3 und 4 zwischen sich ein.The underside of the table top support 1 rests on the support elements 3 and 4 designed as cross bars. It has downwardly projecting centering areas 18 and 19, which allow alignment of the table top support and thus the table top on the two support elements 3 and 4. The centering areas 18 and 19 enclose the support elements 3 and 4 between them.

Eine lediglich in Figur 2 sichtbare Abdeckplatte 7 ist fest mit dem unteren Bereich des Tischplattenträgers 1 verbunden. An der Abdeckplatte ist ein Zapfen 9a befestigt, dessen Achse mit 9 bezeichnet ist. Die Achse 9 bildet die Schwenkachse für einen Verriegelungshebel 8. Der Zapfen 9a wird von einem Langloch 8a umgriffen, dessen Längserstreckung geringfügig größer ist als der Durchmesser des Zapfens 9. Das Langloch 8 a erstreckt sich in Längsrichtung des Tischplattenträgers 1. Das Vorsehen eines Langlochs erlaubt ein Verlagern der Achse 9 beim Schwenkvorgang.A cover plate 7, which is only visible in FIG. 2, is firmly connected to the lower region of the table top support 1. A pin 9a is fixed to the cover plate, the axis of which is designated by 9. The axis 9 forms the pivot axis for a locking lever 8. The pin 9a is encompassed by an elongated hole 8a, the longitudinal extent of which is slightly larger than the diameter of the pin 9. The elongated hole 8a extends in the longitudinal direction of the table top support 1. The provision of an elongated hole permits a displacement of the axis 9 during the pivoting process.

Am Verriegelungshebel 8 sitzen zwei Mitnehmerzapfen 10 und 11, die ihrerseits in Langlöcher 20 und 21 eingreifen, welche sich parallel zu den Tragelementen 3 und 4 erstrecken und in Klemmhebeln 16 und 17 vorgesehen sind. Die Klemmhebel 16 und 17 erstrecken sich parallel zu dem Tischplattenträger. Ein Verschwenken des Verriegelungshebels 8 führt dazu, daß die äußeren Enden der Klemmhebel 16 und 17 sich entweder auseinander oder aufeinander zu bewegen. Die Klemmhebel 16 und 17 besitzen im dargestellten Ausführungsbeispiel über Schlitze lose damit verbundene Klemmhaken 12 und 13. Die Klemmhaken 12 und 13 könnten auch einteilig mit den Klemmhebeln 16 und 17 verbunden sein, ohne daß sich an deren Wirkung etwas prinzipielles ändern würde.On the locking lever 8 there are two driver pins 10 and 11, which in turn engage in elongated holes 20 and 21, which extend parallel to the support elements 3 and 4 and are provided in clamping levers 16 and 17. The clamping levers 16 and 17 extend parallel to the table top support. A pivoting of the locking lever 8 leads to the outer ends of the clamping levers 16 and 17 either moving apart or towards one another. In the exemplary embodiment shown, the clamping levers 16 and 17 have clamping hooks 12 and 13 which are loosely connected to them via slots. The clamping hooks 12 and 13 could also be connected in one piece to the clamping levers 16 and 17 without any change in their effect.

Die Klemmhaken 13 und 14 besitzen nach unten geneigte Einlaufflächen, mit denen sie zum Anlegen an die obere Begrenzung der Aufnahmeöffnungen 14 und 15 ausgebildet sind. Die Figuren 2 und 3 zeigen die Klemmhaken bzw. Klemmhebel in der Verriegelungsstellung, in der der Tischplattenträger 1 und damit die Schreibtischplatte fest auf dem Untergestell fixiert ist. Für ein Lösen der Verbindung wird der Verriegelungshebel 8 in Richtung des Pfeils 20a verschwenkt. Dabei wandern die Klemmhebel 16 und 17 mit den Klemmhaken 12 und 13 in Richtung auf die Achse 9 und die Klemmhaken tauchen aus den Aufnahmeöffnungen 14 und 15 aus. Danach kann ein Abheben der Schreibtischplatte mit Tischplattenträger 1 nach oben erfolgen.The clamping hooks 13 and 14 have downwardly inclined run-in surfaces with which they are designed for contacting the upper limit of the receiving openings 14 and 15. Figures 2 and 3 show the clamping hooks or clamping levers in the locked position, in which the table top support 1 and thus the desk top is firmly fixed on the base frame. To release the connection, the locking lever 8 is pivoted in the direction of arrow 20a. The clamp levers 16 and 17 move with the clamp hooks 12 and 13 in the direction of the axis 9 and the clamp hooks emerge from the receiving openings 14 and 15. Then the desk top with the desk top support 1 can be lifted upwards.

Im dargestellten Ausführungsbeispiel sind die Langlöcher 20 und 21 in den Klemmhebeln 16 und 17 vorgesehen und die Zapfen 10 und 11 im Verriegelungshebel 8. Eine gleiche Wirkung ist erzielbar, wenn die Langlöcher 20 und 21 in dem Verriegelungshebel 8 vorgesehen sind und die damit zusammenwirkenden Zapfen 10 und 11 an den Klemmhebeln 16 und 17 sitzen.In the illustrated embodiment, the elongated holes 20 and 21 are provided in the clamping levers 16 and 17 and the pins 10 and 11 in the locking lever 8. The same effect can be achieved if the elongated holes 20 and 21 in the locking lever 8 are provided and the cooperating pins 10 and 11 are seated on the clamping levers 16 and 17.

Die durch das Langloch 8a geschaffene Möglichkeit, die Schwenkachse 9 gegenüber einer ortsfesten Anordnung zu verlagern, hat den Vorteil, daß stets eine automatische Zentrierung in der Weise erfolgt, daß sich die Klemmhaken 12 und 13 stets mit gleichen Anzugskräften und gleichen Wegen in die Aufnahmeöffnungen 14 und 15 einlegen. Mit dieser Maßnahme können also Fertigungsungenauigkeiten ausgeglichen werden, ohne daß dadurch die Verbindung leidet.The possibility created by the elongated hole 8a to shift the pivot axis 9 relative to a fixed arrangement has the advantage that there is always an automatic centering in such a way that the clamping hooks 12 and 13 are always in the receiving openings 14 with the same tightening forces and the same paths and insert 15. With this measure, manufacturing inaccuracies can be compensated for without the connection suffering as a result.

Claims (9)

  1. Device for connecting a desktop plate to a support frame which device has a desktop plate support (1) fixedly connectable to the desktop plate and attachable beneath same,
    characterised in that the desktop plate support (1) is provided with a locking lever (8) which can swivel about an axis and which is provided with two entrainment pins (10 and 11) at a distance from the swivel axis (9) whereby these pins engage in oblong holes (20 and 21) of clamping levers (16,17) which are designed for clamping engagement in socket openings (14 and 15) which are provided in support elements (3 and 4) of the lower frame extending across the desktop support (1) wherein turning the locking lever (8) in one rotary direction brings the clamping levers (16 and 17) into engagement with the socket openings (14 and 15) and turning the locking lever in the other direction brings the clamping levers out of engagement with the socket openings (14 and 15).
  2. Device for connecting a desktop plate with a support frame which has a desktop plate support (1) fixedly connectable with the desktop plate and attachable underneath same,
    characterised in that the desktop support (1) is provided with a locking lever (8) which can swivel about an axis (9) and which has two oblong holes set at a distance from the swivel axis (9) into which engage pivots of the clamping levers (16 and 17) which are designed for clamping engagement with socket openings (14 and 15) which are provided in support elements (3 and 4) of the lower frame extending across the desktop support (1) whereby turning the locking lever (8) in one rotary direction brings the clamping levers (16 and 17) in to engagement with the socket openings (14 and 15) and turning the clamping levers in the other direction brings the clamping levers out of engagement with the socket openings.
  3. Device according to claim 1 or 2
    characterised in that the support elements are two rectangular support tubes (3 and 4) running parallel to each other and provided on their opposing inner faces with socket openings (15;14) for the clamping levers (17;16).
  4. Device according to one or more of claims 1 to 3
    characterised in that the desktop support (1) has downwardly projecting centring areas (18 and 19) which interact with counter faces of the support elements.
  5. Device according to claim 4
    characterised in that the centring areas (18;19) interact with the outside faces of the rectangular support tubes (3;4).
  6. Device according to one or more of claims 1 to 5
    characterised in that the rotary axis (9) of the locking lever (8) can be displaced in the longitudinal direction of the clamping levers (16;17).
  7. Device according to claim 6
    characterised in that the locking lever (8) has an oblong hole extending in the longitudinal direction of the clamping levers (16;17) into which the locally fixed bearing pin engages.
  8. Device according to one or more of claims 1 to 6
    characterised in that the locking lever (8) has a bearing pin which is guided in a locally fixed oblong hole extending in the direction of the clamping levers (16;17).
  9. Device according to one or more of claims 1 to 8
    characterised in that the clamping levers (16;17) have hook areas (12;13) which have engagement faces running inclined when tightened to adjoin the wall of the socket openings (14;15).
EP89117989A 1988-10-18 1989-09-28 Device for joining a desk top to a supporting frame Expired - Lifetime EP0364782B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89117989T ATE87442T1 (en) 1988-10-18 1989-09-28 DEVICE FOR CONNECTING A DESK TOP TO A SUPPORT FRAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835365 1988-10-18
DE3835365A DE3835365A1 (en) 1988-10-18 1988-10-18 DEVICE FOR CONNECTING A DESKTOP TABLE TO A CARRIER

Publications (3)

Publication Number Publication Date
EP0364782A2 EP0364782A2 (en) 1990-04-25
EP0364782A3 EP0364782A3 (en) 1991-03-27
EP0364782B1 true EP0364782B1 (en) 1993-03-31

Family

ID=6365322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89117989A Expired - Lifetime EP0364782B1 (en) 1988-10-18 1989-09-28 Device for joining a desk top to a supporting frame

Country Status (11)

Country Link
US (1) US4944235A (en)
EP (1) EP0364782B1 (en)
JP (1) JPH02164309A (en)
AT (1) ATE87442T1 (en)
DE (2) DE3835365A1 (en)
DK (1) DK486889A (en)
ES (1) ES2039789T3 (en)
FI (1) FI88104C (en)
GR (1) GR3007543T3 (en)
NO (1) NO171582C (en)
PT (1) PT92003B (en)

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Also Published As

Publication number Publication date
DE3835365C2 (en) 1991-09-05
PT92003B (en) 1995-08-09
PT92003A (en) 1990-04-30
GR3007543T3 (en) 1993-08-31
US4944235A (en) 1990-07-31
EP0364782A2 (en) 1990-04-25
ES2039789T3 (en) 1993-10-01
NO171582B (en) 1992-12-28
EP0364782A3 (en) 1991-03-27
DE3835365A1 (en) 1990-04-19
DE58903953D1 (en) 1993-05-06
ATE87442T1 (en) 1993-04-15
DK486889A (en) 1990-04-19
NO894098L (en) 1990-04-19
FI88104B (en) 1992-12-31
FI894912A0 (en) 1989-10-17
DK486889D0 (en) 1989-10-03
FI88104C (en) 1993-04-13
NO171582C (en) 1993-04-07
JPH02164309A (en) 1990-06-25
NO894098D0 (en) 1989-10-13

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