DK159702B - Sealing and pull-absorbing cable connection - Google Patents

Sealing and pull-absorbing cable connection Download PDF

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Publication number
DK159702B
DK159702B DK260486A DK260486A DK159702B DK 159702 B DK159702 B DK 159702B DK 260486 A DK260486 A DK 260486A DK 260486 A DK260486 A DK 260486A DK 159702 B DK159702 B DK 159702B
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DK
Denmark
Prior art keywords
sleeve
sealing
tubular
cable
nut
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DK260486A
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Danish (da)
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DK260486D0 (en
DK159702C (en
DK260486A (en
Inventor
Lars Magnus Melin
Bjoern Kardefeldt
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Thorsman & Co Ab
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Publication of DK260486D0 publication Critical patent/DK260486D0/en
Publication of DK260486A publication Critical patent/DK260486A/en
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Publication of DK159702C publication Critical patent/DK159702C/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
    • H02G3/0616—Joints for connecting tubing to casing
    • H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
    • H02G3/065—Joints for connecting tubing to casing with means for preventing disengagement of conductors with means biting into the conductor-insulation, e.g. teeth-like elements or gripping fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
    • H02G3/0616—Joints for connecting tubing to casing
    • H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
    • H02G3/0675—Joints for connecting tubing to casing with means for preventing disengagement of conductors with bolts operating in a direction parallel to the conductors

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cable Accessories (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Insulating Bodies (AREA)
  • Bridges Or Land Bridges (AREA)

Description

DK 159702 BDK 159702 B

Den foreliggende opfindelse angår en tætnende og trækaflastende forskruning til gennemføring af elektriske kabler i huse til elektriske apparater af forskellig art. Forskruningen, som er af en såkaldt til spændingstype, ind-5 befatter en hylse med et i huisens ene endestykke tilvejebragt ydre gevind, hvormed forskruningen fastgøres til et apparathus eller lignende organ, og en hylsen delvis omgivende og med et andet på hylsens udvendige side tilvejebragt gevind i indgreb stående kappemøtrik, hvilken kap-10 pemøtrik med et indvendigt, tragtformet stykke ligger an mod i hylsens andet endestykke udformede fingre, som ved kappemøtrikkens påskruning presses mod og griber fat om et gennem forskruningen ført kabel. Tætning udøves med en særlig i hylsen placeret tætningsnippel.BACKGROUND OF THE INVENTION The present invention relates to a sealing and tensile relieving sleeve for conducting electrical cables in housings for electrical appliances of various kinds. The socket, which is of a so-called tension type, includes a sleeve having an outer thread provided in one end of the housing, by means of which the screw is secured to an apparatus housing or similar means, and a sleeve partially surrounding and with another on the outer side of the sleeve. threaded cutting nut, said cap nut having an inner, funnel-shaped piece abutting against the fingers formed in the sleeve's other end piece, which is pressed against the cap nut by gripping and grasping a cable passed through the screw. Seal is applied with a special sealing nipple located in the sleeve.

15 Der stilles forskellige krav til gennemføringen af elkabler i huse til elektriske apparater, hvilke krav er afhængige af bl.a. apparaternes opbygning og funktion, samt de omgivelser i hvilket apparatet skal anvendes. I visse tilfælde er det tilstrækkeligt, at kablet beskyttes mod 20 direkte berøring med huset, og i andre tilfælde kræves det, at gennemføringen skal være vandtæt, hvortil i yderligere tilfælde kommer kravet om trækaflastningen af kablet. En kendt og meget anvendt gennemføringstype indbefatter en hylse, hvis ene endestykke er udformede med et ydre gevind 25 til gennemføringens fastgørelse til huset, og i hvis andet endestykke er tilvejebragt en hylséformet, indvendig møtrik på en sådan vis, at den presser en gummipakning mod et sæde, idet gummipakningen ved møtrikkens påskruning er udformet til at kunne presses mod et gennem gennemføringen trukket 30 kabel. Forudsat, at kabeldimensionen er i tæt overensstemmelse med størrelsen i hullet i pakningen, tilvejebringes et tætnende anlæg mellem kabel og pakning, hvorved der også opnås en vis grad af trækaflastning. I det tilfælde, at der udkræves en bedre trækaflastning, er møtrikken sædvanligvis 35 udformet med en til samvirke med en tætningskrave udformet forlængelse, idet kablet efter møtrikkens påskruning med 215 There are various requirements for the implementation of electrical cables in houses for electrical appliances, which are dependent on, inter alia, the structure and function of the apparatus, as well as the environment in which the apparatus is to be used. In some cases it is sufficient that the cable is protected from direct contact with the housing, and in other cases it is required that the lead-through be watertight, in which in addition the requirement for the strain relief of the cable is added. A well known and widely used type of insert includes a sleeve, one end of which is formed with an outer thread 25 for attachment of the insert to the housing, and in whose other end is provided a sleeve-shaped inner nut in such a way that it presses a rubber gasket against a seat, with the rubber gasket at the nut being screwed on, designed to be pressed against a cable pulled through the insert. Provided that the cable dimension is in close agreement with the size of the hole in the gasket, a sealing system is provided between the cable and gasket, thereby also providing a certain degree of tensile relief. In the event that a better tensile relief is required, the nut is usually formed with an extension designed to cooperate with a sealing collar, the cable following the nut screw-in with 2

DK 159702 BDK 159702 B

tætningskraven klemmes fast med forlængelsen af møtrikken.the sealing collar is clamped with the extension of the nut.

DK fremlæqqelsesskrift nr. 150 429 omtaler en forskruning til vandtæt forankring af et elektrisk kabel på et apparatskab, idet forskruningen består af en muffe, en pak-5 dåse, en pakring af deformerbart materiale og en bøsning af derformerbart materiale, hvor pakring og bøsning er koaksialt beliggende. Ved anvendelsen deformeres bøsningen straks ved sammenklemningens begyndelse og griber omkring kablet. Bøsningens greb beskrives som en kraftig sammenklemning omkring 10 kablet. Ved tilspændingen tilvejebringes også et tryk på pakringen, som presses omkring kablet, og pakringen deformeres ligeledes.DK Patent Specification No. 150 429 discloses a socket for watertight anchoring of an electrical cable to an appliance cabinet, the socket consisting of a sleeve, a sealing box, a sealing ring of deformable material and a sleeve of deformable material where sealing ring and socket are coaxially located. In use, the sleeve immediately deforms at the beginning of the clamping and grips the cable. The grip of the bushing is described as a strong clamping around the 10 cable. When tightening, a pressure is also provided on the packing ring which is pressed around the cable and the packing ring is also deformed.

Ved den indbyrdes påvirkning pakring og bøsning imellem forstærkes den udøvede kraft. Det må antages, at der 15 til tilspændingen skal anvendes værktøj.By the interplay between packing and bushing, the exerted force is enhanced. It must be assumed that 15 tools must be used for tightening.

DE offentliqqørelsesskrift 2 547 914 omtaler en kabel-forskruning med trækaflastning med to hylser, en klemindretning og en cylinder formet tætningsring, hvis væg er tilspidset i den ene ende. Fastholdelse og tætning opnås sam-20 tidigt, idet klemindretningen til tilspænding klemmer omkring kablet og samtidigt presser tætningsringen mod kablet. Kabel-forskruningen er udformet til værktøjsanvendelse.DE-A-2 547 914 discloses a cable screw with two-sleeve tension relief, a clamping device and a cylindrical sealing ring, the wall of which is tapered at one end. Retention and sealing are achieved simultaneously, with the clamping device for clamping clamping around the cable and at the same time pressing the sealing ring against the cable. The cable gland is designed for tool use.

I tilknytning til anvendelsen af disse gennemføringer er der den ulempe, at den rette pakningsdimension skal be-25 nyttes, og at møtrikken tilspændes stramt ved hjælp af et værktøj for opnåelse af en acceptabel tætning. Når møtrikken er fast tilspændt, kan den være placeret i en sådan stilling, at det på det nærmeste er umuligt at påvirke tætningskraven.In connection with the use of these bushings, there is the disadvantage that the correct packing dimension must be used and that the nut is tightened tightly by means of a tool to obtain an acceptable seal. When the nut is tightly tightened, it may be located in such a position that it is virtually impossible to influence the sealing requirement.

I det tilfælde, at et apparathus er tilvejebragt med flere 30 gennemføringer, sidder disse ofte så tæt, at det kan være vanskeligt og tidsrøvende med et værktøj at tilspænde en møtrik. Dette medfører, at tætningen ved gennemføringer ofte er fejlbehæftet. Også gennemføringer af den såkaldte tilspændingstype er kendte, hvilke gennemføringer er således 35 udformet, at én gennemføringshylsen omsluttende ydre kappemøtrik med en indre tragtformet stykke ligger an mod fra 3In case an appliance housing is provided with more than 30 bushings, these are often so tight that it can be difficult and time consuming with a tool to tighten a nut. This means that the seals in the feed-through are often faulty. Also known are bushings of the so-called tightening type, which bushings are designed so that one bushing enclosing outer casing nut with an inner funnel-shaped piece abuts from 3

DK 159702 BDK 159702 B

hylsen udgående aksial rettede fingre, som omgiver en rørformet gummitætning, som ved kappemøtrikkens tilspænding presses i retning mod et gennem gennemføringen trukket kabel. Udover, at disse gennemføringer kun kan virke indenfor små 5 diameterintervaller, kræver de en kraftig tilspænding af kappemøtrikken for tilvejebringelse af en egnet tætning og trækaflastning.the sleeve extending axially directed fingers, which surround a tubular rubber seal which, at the tightening of the cutting nut, is pressed in the direction of a cable pulled through the passage. In addition to the fact that these bushings can only operate within small diameter ranges, they require a strong tightening of the sheath nut to provide a suitable seal and tensile relief.

Det er formålet med opfindelsen at tilvejebringe en gennemføring, som fjerner ovenfor omtalte ulemper, dvs. en 10 gennemføring, som ikke kræver individuel tilpasning af pakningsstørrelsen til kablet, men som tilvejebringer god tætning i tilknytning til kabler, som ligger indenfor et stort diameterinterval, og dette uafhængig af møtrikkens tilspæn-dingsgrad, idet forskruningen skal kunne tilspændes let og 15 skal kunne tilspændes i egent grad med hånden uden anvendelse af værktøj.It is the object of the invention to provide an embodiment which removes the disadvantages mentioned above, i.e. a feedthrough which does not require individual fitting of the packing size to the cable, but which provides good sealing in connection with cables which are within a large diameter range, this independently of the tightening degree of the nut, which must be able to tighten the screw easily and be able to are tightened by hand without the use of tools.

Det angivne formål opnås med en forskruning af den indledningsvis omhandlede art, som ifølge opfindelsen er ejendommelig ved den i krav l's kendetegnende del angivne 20 udformning.The stated object is achieved with a screw of the type mentioned in the preamble, which according to the invention is characterized by the design according to the characterizing part of claim 1.

Der er således tilvejebragt en i gennemføringshylsen mod hylsens inderside tætnende elastisk tætningsnippel, som er udformet således, at den tilvejebringer en egnet tætning i tilknytning til i forskruningen indførte kabler, som ligger 25 indenfor et til forskruningen knyttet relativt stort diameterinterval, uafhængig af kappemøtrikkens tilspænding.Thus, there is provided a resilient sealing nipple sealing against the inside of the sleeve which is designed to provide a suitable seal in connection with the cables inserted within the socket, which is within a relatively large diameter range of the socket, independent of the cap nut.

Ved at adskille gennemføringens tætnende og trækaflastende funktioner fra hinanden, og ved udformningen af tætningsniplen, samt ved dennes fastlåste placering i hylsen, 30 opnås altid god tætning mellem kabel og gennemføring, uafhængig af, om kappemøtrikken er tilspændt eller ej. Dette er en væsentlig forbedring, eftersom erfaringerne viser, at et betydeligt antal monterede, kendte gennemføringer, ikke tætner i det forud fastsatte omfang, hvilket skyldes såvel 35 forglemmelse som vanskeligheder ved at komme til at tilspænde kappemøtrikken med et værktøj. Da der ved den foreliggende, 4By separating the sealing and tensile relief functions of the bushing from each other, and in designing the sealing nipple, as well as by its locked placement in the sleeve, good sealing between cable and bushing is always achieved, regardless of whether or not the sheath nut is tightened. This is a significant improvement, as experience shows that a significant number of assembled, known bushings do not seal to the predetermined extent, which is due to both forgetting and difficulty in tightening the cutting nut with a tool. Since in the present case, 4

DK 159702 BDK 159702 B

ved opfindelsen tilvejebragte gennemføring ved tilspænding af kappemøtrikken ikke frembringes nogen deformation af en tætnende pakning eller lignende organ, kan kappemøtrikken til låsning af kablet let tilspændes med hånden uden værktøj.provided by the invention that by tightening the sheath nut no deformation is caused by a sealing gasket or similar means, the sheath nut for locking the cable can be easily tightened by hand without tools.

5 Gennem sin særlige udformning virker gennemføringen indenfor et diameterinterval, hvor forholdet mellem mindste og største kabeldiameter er 1 til 3. Dette medfører, at en og samme gennemføring eksempelvis kan dække diameterintervallet 5-15 mm. Herigennem opnås en væsentlig reduktion af det nødvendige 10 sortiment af gennemføringer, samtidig med, at behovet for kabeltilpassede gummipakninger helt er fjernet.5 Through its special design, the feedthrough operates within a diameter range where the ratio of smallest to largest cable diameter is 1 to 3. This means that one and the same feedthrough can cover, for example, the diameter range 5-15 mm. This results in a substantial reduction of the required 10 assortment of bushings, while eliminating the need for cable-adapted rubber gaskets.

En eksempelvis udførelsesform af opfindelsen forklares i det følgende nærmere under henvisning til tegningen, på hvilken: 15 fig. 1 anskueliggør et aksialt snit gennem en gen nemføring, fig. 2 er en tegning i perspektiv af en gennemføring, med de enkelte dele fjernet indbyrdes fra hinanden.An exemplary embodiment of the invention is explained in more detail below with reference to the drawing, in which: FIG. 1 shows an axial section through a passage; FIG. 2 is a perspective view of an embodiment, with the individual parts spaced apart.

I det i fig. 1 anskueliggjorte aksiale snit gennem 20 en gennemføring, er 1 en hylse med et i det ene endestykke tilvejebragt gevind 2, til fastspænding af gennemføringen i et ikke vist apparathus. Hylsen 1 omgives delvis af en kappemøtrik 3, hvis indvendige gevind 4 er i indgreb med et på hylsens udvendige side udformet andet gevind 5. Kappemøtrik-25 ken 3, hvis udvendige side er rillet, indbefatter et indvendigt tragtformet stykke 6, som ligger an mod i hylsens andet endestykke udformede fingre 7, hvis frie ender ved kappemøtrikken 3's tilspænding er udformet til at kunne presses mod og fastholde et gennem gennemføringen trukket, 30 ikke vist kabel. Inden i hylsen 1 er placeret en af et elastisk materiale udformet tætningsnippel 8, som er udformet med et tragtformet stykke 11 omgivet af et hovedsageligt cylindrisk, rørformet stykke 9, som ligger tætnende an mod hylsens indvendige side, og mod et i hylsevæggen udformet 35 bryst 10.In the embodiment of FIG. 1 illustrated in axial section through a passageway, 1 is a sleeve having a thread 2 provided in one end piece for clamping the passageway in a housing not shown. The sleeve 1 is partially surrounded by a cap nut 3, the internal thread 4 of which engages a second thread formed on the outer side of the sleeve 5. The cap nut 25, the outer side of which is grooved, includes an inner funnel-shaped piece 6 which abuts against fingers 7 formed in the other end piece of the sleeve, the free ends of which are tightened at the tightening of the cutting nut 3 to be able to be pressed against and hold a cable not shown through the passage 30. Inside the sleeve 1 is placed a sealing nipple 8 formed of a resilient material, which is formed with a funnel-shaped piece 11 surrounded by a substantially cylindrical tubular piece 9, which seals against the inside of the sleeve and against a chest formed in the sleeve wall. 10th

Idet fingrene 7 ved tilspænding af kappemøtrikken 6 5Taking fingers 7 by tightening the cutting nut 6 5

DK 159702 BDK 159702 B

bøjes over taetningsniplen 8's kant, presses tætningsniplen mod brystet 10 og ligger med tryk an herimod.bend over the edge of the sealing nipple 8, the sealing nipple is pressed against the chest 10 and is pressed against it.

I fig. 2, som i perspektiv viser en gennemføring, med de enkelte dele fjernet fra hinanden, er anvendt de 5 samme benævnelser, som i fig. 1. Som det ses i fig. 2, indbefatter gennemføringen et polygonalt stykke 13, som ved sin udformning kan bevirke, at gennemføringens fastgørelse til et apparathus er nemmere at udføre.In FIG. 2, which shows in perspective a penetration, with the individual parts removed from each other, the same terms are used as in fig. 1. As seen in FIG. 2, the insert includes a polygonal piece 13 which, in its design, can make the attachment of the insert to an apparatus housing easier to execute.

Claims (2)

1. Tætnende og trækaflastende forskruning til gennemføring af elektriske kabler i huse til elektriske apparater af forskellige arter, hvilken forskruning indbefatter 5 en rørformet hylse (1) med et i hylsens ene endestykke udformet ydre gevind (2) til fastgørelse af forskruningen i et apparathus eller lignende organ, og en hylsen delvis omgivende, og med et andet på hylsens yderside udformet gevind (5) i indgreb stående kappemøtrik (3), hvilken kap-10 pemøtrik med et indvendigt tragtformet stykke (6) ligger an mod i hylsens andet endestykke udformede fingre (7), hvilke fingre ved kappemøtrikkens (3) tilspænding presses mod og griber fat i et gennem forskruningen ført kabel, idet kablet endvidere føres igennem en i hylsen (1) tilvejebragt elastisk 15 tætningsnippel (8), kendetegnet ved, at den trækaflastende og den tætnende funktion er adskilt gennem tæt-ningsniplens (8) placering i hylsen (1), idet fingrenes (7) frie endestykker i monteringsfasen kan føres udad således at der gøres plads til indføring af den med en lille over-20 dimension tilvejebragte tætningsnippel (8) uden anvendelse af værktøj, hvorved tætningsniplen (8) komprimeres på tværs og ligger tætnende an mod den rørformede hylses (1) indvendige overflade før tilspænding af kappemøtrikken (3), hvorhos tætningsniplen (8) indbefatter et tragtformet stykke 25 (11), som er omgivet af et hovedsageligt cylindrisk rørformet stykke (9) og med en ved det rørformede parti (9) tilvejebragt første kantflade ligger an mod et indvendigt i hylsen tilvejebragt bryst (10), idet tætningsniplen (8) ligger tætnende an mod et gennem tætningsniplen ført kabel før 30 tilspænding af kappemøtrikken (3).A sealing and tensile relieving screw for conducting electrical cables in houses of electrical appliances of various kinds, said screw including 5 a tubular sleeve (1) having an outer thread (2) formed in one end of the sleeve for securing the screw to an apparatus housing or similar means, and a sleeve partially surrounding, and with another thread (5) formed on the sleeve, engaging cap nut (3), the cap nut having an inner funnel-shaped piece (6) abutting in the sleeve's second end piece fingers (7), which fingers are pressed against and tightened by a tightening of the cable through the threaded nut (3), the cable further being passed through an elastic sealing nipple (8) provided in the sleeve (8), characterized in that the tension relieving and the sealing function is separated through the placement of the sealing nipple (8) in the sleeve (1), in that the free ends of the fingers (7) can be extended outwardly during the mounting phase. making room for inserting the sealing nipple (8) provided with a small over-dimension without the use of tools, whereby the sealing nipple (8) is compressed transversely and sealingly against the inner surface of the tubular sleeve (1) before tightening the cap nut (3), wherein the sealing nipple (8) includes a funnel-shaped piece (25) surrounded by a substantially cylindrical tubular piece (9) and with a first edge surface provided at the tubular portion (9) the sleeve (10), the sealing nipple (8) sealingly abutting against a cable passed through the sealing nipple prior to tightening the cutting nut (3). 2. Forskruning ifølge krav 1, kendetegnet ved, at fingrene (7) ved kappemøtrikkens (3) iskruning på hylsen (1) bøjes over en af tætningsniplens (8) rørformede stykke (9) indbefattet anden kantflade (12), hvorved det 35 rørformede parties (9) første kantflade påvirkes til anlæg med tryk mod brystet (10).A screwdriver according to claim 1, characterized in that the fingers (7) are bent at the sleeve (1) of the sleeve nip (8) tubular piece (9), including the second edge surface (12), by the tubular piece (12), whereby the tubular parties (9) first edge surface is affected for abutment pressures (10).
DK260486A 1984-10-04 1986-06-03 SUSPENSIVE AND TENSIVE RELIEF CABLE SCREW DK159702C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8404975 1984-10-04
SE8404975A SE463843B (en) 1984-10-04 1984-10-04 SUSPENSIVE AND TREASURY LOADING PRECAUTIONS FOR ELECTRICAL CABLES
SE8500374 1985-09-27
PCT/SE1985/000374 WO1986002209A1 (en) 1984-10-04 1985-09-27 A sealing and tension-relieving screw fitting for cables

Publications (4)

Publication Number Publication Date
DK260486D0 DK260486D0 (en) 1986-06-03
DK260486A DK260486A (en) 1986-06-03
DK159702B true DK159702B (en) 1990-11-19
DK159702C DK159702C (en) 1991-04-15

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DK260486A DK159702C (en) 1984-10-04 1986-06-03 SUSPENSIVE AND TENSIVE RELIEF CABLE SCREW

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EP (1) EP0196326A1 (en)
JP (1) JPS62500349A (en)
DK (1) DK159702C (en)
FI (1) FI83375C (en)
NO (1) NO169149C (en)
SE (1) SE463843B (en)
WO (1) WO1986002209A1 (en)

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DK260486D0 (en) 1986-06-03
WO1986002209A1 (en) 1986-04-10
FI83375B (en) 1991-03-15
NO169149C (en) 1992-05-13
FI862228A (en) 1986-05-27
JPS62500349A (en) 1987-02-05
DK159702C (en) 1991-04-15
SE463843B (en) 1991-01-28
FI862228A0 (en) 1986-05-27
SE8404975L (en) 1986-04-05
EP0196326A1 (en) 1986-10-08
DK260486A (en) 1986-06-03
FI83375C (en) 1991-06-25
NO862082L (en) 1986-05-26
SE8404975D0 (en) 1984-10-04
NO169149B (en) 1992-02-03

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