EP0234925B1 - Appareil de ventilation pour toiture de bâtiment - Google Patents

Appareil de ventilation pour toiture de bâtiment Download PDF

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Publication number
EP0234925B1
EP0234925B1 EP87301623A EP87301623A EP0234925B1 EP 0234925 B1 EP0234925 B1 EP 0234925B1 EP 87301623 A EP87301623 A EP 87301623A EP 87301623 A EP87301623 A EP 87301623A EP 0234925 B1 EP0234925 B1 EP 0234925B1
Authority
EP
European Patent Office
Prior art keywords
walls
reinforcing
locking
region
another
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
EP87301623A
Other languages
German (de)
English (en)
Other versions
EP0234925A3 (en
EP0234925A2 (fr
Inventor
Norbert Peters
Dietmar Daams
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.)
Colt International Holdings AG
Original Assignee
Colt International Holdings AG
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
Priority claimed from DE19863606563 external-priority patent/DE3606563A1/de
Priority claimed from DE19868605429 external-priority patent/DE8605429U1/de
Priority claimed from DE19868605430 external-priority patent/DE8605430U1/de
Application filed by Colt International Holdings AG filed Critical Colt International Holdings AG
Priority to AT87301623T priority Critical patent/ATE56526T1/de
Publication of EP0234925A2 publication Critical patent/EP0234925A2/fr
Publication of EP0234925A3 publication Critical patent/EP0234925A3/en
Application granted granted Critical
Publication of EP0234925B1 publication Critical patent/EP0234925B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/1486—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by bearings, pivots or hinges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F24F13/15—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre with parallel simultaneously tiltable lamellae

Definitions

  • the invention relates to a ventilation device for building roofs in a construction according to the preamble of claim 1, that is to say a ventilation device having lamellar flaps for weathering a ventilation opening, each consisting of an elongated, flat extruded hollow-section body of plastics material, particularly polycarbonate, which is provided, along its rear marginal edge with an inserted reinforcing tube having a flange extension at the bottom, along its front marginal edge with an inserted reinforcing section and at its underside with two added bearing blocks for a pivot drive.
  • the uniting of the local reinforcements extending longitudinally in the hollow-section body, through the bearing blocks, to form a reinforcing skeleton in the form of a frame not only increases the torsional rigidity of the flaps but also establishes a bond between the reinforcing parts at the same time, which is retained even in the event of softening or melting of the plastics material.
  • a ventilation device may have an outer housing having upright walls connected to one another in substantially right-angled corner joints.
  • Outer housings of this type are used as wind baffles and surround the ventilation opening defined by the main housing already mentioned.
  • the vertical walls of the outer housing generally situated opposite one another, parallel in pairs, usually consist of metal sheets which are provided with stiffening beads and which may be provided, at their upper and/or lower longitudinal edges, with folds as edge reinforcement and are connected to one another at their edges adjacent to one another in the corner joint.
  • the outer housing walls may be provided, at their ends, with connecting flanges in the region of which the walls are riveted or screwed together.
  • the known corner-joint connections presuppose special formations of the walls in the region of their end edges and involve not inconsiderable expense in making the connections as well as corresponding expense if the housing has to be dismantled, for example in the event of inspection work.
  • the separated connecting device which can be assembled by locking engagement of its parts, fixes the end edges in the corner joint of adjacent walls securely in relation to one another and only requires a few movements of the hand, which can be executed without a tool, for its fitting.
  • the connecting device is economical, reliable and does not require any special precautions to be taken on the walls themselves.
  • the ventilation device illustrated as a whole in Figure 1 is adapted for fitting to roofs, particularly flat roofs, of industrial, commercial or municipal buildings.
  • it comprises a base 1 in the form of a frame, an inner housing 2 disposed on this, defining a ventilation opening and having walls situated opposite one another, parallel to one another in pairs, of which only the walls 3 and 4 are illustrated, and a plurality of like lamellar flaps 5 which are pivotally movable about a parallel, stationary hinge axis by means of a drive device not illustrated.
  • the flaps 5 In the closed position illustrated, the flaps 5 jointly form a closing device which completely covers the ventilation opening in the inner housing 2 and protects it from atmospheric influences.
  • the ventilation device further comprises an outer housing 6 which forms a wind deflecting turret.
  • the outer housing 6 is in turn composed of plane- parallel walls 7, 8 and 9, 10 situated opposite one another, which consist of metal, particularly aluminium, and are connected to one another in the region of their comer joints 11 by means of a connecting device 12 in each case.
  • the walls 7, 8, 9, 10 which extend with spacing from the outer edges of the flaps 5 and form a narrow passage with the walls 3, 4 of the inner housing 2, are supported on the inner housing 2 in a suitable manner, for example inserted, with detent locking, in clips 13 at the outside of bearing blocks 14 for the support of the flaps 5.
  • the flaps 5 each comprise an extruded hollow-section body 102 which has an elongated, flat basic shape and consists of plastics material, particularly polycarbonate.
  • the plastics material may be made transparent or translucent if this is desired for reasons of general lighting.
  • the hollow-section body 102 which is divided into a plurality of compartments by internal webs 103, is provided along its rear marginal edge with an inserted reinforcing tube 105 having a flange extension 106 at the bottom. Extending along its front edge 107 in the hollow body 102 is an inserted reinforcing section 108 having a lower flange 109 which, like the flange extension 106, is aligned parallel to the bottom wall 110 of the hollow-section member 102.
  • the flap 5 is provided with two added bearing blocks 111 on which drive means for a pivotal movement of the flap act.
  • the bearing blocks 111 preferably consist of aluminium.
  • the bearing blocks 111 are disposed close to the ends of the hollow-section body 2, connected at their front end to the flange 109 of the reinforcing section 108 and at their rear end to the flange extension 106 of the reinforcing tube 105 and, with these, form a stiffening skeleton in the form of a frame.
  • the connecting members which are preferably constructed in the form of blind rivets, engage through passages 113 in the bottom wall 110 of the hollow-section body 102, the diameter of which passages considerably exceeds that of the connecting members 112.
  • a compensating gap is provided which permits a relative movement of the parts 106,109 or 111 in relation to the bottom wall 110.
  • the reinforcing parts 105, 106, 108, 109 may advantageously be supported in their compartments in the hollow-section body 102 by means of supporting ribs 114 which are formed on the inside of the compartments and the apex of which predetermines a substantially linear supporting engagement for the reinforcing parts. This facilitates relative movements of the parts 106 and 111 or 109 and 111 in relation to the bottom wall 110 in the region of the blind rivets 112.
  • the hollow-section body 102 is closed at its ends by separate end members 115 which are fitted to the ends of the hollow-section body 102.
  • Each flap 5 comprises a bottom wall 151, a region 161 in the form of a portion of a cylinder, receiving the pivot-axis construction along its rear edge, a covering wall 171 and a reduced region 181 in the form of a portion of a cylinder along its front edge, which region 181 receives a region 161 of an adjacednt flap 5 in the closed position of the flaps 5 illustrated in Figures 6 and 7.
  • a web-shaped extension 191 which, at the top, forms a trough 201 for the reception of a seal, not illustrated, which can be fixed in an anchoring groove 211 in the region 181,
  • the flap 5 Adjacent to the region 161 and below the extension 191, the flap 5 comprises, at its top, a collecting channel and gutter 221 for water, disposed in a cross-sectional constriction.
  • Adjacent to this collecting channel and gutter 221 is the covering wall 171, the surface of which first rises comparatively steeply, for example at an angle of 30 ° , in an initial portion 231 adjacent to the bottom of the collecting channel and gutter 221, changes over into a main portion 241 rising comparatively gently, for example under 2 ° , and ends, beyond a culmination line 251, in an end portion 261 bent slightly downwards.
  • the flap 5 comprises an end wall 271 which extends downwards beyond the bottom wall 151 and which may be formed on a separate end wall portion 281 added in each case.
  • the end walls 271 extend parallel to one another in an initial portion 291 in the region of the rear marginal edge, diverge in a main portion 301 following towards the front marginal edge of the flap 5 and again extend parallel to one another in an end portion 311.
  • an upright deflector lip 321 which extends parallel to the collecting channel and gutter 221 and projects with each of its ends 331 beyond the end walls 271 of the flap 5.
  • the deflector lip 321 is disposed substantially in the middle of the initial portion 231 of the surface of the covering wall 171 and comprises a lower base region 341 aligned vertically in the closed position of its flap 5 and an upper marginal region 351 which is curved in the form of an arc towards the main portion 241 of the surface of the covering wall 171.
  • the free marginal edge 361 of the deflector lip lies at least at the same height as the culmination line 251 of the surface of the covering wall 271 but may also project upwards beyond this and form the highest part of the flap 5 in the closed position.
  • each flap Provided at the outside of the end walls 271 of each flap is a deflector rib 371 which, at the side adjacent to the hinge axis, extends obliquely downwards past the outlet of the collecting channel and gutter 221.
  • This deflector rib 371 ensures that water running off along the end wall 271 is deflected downwards towards the lower marginal edge of the end walls 271 before reaching the bearing region.
  • each flap 5 is provided, in the front corner regions, with a deflector web 381 which adjoins the front marginal edge 391 of the covering wall 7 and the front marginal edge 401 of the end wall 271 and extends downwards in the form of an arc along the front marginal edge 401 of the end wall 271.
  • This deflector web 381 shields the bearing region of the flaps 5, particularly as it ends with its inner edge 411 only a short distance away from the initial portion 291 of the end wall of an adjacent flap 5, which portion is associated with it in the closed position of the flaps 5.
  • the spacing between the inner edge 411 and the opposite initial portion 291 of the end wall 271 of an adjacent flap 5 corresponds substantially to the height of the deflector rib 371, and the ends 331 of the deflector lip 321 project in a region in front of the front face of the deflector web 381 so that the deflector webs 381 also contribute towards deflecting water running out of the channel formed by the deflector lip 321 towards the lower edge of the end wall 271 of the flap 5 and deflecting it away from the bearing region.
  • the connecting device 12 consists of an outer portion 15 and an inner portion 16 which can be engaged with this to form a locked unit.
  • Both portions 15, 16 of the connecting device 12 are preferably injection moulded from plastics material.
  • the outer portion 15 is constructed in the form of an angle member 17 extending over the height of the wall and engages under and behind the lower edges of the two adjacent walls in the corner joint 11, for example the walls 8, 10 in Figure 2, with a foot portion formed thereon.
  • the angle member 17 is provided with a detent pin 20 aligned diagonally in relation to the angle of the corner joint 11 and projecting inwards.
  • the inner portion 16 comprises an extension 21 which engages, at the inside in the upper region, behind the adjacent walls (8, 10 in Figure 2) in the corner joint 11 and has a detent aperture 22 receiving the detent pin 20 with a locking action.
  • the inner portion also comprises a plate 25 which is made integral with the extension and engages over the upper edges 23, 24 of the walls 8, 10 and which is equipped with downwardly projecting locking attachments 26, 27 at its underside.
  • the inner portion 16 is first superimposed or inserted in a vertical downward movement, after which the foot portion 18 is first brought into its locking position at the inside behind the lower edges of the walls 8, in the region of the corner joint 11 by an upward movement of the outer portion 15.
  • the outer and inner portions 15, 16 are joined together by a diagonally directed pivotal movement of the outer portion 15 during which the detent pin 20 enters the detent aperture 22 and mutually locates the portions 15, 16.
  • the plate 25 of the inner portion 16 and the head portion 19 of the outer portion 15 adjoin one another positively along their upper marginal edges 29 and 30 in their connected position.
  • the ventilation device described with reference to the drawings is better secured against the overflow of water from the outside of the device into the ventilation opening.
  • the deflector lips intercept accumulations of water running down or shooting down or drops of water thrown off when the flaps 5 are opened and drain them off to the outside of the ventilation device so that water does not enter the interior of the building either as a result of the collecting channel and gutter, which usually has only a small cross-sectional area of flow, overflowing or as a result of dripping action.
  • the deflector lip 321 not only forms a deflector element for water and to some extent a preliminary collecting channel and gutter but also a deflector element for wind which prevents the build-up of wind pressure in the overlapping region between two flaps 5, which might drive water out of the collecting channel 221 and gutter towards the seal 201 in the overlapping region. Therefore, the ventilation device described with reference to the drawings offers increased imperviousness in the overlapping range even in the closed position of its flaps 5.

Claims (12)

1. Dispositif de ventilation pour des toitures de bâtiments, comportant un boîtier (2) définissant une ouverture de ventilation et dont les parois (3, 4) sont opposées les unes aux autres, en paires de parois parallèles, et une pluralité de volets lamellaires similaires (5) qui sont montés à pivotement autour d'un axe d'articulation fixe parallèle (61), au moyen d'un dispositif d'entraînement, qui, dans leur position fermée, se chevauchent les uns les autres dans une direction transversale par rapport à leurs axes d'articulation (61), qui sont en contact sur les parois (3, 4) du boîtier (2) les portant, à l'endroit de leurs bords supérieurs, et qui recouvrent complètement l'ouverture de ventilation dans le boîtier (2) et la protègent à l'encontre de l'entrée de l'atmosphère, chaque volet (5) étant pourvu, à ses extrémités, d'une paroi frontale (271) s'étendant vers le bas au-delà de la paroi inférieure (15) du volet (5), chacun des volets lamellaires (5) étant constitué par un corps creux extrudé (102), plat, allongé, en matière plastique, en particulier en polycarbonate, lequel est pourvu, le long de son bord postérieur (104), d'un tube de renfort inséré (105) présentant un prolongement en forme d'aile (106) à sa partie inférieure, le long de son bord antérieur (107), d'un profilé de renfort inséré (108) et, sur sa face inférieure, de deux blocs paliers ajoutés (112) pour un dispositif d'entraînement à mouvement de pivotement, caractérisé en ce que les blocs paliers (111) sont disposés à proximité des extrémités du corps creux (102) et sont reliés, à l'endroit de leur extrémité antérieure, au profilé de renfort (108, 109) et, à l'endroit de leur extrémité postérieure, au prolongement en forme d'aile (106) du tube de renfort (105), afin de constituer un squelette de renforcement sous la forme d'un cadre.
2. Dispositif suivant la revendication 1 caractérisé en ce que les organes de liaison (112) pour les éléments de renfort (105, 106, 108, 109, 111) passent à travers des trous (113) dans la paroi inférieure (110) du corps creux (102), trous dont le diamètre est notablement supérieur à celui des organes de liaison (112).
3. Dispositif suivant la revendication 2 caractérisé en ce que les éléments de renfort (105, 106, 108, 109) sont supportés, dans leurs compartiments dans le corps creux (102), au moyen de nervures de support (114) qui sont formées à l'intérieur des compartiments et dont les arêtes prédéterminent un contact de support sensiblement linéaire.
4. Dispositif suivant l'une quelconque des revendications 1 à 3 caractérisé en ce que des rivets borgnes sont prévus en tant qu'organes de liaison.
5. Dispositif suivant l'une quelconque des revendications précédentes caractérisé en ce que les éléments (105,106,108,109,111 ) du squelette de renforcement sont réalisés en aluminium.
6. Dispositif suivant l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte une enveloppe externe comprenant des parois verticales (7, 8; 9, 10) reliées les unes aux autres par des joints sensiblement à angle droit (11), et un dispositif de connexion (12) constitué d'une portion externe (15) et d'une portion interne (16) qui peuvent être amenés en contact à verrouillage, pour assurer la liaison des parois.
7. Dispositif suivant la revendication 6 caractérisé en ce que les portions (15, 16) du dispositif de connexion (12) sont en matière plastique moulée par injection.
8. Dispositif suivant l'une quelconque des revendications 6 ou 7 caractérisé en ce que la portion externe (15) est réalisée sous forme d'une cornière (17) qui s'étend sur la hauteur de la paroi et qui s'engage, avec une action de verrouillage, en-dessous et au-delà des bords inférieurs des deux parois adjacentes (par exemple 8, 10) dans le joint d'angle (11), à la manière d'un crochet, par une portion de pied (18) formée sur cette portion, et qui est pourvue dans une région supérieure de tête, d'un doigt élastique (20) aligné en diagonale par rapport au joint d'angle (11) et faisant saillie vers l'intérieur.
9. Dispositif suivant l'une quelconque des revendications 6, 7 ou 8 caractérisé en ce que la portion interne (16) comprend un prolongement (21) qui s'engage, au-delà des parois adjacentes (8, 10), dans le joint d'angle (11 à l'intérieur de la région supérieure et qui présente une ouverture (22) recevant le doigt élastique (20) avec une action de verrouillage, et en ce que la portion interne comprend une platine (25) venant en contact sur les bords supérieurs (par exemple 23, 24) des parois (par exemple 8, 10) et comportant des organes de fixation à verrouillage (26, 27) faisant saillie vers le bas.
10. Dispositif suivant la revendication 9 caractérisé en ce que deux organes de fixation à verrouillage (26) s'engagent dans des ouvertures de verrouillage (28) prévues dans les bords supérieurs (par exemple 23, 24) des parois (par exemple 8, 10) à l'endroit de chaque côté du joint d'angle (11 ), dans la position connectée des portions (15, 16).
11. Dispositif suivant l'une quelconque des revendications 9 ou 10 caractérisé en ce qu'un autre organe de fixation à verrouillage (27) s'engage au-delà des parois (par exemple 8, 10) dans la région supérieure de l'angle, à l'extérieur.
12. Dispositif suivant l'une quelconque des revendications 8 à 11 caractérisé en ce que la platine (25) de la portion interne (16) et la portion de tête (19) de la portion externe (15) sont jointes l'une à l'autre d'une manière positive, le long de bords (29, 30) adjacents l'un à l'autre, dans la position connectée.
EP87301623A 1986-02-28 1987-02-25 Appareil de ventilation pour toiture de bâtiment Expired - Lifetime EP0234925B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87301623T ATE56526T1 (de) 1986-02-28 1987-02-25 Lueftungsvorrichtung fuer daecher von gebaeuden.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19863606563 DE3606563A1 (de) 1986-02-28 1986-02-28 Belueftungsvorrichtung fuer gebaeudedaecher
DE8605430U 1986-02-28
DE8605429U 1986-02-28
DE3606563 1986-02-28
DE19868605429 DE8605429U1 (de) 1986-02-28 1986-02-28 Außengehäuse für Belüftungsvorrichtungen, insbesondere Dachlüfter
DE19868605430 DE8605430U1 (de) 1986-02-28 1986-02-28 Verschlußlamelle für Belüftungsvorrichtungen, insbesondere Dachlüfter

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP88200505.1 Division-Into 1987-02-25

Publications (3)

Publication Number Publication Date
EP0234925A2 EP0234925A2 (fr) 1987-09-02
EP0234925A3 EP0234925A3 (en) 1987-11-11
EP0234925B1 true EP0234925B1 (fr) 1990-09-12

Family

ID=27194076

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87301623A Expired - Lifetime EP0234925B1 (fr) 1986-02-28 1987-02-25 Appareil de ventilation pour toiture de bâtiment
EP88200505A Expired - Lifetime EP0311153B1 (fr) 1986-02-28 1987-02-25 Appareil de ventilation pour toiture de bâtiment

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88200505A Expired - Lifetime EP0311153B1 (fr) 1986-02-28 1987-02-25 Appareil de ventilation pour toiture de bâtiment

Country Status (4)

Country Link
EP (2) EP0234925B1 (fr)
AU (1) AU593614B2 (fr)
DE (2) DE3764960D1 (fr)
NZ (1) NZ219383A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3841349A1 (de) * 1988-12-08 1990-06-13 Colt Int Holdings Dachluefter
DE8910185U1 (fr) * 1989-08-25 1989-11-16 Hermann Rappold & Co Gmbh, 5160 Dueren, De
FR2853049A1 (fr) * 2003-03-24 2004-10-01 Souchier Sa Appareil pour l'admission d'air frais et/ou le desenfumage d'un local

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2145569A (en) * 1937-07-13 1939-01-31 Lloyd M Jones Awning shutter
US2532401A (en) * 1946-11-14 1950-12-05 Roland D Goodwin Metal variable shutter awning
US3591980A (en) * 1969-02-14 1971-07-13 Hong Kong Chiap Hua Mfg Co 194 Louvre arrangements
US3605603A (en) * 1969-11-12 1971-09-20 Francis J Mccabe Damper construction
US3908529A (en) * 1973-04-26 1975-09-30 Francis J Mccabe Backdraft damper
FR2371208A1 (fr) * 1976-11-17 1978-06-16 Panol Grille d'aeration
FR2382554A1 (fr) * 1977-03-02 1978-09-29 Souchier Georges Dispositif d'evacuation des fumees, notamment pour locaux industriels
IT1093100B (it) * 1980-11-19 1985-07-19 Mazzocco Antonio Persiana con alette orientabili,a chiusura ermetica
GB2120775B (en) * 1982-04-15 1985-11-13 Mckenzie Martin Limited Louvre assemblies
DE8236152U1 (de) * 1982-12-23 1983-06-09 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Luftklappe für eine Heizungsanlage oder eine Klimaanlage, insbesondere eines Kraftfahrzeuges
ATE25536T1 (de) * 1983-03-10 1987-03-15 Futura Aluminium Systems Metallischer laden hergestellt aus zusammensetzbaren elementen.

Also Published As

Publication number Publication date
AU6923787A (en) 1987-09-03
DE3764823D1 (de) 1990-10-18
DE3764960D1 (de) 1990-10-18
EP0234925A3 (en) 1987-11-11
NZ219383A (en) 1988-10-28
AU593614B2 (en) 1990-02-15
EP0311153A2 (fr) 1989-04-12
EP0234925A2 (fr) 1987-09-02
EP0311153A3 (en) 1989-06-28
EP0311153B1 (fr) 1990-09-12

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