FR2474345A1 - Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube - Google Patents

Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube Download PDF

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Publication number
FR2474345A1
FR2474345A1 FR8001759A FR8001759A FR2474345A1 FR 2474345 A1 FR2474345 A1 FR 2474345A1 FR 8001759 A FR8001759 A FR 8001759A FR 8001759 A FR8001759 A FR 8001759A FR 2474345 A1 FR2474345 A1 FR 2474345A1
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FR
France
Prior art keywords
sprayer according
disc
blower
barrel
spraying member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8001759A
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French (fr)
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FR2474345B1 (en
Inventor
Vincent Pierre Marie Ballu
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.)
Tecnoma SA
Original Assignee
Tecnoma SA
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 Tecnoma SA filed Critical Tecnoma SA
Priority to FR8001759A priority Critical patent/FR2474345A1/en
Priority to BR8100436A priority patent/BR8100436A/en
Priority to ES498849A priority patent/ES8203644A1/en
Priority to ZA00810542A priority patent/ZA81542B/en
Publication of FR2474345A1 publication Critical patent/FR2474345A1/en
Application granted granted Critical
Publication of FR2474345B1 publication Critical patent/FR2474345B1/fr
Granted legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/105—Fan or ventilator arrangements therefor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/0003—Atomisers or mist blowers
    • A01M7/0014—Field atomisers, e.g. orchard atomisers, self-propelled, drawn or tractor-mounted

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Nozzles (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The atomiser for producing a spray of liquid in an air stream, suitable for treatment of cultures, has a rotary distributor disc (30) supported in front of a fan (2). The fan is mounted inside a shroud (5) with a spherical outside surface carrying a duct (25) enclosing the disc, so that the shroud can be tilted at an angle. The disc is mounted on a spindle (21) with its other end in contact with the hub (8) of the fan rotor. Mounted on the discharge side of the hub is a ring (13) coated with a friction material layer (14) so as to drive a boss (16) on the end of the spindle. This rotates inside a sleeve with a spring (23) attached to it and attached at the other end to the shroud, so that the spindle can be supported at any angle.

Description

La présente invention se rapporte aux pulvérisateurs à jet porté, c'est-à-dire à des pulvérisateurs dans lesquels le produit qui doit être pulvérisé est introduit, à l'état divisé, dans un courant d'air qui l'entrain vers l'endroit où il doit être répandu. De tels pulvérisateurs sont, notamment, utilisés pour le traitement des cultures
L'invention a, entre autres, pour objectif de créer un pulvérisateur de ce genre qui assure une distribution régulière du produit et permette de traiter des surfaces importantes même avec un débit volumétrique d'air et de produit relativement bas.The present invention relates to mounted jet sprayers, that is to say sprayers in which the product which is to be sprayed is introduced, in the divided state, into a stream of air which drives it towards the place where it should be spread. Such sprayers are, in particular, used for the treatment of crops
The invention aims, inter alia, to create a sprayer of this kind which ensures a regular distribution of the product and makes it possible to treat large surfaces even with a relatively low volumetric flow rate of air and product.

Le pulvérisateur objet de l'invention comprend essentiellement, dune manière connue en soi, un canal dans lequel une soufflerie rotative, par exemple une turbine hélicoide, engendre un courant d'air et un dispositif servant à introduire du liquide pulvérisé dans ce courant d'air. Selon l'invention, le dispositif d'introduction de liquide comporte un organe de pulvérisation rotatif, par exemple à plateau centrifuge, entraîné en rotation par l'intermédiaire de la soufflerie. The sprayer which is the subject of the invention essentially comprises, in a manner known per se, a channel in which a rotary blower, for example a helical turbine, generates a stream of air and a device serving to introduce sprayed liquid into this stream of air. According to the invention, the liquid introduction device comprises a rotary spraying member, for example with a centrifugal plate, driven in rotation by the blower.

Avantageusement, le canal est prolongé par un canon orientable dans lequel est monté le support de l'organe de pulvérisation rotatif et du mécanisme de transmission reliant la soufflerie et ledit organe de pulvérisation. Advantageously, the channel is extended by an orientable barrel in which is mounted the support for the rotary spraying member and the transmission mechanism connecting the blower and said spraying member.

Ladite transmission comporte, de préférence, une portée de friction tournant avec la soufflerie et un galet de friction entraînant organe de pulvérisation, ces deux organes de friction étant maintenus en contact mutuel par une force de rappel élastique. Said transmission preferably comprises a friction surface rotating with the blower and a friction roller driving the spraying member, these two friction members being held in mutual contact by an elastic restoring force.

Avantageusement, le canal et le canon sont assemblés au moyen d'un joint sphérique dont le centre est voisin de l'endroit où sont situés la portée et le galet de friction. Advantageously, the channel and the barrel are assembled by means of a spherical joint whose center is close to the place where the bearing surface and the friction roller are located.

La description qui va suivre, en regard du dessin annexé donné à titre d'exemple non limitatif, fera bien comprendre comment l'invention est réalisée, les particularités qui ressortent, tant du dessin que du texte, faisant, bien entendu, partie de ladite invention. The description which follows, with reference to the appended drawing given by way of nonlimiting example, will make it clear how the invention is implemented, the features which emerge, both from the drawing and from the text, forming, of course, part of said invention.

La figure 1 est une vue en coupe longitudinale dgun pulvérisateur conforme à l'invention.  Figure 1 is a longitudinal sectional view of a sprayer according to the invention.

la figure 2 est une vue partielle en coupe longitudinale montrant le mécanisme dgentrainement de la tête de pulvérisation. Figure 2 is a partial view in longitudinal section showing the drive mechanism of the spray head.

1a figure 3 est une vue analogue à la précédente, mais relative à la tête de pulvérisation elle-même. FIG. 3 is a view similar to the previous one, but relating to the spray head itself.

Dans l'exemple de réalisation représenté sur le dessin, un pulvérisateur à jet porté est équipé d'une soufflerie comportant un anneau 1, cylindrique et à entrée convergente arrondie, dans lequel tourne une turbine hélicoïde 2 coaxiale audit anneau et sensiblement de même diamètre que celui-ci. L'arbre moteur 3 de la turbine est monté dans un palier 4, coaxial à 11 anneau 1. In the embodiment shown in the drawing, a mounted jet sprayer is equipped with a blower comprising a ring 1, cylindrical and with rounded converging inlet, in which a helical turbine 2 coaxial coaxial with said ring and substantially of the same diameter as this one. The motor shaft 3 of the turbine is mounted in a bearing 4, coaxial with 11 ring 1.

Ce dernier est adapté dans 11 entrée d'un canal 5, d'allure générale légèrement convergente en direction de la turbine 2 et dont la surface latérale externe 6 fait partie dune sphère dont le centre 7 est situé sur l'axe de la turbine, un peu en avant de celle-ci, dans le sens de refoulement de Il air, comme le montre la figure 1. The latter is adapted in 11 inlet of a channel 5, of general appearance slightly converging towards the turbine 2 and whose external lateral surface 6 is part of a sphere whose center 7 is located on the axis of the turbine, a little in front of it, in the direction of delivery of Il air, as shown in Figure 1.

En face du moyeu 8 de la turbine, le canal 5 contient un noyau cylindrique creux 9 sensiblement de même diamètre que ce moyeu et maintenu en place par des aubes directrices 10, le tout de façon à assurer un écoulement régulier de l'air dans le canal
Sur sa face tournée vers le noyau 9, le moyeu 8 de la turbine porte un plateau 11, fixé à l'aide de boulons 12 et comportant un prolongement tubulaire 13 coaxial à la turbine 20
le prolongement 13, qui pénètre à l'intérieur du noyau 9, est revêtu, sur sa face interne, d'une garniture de friction 14 que l'on voit mieux sur la figure 2. La garniture 14 s'incurve vers lSintérieur le long de la base du prolongement 13 et s'encastre par son bord opposé, convenablement renforcé et profilé, dans une rainure 15 de retenue, ménagée le long du bord du prolongement.Opposite the hub 8 of the turbine, the channel 5 contains a hollow cylindrical core 9 substantially of the same diameter as this hub and held in place by guide vanes 10, all so as to ensure a regular flow of air in the channel
On its face facing the core 9, the hub 8 of the turbine carries a plate 11, fixed by means of bolts 12 and comprising a tubular extension 13 coaxial with the turbine 20
the extension 13, which penetrates inside the core 9, is coated, on its internal face, with a friction lining 14 which is best seen in FIG. 2. The lining 14 curves inwardly along from the base of the extension 13 and is fitted by its opposite edge, suitably reinforced and profiled, in a retaining groove 15, formed along the edge of the extension.

Le prolongement 13 et sa garniture 14 servent à entrainer en rotation un galet de friction 16 dont la face extérieure 17 est partiellement sphérique et qui est maintenu appliqué élastiquement contre ladite garniture0
Ce galet, qui sert à faire tourner un organe de pulvérisation dont un exemple sera décrit plus loin, est fixé, comme le montre la figure 2, grâce à une vis 18, au bout d'un arbre 19 monté dans un roulement 20 à l'extrémité d1un support tubulaire 21.The extension 13 and its lining 14 serve to drive in rotation a friction roller 16 whose outer face 17 is partially spherical and which is kept applied elastically against said lining.
This roller, which is used to rotate a spraying member, an example of which will be described later, is fixed, as shown in FIG. 2, by means of a screw 18, at the end of a shaft 19 mounted in a bearing 20 to l end of a tubular support 21.

Le support 21 comporte une oreille 22 par laquelle il est attaché à un ressort de traction 23 qui assure l'application constante du galet 16 contre la garniture 14. The support 21 comprises an ear 22 by which it is attached to a tension spring 23 which ensures the constant application of the roller 16 against the lining 14.

A son autre extrémité, le ressort 23 est attaché, à l'aide d'un appui réglable 24, à un canon 25 constitué par une virole tubulaire qui s'adapte sur la surface sphérique 6 du canal 5 grâce à une portée complémentaire 26 dont elle est pourvue. At its other end, the spring 23 is attached, using an adjustable support 24, to a barrel 25 constituted by a tubular ferrule which adapts to the spherical surface 6 of the channel 5 thanks to a complementary bearing 26 of which it is provided.

Un vérin à vis 27, dont l'écrou est articulé à une patte 28 de la portée 26 et la tige à une patte 29 de anneau l, permet de modifier l'orientation du canon 25. A screw jack 27, the nut of which is articulated to a lug 28 of the bearing surface 26 and the rod to a lug 29 of the ring 1, makes it possible to modify the orientation of the barrel 25.

Quelle que soit l'orientation choisie, le galet 16, qui est situé à proximité du centre 7 de pivotement du canon, demeure en contact avec la garniture 14 du prolongement 13. De ce fait, l'arbre 19 se trouve entraîné en permanence par la turbine 2 à vitesse plus grande que celle-cio
Comme on le voit mieux sur la figure 3, ltar bre 19 porte, à son extrémité voisine de l'embouchure du canon 25, un plateau support 30 calé sur un embout tronconique 31 grâce à un ensemble rondelle-écrou et contre écrOU 32.Whatever the orientation chosen, the roller 16, which is located near the center 7 of pivoting of the barrel, remains in contact with the lining 14 of the extension 13. As a result, the shaft 19 is permanently driven by turbine 2 at higher speed than this
As can best be seen in FIG. 3, ltar bre 19 carries, at its end close to the mouth of the barrel 25, a support plate 30 wedged on a frustoconical end piece 31 by virtue of a washer-nut and lock nut 32 assembly.

112 embout 31 se prolonge, le long de l'arbre 19, dans un godet 53 dont il traverse le fond. Au voisinage de ce fond, l'embout 31 comporte une collerette 34 formant joint
1,1 arbre 19 est monté grâce à un roulement 35 dans un prolongement du support tubulaire 21 et ce dernier est articulé à l2aide d'une oreille 36, à un axe transversal 37 du canon 25.112 end piece 31 is extended, along the shaft 19, in a bucket 53 from which it crosses the bottom. In the vicinity of this bottom, the end piece 31 has a collar 34 forming a seal
1.1 shaft 19 is mounted by means of a bearing 35 in an extension of the tubular support 21 and the latter is articulated by means of an ear 36, to a transverse axis 37 of the barrel 25.

d prolongement
A 11 extrémité du support tubulaire 21 est fixé, au moyen de boulons 38, un dispositif 39 d'alimentation en liquide dont fait partie le godet 33 et qui comporte en outre une tubulure de raccordement 40 aboutissant à une rainure annulaire 41 qui entoure le godet 33. le plateau 30, qui a la forme d'un cône largement ouvert vers l'avant, comporte, sur sa face dorsale, des supports 42 pour un disque de pulvérisation 43.Ce dernier présente une portion interne tronconique qui entoure la paroi externe de la rainure 41 et se prolonge au-delà du bord du plateau support 30 pour former un passage 44 dSépais seur décroissante et se terminer par un rebord 45, galet ment tronconique9 mais d'angle au sommet plus réduits
Le liquide est amené, par la rainure 41, dans le passage 44, où la force centrifuge le plaque sur le disque 43, de façon à le pulvériser en une=nappe tronconique, centrée sur le courant d'air créé par la turbine 2 dans le canon orientable 25. Quelle que soit l'orientation choisie, la distribution du liquide pulvérisé est excellente.d extension
At the end of the tubular support 21 is fixed, by means of bolts 38, a device 39 for supplying liquid, of which the cup 33 is a part, and which further comprises a connecting pipe 40 ending in an annular groove 41 which surrounds the cup. 33. the plate 30, which has the shape of a cone widely open towards the front, comprises, on its dorsal face, supports 42 for a spraying disc 43. The latter has a frustoconical internal portion which surrounds the external wall of the groove 41 and extends beyond the edge of the support plate 30 to form a passage 44 dDepressing thickness and ending in a flange 45, roller frustoconical9 but of angle at the top more reduced
The liquid is brought, by the groove 41, in the passage 44, where the centrifugal force the plate on the disc 43, so as to spray it into a = frustoconical sheet, centered on the air stream created by the turbine 2 in the adjustable barrel 25. Whatever the orientation chosen, the distribution of the sprayed liquid is excellent.

xe rebord 45 du disque de pulvérisation 43 peut être éventuellement dentelé pourrégulariser la distribution spatiale des gouttes résultant de la pulvérisation de la nappe liquide. xe rim 45 of the spraying disc 43 can optionally be serrated to regularize the spatial distribution of the drops resulting from the spraying of the liquid sheet.

il va de soi que le mode de réalisation décrit n'a été donné qu'à titre d'exemple et qu'on pourrait le modifier, notamment par substitution d'équivalents techniques, sans que l'on sorte pour cela du cadre de la présente invention.  It goes without saying that the embodiment described has only been given by way of example and that it could be modified, in particular by substitution of technical equivalents, without going beyond the ambit of the present invention.

Claims (6)

REVENDICA2IONS 1. Pulvérisateur à jet porté, comportant un canaldans lequel une soufflerie rotative engendre un courant d'air, et un dispositif servant à introduire du liquide pulvérisé dans ce courant deair, caractérisé en ce que le dispositif d'introduction de liquide (39) comporte un organe de pulvérisation rotatif (41in entrainé en rotation par l'intermédiaire de la soufflerie (2).1. Mounted jet sprayer, comprising a channel in which a rotary blower generates an air stream, and a device for introducing sprayed liquid into this air stream, characterized in that the liquid introduction device (39) comprises a rotary spraying member (41in rotated by means of the blower (2). 2. Pulvérisateur selon la revendication 1, caractérisé en ce que le canal (5) est prolongé par un canon orientable (25) dans lequel est monté le support (21) de l'organe de pulvérisation (43) et du mécanisme de transmission (16, 19) reliant la soufflerie (2) -audit organe de pulvérisation (43).2. Sprayer according to claim 1, characterized in that the channel (5) is extended by an adjustable barrel (25) in which is mounted the support (21) of the spraying member (43) and of the transmission mechanism ( 16, 19) connecting the blower (2) -audit spraying member (43). 3. Pulvérisateur selon la revendication 2, caractérisé en ce que la transmission du mouvement entre la soufflerie (2) et l'organe de pulvérisation (43) comporte une portée de friction (14) tournant avec la soufflerie et un galet de friction (16) monté sur l'arbre (19) de l'organe de pulvérisation, les deux organes de friction (14 et 16) étant maintenus en contact mutuel par une force de rappel élastique 4. Pulvérisateur selon la revendication 3, caractérisé en ce que le support (21) est tubulaire et articulé, au voisinage de son extrémité portant l'organe de pulvérisation (43), au canon (25) et, en un point intermédiaire (22), à un ressort (23) attaché au canon (25) et assurant la force de rappel élastique.5.Pulvérisateur selon l'une des revendications 3 et 4, caractérisé en ce que la soufflerie (2) comporte une turbine hélicoide montée dans le canal (5) et dont le moyeu (b) porte un prolongement (13) supportant la portée de friction (14).3. Sprayer according to claim 2, characterized in that the transmission of movement between the blower (2) and the spraying member (43) comprises a friction surface (14) rotating with the blower and a friction roller (16 ) mounted on the shaft (19) of the spraying member, the two friction members (14 and 16) being held in mutual contact by an elastic restoring force 4. Sprayer according to claim 3, characterized in that the support (21) is tubular and articulated, near its end carrying the spraying member (43), to the barrel (25) and, at an intermediate point (22), to a spring (23) attached to the barrel (25 ) and ensuring the elastic return force. 5. A sprayer according to one of claims 3 and 4, characterized in that the blower (2) comprises a helical turbine mounted in the channel (5) and the hub (b) of which carries an extension (13) supporting the friction surface (14). 6. Pulvérisateur selon la revendication 5, caractérisé en ce que le prolongement (13) est tubulaire, la portée de friction (14) étant prévue sur la face interne dudit prolongement.6. Sprayer according to claim 5, characterized in that the extension (13) is tubular, the friction surface (14) being provided on the internal face of said extension. 7. Pulvérisateur selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le canal (5) présente une portée externe sphérique (6) sur laquelle peut glisser une portée complémentaire (26) du canon, des moyens (27-29) étant prévus pour régler l'orienta- tion du canon.7. Sprayer according to any one of claims 3 to 6, characterized in that the channel (5) has a spherical outer surface (6) on which can slide a complementary surface (26) of the barrel, means (27-29 ) being designed to adjust the orientation of the barrel. Pulvérisateur selon la revendication 7, caractérisé en ce que le centre (7)des portées sphériques (6, 26) est voisin de l'endroit où sont situés la portée (14) et le galet (16) de friction. Sprayer according to claim 7, characterized in that the center (7) of the spherical bearings (6, 26) is close to the place where the bearing (14) and the friction roller (16) are located. 90 Pulvérisateur selon l'une quelconque des revendications 1 à 8, caractérisé en ce que organe de pulvérisation rotatif comporte un disque de pulvérisation (43) associé à un dispositif d'alimentation en liquide (39) qui présente un distributeur annulaire (41) conduisant le liquide au disque (43) entre ce dernier et un plateau support (30) qui tourne avec lui. 90 sprayer according to any one of claims 1 to 8, characterized in that the rotary spraying member comprises a spraying disc (43) associated with a liquid supply device (39) which has an annular distributor (41) leading the liquid to the disc (43) between the latter and a support plate (30) which rotates with it. 10. Pulvérisateur selon la revendication 9, caractérisé en ce que le disque de pulvérisation (43) et le plateau support (30) sont tronconiques et délimitent entre eux un passage convergent (44), aboutissant à un rebord (45) du disque (43), également tronconique, mais d'angle au sommet plus réduit que celui du disque (43). 10. Sprayer according to claim 9, characterized in that the spraying disc (43) and the support plate (30) are frustoconical and delimit between them a converging passage (44), leading to a flange (45) of the disc (43 ), also tapered, but with a smaller angle at the top than that of the disc (43).
FR8001759A 1980-01-28 1980-01-28 Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube Granted FR2474345A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8001759A FR2474345A1 (en) 1980-01-28 1980-01-28 Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube
BR8100436A BR8100436A (en) 1980-01-28 1981-01-27 TRANSPORTED JET SPRAYER
ES498849A ES8203644A1 (en) 1980-01-28 1981-01-27 Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube
ZA00810542A ZA81542B (en) 1980-01-28 1981-01-27 Sprayer with a product in training air blast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8001759A FR2474345A1 (en) 1980-01-28 1980-01-28 Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube

Publications (2)

Publication Number Publication Date
FR2474345A1 true FR2474345A1 (en) 1981-07-31
FR2474345B1 FR2474345B1 (en) 1983-11-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8001759A Granted FR2474345A1 (en) 1980-01-28 1980-01-28 Liquid spray for culture treatment - has rotary distributor disc suspended at angle in front of fan inside adjustable jet tube

Country Status (4)

Country Link
BR (1) BR8100436A (en)
ES (1) ES8203644A1 (en)
FR (1) FR2474345A1 (en)
ZA (1) ZA81542B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508349A1 (en) * 1981-06-26 1982-12-31 Tecnoma SPRAY DEVICE, ESPECIALLY FOR PLANT TREATMENT
CN103091098A (en) * 2013-02-04 2013-05-08 农业部南京农业机械化研究所 Space fog amount distribution testing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508349A1 (en) * 1981-06-26 1982-12-31 Tecnoma SPRAY DEVICE, ESPECIALLY FOR PLANT TREATMENT
US4465233A (en) * 1981-06-26 1984-08-14 Tecnoma Spraying device, particularly for treatment of plants
CN103091098A (en) * 2013-02-04 2013-05-08 农业部南京农业机械化研究所 Space fog amount distribution testing device

Also Published As

Publication number Publication date
FR2474345B1 (en) 1983-11-25
ZA81542B (en) 1982-03-31
BR8100436A (en) 1981-08-11
ES498849A0 (en) 1982-04-16
ES8203644A1 (en) 1982-04-16

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