EP0060857A1 - Self orientable snow fence or sand fence works. - Google Patents

Self orientable snow fence or sand fence works.

Info

Publication number
EP0060857A1
EP0060857A1 EP81902628A EP81902628A EP0060857A1 EP 0060857 A1 EP0060857 A1 EP 0060857A1 EP 81902628 A EP81902628 A EP 81902628A EP 81902628 A EP81902628 A EP 81902628A EP 0060857 A1 EP0060857 A1 EP 0060857A1
Authority
EP
European Patent Office
Prior art keywords
wind
self
ground clearance
screen
tube
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
EP81902628A
Other languages
German (de)
French (fr)
Other versions
EP0060857B1 (en
Inventor
Jean-Michel Taillandier
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT81902628T priority Critical patent/ATE9016T1/en
Publication of EP0060857A1 publication Critical patent/EP0060857A1/en
Application granted granted Critical
Publication of EP0060857B1 publication Critical patent/EP0060857B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0041—Free-standing grates
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/02—Snow fences or similar devices, e.g. devices affording protection against sand drifts or side-wind effects
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
    • E01F9/65—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection with rotatable, swingable or adjustable signs or signals

Definitions

  • the present invention relates to so-called "wind" structures, the object of which is to control the transport and deposition of a pulverulent material (sand, snow, etc.).
  • this transport is the source of avalanches in the high mountains and the formation of snowdrifts on the communication routes of medium mountain regions.
  • a wind structure which, according to the invention, is automatically placed under the very action of the wind perpendicular to its direction, has the advantage of being able to be installed without prior measures.
  • the principle of the invention is to offset the active part, or an auxiliary part, of the wind structure from its axis of rotation, which creates a parasitic torque which tends to move the structure away from an equilibrium position unstable weather vane type to bring it to a new stable equilibrium position which is perpendicular to the wind direction. It is in this position that the efficiency of a wind structure is maximum.
  • Self-orientating wind structures are divided into three groups which are barriers, wind gates and roof gates.
  • the barriers and panels are identical. Only the wooden decking differs, forming a square with 50% voids for the barriers and a small side trapezoid with 10 to 30% voids for the panels.
  • the roof-nozzle retains the same metal framework as the two previous works, with the exception of the arm N which is telescopic and the decking which becomes rectangular, the short side being horizontal.
  • prefabrication becomes possible and they become competitive compared to fixed structures.
  • these structures are easily removable, which was not the case until now.
  • This advantage is less important with regard to the fight against avalanches in the high mountains, but it becomes essential in the case of the fight against congers along the communication routes in medium mountains.
  • Wind-rauto-orientable structures can also, used in small numbers, advantageously replace a measurement campaign for the installation of a system of fixed structures. They then serve as "drift" indicators.
  • FIGS. 4 and 5 two side and front views of the self-orienting barriers
  • FIGS. 6 and 7 two side and front views of the self-orienting girder panels
  • the support tube is capped by a rotation tube closed at its upper end to prevent the penetration of elements (water, frost or snow) in the simplified joint thus produced.
  • This rotation tube is positioned vertically to provide variable ground clearance by a screw-nut system or a ring system (teflon or similar) - pin and.
  • the rotation of tube 3 can be provided by machined bearings or bearings.
  • a metal frame also provided with articulation yokes fix on the arms by means of axes or bolts and ⁇ e arm allowing to tilt this frame with respect to the vertical.
  • These arms can be mounted at the base or at the top of the metal frame.
  • Removable pins and a fixed buckle allow transport and installation by helicopter in the high mountains or by crane along the communication routes, of the whole assembly.
  • the roof-nozzle has a variable inclination with respect to the vertical which is obtained by means of telescopic arms. replacing the arms other works.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

Les unites constituant les ouvrages destines a controler le transport et le depot de neige ou de sable sont montees chacune rotative autour d'un axe vertical, un decalage de leur partie ecran par rapport a cet axe faisant que l'unite entiere s'oriente sous la seule action du vent dans une position perpendiculaire a la direction de ce vent. Un tube support (i) ancre dans le sol, notamment amovible dans un tube de fondation (k), est coiffe d'un tube rotatif (j) portant en porte-a-faux un cadre support (B) de l'ecran a claire-voie en planches (c). La garde au sol de l'ecran est reglable par ajustement du telescopage des tubes porteurs (i, j), soit par un systeme vis-ecrou (f) abrite dans la partie superieure fermee du tube rotatif (j), soit par une bague en teflon (p) formant palier pour l'extremite inferieure du tube rotatif (j) et goupillable (q) sur le tube support (i) a des cotes differentes. L'ecran ajoure peut avoir des formes carree, avec 40-60% de vides, ou trapezoidale ou rectangle petit cote en bas, avec 10-30% de vides. La forme trapezoidale et la garde au sol variable permettent une utilisation dans de terrains en pente jusqu'a 80%. L'ecran est monte incline par rapport a la verticale; des bras telescopiques (N) intercales entre le tube rotatif (j) et le cadre porte-ecran permettent le reglage de cette inclinaison.The units constituting the works intended to control the transport and the deposit of snow or sand are each mounted to rotate around a vertical axis, an offset of their screen part with respect to this axis causing the entire unit to be oriented under the only action of the wind in a position perpendicular to the direction of this wind. A support tube (i) anchored in the ground, in particular removable in a foundation tube (k), is topped by a rotary tube (j) carrying in cantilever a support frame (B) of the screen a planked skeleton (c). The ground clearance of the screen is adjustable by adjusting the telescoping of the carrier tubes (i, j), either by a screw-nut system (f) housed in the closed upper part of the rotary tube (j), or by a ring. in teflon (p) forming a bearing for the lower end of the rotary tube (j) and pinable (q) on the support tube (i) at different dimensions. The openwork screen can have square shapes, with 40-60% voids, or trapezoidal or rectangle with short sides at the bottom, with 10-30% voids. The trapezoidal shape and the variable ground clearance allow use in sloping ground up to 80%. The screen is mounted inclined to the vertical; telescopic arms (N) interposed between the rotary tube (j) and the screen holder frame allow the adjustment of this inclination.

Description

PARE-NEIGE OUPARE-SABLE AUTO ORIENTABLES SELF-ADJUSTABLE OUPARE-SAND SNOW SCREEN
La présente invention concerne les ouvrages dits "à vent" dont l'objet est de contrôler le transport et le dépôt d'un matériau pulvérulent (sable, neige, etc...).The present invention relates to so-called "wind" structures, the object of which is to control the transport and deposition of a pulverulent material (sand, snow, etc.).
Dans le domaine de la neige, ce transport est à l'origine d'ava lanches en haute montagne et de formation des congères sur les voies de communication des régions de moyenne montagne.In the field of snow, this transport is the source of avalanches in the high mountains and the formation of snowdrifts on the communication routes of medium mountain regions.
Dans les ouvrages "à vent" connus actuellement qui sont des ouvrages fixes, le plus gros problème est celui de leur implantation par rapport à la direction des vents, l'efficacité maximale de l'ouvrage étant obtenue pour une orientation perpendiculaire à cette direction.In currently known "wind" structures which are fixed structures, the biggest problem is that of their location relative to the wind direction, the maximum efficiency of the structure being obtained for an orientation perpendicular to this direction.
La plupart du temps il est impossible, sauf campagne de mesures continues sur plusieurs années, de connaître avec précision la direction principale du vent qui occasionne congères ou corniches. De plus, il est possible que plusieurs directions de vent entraînent des phénomènes pertur bateurs dans le dépôt de la neige. Actuellement, les ouvrages à vent sont implantés de façon empirique sur le terrain, ce qui entraîne parfois des résultats nuls ou même négatifs (dépôt de là neige à l'endroit où on voulait 1 ' éviter ) .Most of the time it is impossible, except for a continuous measurement campaign over several years, to know precisely the main direction of the wind which causes snowdrifts or cornices. In addition, it is possible that several wind directions can cause disturbing phenomena in the deposition of snow. Currently, wind structures are installed empirically on the ground, which sometimes leads to zero or even negative results (deposit of snow there where we wanted to avoid it).
Un ouvrage à vent qui, selon l'invention, se place automatiquement sous l'action même du vent perpendiculairement à sa direction, présente l'avantage de pouvoir s'implanter sans mesures préalables. Le principe de l'invention est de décaler la partie active, ou une partie auxiliaire, de l'ouvrage à vent de son axe de rotation, ce qui crée un couple parasite qui tend à éloigner l'ouvrage d'une position d'équilibre instable de type girouette pour l'amener à une nouvelle position d'équilibre stable qui est perpendiculaire à la direction du vent. C'est dans cette position que l'efficacité d'un ouvrage à vent est maximum.A wind structure which, according to the invention, is automatically placed under the very action of the wind perpendicular to its direction, has the advantage of being able to be installed without prior measures. The principle of the invention is to offset the active part, or an auxiliary part, of the wind structure from its axis of rotation, which creates a parasitic torque which tends to move the structure away from an equilibrium position unstable weather vane type to bring it to a new stable equilibrium position which is perpendicular to the wind direction. It is in this position that the efficiency of a wind structure is maximum.
Les ouvrages à vent auto-orientables se divisent en trois groupes qui sont les barrières, les panneaux vire-vents et les toit-bϋses. Les barrières et les panneaux sont identiques. Seul le platelage en bois diffère, formant un carré avec 50 % de vides pour les barrières et un trapèze petit côté en bas avec 10 à 30 % de vides pour les panneaux.Self-orientating wind structures are divided into three groups which are barriers, wind gates and roof gates. The barriers and panels are identical. Only the wooden decking differs, forming a square with 50% voids for the barriers and a small side trapezoid with 10 to 30% voids for the panels.
Le toit-buse conserve la même ossature métallique que les deux ouvrages précédents, à l'exception du bras N qui est télescopique et du platelage qui devient rectangulaire, le petit côté étant horizontal. Ceci présente un grand avantage pour la standardisation des ouvrages à vent qui, jusqu'alors, étaient construits à la demande sur place, avec comme conséquence une augmentation considérable des coûts. Avec cette nouvelle génération d'ouvrages à vent, la préfabrication devient possible et ils deviennent compétitifs par rapport à des ouvrages fixes. De plus, ces ouvrages sont facilement démontables, ce qui n'était pas le cas jusqu'ici. Cet avantage est moins important pour ce qui concerne la lutte anti-avalanches en haute montagne, mais il devient primordial dans le cas de la lutte anticongères le long des voies de communication en moyenne montagne . Dans ce cas, les agriculteurs n'acceptent facilement qu'on implante des ouvrages dans leur propriété qu'à la condition que l'été tout soit enlevé pour permettre les travaux qui, le plus souvent, sont la fenaison. Un bouchon amovible permet de garder le tube de fondation fonctionnel pour la prochaine saison cffiver. Toujours dans le cas de la protection des voies de communication contre les congères, ces ouvrages permettent de réaliser une économie sur la longueur d'ouvrages à installer, celle-ci étant égale à la longueur de la route ou de la voie ferrée à protéger, alors qu'avec des ouvrages fixes, dès qu'il y a plus d'une direction de vent occasionnant des dépôts, ceux-ci doivent se recouper pour tenir compte de ces directions différentes.The roof-nozzle retains the same metal framework as the two previous works, with the exception of the arm N which is telescopic and the decking which becomes rectangular, the short side being horizontal. This presents a great advantage for the standardization of wind structures which, until then, were built on demand on site, with the consequence of a considerable increase in costs. With this new generation of wind structures, prefabrication becomes possible and they become competitive compared to fixed structures. In addition, these structures are easily removable, which was not the case until now. This advantage is less important with regard to the fight against avalanches in the high mountains, but it becomes essential in the case of the fight against congers along the communication routes in medium mountains. In this case, farmers easily accept the installation of structures on their property only on condition that in the summer everything is removed to allow the work which, most often, is haymaking. A removable cap will keep the foundation tube functional for the next cffiver season. Still in the case of the protection of communication routes against snowdrifts, these structures allow savings to be made on the length of structures to be installed, this being equal to the length of the road or railroad to be protected, whereas with fixed structures, as soon as there is more than one wind direction causing deposits, these must overlap to take account of these different directions.
Dans le cas de la figure 1 ci-après annexée, on voit que pour deux vents donnés, il faudrait 250 ml d'ouvrages fixes et seulement 180 ml d'ouvrages auto-orientables pour assurer la protection de 180 ml de voie de communication. Les ouvrages à vent-rauto-orientables peuvent aussi, utilisés en petit nombre, se substituer avantageusement à une campagne de mesures en vue de l'installation d'un système d'ouvrages fixes. Ils servent alors d'indicateurs de "drift".In the case of FIG. 1 below appended, it can be seen that for two given winds, 250 ml of fixed structures and only 180 ml of self-orientable structures would be required to protect 180 ml of communication channel. Wind-rauto-orientable structures can also, used in small numbers, advantageously replace a measurement campaign for the installation of a system of fixed structures. They then serve as "drift" indicators.
En fin d'hiver, on note la direction et l'importance des dépôts engendrés par le ou les éléments.At the end of winter, note the direction and the importance of the deposits generated by the element (s).
Dans le cas de la figure 2. ci-après annexée, on voit que le vent le plus gênant est celui qui a formé la congère n° 1. Enfin, du fait de leur garde au sol variable qui produit un effet de "venturi" entre l'ouvrage et le sol, ces appareils ne sont jamais enfouis dans la congère qu'ils provoquent. Ils ne sont donc jamais soumis au tassement de la neige qui a une action destructrice rapide sur tous les ouvrages submerg par des accumulations de neige. Leur longévité est donc accrue. Ces ouvrages peuvent aussi être utilisés pour lutter contre les vents de sable et la formation des dunes.In the case of FIG. 2 below annexed, it can be seen that the most annoying wind is that which formed the snowdrift No. 1. Finally, because of their variable ground clearance which produces a "venturi" effect between the structure and the ground, these devices are never buried in the snowdrifts they cause. They are therefore never subjected to snow compaction which has a rapid destructive action on all structures submerged by accumulations of snow. Their longevity is therefore increased. These structures can also be used to combat sand winds and the formation of dunes.
Les expériences de culture en milieu désertique sont souvent compromises par l'action abrasive du sable transporté par le vent. Les jeunes plants sont détruits alors qu 'une irrigation appropriée leur permettrait de se développer normalement. Les brise-vents végétaux subissent le même sort. Les ouvrages à vent auto-orientables permettraient aux jeunes arbres d'être protégés de l'action destructrice des grains de sable les premières années lorsqu'ils sont très vulnérables. Tout ce qui précède constitue des applications particulièrement intéressantes de cette nouvelle génération d'ouvrages à vent.Cultivation experiences in a desert environment are often compromised by the abrasive action of sand carried by the wind. Young plants are destroyed when proper irrigation would allow them to develop normally. Vegetable windbreaks suffer the same fate. Self-orientating wind structures would allow young trees to be protected from the destructive action of grains of sand during the first years when they are very vulnerable. All of the above constitute particularly interesting applications of this new generation of wind structures.
Les dessins ci-après sont :The following drawings are:
- figure 3 : un schéma de principe du fonctionnement des ouvrages,- Figure 3: a block diagram of the operation of the works,
- figures 4 et 5 : deux vues de côté et de face des barrières auto-orientables, - figures 6 et 7 : deux vues de côté et de face des panneaux vire-vents auto-orientables,FIGS. 4 and 5: two side and front views of the self-orienting barriers, FIGS. 6 and 7: two side and front views of the self-orienting girder panels,
- figure 8 : vue de côté du toit-buse auto-orientable.- Figure 8: side view of the self-rotating roof-nozzle.
Le meilleur mode de réalisation est le suivant :The best embodiment is as follows:
Tous ces ouvrages sont constitués d'un tube support en acier à haute résistance par basse température fondé soit directement dans le sol pour un ouvrage non démontable, soit dans un tube de fondation muni d'ailettes favorisant la répartition des contraintes dans le sol. On peut aussi se servir de la technique des ancrages en sol meuble par pieux explosés mise au point par la Division Nivologie du C.E.M.A.G.R.E.F. de Grenoble. Un bouchon amovible permet de garder le tube de fondation fonctionnel entre deux saisons hivernales.All these works consist of a steel support tube with high resistance by low temperature founded either directly in the ground for a non dismountable work, or in a foundation tube provided fins favoring the distribution of stresses in the soil. We can also use the technique of anchoring in loose soil by exploded piles developed by the Nivology Division of CEMAGREF in Grenoble. Removable cap keeps the foundation tube functional between two winter seasons.
Le tube support est coiffé par un tube de rotation fermé à son extrémité supérieure pour éviter la pénétration des éléments (eau, givre ou neige) dans l'articulation simplifiée ainsi réalisée. Ce tube de rotation est positionné verticalement pour assurer une garde au sol variable par un système vis-écrou ou un système bague {teflon ou similaire) -goupille et . Pour des ouvrages plus sophistiqués, la rotation du tube 3 peut être assurée par des roulements ou des paliers usinés.The support tube is capped by a rotation tube closed at its upper end to prevent the penetration of elements (water, frost or snow) in the simplified joint thus produced. This rotation tube is positioned vertically to provide variable ground clearance by a screw-nut system or a ring system (teflon or similar) - pin and. For more sophisticated structures, the rotation of tube 3 can be provided by machined bearings or bearings.
Sur ce tube sont fixés deux bras avec chape d'articulation. Un cadre métallique muni également de chapes d'articulation vient se fixer sur les bras par l'intermédiaire d'axes ou boulons et αe bras permettant d'incliner ce cadre par rapport à la verticale. Ces bras peuvent être montés à la base ou au sommet du cadre métallique. Des goupilles amovibles et uneboucle fixe permettent le transport et la mise en place par hélicoptère en haute montagne ou par grue le long des voies de communication, de tout l'ensemble.On this tube are fixed two arms with articulation yoke. A metal frame also provided with articulation yokes fix on the arms by means of axes or bolts and αe arm allowing to tilt this frame with respect to the vertical. These arms can be mounted at the base or at the top of the metal frame. Removable pins and a fixed buckle allow transport and installation by helicopter in the high mountains or by crane along the communication routes, of the whole assembly.
Sur le cadre métallique sont fixées par boulonnage les planches avec un pourcentage de vides variant de 40 à 60 % pour la barrière et 10 à 30 % pour les panneaux vire-vents et le toit-buse. Le toit-buse a une inclinaison variable par rapport à la verticale qui est obtenue par.1 'intermédiaire de bras télescopiquas remplaçant les bras des autres ouvrages. On the metal frame are fixed by bolting the boards with a percentage of voids varying from 40 to 60% for the barrier and 10 to 30% for windbreak panels and roof-nozzle. The roof-nozzle has a variable inclination with respect to the vertical which is obtained by means of telescopic arms. replacing the arms other works.

Claims

REVENDICATIONS
1. Ouvrages à vent auto-orientables caractérisés par le fait qu'ils s'orientent sous la seule action du vent dans une direction perpendiculaire à celle de ce vent grâce au décalage de la partie active ou platelage par rapport à l'axe de rotation des ouvrages. 1. Self-orientating wind structures characterized by the fact that they orient themselves under the sole action of the wind in a direction perpendicular to that of this wind thanks to the offset of the active part or platform relative to the axis of rotation books.
2. Barrière à vent auto-orientable selon la revendication 1 caractérisée par le fait que le mouvement de rotation est obtenu très simplement par deux tubes emboîtés.2. Self-orientable wind barrier according to claim 1 characterized in that the rotational movement is obtained very simply by two nested tubes.
3. Barrière è vent auto-orientable selon les revendications 1 et 2 caractérisée par le fait que la garde au sol variable est obtenue grâce à un système vis-écrou à l'abri des intempéries.3. Self-orientable wind barrier according to claims 1 and 2 characterized in that the variable ground clearance is obtained by means of a screw-nut system sheltered from the weather.
4. Barrière à vent auto-orientable selon les revendications 1 et 2 caractérisée par le fait que la garde au sol variable est obtenue par un système bague teflon ou similaire avec goupille de réglage.4. Self-orientable wind barrier according to claims 1 and 2 characterized in that the variable ground clearance is obtained by a teflon ring system or the like with an adjustment pin.
5. Panneau vire-vent auto-orientable selon la revendication 1 caractérisé par le fait que le mouvement de rotation est obtenu très simplement par deux tubes emboîtés.5. Self-orienting wind-winding panel according to claim 1 characterized in that the rotational movement is very simply obtained by two nested tubes.
6. Panneau vire-vent auto-orientable selon les revendications 1 et 5 caractérisé par le fait que la garde au sol variable est obtenue grâce à un système vis-écrou à l'abri des intempéries et un platelage bois de forme trapézoïdale petit côté en bas, cette garde au sol variable et cette forme trapézoïdale permettant son utilisation dans des terrains en pente jusqu'à 80 %.6. Self-orienting wind-winding panel according to claims 1 and 5 characterized in that the variable ground clearance is obtained by means of a screw-nut system sheltered from the weather and a wooden platform of trapezoidal shape with short side in low, this variable ground clearance and this trapezoidal shape allowing its use in sloping ground up to 80%.
7. Panneau vire-vent auto-orientable selon les revendications 1 et 5 caractérisé par le fait que la garde au sol variable est obtenue grâce à un système bague teflon ou similaire avec goupille de réglage et platelage bois de forme trapézoïdale petit côté en bas, cette garde au sol variable et cette forme trapézoïdale permettant son utilisation dans des terrains en pente jusqu'à 80 %.7. Self-orienting wind-winding panel according to claims 1 and 5 characterized in that the variable ground clearance is obtained by means of a teflon ring system or the like with adjustment pin and wooden decking of trapezoidal shape with small side at the bottom, this variable ground clearance and this trapezoidal shape allowing its use in sloping ground up to 80%.
8. Toit-buse auto-orientable selon la revendication 1 caractérisé par le fait, que le mouvement de rotation est obtenu très simplement par deux tubes emboîtés et que l'angle du platelage bois par rapport au sol est réglable au moyen d'un bras télescopique. 8. Self-rotating roof nozzle according to claim 1 characterized in that the rotational movement is very simply obtained by two nested tubes and that the angle of the wooden decking with respect to the ground is adjustable by means of an arm telescopic.
9. Toit-buse auto-orientable selon les revendications 1 et 8 caractérisé par le fait que la garde au sol variable est obtenue grâce à un système vis-écrou à l'abri des intempéries avec un système bague teflon ou similaire avec goupille de réglage.9. Self-rotating roof nozzle according to claims 1 and 8 characterized in that the variable ground clearance is obtained by a screw-nut system sheltered from the weather with a teflon ring system or the like with adjustment pin .
10. Ouvrages à vent auto-orientables selon la revendication 1 caractérisés par le fait que le mouvement de rotation est obtenu grâce à des paliers lisses usinés ou des roulements assurant la liaison entre les deux tubes emboîtés. 10. Self-orientating wind structures according to claim 1 characterized in that the rotational movement is obtained by machined plain bearings or bearings ensuring the connection between the two nested tubes.
EP81902628A 1980-09-25 1981-09-24 Self orientable snow fence or sand fence works Expired EP0060857B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81902628T ATE9016T1 (en) 1980-09-25 1981-09-24 SELF RIGHTING SNOW OR SAND BUILDINGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8020793A FR2490693A1 (en) 1980-09-25 1980-09-25 SELF-DIRECTING WIND BARRIER
FR8020793 1980-09-25

Publications (2)

Publication Number Publication Date
EP0060857A1 true EP0060857A1 (en) 1982-09-29
EP0060857B1 EP0060857B1 (en) 1984-08-15

Family

ID=9246352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902628A Expired EP0060857B1 (en) 1980-09-25 1981-09-24 Self orientable snow fence or sand fence works

Country Status (6)

Country Link
US (1) US4549724A (en)
EP (1) EP0060857B1 (en)
DE (1) DE3165568D1 (en)
FR (1) FR2490693A1 (en)
NO (1) NO821675L (en)
WO (1) WO1982001204A1 (en)

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FR2490693A1 (en) 1982-03-26
EP0060857B1 (en) 1984-08-15
FR2490693B1 (en) 1983-09-16
US4549724A (en) 1985-10-29
WO1982001204A1 (en) 1982-04-15
NO821675L (en) 1982-05-19

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