Fences – Driftage control
Patent
1982-05-24
1985-10-29
Kundrat, Andrew V.
Fences
Driftage control
104279, E01F 702
Patent
active
045497249
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to equipment called "for wind" whose object is to control the transport and deposit of pulverulent material, e.g., sand and snow.
In the field of snow, this transport is the cause of avalanches in upper mountain and the formation of drifts on the communication passages in middle mountain regions.
The conventional "wind" works are fixedly and immovably implanted in the conventional fence with respect to the orientation of the face of the fence to the wind. The conventional fence is maximally effective only when the apparatus is perpendicular to the direction of the wind.
Most of the time it is impossible, without resorting to continuous measures over several years, to know with precision the principal direction of the wind which causes drifts or mounds. Furthermore, it is possible that the wind may blow in several of directions causing disturbing phenomena in the deposit of the snow. Presently, the wind works or barrier fences are implanted in a empirical fashion on the terrain which may result in no barrier effect and may even result in detrimental effects such as the deposit of snow at a location where one wished to avoid it.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the invention to overcome the foregoing disadvantages and to provide a barrier fence which is automatically positioned perpendicularly to the direction of the wind. It is a further object to provide a barrier fence which has the advantage of being implanted without regard to preliminary measures.
In accordance with the present invention, there is provided a barrier fence made of a support which rotatably rests within a foundation tube. Located on the support tube is a frame which comprises horizontally positioned wood planking separated in a lattice-like arrangement.
The principle of the invention is to offset the active portion, or auxiliary portion, of the barrier fence from its axis of rotation, thereby causing a parasitic coupling which tends to space the apparatus from an unstable equilibrium position of the wind vane type to bring it to a new stable equilibrium position which is perpendicular to the direction of the wind. It is in this position that the efficiency of a wind apparatus is maximized.
The self-orientatable wind works are divided into three groups e.g., wind barriers, wind directing panels and roof nozzles. The barriers and the panels are nearly identical. Only the wood planking differs, forming a square with 50% of the openings for the barriers and a small trapezoid side at the bottom with 10-30% of the openings for the panels.
The roof nozzle has the same metallic skeleton as the two previous apparatus, with the exception of a telescopic arm and of the planking which becomes rectangular, the small side being horizontal. The close similarity between the three barrier fences has a great advantage for the standardization of the barrier fences which, until now, were made to order on location, resulting in considerable increase of costs. With this new generation of barrier fences prefabrication becomes possible and competitive with respect to fixed apparatus. Furthermore, these barrier fences are easily disassemblable which was not the case until now. This advantage is less important for anti-avalanche purposes in the high mountains, but it becomes essential in the case of the anti-drift fight along the length of communication passages in the middle mountains. In this case, the farmers do not readily approve of implanting such apparatus on their property except on the condition that in the summer everything be removed to allow for example, for the the harvesting of hay. A removable stopper makes it possible to preserve the functional foundation tube for the next winter season.
In the case of protection of communication passages against drifts, the apparatus make it possible to achieve an economy over the length of the apparatus to be installed, this being equal to the length of the road, or of the train tracks to be protected, while the fixed apparatus
REFERENCES:
patent: 1108943 (1914-09-01), Swezey
patent: 1468553 (1923-09-01), Bese
patent: 1721894 (1929-07-01), Abbe
patent: 1857762 (1932-05-01), Meadows
patent: 2193062 (1940-03-01), Del Rea De Land
patent: 2646257 (1953-07-01), Krume
patent: 3473786 (1969-10-01), Luebke
patent: 3481566 (1969-12-01), Littlejohn
patent: 3630489 (1971-12-01), Cordell, Sr.
Article-"How to use Fences to Prevent Roads Being Blocked by Snow" by W. I. J. Price, B. Sc.-published Jan. 1954-pp. 7-10.
"Plastic Anti-Dazzle Screens for Safety on Divided Highways", found in Technological Digest pp. 15-16; published Apr. 1964, digested from Zampini Salazar G. F.
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