Drift Shield

Abstract

The present invention relates to a drift shield which is adapted to be fastened to essentially vertical posts (6) arranged in the ground. The wind shield comprises a plastic sheeting (2) and at least two longitudinal stiffening strips (4) which are essentially parallel in relation to the ground and which are joined to the plastic sheeting (2) along the whole length of the plastic sheeting (2). Several dynamic wind dampers (12) in the form of V-shaped cuts are arranged in the plastic sheeting (2) in such a manner that they allow wind to pass through. The V-shaped cuts of the dynamic wind dampers (12) are arranged in columns, the dynamic wind dampers in the same column being located vertically straight under each other and the dynamic wind dampers in two adjacent columns being vertically offset in relation to each other.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a drift shield for protecting road sections or other objects against drifting snow, sand or other airborne material.PRIOR ART[0002]Many different types of drift shields are described in the patent literature. A drift shield of classic type is disclosed in the American patent U.S. Pat. No. 3,966,172, which describes a fence with sections consisting of transverse ribs or posts which can be fastened to each other and leaned against each other so that the fence will get a triangular shape when seen from the side. The main purpose of this fence is to create a portable fence which can be erected and demounted in a simple manner.[0003]U.S. Pat. No. 4,932,634 discloses a snow fence of classic type with broad and horizontally extending plastic elements which are fastened to vertical and uniformly spaced fence posts.[0004]A fence for protection against wind and snow consisting of a canvas provided with vent holes is described in the...

AI Technical Summary

Benefits of technology

The present invention is about a drift shield that is designed to efficiently protect airborne materials. It can be easily mounted and transported. The drift shield has a plastic sheeting with at least two longitudinal stiffening strips which are attached to the sheeting along its entire length. It also includes dynamic wind dampers in the form of V-shaped cuts that allow air to pass through. These dampers are arranged in columns, and they help reduce the amplification of wave motions. This arrangement also prevents the formation of areas with localized hard wind on the leeward side of the drift shield. Overall, this invention provides better protection against wind damage.

Problems solved by technology

A disadvantage with this solution is that the plates are heavy and opaque.

It is however a problem that areas with very strong wind may ensue on the leeward side.

This solution will not give fixed slits, since the material is flexible.

However, it takes a lot of time to mount the fence, since each square in the grid has to be mounted individually.

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