Patent ID: 7036798

Claim:
A mobile barrier device for control of wind and windborne contaminants, the mobile barrier device comprising a freestanding base, two uprights extending generally upward from the base, a planar panel supported by the uprights, and adjustable lifting means, wherein the planar panel comprises a generally planar body having a panel front face, a panel rear face, and a thickness which is small relative to its width and length, the planar panel supported by a rigid frame, the rigid frame comprising peripheral support members which form a frame about the periphery of the planar panel, the rigid frame comprising cross support members which extend between peripheral support members to reinforce the planar panel, wherein each of the two uprights comprises an elongate tube of square cross section, the elongate tube having an upper end and a lower end, the lower end being opposed to the upper end and separated from it by the body of the elongate tube, the lower end being rigidly secured to the base such that the elongate tube is oriented at an angle which is 10 degrees from the vertical, wherein the adjustable lifting means comprises an elongate horizontally oriented lifting tube, the lifting tube comprising a first end which is adjustably secured to one of the two uprights, the lifting tube comprising a second end which is opposed to the first end and which is adjustably secured to the second of the two uprights, the lifting tube comprising means to releasably secure the mobile barrier to lifting and transporting machinery.