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Abstract

A mobile scaffold unit having a wheeled base frame and a horizontal work platform, interconnected by upper end lower scissors sets. Each scissors set has a power arm and a stabilizer member, and the upper and lower pivotally connected power arms have a hydraulic ram connected therebetween. The upper and lower power arms are pivotally connected to the platform and base frame respectively and have a length greater than the length of the platform, with the ram being connected to the power arms beyond the platform. The width of the scissors set is considerably less than the distance between the wheels on opposite sides of the frame, enabling the scissors set to be disposed between the wheels and to be mounted to the base frame at a level considerably below the upper surfaces of the wheels. The power arms are made up from three beams connected in a fork manner and provide two parallel beams where the forces are greatest and a single beam where forces are relatively low.

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First Claim