Scaffold drive and steering unit

Claim 1

A drive and steering attachment for scaffolding type supports having upright standards that in scaffolding usage may be mateably engaged one above another when multi stages are to be used and wherein each of said standards are further adapted to receive separate supporting wheel attachments when increased mobility is advantageous comprising a plurality of separable and separate wheel attachments for said support with a wheel attachment for each standard, wheels for each said attachment, frame components for each aTtachment, wheel axles on said frame components for the rotative support of said wheels, means for separately and selectively engaging each of said wheel attachments with the upright standards of said supports, means facilitating the rotative movement of a plurality of said frame components with respect to the vertically disposed axis of the associated support upright to provide a castor type mounting for said plurality of frame components and wheels, an anchor element on said support for non-moving relationship therewith, motive drive means interconnecting said anchor element and at least one of aid castor wheels to provide a steerable wheel whereby said steerable wheel and its associated frame component may be rotated to forwardly and laterally directed positions with respect to the axis of its associated upright and said support, a mount adjacent the frame component of one wheel attachment, a motor drive unit on said mount, drive reduction means intermediate said motor and the wheel of said attachment, means for reversing the drive rotation of said wheel to power forward and reverse movement operations of said wheel attachment, and power control apparatus interconnected to said motive drive means and said motor drive unit whereby an operator may conveniently steer and drive said support unit.