Motorized scaffold attachment

A self-propelling attachment for light duty platform supporting scaffold towers of the type generally used for overhead finishing work in the installation of wiring and lighting fixtures, duct work ceilings and ceiling finishing operations and the like, which towers have supporting caster wheels detachably mounted on the feet thereof so they may be rolled from place to place, said attachment comprising at least two propulsion units and operating means interconnected therewith for independent operation of said units, each propulsion unit comprising a base including means thereon for detachably attaching said base to the foot of a tower in place of the normal caster wheel, wheel mounting means depending downwardly from said base and having a propulsion wheel freely rotatably mounted thereon, frame means swingably attached to said base for swinging movement toward and away from said propulsion wheel, a motor and a drive means affixed to said frame means, said drive means including a drive wheel frictionally engaging said propulsion wheel and limiting movement of said frame means toward said propulsion wheel.

A portable propulsion means for scaffolding towers of the type having caster wheels on the feet thereof for rolling the tower from place to place, said propulsion means comprising a motorized wheeled propulsion unit having a base, means on the base for attaching the same to the foot of a scaffold tower, a freely rotatable propulsion wheel carried by said base, a motor pivotally mounted on said base for free swinging movement toward and away from said propulsion wheel, drive means rigidly attached to said motor and interconnecting said motor and said propulsion wheel, said drive means including a driven wheel frictionally engaging said propulsion wheel to propel the unit, and control means operably connected to said propulsion unit for operation remote therefrom.