Mobile step ladder has a drive for the rollers which is operated by a portable power tool at the ladder head to allow the user to give positioning movements while on the ladder

摘要

The mobile step ladder (100) has rollers (111) at the under side, powered by a drive (110) to move the ladder (100). A portable power tool, such as a power screwdriver (300), is connected to the drive (110) for the movement, from the tool holder (130) at the head (105) of the assembly. The roller drive (110) is a braked gearing, a friction drive or a self-locking gearing.