Patent ID: 8584802

Claim:
A mobile height-adjustable platform, comprising: a chassis having ground engaging wheels; a mast pivotally connected toward an outer perimeter of the chassis, the mast having a transport position parallel to and disposed over the chassis and an operating position perpendicular to the chassis and extending upward; a conveyor that moves along the mast; a work platform connected to the conveyor by a pivotal connection, the pivotal connection moving the platform between a transport position parallel to the mast and an operating position perpendicular to the mast and extending outward from the outer perimeter of the chassis; and a height adjustable staircase having a first end connected to move with the conveyor along the mast and a second end movably mounted adjacent to the chassis, the second end moving toward the mast as the conveyor is raised and moving away from the mast as the conveyor is lowered such that the height adjustable staircase is underlying the mast when the mast is in the transport position.