Scissors linkage workman's platform

摘要

A workman's platform comprising a wheeled base, scissors linkage having plural sets of lever arms and a deck vertically movable by the linkage. All ends of the linkage arms are longitudinally movable on the base and deck. An upper centering link is pivoted at one end to the mid-point of the deck and at the other end to the mid-point of an upper lever arm. A lower centering link is similarly connected to the deck and to a lower lever arm. The adjacent ends of the lever arms are off-set and pin-connected, the lever arms being in spaced,parallel relation when the linkage is retracted. A single vertically movable actuating element is connected to the pivot pin of the lower set of lever arms.