| 摘要 |
An elevating unit (20) for selective attachment to a hand truck (22) is disclosed. The elevating unit comprises, when in place on the hand truck, a main body portion (50) having a front side (52) and a back side (54). An extension leg (60) has a foot portion (62) and is disposed in sliding relation within the main body portion for selectively controlled movement between a first extended position whereat the foot portion is disposed below the lower end of the frame and a second retracted position whereat the foot portion is raised from being disposed below the lower end of the frame. An elongate threaded rod (71) is operatively mounted on the main body portion for rotation in opposed first and second rotational directions by an electrically energizable reversible motor (80). |
