Patent ID: 8721250

Claim:
A robotic device movable in first, second and third mutually perpendicular directions along rails arranged in multiple rows, the rails in a row being arranged along the first and second directions, the rows being arranged along the third direction perpendicular to the first and second directions, the robotic device comprising: a frame, wheels coupled to the frame for moving the frame along the rails in the first and second directions, support handles for lifting the frame in the third direction from first rails arranged in a first row of the rails to second rails arranged in a second row of the rails, the support handles being configured for providing engagement with the second rails so as to lift the robotic device in the third direction from the first rails to the second rails, the support handles engaged with the second rails causing the frame to be lifted above the first rails at a level sufficient to disengage the wheels from the first rails, and a wheels turning mechanism for turning the wheels with respect to the first direction when the wheels are disengaged from the first rails, the wheels turning mechanism being configured for turning the wheels so as to make a width of the robotic device in the second direction smaller than a distance between the second rails in the second direction.