Patent ID: 7854202

Claim:
A semiconductor manufacturing facility overhead transport service vehicle system adapted to allow a single user to access and service an overhead track system of the semiconductor manufacturing facility, comprising: a carriage frame comprising at least one container for storing at least one of tools and replacement components and being sized for the single user, the carriage frame being movable to a position allowing the single user to access and service the overhead track system of the semiconductor manufacturing facility; a trolley assembly comprising: a hoisting mechanism; and a mechanism movably connecting the trolley assembly to the overhead track system and comprising wheels structured and arranged to move inside the overhead track system of the semiconductor manufacturing facility; the hoisting mechanism comprising at least one lifting device for lifting and lowering the carriage frame; at least one moving device for causing movement of the trolley assembly along the overhead track system of the semiconductor manufacturing facility while all of the wheels of the mechanism of the trolley assembly remain within the overhead track system of the semiconductor manufacturing facility; a control controlling at least one of the at least one lifting device and the at least one moving device, the control being accessible to the user inside the carriage frame; and a system for preventing activation of the hoisting mechanism when it is determined that the user is not safely inside the carriage frame, wherein the overhead transport service vehicle system is configured to move on the overhead track system of the semiconductor manufacturing facility.