Patent ID: 8308137

Claim:
A remote controlled vehicle to assist in threading a string through a HVAC duct system, comprising: a. chassis for holding the components of said vehicle; b. a means for propelling said vehicle in controllable directions in said duct system, said propelling means attached to said chassis; c. a video camera attached to a camera arm, said camera arm rotated by a camera motor attached to said chassis; d. a snag tool for snagging said string, said snag tool engaged by a snag arm detachably coupled to said camera arm, said snag tool controlled by a snag motor attached to said chassis; e. a command box for remotely controlling said vehicle comprising: a display for viewing images produced by said camera; and including interface means for generating command signals for remotely controlling said means for propelling said vehicle, and for generating command signals for controlling an elevation of said camera arm and said snag arm by said camera motor rotating said camera arm; and f. a tether for connecting said vehicle to a command box.