Patent ID: 7367461

Claim:
A portable jib for movably mounting to a crane girder including a beam having an upper portion and a rail positioned on the upper portion, the portable jib comprising: a base frame configured for traveling along the girder; wherein the base frame comprises a pair of end trucks spaced apart and located on opposite sides of the rail; wherein each end truck includes at least one wheel for supporting the base frame on the beam upper portion on opposite sides of the rail and horizontally traveling along the girder; wherein each end truck includes at least one guide plate extending inwardly below the beam upper portion to receive the beam upper portion for mounting the base frame to the girder and guiding the base frame along the girder; a support member coupled to the base frame, wherein the support member extends substantially upward from the base frame; a boom coupled to a free end of the support member, the boom extending substantially radially outward from the support member; and wherein the base frame, the support member and the boom are assembled on the girder for use and disassembled for removal from the girder after use.