Patent ID: 7552685

Claim:
A system for transporting a trolley along a first main cable of a suspension bridge having a tower, the system comprising: first and second support cables, each support cable located above the first main cable and extending along and substantially parallel to the first main cable; a trolley that includes lead and trail support assemblies engaged with the support cables, the lead support assembly having first and second enclosures suspended therefrom, each first and second enclosure located at a laterally opposite side of the first main cable, so that the first main cable is positioned between the first and second enclosures, the trail support assembly having third and fourth enclosures suspended therefrom, the third and fourth enclosures being spaced laterally with respect to the first main cable, so that the first main cable is positioned between the third and fourth enclosures, the third and fourth enclosures being spaced longitudinally from the first and second enclosure, and a first platform is secured to the first and third enclosures, and a second platform is secured is to the second and fourth enclosures; a winch; and a tugger cable engaged with the winch and connected to the support assembly for pulling the enclosures along the first main cable toward the tower to service the first main cable.