US Patent 6868858 Roof structure for folding tent frame

A tent frame including: leg posts; a plurality of expandable connectors connected in pairs between adjacent posts, each connector having first and second outer ends and is fixedly connected at the first outer end to the upper end of one post and slidably connected at the second outer end to a lower portion of the same post, each connector movable between extended and folded states; a roof comprising upper poles, each pivotally connected to a post and to a central pole, each upper pole and corresponding central pole are movable between an extended and folded states; and support pole assemblies, each connected at one end to slide with a second outer end and at another end to a central pole so that each connector, upper pole and central pole expand together to the extended state and the support pole assemblies support the central poles to maintain the extended state.