Patent ID: 7047600

Claim:
A hinge assembly comprising: (a) an elongate track having a length and a width; (b) a support extension fixedly connected to the track and extending beyond the length of the track, the support extension having an integral planar bearing surface and an end cap extending transverse to the bearing surface; (c) a first link pivotally connected to the support extension beyond the length of the track at a first pivot point, the first link movable between a closed position and an open position, the first link having a given length, and the bearing surface underlying at least a portion of the given length of the first link in the closed position; (d) a second link pivotally attached to the support extension beyond the length of the track at a second pivot point spaced apart from the first pivot point to locate the first pivot point intermediate the second pivot point and the end cap, the second link movable between a closed position and an open position, the bearing surface underlying at least a portion of a length of the second link in the closed position; (e) a shoe slidably engaging the track; (f) a sash bar pivotally attached to the first link; and (g) a strut pivotally attached to the sash bar, the second link and the shoe.