Patent ID: 7055847

Claim:
A collapsible support structure comprising an upper frame and a lower frame spaced below the upper frame in substantially underlying relationship, the upper frame adapted to be collapsed onto the lower frame from a predetermined height above the lower frame, first and second pairs of leg members, each having inner and outer telescoping barrels with opposed ends that can be extended or contracted, said pairs of leg members spaced laterally apart and the opposed ends of each barrel being pivotally connected between the upper and lower frames in diagonally crossing relationship, and a connection member extending transversely between said pairs of leg members including means for pivotally joining each leg member intermediate its ends in said crossing relationship including means for sliding along the outer barrels during pivoting of the leg members, said sliding means extending a substantial longitudinal distance to provide support for the telescoping action of the barrels, and means for locking the sliding means and outer barrels, and the inner barrels to the outer barrels at the predetermined height of the upper frame, including means for releasing the locking means simultaneously from each pair of leg member rendering the sliding means, and inner and outer barrels unlocked relative to each other in unison so that each pair of laterally spaced leg members collapses in a congruent coordinated manner.