Patent ID: 7172081

Claim:
A folding frame construction comprising at least a first pair of frames which are pivotally interconnected by a first pivotal connection for folding about a first axis and which form a lowermost tier when in use, and a second pair of frames which are pivotally interconnected by a second pivotal connection for folding about a second axis generally parallel to the first axis and are pivotally connected to respective frames of the first pair so as to form a second tier during use, each frame being of U-shaped configuration comprising a pair of spaced side limbs with a cross member interconnecting the side limbs thereof, the pair of spaced side limbs defining a pair of outside limbs and a pair of inside limbs, the first and second pivotal connections connecting the side limbs of the first and second pairs of frames in such a way that the first and second pairs of frames are in substantially parallel in relation to each other when the frame construction is in a storage position, wherein the frames of each pair are nested, and substantially coplanar, with each other, when the frame construction is in the storage position, and the frames of each pair are pivotally interconnected so that, in the folded condition of the construction, a free ends of each U-shaped frame terminates at a location closer to the associated pivotal interconnections than the cross-member of the other frame, and the outside limbs on the first pair of frames are pivotally connected to the outside limbs on the second pair of frames and that the inside limbs on the first pair of frames are pivotally connected to the inside limbs on the second pair of frames.