Patent ID: 8468655

Claim:
A hinge assembly for pivotally connecting a first frame section to a second frame section comprising: means forming a working pivot axis about which the second frame section is allowed to pivot when in a working position relative to the first frame section; means forming a folding pivot axis about which the second frame section pivots when the second frame section is being folded and unfolded between the working position and a transport position; a pivot plate coupled to the first frame section by a first pin forming the working pivot axis and wherein the second frame section is coupled to the pivot plate by a second pin forming the folding pivot axis; first and second links coupled to one another by a third pin, the first link also coupled to the first frame section by a fourth pin and the second link coupled to the second frame section by a fifth pin; an actuator having an extendable and retractable member, the actuator coupled between the first frame section and the first and second links by the third pin for rotating the pivot plate about the first pin to move the second frame section between the working position and the transport position; and a control link coupled to the second frame section by a sixth pin and coupled to the second link by a seventh pin, the seventh pin moving within a slot in the second link as the second frame section rotates about the working pivot axis.