Patent ID: 8162389

Claim:
A folding chair comprising: a seat frame; a leg frame hinged to the seat frame; a first hinge mechanism on a first side of the chair between the seat frame and the leg frame; a quick-release locking mechanism comprising a slideable spring loaded post on the first side of the chair for releasably locking the seat frame with respect to the leg frame; a second hinge mechanism on a second side of the chair between the seat frame and the leg frame; a separate supplemental locking mechanism on the second side of the chair including: a previously formed internally threaded orifice in one of the seat frame and the leg frame on the second side of the chair configured to receive a threaded fastener, an opening in the second hinge mechanism aligned with the orifice when the chair is unfolded, and the threaded fastener configured to extend through the opening in the second hinge mechanism to engage the internally threaded orifice to secure the seat frame to the leg frame.