Patent ID: 7631605

Claim:
An article of furniture comprising: a first panel having a plurality of arcuate guide grooves in a bottom surface thereof radially disposed about an axis of rotation, each arcuate groove having an insertion section, a locking section and an arcuate guide section connecting the insertion and locking sections, the arcuate guide section having a radius of curvature centered on the axis of rotation; and a support member having a plurality of locking projections projecting from a top of the support member in positions corresponding to the plurality of guide grooves; wherein the insertion section of each of the guide grooves is configured to allow movement of a respective locking projection into and out of the guide groove orthogonally with respect to the bottom surface; wherein the arcuate guide section of the guide grooves are each configured to guide a respective locking projection between the insertion section and the locking section in response to relative rotation between the first panel and support member about the axis of rotation; wherein the locking section of the grooves are configured to receive the locking projections from the arcuate guide sections and to prevent orthogonal movement of the received locking projections out of the groove; wherein said locking section of the guide grooves includes a pair of side walls, said side walls defining an undercut region that is complementarily shaped to the corresponding locking projection received therein so that orthogonal movement of the locking projection out of the groove is prevented; and wherein said locking section further includes a base wall that is offset from said arcuate guide section to define a retaining lip on an inner side of the locking section that is configured to allow movement of the corresponding locking projection into the locking section of the groove and to abut the locking projection in the locking section to prevent movement of the locking projection toward the insertion section of the groove.