Patent ID: 7513543

Claim:
A panel assembly comprising: a frame; a pivot member pivotably supported by the frame; a support arm body secured at an end to the frame; a rack arm secured to the pivot member and slidably mounted in the support arm body between a closed position in which the pivot member is pivoted closed in the frame and an open position in which the pivot member is pivoted open in the frame; and a cam lock affixed to the support arm body, the cam lock being movable between at least a release position, in which the rack arm is freely slidable in the support arm body, and a lock position, in which the cam lock is cooperable with a lock member to engage the rack arm, and the rack arm is substantially fixed in the support arm body against movement toward both the closed position and the open position, wherein the cam lock comprises structure such that in the lock position, the cam lock substantially fixes the rack arm in the support arm body by an over-center locking arrangement.