US Patent 7461825 Tray support arm assembly

A tray support arm assembly provides for the positioning of a tray and an attached movable arm in a substantially horizontal orientation with respect to the console portion of a machine for use and a substantially vertical orientation with respect to the console portion of a machine for storage. The tray support arm assembly includes a lockable tray rotation joint, a lockable wrist joint, a lower arm assembly, a lockable elbow joint, an upper assembly and a lockable shoulder joint.