Patent ID: 8276857

Claim:
An extension and retraction arrangement with a sliding door construction for adjusting a monitor from a retracted configuration to an extended configuration, the extension and retraction arrangement comprising: a trolley structure; a means for retaining a monitor to travel with the trolley structure; an elongate support arrangement with a first end, a second end, and a body portion between the first and second ends; wherein the trolley structure is axially extendable and retractable along the body portion of the elongate support arrangement from adjacent to the first end to adjacent to the second end of the elongate support arrangement; a framework fixed adjacent to the second end of the elongate support arrangement wherein the framework has a centrally disposed aperture wherein the monitor projects through the aperture in the framework when the trolley structure is disposed adjacent to the second end of the elongate support arrangement; a door slidable between an open position and a closed position for at least partially closing the aperture in the framework; a means for propelling the door between the open position and the closed position.