Patent ID: 7350884

Claim:
A tray having a front end and a back end, comprising: a base sized for supporting a unit of electronic equipment; a back wall extending perpendicularly from the base at the back end of the tray; and opposing side walls spatially separated by the base and extending perpendicularly therefrom, each side wall extending from the front end to the back end of the tray to abut the back wall, each side wall having a flange at the front end for attaching the tray to a mounting rail of a cabinet rack, the flange extending perpendicularly to that side wall away from the base, each side wall having a top edge and a bottom region that integrally joins the base, the top edge having at least one section that is cut away from the top edge and shaped to form at least one upper rail guide, the bottom region having at least one section that is cut away from the bottom region and shaped to form at least one lower rail guide, the at least one upper rail guide and the at least one lower rail guide of each side wall being integrally formed in and extending laterally from the same side of that side wall, the at least one lower rail guide being spatially separated from and opposite to the at least one upper rail guide, the at least one upper rail guide at the top edge of each side wall having a horizontal section extending laterally from that side wall and an upwards-facing lip extending from the horizontal section in a direction away from the at least one lower rail guide at the bottom region of that side wall, the at least one lower rail guide at the bottom region of that side wall having a horizontal section extending laterally from the side wall and a downwards-facing lip extending from the horizontal section in a direction away from the at least one upper rail guide at the top edge of that side wall, the horizontal sections of the rail guides opposing each other and having a spatial separation sized for closely receiving therebetween a first type of side rail, and the upwards-facing and downwards-facing lips having outer edges that face away from each other and that have a spatial separation sized for simultaneously entering respective grooves of a second type of side rail, the spatial separation between the outer edges of the upwards-facing and downwards-facing lips being greater than the spatial separation between the horizontal sections of the rail guides.