Patent ID: 7784413

Claim:
A rack assembly for housing cages, the rack comprising: at least one shelf, the shelf having a shelf section comprising a first fixed runner and a second fixed runner and at least one pivotable runner being pivotally mounted between the first and second fixed runners; the pivotable runner being pivotable between a first position and a second position; wherein the pivotable runner in a first position divides the shelf section into a first shelf width between the first fixed runner and the pivotable runner and a second shelf width between the second fixed runner and the pivotable runner, the first fixed runner having a first support flange extending toward the pivotable runner; the second fixed runner having a second support flange extending toward the pivotable runner; the pivotable runner having a first flange extending toward the first fixed runner and a second flange extending toward the second fixed runner when the pivotable runner is in the first position, the first flange extending toward the second fixed runner and the second flange extending toward the first fixed runner when the pivotable runner is in the second position; wherein the first flange of the pivotable runner and the first support flange of the first fixed runner are constructed and arranged to support a cage having a first cage width thereon when the pivotable runner is in the first position; wherein the second flange of the pivotable runner and the second support flange of the second fixed runner are constructed and arranged to support a cage having a second cage width thereon when the pivotable runner is in the first position; wherein the first support flange of the first fixed runner and the second support flange of the second fixed runner are constructed and arranged to support a cage having a third cage width thereon when the pivotable runner is in the second position, the third cage width being greater than the first cage width and the second cage width.