Patent ID: 7766437

Claim:
A refrigerator, comprising: a chamber having two opposite lateral walls, each of the lateral walls being a substantially flat plane extending from a top of the chamber to a bottom of the chamber, each of the lateral walls having one of at least one groove extending from the substantially flat plane inwardly away from the opposite lateral wall and at least one protrusion extending from the substantially flat plane outwardly toward the opposite lateral wall; and a rack assembly installed inside the chamber, the rack assembly having one of at least one rack protrusion corresponding to the at least one groove and at least one rack groove corresponding to the at least one protrusion, the at least one protrusion being located in the at least one rack groove or the at least one rack protrusion being located in the at least one groove such that the rack assembly is movable along a direction of the one of the at least one groove and the at least one protrusion, wherein the rack assembly consists of: a pair of rails vertically installed at a certain interval, the one of at least one rack groove and at least one rack protrusion being located on each of the rails; side covers facing a corresponding one of the two opposite lateral surfaces of the chamber, each of the side covers being inserted into one of the rails, wherein each of the side covers has a substantially same thickness throughout each of the entire side covers in a horizontal direction, and the thickness of each of the side covers in the horizontal direction is smaller than a width of a corresponding one of the rails in the horizontal direction; a rear cover facing a rear surface of the chamber, the rear cover being inserted into the rails; and at least one rack horizontally installed in a space formed by the side covers and the rear cover.