Patent ID: 8555948

Claim:
A multipurpose window, comprising: a frame; a plurality of doors configured to be arranged in a row in the frame; a pair of link assemblies configured to be installed on both sides of each of the doors, configured to link the doors and configured to open or shut the frame by being folded or unfolded; and a linking device configured to link the link assemblies to fold or unfold the link assemblies at the same time, wherein: each of the link assemblies comprises: a plurality of first link elements configured to be installed on one side of each of the doors and include an outermost first link element, and that is hinged to the frame and one or more other first link elements that are slidably supported by the frame; a second link element configured to be hinged to a center of the outermost first link element and configured to be hinged to a near end of a first link element that is adjacent to the outermost first link element; a third link element configured to be hinged to a center of another outermost link element and configured to be hinged to a near end of a first link element that is adjacent to the another outermost first link element; and a fourth link element configured to be hinged to a center of a central first link element and to near ends of a pair of first link elements adjacent to the central first link element; and the linking device comprises: at least one pair of linking axes configured to face hinges on the link assemblies that rotate forward and backward in response to the link assemblies being folded or unfolded; and at least one connecting bar configured to be coupled to the at least one pair of linking axes and configured to be replaceable according to a distance between the at least one pair of linking axes.