Abstract: An apparatus for coupling and tipping in air a container or a movable case to unload its contents is described. Said apparatus comprises an upper frame coupled to lifting means and a lower frame coupled to a container, where the two frames are connected to each other by hinges at one end, and by a piston device at the other end, the piston device being capable of separating the two frames by a given angle between a closed resting position and an open working position.