Patent ID: 7690060

Claim:
An articulated mattress comprising: a mattress body including a cushion; an elevation mechanism; an internal support structure supporting the cushion, the internal support structure being disposed inside the mattress body and including an upper frame element, a lower frame element, and a central frame element connected to the upper frame element by a first joint and connected to the lower frame element by a second joint, the central frame element including at least two supports for pivotably fixing the elevation mechanism to the central frame element; and an external stabilization structure disposed outside the mattress body for supporting the articulated mattress, wherein the central frame element is removably connected to the external stabilization structure by at least one foot, wherein the elevation mechanism is configured such that the upper frame element and the lower frame element are independently movable, wherein the elevation mechanism includes a telescoping arm, and the upper frame element includes (i) a tubular peripheral portion having a first distal end and a second distal end, the first distal end and the second distal end of the upper frame element being connected to the central frame element to form the first joint; and (ii) a longitudinal lever, the longitudinal lever including a first side integrally connected to the tubular peripheral portion and a second side pivotably connected to the telescoping arm, the second side being closer to the external stabilization structure than the first side, wherein the upper frame element further includes (i) a first cross member connecting two sides of the tubular peripheral portion, the first cross member being disposed proximate to the first distal end and the second distal end of the tubular peripheral portion; (ii) a longitudinal element for reinforcing the upper frame element, the longitudinal element being connected to the first cross member and the tubular peripheral portion; and (iii) a connection piece, wherein the tubular peripheral portion, the first cross member, and the longitudinal element are arranged in a common plane, and wherein the longitudinal element, the longitudinal lever, and the connection piece are arranged to form a rigid triangle.