Patent ID: 7559607

Claim:
An adjustable ergonomic back for a seat comprising: a) a plurality of back cushions, each cushion corresponding to at least one adjustment area; b) a structural shell having a plurality of voids therein; c) a plurality of thin flexible elements located between the back cushions and the structural shell, each flexible element being attached to the structural shell and having a front surface and a back surface, the front surface being in contact with a respective adjustment area corresponding to one of the plurality of back cushions; and d) a plurality of actuators located between the flexible elements and the structural shell, each of said plurality of actuators being in contact with one of said respective back surfaces of the flexible elements and exerting a pressure on said one back surface, wherein the at least one adjustment area includes a lumbar support area and the structural shell is slideably mounted on a support structure through a plurality of vertical guide tracks and a height adjustment actuator is attached to the structural shell for displacement of the shell with respect to the support structure along a vertical direction and for a vertical adjustment of the lumbar support area.