Patent ID: 7578797

Claim:
A seating system for providing spinal motion and support, comprising: a substantially static structure adapted to support a back of a user; a moving apparatus including a movable seat pan adapted to support buttocks and thighs of the user, and the movable seat pan movable along a plane, perpendicular to the substantially static structure, to convey a motive force to a force applying means, the moving apparatus including a spring mechanism to preload the movable seat pan to create resistance to movement away from the static structure; the force applying means including a back engaging surface extendible from the static structure and adapted to engage the back of the user, the force applying means adapted to translate the motive force conveyed by the moving apparatus into a movement of the back engaging surface in a direction substantially parallel to movement of the movable seat pan with respect to the static structure, wherein the movement of the back engaging surface correlates to and is driven by a movement of the moveable seat pan and wherein the back engaging surface moves in a direction substantially opposite to a direction of the movement of the moveable seat pan, thereby increasing and decreasing the force applied to the back engaging surface to cycle through a range of spinal motion and support; and a locking apparatus for locking a position of the moveable seat pan.