US Patent 7837274 Dynamic trunk support system

A device is provided for supporting a portion of the upper body during forward lean. The device comprises a hinge joint provided on a base plate. A central pillar extends upwards from the hinge joint, the hinge joint enabling movement of the central pillar through a range of motions. A support plate is situated on the central pillar at an opposite end from the hinge joint, the support plate providing support to a user in the region of the user's breast plate. At least one resistor element is operably associated with the central pillar to receive stresses delivered via at least one linkage unit during periods of forward lean, thereby transferring at least a portion of the upper body weight to the at least one resistor element.