US Patent 9074721 Support system

A support arm system for a load such as a display device. The system includes a support arm (4) rotatable at its proximal end about a mid-joint axis X″, monitor supporting head (5) at the distal end of the support arm (4) has an internal slider element and compression spring, and an arrangement of links and pivots which create a torque to oppose the torque created by a load on the head (5) and keep a monitor plate (6) in the same viewing plane relative to the vertical as the arm (4) moves through its range of movement.