Patent ID: 7412931

Claim:
An article of furniture, comprising: a worksurface; a base including a pair of extendible and retractable supports interconnected with the worksurface for supporting the worksurface above a supporting surface, wherein each support includes a rotatable lead screw arrangement including an elongated lead screw member interconnected with the worksurface and a stationary mating threaded member, wherein rotation of the lead screw members relative to the stationary mating threaded members results in extension or retraction of the pair of supports to raise or lower the worksurface; and a biasing arrangement configured to apply an axial upward biasing force to the worksurface, wherein the upward biasing force applied to the worksurface assists in rotation of the lead screw members when it is desired to rotate the lead screw members in a direction providing upward movement of the worksurface, wherein the biasing arrangement comprises one or more biasing members remote from the supports, and one or more force transmission members that transmit the biasing force from the one or more biasing members to the worksurface, wherein the one or more biasing members comprises a cylinder assembly interconnected with the base and having a biased extendible and retractable member interconnected with the worksurface for applying an upward biasing force on the worksurface.