Patent ID: 6652030
Filing Date: 2003-11-25
Classification: A47C,Y10T

Abstract:
In a chair seat that is rotatable between a seated position and an upright position, a spring assembly comprising:a static cam attached to said chair seat, said static cam maintaining the same position with respect to said chair seat when said chair seat is rotated from the upright position to the seated position; a dynamic cam positioned adjacent said static cam, said dynamic cam both rotating and moving linearly with respect to said chair seat when said chair seat is rotated from the upright position to the seated position; and a spring positioned adjacent said dynamic cam, said spring being increasingly compressed by said dynamic cam as said chair seat is rotated farther from the upright position toward the seated position, said spring also undergoing torsion when said chair seat is rotated from the upright position to the seated position, whereby both the compression and torsion experienced by said spring cause said spring to urge said chair seat away from the seated position.