Patent ID: 6238000
Filing Date: 2001-05-29
Classification: A47C

Abstract:
An adjustable mechanism for a chair, which chair has a base part, and a seat mounted on the base part so as to be of adjustable inclination relative to the horizontal, said mechanism including a spring arrangement disposed in compression to provide a spring force applied in a direction between the base part and the seat so as to resist said adjustment movement of the seat, wherein the spring arrangement is mounted at opposite ends thereof between pivotally interconnected upper and lower supports, and wherein the lower support has a free end region which is engageable with a fulcrum member about which the lower support pivots during movement of the upper and lower supports towards and away from each other, and an adjustment control operable to effect adjustment of the relative angular disposition of the upper and lower supports and lateral movement of one end of the spring arrangement relative to the other by adjustment of the position of the fulcrum member.