US Patent 9486079 Chair with seat depth adjustment and back support

An office chair including a linking mechanism between a movable chair seat and a pivotable chair back. The mounting arrangement between the chair back and the chair seat includes swing arm assembly that is pivotally connected to the chair seat. When the chair seat moves forward, the swing arm assembly moves with the chair seat and causes the chair back to pivot and move relative to a stationary support arm. The stationary support arm includes a curved support face that moves within a movement slot formed on the swing arm assembly. The movement slot includes a roller that helps guide relative movement between the two components. The chair seat includes a thigh support portion that allows the user to adjust the seat depth as desired.