Patent ID: 8419133

Claim:
A seating structure comprising: a base component; a seat comprising a forward portion and a rear portion, wherein said seat is tiltable between at least an upright tilt position and a reclined tilt position, wherein said rear portion is automatically pivotable relative to said forward portion as said seat is tilted between said upright and said reclined tilt positions; and a back coupled to said seat and tiltable between at least an upright tilt position and a reclined tilt position, said back comprising a lower portion and an upper portion, wherein said upper portion is pivotable relative to said lower portion between a neutral position and an extended position, wherein said upper portion is pivotable relative to said lower portion independent of said tilt position of said back, wherein at least a portion of said back is adjustably coupled to and pivotable relative to said seat, wherein an angle between body facing surfaces of said seat and said at least said portion of said back is adjustable between at least a first upright position and a second upright position, and wherein said back further comprises a lower support member pivotally connected to said base component about a first horizontal pivot axis, an upper support member pivotally connected to said lower support member about a second horizontal pivot axis spaced from said first pivot axis, wherein said at least said portion of said back is coupled to said upper support member, and an adjustment mechanism coupled between said lower support member and said upper support member, wherein said adjustment mechanism is operable between at least first and second positions, wherein said upper support member is pivotable relative to said lower support member about said second horizontal axis between at least first and second support positions as said adjustment mechanism is operable between said at least said first and second positions.