US Patent 10058180 Chair, in particular office chair

Chair, more especially an office chair, comprising a seat plate (34) which is arranged on an undercarriage (12) and a backrest (14) which in the manner of a so called synchronous mechanism permit a synchronous movement of seat plate (34) and backrest (14), characterized in that the seat plate (34) is mounted laterally tiltable and the backrest includes two backrest supports (22, 24) whose lower ends are mounted pivotally independently of each other on the undercarriage (12) and are coupled in movement to the seat plate (34) in such a manner that by rearward pivoting of the support (22, 24) one side of the seat plate (34) is pressed down on the same side and the opposite side thereof is raised.