Patent ID: 7469964

Claim:
A seating system for passenger service vehicles, for aircraft in particular, comprising: a plurality of seats mounted side by side forming a row of seats, wherein each seat is limited laterally by arm rests, which determine a seat width; an adjustment mechanism for operating at least one of the arm rests in conjunction with; an adjacent arm rest for adjustment in the transverse direction of the seats between a first position and a second position, wherein the first position and the second position correspond to different seat widths; a bearing structure for supporting the row of seats on a vehicle floor; a first group of pivot axes, which are positioned on the bearing structure; a second group of pivot axes connected to the arm rest; the adjustment mechanism having lever gearing with two articulated levers forming a parallelogram guide, each lever being mounted, at one end, on the first group of pivot axes, and an opposite end, on the second group of pivot axes, wherein the pivot axes of the first and second group are parallel with each other and separated by equal distances from each other to form the parallelogram guide, the pivot axes of the parallelogram guide extend in a longitudinal direction of the scat and approximately horizontally in relation to the vehicle floor, the pivot axes of the parallelogram guide at both ends of the articulated levers are positioned in a common horizontal plane and are spaced at a distance from each other such tat the articulated levers define the respective end positions of adjustment of the arm rests, and the parallelogram guide forms a self-locking mechanism when the first and the second positions of the arm rests adjacent to each other are reached.