Patent ID: 8096620

Claim:
A riser assembly for a modular seat frame for a school bus comprising: a riser formed of a moldable material and having a major face; a plurality of support ribs disposed on the major face and defining the major face as an interior face; a riser extension including an open trough for locating one end of a seat back frame member and providing a point of attachment for one end of the seat back frame member; and at least a first neck reinforcement member for installation on the riser at the point of attachment, said at least first neck reinforcement member including a tube section which fits snugly in the open trough to reinforce the open trough of the riser extension and a gusset depending from an end of the tube section which fits against the support ribs of the interior face; and the tube section of the first neck reinforcement member being shaped to mate with the one end of the seat back.