US Patent 10391896 Bus seat

A bus seat is provided. The bus seat includes a backrest frame having a curve in part and a lumbar support coupled to the backrest frame by the curve. The bus seat also includes a horizontal seat that is pivotable from a seat position, where a seat frame is locked onto a base frame, to a stowed position. The bus seat is provided in a modular configuration to allow multiple backrests to be used for the bus seat. The backrests may include changeable seat belt configurations and child restraint system configurations. The bus seat also includes a seat belt retractor having a vertical configuration and a horizontal configuration for retracting and extending the seat belt.