US Patent 10052976 Multiple-position seat for driving operator

A driving seat comprises a base and a back rest forming a support structure. The back rest is articulated onto the base about an axis of inclination of the back rest to provide an adjustable back rest inclination angle. The base comprises a rear base panel of fixed inclination and a front base panel with an adjustable base inclination angle relative to the rear base panel. The back rest comprises a lower back rest panel and an upper back rest panel with an adjustable raising angle relative to the lower back rest panel. In operation, the back rest inclination angle, the base inclination angle and the raising angle are adjustable to adapt the configuration of the seat to a working configuration, a standby configuration, a rest configuration or a crash configuration.