See how a lever-coupled seat upper portion automatically displaces with backrest rotation to ma
See how a hinged front-rear seat assembly forms a cradle space during reclining, redistributing
See how a lever ring with splined hub engagement replaces knob-and-rod assemblies to reduce arm
See how pivoting seat backs convert between sittable and un-sittable configurations to adjust l
See how a spine-and-guide-ramp mechanism converts seat-bottom translation into smooth seat-back