The headrest for a rear seat is fastened to two rods which are adapted for sliding movement in guide sleeves mounted in the backrest of a motor vehicle. The rods are comprised of an upper rod portion and a lower rod portion which are interconnected by a pivot joint. Upon actuation of a push button, the...http://www.google.fr/patents/US4711494?utm_source=gb-gplus-shareBrevet US4711494 - Foldable headrest for vehicle rear seat
