A vehicle seat having a bladder with more than two inflatable chambers and an integral control flap, all of one piece, integral construction. To maximize inflatable volume of each chamber, each chamber preferably has a sidewall portion that is generally perpendicular. The control flap has passages in...http://www.google.co.uk/patents/US5975629?utm_source=gb-gplus-sharePatent US5975629 - Vehicle seat with inflatable bladder
