A seat includes a tray, a net mounted on the tray and a supporting device provided between the tray and the net. Thus, when a user sits on the seat, the net takes a proportion of the user's weight while the supporting device takes another proportion of the user's weight....http://www.google.es/patents/US7731295?utm_source=gb-gplus-sharePatente US7731295 - Chair having adjustable weight proportion accepting elements
Chair having adjustable weight proportion accepting elements
