摘要:
An arrangement for the distribution of pressurised fluid to areas of a seat unit having a backrest comprising a first fluid-containing chamber (3) adaptable to the seat area (4) of the seat unit (2) so as to be adapted to receive, at least in part, the user's weight; one or more inflatable chambers (6,7) adaptable to the seat unit backrest; and lines (8, 9) communicating between the first chamber (3) and each said backrest (5) chamber (6, 7). Each line (8, 9) has inserted therein a normally closed valve means (50) provided with an opening means with opening controls (81,95) positioned in the seat unit such as to be accessible to the user. The invention also relates to an embodiment of said valve.