An improved patient support structure comprises an articulatable frame, a plurality of elongated inflatable sacks, a low pressure compressed air blower and a plurality of pipes for carrying gas from the blower to the sacks. The sacks rest atop a neoprene membrane which covers a planar upper surface of...http://www.google.co.uk/patents/US4745647?utm_source=gb-gplus-sharePatent US4745647 - Patient support structure
