A stretcher for conveying a patient in an immobilized condition has a body support within a perimeter frame, and elongated flaps connected to the body support to define a tapering body support zone between the flaps. The upper side of one flap and the underside of the other flap each carry several parallel...http://www.google.com.au/patents/US4970739?utm_source=gb-gplus-sharePatent US4970739 - Stretcher
