Patent 7900573 was granted and assigned to Survitec Group on March, 2011 by the United States Patent and Trademark Office.
A submarine escape suit includes an ascent stole (22) for assisting a wearer to ascent to the surface from a submarine. The suit also includes a life preserver stole (26) that can be inflated on reaching the surface, to provide the suit with additional surface buoyancy. The life preserver stole (26) can also be inflated underwater to provide the suit with additional ascent buoyancy, if required.