Dan Kincheloe patented this “motorcycle safety apparel” in 1989. The rider wears an inflatable suit that’s connected by an umbilical cord to a container of compressed or liquefied gas. A much shorter pull cord connects the rider to the container’s valve. When the rider leaves the bike in a crash, the pull cord opens the valve and (hopefully) the gas inflates the suit before the umbilical cord separates.
“Thus it may seen that the jacket … expands upon separation of the rider from the motorcycle to essentially encase the rider within a protective cocoon to protect the rider from abrasion, to hold the body in a substantially rigid form, to minimize back and leg injury, to provide an air bag leg cushion around the body, to cushion impacts with hard objects and to grossly augment the protection provided by any other more conventional protective device worn by the rider such as gloves, helmet and boots.”