Abstract: An inflatable/deflatable cushion system adapted for installation onto a motorcycle seat may be operated either manually or electrically operated. In the latter case, an electrically operated air compressor is supported on the motorcycle and connected in a pneumatic path to an air port on the cushion. An electrical switch in electrical communication with a source of electrical power on the vehicle includes a first position activating the air compressor, causing the cushion to inflate, and a second position causing the cushion to deflate. In the preferred embodiment the cushion is generally U-shaped and attached to the motorcycle seat such that the rounded section of the U is most rearward on the seat with the ends of the U pointing forwardly.

Abstract: An emergency exit structure for a personnel housing chamber including an exit opening sized and positioned relative the floor of the chamber to permit personnel to exit from the chamber in a crawling position on the floor of the chamber in the event of an emergency, a door assembly, including a releasably locked door panel covering the exit opening when not in emergency use.