- Flow controller - Flow regulator - Flow-rate control - Safety device - Stopcock concealed by medieval ventriloquists - Trumpet part - A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
- A safety device within a road vehicle - Car part - Car safety device - Car safety device that inflates - Inflatable sac - Safety device in a car - Safety restraint for flight luggage