Patent ID: 8516942

Claim:
An extensible protection system, comprising a frame deployed around a central tube having a longitudinal axis XX′ and comprising two ends, and a frame covering fabric, the frame further comprising: at least two pairs of rigid tubes, two rigid tubes in each pair, in a respective axial plane passing through the longitudinal axis XX′, being articulated by one of their ends to a respective yoke, of which yokes one is secured to one of the ends of the central tube, and the other is secured to the other end of said central tube, the other free ends of the rigid tubes being able to move in the axial plane of the pair, and one semirigid tube per pair of rigid tubes, in said axial plane of the pair, comprising at each of its ends a piston, each piston of a semirigid tube being able to slide fluidtightly in each one of the rigid tubes of the pair in order to form a pressurizing chamber in each of the rigid tubes, wherein the pressurizing chambers of the rigid tubes are configured to be pressurized to cause the pistons to move in the rigid tubes and to cause the protection system to change from a folded position to a deployed position.