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An extensible protection system, comprises a frame that can be deployed around a central tube of longitudinal axis, comprising two ends, a frame covering fabric, the frame having at least two pairs of rigid tubes, two rigid tubes of one pair, in a respective axial plane passing through the longitudi

An extensible protection system, comprises a frame that can be deployed around a central tube of longitudinal axis, comprising two ends, a frame covering fabric, the frame having at least two pairs of rigid tubes, two rigid tubes of one pair, in a respective axial plane passing through the longitudinal axis, 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, 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, the protection system further comprising a device for pressurizing the chambers of the rigid tubes in order to cause the pistons to move in the rigid tubes and cause the system to change from a folded position to a deployed position.

대표청구항 ▼

1. 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 passin

1. 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, andone 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, whereinthe 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. 2. The protection system as claimed in claim 1, wherein the rigid tubes have a degree of freedom in rotation about an axis YY′ of articulation to its respective articulating yoke perpendicular to its respective axial plane passing through the axis XX′ of the central tube. 3. The protection system as claimed in claim 1, wherein the articulated ends of the rigid tubes are closed in order, with the piston of the semirigid tube, to form the pressurizing chamber in each of the rigid tubes. 4. The protection system as claimed in claim 1, wherein each of the rigid tubes comprises, at its free end, an end stop secured to the rigid tube and in the form of an O-ring seal surrounding the semirigid tube. 5. The protection system as claimed in claim 1 wherein each of the rigid tubes comprises an intermediate guide to guide part of an end of a semirigid tube as the semirigid tube moves in a rigid tube. 6. The protection system as claimed in claim 1, wherein the central tube comprises angle-of-incidence stops arranged at its periphery so that when the protection system is in the folded position, the free ends of the rigid tubes come to rest against these angle-of-incidence stops to make an angle of incidence θ with the central tube. 7. The protection system as claimed in claim 1, wherein the fabric is configured to adopt an oval shape when the protection system is in the deployed position, the fabric comprising, at each of the ends of the central tube, an opening through which the rigid tubes can pass, and wherein edges of the openings in the fabric are secured to the rigid tubes in order to hold the fabric in position on the frame. 8. The protection system as claimed in claim 1, wherein the protection system further comprises cables of predetermined lengths fixed to each of the ends of the central tube in order to give the fabric a predetermined shape. 9. The protection system as claimed in claim 1, wherein, at their articulated ends, the rigid tubes are closed by end plates, a right-hand end plate at one end of the central tube and a left-hand end plate at the other end of the central tube, the chambers of the rigid tubes being pressurized by pressurizing the end plates. 10. The protection system as claimed in claim 1, wherein each of the rigid tubes is closed independently at its articulated end, the chambers of each of the rigid tubes being pressurized independently.