| 摘要 |
Provided is a passive protection device including a housing volume which is impermeable to air; at least one inner chamber which is permeable to air and housed in the housing volume, filling particles made of a vegetable fabric and housed in the inner chamber; at least one valve configured to make a fluid-passage connection between the inner chamber and the external environment so as to alter the extension of the inner chamber and to define an extended configuration, in which the distinct particles are freely movable inside the inner chamber, and a compressed configuration in which the distinct particles are compacted to form a solid body. |
