| 摘要 |
<p>A safety device for inflating an envelope (32) at risk of bursting comprising: a tubular body (2), a piston element (3) slidably and sealably mounted within at least one inner portion of the said tubular body (2); at least one piston rod (6) integral with said piston (3) element and extending so as to protrude from one first end (5) of the said tubular body (2); an annular bottom member (11), located in the said tubular body (2) or at the said first end (5) thereof and suitable for slidably guiding the said piston rod (6) and for closing the said tubular body (2) whereby delimiting an annular space (19) together with the said tubular body and with the said piston (3); removable anchoring means (14; 39; 44) suitable for acting at the protruding end of said piston rod (6) and for constraining the said piston rod (6) to a support (18); at least one inlet opening (21) and at least one outlet opening (23) formed in the said tubular body (2) at the said annular space (19), in operation the said inlet opening (21) being suitable for being connected to a pressurised fluid source and the said outlet opening (23) being designed to be connected to the said envelope to be pressurised (32); and yielding retention (19,27) means for holding in position the said piston (3) element, so that in case of bursting, the unit formed by said tubular body (2) and said annular bottom member (11) can be moved longitudinally following a bursting impact with respect to the said piston element (3) in contrast with the said yielding retention means (19, 27). <IMAGE></p> |
