Safety device for pressurizing an envelope at risk of bursting
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United States of America Patent
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Aug 2, 2005
Grant Date -
Mar 6, 2003
app pub date -
Aug 30, 2002
filing date -
Sep 4, 2001
priority date (Note) -
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Abstract
A safety device for inflating an envelope at risk of bursting comprising: a tubular body, a piston element slidably and sealably mounted within at least one inner portion of the tubular body; at least one piston rod integral with the piston element and extending so as to protrude from a first end of the tubular body; an annular bottom member, located in the tubular body or at the first end of the tubular body and suitable for slidably guiding the piston rod and for closing the tubular body whereby delimiting an annular space together with the tubular body and with the piston; removable anchoring device suitable for acting at a protruding end of piston rod and for constraining the piston rod to a support; at least one inlet opening and at least one outlet opening formed in the tubular body at the annular space, in operation said inlet opening being suitable for being connected to a pressurize fluid source and the outlet opening being designed to be connected to the envelope to be pressurized; and a yielding retainer for holding in position the said piston element, so that in case of bursting, the unit formed by the tubular body and the annular bottom member can be moved longitudinally following a bursting impact with respect to the piston element in contrast with the yielding retainer.
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