Post depressurization indicator
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United States of America Patent
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Apr 11, 1995
Grant Date -
N/A
app pub date -
Mar 31, 1994
filing date -
Mar 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A post depressurization device (30) for providing an indication of the pressure that existed within a fluid filled pressure vessel (22) just prior to depressurization of the pressure vessel, having a housing (102) and a piston (130) for temporality sealing an open end of the housing and outwardly movable in response to a pressure differential not less then a predetermined level generated subsequent to the depressurization of the pressure vessel. The piston and the housing cooperating to define a pressure storage cavity (156). The housing including a valve (122) for permitting the fluid within the pressure vessel to enter the pressure cavity and stabilize at a level substantially equal to the pressure level within the pressure vessel and for inhibiting a rapid decrease in the pressure within the pressure cavity immediately subsequent to depressurization of the pressure vessel.
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