Post depressurization indicator

Details Post depressurization indicator Post depressurization indicator

1994-03-31

1995-04-11

Williams, Hezron E.

Measuring and testing

With fluid pressure

Dimension, shape, or size

73 493, 116266, 222 23, G01M 302, G08B 104

Patent

active

054047463

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.

REFERENCES:
patent: 3448620 (1969-06-01), Ryan
patent: 3595200 (1971-07-01), Cilent
patent: 3952691 (1976-04-01), Peltz et al.

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