Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate
2005-12-13
2009-08-11
Fitzgerald, John (Department: 2856)
Measuring and testing
With fluid pressure
Leakage
Reexamination Certificate
active
07571636
ABSTRACT:
An instrument (10) for detecting and reporting the location of a leak in thin-walled hermetically sealed packaging (100) as between a seal leak and a side-wall leak. The instrument (10) includes a needle (20), a vacuum pump (40), and a means for creating at least two different steady-state differential pressure values across the packaging (100), a mass flow rate sensor (50), and at least one pressure sensor (31), a device for generating a perceptible signal (70) and a processor (60). The instrument (10) is operative for sensing the external pressure outside the packaging's (100) retention chamber, sensing the internal pressure within the retention chamber and transmitting an internal pressure signal, sensing the mass flow rate of gas pulled from the retention chamber, calculating flow rates and differential pressures thus indicating leaks.
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Fitzgerald John
Mocon, Inc.
Sherrill Law Offices, PLC
LandOfFree
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