Measuring and testing – With fluid pressure – Leakage
Patent
1990-03-20
1991-06-11
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
G01M 322
Patent
active
050222651
ABSTRACT:
A freeze-drying apparatus has a freeze-drying chamber, a double-walled product shelf disposed within the freeze-drying chamber, a conduit system partially disposed within the freeze-drying chamber and attached to the product shelf for temperature regulation thereof, a heat-exchange fluid contained in the conduit system, a test gas reservoir connected to the conduit system outside of the freeze-drying chamber, and a test gas specific detector connected to the chamber for detecting test gas introduced into the freeze-drying chamber from the heat-exchange fluid through a leak in the conduit system. In the alternative, the test gas reservoir is connected to the freeze-drying chamber, and a test gas specific detector is connected to the conduit system outside the freeze-drying chamber for detecting test gas introduced into the heat exchange fluid from the freeze-drying chamber through a leak in the conduit system.
REFERENCES:
patent: 2504530 (1950-04-01), Jacobs
patent: 3425264 (1969-02-01), Frei
patent: 3645127 (1972-02-01), Mongodin et al.
patent: 4232546 (1980-11-01), Dumont
patent: 4328700 (1982-05-01), Fries
patent: 4419882 (1983-12-01), Ishii et al.
patent: 4524607 (1985-06-01), Pelletier et al.
Finn-Aqua
Roskos Joseph W.
Williams Hezron E.
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