Measuring and testing – Sampler – sample handling – etc. – Flow divider – deflector – or interceptor
Reexamination Certificate
2006-09-18
2009-10-06
Rogers, David A. (Department: 2856)
Measuring and testing
Sampler, sample handling, etc.
Flow divider, deflector, or interceptor
C073S863220, C073S863230, C073S863410
Reexamination Certificate
active
07597013
ABSTRACT:
A device and a method provide a detection of a presence of a test gas. The device comprises a vacuum chamber connected to a vacuum pump equipped with an electronic power supply unit. At least one portion of the chamber is separated from a surrounding outside environment by a membrane selectively permeable to the test gas. A gas flow from the outside environment is guided forcefully over the surface of the membrane via a flow conveyor, which comprises an inlet duct, a diffuser and an outlet duct. The presence of any test gas is detected by the changes in the electrical current to the vacuum pump provided by the power supply.
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Carboneri Roberto
Vittozzi Sandro
Fishman Bella
Rogers David A.
Varian S.p.A.
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