Gas amount measurement device

Details Gas amount measurement device Gas amount measurement device

2008-10-16

2011-10-25

Fitzgerald, John (Department: 2856)

Measuring and testing

Gas content of a liquid or a solid

Of metal

Reexamination Certificate

active

08042378

ABSTRACT:
A gas amount measuring device including a vacuum container, a first pipe, an air release valve being attached to the first pipe, a second pipe, a calibration gas generator being attached to the first pipe, a third pipe, a vacuum gauge, a first valve, a leak valve, a second valve, a turbomolecular pump, a third valve, and a roughing pump being attached to the third pipe in order from a vacuum container side, a first bypass pipe connecting the third pipe between the vacuum container and the first valve to the third pipe between the leak valve and the second valve, a fourth valve being attached to the first bypass pipe, and a second bypass pipe connecting the third pipe between the leak valve and the second valve to the third pipe between the third valve and the roughing pump, a fifth valve being attached to the second bypass pipe.

REFERENCES:
patent: 2729969 (1956-01-01), Innes
patent: 3517543 (1970-06-01), Gasser
patent: 3520171 (1970-07-01), Vantini et al.
patent: 3557604 (1971-01-01), Baeklund
patent: 3820380 (1974-06-01), Miller et al.
patent: 3949590 (1976-04-01), Boillot
patent: 4239532 (1980-12-01), Allersma et al.
patent: 4305906 (1981-12-01), Mikasa et al.
patent: 4345467 (1982-08-01), Carlson
patent: 05133852 (1993-05-01), None
patent: 2003-83865 (2003-03-01), None

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