Measuring and testing – With fluid pressure – Leakage
Patent
1985-03-20
1986-08-19
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
G01M 320
Patent
active
046062211
ABSTRACT:
A method of de-polluting a helium leak detector in which a pumping station and a gas analyzer (5) connected to the pumping station via an air inlet duct provided with an insertion valve (6). The pumping station comprises a sliding vane rotary vacuum pump (1) comprising a rotor (7) and a stator (8). The assembly is placed in a sump partially filled with oil (10). A suction duct (11) connects the interior of the stator to the exterior of the sump connects exhaust channel (12) connecting the interior of the stator to the interior of the sump which is in communication with the exterior via a point (14) of the sump which is situated above the oil level. The pumping station further includes a link duct (15) having a fastening (4) for connection to an apparatus to be tested at one end and having its other end connected to the suction duct via a pump isolating valve (2). An air inlet valve (3) is placed in addition on a duct having one end which is open to the exterior and whose other end is connected to the link duct (15) between the connection fastening (4) and the isolating valve (2). With the insertion valve (6) closed, the air contained in the free space in the sump above the oil level is thoroughly swept prior to performing a leak test.
REFERENCES:
patent: 3416359 (1968-12-01), Durbin et al.
patent: 3645127 (1972-02-01), Mongodin et al.
patent: 3762212 (1973-10-01), Morley et al.
patent: 3939695 (1976-02-01), Booth
patent: 4365158 (1982-12-01), Tallon
patent: 4436998 (1984-03-01), Tallon
patent: 4510792 (1985-04-01), Morel et al.
2418 The Soviet J of Nondestructive Testing, vol. 14, No. 6, (1978.06) Automation of Preparatory Operations in Mass-Spectrometric Leak Testing, pp. 517-520.
Morel Jacques
Tallon Jacques
Compagnie Industrielle des Telecommunications Cit-Alcatel
Levy Stewart J.
Roskos Joseph W.
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