Leak detector

Details Leak detector Leak detector

1980-03-17

1981-10-13

Goldberg, Gerald

Measuring and testing

With fluid pressure

Leakage

G01M 320

Patent

active

042941067

ABSTRACT:
A leak detector comprises helium measuring means (6) for measuring helium sucked in by a sniffer (2) via a flexible hose (3) and a liquid nitrogen trap (5). A vacuum is maintained in the nitrogen trap (5) by a molecular diffusion pump (7) leading to a vacuum pump (18) which exhausts to the atmosphere. In order to speed the flow of gas, possibly including helium as a tracer element, along the flexible hose (3) most of the gas sucked in by the sniffer (2) is diverted from the inlet (4) to the nitrogen trap by a bleeder arrangement (12) connected to an auxiliary duct (11) which is itself connected to an intermediate point between two stages in the vacuum pump (18).

REFERENCES:
patent: 2486199 (1949-10-01), Nier
patent: 3327521 (1967-06-01), Briggs
patent: 3520176 (1970-07-01), Becker
patent: 3592048 (1971-07-01), Maurice et al.
patent: 3616680 (1971-11-01), Schrader
patent: 3626760 (1971-12-01), Briggs et al.
patent: 3645127 (1972-02-01), Mongodin et al.
patent: 3690151 (1972-09-01), Briggs
patent: 3762212 (1973-10-01), Morley et al.
patent: 3867631 (1975-02-01), Briggs et al.
patent: 3968675 (1976-07-01), Briggs

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