Measuring and testing – With fluid pressure – Leakage
Patent
1983-10-11
1986-02-25
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
73 493, 73 498, 138 90, G01M 308
Patent
active
045719861
ABSTRACT:
A pneumatic pipe leak tester which includes: a compressed air source; a conduit of a first circuit connectible through an on-off valve to a pipe to be examined and provided with an electromagnetic valve; a conduit of a second circuit connectible through an on-off valve to a pipe to be examined and provided with an electromagnetic valve; a main conduit connecting the conduits of the first and second circuits to the compressed air source; a conduit of a third circuit communicating the conduits of the first and second circuits with each other; a calibration conduit branched off from one of the conduits of first and second circuits and connectible to a reference pipe through an on-off valve; an electromagnetic valve inserted in the conduit of the third circuit; a pressure transducer connected parallel with the electromagnetic valve of the third circuit C; and a detector adapted to produce a leak signal when the output signal of the pressure transducer exceeds a predetermined value; and a mechanism for sealing compressed air in the conduits of the respective circuits to the test pipes or in the conduit to the reference pipe by opening or closing the electromagnetic valves.
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patent: 2507124 (1950-05-01), Stillinger
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patent: 3434337 (1969-03-01), Goeke
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patent: 3792607 (1974-02-01), Fukuda
patent: 4344320 (1982-08-01), Haupt et al.
patent: 4393674 (1983-07-01), Rasmussen
Fujii Noritsugu
Nishimura Toshimitsu
Kabushiki Kaisha Kobe Seiko Sho
Levy Stewart J.
Williams Hezron E.
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