Measuring and testing – With fluid pressure – Leakage
Patent
1989-05-09
1992-06-30
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73592, 73632, G01N 2904
Patent
active
RE0339776
ABSTRACT:
Leaks or thin spots in containers, as well as mechanical faults, e.g. worn bearings, are detected by an ultrasonic energy indicator that includes a modulator that heterodynes ultrasonic signals received by a transducer and creates an audio signal related thereto. The transducer includes a series arrangement of piezoelectric crystals feeding a field-effect transistor amplifier and the modulator operates in an amplitude modulation, suppressed-carrier mode which can be stabilized by a feedback loop. For indicating the presence of the audio signal, either headphones or a meter or both are employed. When leaks in a container are being detected, an ultrasonic generator is used which varies its output frequency slowly over a band of frequencies. The leak detection technique can be improved by applying a thin layer of a liquid to the container surface so that pressure introduced into the container causes the formation and bursting of bubbles in the liquid that results in the production of ultrasonic energy.
REFERENCES:
patent: 2665257 (1954-01-01), Potter
patent: 3222635 (1965-12-01), Simpkins et al.
patent: 3264864 (1966-08-01), Reid et al.
patent: 3308424 (1967-08-01), Simpkins
patent: 3374663 (1968-03-01), Morris
patent: 3508433 (1970-04-01), Bustin
patent: 3592967 (1971-07-01), Harris
patent: 3782180 (1974-01-01), Harris
patent: 3978915 (1976-09-01), Harris
patent: 4279019 (1981-07-01), Heyser
patent: 4391142 (1983-07-01), Cantrell, Jr. et al.
patent: 4719801 (1988-01-01), Blaser et al.
Borruso Marty
Goodman Mark
Zeno John R.
U.E. Systems Inc.
Williams Hezron E.
LandOfFree
Ultrasonic leak detecting method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic leak detecting method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic leak detecting method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1854475