Measuring and testing – With fluid pressure – Leakage
Patent
1984-03-05
1986-01-21
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
429 90, G01M 320
Patent
active
045650934
ABSTRACT:
A method of manufacturing and testing an electrical feedthrough having a metal ferrule, and electrical lead, a glass seal for centrally locating the electrical lead axially within the ferrule, for electrically isolating the electrical lead from the ferrule and for hermetically sealing the feedthrough assembly, and an injection molded insulating material extending between the ferrule and lead and a fluorocarbon washer positioned adjacent the inner surface of the glass seal. The fluorocarbon washer retains helium and allows for the hermeticity leakage testing of the glass seal. The manufacturing and hermeticity testing of the aforementioned cell is accomplished by constructing the electrical feedthrough with the fluorocarbon washer in position; attaching the feedthrough to the hermetically sealed cells; placing the completer electrochemical cell in a pressurized atmosphere of a test gas, such as helium, for a period of time to force the test gas through the glass seal into the chamber containing the fluorocarbon washer, whereby the fluorocarbon washer absorbs helium gas; and examining the electrochemical cell for leakage of any of the helium back out through the glass seal. Gross and fine leakage testing may be accomplished by respectively observing the escape of the test gas at atmospheric pressure and drawing a vacuum on the electrical feedback and testing for the escape of the test gas with a mass spectrometer.
REFERENCES:
patent: 4128703 (1978-12-01), Mead et al.
patent: 4166158 (1979-08-01), Mead et al.
patent: 4174424 (1979-11-01), Jurva et al.
patent: 4210708 (1980-07-01), Mead et al.
patent: 4224388 (1980-09-01), Stadnick
patent: 4233372 (1980-11-01), Bro et al.
patent: 4241152 (1980-12-01), Klink
patent: 4245014 (1981-01-01), Veit, Jr. et al.
patent: 4326016 (1982-04-01), Selover, Jr. et al.
patent: 4398413 (1983-08-01), Rao
Goodin Richard L.
Jurva Edsel O.
Levy Stewart J.
Medtronic Inc.
Roskos Joseph W.
LandOfFree
Method for facilitating hermeticity leakage testing of an electr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for facilitating hermeticity leakage testing of an electr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for facilitating hermeticity leakage testing of an electr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2293486