US4534208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing a sealed container
Assignee: Motorola Solutions Inc
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Filing: 1983-11-09
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Granted: 1985-08-13
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Expires: 2003-11-09
Abstract
Abstract A sealed container having a test port with a membrane which is pervious to gas and impervious to liquid may be tested by connecting a pressure device such as a vacuum pump or pressure pump to the test port and creating a pressure differential between the container side of the membrane and the pump side of the membrane, allowing the pressure differential to equalize through the membrane and monitoring the equalized pressure to detect whether or not the equalized pressure changes, which utilmately allows the observer to determine whether the sealed container has any leaks. If the pressure equalization time is substantially zero, the membrane and/or membrane seal is defective. In the event a leak is determined, the inside of the radio device may be pressurized to a selected pressure, by use of a pressure pump or the like, and then immersed in a liquid such as water. The location of the leak may then be detected by observing the emanation of air bubbles from that portion of the device in which the leak exists.
Inventors
- 👤 Bruce J. Macin
- 👤 Mark S. Bresin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:55
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/06; G01M3/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A method of non-destructively testing the integrity of an entire sealed container having a test port including a fixed sealed membrane which is pervious to gas and impervious to liquid, comprising the steps of: non-destructively creating a pressure differential between the gas on the container side of said fixed membrane and the gas on the other side of said fixed membrane; monitoring the rate of pressure equalization to determine the integrity of said fixed membrane; allowing said pressure differential to equalize through said fixed membrane; monitoring said equalized pressure to detect whether or not said equalized pressure changes.
Claim 2
Independent Claim
98 words
A method of non-destructively testing the integrity of an entire sealed container having a test port including a fixed sealed membrane which is pervious to gas and impervious to liquid, comprising the steps of: non-destructively creating a pressure differential between the gas on the container side of said fixed membrane and the gas on the other side of said fixed membrane; monitoring the rate of pressure equalization to determine the integrity of said fixed membrane; allowing said pressure differential to equalize through said fixed membrane; monitoring said equalized pressure to detect whether or not said equalized pressure changes.
Claim 3
Dependent Claim
24 words
A method, according to claim 1, further comprising the step of: determining the location of a leak, in the event said equalized pressure changes.
Claim 4
Dependent Claim
54 words
A method, according to claim 2, wherein said step of determining the location of a leak further comprises the steps of: non-destructively pressurizing the inside of said sealed container and submerging said sealed container in a liquid to detect the location of a leak in said container in the event said equalized pressure changes.
Claim 5
Dependent Claim
42 words
A method, according to claim 1, wherein said step of creating a pressure differential further comprises the steps of: sealingly connecting a pressure device having pressure indicating means to said test port and operating said pressure device to create said pressure differential.
Claim 6
Dependent Claim
24 words
A method, according to claim 3, wherein said step of monitoring said equalized pressure further comprises the step of: observing said pressure indicating means.
Claim 7
Independent Claim
99 words
A system for non-destructively testing the integrity of an entire sealed container, comprising: said sealed container including a test port having a fixed sealed membrane which is pervious to gas and impervious to liquid, said test port further having a connecting means; a pressure means, connectable to said connecting means, for non-destructively creating a pressure differential between the container side of said fixed membrane and the pressure means side of said fixed membrane and for monitoring the pressure on the pressure means side of said fixed membrane to determine the integrity of said fixed membrane and said sealed container.
Claim 8
Independent Claim
99 words
A system for non-destructively testing the integrity of an entire sealed container, comprising: said sealed container including a test port having a fixed sealed membrane which is pervious to gas and impervious to liquid, said test port further having a connecting means; a pressure means, connectable to said connecting means, for non-destructively creating a pressure differential between the container side of said fixed membrane and the pressure means side of said fixed membrane and for monitoring the pressure on the pressure means side of said fixed membrane to determine the integrity of said fixed membrane and said sealed container.
Claim 9
Dependent Claim
34 words
A system, according to claim 6, further comprising: detecting means, in communication with said sealed container, for detecting the location of a leak, in the event a leak is indicated by said pressure means.
Claim 10
Dependent Claim
46 words
A system, according to claim 6, wherein said pressure means comprises: a vacuum pump having an adapter means connectable to said connecting meeans; and a vacuum gauge, operably connected to said vacuum pump, for indicating the pressure on the vacuum pump side of said fixed membrane.
Claim 11
Dependent Claim
46 words
A system, according to claim 6, wherein said pressure means comprises: a pressure pump having an adapter means connectable to said connecting means; and a pressure gauge, operably connected to said pressure pump, for indicating the pressure on the pressure pump side of said fixed membrane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |