Film Chamber and Method for Leak Detection on a Non-Rigid Specimen
US-2015241298-A1 · Aug 27, 2015 · US
Tightness test during the evacuation of a film chamber
US9784639B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9784639-B2 |
| Application number | US-201414914692-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 18, 2014 |
| Priority date | Aug 29, 2013 |
| Publication date | Oct 10, 2017 |
| Grant date | Oct 10, 2017 |
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Abstract
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A method for testing the sealing tightness of a specimen, containing a gas, in a film chamber made from flexible material. The film chamber is evacuated by a vacuum pump and the gas flow flowing out of the film chamber and generated by the vacuum pump is measured during the evacuation and is examined with respect to a possible leak of the specimen.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for testing sealing tightness of a specimen, containing a gas, in a film chamber made from flexible material, the film chamber being evacuated by a vacuum pump, wherein a gas flow flowing out of the film chamber and generated by the vacuum pump is measured during the evacuation and is examined with respect to a possible leak of the specimen. 2. The method of claim 1 , wherein prior to measurement, a ratio of the gas quantity in the film chamber outside the specimen and the gas quantity inside the specimen is reduced. 3. The method of claim 1 , wherein the gas flow measured is compared with a course of a reference gas flow. 4. The method of claim 3 , wherein the reference gas flow is a gas flow for a tight specimen. 5. The method of claim 3 , wherein the course of the reference gas flow is measured and stored in advance. 6. The method of claim 3 , wherein a leakage rate is determined by subtracting the reference gas flow from the measured gas flow. 7. The method of claim 1 , wherein the measurement is made using a flow sensor. 8. The method of claim 7 , wherein the flow sensor is situated in an exhaust gas flow of the vacuum pump. 9. The method of claim 1 , wherein the measurement is performed at a throttle point of a gas-carrying system. 10. The method of claim 9 , wherein the gas-carrying system is a pipe system connecting the film chamber and the vacuum pump. 11. The method of claim 1 , wherein the gas flow from one pump-off line to another is measured during the evacuation phase and is used to determine a leakage rate from the specimen. 12. The method of claim 1 , wherein a pressure difference between two pump-off lines during the evacuation phase is used to determine a leakage rate from the specimen.
Assignees
Inventors
Classifications
- G01M3/3218Primary
for flexible or elastic containers · CPC title
- G01M3/3281Primary
removably mounted in a test cell · CPC title
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- What does patent US9784639B2 cover?
- A method for testing the sealing tightness of a specimen, containing a gas, in a film chamber made from flexible material. The film chamber is evacuated by a vacuum pump and the gas flow flowing out of the film chamber and generated by the vacuum pump is measured during the evacuation and is examined with respect to a possible leak of the specimen.
- Who is the assignee on this patent?
- Inficon Gmbh
- What technology area does this patent fall under?
- Primary CPC classification G01M3/3218. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Oct 10 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).