Method for leak testing with a foil chamber with vented measurement volume
US11320337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2018 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Dec 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for testing a test piece for the presence of a leak using a foil chamber, wherein the foil chamber has walls having at least one flexible wall region to which a measurement volume adjoins and is arranged on that side of the flexible wall region opposite the foil chamber volume and is hermetically separated from the foil chamber volume, having the following steps: placing the test piece in the foil chamber, closing the foil chamber, evacuating the foil chamber and monitoring the measurement volume during evacuation of the foil chamber, using the result of the monitoring to reach a conclusion regarding the magnitude of a leak, characterized in that a venting valve connecting the measurement volume to the atmosphere is closed when the pressure in the measurement volume is below a predefined threshold value, and is opened as soon as the pressure exceeds the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.