Film chamber and method for leak detection on a non-rigid specimen
US9927321B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2013 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Sep 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3281
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for determining the rate of leakage on a non-rigid specimen, wherein the specimen is introduced to a film chamber which can be evacuated, having at least one wall region made of a flexible material and the pressure in the film chamber is reduced outside of the specimen. The pressure gradient within the film chamber outside of the specimen is measured. In order to increase the accuracy of the leak detection, an outer over-pressure is exerted on the flexible wall region during pressure measurement which exceeds the pressure in the film chamber and outside of the specimen and the pressure inside the specimen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.