Method and apparatus for testing the fluid-tight sealed integrity of a hermetically-sealed package in a rapidly-stabilized environment
US4715215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/363
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A leak detector is adapted to test the fluid-tight sealed integrity of a hermetically-sealed package having a movable wall portion. An enclosure surrounds a package-to-be-tested, and the space within the enclosure is evacuated by a vacuum pump. As the pressure acting on the outer surface of the package begins to fall,the gas within the package will be expand, pushing the movable wall portion outwardly. Such displacement of the movable wall portion is sensed and compared with a predetermined value. If desired, the reduced pressure within the enclosure may be held constant for as time interval, and the sensor used to determine whether the distended wall portion has relaxed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.