Patent · US Active

Method and device for tightness testing

US8646315B2 · kind B2 · utility

3Cited by

14References

1Claims

0Family size

Assignee

INFICON AG · LI

Inventor

Daniel Wetzig · Cologne, DE

Key dates

Filing date	Nov 27, 2008
Grant date	Feb 11, 2014
Priority date	—
Expiry date	Sep 16, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01M3/229
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A test subject, which is filled with test gas, is placed in a testing chamber, which can be evacuated. A carrier gas is conducted into the testing chamber, so that a gas mixture made of carrier gas and test gas forms therein. The gas mixture is suctioned out of the testing chamber by a compressor pump. A testing gas sensor is connected to the outlet of the compressor pump. The test gas is contained in the compressed gas mixture at a partial pressure which is increased by the compression ratio. In this manner, the sensitivity of the test gas recognition is increased and/or the time constant of the measurement is shortened.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.