Patent · US Expired

Method for operating helium leak indicator and the application of this method to helium leak indicators

US6415650B1 · kind B1 · utility

13Cited by

14References

15Claims

0Family size

Assignee

LEYBOLD VAKUUM GmbH · DE

Inventors

Thomas Böhm · Zorneding, DE
Rudi Widt · Recklinghausen, DE

Key dates

Filing date	Jan 21, 2000
Grant date	Jul 9, 2002
Priority date	—
Expiry date	Jan 21, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01M3/202
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Method for operating, a helium leak indicator (1) consisting of a helium detector (4) with evacuation devices comprising at least a high-vacuum pump (6), a backing pump (9) and a valve (16) whose level of flow conductance can be adjusted and serves to modulate the through-flow of test gas to be analyzed; in order to influence the sensitivity in a simple manner, the method provides that the modulation properties be changeable in such a manner that the effective pumping capacity at the inlet of the leak indicator is changed by the adjustment of the modulation properties.

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