Detecting leaks
US4577490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1984 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Sep 6, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A leak detector comprises a detector head which is to be scanned across a surface to detect a signal gas eminating from the surface. The opposite side of the surface from the head is supplied with a signal gas under pressure so that signal gas passes through leaks in the surface. Detection of signal gas by the head should then constitute detection of a leak. A curtain 1 of barrier gas is provided around a sample inlet 2 to protect the inlet from spurious signal gas. Orifices 36 provide narrow high velocity jets 38 which impinge on the surface S within curtain 1 and break up jets such as 34 of signal gas which escape under the curtain 1 without allowing the signal gas to reach the sample inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.