Measuring and testing – With fluid pressure – Leakage
Patent
1984-09-06
1986-03-25
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
7386433, G01M 320
Patent
active
045774900
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.
REFERENCES:
patent: 3067619 (1962-12-01), Fielding
patent: 3362141 (1968-01-01), Royster, Jr. et al.
patent: 4477986 (1984-10-01), Marshall et al.
patent: 4478096 (1984-10-01), Heiland et al.
Rogal, V. F. et al., Jet Probe of a Halide Leak Detector. In Instrum. & Exp. Tech., vol. 19(6), pp. 1734-1736, Publ. Jun. 1977.
Bray David J.
Johnson Peter E.
Marshall Peter E. G.
Murdoch Iain H.
Piper Francis R.
BL Technology Limited
Greer, Jr. Thomas J.
Levy Stewart J.
Roskos Joseph W.
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