Apparatus for visual inspection of closed machinery
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United States of America Patent
Stats
-
Jul 7, 1987
Grant Date -
N/A
app pub date -
Aug 30, 1985
filing date -
Aug 30, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For use in inspecting the interior pipelines and other machinery subjected to risk of explosive gasses, an improved explosive proof apparatus is disclosed. The apparatus includes a periscope assembly having an optical system and lamp sealed therein for viewing a specified area subject to illumination by the lamp. Moreover, a separate battery pack is included. A flow of nitrogen gas is delivered to the battery pack and periscope to surround the electrical components to thereby prevent explosion.
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Cited Art Landscape
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