Telescopic ventline
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Oct 10, 2002
filing date -
Oct 11, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for ventilating tunnels and other confined spaces. The apparatus includes a telescopic ventline assembly. The telescopic ventline assembly includes a plurality of tubes wherein each inner tube or first intermediate tube is slidably disposed within an second intermediate tube or an outer tube, in a telescoping type arrangement. One method involves constructing a ventilation system that includes a plurality of ventline assemblies. Another method involves using the telescopic ventline to ventilate a tunnel or other confined space, e.g., a mine.
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