Apparatus for extending ventilating conduits
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United States of America Patent
Stats
-
Aug 17, 1982
Grant Date -
N/A
app pub date -
Sep 2, 1980
filing date -
May 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for continuously extending ventilating conduits in tunnelling or mining environments includes a tubular ventilating pipe store to one end of which a nozzle is releasably connected and to the other end of which a nozzle is releasably connected and to the other end of which a funnel guide is releasably connected. The ventilating pipe store contains a folded-up flexible ventilating pipe adapted to be connected to the end of a ventilating conduit to be extended. A frame is provided and support means adapted to support the nozzle, the ventilating pipe store and the funnel guide on the frame. In use, the apparatus is continuously advanced and the ventilating pipe is gradually pulled out of the store and unfolded by being passed over the funnel guide. When the store is empty it is moved away laterally and replaced with a new one, and the end of the ventilating pipe within it is connected to the free end of the ventilating conduit without it being necessary to halt the advance of the apparatus. The ventilating pipe store is supported by the frame except during those periods when it is being exchanged, and the funnel guide is supported by the frame only during the periods when the ventilating pipe store is being exchanged.
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