Over/under monorail system for longwall mining operations
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United States of America Patent
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Jun 22, 2010
Grant Date -
Mar 20, 2008
app pub date -
Dec 20, 2006
filing date -
Sep 19, 2006
priority date (Note) -
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Abstract
An over/under monorail system for longwall mining operations can have a single overhead rail mounted trolley system with a pair of over/under mounted trolleys. Upper trolleys can be carried by the overhead rail, and can typically carry hydraulic pipes. A lower rail can be carried by the upper trolleys, and lower trolleys can be carried by the lower rail. The lower trolleys can typically carry electric cables. Some trolleys can be adapted to carry both flexible hydraulic hoses and electric cables, and such trolleys can be carried by either the upper or lower rails, depending upon the design of the overall system.
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