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2014
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Invention
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Method of opening a mine door leaf. A method of opening a mine door leaf installed in a mine pass... |
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2003
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Invention
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Mine ventilation structure and deck panels therefor. A mine ventilation structure with a deck mad... |
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2002
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Invention
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Mine door leaf and method of manufacture thereof. A mine door leaf of hollow construction with th... |
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2001
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Invention
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Mine door power drive system. A mine door system (10) including at least two doors (20 and 22) po... |
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2000
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Invention
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Mine door power drive system. A mine door system including at least two doors positioned in a min... |
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1999
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Invention
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Mine stopping. A stopping system for use in mines. The stopping system includes a king post truss... |
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Invention
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Adjustable stairway for use with an overcast in a mine. An overcast system for a mine is disclose... |
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1997
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Invention
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Mine door system. A mine door system adapted for installation and a passageway in a mine, compris... |
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1996
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Invention
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Serial sequencers connected in parallel. A system for controlling a first device having a first i... |
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1993
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Invention
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Structure having quick-connect components. A structure including at least two generally parallel,... |
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|
Invention
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Mine ventilation structure. A mine ventilation structure for installation at the intersection of ... |
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1992
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Invention
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A door system for a mine stopping. A door system for use in a mine stopping comprises a door fram... |
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Invention
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Contractible mine stopping and contractible block member for use therein. A contractible mine sto... |
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1991
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Invention
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Door system for a mine stopping. A door system for use in a mine stopping comprises a door frame ... |
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Invention
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Power mine door system. A power mine door system including a door frame to be installed in a mine... |
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1988
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Invention
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Head seal for a mine stopping. A mine stopping comprising a plurality of panels adapted to extend... |
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1985
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Invention
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Jack for installing a mine stopping. A jack for installing in a mine a plurality of elongate exte... |
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1984
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Invention
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Mine stopping. A mine stopping comprising a plurality of elongate extensible panels extending ver... |
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1983
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Invention
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Door frame and door assembly for a mine stopping. A door frame and door assembly for installation... |
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Invention
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Mine stopping lap-over panel clamp. A clamp for use in a mine stopping formed by a plurality of e... |
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1982
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Invention
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Mine stopping with man door and door frame assembly. A mine stopping having a man door and door f... |
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Invention
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Mine stopping and method of and jack for installing same. A mine stopping comprising a plurality ... |
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1980
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Invention
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Door for a mine stopping having knife-edge hinges. A door for closing a man-door opening in a min... |
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1977
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Invention
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Door frame and door assembly for a mine stopping. A door frame and door assembly for a doorway in... |
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1976
|
Invention
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Door for a mine stopping. A door for a doorway in a mine stopping having latch means adapted to y... |
