Robust mine ventilation door with single actuation system
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United States of America Patent
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Nov 10, 2015
Grant Date -
Jan 23, 2014
app pub date -
Feb 22, 2013
filing date -
Jul 20, 2012
priority date (Note) -
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Abstract
A high-pressure mine door assembly for use in mine shafts, the door assembly configured with opposing wings, which enable the door assembly to open and close quickly. The assembly includes a major hub and a minor hub positioned at or above the cap of the door assembly and coupled together via a connecting bar. A drive mechanism is coupled to the cap and the connecting bar, which facilitates the opening and closing of the wings of the door assembly. The door assembly is configured in a 12-6 pitch orientation, requiring only a ⅔ rotation of the wings to fully open the door assembly to. Such a configuration also negates the effect of air pressure on operation of the door assembly, regardless of the direction of the airflow, with the airflow assisting one wing in opening and the other in closing.
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