Mine ventilation door with wings and slidable or pocket personnel door
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Jan 21, 2020
Grant Date -
Feb 9, 2017
app pub date -
Oct 24, 2016
filing date -
Oct 24, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A personnel access door assembly of an opposing wing of a mine ventilation door. The personnel access door includes a frame including a top portion, a bottom portion, a first post portion and a second post portion, the top frame portion and the bottom frame portion coupled to respective top and bottom ends of the first post and second post portions. The personnel access door further includes sets of trolley wheels affixed to the top or bottom of the frame to engage a top rail or bottom rail affixed on the opposing wing.
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