Patent ID: 7393025

Claim:
A combination of a mine stopping and a door system for closing a doorway in the mine stopping, said door system comprising: a door hinged adjacent the doorway for swinging relative to the stopping between a closed position and an open position swung outwardly away from the stopping; a keeper mounted in fixed position relative to the doorway; and a trigger-actuated latch mechanism including a detent engageable with the keeper for latching the door in its closed position and a trigger operably connected to the detent in a latched position, the detent in the latched position being biased toward an unlatched position, the mechanism being constructed and configured so that actuation of the trigger causes the detent to move from the latched position in which the detent engages the keeper for latching the door closed to the unlatched position in which the detent is disengaged from the keeper for allowing the door to be opened.