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US 4,523,406 AGranted
Door frame and door assembly for a mine stopping
OwnerJohn M. Kennedy, William R. Kennedyinventors
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OwnerJohn M. Kennedy, William R. Kennedyinventors
Estimating the term…
A door frame and door assembly for installation in a man-door opening in a mine stopping in which the door is hinged for swinging movement on an axis extending transversely across the frame adjacent one face of the frame and adjacent the top of the frame. The hinge also mounts the door for up and down movement of the door relative to the frame. The door is of such height as to occupy a closed position in the frame inclined down from the hinge toward the other face of the frame with its lower edge bearing on the bottom of the frame and with the door at its top being engageable with and extending up past the top of the frame at the one face of the frame. The door is adapted to swing up from its closed position for opening it, and to move relative to the frame at the hinge to avoid jamming and buckling of the door while maintaining closure of the door upon distortion of the frame such as may result from pressure on the frame in a mine stopping.
A door frame and door assembly for installation in a man-door opening in a mine stopping, said assembly comprising a rectangular frame having a top, bottom and sides, a door, and hinge means for the door, the hinge means mounting the door for swinging movement on an axis extending transversely across the frame adjacent one face of the frame and adjacent the top of the frame, the hinge means also mounting the door for up and down movement of the door relative to the frame, the door being of such height as to occupy a closed position in the frame inclined down from the hinge means toward the other face of the frame with its lower edge bearing on the bottom of the frame and with the door at its top being engagable with and extending up past the top of the frame at said one face of the frame, the door being adapted to swing up from its said closed position for opening it, and being adapted to shift up relative to the frame upon distortion of the frame such as may result from pressure on the frame in a mine stopping in a mine.
A door frame and door assembly for installation in a man-door opening in a mine stopping, said assembly comprising a rectangular frame having a top, bottom and sides, a door, and hinge means for the door, the hinge means mounting the door for swinging movement on an axis extending transversely across the frame adjacent one face of the frame and adjacent the top of the frame, the hinge means also mounting the door for up and down movement of the door relative to the frame, the door being of such height as to occupy a closed position in the frame inclined down from the hinge means toward the other face of the frame with its lower edge bearing on the bottom of the frame and with the door at its top being engagable with and extending up past the top of the frame at said one face of the frame, the door being adapted to swing up from its said closed position for opening it, and being adapted to shift up relative to the frame upon distortion of the frame such as may result from pressure on the frame in a mine stopping in a mine, said door comprising a main door panel, said panels, and means mounting said side panels on one face of said main door panel for movement of said side panels laterally relative to said main door panel for maintaining closure of the door upon distortion of the frame, said side panel mounting means mounting said side panels for pivotal movement on the rear face of the main door panel.
Dependencies are inferred from the claim text.