Mine door system
AssigneeJack Kennedy Metal Products, Inc.
InventorsWilliam R. Kennedy, John M. Kennedy
Life of this patent
Estimating the term…
Abstract
A mine door system adapted for installation and a passageway in a mine, comprising a door frame adapted to be installed in the passageway and defining a doorway spaced below a ceiling of the passageway and mine doors hingedly mounted on the door frame for movement between open and closed positions. The system further comprises a top panel structure for substantially closing the space between the door frame and the ceiling of the passageway, the top panel structure being readily contractible heightwise of the passageway without loss of its structural integrity to accommodate a convergence of the ceiling and floor of the passageway without any substantial heightwise deformation of the door frame.
Claims21
A mine door system for installation in a passageway in a mine, comprising a door frame adapted to be installed in the Passageway to define a doorway, mine door means, means for mounting said mine door means on said door frame for movement between open and closed positions, a top panel structure for substantially closing the space between the doorway and the ceiling of the passageway, said top panel structure being readily contractible heightwise of the passageway without loss of its structural integrity to accommodate a convergence of the ceiling and floor of the passageway without any substantial heightwise deformation of said door frame.
A mine door adapted for hinged mounting in a doorway formed by a door frame installed in the passageway in a mine, the mine door being generally rectangular in shape and fabricated of sheet metal and having a substantially continuous reinforcing structure of substantially rectangular cross section around the perimeter of the door on a first face of the door, the door comprising upper and lower door panels, each door panel having relatively narrow upper and lower flanges running along respective top and bottom edges of the door panel and projecting generally horizontally from the door panel on said first face of the door, said door panels being disposed one above the other in generally coplanar relation with the upper flange of the lower door panel in face-to-face relation with the lower flange of the upper door panel, an elongate upper reinforcing member cooperative with said upper flange of said upper door panel to form said reinforcing structure along the top of the door, and a lower reinforcing member cooperative with said lower flange of the lower door panel to form said reinforcing structure along the bottom of the door.
Dependencies are inferred from the claim text.