Door system for a mine stopping

Details Door system for a mine stopping Door system for a mine stopping

1991-07-24

1992-12-08

Luebke, Renee S.

Movable or removable closures

With means mounting closure for swinging

With latch or lock

292241, 292204, E05C 1704

Patent

active

051686678

ABSTRACT:
A door system for use in a mine stopping comprises a door frame for installation in the stopping to define a doorway, a door hinged to a first side of the door frame for swinging between an open position and a closed position in which the door closes the doorway, and a latch for latching the door in its closed position. The latch comprises a strike which is secured to a second side of the door frame generally opposite the first side and which has a strike plate portion disposed in the doorway in a plane generally perpendicular to the plane of the doorway and spaced from the second side of the door frame thereby to create a void between the strike plate portion and the second side of the doorway. The strike plate portion has a latching aperture therein. A latching bar is mounted on one face of the door for pivotal movement on an axis generally perpendicular to the door between a latching position in which the latching bar is adapted to project through the latching aperture and into the void to latch the door closed, and a release position in which the latching bar is removed from the latching aperture to permit the door to be opened.

REFERENCES:
patent: 385906 (1888-07-01), Chase
patent: 444826 (1891-01-01), Gloekler
patent: 879811 (1908-02-01), Burgess
patent: 1693912 (1928-12-01), Worthen
patent: 1704560 (1929-03-01), Doering
patent: 1897127 (1933-02-01), Johnson
patent: 4082331 (1978-04-01), Kennedy et al.

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