Door frame and door assembly for a mine stopping

Details Door frame and door assembly for a mine stopping Door frame and door assembly for a mine stopping

1977-05-27

1978-10-10

Downey, Kenneth

Movable or removable closures

With means mounting closure for swinging

Closure overlies portal frame

49485, E05D 700

Patent

active

041188942

ABSTRACT:
A door frame and door assembly for a doorway in a mine stopping in which the door is hinged to the top of the door frame, and hangs down at an angle from the top of the frame when closed with sealing surfaces of the door at the top, bottom and sides of the door in face-to-face engagement with forward faces of the top, bottom and sides of the frame, the forward face of the bottom being forward of the forward face of the top, and the forward faces of the sides of the frame being inclined.

REFERENCES:
patent: 1948602 (1934-02-01), Tracy
patent: 2640230 (1953-06-01), Eck et al.
patent: 2886861 (1959-05-01), Bartlett

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