Mine door system

Details Mine door system Mine door system

1989-06-05

1990-03-27

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

52217, 405150, E21D 900, E21F 100

Patent

active

049115774

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.

REFERENCES:
patent: 2834071 (1958-05-01), Camerino
patent: 4478535 (1984-10-01), Kennedy et al.
patent: 4484837 (1984-11-01), Kennedy et al.

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