Swinging doors for shelters and to shelters equipped with such d

Details Swinging doors for shelters and to shelters equipped with such d Swinging doors for shelters and to shelters equipped with such d

1981-10-13

1984-01-31

Downey, Kenneth

Movable or removable closures

Closure surface moved to inoperative position flush-with-ground

49 33, E06B 1100

Patent

active

044281528

ABSTRACT:
An underground shelter (1, 2, 3) for aircraft is equipped with a vertical door (5) mounted for swinging about a lower horizontal axis (X), the swinging movements of this door being controlled by means of external jacks (13), with axes inclined with respect to the horizontal, adapted to be retracted into pits (16) which are closable when the door is closed.

REFERENCES:
patent: 1524956 (1925-02-01), Strauss
patent: 2547488 (1951-04-01), Potts
patent: 2837780 (1958-06-01), Younger

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