Combination door and door frame

Details Combination door and door frame Combination door and door frame

1990-03-07

1991-05-14

Smith, Gary L.

Movable or removable closures

With means mounting closure for swinging

Closure nests within portal frame

49395, 49504, 292202, 292241, E05D 700

Patent

active

050144634

ABSTRACT:
A combination door and door frame primarily designed for blast shelters wherein the hinged door, which in locked position is designed to withstand external overpressures resulting from detonation of either nuclear or conventional weapons, swings inwardly when opened, thus avoiding the objection of outwardly opening doors which can be blocked by rubble, debris, soil, etc. projected by the force of the explosion piling up against the door resulting in the occupants becoming entombed in the shelter.

REFERENCES:
patent: 376010 (1888-01-01), Redline
patent: 2335450 (1943-11-01), Sandberg
patent: 2850126 (1958-09-01), Furney
patent: 3159093 (1964-12-01), Rosenfeld
patent: 3189951 (1965-06-01), Rosenfeld
patent: 3209663 (1965-10-01), Baier
patent: 3861083 (1975-01-01), Goiot
patent: 3987596 (1976-10-01), Wolf
patent: 4523407 (1985-06-01), Miller
patent: 4685249 (1987-08-01), Jacox

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