Personnel door for a RF shielded room

Details Personnel door for a RF shielded room Personnel door for a RF shielded room

1989-03-30

1990-09-04

Brittain, James R.

Movable or removable closures

Mounted for multidirectional or oblique movement

Sequential translation and swinging

49258, 49477, 174 35MS, E05F 702

Patent

active

049533240

ABSTRACT:
A personnel door for sealing a room having a source of Radio Frequency (RF) radiation. The door when swung into a closed position can be energized to be partially disposed in an opening below floor level directly beneath the door. Sealing between the door and the door frame of the room can occur around the borders of the door including the part disposed in the opening below floor level. A step up into the room or use of a ramp to gain access to the room is thereby eliminated. In the preferred embodiment, the door is retained above the opening below floor level by springs and energized to move vertically downward into the opening against the force of the springs by an air cylinder.

REFERENCES:
patent: 1775681 (1930-09-01), Morino
patent: 2113677 (1938-04-01), Carroll
patent: 3346992 (1967-10-01), Lodge
patent: 3820282 (1974-06-01), Korylak
patent: 4370831 (1983-02-01), Hamilton

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