Gravity closing fire-rated ceiling access door

Details Gravity closing fire-rated ceiling access door Gravity closing fire-rated ceiling access door

1986-03-25

1988-03-29

Bell, J. Karl

Static structures (e.g., buildings)

Window or window sash, sill, mullion, or glazing

Decorative grill attached to sash

49 5, 49213, E06B 500, E05F 102

Patent

active

047335114

ABSTRACT:
This disclosure relates to an access door assembly for a ceiling. The assembly includes a frame adapted to be attached to supports of the ceiling and mounted in a generally horizontal position, and a door which fits within the frame. Tracks on the frame receive rollers on the door for mounting the door for movement between open and closed position. The tracks are sloped to gravity actuate the door to the closed position.

REFERENCES:
patent: Re28346 (1975-02-01), Kouth et al.
patent: 1820127 (1931-08-01), Elkington
patent: 3359695 (1967-12-01), Gazerro
patent: 3910628 (1975-10-01), Nantau

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