Access door

Details Access door Access door

1976-06-29

1978-07-04

Kannan, Philip C.

Movable or removable closures

Mounted for multidirectional or oblique movement

Swings on plural axes; e.g., pivotal link arms

49380, 49398, 49501, E05D 1540

Patent

active

040980243

ABSTRACT:
An access door for installation in a rough opening formed in a building ceiling or wall including an outer framework having an opening adapted to be fitted in the rough opening and secured to the ceiling or wall, a cover for opening and closing the opening in the outer framework, and link hinges for pivotally connecting the cover to the outer framework, whereby when the cover is released, the cover has imparted a vertical descent movement thereto. Rapid opening and closing pivotal movement of the cover by gravity is controlled, and the opening angle of the cover can be made great.

REFERENCES:
patent: 1871342 (1932-08-01), Potter
patent: 3302331 (1967-02-01), Sturm et al.
patent: 3950894 (1976-04-01), Dimalo

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