Fire door assembly

Details Fire door assembly Fire door assembly

1977-09-23

1979-07-10

Yuen, Henry C.

Furnaces

Doors

Explosion relief doors

49485, 202248, 126190, 126194, F23M 700

Patent

active

041604210

ABSTRACT:
A fire door assembly for providing access to an enclosed space such as a furnace, fireplace, duct, tank or cistern including a movable flap having peripheral portions which can be positioned flush against a wall so as to close an access opening. A gasket or seal is provided along the access opening on the face of the outer wall.

REFERENCES:
patent: 300137 (1884-06-01), Saxe
patent: 1444013 (1923-02-01), Thomas
patent: 2192231 (1940-03-01), Klute
patent: 2327541 (1943-08-01), Matheny
patent: 2584404 (1952-02-01), Webb
patent: 3666904 (1972-05-01), Krajewski
patent: 4077389 (1978-03-01), Vogel

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