Thermally insulated, fire resistant attic door

Details Thermally insulated, fire resistant attic door Thermally insulated, fire resistant attic door

1980-03-10

1981-11-10

Kannan, Philip C.

Movable or removable closures

With means mounting closure for swinging

Closure nests within portal frame

49485, 49501, 49 37, 182 47, 182 81, E05D 700

Patent

active

042990599

ABSTRACT:
A ceiling-mounted attic door features a continuous outer panel of flame-resistant plaster board, an intermediate layer of thermal insulating material and marginal sealing gaskets and insulating strips arranged to thermally seal the marginal edges of the door when it occupies a normally closed position within its associated door opening.

REFERENCES:
patent: 2649237 (1953-08-01), Bjorklund et al.
patent: 3164869 (1965-01-01), Barkan
patent: 3299574 (1967-01-01), Alexeff et al.
patent: 3312030 (1967-04-01), Gillespie
patent: 3654067 (1972-04-01), Klein
patent: 3886686 (1975-06-01), Urbanick
patent: 3943663 (1976-03-01), Jechen et al.
patent: 4165591 (1979-08-01), Fitzgibbon

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