Inspection cover arrangement

Details Inspection cover arrangement Inspection cover arrangement

1989-11-20

1991-03-12

Smith, Gary L.

Movable or removable closures

Removable closure

49465, 49469, 49504, E06B 332

Patent

active

049983814

ABSTRACT:
An inspection cover arrangement with an inspection mounting and an inspection cover, the inspection mounting including frame sections of aluminum, and the inspection cover having cover sections of aluminum is disclosed. The frame sections are so-to-speak reinforced by steel backup retaining sections and overlapping steel corner angles. The cover sections are reinforced by steel backup sheet strips and overlapping steel corner angles, so that in case of exposure to flame action a steel skeleton remains in place for the inspection mounting as well as for the inspection cover, even if the aluminum sections melt down. Because of this the inspection cover arrangement is distinguished by high resistance to fire or by a long period during which it resists the action of fire.

REFERENCES:
patent: 2559764 (1951-07-01), Goldberg
patent: 2727596 (1955-12-01), Smith
patent: 3107759 (1963-10-01), Day et al.
patent: 3654734 (1972-04-01), Lehman
patent: 4160421 (1979-07-01), Heinen
patent: 4299059 (1981-11-01), Smith
patent: 4307543 (1981-12-01), Schulthess
patent: 4674248 (1987-06-01), Hall
patent: 4913127 (1990-04-01), Dugger

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