Static structures (e.g. – buildings) – Facer held by stiffener-type frame – Facer back abuts and conceals frame
Patent
1989-05-23
1990-07-31
Friedman, Carl D.
Static structures (e.g., buildings)
Facer held by stiffener-type frame
Facer back abuts and conceals frame
52484, 52474, 52488, E04B 552
Patent
active
049441299
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a ceiling lining of metal, consisting of a supporting grid and of cassettes arranged in the grid compartments of the supporting grid which is composed of longitudinal struts and of transverse struts connected to said longitudinal struts, each longitudinal strut and each transverse strut having projections which are arranged on either side at the lower ends of said struts, extend in the longitudinal directions thereof, are provided with seals, and rest in a tight manner on the cassettes, the longitudinal struts being designed as essentially rectangular hollow profiles.
Ceiling linings of metal are used preferably to seal off rooms in the clinical field, in laboratories, or to provide gas-tight sealing of the ceilings of super-purity rooms in manufacturing facilities. Since the ceiling surfaces are often very large, a sufficient gas-tightness must be guaranteed on the one hand, and the ceiling lining must meet high optical requirements on the other hand.
From West German Patent 26 24 956 there is known a suspended ceiling in which, for the sake of saving material, the support bars are provided with a hollow space. Said hollow space may have various forms which are matched, depending on the material to be saved, with the respective forms of the support bars. There is, however, no possibility of attaching ancillary devices to the support bars without impairing the tightness thereof.
The present invention is based upon the problem of providing a ceiling lining of the above mentioned kind, which is of simple structure, optically pleasant, provides safe tightness and permits the mounting of additional ancillary devices or installations.
According to the present invention, this problem is solved in that the hollow profile is designed in form of a closed duct and that further the longitudinal strut has a region of tubular cross-section for mounting suspended elements.
The ceiling lining is characterized by a number of significant advantages. Since the longitudinal strut comprises not only a duct but also a cross-sectional region, it can be suspended irrespective of any other installations mounted thereto. On the one hand, electrical cables or other conduits, e.g. water conduits to be connected to a sprinkler installation, can be guided in the closed duct, and on the other hand, ancillary devices such as partitions, additional lamps or the like, can be attached to the undersides of the longitudinal struts, and screws, dowels or rivets which are used for attaching purposes can neither penetrate said longitudinal strut nor cause any untightness. This is particularly advantageous in those cases when in a very large room installations such as e.g. partitions are to be mounted for a limited period of time only. When such installations are removed at a later time, the boreholes which may possibly remain in the longitudinal struts do not impair the tightness of the ceiling lining. As the longitudinal struts exhibit a sufficient rigidity, it is possible according to the invention to attach further ancillary devices even of larger weight such as e.g. lights in the medical field, suspensions for laboratory apparatuses or the like. Advantageously, there may be projections which are designed as ducts. In such embodiment there are then two ducts available in each longitudinal strut so that the possibilities of applying ancillary devices are considerably increased.
In a particularly advantageous embodiment the longitudinal strut is designed in such manner that the duct is arranged in the middle section thereof and the region of tubular cross-section is arranged thereabove. Due to such design the longitudinal strut may be narrower, and additionally it is excluded that unintentional through-bores causing untightness are made through any parts of the longitudinal strut.
In order to provide a simple possibility of suspending the longitudinal struts, it may be of advantage that the region of tubular cross-section be U-shaped so that suspension elements can be suspended therein. In such embodiment it is
REFERENCES:
patent: 3327438 (1967-06-01), Cooper
patent: 3596425 (1971-08-01), Kodaras
patent: 3602473 (1971-08-01), Van Riet
patent: 4678487 (1987-07-01), Cadwell, Jr. et al.
Friedman Carl D.
Hartleif Metalldecken GmbH
Hoffert Linda J.
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