Static structures (e.g. – buildings) – Processes – Requiring soil work
Patent
1981-03-20
1983-09-27
Friedman, Carl D.
Static structures (e.g., buildings)
Processes
Requiring soil work
52 39, 52698, 411340, 411346, G09F 718
Patent
active
044061080
ABSTRACT:
A suspended ceiling is installed in position by the use of a special nail construction. The nail has a pivotally mounted end which will maintain its straight configuration when it is being driven into a solid ceiling material. Should the nail be driven into a hollow ceiling material, the end of the nail will be permitted to pivot within the hollow area and the end of the nail then functions as a retainer to hold the nail in position in the ceiling material so that the suspended ceiling may be suspended from the retained nail.
REFERENCES:
patent: 4196883 (1980-04-01), Einhorn
Beck Martin J.
Boesel George F. W.
Armstrong World Industries Inc.
Friedman Carl D.
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