Static structures (e.g. – buildings) – Composite prefabricated panel including adjunctive means – Sandwich or hollow with sheet-like facing members
Patent
1995-12-15
1998-09-22
Friedman, Carl D.
Static structures (e.g., buildings)
Composite prefabricated panel including adjunctive means
Sandwich or hollow with sheet-like facing members
527295, 527306, 527931, 228118, 228181, 228190, 428178, 428593, 428594, E04C 234
Patent
active
058097376
ABSTRACT:
The present invention provides a method of making a frame, particularly for the aircraft industry, having a central member (34) and one or more cantilever ribs (32); such a frame can be made by forging or machining but these are time-consuming and expensive. According to the present invention such frames are made by diffusion bonding and superplastic forming techniques, whereby a pack of sheets are bonded together except in certain areas. Gas is injected into those areas to inflate the pack superplastically to form one or more closed cells (16). The top of the cells is then machined off along line 23, while the side walls of the cells are retained, to provide a frame having cantilever ribs (32).
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Collier Alan Derek
Eastham John
Johnston Stephen Harold
British Aerospace PLC
Friedman Carl D.
Kang Timothy B.
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