Attachment of equipment to composite sandwich core structures

Details Attachment of equipment to composite sandwich core structures Attachment of equipment to composite sandwich core structures

1999-12-16

2001-01-09

Avila, Stephen (Department: 3617)

Ships

Bulkheads and doors

C114S078000

Reexamination Certificate

active

06170422

ABSTRACT:

The present invention relates generally to the attachment of equipment to bulkhead type of support structures.
BACKGROUND OF THE INVENTION
The attachment of equipment and distributed systems to stiffened steel bulkheads or overheads is straightforward and has been extensively used on board Naval vessels. The typical method is to weld a steel bracket or channel directly to a steel bulkhead or transverse frame to which the specific equipment is then directly attached by means of any suitable mechanical fastening arrangement. Welding attachment methods heretofore developed and utilized are not found to be suitable, reliable or desirable for survival of the shock and seaway loading of the attached equipment on composite sandwich core types of bulkheads. It is therefore an important object of the present invention to provide for simple, affordable and more reliable attachment of equipment to composite sandwich construction types of support structure, such as that currently associated with marine vessel bulkheads.
SUMMARY OF THE INVENTION
In accordance with the present invention, attachment of equipment to one of the rigid face skins of a bulkhead having a less rigid core sandwiched between such face skins, is initiated by formation of a pocket within the bulkhead at a selected location, into which a rigid insert is adhesively anchored. The insert which projects from such pocket is releasably attached by a toggle bolt fastener to a load transfer element located externally of the bulkhead in close spaced relation to the rigid face skin through which the insert projects into the pocket. Such load transfer element is attached by any suitable means to the equipment in spaced relation to the pocket location at which a relatively large load transfer interface surface is formed in the bulkhead by the pocket for adhesive bonding thereof to the insert.


REFERENCES:
patent: 3812808 (1974-05-01), Shirota et al.
patent: 4038799 (1977-08-01), Shanks
patent: 4238913 (1980-12-01), Holmes
patent: 4261146 (1981-04-01), Holmes
patent: 4508047 (1985-04-01), Bordat

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