Fibre reinforced plastics structure

Details Fibre reinforced plastics structure Fibre reinforced plastics structure

1977-05-02

1978-08-29

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Laminated, embedded member or encased material

416226, 416239, 416248, B64C 2746

Patent

active

041100565

ABSTRACT:
This invention concerns fibre reinforced plastics structures, and is particularly concerned with the attachment of such structures, for example, a helicopter rotor blade, to a supporting metal member by bolting through holes provided in the structure. Accordingly the invention teaches an arrangement in which the or each attachment hole is defined by at least two metal bushes secured in the structure with the outer ends of the outermost bushes flush with the surfaces of the structure and so that the bushes are spaced-apart axially within the structure.
In a preferred embodiment, a resilient washer is located in the spacing between ends of adjacent bushes and in contact therewith.

REFERENCES:
patent: 2388954 (1945-11-01), Corliss
patent: 2915152 (1959-12-01), Graham
patent: 3004607 (1961-10-01), Linnabery et al.
patent: 3321019 (1967-05-01), Dmitroff
patent: 3622249 (1971-11-01), Hayashi et al.
patent: 3923422 (1975-12-01), Ianniello et al.

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