Non-metallic composite piano hinge

Details Non-metallic composite piano hinge Non-metallic composite piano hinge

1985-11-01

1989-03-07

Silverberg, Fred

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Hinge

Including laminated leaf

16385, 16DIG13, E05D 500

Patent

active

048094021

ABSTRACT:
A high strength composite piano hinge having an integral structure and of particular utility in aircraft, formed of two similar half portions each comprising a flange and an integrally formed loop, the integral flange and loop comprised of composite tape, fabric or filament, formed of fiber reinforced heat curable resin such as graphite fibers impregnated with epoxy resin. The loop can be formed in one embodiment by wrapping the tape or fabric around a pin, with the flanges of the hinge secured together, as by curing the composite. Stitching can be provided across the flanges adjacent to the loop, to reinforce the loop, and prevent peeling of the composite laminates or plies. The thickness of the flanges can be equal to or smaller than the outer diameter of the loop. Additional composite material or laminates can be co-cured to the flanges. After final curing of the composite material of the piano hinge, the loop is cut out at spaced intervals along the axis thereof, to provide knuckles and form one-half of the piano hinge. A pair of such hinge half portions are juxtaposed and aligned to provide the completed piano hinge, with a pin passed through the aligned knuckles.

REFERENCES:
patent: 3445052 (1969-05-01), Lewallen
patent: 3916480 (1975-11-01), Smith
patent: 4367260 (1983-01-01), Krause
patent: 4545090 (1985-10-01), Redmond

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