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US 5,271,986 AGranted
Structural member having a stiffener bead therein and comprising plies of composite material extending for the full length and width of the structural member and continuously through the stiffener bead, and the article so made
AssigneeUnited Technologies Corporation
InventorsAlexander C. Dublinski, Edward J. Fabian, Philip J. Ramey, Darryl M. Toni
Life of this patent
Estimating the term…
Abstract
A structural member made up of a plurality of bonded plies of high tensile strength woven fabric and molded to include at least one stiffener bead having elliptically shaped ends, and a structural part so fabricated.
Claims8
A structural member made of composite material comprising a plurality of plies of high strength woven fabric bonded together with a resin and including:
- a. a wall member fabricated from said fabric so bonded;
- and
- b. at least one stiffener bead in the wall member constituting an uninterrupted continuation of the composite material forming the wall member and wherein the stiffener bead is elongated along a given axis and concentric thereabout and tangentially joins the wall member about the full bead periphery, said stiffener bead having straight sides along its central portion and substantially elliptically shaped ends projecting smoothly from the straight sides, and further wherein said stiffener bead is shaped to define a sector of a circle when viewed in cross-section at its central portion, and to smoothly converge therefrom to define the elliptical ends.
Dependencies are inferred from the claim text.