Pi-shaped preform

Details Pi-shaped preform Pi-shaped preform

2008-10-29

2011-12-20

Muromoto, Jr., Bobby (Department: 3765)

Textiles: weaving

Special-type looms

C139S38300A, C139SDIG001

Reexamination Certificate

active

08079387

ABSTRACT:
A woven preform for a reinforced composite material, which may be woven flat and folded into shape. The preform has a three-dimensional weave architecture with weft fibers woven to provide layer-to-layer interlocking of layers of warp fiber as well as interlocking of fibers within each layer. One or more legs extend from a base, the base and legs each having at least two layers of warp fibers. The legs may be parallel or angled to each other and/or may move along a sine wave in the warp and/or weft direction. The outer ends of the base and/or the legs preferably have tapers formed from terminating layers of warp fibers in a stepped pattern.

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