Shape-retaining fiber optic cables having limited bend radius

Optical waveguides – Optical transmission cable – Loose tube type

Reexamination Certificate

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C385S100000

Reexamination Certificate

active

07460753

ABSTRACT:
In accordance with this invention, fiber optic cables are provided whose shape may be formed and retained while maintaining a limited bend radius. These features are produced by incorporating a compact compliant internal cable member into the cable structure. The compliant internal member consists not only of the fiber optic cable, but also of ductile and non-ductile elements. The ductile element is advantageously a tube or a wire which readily deforms to retain a given shape, and may be reshaped if desired. The non-ductile element, which resists sharp bending of the cable during shaping, comprises a substantially non-ductile elongated element disposed within the cable and configured to oppose excessively sharp bending along its length. Proper selection of the cross-sections and materials used in these elongated members produces a proper balance between shape retention and bending radius.

REFERENCES:
patent: 3766374 (1973-10-01), Fairchild
patent: 4705352 (1987-11-01), Margolin et al.
patent: 5386489 (1995-01-01), Stokes
patent: 6169834 (2001-01-01), Keller
patent: 6256438 (2001-07-01), Gimblet
patent: 2005/0013565 (2005-01-01), Mohler et al.

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