Pressure-resistant sheath of a submarine optical fibre cable and method for the production thereof

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United States of America Patent

PATENT NO 4867528
SERIAL NO

07026365

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Abstract

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Cross-sectionally fan-shaped metal segments 10a, 10b and 10c, shown in FIG. 1, are longitudinally assembled along an optical fibre to form a pressure-resistant sheath 10 for protecting an optical fibre unit for use in a transmission medium of a submarine optical fibre cable. The inner surfaces 11a, 11b, and 11c, shown in FIG. 1, of the metal segments 10a, 10b and 10c as well as all the contact faces 12a, 12b, and 12c also shown in FIG. 1 are so roughened that the adhesion force associated with the optical fibre unit 1 and the pressure-resistant sheath 10 and the metal segments themselves 10a, 10b and 10c can be strengthened enough to protect the optical fibre unit. Water penetration which may occur in case of cable damages can also be prevented.

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Patent Owner(s)

Patent OwnerAddress
NANIWA SEITEI CO LTD1-1 UCHIANDOJIMACHIDORI 1-CHOME HIGASHI-KU OSAKA-SHI OSAKA-FU 540
OCEAN CABLE CO LTDSIBUYA-KU TOKYO 150

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Funaki, Kiyoshi Tokyo, JP 3 17
Ikeda, Jiro Tokyo, JP 24 601
Mochizuki, Kenichi Tokyo, JP 21 109
Murao, Kazuhiko Higashiosaka, JP 3 20
Murao, Masatsugu Higashiosaka, JP 5 24
Murao, Mitsuaki Higashiosaka, JP 1 1
Murao, Yoshinori Higashiosaka, JP 2 5

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