The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1989
Filed:
Feb. 03, 1988
Yoshinobu Kitayama, Kanagawa, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A composite fiber-optic overhead ground wire having an optical unit which includes an optical fiber protecting tube, a spacer having helical grooves formed in its outer periphery, and multiple optical fiber units accommodated in the grooves of the spacer. Each of the optical fiber units includes multiple coated optical fibers formed of an optical glass fiber and a primary coating layer on the outer periphery of the optical glass fiber. The coated optical fibers are stranded around the outer periphery of a tension member. A first heat-resistant thin tape is wound in an overlapping manner around an outer periphery of the stranded coated optical fibers. The first heat-resistant thin tape is surrounded by a layer of interposition material which has a cushioning effect. A second heat-resistant thin tape is wound in an overlapping manner around the outer periphery of the interposition material.