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. 01, 1992
Filed:
Mar. 31, 1991
Shigeo Toya, Ibaraki, JP;
Yoshiyuki Hiramoto, Ibaraki, JP;
Koji Sasaki, Ibaraki, JP;
Koichi Abe, Ibaraki, JP;
Tatsuo Teraoka, Ibaraki, JP;
Hirokazu Shiga, Ibaraki, JP;
Yasunori Yoshie, Tokyo, JP;
Hitachi Cable, Ltd., Tokyo, JP;
NKK Corporation, Tokyo, JP;
Abstract
Metal pipes containing optical fibers are connected to each other directly or indirectly by use of a sleeve. In case of using the sleeve, the sleeve is connected at one end to one of the metal pipes, after the optical fibers are connected. Then, the sleeve is elongated by a predetermined length, so that the sleeve is connected at the other end to the other metal pipe. Consequently, no tensile stress resides in the connected optical fibers in the connected structure. When the metal pipes are connected directly to each other, one or both of the metal pipes are elongated, after the optical fibers are connected. Then, the metal pipes are connected by use of the elongated portions. Consequently, the same result is obtained as using the sleeve.