US5090793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber composite insulator
Assignee: NGK Insulators Ltd
•
Filing: 1991-04-10
•
Granted: 1992-02-25
•
Expires: 2011-04-10
Abstract
Abstract An optical fiber composite insulator including a hollow insulator body having an axial through-hole and at least one optical fiber extended through the through-hole and hermetically sealed to the inner surface of the through-hole by a sealing material. A relationship between a condition of the inner surface of the through-hole and the sealing material, a relationship between the inner diameters of the through-hole and the outer diameter of the hollow insulator body or a coating material on the optical fiber are selected to provide high insulating property, mechanical strength and airtight property of the optical fiber composite insulator.
Inventors
- 👤 Shoji Seike
- 👤 Toshiyuki Mima
- 👤 Masayuki Nozaki
- 👤 Naoki Tani
- 👤 Mitsuji Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:19
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4417; G02B6/442; G02B6/46; G02B6/50; H; H01; H01B; H01B17/00; H01B17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
An optical fiber composite insulator comprising a hollow insulator body having a central through-hole extending in an axial direction thereof, and at least one optical fiber extending through the through-hole, the central through-hole being filled with an organic material in a central portion of the axial direction thereof and both end portions of the through-hole being sealed with an inorganic material, wherein at the central portion of the through-hole filled with the organic material the inner surface of the through-hole is a glazed surface, and each inner surface of the end portions of the through-hole sealed with the inorganic material is a polished surface.
Claim 2
Dependent Claim
104 words
An optical fiber composite insulator comprising a hollow insulator body having a central through-hole extending in an axial direction thereof, and at least one optical fiber extending through the through-hole, the central through-hole being filled with an organic material in a central portion of the axial direction thereof and both end portions of the through-hole being sealed with an inorganic material, wherein at the central portion of the through-hole filled with the organic material the inner surface of the through-hole is a glazed surface, and each inner surface of the end portions of the through-hole sealed with the inorganic material is a polished surface.
References Cited (Backward Citations)
US3485940A
Cited
US4653846A
Cited
JPS60158402A
Cited
US4613727A
Cited
JPS63194303A
Cited
EP0297728A2
Cited
US4810836A
Cited
US4921322A
Cited
US4833278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |