Patent US5029969A successfully refreshed from Google Patents.
US5029969A
Expired / Lapsed
US
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Optical fiber composite insulator and method of producing the same
Assignee: NGK Insulators Ltd
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Filing: 1989-10-16
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Granted: 1991-07-09
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Expires: 2009-10-16
Abstract
Abstract An optical fiber composite insulator comprises 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
2026-11-10 01:55
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: 11
Claim 1
Independent Claim
76 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one optical fiber extending through the through-hole, said optical fiber being hermetically sealed with a sealing material to an inner surface of said insulator body defining the through-hole, wherein said sealing material is an organic sealing material and the inner surface of said insulator body is a glazed surface formed by application of a glaze which is subsequently fired.
Claim 2
Dependent Claim
76 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one optical fiber extending through the through-hole, said optical fiber being hermetically sealed with a sealing material to an inner surface of said insulator body defining the through-hole, wherein said sealing material is an organic sealing material and the inner surface of said insulator body is a glazed surface formed by application of a glaze which is subsequently fired.
Claim 3
Dependent Claim
70 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one optical fiber extending through the through-hole, said optical fiber being hermetically sealed with a sealing material to an inner surface of said insulator body defining the through-hole, wherein a ratio d/D of an inner diameter "d" of the through-hole to an outer diameter "D" of said insulator body is at most 0.25.
Claim 4
Dependent Claim
70 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one optical fiber extending through the through-hole, said optical fiber being hermetically sealed with a sealing material to an inner surface of said insulator body defining the through-hole, wherein a ratio d/D of an inner diameter "d" of the through-hole to an outer diameter "D" of said insulator body is at most 0.25.
Claim 5
Dependent Claim
17 words
The optical fiber composite insulator of claim 2, wherein said inner diameter is at least 3 mm.
Claim 6
Dependent Claim
104 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one coated optical fiber extending through the through-hole, said optical fiber being hermetically sealed to an inner surface of said insulator body defining the through-hole, wherein a coated portion of said optical fiber is hermetically sealed with an organic sealing material to the inner surface of said insulator body defining the through-hole, the coated portion of said optical fiber including a buffer layer comprising a resin having a Young's modulus of at least 10 kg/mm 2 and a tensile strength of at least 300 kg/cm 2 .
Claim 7
Dependent Claim
104 words
An optical fiber composite insulator comprising an hollow insulator body having an axial through-hole and at least one coated optical fiber extending through the through-hole, said optical fiber being hermetically sealed to an inner surface of said insulator body defining the through-hole, wherein a coated portion of said optical fiber is hermetically sealed with an organic sealing material to the inner surface of said insulator body defining the through-hole, the coated portion of said optical fiber including a buffer layer comprising a resin having a Young's modulus of at least 10 kg/mm 2 and a tensile strength of at least 300 kg/cm 2 .
Claim 8
Dependent Claim
37 words
The optical fiber composite insulator of claim 4, wherein said organic sealing material consists of silicone rubber having an elongation at breakdown of at least 300% and a tensile strength of at least 30 kg/cm 2 .
Claim 9
Independent Claim
88 words
A method of producing an optical fiber composite insulator, comprising the steps of: coating a portion of an optical fiber with a resin having a Young's modulus of at least 10 kg/mm 2 and a tensile strength of at least 300 kg/cm 2 ; primer treating said coated portion of said optical fiber; passing said optical fiber through a through-hole formed in an hollow insulator body; and hermetically sealing said optical fiber with an organic sealing material to an inner surface of said insulator body defining the through-hole.
Claim 10
Independent Claim
88 words
A method of producing an optical fiber composite insulator, comprising the steps of: coating a portion of an optical fiber with a resin having a Young's modulus of at least 10 kg/mm 2 and a tensile strength of at least 300 kg/cm 2 ; primer treating said coated portion of said optical fiber; passing said optical fiber through a through-hole formed in an hollow insulator body; and hermetically sealing said optical fiber with an organic sealing material to an inner surface of said insulator body defining the through-hole.
Claim 11
Dependent Claim
58 words
The method of claim 6, wherein silicone rubber is filled in a clearance between said coated portion of said optical fiber and the inner surface of said insulation body defining the through-hole, and is cured at a temperature of not less than 60° C. for hermetically sealing said optical fiber to the inner surface of said insulator body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |