US5061034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent connector for optical fibers
Assignee: Nippon Electric Glass Co Ltd
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Filing: 1989-06-30
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Granted: 1991-10-29
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Expires: 2009-06-30
Abstract
Abstract A permanent connector for optical fibers comprises a protective glass tube (2), a capillary tube (1) received therein and eccentrically joined thereto, the two tubes being made of ultraviolet-transmitting glass, and an adhesive-passing groove (1c) formed in the middle portion of the capillary tube (1) and opening on the side opposite to the side where they are joined together. An ultraviolet-curing type adhesive agent is charged into the permanent connector for optical fibers and the ends of optical fibers (3, 4) are inserted thereinto through the opposite ends thereof until the clads (3a, 4a) are butted against each other in the capillary tube (1) while pushing out the adhesive agent and air. And ultraviolet rays are radiated to cure the adhesive agent (6), thereby connecting the optical fibers (3, 4) together.
Inventors
- 👤 Junji Fujikawa
- 👤 Fumiaki Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:40
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/255; G02B6/2558; G02B6/2555
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A permanent connector for optical fibers characterized by comprising a capillary tube made of ultraviolet-transmitting glass which has an accurately produced inner diameter slightly greater than the outer diameter of the clads of optical fibers, tapered portions on the opposite ends of the inner diameter, and an adhesive-passing groove formed in the middle portion and having a depth which is not more than 1/2 of the inner diameter, and an ultraviolet-transmitting protective glass tube which has an inner diameter greater than the outer diameter of the capillary tube and to which the capillary tube is eccentrically joined in said inner diameter on the side opposite to the adhesive-passing groove to define a clearance between said inner diameter and the outer diameter of the capillary tube on the side where the adhesive-passing groove is formed.
Claim 2
Dependent Claim
134 words
A permanent connector for optical fibers characterized by comprising a capillary tube made of ultraviolet-transmitting glass which has an accurately produced inner diameter slightly greater than the outer diameter of the clads of optical fibers, tapered portions on the opposite ends of the inner diameter, and an adhesive-passing groove formed in the middle portion and having a depth which is not more than 1/2 of the inner diameter, and an ultraviolet-transmitting protective glass tube which has an inner diameter greater than the outer diameter of the capillary tube and to which the capillary tube is eccentrically joined in said inner diameter on the side opposite to the adhesive-passing groove to define a clearance between said inner diameter and the outer diameter of the capillary tube on the side where the adhesive-passing groove is formed.
Claim 3
Dependent Claim
38 words
A permanent connector for optical fibers as set forth in claim 1, characterized by having an ultraviolet-curing type adhesive agent injected into the permanent connector for optical fibers, the whole being wrapped in a light screening packaging material.
Claim 4
Dependent Claim
86 words
A permanent connector for optical fibers as set forth in claim 1 or 2, characterized by incorporating an adapter tube made of ultraviolet-transmitting glass adapted to be applied to optical fibers whose coats have a small outer diameter, said adapter tube having an outer diameter slightly smaller than the inner diameter of the protective glass tube and an inner diameter slightly greater than the outer diameter of the coats of optical fibers, said adapter tube having tapered portions on the opposite ends of said inner diameter.
References Cited (Backward Citations)
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US4784458A
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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) | 1994-10-28 | 1995-04-29 | 1995-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-28 | 1999-04-29 | 1999-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-28 | 2003-04-29 | 2003-10-29 | $7700.00 | Window Closed / Lapsed |