US4812008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for connecting optical fibers
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1987-07-15
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Granted: 1989-03-14
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Expires: 2007-07-15
Abstract
Abstract A method and apparatus for connecting optical fibers using a grooved steel wire to position a pair of guide sleeves and a fitting sleeve into which a pair of optical fibers may be inserted so that end portions thereof bear against each other. A thermal melting adhesive sleeve and a thermal shrinking tube are provided to cover the steel wire, the guide sleeves and the fitting sleeve so that when the thermal melting adhesive sleeve and the thermal shrinking tube are heated, the thermal shrinking tube is shrinked while the adhesive sleeve is melted to integrate the steel wire, the fitting sleeve, the guide sleeves and the optical fibers with each other.
Inventors
- 👤 Yuzo Tokumaru
- 👤 Osamu Nishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/255; G02B6/2558
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A connection member for connecting optical fibers comprising: a wire member having a longitudinally extending groove defined in an outer surface thereof; a fitting sleeve attached to said wire member in said groove, said fitting sleeve having a longitudinal inner bore for receiving a bare optical fiber; a pair of guide sleeves attached to said wire member in said groove on each side of said fitting sleeve, each of said guide sleeves having a longitudinal bore for receiving a coated optical fiber; a thermal melting adhesive sleeve covering said wire member, said fitting sleeve and said guide sleeves; and a thermal shrinking tube covering said thermal melting adhesive sleeve.
Claim 2
Dependent Claim
109 words
A connection member for connecting optical fibers comprising: a wire member having a longitudinally extending groove defined in an outer surface thereof; a fitting sleeve attached to said wire member in said groove, said fitting sleeve having a longitudinal inner bore for receiving a bare optical fiber; a pair of guide sleeves attached to said wire member in said groove on each side of said fitting sleeve, each of said guide sleeves having a longitudinal bore for receiving a coated optical fiber; a thermal melting adhesive sleeve covering said wire member, said fitting sleeve and said guide sleeves; and a thermal shrinking tube covering said thermal melting adhesive sleeve.
Claim 3
Dependent Claim
26 words
A connection member according to claim 1, wherein said fitting sleeve further has an axial bore defined in a central portion thereof for receiving an adhesive.
Claim 4
Dependent Claim
27 words
A connection member for connecting optical fibers according to claim 1, wherein said thermal melting adhesive sleeve and said thermal shrinking tube are integral with each other.
Claim 5
Dependent Claim
19 words
A connection member for connecting optical fibers according to claim 1, wherein said wire member is formed of steel.
Claim 6
Independent Claim
143 words
A method of connecting optical fibers comprising the steps of: preparing a wire member having a longitudinally extending groove defined therein, a fitting sleeve having a longitudinally extending inner bore and a pair of guide sleeves each having a longitudinal bore defined therein; inserting a pair of coated optical fibers into said guide sleeves so that respective end surfaces of bare optical fibers of said coated optical fibers abut each other at the center of said fitting sleeve; covering said coated optical fibers with a thermal melting adhesive sleeve and a thermal shrinking tube; and heating said thermal melting adhesive sleeve and said thermal shrinking tube from the outside thereof so that said thermal shrinking tube is shrinked while said adhesive sleeve is melted to thereby integrate said steel wire, said fitting sleeve, said guide sleeves and said optical fibers with each other.
Claim 7
Independent Claim
143 words
A method of connecting optical fibers comprising the steps of: preparing a wire member having a longitudinally extending groove defined therein, a fitting sleeve having a longitudinally extending inner bore and a pair of guide sleeves each having a longitudinal bore defined therein; inserting a pair of coated optical fibers into said guide sleeves so that respective end surfaces of bare optical fibers of said coated optical fibers abut each other at the center of said fitting sleeve; covering said coated optical fibers with a thermal melting adhesive sleeve and a thermal shrinking tube; and heating said thermal melting adhesive sleeve and said thermal shrinking tube from the outside thereof so that said thermal shrinking tube is shrinked while said adhesive sleeve is melted to thereby integrate said steel wire, said fitting sleeve, said guide sleeves and said optical fibers with each other.
Claim 8
Dependent Claim
45 words
A method of connecting optical fibers according to claim 5, further comprising the steps of: providing an axial bore in said fitting sleeve, and pouring an adhesive into said fitting sleeve through said axial bore so as to fix said end surfaces to each other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |