Patent US4722584A successfully refreshed from Google Patents.
US4722584A
Expired / Lapsed
US
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Optical connector ferrule and process for production thereof
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-03-22
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Granted: 1988-02-02
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Expires: 2005-03-22
Abstract
Abstract An optical connector ferrule and a method for producing such an optical connector ferrule wherein the bonding between a metal sleeve and the main body of the ferrule, which is made of a synthetic resin material, is markedly improved. A rearward end of the metal sleeve is embedded in the synthetic resin material, preferably, around a flange of the main body. The metal sleeve may be provided with irregularities on one or both of the inner and outer surfaces thereof to further improve the adhesion between the resin of the main body and the metal sleeve.
Inventors
- 👤 Toshiaki Kakii
- 👤 Koichiro Matsuno
- 👤 Norio Kashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3865; G02B6/3834; G02B6/3841
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
In an optical connector ferrule comprising: a main body of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material, wherein said metal sleeve has an irregular form and said synthetic material conforms to the inner surface of said metal sleeve.
Claim 2
Dependent Claim
90 words
In an optical connector ferrule comprising: a main body of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material, wherein said metal sleeve has an irregular form and said synthetic material conforms to the inner surface of said metal sleeve.
Claim 3
Dependent Claim
23 words
The optical connector ferrule of claim 1, wherein said end of said optical fiber extends beyond a forward end of said metal sleeve.
Claim 4
Dependent Claim
30 words
The optical connector ferrule of claim 1, wherein the end of said optical fiber and an end of said main body extend beyond a forward end of said metal sleeve.
Claim 5
Dependent Claim
82 words
In an optical connector ferrule comprising: a main body of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material and wherein said metal sleeve has irregularities formed on an inner surface thereof.
Claim 6
Dependent Claim
82 words
In an optical connector ferrule comprising: a main body of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material and wherein said metal sleeve has irregularities formed on an inner surface thereof.
Claim 7
Dependent Claim
30 words
The optical connector ferrule of claim 1, wherein said end of said optical fiber and an end of said main body extend beyond a forward end of said metal sleeve.
Claim 8
Dependent Claim
85 words
In an optical connector ferrule comprising: a main body made of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material and wherein said metal sleeve has irregularities extending to both inner and outer surfaces thereof.
Claim 9
Dependent Claim
85 words
In an optical connector ferrule comprising: a main body made of a synthetic resin material, an optical fiber extending through said main body having a polished end at one end of said main body, and a metal sleeve constituting a part of an outer surface of said ferrule, the improvement wherein an end of said metal sleeve rearward of said optical fiber end is embedded in said synthetic resin material and wherein said metal sleeve has irregularities extending to both inner and outer surfaces thereof.
Claim 10
Dependent Claim
30 words
The optical connector ferrule of claim 6, wherein said end of said optical fiber and an end of said main body extend beyond a forward end of said metal sleeve.
References Cited (Backward Citations)
US4173389A
Cited
US4220398A
Cited
US4310216A
Cited
US4264128A
Cited
JPS5827112A
Cited
GB2121979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |