US5404416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical connector plug
Assignee: NTT Inc
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Filing: 1993-02-24
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Granted: 1995-04-04
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Expires: 2013-02-24
Abstract
Abstract To provide an optical connector which can slidably and stably support the optical connector element (ferrule) within the connector housing without increasing the axial length of the ferrule, the optical connector plug comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; and (c) a spring (203) housed within said plug housing to urge the flange portion of said plug ferrule against the shoulder portion (253) of said plug housing. A mated jack ferrule (201) is fitted to the small hollow portion (252) of said plug housing (202) via a sleeve holder (206) having a floating slit sleeve (205) therewithin so as to absorb an axial dimensional fitting error between the plug ferrule and the jack ferrule by axially urging the flange portion (201b) of said plug ferrule by an inner end of the sleeve holder (206) against said spring (203).
Inventors
- 👤 Shinichi Iwano
- 👤 Ryo Nagase
- 👤 Kazunori Kanayama
- 👤 Etsuji Sugita
- 👤 Yasuhiro Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:08
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/389; G02B6/3893; G02B6/381; G02B6/3817; G02B6/3818; G02B6/3821; G02B6/3825; G02B6/3826; G02B6/3831; G02B6/3833; G02B6/3847; G02B6/3849; G02B6/3869; G02B6/3873; G02B6/3874; G02B6/3875; G02B6/3878; G02B6/3879; G02B6/3897; G02B6/3822; G02B6/3877
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
An optical connector plug, comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; and (c) a spring (203) housed within said plug housing to urge the flange portion of said plug ferrule against the shoulder portion (253) of said plug housing; wherein said shoulder portion is shaded to accommodate axial advancement therethrough of a connector to be connected to said plug.
Claim 2
Dependent Claim
129 words
An optical connector plug, comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; and (c) a spring (203) housed within said plug housing to urge the flange portion of said plug ferrule against the shoulder portion (253) of said plug housing; wherein said shoulder portion is shaded to accommodate axial advancement therethrough of a connector to be connected to said plug.
Claim 3
Dependent Claim
181 words
An optical connector plug, comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; (c) a spring (203) housed within said plug housing to urge the flange portion (201b) of said plug ferrule (201) against the shoulder portion (253) of said plug housing; and a mated jack ferrule (201) fitted to the small hollow portion (252) of said plug housing (202) via a sleeve holder (206) having a floating slit sleeve (205) therewithin so as to absorb an axial dimensional fitting error between the plug ferrule and the jack ferrule by axially urging the flange portion (201b) of said plug ferrule by an inner end of the sleeve holder (206) against said spring (203).
Claim 4
Dependent Claim
181 words
An optical connector plug, comprising: (a) a plug housing (202) formed with a shoulder portion (253) between a large hollow portion (254) and a small hollow portion (252) and formed with no projection between said two portions; (b) a plug ferrule (201) connected to an optical fiber (204) and formed with a flange portion (201b) slidably fitted into the large hollow portion of said plug housing and an end portion (201a) passed through the small hollow portion of said plug housing; (c) a spring (203) housed within said plug housing to urge the flange portion (201b) of said plug ferrule (201) against the shoulder portion (253) of said plug housing; and a mated jack ferrule (201) fitted to the small hollow portion (252) of said plug housing (202) via a sleeve holder (206) having a floating slit sleeve (205) therewithin so as to absorb an axial dimensional fitting error between the plug ferrule and the jack ferrule by axially urging the flange portion (201b) of said plug ferrule by an inner end of the sleeve holder (206) against said spring (203).
Claim 5
Dependent Claim
32 words
The optical connector plug of claim 1, wherein the large hollow portion (254) of said plug housing and the flange portion (201b) of said plug ferrule are both formed into polygonal shape.
Claim 6
Dependent Claim
33 words
The optical connector plug of claim 3, wherein the large hollow portion (254) of said plug housing and the flange portion (201b) of said plug ferrule are both formed into chamfered square shape.
References Cited (Backward Citations)
US4548467A
Cited
EP0119013A2
Cited
US4611887A
Cited
US4541685A
Cited
US4892379A
Cited
US4850670A
Cited
EP0156608A2
Cited
EP0307518A2
Cited
US5157749A
Cited
EP0223608A2
Cited
US4759599A
Cited
EP0228063B1
Cited
EP0330231A2
Cited
US4895425A
Cited
EP0339876A1
Cited
US5016970A
Cited
US5121454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |