US4487474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical connector with ceramic plugs and sleeve
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1981-07-06
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Granted: 1984-12-11
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Expires: 2001-07-06
Abstract
Abstract An optical connector in which a pair of ceramic optical plugs having optical fibers extending coaxially therethrough are fitted within a ceramic sleeve. In one embodiment, an inner surface of the sleeve is provided with a longitudinal groove extending from one end of the sleeve to the other so that air and dust will be expelled from the sleeve when plugs are inserted therein. A housing may be provided around the sleeve with a flange being formed on the housing. In another embodiment, a protective cover is provided surrounding each plug which is movable axially along the plug.
Inventors
- 👤 Mitsuaki Nishie
- 👤 Satoru Iguchi
- 👤 Ichiro Kono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:16
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/36; G02B6/38; G02B6/3807; G02B6/3833; G02B6/3847; G02B6/3849; G02B6/381; G02B6/3825; G02B6/3873; G02B6/3874; G02B6/3854; G02B6/389; G02B6/3894
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
An optical connector comprising: a ceramic plug; a plug support, a rear end of said ceramic plug being supported on a front end of said plug support, an optical fiber extending coaxially through said plug support and said ceramic plug terminating at a front end of said ceramic plug; a rotary ring disposed around said plug support fitted in an outer peripheral surface of said plug support; a coupling nut rotatably mounted around said rotary ring, said coupling nut having an outer peripheral surface provided with a front end stop projection and a rear end stop projection, said rotary ring being positioned behind said rear end stop projection, and said coupling nut being internally threaded for connection to a receptacle; a cylindrical protective cover having a radially inwardly projecting flange at its rear end, said protective cover being axially movable over said coupling nut; and a spacer provided between said coupling nut and said protective cover.
Claim 2
Dependent Claim
156 words
An optical connector comprising: a ceramic plug; a plug support, a rear end of said ceramic plug being supported on a front end of said plug support, an optical fiber extending coaxially through said plug support and said ceramic plug terminating at a front end of said ceramic plug; a rotary ring disposed around said plug support fitted in an outer peripheral surface of said plug support; a coupling nut rotatably mounted around said rotary ring, said coupling nut having an outer peripheral surface provided with a front end stop projection and a rear end stop projection, said rotary ring being positioned behind said rear end stop projection, and said coupling nut being internally threaded for connection to a receptacle; a cylindrical protective cover having a radially inwardly projecting flange at its rear end, said protective cover being axially movable over said coupling nut; and a spacer provided between said coupling nut and said protective cover.
Claim 3
Dependent Claim
47 words
The optical connector of claim 1 further comprising a receptacle threaded to receive a coupling nut at opposed ends thereof and having a hollow portion for receiving one said ceramic plug at each end thereof, ceramic plug having ends abutting each other when coupled to said receptacle.
Claim 4
Dependent Claim
31 words
The optical connector of claim 1 wherein said receptacle has an inner peripheral surface formed with a groove extending along an axial direction thereof over the entire length of said receptacle.
References Cited (Backward Citations)
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |