US4826276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber feedthrough assembly having a rigidizing arrangement therein
Assignee: Avago Technologies International Sales Pte Ltd
•
Filing: 1987-07-17
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Granted: 1989-05-02
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Expires: 2007-07-17
Abstract
Abstract A fiber feedthrough assembly having a rigidizing member in the form of a quartz tube surrounding an axial length of a glass fiber defined between a shoulder formed by the jacket of the fiber and the axially inner end of a hermetic seal. The coefficients of thermal expansion of the tube and the fiber are substantially equal.
Inventors
- 👤 Kathleen S. Abbott
- 👤 Frank M. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4248; G02B6/4219; G02B6/4236
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
In an optical fiber feedthrough assembly of the type having a sleeve, an optical fiber in the sleeve and a seal between the fiber and the sleeve, the fiber having a jacket thereon, the jacket being fixed to the sleeve with a portion of the jacket being removed to define a shoulder such that a predetermined axial length of the fiber is exposed between the shoulder and the seal, the jacket having the tendency to grow out in response to thermal cycling whereby the fiber may fracture and become discontinuous, wherein the improvement comprises: a rigidizing member in the form of a tube surrounding the predetermined axial length of the fiber, the tube being in abutting contact with the shoulder and in abutting contact with the seal, the combination of the tube and the fiber having a rigidity associated therewith such that the fiber is able to withstand the effects of grow out without fracturing.
Claim 2
Dependent Claim
155 words
In an optical fiber feedthrough assembly of the type having a sleeve, an optical fiber in the sleeve and a seal between the fiber and the sleeve, the fiber having a jacket thereon, the jacket being fixed to the sleeve with a portion of the jacket being removed to define a shoulder such that a predetermined axial length of the fiber is exposed between the shoulder and the seal, the jacket having the tendency to grow out in response to thermal cycling whereby the fiber may fracture and become discontinuous, wherein the improvement comprises: a rigidizing member in the form of a tube surrounding the predetermined axial length of the fiber, the tube being in abutting contact with the shoulder and in abutting contact with the seal, the combination of the tube and the fiber having a rigidity associated therewith such that the fiber is able to withstand the effects of grow out without fracturing.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein the combination of the tube and the fiber is able to withstand the effects of grow out of the jacket without fracturing after at least one thermal cycle from -55 degrees C. to 125 degrees. C.
Claim 4
Dependent Claim
42 words
The apparatus of claim 1 wherein the combination of the tube and the fiber is able to withstand the effects of grow out of the jacket without fracturing after at least ten thermal cycles from -55 degrees C. to 125 degrees C.
Claim 5
Dependent Claim
26 words
The apparatus of claim 1 wherein the coefficient of thermal expansion of the tube and the coefficient of thermal expansion of the fiber are substantially equal.
Claim 6
Dependent Claim
26 words
The apparatus of claim 2 wherein the coefficient of thermal expansion of the tube and the coefficient of thermal expansion of the fiber are substantially equal.
Claim 7
Dependent Claim
26 words
The apparatus of claim 3 wherein the coefficient of thermal expansion of the tube and the coefficient of thermal expansion of the fiber are substantially equal.
Claim 8
Dependent Claim
10 words
The apparatus of claim 1 wherein the tube is quartz.
Claim 9
Dependent Claim
10 words
The apparatus of claim 2 wherein the tube is quartz.
Claim 10
Dependent Claim
10 words
The apparatus of claim 3 wherein the tube is quartz.
Claim 11
Dependent Claim
10 words
The apparatus of claim 4 wherein the tube is quartz.
Claim 12
Dependent Claim
10 words
The apparatus of claim 5 wherein the tube is quartz.
Claim 13
Dependent Claim
10 words
The apparatus of claim 6 wherein the tube is quartz.
References Cited (Backward Citations)
US3582324A
Cited
US4119363A
Cited
US4144504A
Cited
GB1541495A
Cited
US4158477A
Cited
US4338577A
Cited
GB1585899A
Cited
US4360965A
Cited
US4456334A
Cited
US4482201A
Cited
US4432464A
Cited
US4430376A
Cited
GB2124402A
Cited
US4615031A
Cited
GB2125180A
Cited
US4591711A
Cited
GB2131971A
Cited
US4565558A
Cited
US4566892A
Cited
GB2150858A
Cited
EP0148012A2
Cited
US4687290A
Cited
DE3407820A1
Cited
EP0181532A1
Cited
DE3533920A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |