Patent US5144953A successfully refreshed from Google Patents.
US5551484A
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US
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Pipe liner and monitoring system
Assignee: Smart Pipe Co Inc
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Filing: 1994-08-19
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Granted: 1996-09-03
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Expires: 2014-08-19
Abstract
Abstract A multi-layered liner for lining a pipeline which has an external jacket, an interior liner, a woven intermediate layer between the external jacket and the interior liner. At least one optical fiber is in the woven intermediate liner for purposes of monitoring stress or for communication, and a capacitance leak detection circuit is also in the multi-layered liner for the purpose of detecting leaks in the multi-layered liner. Also included is the method of monitoring a pipeline for stress or leakage by use of a stress detector connected to an optic fiber in a multi-layered liner installed in the pipeline and a leak detector connected to a capacitance circuit in a multi-layered liner installed in a pipeline.
Inventors
- 👤 Kenneth R. Charboneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4439; G02B6/4469; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1656; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/165; G01M5/00; G01M5/0025; G01M5/0033; G01M5/0091; G01L; G01L1/00; G01L1/24; G01L1/242; Y; Y10; Y10S; Y10S138/00; Y10S138/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A multi-layered liner for lining and monitoring a pipeline comprising, an external jacket, an interior liner, a woven intermediate layer interposed between the external jacket and interior liner and at least one optical fiber running the length of the multi-layered liner to monitor stress in the pipeline, said optical fiber being woven into the woven intermediate layer.
Claim 2
Dependent Claim
57 words
A multi-layered liner for lining and monitoring a pipeline comprising, an external jacket, an interior liner, a woven intermediate layer interposed between the external jacket and interior liner and at least one optical fiber running the length of the multi-layered liner to monitor stress in the pipeline, said optical fiber being woven into the woven intermediate layer.
Claim 3
Dependent Claim
19 words
The multi-layered liner of claim 1, wherein the external jacket and interior liner are each made of thermoplastic material.
Claim 4
Dependent Claim
36 words
The multi-layered liner of claim 1, wherein the woven intermediate layer has at least two sets of strands including a first set woven from right to left and a second set woven from left to right.
Claim 5
Dependent Claim
27 words
The multi-layered liner of claim 3, wherein the optical fiber is woven into the woven intermediate layer directly adjacent to a strand of the woven intermediate layer.
Claim 6
Dependent Claim
34 words
The multi-layered liner of claim 4, further comprising a reference optical fiber on a surface of the woven intermediate layer running adjacent and parallel to the optical fiber woven into the woven intermediate layer.
Claim 7
Dependent Claim
15 words
The multi-layered liner of claim 1, wherein the woven intermediate layer is a non-conductive material.
Claim 8
Dependent Claim
19 words
The multi-layered liner of claim 6, wherein the external jacket and interior liner are each made of thermoplastic material.
Claim 9
Dependent Claim
45 words
The multi-layered liner of claim 6, further comprising a conductive layer interposed between the exterior jacket and the non-conductive woven intermediate layer and a conductor running the length of the multi-layered liner and radially separated from the conductive layer by the nonconductive woven intermediate layer.
Claim 10
Dependent Claim
31 words
The multi-layered liner of claim 6, further comprising at least two conductive elements running the length of the multi-layered liner and separated from each other by the nonconductive woven intermediate layer.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |