US4622196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining of pipelines and passageways
Assignee: Insituform Netherlands BV
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Filing: 1985-01-07
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Granted: 1986-11-11
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Expires: 2005-01-07
Abstract
Abstract The invention provides that in inserting a resin impregnated liner into a pipeline or passageway and shaping same to the passageway surface, followed by curing of the resin to form a rigid lining inside the pipeline or passageway, there are placed in the passageway reinforcing circumferential coils or members which bond to the liner and provide extra resistance to compressive hoop stress.
Inventors
- 👤 Eric Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:55
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/0017; B29C63/0021; B29C63/26; B29C63/34; F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1027
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
158 words
A method of lining a pipeline or passageway comprising the following steps: A. inserting into the pipeline or passageway at spaced intervals one or more assemblies, each assembly comprising (i) a band of resin absorbent material impregnated with a curable synthetic resin and (ii) a ring of reinforcing material of narrower width than the band of absorbent material and located in relation thereto so that the absorbent material overlaps the edges of the band; B. inserting into the pipeline or passageway before the resin impregnating said bands of material has cured, a resin impregnated tubular lining presenting a face of uncured resin to said assemblies so that the uncured resin face of the liner comes into resin contact with the overlapping portions of the bands of material; and C. curing the resin of the bands of material and the liner whereby the reinforcing rings become embedded in cured resin and provide compressive hoop stress reinforcement for the liner.
Claim 2
Independent Claim
158 words
A method of lining a pipeline or passageway comprising the following steps: A. inserting into the pipeline or passageway at spaced intervals one or more assemblies, each assembly comprising (i) a band of resin absorbent material impregnated with a curable synthetic resin and (ii) a ring of reinforcing material of narrower width than the band of absorbent material and located in relation thereto so that the absorbent material overlaps the edges of the band; B. inserting into the pipeline or passageway before the resin impregnating said bands of material has cured, a resin impregnated tubular lining presenting a face of uncured resin to said assemblies so that the uncured resin face of the liner comes into resin contact with the overlapping portions of the bands of material; and C. curing the resin of the bands of material and the liner whereby the reinforcing rings become embedded in cured resin and provide compressive hoop stress reinforcement for the liner.
Claim 3
Dependent Claim
102 words
A method according to claim 1, wherein the assemblies inserted in Step A comprise strengthening bands of a rigid supporting material each encased in jackets of resin impregnated material; and wherein the resin impregnated tubular lining is inserted as in Step B while the resin impregnating the said jackets is still wet, and wherein the impregnated fibrous layer of said resin impregnated tubular lining is brought into face to face contact with the said impregnated jacket so that the resin of the liner and the respective jackets can fuse, and the jacket and hence the bands will bond to the cured lining.
Claim 4
Dependent Claim
49 words
A method according to claim 1 wherein the lining comprises a flexible tube of resin absorbent material which is surrounded by a membrane, and the absorbent layer is impregnated with resin, and the tubular lining is inverted into the pipeline or passageway after the placement of the said assemblies.
Claim 5
Dependent Claim
49 words
A method according to claim 2, wherein the lining comprises a flexible tube of resin absorbent material which is surrounded by a membrane, and the absorbent layer is impregnated with resin, and the tubular lining is inverted into the pipeline or passageway after the placement of the said assemblies.
Claim 6
Dependent Claim
33 words
A method according to claim 1, wherein the resin is cured by the application of heat or in the alternative where a light curing resin is used, by the application of light radiation.
Claim 7
Dependent Claim
33 words
A method according to claim 2, wherein the resin is cured by the application of heat or in the alternative where a light curing resin is used, by the application of light radiation.
Claim 8
Dependent Claim
33 words
A method according to claim 3, wherein the resin is cured by the application of heat or in the alternative where a light curing resin is used, by the application of light radiation.
Claim 9
Dependent Claim
33 words
A method according to claim 4, wherein the resin is cured by the application of heat or in the alternative where a light curing resin is used, by the application of light radiation.
Claim 10
Dependent Claim
30 words
A method according to claim 1, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 11
Dependent Claim
30 words
A method according to claim 2, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 12
Dependent Claim
30 words
A method according to claim 3, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 13
Dependent Claim
30 words
A method according to claim 4, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 14
Dependent Claim
30 words
A method according to claim 5, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 15
Dependent Claim
30 words
A method according to claim 6, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 16
Dependent Claim
30 words
A method according to claim 7, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
Claim 17
Dependent Claim
30 words
A method according to claim 8, wherein the said bands are of steel and have a modulus of elasticity of the order of 300 times that of the cured resin.
References Cited (Backward Citations)
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Cited
GB1449455A
Cited
US4064211A
Cited
US4368091A
Cited
US4432824A
Cited
US4434115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |