US4064211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining of passageways
Assignee: Insituform Netherlands BV
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Filing: 1975-11-05
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Granted: 1977-12-20
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Expires: 1995-11-05
Abstract
Abstract A method wherein a tubular liner is applied to the surface of a passageway such as a tunnel or pipeline bore. The liner may be in the form of a flattened tube of absorbent material such as felt or foam such is impregnated with synthetic resin. The liner is anchored at one end of the passageway and is fed into the passageway being turned inside out as it is so fed in. In order to eliminate friction, the liner, before being turned inside out, is supported buoyantly by liquid which serves to carry the liner.
Inventors
- 👤 Eric Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:17
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/26; B29C63/34; B29C63/36; B29C63/0065; B29C63/0069; B29C63/28; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1651
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
104 words
A method of lining a passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored fluid impermeable tubular membrane whereby the tubular membrane and the lining evert as they progress into the passageway, 2.
Claim 2
Independent Claim
104 words
A method of lining a passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored fluid impermeable tubular membrane whereby the tubular membrane and the lining evert as they progress into the passageway, 2.
Claim 3
Dependent Claim
83 words
causing the tubular membrane and the encased lining to move into the passageway by applying fluid pressure to the interior of the everted tubular membrane, and 3. buoyantly supporting the weight of the everted tubular membrane and the encased impregnated lining by filling the everted tubular membrane with a liquid whose specific gravity is so related to the weight of the tubular membrane and the encased impregnated lining that the uneverted tubular membrane and the encased impregnated lining are suspended in a buoyant
Claim 4
Dependent Claim
83 words
causing the tubular membrane and the encased lining to move into the passageway by applying fluid pressure to the interior of the everted tubular membrane, and 3. buoyantly supporting the weight of the everted tubular membrane and the encased impregnated lining by filling the everted tubular membrane with a liquid whose specific gravity is so related to the weight of the tubular membrane and the encased impregnated lining that the uneverted tubular membrane and the encased impregnated lining are suspended in a buoyant
Claim 5
Dependent Claim
109 words
position submerged in the liquid. 2. A method of lining a passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored fluid impermeable tubular membrane whereby the tubular membrane and the lining evert as they progress into the passageway,
Claim 6
Dependent Claim
109 words
position submerged in the liquid. 2. A method of lining a passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored fluid impermeable tubular membrane whereby the tubular membrane and the lining evert as they progress into the passageway,
Claim 7
Dependent Claim
114 words
causing the tubular membrane and the encased lining to move into the passageway by applying fluid pressure to the interior of the everted tubular membrane, 3. causing the uneverted tubular membrane and the encased lining to be buoyantly supported by a liquid within the everted tube as the uneverted tubular membrane and the encased lining progress along the passageway by partially filling the everted tubular membrane with the liquid, the weight of the uneverted tubular membrane and the encased resin impregnated lining being such as to cause the uneverted tubular membrane to float on the liquid, and 4. filling the remainder of the interior of the everted tubular membrane with a pressurized gaseous medium.
Claim 8
Dependent Claim
114 words
causing the tubular membrane and the encased lining to move into the passageway by applying fluid pressure to the interior of the everted tubular membrane, 3. causing the uneverted tubular membrane and the encased lining to be buoyantly supported by a liquid within the everted tube as the uneverted tubular membrane and the encased lining progress along the passageway by partially filling the everted tubular membrane with the liquid, the weight of the uneverted tubular membrane and the encased resin impregnated lining being such as to cause the uneverted tubular membrane to float on the liquid, and 4. filling the remainder of the interior of the everted tubular membrane with a pressurized gaseous medium.
Claim 9
Independent Claim
106 words
A method of lining an underground passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored end of the fluid impermeable tubular membrane whereby the tube and the lining evert as they progress into the passageway,
Claim 10
Independent Claim
106 words
A method of lining an underground passageway with a rigid protective lining by inserting into the passageway from one end thereof a fluid impermeable evertible tubular membrane having encased therein an evertible tubular lining of resin absorbent material impregnated with a polymerizable synthetic resin, the method comprising the steps of 1. anchoring the evertible tubular membrane and the evertible lining at one end of the passageway in a manner permitting the uneverted tubular membrane with its encased lining to pass into the passageway through the anchored end of the fluid impermeable tubular membrane whereby the tube and the lining evert as they progress into the passageway,
Claim 11
Dependent Claim
138 words
continuously feeding the inverted tubular membrane and encased lining from ground level to said one end of the passageway to enable the tubular membrane and encased lining progressively to evert into and along the passageway by supplying liquid from ground level to fill the everted tubular membrane and to surround the uneverted portion of the tubular membrane extending from ground level to said one end of the passageway whereby the liquid forces the tubular membrane and encased lining to move along and evert in the passageway thereby lining same, the specific gravity of the liquid being chosen in relation to the weight of the uneverted tubular membrane and the impregnated lining so that the uneverted tubular membrane and the encased impregnated lining are supported in a buoyant position submerged in the liquid as they pass along the passageway.
Claim 12
Dependent Claim
138 words
continuously feeding the inverted tubular membrane and encased lining from ground level to said one end of the passageway to enable the tubular membrane and encased lining progressively to evert into and along the passageway by supplying liquid from ground level to fill the everted tubular membrane and to surround the uneverted portion of the tubular membrane extending from ground level to said one end of the passageway whereby the liquid forces the tubular membrane and encased lining to move along and evert in the passageway thereby lining same, the specific gravity of the liquid being chosen in relation to the weight of the uneverted tubular membrane and the impregnated lining so that the uneverted tubular membrane and the encased impregnated lining are supported in a buoyant position submerged in the liquid as they pass along the passageway.
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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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |