US4135958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lining a passageway with a resin absorbent tube
Assignee: Insituform Netherlands BV
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Filing: 1977-12-29
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Granted: 1979-01-23
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Expires: 1997-12-29
Abstract
Abstract A lining comprising a resin absorbent tube having on the outside a fluid impermeable membrane everted into the passageway to line same using fluid pressure. The resin absorbent material is soaked in resin by trapping a quantity of resin in the lining before it everts in the passageway, and the resin is cured after the lining is everted into the passageway surface, preferably by a curing means following the everting lining along the inside of the passageway.
Inventors
- 👤 Eric Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:48
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/26; B29C63/34; B29C63/36; B29C63/0017; B29C63/0021; B29C63/0065; B29C63/0069; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1651; Y; Y10; Y10S; Y10S118/00; Y10S118/10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/17; Y10T156/1788; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/53; Y10T29/53652; Y10T29/53657
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A method of forming a tubular resin impregnated lining in a passageway, comprising the steps of (a) causing a tube of resin absorbent material to evert into the passageway by applying fluid pressure to the interior of the everted tube to force the uneverted portion of the tube to move into the passageway through the everted portion of the tube, (b) causing a reservoir of resin to be located in the uneverted portion of the tube which is just behind the portion of the tube that is everting into the passageway whereby the resin absorbent material is soaked by the resin in the reservoir just before that material everts, and (c) supporting the uneverted tube at the location of the reservoir of resin by means that move along the passageway as the tube everts.
Claim 2
Independent Claim
134 words
A method of forming a tubular resin impregnated lining in a passageway, comprising the steps of (a) causing a tube of resin absorbent material to evert into the passageway by applying fluid pressure to the interior of the everted tube to force the uneverted portion of the tube to move into the passageway through the everted portion of the tube, (b) causing a reservoir of resin to be located in the uneverted portion of the tube which is just behind the portion of the tube that is everting into the passageway whereby the resin absorbent material is soaked by the resin in the reservoir just before that material everts, and (c) supporting the uneverted tube at the location of the reservoir of resin by means that move along the passageway as the tube everts.
Claim 3
Dependent Claim
45 words
The method according to claim 1, further comprising the step of (d) disposing means inside the everted tube which moves along the passageway as the tube everts and causes the resin in the absorbent material to cure and form a rigid lining in the passageway.
Claim 4
Dependent Claim
41 words
The method according to claim 1, further comprising the step of (d) disposing a resin containing tank in the passageway from which resin is added to the reservoir of resin in the uneverted tube as that tube everts into the passageway.
Claim 5
Dependent Claim
56 words
The method according to claim 1, wherein in step (c) a balloon or gas filled bag is placed within the everted tube to support the uneverted tube at the location of the resin reservoir and the balloon or gas filled bag rolls along the inside of the everted tube as that tube everts into the passageway.
Claim 6
Dependent Claim
39 words
The method according to claim 1, further including the step of (d) causing the uneverted tube to be pinched just before the tube everts whereby the resin absorbed from the reservoir is evenly spread through the resin absorbent material.
References Cited (Backward Citations)
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US3474755A
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |