EP0098547A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements relating to the lining of passageways
Assignee: Trio Engineering Ltd
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Filing: 1983-07-01
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Granted: —
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Expires: 2003-07-01
Abstract
Abstract The specification pertains to the lining on site of pipelines and passageways of long length by a lining tube formed from sheet material (11) formed into a pipe (12) and welded, deflecting the tube so that it is deflected into smaller diametral size, holding the tube in the deflected condition, feeding the deflected and held tube into the passageway to be lined, and releasing the hold on the tube so that it deflects or is deflected back to its original form and lines the pipeline or passageway.
Inventors
- 👤 Eric Wood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 02:07
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/08; B29C53/086; B29C53/36; B29C53/38; B29C53/48; B29C63/00; B29C63/26; B29C63/34; B29C63/343; B29C65/00; B29C65/76; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5223; B29C66/53; B29C66/534; B29C66/5344; B29C67/00; B29C67/0014; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1652
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A method of lining passageways comprising forming a tubular liner of plastics at the site of the passageway to be lined, by forming plastics sheet material into a pipe on site by welding, fusing or the like, such liner being of such a resiliency that it can be flexed but will return or tend to return to the unflexed condition when released, deflecting the tube to a condition in which the largest diametral dimension of the deflected tube is less than the outer diameter of the undeflected tube, releasably holding the tube, whilst in deflected condition, inserting the held, deflecting tube into the passageway to be lined, and releasing the hold on the tube when the tube is in the passageway and either allowing or causing the tube to return to undeflected condition.
Claim 2
Independent Claim
133 words
A method of lining passageways comprising forming a tubular liner of plastics at the site of the passageway to be lined, by forming plastics sheet material into a pipe on site by welding, fusing or the like, such liner being of such a resiliency that it can be flexed but will return or tend to return to the unflexed condition when released, deflecting the tube to a condition in which the largest diametral dimension of the deflected tube is less than the outer diameter of the undeflected tube, releasably holding the tube, whilst in deflected condition, inserting the held, deflecting tube into the passageway to be lined, and releasing the hold on the tube when the tube is in the passageway and either allowing or causing the tube to return to undeflected condition.
Claim 3
Dependent Claim
25 words
A method according to Claim 1 wherein, the pipe forming, deflecting, holding and inserting the tube in the passageway is effected in a continuous operation.
Claim 4
Dependent Claim
44 words
A method according to Claim 1 or 2 wherein, after the tube has been placed in the passageway and the holding means released, the interior of the tube is pressurised or has a deflecting member therein to redeflect the tube to a circular form.
Claim 5
Independent Claim
25 words
A method according to any of the preceding Claims wherein, the tube is deflected to a horse shoe or clover leaf shape in cross section.
Claim 6
Independent Claim
30 words
A method according to any of Claims 1 to 4 wherein, the holding means is an internal negative pressure, a tape or sleeve, or a combination of any such means.
Claim 7
Dependent Claim
36 words
A method according to Claim 5 wherein, a sleeve plastics foil is the holding means and it has a seam of weakening which can be ruptured, such as for example by igniting the fuse embodied therein.
Claim 8
Dependent Claim
26 words
A method according to Claim 4 wherein, the holding means is a negative internal pressure which is released when the pipe is placed in the passageway.
Claim 9
Independent Claim
29 words
A method according to any preceding Claim wherein, the method is repeated producing pipe liners of progressively smaller dimension, in order to form a multi-layer liner in the passageway.
Claim 10
Dependent Claim
14 words
A passageway lined by the method according to any one of the preceding Claims.
References Cited (Backward Citations)
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