Patent US1300898A successfully refreshed from Google Patents.
EP0377486A2
Expired / Lapsed
EP
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Lining pipes
Assignee: Subterra Ltd
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Filing: 1990-01-02
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Granted: —
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Expires: 2010-01-02
Abstract
Abstract A pipe is lined by inserting a circular liner which is both reduced in size and deformed into a non-circular shape with a maximum dimension less than the diameter of its circle. After insertion the liner is reverted (by pressure and/or heat, for example) towards its original dimensions. The original size of the liner is preferably greater than that of the pipe.
Inventors
- 👤 Raymond Lippiatt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 10:27
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/38; B29C63/46; B29C63/26; B29C63/34; B29C63/343; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1652; F16L55/1654; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A method of lining a pipe comprising reducing a circular liner tube in cross-section, deforming the reduced liner into a non-circular shape, inserting the reduced and deformed liner into the pipe to be lined reverting the liner towards its original circular shape and then reverting the liner towards its original cross-section.
Claim 2
Independent Claim
51 words
A method of lining a pipe comprising reducing a circular liner tube in cross-section, deforming the reduced liner into a non-circular shape, inserting the reduced and deformed liner into the pipe to be lined reverting the liner towards its original circular shape and then reverting the liner towards its original cross-section.
Claim 3
Dependent Claim
18 words
The method of Claim 1 wherein the or each reversion step includes increasing the pressure within the liner.
Claim 4
Dependent Claim
18 words
The method of Claim 1 or Claim 2 wherein the or each reversion step includes heating the liner.
Claim 5
Dependent Claim
21 words
The method of Claim 2 or Claim 3 wherein the or each reversion step includes filling the liner with a liquid.
Claim 6
Dependent Claim
9 words
A pipe lined by the method of Claim 1.
References Cited (Backward Citations)
No citation records indexed.
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