Patent US4773450A successfully refreshed from Google Patents.
US4773450A
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Interlining of fluid transport pipelines, pipes, and the like
Assignee: PRO-TECH ADVISORY SERVICES Ltd
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Filing: 1984-10-01
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Granted: 1988-09-27
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Expires: 2004-10-01
Abstract
Abstract Pipes or pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and the like are interlined with flexible composite tubular lining material. The lining material is matched to the crosswise dimension of the pipe and is adapted to be insertable thereinto and to fit snugly against the inner wall thereof. The lining material comprises a flexible matrix member having a netlike open-meshed configuration, thereby being adapted to receive into its interstices foamable material adapted to expand outwardly upon foaming, into and about irregularities in the wall surface, and to solidify there. The matrix member preferably is extensible lengthwise, and thus reducible in size crosswise, when under axial tension. When released from axial tension, the matrix member recovers to its previous dimensions, except as it may be confined, as against an inside wall of a pipe or pipeline. An inner skin layer contiguous with the matrix member, and (at the user's option) an outer skin layer, complete the lining material. The lining may be applied either before a pipe or pipeline is placed in service or afterward--and either in situ or whenever a length of pipe is removed for maintenance or repair.
Inventors
- 👤 Robert K. Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1651; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/03; B29C48/09; B29C48/15; B29C48/151; B29C48/152; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/355; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/908; B29C48/911; B29C48/9115; B29C48/912; B29C48/919; B29C63/00; B29C63/26; B29C63/34; B29C63/36; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92704; B29C48/10; Y; Y10; Y10S; Y10S138/00; Y10S138/09; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
75 words
Method of lining the wall of a water, sewage, slurry, liquid or gaseous hydrocarbon, or like material-transporting pipe, above or below ground, comprising the steps of forming composite lining material having an inner skin layer and a foamable contiguous layer, including supporting the aforesaid layers upon a flexible open-mesh matrix member in tubular form , and placing such composite lining adjacent such wall thereof, including foaming the foamable layer outward into contact with the wall.
Claim 2
Dependent Claim
75 words
Method of lining the wall of a water, sewage, slurry, liquid or gaseous hydrocarbon, or like material-transporting pipe, above or below ground, comprising the steps of forming composite lining material having an inner skin layer and a foamable contiguous layer, including supporting the aforesaid layers upon a flexible open-mesh matrix member in tubular form , and placing such composite lining adjacent such wall thereof, including foaming the foamable layer outward into contact with the wall.
Claim 3
Dependent Claim
40 words
Pipe lining method according to claim 1, including placing foamable material within the interstices of the meshed matrix member, and juxtaposing the inner skin layer adherently to the inner tubular surface of the matrix member, before insertion into the pipe.
Claim 4
Dependent Claim
21 words
Pipe lining method according to claim 2, including forming the matrix member and the inner skin layer substantially simultaneously by extrusion.
Claim 5
Dependent Claim
34 words
Pipe lining method according to claim 2, including juxtaposing an outer skin layer adherently onto the outer tubular surface of the matrix member, with the foamable material in the interstices of the matrix member.
Claim 6
Dependent Claim
42 words
Pipe lining method according to claim 1, including deferring placing foamable material within the interstices of the meshed matrix member, and juxtaposing the inner skin layer adherently to the inner tubular surface of the matrix member, until after insertion into the pipe.
Claim 7
Dependent Claim
24 words
Pipe lining method according to claim 5, including interposing an outer skin layer between the matrix member and the inside wall of the pipe.
Claim 8
Dependent Claim
87 words
Lining a pipe, comprising the steps of providing a netlike fused strand open-meshed matrix member in tubular form of similar size crosswise and flexible both lengthwise and crosswise, applying axial tension to the matrix member, thereby temporarily increasing its length and reducing its crosswise dimensions sufficiently to be insertable into the pipe, inserting the matrix member into the pipe under such tension, and then releasing the tension on the matrix member, whereupon it expands toward its previous crosswise dimensions and against the inside wall of the pipe.
Claim 9
Dependent Claim
87 words
Lining a pipe, comprising the steps of providing a netlike fused strand open-meshed matrix member in tubular form of similar size crosswise and flexible both lengthwise and crosswise, applying axial tension to the matrix member, thereby temporarily increasing its length and reducing its crosswise dimensions sufficiently to be insertable into the pipe, inserting the matrix member into the pipe under such tension, and then releasing the tension on the matrix member, whereupon it expands toward its previous crosswise dimensions and against the inside wall of the pipe.
Claim 10
Dependent Claim
38 words
Pipe lining method according to claim 7, wherein the interstices of the matrix member have had foamable material applied therein, and including the step of foaming the material therein and outwardly against the inside wall of the pipe.
Claim 11
Dependent Claim
23 words
Pipe lining method according to claim 8, including juxtaposing an inner skin layer adherently onto the inner tubular surface of the matrix member.
Claim 12
Dependent Claim
28 words
Pipe lining method according to claim 9, wherein the foamable material and the inner skin layer are applied to the matrix member after inserting it into the pipe.
Claim 13
Dependent Claim
18 words
Pipe lining method according to claim 10, wherein the pipe is so lined before being placed into use.
Claim 14
Dependent Claim
28 words
Pipe lining method according to claim 9, wherein the foamable material and the inner skin layer are applied to the matrix member before inserting it into the pipe.
Claim 15
Dependent Claim
48 words
Pipe lining method according to claim 12, wherein the pipe is used for transport of fluid or fluidized material therethrough before being lined with the composite tubular material and then is so lined and the foamable layer thereof so foamed and solidified in place against the pipe wall.
Claim 16
Dependent Claim
117 words
Method of lining a pipeline or similar circumferential passageway-defining structure, comprising extruding a flexible tubular open diamond-meshed meshed matrix member matched to the pipe in crosswise dimensions, the matrix member being extensible lengthwise and thus reducible in size crosswise, applying foamable material to the interstices of the meshed matrix member, adhering an inner skin layer of polymerized material against the inwardly directed surface thereof, tensioning the matrix member to increased length and decreased cross section, pulling the resulting composite tubing into and along the inside wall of such structure, then releasing the tension and thereby enabling the matrix member to expand into contact with the inside wall of the structure, and foaming the foamable layer in place.
Claim 17
Dependent Claim
117 words
Method of lining a pipeline or similar circumferential passageway-defining structure, comprising extruding a flexible tubular open diamond-meshed meshed matrix member matched to the pipe in crosswise dimensions, the matrix member being extensible lengthwise and thus reducible in size crosswise, applying foamable material to the interstices of the meshed matrix member, adhering an inner skin layer of polymerized material against the inwardly directed surface thereof, tensioning the matrix member to increased length and decreased cross section, pulling the resulting composite tubing into and along the inside wall of such structure, then releasing the tension and thereby enabling the matrix member to expand into contact with the inside wall of the structure, and foaming the foamable layer in place.
Claim 18
Dependent Claim
30 words
Passageway lining method according to claim 14, wherein the foamable layer expands to fill the interstices of the matrix member and expands outward against the inside wall and then solidifies.
Claim 19
Dependent Claim
14 words
Pipeline or similar circumferential passageway-defining structure lined according to the method of claim 14.
Claim 20
Dependent Claim
86 words
In a method of lining and thereby maintaining a water, sewage, slurry, liquid or gaseous hydrocarbon, or like material-transporting pipe with a tubular composite lining material, comprising the steps of applying foamable material to a temporarily extensible open-meshed tubular matrix member, and lining the matrix member inner surface with a skin layer adherent thereto, thereby forming tubular composite lining material, and then foaming the foamable layer and thereby enlarging the adjacent surface of the tubular composite lining material toward the inside wall of a surrounding pipe.
Claim 21
Dependent Claim
86 words
In a method of lining and thereby maintaining a water, sewage, slurry, liquid or gaseous hydrocarbon, or like material-transporting pipe with a tubular composite lining material, comprising the steps of applying foamable material to a temporarily extensible open-meshed tubular matrix member, and lining the matrix member inner surface with a skin layer adherent thereto, thereby forming tubular composite lining material, and then foaming the foamable layer and thereby enlarging the adjacent surface of the tubular composite lining material toward the inside wall of a surrounding pipe.
Claim 22
Dependent Claim
40 words
In the pipe lining method according to claim 17, wherein the composite lining material is formed outside whatever is to be lined thereby, and including the further steps of inserting the lining material thereinto and subsequently foaming the foamable material.
Claim 23
Dependent Claim
55 words
In the pipe lining method according to claim 17, wherein the composite lining material is formed inside whatever is to be lined thereby, and including the steps of inserting the matrix member thereinto, then applying the foamable material to the matrix member before lining it with the skin layer, and later foaming the foamable material.
Claim 24
Dependent Claim
45 words
In the pipe lining method according to claim 17, including tensioning the matrix member lengthwise, thereby reducing it in diameter while inserting it into whatever is to be lined, and releasing the applied tension when the matrix member is at the desired lining location therein.
Claim 25
Dependent Claim
102 words
Pipe lining method comprising the following steps: forming composite lining material having as components an open-mesh matrix member, a skin layer, and a layer of foamable material at least partly filling the open-mesh interstices, about the cross-sectional shape and size of a pipe to be lined therewith, including locating such skin layer contiguous both with the radially inward surface of the matrix member and with foamable material in the interstices thereof, and placing composite lining material inside a pipe to be lined thereby and adjacent the inside wall thereof, including foaming the foamable material outward and into contact with the pipe wall.
Claim 26
Dependent Claim
102 words
Pipe lining method comprising the following steps: forming composite lining material having as components an open-mesh matrix member, a skin layer, and a layer of foamable material at least partly filling the open-mesh interstices, about the cross-sectional shape and size of a pipe to be lined therewith, including locating such skin layer contiguous both with the radially inward surface of the matrix member and with foamable material in the interstices thereof, and placing composite lining material inside a pipe to be lined thereby and adjacent the inside wall thereof, including foaming the foamable material outward and into contact with the pipe wall.
Claim 27
Dependent Claim
40 words
Pipe lining method according to claim 21, including forming the composite lining material outside the pipe to be so lined, extending the lining material, thereby reducing its cross-section somewhat, and pulling it into the pipe before performing the foaming step.
Claim 28
Dependent Claim
47 words
Pipe lining method according to claim 22, including the steps of extruding such skin layer, applying such foamable material to the skin layer, and then juxtaposing the skin layer with the foamable material thereon adherently to such matrix member, thereby forcing foamable material into the interstices thereof.
Claim 29
Dependent Claim
26 words
Pipe lining method according to claim 21, including forming the composite lining material inside the pipe to be so lined, and performing the foaming step thereafter.
Claim 30
Dependent Claim
48 words
Pipe lining method according to claim 23, including placing such matrix member against the inside wall of the pipe, applying such foamable material into the open-mesh interstices thereof, and then adhering a skin layer to the radially inward surface of the matrix material before performing the foaming step.
Claim 31
Dependent Claim
50 words
Pipe lining method according to claim 25, including forming both the matrix member and the skin layer from strips of the respective component materials by winding the same helically adjacent the inside wall of the pipe to be lined thereby to form a tubular structure slightly smaller than such pipe.
References Cited (Backward Citations)
US4368091A
Cited
US4386628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |