Patent US4640313A successfully refreshed from Google Patents.
US4640313A
Expired / Lapsed
US
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Interlining of pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and the like
Assignee: Individual
•
Filing: 1983-12-19
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Granted: 1987-02-03
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Expires: 2003-12-19
Abstract
Abstract Pipelines for transporting sewage, water, slurries, liquid and gaseous hydrocarbons, and like materials are interlined with a composite tubular lining having an inner skin layer and a foamed layer contiguous with the inner skin layer. The foamed layer is either contiguous also, along its opposite surface, with the inner wall of the pipe or may be spaced therefrom by an outer skin layer of the composite lining. The lining may be applied either before the pipeline is placed into service or afterward, whether in situ or removed for maintenance or repair. For application in situ the lining is preferably more flexible than will suffice for insertion into new pipes. The lining itself is formed by extruding polymeric tubing for the inner layer and stabilizing it dimensionally, somewhat smaller than the pipe to be lined, then applying contiguously to the layer so formed a layer of foamable polymeric material, and optionally applying to the outer surface of the foamable layer a dimensionally expansible outer skin layer. The lining is inserted into the pipe to be lined, juxtaposed circumferentially to or near the inner wall of the pipe, then the foamable layer is foamed to expand the lining against the pipe wall, thereby lining the pipe.
Inventors
- 👤 Robert K. Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:37
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; B29C48/91; B29C48/911; B29C48/9115; B29C48/912; B29C48/919; B29C63/00; B29C63/26; B29C63/34; B29C63/36; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/9258; B29C2948/92704; B29C48/0018; B29C48/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
43 words
In preparing for lining a pipe with composite tubular materials fitting thereinto and having an inner skin layer and contiguous expansible layer, the improvement comprising extending the skin layer biaxially at least about 2X before juxtaposing the expansible layer into lateral contiguity therewith.
Claim 2
Dependent Claim
43 words
In preparing for lining a pipe with composite tubular materials fitting thereinto and having an inner skin layer and contiguous expansible layer, the improvement comprising extending the skin layer biaxially at least about 2X before juxtaposing the expansible layer into lateral contiguity therewith.
Claim 3
Dependent Claim
20 words
Pipe lining method according to claim 1, wherein the two layers are so juxtaposed before being inserted into the pipe.
Claim 4
Dependent Claim
25 words
Pipe lining method according to claim 1, wherein an outer skin layer is juxtaposed into lateral contiguity with the opposite side of the expansible layer.
Claim 5
Dependent Claim
19 words
Pipe lining method according to claim 3, wherein the outer skin layer is relaxed biaxially before being so juxtaposed.
Claim 6
Dependent Claim
71 words
Method of lining a pipeline or similarly circumferential passageway-defining structure, comprising extruding a tubing of polymeric material and dimensionally stabilizing the material, than juxtaposing into lateral contiguity with the outer surface thereof an outwardly expansible layer comprising polymerized material, inserting the composite tubing so formed into and along the inside wall of such structure and juxtaposing it thereto, then heating the tubing and thereby expanding the expansible layer against the wall.
Claim 7
Dependent Claim
71 words
Method of lining a pipeline or similarly circumferential passageway-defining structure, comprising extruding a tubing of polymeric material and dimensionally stabilizing the material, than juxtaposing into lateral contiguity with the outer surface thereof an outwardly expansible layer comprising polymerized material, inserting the composite tubing so formed into and along the inside wall of such structure and juxtaposing it thereto, then heating the tubing and thereby expanding the expansible layer against the wall.
Claim 8
Dependent Claim
17 words
Passageway lining method according to claim 5, wherein the expansible layer expands by foaming into cellular form.
Claim 9
Dependent Claim
17 words
Passageway lining method according to claim 6, wherein the expansible layer also solidifies in such expanded form.
Claim 10
Dependent Claim
14 words
Pipeline or similarly circumferential passageway-defining structure lined according to the method of claim 5.
Claim 11
Dependent Claim
63 words
Method of providing lining for a pipeline or similarly circumferential passageway structure, comprising juxtaposing adherently to the outer surface of a tubing of flexible polymeric material dimensionally stabilized by having been drawn biaxially at least about 2X a layer of foamable material expansible upon foaming and solidifiable in expanded form, and deferring expansion and solidification thereof until the lining is in place therewith.
Claim 12
Dependent Claim
63 words
Method of providing lining for a pipeline or similarly circumferential passageway structure, comprising juxtaposing adherently to the outer surface of a tubing of flexible polymeric material dimensionally stabilized by having been drawn biaxially at least about 2X a layer of foamable material expansible upon foaming and solidifiable in expanded form, and deferring expansion and solidification thereof until the lining is in place therewith.
Claim 13
Dependent Claim
20 words
Passageway lining method according to claim 9, wherein the extruded tubing is biaxially drawn about 4X in stabilizing it dimensionally.
Claim 14
Dependent Claim
40 words
Passageway lining method according to claim 10, including extruding another tubing of polymeric material, heat relaxing it to a smaller circumference approximating the outer circumference of the expansible layer, and adhering it to the outside surface of the expansible layer.
Claim 15
Dependent Claim
48 words
Passageway lining method according to claim 9, including inserting the lining into a passageway structure, juxtaposing the lining to the inside wall of the passageway structure, and heating the lining in place, whereupon the foamable material foams and, in doing so, expands until constrained by the inside wall.
Claim 16
Dependent Claim
19 words
Passageway lining method according to claim 12, including thereafter cooling the lining in place, whereupon the foamable material rigidifies.
Claim 17
Dependent Claim
12 words
Pipeline or similar structure lined according to the method of claim 9.
Claim 18
Dependent Claim
81 words
Method of providing lining for a pipeline or similarly circumferential structure, comprising forming a tubing of flexible polymeric material, biaxially drawing the tubing at least about 2X to increased size, circumferentially somewhat less than the size of the structure to be lined thereby, juxtaposing adherently to the outer surface of the tubing a foamable layer of thermoplastic material adapted to expand upon foaming and to solidify in expanded form when the lining is in place within the structure to be lined.
Claim 19
Dependent Claim
81 words
Method of providing lining for a pipeline or similarly circumferential structure, comprising forming a tubing of flexible polymeric material, biaxially drawing the tubing at least about 2X to increased size, circumferentially somewhat less than the size of the structure to be lined thereby, juxtaposing adherently to the outer surface of the tubing a foamable layer of thermoplastic material adapted to expand upon foaming and to solidify in expanded form when the lining is in place within the structure to be lined.
Claim 20
Dependent Claim
39 words
Pipeline lining method according to claim 15, including foaming the foamable material and thereby expanding its outermost circumference until it is constrained by the inside wall of the structure to be lined and solidifying the foamed material in place.
Claim 21
Dependent Claim
12 words
Pipeline or similar structure lined according to the method of claim 16.
Claim 22
Dependent Claim
64 words
Pipeline lining method according to claim 15, including forming another tubing of flexible polymeric material, larger in circumference than the layer of foamable material, heat-relaxing the second tubing and thereby diminishing its circumference to approximate that of the outer surface of the foam layer, and then juxtaposing the second tubing adherently onto the outside of the layer of foamable material on the first tubing.
Claim 23
Dependent Claim
37 words
Pipeline lining method according to claim 18, including foaming the foamable material and thereby expanding the outermost circumference until it is constrained by the inside wall of the circumferential structure and solidifying the foamed material in place.
Claim 24
Dependent Claim
12 words
Pipeline or similar structure lined according to the method of claim 19.
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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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |