US4980116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lining of pipelines and passageways
Assignee: Insituform Netherlands BV
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Filing: 1989-02-10
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Granted: 1990-12-25
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Expires: 2009-02-10
Abstract
Abstract In order to line a pipeline or passageway active in conveying effluent without interrupting the flow of effluent therethrough, a first bypass conduit is passed through the section to be lined before the lining is inserted and the effluent is pumped therethrough, a second bypass conduit is passed through the lining after it has been inserted but before is has been fixed in position, the effluent is then pumped through that second conduit, the lining is fixed in position, normal effluent flow resumes, and the second conduit can be removed for future use.
Inventors
- 👤 F. Thomas Driver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:39
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/165; F16L55/1651; F16L55/1604
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
175 words
The method of lining a length of pipe active in conveying effluent by fixing the lining in place in the pipe which comprises: (a) placing a lining in said pipe along said length; (b) exerting fluid pressure inside said lining to press said lining against the inner surface of said pipe; (c) providing a conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said conduit and out of the open end thereof into said pipe downstream of said length; and (e) fixing said lining in place in said pipe against the inner surface of said pipe, in which step (a) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said conduit to the trailing end of said everting lining so that said open end of said conduit opens to the outside of said everted lining, said conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 2
Independent Claim
175 words
The method of lining a length of pipe active in conveying effluent by fixing the lining in place in the pipe which comprises: (a) placing a lining in said pipe along said length; (b) exerting fluid pressure inside said lining to press said lining against the inner surface of said pipe; (c) providing a conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said conduit and out of the open end thereof into said pipe downstream of said length; and (e) fixing said lining in place in said pipe against the inner surface of said pipe, in which step (a) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said conduit to the trailing end of said everting lining so that said open end of said conduit opens to the outside of said everted lining, said conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 3
Independent Claim
204 words
The method of lining a length of pipe active in conveying effluent by fixing the lining in place in the pipe which comprises: (a) providing a first conduit in said pipe along said length and causing said pipe effluent to flow therethrough into said pipe downstream of said length; (b) placing a lining in said pipe along said length and over said first conduit; (c) providing a second conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said second conduit and out of an open end thereof into said pipe downstream of said length; and (e) exerting fluid pressure inside said lining to press said lining against the inner surface of said pipe and fixing said lining in place in said pipe, in which step (b) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said second conduit to the trailing end of said everting lining so that said open end of said second conduit opens to the outside of said everted lining, said second conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 4
Independent Claim
204 words
The method of lining a length of pipe active in conveying effluent by fixing the lining in place in the pipe which comprises: (a) providing a first conduit in said pipe along said length and causing said pipe effluent to flow therethrough into said pipe downstream of said length; (b) placing a lining in said pipe along said length and over said first conduit; (c) providing a second conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said second conduit and out of an open end thereof into said pipe downstream of said length; and (e) exerting fluid pressure inside said lining to press said lining against the inner surface of said pipe and fixing said lining in place in said pipe, in which step (b) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said second conduit to the trailing end of said everting lining so that said open end of said second conduit opens to the outside of said everted lining, said second conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 5
Dependent Claim
28 words
In the method of either of claims 1 or 2, the step of removing said inside-the-lining conduit after said lining has been fixed in place in said pipe.
Claim 6
Dependent Claim
20 words
The method of claim 2, in which said first conduit is radially collapsible when pipe effluent is not flowing therethrough.
Claim 7
Dependent Claim
27 words
The method of claim 4, in which said second conduit is removed from inside said lining after said lining has been fixed in place in said pipe.
Claim 8
Dependent Claim
20 words
The method of claim 4, in which step (d) includes stopping said pipe effluent from flowing through said first conduit.
Claim 9
Dependent Claim
27 words
The method of claim 6, in which said second conduit is removed from inside said lining after said lining has been fixed in place in said pipe.
Claim 10
Independent Claim
25 words
The method of either of claims 1 or 2, in which said pipe effluent is caused to flow by pumping said effluent through said conduits.
Claim 11
Dependent Claim
23 words
The method of claim 8, in which said inside-the-lining conduit is removed after said lining has been fixed in place in said pipe.
Claim 12
Dependent Claim
19 words
The method of claim 2, in which step (d) includes stopping said effluent from flowing through said first conduit.
Claim 13
Dependent Claim
27 words
The method of claim 10, in which said second conduit is removed from inside said lining after said lining has been fixed in place in said pipe.
Claim 14
Dependent Claim
35 words
In the method of claim 8, obstructing normal flow of effluent at a point upstream of said length, said conduit or conduits being there operatively connected to said pipe via means for performing said pumping.
Claim 15
Dependent Claim
33 words
In the method of either of claims 1 or 2, obstructing normal flow of effluent at a point upstream of said length, said conduit or conduits being there operatively connected to said pipe.
Claim 16
Independent Claim
141 words
The method of lining a length of pipe active in conveying effluent which comprises: (a) placing a lining in said pipe along said length; (b) providing a conduit inside said lining along said length before said lining has been fixed in place; (c) causing said pipe effluent to flow through said conduit and out of the open end thereof into said pipe downstream of said length; and (d) fixing said lining in place in said pipe, in which step (a) comprises everting said lining into said pipe length, and step (b) comprises attaching the open end of said conduit to the trailing end of said everting lining so that said open end of said conduit opens to the outside of said everted lining, said conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 17
Independent Claim
141 words
The method of lining a length of pipe active in conveying effluent which comprises: (a) placing a lining in said pipe along said length; (b) providing a conduit inside said lining along said length before said lining has been fixed in place; (c) causing said pipe effluent to flow through said conduit and out of the open end thereof into said pipe downstream of said length; and (d) fixing said lining in place in said pipe, in which step (a) comprises everting said lining into said pipe length, and step (b) comprises attaching the open end of said conduit to the trailing end of said everting lining so that said open end of said conduit opens to the outside of said everted lining, said conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 18
Independent Claim
177 words
The method of lining a length of pipe active in conveying effluent which comprises: (a) providing a first conduit in said pipe along said length and causing said pipe effluent to flow therethrough into said pipe downstream of said length; (b) placing a lining in said pipe along said length and over said first conduit; (c) providing a second conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said second conduit and out of an open end thereof into said pipe downstream of said length; and (e) fixing said lining in place in said pipe in which step (b) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said second conduit to the trailing end of said everting lining so that said open end of said second conduit opens to the outside of said everted lining, said second conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 19
Independent Claim
177 words
The method of lining a length of pipe active in conveying effluent which comprises: (a) providing a first conduit in said pipe along said length and causing said pipe effluent to flow therethrough into said pipe downstream of said length; (b) placing a lining in said pipe along said length and over said first conduit; (c) providing a second conduit inside said lining along said length before said lining has been fixed in place; (d) causing said pipe effluent to flow through said second conduit and out of an open end thereof into said pipe downstream of said length; and (e) fixing said lining in place in said pipe in which step (b) comprises everting said lining into said pipe length, and step (c) comprises attaching the open end of said second conduit to the trailing end of said everting lining so that said open end of said second conduit opens to the outside of said everted lining, said second conduit extending along said pipe length by being pulled by said trailing end of said everting lining.
Claim 20
Dependent Claim
28 words
In the method of either of claims 14 or 15, the step of removing said inside-the-lining conduit after said lining has been fixed in place in said pipe.
Claim 21
Independent Claim
25 words
The method of either of claims 14 or 15, in which said pipe effluent is caused to flow by pumping said effluent through said conduits.
Claim 22
Dependent Claim
33 words
In the method of either of claims 14 or 15, obstructing normal flow of effluent at a point upstream of said length, said conduit or conduits being there operatively connected to said pipe.
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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) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |