US4454173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for lining pipes in a pipeline
Assignee: Hakko Co Ltd
•
Filing: 1983-04-29
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Granted: 1984-06-12
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Expires: 2003-04-29
Abstract
Abstract A method for lining pipes in a pipeline. The method is characterized in that the air in the pipeline is sucked from an outlet by a vacuum pump together with plastics mist, and additional air is supplied from an inlet of the pipeline at a low pressure, so that the pipeline is lined with the plastics. The residual plastics mist is recovered into a tank at the outlet end of the pipeline.
Inventors
- 👤 Motoyuki Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/164
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
59 words
A method for lining pipes in a pipeline comprising: connecting an end opening of the pipeline to a vacuum generator; supplying plastics mist to the other end opening of the pipeline; sucking the air in the pipeline by said vacuum generator together with the plastics mist; and recovering the residual plastics mist at the outlet end of the pipeline.
Claim 2
Independent Claim
59 words
A method for lining pipes in a pipeline comprising: connecting an end opening of the pipeline to a vacuum generator; supplying plastics mist to the other end opening of the pipeline; sucking the air in the pipeline by said vacuum generator together with the plastics mist; and recovering the residual plastics mist at the outlet end of the pipeline.
Claim 3
Dependent Claim
20 words
The method according to claim 1 further comprising supplying air into the pipeline from the inlet at a low pressure.
Claim 4
Dependent Claim
31 words
The method according to claim 1 further comprising connecting the discharge port of said vacuum generator to a plastics mist supplying means so as to operate it to produce plastics mist.
Claim 5
Dependent Claim
28 words
The method according to claim 1 further comprising connecting the discharge port of said vacuum generator to the inlet of the pipeline to supply air into the pipeline.
Claim 6
Dependent Claim
24 words
The method according to claim 1 further comprising performing a grit-blasting against the inner wall of the pipeline before the lining of the pipeline.
Claim 7
Dependent Claim
17 words
The method according to claim 1 further comprising causing the air stream in the pipeline to swirl.
Claim 8
Dependent Claim
24 words
The method according to claim 1 wherein said plastics mist is supplied from an end of at least one branch pipe of the pipeline.
References Cited (Backward Citations)
US4327132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |