Patent US4505613A successfully refreshed from Google Patents.
US4505613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for lining pipes in pipelines
Assignee: Hakko Co Ltd
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Filing: 1983-04-29
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Granted: 1985-03-19
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Expires: 2003-04-29
Abstract
Abstract A method for lining pipes in a town gas underground pipeline. The method is characterized in that carrier air is flown together with plastics mist passing through a route comprising a branch line for distributing the gas to consumers, so that the pipeline and branch pipe are lined with the plastics.
Inventors
- 👤 Motoyuki Koga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/164
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising the steps of: flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline; supplying plastics mist in said cooperating pipes via said carrier air; discharging said carrier air together with said plastics mist out of said cooperating pipes; and recovering said plastics mist into a plastics mist recovery tank.
Claim 2
Independent Claim
86 words
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising the steps of: flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline; supplying plastics mist in said cooperating pipes via said carrier air; discharging said carrier air together with said plastics mist out of said cooperating pipes; and recovering said plastics mist into a plastics mist recovery tank.
Claim 3
Dependent Claim
27 words
The method according to claim 1, wherein said carrier air is introduced into said pipeline via at least one of said branch pipes at an end thereof.
Claim 4
Dependent Claim
31 words
The method according to claim 1, wherein said carrier air is introduced into said pipeline via an end of the pipeline and is discharged from an end of a branch pipe.
Claim 5
Dependent Claim
18 words
The method according to claim 2, wherein said carrier air is discharged from an end of the pipeline.
Claim 6
Dependent Claim
19 words
The method according to claim 2, wherein said carrier air is discharged from an end of a branch pipe.
Claim 7
Dependent Claim
46 words
The method according to claim 1, wherein said carrier air is flowed into some but not all of said branch pipes and further comprising introducing compressed air into said pipeline via at least one of said branch pipes in which said carrier has not been flowed.
Claim 8
Dependent Claim
43 words
The method according to claim 1, further comprising supplying abrasive grit in said cooperating pipes via said carrier air; discharging said carrier air together with said abrasive grit out of said cooperating pipes; and recovering said abrasive grit into a grit recovery tank.
Claim 9
Independent Claim
117 words
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising: flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline; supplying abrasive grit in said cooperating pipes via said carrier air; discharging said carrier air together with said abrasive grit out of said cooperating pipes; recovering said abrasive grit into a grit recovery tank; supplying plastics mist in said cooperating pipes via said carrier air; discharging said carrier air together with said plastics mist out of said cooperating pipes; and recovering said plastics mist into a plastics mist recovery tank.
Claim 10
Independent Claim
117 words
A method for lining cooperating pipes of an underground pipeline which pipeline includes a plurality of branch pipes each having an end which opens to the atmosphere, comprising: flowing carrier air in said cooperating pipes and through at least one of said branch pipes and said pipeline; supplying abrasive grit in said cooperating pipes via said carrier air; discharging said carrier air together with said abrasive grit out of said cooperating pipes; recovering said abrasive grit into a grit recovery tank; supplying plastics mist in said cooperating pipes via said carrier air; discharging said carrier air together with said plastics mist out of said cooperating pipes; and recovering said plastics mist into a plastics mist recovery tank.
Claim 11
Dependent Claim
27 words
The method according to claim 8, wherein said carrier air is introduced into said pipeline via at least one of said branch pipes at an end thereof.
Claim 12
Dependent Claim
31 words
The method according to claim 8, wherein said carrier air is introduced into said pipeline via an end of the pipeline and is discharged from an end of a branch pipe.
Claim 13
Dependent Claim
18 words
The method according to claim 9, wherein said carrier air is discharged from an end of the pipeline.
Claim 14
Dependent Claim
19 words
The method according to claim 9, wherein said carrier air is discharged from an end of a branch pipe.
Claim 15
Dependent Claim
46 words
The method according to claim 8, wherein said carrier air is flowed into some but not all of said branch pipes and further comprising introducing compressed air into said pipeline via at least one of said branch pipes in which said carrier has not been flowed.
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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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |