US4176691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for arresting propagating fractures in pipelines
Assignee: British Gas Corp
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Filing: 1978-04-17
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Granted: 1979-12-04
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Expires: 1998-04-17
Abstract
Abstract A device for arresting the propagation of a crack, split or fracture in a pipeline comprises a cylindrical sleeve of greater diameter than the pipeline and having an annular and end plate fixed at each end thereof, the assembly thus formed being arranged to be positioned around the pipeline so as to define an annular space therebetween which may be filled with grout material of high compressive strength.
Inventors
- 👤 Dennis W. Jude
- 👤 Joseph S. Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:13
CPC Classifications
F; F16; F16L; F16L57/00; F16L57/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
In combination, a pipeline and a pipeline fracture-arresting means for arresting fractures in said pipeline, said fracture-arresting means comprising: a single cylindrical sleeve of greater diameter than the pipeline and positioned substantially concentrically around a continuous region of the pipeline so as to define an annular space therebetween, and an annular support means for bridging said annular space, said annular support means comprising a filling of a material having a high compressive strength and being bonded to the internal surface of the sleeve and the external surface of the pipeline, respectively, and two inwardly extending annular plates fixed one at each end of the sleeve, each annular plate having an inside diameter slightly greater than the outside diameter of the pipeline so that the innermost edge thereof is spaced from the external surface of the pipeline.
Claim 2
Dependent Claim
136 words
In combination, a pipeline and a pipeline fracture-arresting means for arresting fractures in said pipeline, said fracture-arresting means comprising: a single cylindrical sleeve of greater diameter than the pipeline and positioned substantially concentrically around a continuous region of the pipeline so as to define an annular space therebetween, and an annular support means for bridging said annular space, said annular support means comprising a filling of a material having a high compressive strength and being bonded to the internal surface of the sleeve and the external surface of the pipeline, respectively, and two inwardly extending annular plates fixed one at each end of the sleeve, each annular plate having an inside diameter slightly greater than the outside diameter of the pipeline so that the innermost edge thereof is spaced from the external surface of the pipeline.
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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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |