US3677302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-axial articulating pipeline structure
Assignee: SUBSEA EQUIPMENT ASS Ltd
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Filing: 1970-03-09
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Granted: 1972-07-18
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Expires: 1990-03-09
Abstract
Abstract A riser is disclosed wherein a plurality of substantially rigid pipes are enclosed within a larger outer pipe. The outer pipe is divided into rigid sections that are hinged together to allow the riser to bend on a bending axis normal to the riser axis. Alternate bending axes are disposed normal to the interstitial bending axes. The larger of the enclosed pipes are disposed along the diameter that coincides with the bending axes whereby the pipes form a helical twist of 90* to the next hinged-connection. The other enclosed pipes are layed spaced from and near to these larger pipes also in a helically twisting fashion thereby preserving their individual flexibility.
Inventors
- 👤 George W Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
F; F16; F16L; F16L7/00; E; E21; E21B; E21B17/00; E21B17/01; E21B17/015; F16L1/00; F16L1/12; F16L1/14; F16L1/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
A pipeline comprising: a plurality of pipes having different diameters, a substantially rigid outer casing enclosing said plurality of pipes, said outer casing being comprised of sections disposed end to end, means for connecting said sections together to allow two adjacent sections to bend about a bending axis normal to the outer casing axis while tension is maintained in said outer casing, two adjacent bending axes being disposed in non-parallel relationship to each other, and the longitudinal axes of larGest diameter pipes being disposed to intersect each one of said bending axis to inhibit undue bending stresses in the pipes.
Claim 2
Dependent Claim
100 words
A pipeline comprising: a plurality of pipes having different diameters, a substantially rigid outer casing enclosing said plurality of pipes, said outer casing being comprised of sections disposed end to end, means for connecting said sections together to allow two adjacent sections to bend about a bending axis normal to the outer casing axis while tension is maintained in said outer casing, two adjacent bending axes being disposed in non-parallel relationship to each other, and the longitudinal axes of larGest diameter pipes being disposed to intersect each one of said bending axis to inhibit undue bending stresses in the pipes.
Claim 3
Dependent Claim
18 words
The pipeline of either claim 1, wherein: said means include a pair of hinges connecting two sections together.
Claim 4
Dependent Claim
17 words
The pipeline of claim 2 wherein: said plurality of pipes are helically disposed within said outer casing.
Claim 5
Dependent Claim
20 words
The pipeline of claim 3 wherein: the two adjacent bending axes are further disposed to be orthogonal to each other.
Claim 6
Dependent Claim
20 words
The pipeline of claim 2 wherein: the two adjacent bending axes are further disposed to be orthogonal to each other.
Claim 7
Dependent Claim
20 words
The pipeline of claim 1 wherein the two adjacent bending axes are further disposed to be orthogonal to each other.
References Cited (Backward Citations)
US1485394A
Cited
US1905824A
Cited
US2175749A
Cited
US2578280A
Cited
US3017934A
Cited
US3366088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |