US4407351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for heat absorption from a sea bottom or the like
Assignee: Foerenade Fabriksverken AB
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Filing: 1982-04-22
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Granted: 1983-10-04
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Expires: 2002-04-22
Abstract
Abstract In order to prevent a conduit for heat absorption from a sea bottom or the like to float up in wintertime from the bottom due to icing, it is proposed according to the invention that the flow cross-section of the conduit is heat insulated from the surrounding water. Such insulation is obtained according to one embodiment of the invention, in that a work fluid is imparted with a laminar flow in the upper cross-section (15) of the conduit by means of a constricting inner pipe (12) located upwardly in the conduit, while the work fluid in the remaining cross-section (16) is permitted to have a turbulent flow.
Inventors
- 👤 Erik L. Backlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
F; F24; F24V; F24V50/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A method of heat absorption by means of a pipe conduit laid down on a sea bottom or the like, wherein heat from the bottom and the ambient water is emitted to a working fluid in the conduit, wherein in order to prevent said conduit from floating up from said bottom due to ice-formation, one or more upper or lateral portions of the flow cross-section are heat-insulated against the ambient water, so that ice-formation, if present, is restricted to the bottom side of said conduit to freeze fast said conduit to the bottom, wherein the heat insulation is achieved in that the working fluid in the conduit is caused to stand-still or imparted with a laminar flow in said upper and lateral portions of the flow cross-section and imparted with a turbulent flow in the remaining portion of the flow cross-section.
Claim 2
Independent Claim
141 words
A method of heat absorption by means of a pipe conduit laid down on a sea bottom or the like, wherein heat from the bottom and the ambient water is emitted to a working fluid in the conduit, wherein in order to prevent said conduit from floating up from said bottom due to ice-formation, one or more upper or lateral portions of the flow cross-section are heat-insulated against the ambient water, so that ice-formation, if present, is restricted to the bottom side of said conduit to freeze fast said conduit to the bottom, wherein the heat insulation is achieved in that the working fluid in the conduit is caused to stand-still or imparted with a laminar flow in said upper and lateral portions of the flow cross-section and imparted with a turbulent flow in the remaining portion of the flow cross-section.
References Cited (Backward Citations)
US1761281A
Cited
US2773513A
Cited
US3807183A
Cited
US3777502A
Cited
CA1064272A
Cited
US4192630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |