US3859800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air convection device 2 a.g. for permafrost stabilization
Assignee: Dow Chemical Co
•
Filing: 1973-03-15
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Granted: 1975-01-14
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Expires: 1993-03-15
Abstract
Abstract A device and method for removing heat from permafrost soil to stabilize the same. The device and method directly utilizes cold atmospheric air as a direct heat exchange media to remove such heat by convection. The device includes a continuous passageway permitting cold air to enter directly from the atmosphere, pass adjacent the permafrost soil to remove heat and then be vented back to the atmosphere.
Inventors
- 👤 Louis E Wuelpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/11; E02D3/115; E02D27/00; E02D27/32; E02D27/35
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A device for stabilizing permafrost adjacent thereto, said device located in the permafrost to a significant depth and having a longitudinal chamber, the outer wall portion of said chamber being of a substantially thermal conducting material, said device including inner and outer passageways extending longitudinally within said chamber, both of said passageways being open to the atmosphere at their uppermost extents, said passageways being in open communication with one another adjacent their lowermost extents, a thermocell having itself a chamber containing a liquid of a freezing temperature below that of said permafrost, said thermocell located at least partially about or adjacent said outer wall and penetrating into said permafrost, whereby air at a temperature less than that of the adjacent permafrost can enter the inner passageway and pass therefrom into the outer passageway adjacent the thermocell located in said permafrost so as to act as a direct heat exchange media to remove heat from said thermocell which in turn absorbs heat from the permafrost to thereby stabilize the permafrost.
Claim 2
Independent Claim
169 words
A device for stabilizing permafrost adjacent thereto, said device located in the permafrost to a significant depth and having a longitudinal chamber, the outer wall portion of said chamber being of a substantially thermal conducting material, said device including inner and outer passageways extending longitudinally within said chamber, both of said passageways being open to the atmosphere at their uppermost extents, said passageways being in open communication with one another adjacent their lowermost extents, a thermocell having itself a chamber containing a liquid of a freezing temperature below that of said permafrost, said thermocell located at least partially about or adjacent said outer wall and penetrating into said permafrost, whereby air at a temperature less than that of the adjacent permafrost can enter the inner passageway and pass therefrom into the outer passageway adjacent the thermocell located in said permafrost so as to act as a direct heat exchange media to remove heat from said thermocell which in turn absorbs heat from the permafrost to thereby stabilize the permafrost.
Claim 3
Dependent Claim
38 words
The device of claim 1 wherein said inner passageway is defined by a generally self-supporting substantially non-thermal conducting material so that the temperature of the incoming cold air is not substantially reduced prior to reaching the outer passageway.
Claim 4
Dependent Claim
37 words
The device of claim 2 wherein the extent of the outer wall of the chamber extending above said permafrost is thermally insulated so as to reduce the conductivity of warm air by said chamber into the permafrost.
Claim 5
Dependent Claim
32 words
The device of claim 3 wherein insulation layers are generally laterally disposed from the device below the surface of the permafrost to reduce the conduction of heat radiation into the permafrost therebelow.
Claim 6
Dependent Claim
28 words
The device of claim 4 wherein the open upper ends of the passageway have shields spacedly located directly thereabove so as to prevent entry of undesirable elements thereinto.
Claim 7
Dependent Claim
14 words
The device of claim 1 wherein the same is a piling supporting another structure.
Claim 8
Dependent Claim
20 words
The device of claim 1 wherein the same is located adjacent a structure to stabilize the permafrost supporting the structure.
References Cited (Backward Citations)
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Cited
US2193219A
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US2554661A
Cited
US3135097A
Cited
US3220470A
Cited
US3271710A
Cited
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Cited
US3674086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |