Patent US3948313A successfully refreshed from Google Patents.
US3948313A
Expired / Lapsed
US
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Arrangement to control heat flow between a member and its environment
Assignee: Dow Chemical Co
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Filing: 1973-02-09
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Granted: 1976-04-06
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Expires: 1993-02-09
Abstract
Abstract An arrangement of insulating, thermal absorbing and/or dissipating elements controlling heat flow between a member and its environment. In certain permafrost environments, for example, one or more elements of the system can include a heat sink and/or a thermal bleed where the member is heated. The arrangement controls heat flow from a heated member at such a rate that the total heat transfer does not exceed the limits of the residual heat capacity of permafrost below the freezing point thereof during cyclic climatic influences. The arrangement takes advantage of the fact that artificial heat from the heated member can be controlled, while natural solar heat is balanced by the seasons. The elements also serve to maintain relatively stable temperature differentials between heated or cryogenic materials and their adjacent ground support, so there is a minimal effect of one on the other.
Inventors
- 👤 John S. Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:33
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/003; F; F16; F16L; F16L59/00; F16L59/14; F16L59/15; Y; Y10; Y10S; Y10S166/00; Y10S166/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
An arrangement of elements located between an earthen support and a member maintained or adapted to be maintained at a temperature different than that of its adjacent earthen support, one of said elements comprising a layer of insulation material, another of said elements comprising a closed cell structure including a given contained fluid means for storing excess quantities of heat during a warm climatic season and dissipating the same during a cold climatic season thereby permitting the heat storage capacity of said means to be naturally regenerative by climatic seasonal changes, said elements thereby maintaining a relatively controlled temperature differential between said member and said earthen support.
Claim 2
Dependent Claim
107 words
An arrangement of elements located between an earthen support and a member maintained or adapted to be maintained at a temperature different than that of its adjacent earthen support, one of said elements comprising a layer of insulation material, another of said elements comprising a closed cell structure including a given contained fluid means for storing excess quantities of heat during a warm climatic season and dissipating the same during a cold climatic season thereby permitting the heat storage capacity of said means to be naturally regenerative by climatic seasonal changes, said elements thereby maintaining a relatively controlled temperature differential between said member and said earthen support.
Claim 3
Dependent Claim
16 words
The arrangement of claim 1 wherein said means includes a thermal bleed immediately adjacent said member.
Claim 4
Dependent Claim
37 words
The arrangement of claim 2 wherein said thermal bleed comprises a closed cell with an internal dual passageway and including a thermally sensitive fluid which can move through said passageway to carry heat away from said member.
Claim 5
Dependent Claim
26 words
The arrangement of claim 2 wherein said means further includes a heat sink located on the side of said insulation layer opposite from said thermal bleed.
Claim 6
Dependent Claim
50 words
The arrangement of claim 4 wherein said means still further includes a second thermal bleed between said heat sink and said insulation layer to assist said heat sink in preventing heat from reaching said earthen support during the summer season and to regenerate the heat sink during the winter season.
Claim 7
Dependent Claim
36 words
The arrangement of claim 1 wherein said means includes a heat sink of sufficient capacity to maintain a relatively constant temperature differential between said member and said elements despite cyclic climatic variances in said earthen support.
Claim 8
Dependent Claim
17 words
The arrangement of claim 6 wherein said insulation layer is between said heat sink and said member.
Claim 9
Dependent Claim
20 words
The arrangement of claim 7 wherein a second insulation layer is located between said heat sink and said earthen support.
Claim 10
Dependent Claim
19 words
The arrangement of claim 7 wherein said heat sink has a transition temperature below that of said earthen support.
Claim 11
Dependent Claim
19 words
An arrangement of claim 1, wherein the temperature of said member is below that of its adjacent earthen support.
References Cited (Backward Citations)
US3472314A
Cited
US3564862A
Cited
US3721298A
Cited
US3613792A
Cited
US3650119A
Cited
US3662832A
Cited
US3650327A
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US3749163A
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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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |