Patent US3749159A successfully refreshed from Google Patents.
US3749159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transporting device
Assignee: US Philips Corp
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Filing: 1971-06-23
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Granted: 1973-07-31
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Expires: 1991-06-23
Abstract
Abstract A heat transporting device comprising a closed container having at least one first and at least one second heat transmission wall, and a heat transporting medium which absorbs thermal energy through the first heat transmission wall while changing from the liquid phase into the vapor phase and supplies thermal energy to the second heat transmission wall while changing from the vapor phase into the liquid phase; the container furthermore comprises a porous mass which connects the second to the first heat transmission wall in such manner that the medium condensed through said mass on the second heat transmission wall can flow back to the first heat transmission wall due to capillary action. One or more supporting elements are arranged in the container for supporting the walls of the container against pressure forces exerted thereon from without, which supporting elements permit the flow of medium vapor in the direction of heat transport.
Inventors
- 👤 R Meijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:00
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; F28D15/046; F28F; F28F2225/00; F28F2225/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
A heat pipe device operable with a heat-transporting medium having a vapor phase when heated sufficiently and a liquid phase then sufficient heat is extracted therefrom, this device being operable to receive thermal energy from a source and to supply thermal energy to a sink, and being subject to external pressure, the device comprising walls which define a closed container and inner surfaces of the walls defining a space therein, two of said walls being first and second spaced apart heat-transmitting walls, a quantity of said heat-transporting medium situated within said container, a porous mass along said inner surfaces the mass having structure permitting capillary flow of said liquid phase medium therethrough, and support means being a resilient mass and having strength in compression and situated within said container and contacting and providing substantially uninform pressure against said walls thereof for resisting said external pressure thereto, said supporting means being porous for permitting a flow of said vapor phase medium therethrough.
Claim 2
Dependent Claim
161 words
A heat pipe device operable with a heat-transporting medium having a vapor phase when heated sufficiently and a liquid phase then sufficient heat is extracted therefrom, this device being operable to receive thermal energy from a source and to supply thermal energy to a sink, and being subject to external pressure, the device comprising walls which define a closed container and inner surfaces of the walls defining a space therein, two of said walls being first and second spaced apart heat-transmitting walls, a quantity of said heat-transporting medium situated within said container, a porous mass along said inner surfaces the mass having structure permitting capillary flow of said liquid phase medium therethrough, and support means being a resilient mass and having strength in compression and situated within said container and contacting and providing substantially uninform pressure against said walls thereof for resisting said external pressure thereto, said supporting means being porous for permitting a flow of said vapor phase medium therethrough.
Claim 3
Dependent Claim
176 words
A heat pipe device as claimed in claim 1, characterized in that the supporting means are formed by a compressed porous filling mass of wire or ribbon-shaped material, the pores of which have such a size that the relationship 2 gamma cos /R -Delta p - sigma gh > 2 gamma cos 1/R1 is satisfied, in which: gamma surface tension of liquid heat transporting medium theta angle of contact for liquid heat transporting medium in the pores of the porous mass R hydraulic radius of the pores in the porous mass theta 1 angle of contact for liquid heat transporting medium in the pores of the filling mass, R1 hydraulic radius of the pores in the filling mass Delta p pressure loss of liquid heat transporting medium in the porous mass between the second and the first heat transmission wall as a result of the resistance to flow of the said mass sigma density of liquid heat transporting medium. g acceleration of gravity h difference in height between the first and the second heat transmission wall.
Claim 4
Dependent Claim
17 words
A heat pipe device as claimed in claim 2, characterized in that the material is steel wool.
Claim 5
Dependent Claim
117 words
A heat pipe comprising walls which define a closed container and inner surfaces of the walls defining a space therein, two of said walls being spaced-apart first and second heat-transmitting walls, heat transporting medium having vapor and liquid phases when heated and cooled respectively within said container, a porous mass along said inner surfaces interconnecting said heat transmitting walls, this mass permitting capillary flow of said liquid phase medium therethrough, support means having compression strength situated within and substantially filling space and contacting said walls inner surfaces for providing compression strength to said container, said support means being a resilient mass and being porous permitting flow of said vapor phase medium therethrough between said heat transmitting walls.
Claim 6
Dependent Claim
117 words
A heat pipe comprising walls which define a closed container and inner surfaces of the walls defining a space therein, two of said walls being spaced-apart first and second heat-transmitting walls, heat transporting medium having vapor and liquid phases when heated and cooled respectively within said container, a porous mass along said inner surfaces interconnecting said heat transmitting walls, this mass permitting capillary flow of said liquid phase medium therethrough, support means having compression strength situated within and substantially filling space and contacting said walls inner surfaces for providing compression strength to said container, said support means being a resilient mass and being porous permitting flow of said vapor phase medium therethrough between said heat transmitting walls.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |