Patent US3820596A successfully refreshed from Google Patents.
US3820596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transporting device
Assignee: US Philips Corp
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Filing: 1972-01-17
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Granted: 1974-06-28
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Expires: 1992-01-17
Abstract
Abstract In a heat pipe device having a porous mass through which heat transporting medium condensate can flow from the condenser to the evaporator by capillary action, this porous mass is kept in its place relative to the container by at least one resilient and hollow element. The cavity within the resilient element forms a closed space in which a filling medium is present, the pressure of which, at least at the operating temperature of the device, is higher than the pressure in the container, whereby the resilient element exerts a force on the porous mass due to both said resiliance and the influence of the pressure differential across these members.
Inventors
- 👤 E Weinhardt
- 👤 Wit C De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:12
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0233
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
226 words
A heat transporting device comprising a closed container having at one end at least one first and at the other end at least one second heat transmission wall, said container comprising 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 delivers thermal energy to the second heat transmission wall while changing from the vapor phase into the liquid phase, the container comprising a porous mass which communicates the first heat transmission wall with the second heat transmission wall in such manner that medium condensed through said mass on the second heat transmission wall can flow back by capillary action to the first heat transmission wall, at least one resilient element being furthermore arranged in the container and keeping the porous mass in its place relative to the container by resilience action, characterized in that the resilient element is internally hollow and the cavity inside the element forms a closed space in which a filling medium is present the pressure of which, at least at the operating temperature of the device, is higher than the pressure in the container and the resilient elements exerts an extra force on the porous mass under the influence of the pressure differential across these for maintaining the place of the said mass within the container.
Claim 2
Dependent Claim
226 words
A heat transporting device comprising a closed container having at one end at least one first and at the other end at least one second heat transmission wall, said container comprising 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 delivers thermal energy to the second heat transmission wall while changing from the vapor phase into the liquid phase, the container comprising a porous mass which communicates the first heat transmission wall with the second heat transmission wall in such manner that medium condensed through said mass on the second heat transmission wall can flow back by capillary action to the first heat transmission wall, at least one resilient element being furthermore arranged in the container and keeping the porous mass in its place relative to the container by resilience action, characterized in that the resilient element is internally hollow and the cavity inside the element forms a closed space in which a filling medium is present the pressure of which, at least at the operating temperature of the device, is higher than the pressure in the container and the resilient elements exerts an extra force on the porous mass under the influence of the pressure differential across these for maintaining the place of the said mass within the container.
Claim 3
Dependent Claim
19 words
A heat transporting device as claimed in claim 1, characterized in that the filling medium is an inert gas.
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) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |