Patent US3812908A successfully refreshed from Google Patents.
US3812908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transferring device
Assignee: US Philips Corp
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Filing: 1972-05-24
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Granted: 1974-05-28
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Expires: 1992-05-24
Abstract
Abstract A device of the type known as heat pipe in which the heating means are inside the chamber and covered with a capillary structure in contact with the liquid to be evaporated. Applicable notably to isothermal oven. FIG. 1.
Inventors
- 👤 P Coville
- 👤 A Laurencier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; F28D15/046
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A heat transfer device comprising: an outer tube having an inner surface, an inner tube having length and an outer surface along said length, the inner tube situated within the outer tube, with an annular heat-treatment space defined between said tubes, a quantity of vaporizable liquid within said space, an energizable heat source comprising a cable covered with a first capillary structure, a second capillary structure covering said outer surface of said inner tube, said cable being wound around said inner tube and thereby holding said second capillary structure against said outer surface of said inner tube.
Claim 2
Dependent Claim
97 words
A heat transfer device comprising: an outer tube having an inner surface, an inner tube having length and an outer surface along said length, the inner tube situated within the outer tube, with an annular heat-treatment space defined between said tubes, a quantity of vaporizable liquid within said space, an energizable heat source comprising a cable covered with a first capillary structure, a second capillary structure covering said outer surface of said inner tube, said cable being wound around said inner tube and thereby holding said second capillary structure against said outer surface of said inner tube.
Claim 3
Dependent Claim
23 words
A device according to claim 1 further comprising connection means connecting said second capillary structure to said inner surface of said outer tube.
Claim 4
Dependent Claim
19 words
A device according to claim 2 wherein said connection means comprises a rod extending axially in said annular space.
Claim 5
Dependent Claim
40 words
A device according to claim 3 wherein said rod is situated intermediate said second capillary structure and said cable such that said first capillary structure on said cable is held in contact with said inner surface of said outer tube.
Claim 6
Dependent Claim
15 words
A device according to claim 4 further comprising a third capillary structure covering said rod.
Claim 7
Dependent Claim
49 words
A device according to claim 1 wherein said inner tube is positioned eccentrically within said outer tube, whereby said first capillary structure covering said heating means is held in contact with and between said second capillary structure covering said inner tube and said inner surface of said outer tube.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |