US4815528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor resistant arteries
Assignee: Aavid Thermal Corp
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Filing: 1987-09-25
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Granted: 1989-03-28
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Expires: 2007-09-25
Abstract
Abstract A vapor block resistant liquid artery structure for heat pipes. A solid tube artery with openings is encased in the sintered material of a heat pipe wick. The openings are limited to that side of the artery which is most remote from the heat source. The liquid in the artery can thus exit the artery through the openings and wet the sintered sheath, but vapor generated at the heat source is unlikely to move around the solid wall of the artery and reverse its direction in order to penetrate the artery through the openings. An alternate embodiment uses finer pore size wick material to resist vapor entry.
Inventors
- 👤 Robert M. Shaubach
- 👤 Peter M. Dussinger
- 👤 Matthew T. Buchko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
A heat pipe comprising: a sealed casing; capillary wick means located adjacent to the inside surface of the casing; vaporizable heat transfer fluid within the sealed casing; and at least one artery located within and surrounded by the capillary wick means, the artery constructed of walls of porous material which has a finer pore structure than the pore structure of the capillary wick means.
Claim 2
Dependent Claim
64 words
A heat pipe comprising: a sealed casing; capillary wick means located adjacent to the inside surface of the casing; vaporizable heat transfer fluid within the sealed casing; and at least one artery located within and surrounded by the capillary wick means, the artery constructed of walls of porous material which has a finer pore structure than the pore structure of the capillary wick means.
Claim 3
Dependent Claim
44 words
The heat pipe of claim 1 wherein the artery includes at least one opening within a porous wall, the opening being oriented so that it is in a surface of the artery which is remote from a heat source applied to the heat pipe.
References Cited (Backward Citations)
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |