US4109709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pipes, process and apparatus for manufacturing same
Assignee: Suzuki Metal Industry Co Ltd
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Filing: 1976-05-17
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Granted: 1978-08-29
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Expires: 1996-05-17
Abstract
Abstract Heat pipes comprising an outer tubular material closed at both ends, a wick of metal fibers, an inner tubular material covered with the wick and inserted in the outer tubular material and a heat transfer volatile liquid confined in the closed outer tubular material. An evaporation region and a condensing region are respectively constituted in the end portions of the outer tubular material. The liquid in the evaporation region vaporizes when heated and the vapor is passed to the condensing region to condense while giving the heat of the vapor to other materials outside the heat pipe, and the condensed liquid is returned to the evaporation region by the capillary action of said wick, thus repeating a cycle of the evaporation and condensation.
Inventors
- 👤 Ichiro Honda
- 👤 Shigetoshi Takasu
- 👤 Yoshio Onuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:07
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/04; F28D15/046; F28F; F28F2200/00; F28F2200/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49353
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
In a wick-secured inner tubular material for a heat pipe, the combination comprising an elongated metal tubular material, a wick of metal fibers in tow form disposed about said metal tubular material, an oxidized film on the surface of said metal fibers to provide a rough surface on said metal fibers to increase the wettability thereof, and a binding material disposed about said wick to secure the wick to said metal tubular material, said metal tubular material with the wick of metal fibers secured hereto by said binding material being adapted to be disposed within an elongated outer tubular means to form said heat pipe with the metal fibers of said wick holding a heat transfer liquid by capillary action.
Claim 2
Dependent Claim
120 words
In a wick-secured inner tubular material for a heat pipe, the combination comprising an elongated metal tubular material, a wick of metal fibers in tow form disposed about said metal tubular material, an oxidized film on the surface of said metal fibers to provide a rough surface on said metal fibers to increase the wettability thereof, and a binding material disposed about said wick to secure the wick to said metal tubular material, said metal tubular material with the wick of metal fibers secured hereto by said binding material being adapted to be disposed within an elongated outer tubular means to form said heat pipe with the metal fibers of said wick holding a heat transfer liquid by capillary action.
Claim 3
Dependent Claim
20 words
In a wick-secured inner tubular material according to claim 1 wherein said binding material comprises a yarn of metal fibers.
Claim 4
Dependent Claim
20 words
In a wick-secured inner tubular material according to claim 1 wherein said binding material comprises a yarn of artificial fibers.
Claim 5
Dependent Claim
20 words
In a wick-secured inner tubbular material according to claim 1 wherein said binding material comprises a yarn of natural fibers.
Claim 6
Dependent Claim
18 words
In a wick-secured inner tubular material according to claim 1 wherein said binding material comprises a metal wire.
Claim 7
Dependent Claim
141 words
In a wick-secured inner tubular material for a heat pipe, the combination comprising an elongated metal tubular material, a wick of metal fibers in tow form disposed about said metal tubular material, and a binding material disposed about said wick to secure the wick to said metal tubular material, said metal tubular material with the wick of metal fibers secured hereto by said binding material being adapted to be disposed within an elongated outer tubular means to form said heat pipe with the metal fibers of said wick holding a heat transfer liquid by capillary action, said elongated metal tubular material comprising a spirally wound hoop element having at least some spirally disposed edges which are spaced from one another, and wherein said spirally wound hoop element has a variable pitch to provide at least some differently spaced spirally disposed edges.
Claim 8
Dependent Claim
141 words
In a wick-secured inner tubular material for a heat pipe, the combination comprising an elongated metal tubular material, a wick of metal fibers in tow form disposed about said metal tubular material, and a binding material disposed about said wick to secure the wick to said metal tubular material, said metal tubular material with the wick of metal fibers secured hereto by said binding material being adapted to be disposed within an elongated outer tubular means to form said heat pipe with the metal fibers of said wick holding a heat transfer liquid by capillary action, said elongated metal tubular material comprising a spirally wound hoop element having at least some spirally disposed edges which are spaced from one another, and wherein said spirally wound hoop element has a variable pitch to provide at least some differently spaced spirally disposed edges.
References Cited (Backward Citations)
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US3576210A
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US3681843A
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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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |