US4449578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for releasing heat
Assignee: Altemira Co Ltd
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Filing: 1981-06-12
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Granted: 1984-05-22
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Expires: 2001-06-12
Abstract
Abstract A heat releasing device comprises an extruded aluminum main body including a horizontal wall for attaching heat emitting elements thereto and a vertical wall formed with a large number of gouged fins on at least one of its opposite sides, and a heat pipe portion provided on or in the vertical wall. The heat released from heat emitting elements, such as semiconductor elements, mounted on the horizontal wall is absorbed by the main body, transferred to the heat pipe portion and then radiated from the fins on the vertical wall.
Inventors
- 👤 Masaaki Munekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:40
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W40/73; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F28D15/0275; H10W40/60; H10W40/611; H10W40/20; H10W40/231; H10W40/235
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A device for releasing heat comprising an extruded aluminum main body having a predetermined cross section and including a horizontal wall to serve as a portion for attaching heat emitting elements thereto and a vertical wall to serve as a finned portion, and a heat pipe portion provided on one side of the vertical wall, the vertical wall being formed with fins on at least one of its opposite sides to serve as the finned portion, said fins being integral with the main body and formed by gouging the main body at a multiplicity of locations spaced apart by a specified distance, the heat pipe portion being provided by a looped pipe having a vacuum interior and containing a working fluid enclosed therein.
Claim 2
Independent Claim
123 words
A device for releasing heat comprising an extruded aluminum main body having a predetermined cross section and including a horizontal wall to serve as a portion for attaching heat emitting elements thereto and a vertical wall to serve as a finned portion, and a heat pipe portion provided on one side of the vertical wall, the vertical wall being formed with fins on at least one of its opposite sides to serve as the finned portion, said fins being integral with the main body and formed by gouging the main body at a multiplicity of locations spaced apart by a specified distance, the heat pipe portion being provided by a looped pipe having a vacuum interior and containing a working fluid enclosed therein.
Claim 3
Dependent Claim
55 words
A device as defined in claim 1 wherein the looped pipe includes upper and lower two straight tubular portions disposed in parallel and fixedly fitted in holders of C-shaped cross section, the holders being formed integrally with the vertical wall and spaced apart one above the other in corresponding relation to the straight tubular portions.
Claim 4
Dependent Claim
20 words
A device as defined in claim 2 wherein the holders are approximately equal to the straight tubular portions in length.
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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |