US4724901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for releasing heat
Assignee: Altemira Co Ltd
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Filing: 1980-05-20
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Granted: 1988-02-16
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Expires: 2000-05-20
Abstract
Abstract A heat releasing device comprising a heat transmitting block having a heat source attaching portion and a bore extending therethrough, a looped heat pipe having at least one pair of straight tubular portions, the first of the straight tubular portions being intimately fitted in the bore, and a multiplicity of radiating fins attached to the heat pipe.
Inventors
- 👤 Masaaki Munekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:58
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F28D15/0275; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A device for releasing heat comprising a heat transmitting block having a heat source attaching portion and a bore extending therethrough, the bore being defined by a jagged surface for releasing heat, a looped heat pipe having at least one pair of parallel straight tubular portions and at least one pair of bent portions, the first of the straight tubular portions being intimately fitted in the bore, and a multiplicity of radiating fins attached to the heat pipe the pipe having an inner portion in which a working fluid is sealingly enclosed, one of the straight tubular portion being positioned higher than the first straight tubular portion while bent portions connecting the straight tubular portions are inclined when seen in side view, the uppermost straight tubular portion serving as a condenser and the lower one as an evaporator.
Claim 2
Independent Claim
138 words
A device for releasing heat comprising a heat transmitting block having a heat source attaching portion and a bore extending therethrough, the bore being defined by a jagged surface for releasing heat, a looped heat pipe having at least one pair of parallel straight tubular portions and at least one pair of bent portions, the first of the straight tubular portions being intimately fitted in the bore, and a multiplicity of radiating fins attached to the heat pipe the pipe having an inner portion in which a working fluid is sealingly enclosed, one of the straight tubular portion being positioned higher than the first straight tubular portion while bent portions connecting the straight tubular portions are inclined when seen in side view, the uppermost straight tubular portion serving as a condenser and the lower one as an evaporator.
Claim 3
Dependent Claim
31 words
A device as defined in claim 1 wherein the heat pipe comprises a hairpin tube and a U-shaped tube joined together by butt welding in the form of an elongated loop.
Claim 4
Dependent Claim
33 words
A device as defined in claim 1 wherein the first straight tubular portion is fitted in the bore of the heat transmitting block by being inserted into the bore and thereafter diametrically enlarged.
Claim 5
Dependent Claim
35 words
A device as defined in claim 1 wherein the radiating fins are attached only to the second of the straight tubular portions of the heat pipe, and a turn preventing member extends through the fins.
Claim 6
Independent Claim
32 words
A device as defined in any one of claims 1 to 4 wherein the heat transmitting block has a heat releasing jagged surface on each of its upper side and rear side.
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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |