US4270604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sink
Assignee: Sumitomo Precision Products Co Ltd
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Filing: 1979-11-14
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Granted: 1981-06-02
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Expires: 1999-11-14
Abstract
Abstract The invention involves to improvements in heat snk. Required numbers of corrugated fins and separator sheets are alternately stacked together with side bars applied to the opposite edges of each corrugated fin, and all the parts are brazed together. Large thickness side bars are used for either one side or both sides, and the edges of the separator sheets and outer sides of the side bars are aligned, and a heat source is mounted on the outer surfaces of side bars. In this way, a heat sink of a desired sides can be assemble, and also the heat radiator performance can be improved.
Inventors
- 👤 Masakazu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:44
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; H; H10; H10W; H10W40/00; H10W40/20; H10W40/22; H10W40/226; H10W40/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
An improved heat sink comprising: a plurality of corrugated fins having opposed edges; a plurality of separator sheets having edges at opposite sides thereof, the edges of said sheets being spaced further apart than said edges of said fins, said fins and said sheets being stacked in alternating relationship with said edges of all said fins and all of said sheets on opposite sides of the stack and with the edges of each of the fins disposed inwardly of the stack relative to the edges of all of the sheets; a plurality of side bars, each having opposed outer and inner edges, there being a respective side bar for each said edge of each fin, the inner edge of each bar being disposed in contacting relationship to the corresponding fin edge, the outer edges of said bars and the edges of said sheets forming a flat, smooth surface on at least one of said opposite sides of said stack, said surface having a heat source mounted thereon; and brazing means for interconnecting said fins, sheets and bars together for efficient heat conductivity.
Claim 2
Dependent Claim
182 words
An improved heat sink comprising: a plurality of corrugated fins having opposed edges; a plurality of separator sheets having edges at opposite sides thereof, the edges of said sheets being spaced further apart than said edges of said fins, said fins and said sheets being stacked in alternating relationship with said edges of all said fins and all of said sheets on opposite sides of the stack and with the edges of each of the fins disposed inwardly of the stack relative to the edges of all of the sheets; a plurality of side bars, each having opposed outer and inner edges, there being a respective side bar for each said edge of each fin, the inner edge of each bar being disposed in contacting relationship to the corresponding fin edge, the outer edges of said bars and the edges of said sheets forming a flat, smooth surface on at least one of said opposite sides of said stack, said surface having a heat source mounted thereon; and brazing means for interconnecting said fins, sheets and bars together for efficient heat conductivity.
Claim 3
Dependent Claim
14 words
A heat sink as set forth in claim 1 which is constructed of aluminum.
Claim 4
Dependent Claim
14 words
A heat sink as set forth in claim 1 which is constructed of copper.
Claim 5
Dependent Claim
15 words
A heat sink as set forth in claim 1 which is constructed of stainless steel.
Claim 6
Dependent Claim
16 words
A heat sink as set forth in claim 1 wherein said surface is a machined surfaced.
References Cited (Backward Citations)
US2416152A
Cited
FR1323991A
Cited
FR1355802A
Cited
US3327776A
Cited
US3833837A
Cited
DE2460631A1
Cited
US4027206A
Cited
US4022272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |