Patent US4365665A successfully refreshed from Google Patents.
US4365665A
Expired / Lapsed
US
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Heat sink
Assignee: Sumitomo Precision Products Co Ltd
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Filing: 1981-03-20
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Granted: 1982-12-28
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Expires: 2001-03-20
Abstract
Abstract The invention involves to improvements in heat sink. 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
2026-11-02 03:58
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; H; H10; H10W; H10W40/00; H10W40/20; H10W40/22; H10W40/226; H10W40/60; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12292; Y10T428/1234; Y10T428/12375
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
An improved heat sink comprising: a plurality of continuous corrugated fins which each have opposed end edges; a plurality of separator sheets having end edges at opposite sides thereof, the end edges of said sheets being spaced further apart than said end edges of said fins, said fins and said sheets being stacked in alternating relationship with said end edges of all said corrugated fins and all of said sheets positioned on opposite sides of the stack, the end edges of each of said corrugated fins being disposed inwardly of the stack relative to the end edges of all of said sheets; a plurality of side bars, each side bar having opposed outer and inner edges, there being a respective side bar for each said end edge of each said corrugated fin, the inner edge of each side bar being disposed in contacting relationship relative to the corresponding corrugated fin end edge, the outer edges of said side bars and the end edges of said sheets forming a flat, smooth surface on at least one of the opposite sides of the stack, said flat, smooth surface being adapted for having a heat source mounted thereon; and brazing means interconnecting said corrugated fins, separator sheets and side bars together for efficient heat conductivity.
Claim 2
Dependent Claim
212 words
An improved heat sink comprising: a plurality of continuous corrugated fins which each have opposed end edges; a plurality of separator sheets having end edges at opposite sides thereof, the end edges of said sheets being spaced further apart than said end edges of said fins, said fins and said sheets being stacked in alternating relationship with said end edges of all said corrugated fins and all of said sheets positioned on opposite sides of the stack, the end edges of each of said corrugated fins being disposed inwardly of the stack relative to the end edges of all of said sheets; a plurality of side bars, each side bar having opposed outer and inner edges, there being a respective side bar for each said end edge of each said corrugated fin, the inner edge of each side bar being disposed in contacting relationship relative to the corresponding corrugated fin end edge, the outer edges of said side bars and the end edges of said sheets forming a flat, smooth surface on at least one of the opposite sides of the stack, said flat, smooth surface being adapted for having a heat source mounted thereon; and brazing means interconnecting said corrugated fins, separator sheets and side 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.
Claim 7
Dependent Claim
26 words
A heat sink as set forth in claim 1 wherein each separator sheet extends in a continuous fashion from one opposite end edge to the other.
Claim 8
Dependent Claim
18 words
A heat sink as set forth in claim 6 wherein each separator sheet consists of a brazing sheet.
Claim 9
Dependent Claim
104 words
A heat sink as set forth in claim 1 wherein each of said side bars is box shaped, wherein the outer and inner edges of each box-shaped side bar consists of flat sides, the inner flat side of each box-shaped side bar facing the end edge of an adjacent corrugated fin, wherein the portion of each corrugated fin adjacent its opposite end edge is flat and extends in parallel with the flat inner side of the adjacent box-shaped side bar, and wherein brazing means continuously interconnects each said flat portion of each corrugated fin to the inner side of the adjacent box-shaped side bar.
Claim 10
Dependent Claim
44 words
A heat sink as set forth in claim 8 wherein each box-shaped side bar includes opposite flat sides which face an adjacent separator sheet, and wherein brazing means continuously interconnects each said flat side facing an adjacent separator sheet to the adjacent separator sheet.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |