# US 8,464,780 B2 · Heat sink with heat pipes and method for manufacturing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,464,780 B2
- Document ID: US8464780B2
- Status: Granted
- Kind: B2
- Application number: 12/907,591
- Filed: 2010-10-19
- Published: 2011-02-10
- Granted: 2013-06-18
- Earliest claimed: 2003-09-12
- Assignees: Furukawa Electric Co., Ltd.
- Applicants: Kenya Kawabata; Masaru Oomi; Ryoji Ohno
- Inventors: Kenya Kawabata; Masaru Oomi; Ryoji Ohno
- Web page: https://patentgrep.com/patent/US8464780B2

## CPC

- F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence)}
- F28D 15/0275: {Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores}
- F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)

## Abstract

A heat sink to be used with a heat source can include a base portion and a fin portion. The base portion can include a plurality of heat pipes and a space formed at least partially between adjacent heat pipes. The base portion can also include a first plate thermally connected to the heat source and a second plate thermally connected to the fin portion. The plurality of heat pipes contacts the first plate and the second plate. The plurality of heat pipes can also include a first portion that is closer than a second portion to the heat source. Additionally, a distance between adjacent heat pipes is smaller at the first portion than at the second portion.

## Claims

### Claim 1

A heat sink for dissipating heat from a heat source, comprising:
a base portion having inside thereof at least one heat pipe, a space formed around part of a peripheral portion of said heat pipe, and a metal block; and
a fin portion externally and thermally connected to said base portion;
wherein said base portion comprises a first plate member thermally connected to the heat source, and a second plate member thermally connected to said fin portion; and
said at least one heat pipe and said metal block are placed between said first plate member and said second plate member, and are thermally connected to said first plate member and said second plate member;
wherein said metal block is arranged only in a. portion of said first plate member which is connected to said heat source.

### Claim 2 (depends on 1)

The heat sink as claimed in claim 1, wherein:
said first plate member comprises a U-shaped plate member including side wall portions and a bottom surface portion; and
said second plate comprises a flat plate member being a top surface portion.

### Claim 3 (depends on 1)

The heat sink as claimed in claim 1, wherein:
said first plate member comprises a flat plate member being a bottom surface portion; and
said second plate member comprises a U-shaped plate member including side wall portions and a top surface portion.

### Claim 4 (depends on 1)

The heat sink as claimed in claim 1, wherein said metal block is formed integrally with said first plate member.

### Claim 5 (depends on 1)

The heat sink as claimed in claim 1, wherein said metal block is arranged between said heat pipes and is connected to part of each heat pipe.