# US 11,910,569 B2 · Heat sink and heat dissipation device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,569 B2 - Document ID: US11910569B2 - Status: Granted - Kind: B2 - Application number: 17/167,041 - Filed: 2021-02-03 - Published: 2022-06-02 - Granted: 2024-02-20 - Earliest claimed: 2020-12-02 - Assignees: Cooler Master Co., Ltd. - Applicants: Cooler Master Co., Ltd. - Inventors: Yan-Sian Jheng - Web page: https://patentgrep.com/patent/US11910569B2 ## CPC - H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)} - H10W 40/43: by flowing gases, e.g. forced air cooling - H05K 7/20154: {Heat dissipaters coupled to components} - H10W 40/226: {characterised by projecting parts, e.g. fins to increase surface area (leadframes for cooling H10W70/461)} - G06F 1/20: Cooling means - H10W 40/611: {Bolts or screws} - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A heat sink is provided. The heat sink includes a cylindrical body and a plurality of fins. The fins are connected to and protruding from the cylindrical body. At least a part of the plurality of fins each include a first protrusion portion and a second protrusion portion, a distal edge of the first protrusion portion is located farther away from a central axis of the cylindrical body than a distal edge of the second protrusion portion. In addition, the disclosure also provides a heat dissipation device having the heat sink. ## Claims ### Claim 1 A heat sink, comprising: a cylindrical body; and a plurality of fins, connected to and protruding from the cylindrical body, wherein at least a part of the plurality of fins each comprise a first protrusion portion and a second protrusion portion, a distal edge of the first protrusion portion is located farther away from a central axis of the cylindrical body than a distal edge of the second protrusion portion; wherein the heat sink further comprises at least one first mount structure connected to the first protrusion portion of one of the part of the plurality of fins, and the at least one first mount structure is configured to be mounted to a circuit board; wherein the heat sink further comprises at least one second mount structure connected to the first protrusion portion of one of the part of the plurality of fins, and the at least one second mount structure is configured for an installation of an airflow generator; wherein each of the first mount structure and the second mount structure has an installation hole, and a center of the cylindrical body, a center of the installation hole of the first mount structure and a center of the installation hole of the second mount structure are located on a straight line to the central axis of the cylindrical body. ### Claim 2 (depends on 1) The heat sink according to claim 1, wherein all of the plurality of fins each comprise the first protrusion portion and the second protrusion portion. ### Claim 3 (depends on 1) The heat sink according to claim 1, wherein the other part of the plurality of fins each have a distal edge which is distanced from the central axis of the cylindrical body by a maximum distance equal to a maximum distance between the distal edge of the first protrusion portion and the central axis of the cylindrical body. ### Claim 4 (depends on 3) The heat sink according to claim 3, wherein the part of the plurality of fins each comprising the first protrusion portion and the second protrusion portion substantially occupies a range substantially equal to a half area of a circle formed by the plurality of fins. ### Claim 5 (depends on 1) The heat sink according to claim 1, wherein each of the plurality of fins is a flat plate. ### Claim 6 (depends on 1) The heat sink according to claim 1, wherein each of the plurality of fins is a curved plate. ### Claim 7 (depends on 1) The heat sink according to claim 1, wherein the cylindrical body and the plurality of fins are made of a single piece. ### Claim 8 (depends on 1) The heat sink according to claim 1, wherein a maximum distance between the distal edge of the second protrusion portion and the central axis of the cylindrical body ranges between 65% and 85% of a maximum distance between the distal edge of the first protrusion portion and the central axis of the cylindrical body. ### Claim 9 (depends on 1) The heat sink according to claim 1, wherein the part of the plurality of fins each further comprise a third protrusion portion, the second protrusion portion is located between and connected to the first protrusion portion and the third protrusion portion, a maximum distance between a distal edge of the third protrusion portion and the central axis of the cylindrical body is larger than a maximum distance between the distal edge of the second protrusion portion and the central axis of the cylindrical body. ### Claim 10 A heat sink, comprising: a cylindrical body; and a plurality of fins, connected to and protruding from the cylindrical body, wherein at least a part of the plurality of fins each comprise a first protrusion portion and a second protrusion portion, a distal edge of the first protrusion portion is located farther away from a central axis of the cylindrical body than a distal edge of the second protrusion portion; wherein the heat sink further comprises at least one first mount structure connected to the first protrusion portion of one of the part of the plurality of fins, and the at least one first mount structure is configured to be mounted to a circuit board; wherein the heat sink further comprises at least one second mount structure protruding from the distal edge of the first protrusion portion of one of the part of the plurality of fins, and the at least one second mount structure is configured for an installation of an airflow generator; wherein a length that the at least one second mount structure protrudes from the distal edge of the first protrusion portion is greater than a distance between the distal edge of the first protrusion portion and the distal edge of the second protrusion portion.