# US 2019/0376748 A1 · Heat pipe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376748 A1 - Document ID: US20190376748A1 - Status: Published application - Kind: A1 - Application number: 16/549,895 - Filed: 2019-08-23 - Published: 2019-12-12 - Earliest claimed: 2014-11-28 - Assignees: Delta Electronics, Inc. - Applicants: Delta Electronics, Inc. - Inventors: Shih-Lin HUANG; Chiu-Kung CHEN; Sheng-Hua LUO; Ti-Jun WANG - Web page: https://patentgrep.com/patent/US20190376748A1 ## CPC - F28D 15/046: {characterised by the material or the construction of the capillary structure} - F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take 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) ## Abstract A heat pipe comprises a tube and a wick structure. The tube includes a hollow chamber and has two sealed ends along an axial direction. The wick structure is disposed in the hollow chamber and extended along the axial direction of the tube. The wick structure has a first section near one of the sealed ends, a third section near the other of the sealed ends, and a second section between the first and third sections. The second section is greater than the first and third sections. ## Claims ### Claim 1 A heat pipe, comprising: a tube including a hollow chamber and having two sealed ends along an axial direction; and a wick structure disposed in the hollow chamber and extended along the axial direction of the tube, wherein the wick structure has a first section near one of the sealed ends, a third section near the other of the sealed ends, and a second section between the first and third sections; and the second section is greater than the first and third sections. ### Claim 2 (depends on 1) The heat pipe as recited in claim 1, wherein the tube is cylindrical, elliptic or rectangular. ### Claim 3 (depends on 1) The heat pipe as recited in claim 1, wherein the sections of the wick structure along the axial direction of the tube have a continuous edge. ### Claim 4 (depends on 1) The heat pipe as recited in claim 1, wherein the sections of the wick structure along the axial direction of the tube have a discontinuous edge. ### Claim 5 (depends on 1) The heat pipe as recited in claim 1, wherein the wick structure includes at least a support portion pressing an inner wall of the tube. ### Claim 6 (depends on 1) The heat pipe as recited in claim 1, wherein the wick structure is disconnected to the two sealed ends of the tube in the axial direction, and a cross-sectional area of the wick structure in the axial direction is cross-shaped. ### Claim 7 (depends on 1) The heat pipe as recited in claim 1, wherein the wick structure has a center part thicker than two adjacent parts of the wick structure along a radial direction perpendicular to the axial direction, and the center part does not contact an upper wall of the tube. ### Claim 8 A heat pipe, comprising: a tube including a hollow chamber and having two sealed ends along an axial direction; and a wick structure disposed in the hollow chamber and extended along the axial direction of the tube, wherein the wick structure has a first section near one of the sealed ends, a third section near the other of the sealed ends, and a second section between the first and third sections; and the second section is less than the first and third sections. ### Claim 9 (depends on 8) The heat pipe as recited in claim 8, wherein the tube is cylindrical, elliptic or rectangular. ### Claim 10 (depends on 8) The heat pipe as recited in claim 8, wherein the sections of the wick structure along the axial direction of the tube have a continuous edge. ### Claim 11 (depends on 8) The heat pipe as recited in claim 8, wherein the sections of the wick structure along the axial direction of the tube have a discontinuous edge. ### Claim 12 (depends on 8) The heat pipe as recited in claim 8, wherein the wick structure includes at least a support portion pressing an inner wall of the tube. ### Claim 13 (depends on 8) The heat pipe as recited in claim 8, wherein the wick structure is disconnected to the two sealed ends of the tube in the axial direction, and a cross-sectional area of the wick structure in the axial direction is cross-shaped. ### Claim 14 A heat pipe, comprising: a tube including a hollow chamber and having two sealed ends along an axial direction; and a wick structure disposed in the hollow chamber and extended along the axial direction of the tube, wherein the wick structure has a first section near one of the sealed ends, a third section near the other of the sealed ends, and a second section between the first and third sections; and the first section is greater than the second section, and the second section is greater than the third section. ### Claim 15 (depends on 14) The heat pipe as recited in claim 14, wherein the tube is cylindrical, elliptic or rectangular. ### Claim 16 (depends on 14) The heat pipe as recited in claim 14, wherein the sections of the wick structure along the axial direction of the tube have a continuous edge. ### Claim 17 (depends on 14) The heat pipe as recited in claim 14, wherein the sections of the wick structure along the axial direction of the tube have a discontinuous edge. ### Claim 18 (depends on 14) The heat pipe as recited in claim 14, wherein the wick structure includes at least a support portion pressing an inner wall of the tube. ### Claim 19 (depends on 14) The heat pipe as recited in claim 14, wherein the wick structure is disconnected to the two sealed ends of the tube in the axial direction, and a cross-sectional area of the wick structure in the axial direction is cross-shaped.