# US 10,770,867 B2 · Arrester > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,867 B2 - Document ID: US10770867B2 - Status: Granted - Kind: B2 - Application number: 16/626,470 - Filed: 2018-06-26 - Published: 2020-06-11 - Granted: 2020-09-08 - Earliest claimed: 2017-07-05 - Assignees: TDK Electronics Co., Ltd. - Applicants: TDK Electronics AG - Inventors: Torsten Klinger; Zhipeng Fang; Frank Werner - Web page: https://patentgrep.com/patent/US10770867B2 ## CPC - H01T 4/12: hermetically sealed - H01T 1/20: Means for starting arc or facilitating ignition of spark gap - H01T 4/02: Details - H01T: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H) ## Abstract An arrester is disclosed. In an embodiment an arrester includes at least one first and one second electrode, a ceramic body for electrical isolation of the electrodes, wherein the electrodes are spaced by a distance from one another in a direction of a transverse axis of the arrester, and wherein the distance between the electrodes varies along a longitudinal axis of the arrester. ## Claims ### Claim 1 An arrester comprising: at least one first and one second electrode; a ceramic body for electrical isolation of the first and second electrodes, wherein the first and second electrodes are spaced by a distance from one another in a direction of a transverse axis of the arrester, wherein the distance between the first and second electrodes varies along a longitudinal axis of the arrester, wherein each of the first and second electrodes has a central recess, and wherein the central recesses are formed mutually opposite around the longitudinal axis of the arrester; and a third electrode arranged between the first and second electrodes, wherein the third electrode does not have a recess. ### Claim 2 (depends on 1) The arrester according to claim 1, wherein the distance between the first and second electrodes is at its maximum in a region of the central recesses. ### Claim 3 (depends on 1) The arrester according to claim 1, wherein the first and second electrodes and/or the first and third electrodes and/or the second and third electrode exhibit a minimum distance from one another in a direction of the transverse axis of the arrester. ### Claim 4 (depends on 3) The arrester according to claim 3, wherein at least one arc ignition region is arranged in a region of the minimum distance. ### Claim 5 (depends on 3) The arrester according to claim 3, wherein each of the first electrode and the second electrode has at least one convexity, and wherein the minimum distance between the first and second electrodes is formed in a region of the convexity. ### Claim 6 (depends on 1) The arrester according to claim 1, wherein each central recess has a diameter, wherein each of the first and second electrodes has an internal diameter, wherein 0.7≤(D2/D1)·A≤1.3, and wherein A is a minimum distance between the third electrode and the first and second electrodes, D1 is the diameter of the central recess and D2 is the internal diameter. ### Claim 7 (depends on 1) The arrester according to claim 1, wherein the first and second electrodes and the ceramic body enclose a cavity filled with a noble gas, and wherein the arrester is a gas discharge surge arrester. ### Claim 8 (depends on 1) The arrester according to claim 1, wherein the arrester has at least one arc ignition region and at least one arc burning region, and wherein the arc ignition region and the arc burning region are separated spatially from one another. ### Claim 9 (depends on 8) The arrester according to claim 8, wherein the arc burning region is arranged in a region between central recesses. ### Claim 10 (depends on 8) The arrester according to claim 8, further comprising an activation material arranged in the arc burning region. ### Claim 11 An arrester comprising: at least one first electrode and one second electrode; a ceramic body for electrical isolation of the first and second electrodes, wherein the first and second electrodes are spaced by a distance from one another in a direction of a transverse axis of the arrester, wherein the distance between the first and second electrodes varies along a longitudinal axis of the arrester, wherein each electrode has a central recess, and wherein the central recesses of the electrodes are formed mutually opposite around the longitudinal axis of the arrester; and a third electrode arranged between the first and second electrodes, wherein the third electrode does not have a recess, wherein each central recess has a diameter, wherein each of the first and second electrodes has an internal diameter, wherein 0.7≤(D2/D1)·A≤1.3, and wherein A is a minimum distance between the third electrode and the first and second electrodes, D1 is the diameter of the central recess and D2 is the internal diameter. ### Claim 12 (depends on 11) The arrester according to claim 11, wherein the distance between the first and second electrodes is at its maximum in a region of the central recesses. ### Claim 13 (depends on 11) The arrester according to claim 11, wherein the first and second electrodes and/or the first and third electrodes and/or the second and third electrode exhibit a minimum distance from one another in a direction of the transverse axis of the arrester. ### Claim 14 (depends on 13) The arrester according to claim 13, wherein at least one arc ignition region is arranged in a region of the minimum distance. ### Claim 15 (depends on 13) The arrester according to claim 13, wherein each of the first electrode and the second electrode has at least one convexity, and wherein the minimum distance between the first and second electrodes is formed in a region of the convexity. ### Claim 16 (depends on 11) The arrester according to claim 11, wherein the first and second electrodes and the ceramic body enclose a cavity filled with a noble gas, and wherein the arrester is a gas discharge surge arrester. ### Claim 17 (depends on 11) The arrester according to claim 11, wherein the arrester has at least one arc ignition region and at least one arc burning region, and wherein the arc ignition region and the arc burning region are separated spatially from one another. ### Claim 18 (depends on 17) The arrester according to claim 17, wherein the arc burning region is arranged in a region between central recesses. ### Claim 19 (depends on 17) The arrester according to claim 17, further comprising an activation material arranged in the arc burning region.