# US 10,121,569 B2 · Cable and explosion-proof system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,569 B2 - Document ID: US10121569B2 - Status: Granted - Kind: B2 - Application number: 15/684,963 - Filed: 2017-08-24 - Published: 2018-03-01 - Granted: 2018-11-06 - Earliest claimed: 2016-08-31 - Assignees: Kabushiki Kaisha Yaskawa Denki - Applicants: Kabushiki Kaisha Yaskawa Denki - Inventors: Naoyuki Otsubo; Tsuyoshi Ito; Kazunori Yamamoto - Web page: https://patentgrep.com/patent/US10121569B2 ## CPC - H01B 7/285: by completely or partially filling interstices in the cable - H01B 7/1875: {Multi-layer sheaths} - H01B 13/221: {filling-up interstices} - H02G 3/0412: {Heat or fire protective means (for fire in electric circuits A62C3/16)} - H02G 3/22: Installations of cables or lines through walls, floors or ceilings, e.g. into buildings - H01B 3/40: epoxy resins - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES ## Abstract A cable includes electric wires, an outer cover, a first cover, and a second cover. Each of the electric wires includes a conductive core and an insulator covering the conductive core. The outer cover covers the electric wires and extends from a first atmosphere to a second atmosphere less explosive than the first atmosphere. An outer surface of the outer cover is supported by a partition separating the first atmosphere from the second atmosphere. The first cover includes a thermosetting resin and covers an exposed portion of the electric wires, which is not covered by the outer cover in the second atmosphere. The second cover covers the first cover and includes a material higher in fracture strength than the thermosetting resin. ## Claims ### Claim 1 A cable comprising: electric wires each of which includes a conductive core and an insulator covering the conductive core; an outer cover covering the electric wires and extending from a first atmosphere to a second atmosphere less explosive than the first atmosphere, an outer surface of the outer cover being supported by a partition separating the first atmosphere from the second atmosphere; a first cover comprising a thermosetting resin and covering an exposed portion of the electric wires, which is not covered by the outer cover in the second atmosphere; and a second cover covering the first cover and comprising a material higher in fracture strength than the thermosetting resin. ### Claim 2 (depends on 1) The cable according to claim 1, wherein the thermosetting resin of the first cover comprises an epoxy resin. ### Claim 3 (depends on 1) The cable according to claim 1, wherein the second cover comprises a through portion through which the electric wires and the outer cover are passed, and a pressure portion pressing an outer surface of the outer cover. ### Claim 4 (depends on 1) The cable according to claim 1, wherein the second cover comprises at least one of a depression and a protrusion on an inner surface of the second cover, the at least one of the depression and the protrusion being in contact with the first cover. ### Claim 5 (depends on 1) The cable according to claim 1, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 6 (depends on 1) The cable according to claim 1, wherein the second cover is fixed to the partition. ### Claim 7 (depends on 1) The cable according to claim 1, wherein the second cover is integral to another second cover of another cable. ### Claim 8 An explosion-proof system comprising: a cable comprising: electric wires each of which comprising a conductive core and an insulator covering the conductive core; an outer cover covering the electric wires, the outer cover extending from a first atmosphere to a second atmosphere less explosive than the first atmosphere; and a partition supporting an outer surface of the outer cover and separating the first atmosphere from the second atmosphere; a first cover comprising a thermosetting resin and covering an exposed portion of the electric wires not covered by the outer cover; and a second cover covering the first cover and comprising a material higher in fracture strength than the thermosetting resin; and an explosion-proof machine which comprises the second atmosphere inside the explosion-proof machine and through which the cable is passed via the partition to separate the second atmosphere inside the explosion-proof machine from the first atmosphere. ### Claim 9 (depends on 8) The explosion-proof system according to claim 8, wherein the explosion-proof machine comprises a coating robot. ### Claim 10 A cable comprising: electric wires each of which comprising a conductive core and an insulator covering the conductive core; an outer cover covering the electric wires, the outer cover being supported by a support; a thermosetting resin covering an exposed portion of the electric wires not covered by the outer cover; and a metal covering the thermosetting resin. ### Claim 11 (depends on 2) The cable according to claim 2, wherein the second cover comprises a through portion through which the electric wires and the outer cover are passed, and a pressure portion pressing an outer surface of the outer cover. ### Claim 12 (depends on 2) The cable according to claim 2, wherein the second cover comprises at least one of a depression and a protrusion on an inner surface of the second cover, the at least one of the depression and the protrusion being in contact with the first cover. ### Claim 13 (depends on 3) The cable according to claim 3, wherein the second cover comprises at least one of a depression and a protrusion on an inner surface of the second cover, the at least one of the depression and the protrusion being in contact with the first cover. ### Claim 14 (depends on 11) The cable according to claim 11, wherein the second cover comprises at least one of a depression and a protrusion on an inner surface of the second cover, the at least one of the depression and the protrusion being in contact with the first cover. ### Claim 15 (depends on 2) The cable according to claim 2, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 16 (depends on 3) The cable according to claim 3, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 17 (depends on 4) The cable according to claim 4, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 18 (depends on 11) The cable according to claim 11, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 19 (depends on 12) The cable according to claim 12, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover. ### Claim 20 (depends on 13) The cable according to claim 13, wherein the exposed portion of the electric wires covered by the first cover is located at an end portion of the outer cover and/or at an intermediate portion of the outer cover.