# US 10,480,670 B2 · Valve element and fluid control valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,670 B2 - Document ID: US10480670B2 - Status: Granted - Kind: B2 - Application number: 15/481,294 - Filed: 2017-04-06 - Published: 2017-10-12 - Granted: 2019-11-19 - Earliest claimed: 2016-04-07 - Assignees: HORIBA STEC, Co., Ltd. - Applicants: HORIBA STEC, Co., Ltd. - Inventors: Shigeyuki Hayashi; Kazuya Shakudo - Web page: https://patentgrep.com/patent/US10480670B2 ## CPC - F16K 27/02: of lift valves (for reducing the flow resistance of screw-spindle lift-valves F16K1/06) - F16K 1/36: Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) - F16K 1/44: Details of seats or valve members of double-seat valves - F16K 25/005: {Particular materials for seats or closure elements} - F16K 31/007: {Piezoelectric stacks} - G05D 7/0629: {characterised by the type of regulator means} - G05D 7/0635: {by action on throttling means (G05D7/0688, G05D7/0694 take precedence)} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES ## Abstract In order to provide a fluid control valve less likely to cause contamination, and a fluid control apparatus using the fluid control valve, at least any one of a valve seat member and a valve body member is one including a base body made of metal; and a resin layer that covers the surface of the base body to form a valve seat surface or a seating surface, in which the resin layer is directly chemically bonded to the base body. ## Claims ### Claim 1 A fluid control valve comprising: a valve seat member formed with a valve seat surface; and a valve body member formed with a seating surface seated on the valve seat surface, and configured to control a flow of a fluid by separating or contacting the valve seat surface and the seating surface from or with each other, wherein at least one of the valve seat member and the valve body member comprises: a base body made of a metal material; and a single resin layer that covers a bottom surface of a concave portion of the base body, a front surface of the resin layer forms a part or a whole of the valve seat surface or the seating surface, and a rear surface of the resin layer is directly bonded to and forms a covalent bond with the metal material of the base body, and the resin layer is formed of a crosslinked modified fluorine-based resin. ### Claim 2 (depends on 1) The fluid control valve according to claim 1, wherein a top surface of the base body is formed with a groove or a hole through which the fluid circulates, and the resin layer is formed so as to not be formed inside the groove or the hole. ### Claim 3 (depends on 1) The fluid control valve according to claim 1, wherein the valve seat member or the valve body member is driven by a driving mechanism utilizing extension and contraction motions of a piezoelectric element, and the valve seat surface and the seating surface are thereby separated from or contacted with each other. ### Claim 4 (depends on 1) The fluid control valve according to claim 1, wherein the crosslinked modified fluorine-based resin is obtained by crosslinking and modifying a copolymer obtained by using one or by mixing two or more selected from a tetrafluoroethylene copolymer, a tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer, a tetrafluoroethylene-hexafluoropropylene copolymer, a tetrafluoroethylene-ethylene copolymer, or a polychlorotrifluoroethylene copolymer. ### Claim 5 (depends on 1) A fluid control apparatus comprising the fluid control valve according to claim 1. ### Claim 6 A fluid control valve comprising: a valve seat member formed with a valve seat surface on a surface thereof; and a valve body member formed, on a surface thereof, with a seating surface seated on the valve seat surface, and configured to control a flow of a fluid by separating or contacting the valve seat surface and the seating surface from or with each other, wherein at least one of the valve seat member and the valve body member comprises: a base body made of a metal material; and a single resin layer that covers a bottom surface of a concave portion of the base body, a front surface of the resin layer forms a part or a whole of the valve seat surface or the seating surface, and a rear surface of the resin layer is directly bonded to and forms a covalent bond with the metal material of the base body. ### Claim 7 (depends on 6) The fluid control valve according to claim 6, wherein a top surface of the base body is formed with a groove or a hole through which the fluid circulates, and the resin layer is formed so as to not be formed inside the groove or the hole. ### Claim 8 (depends on 6) The fluid control valve according to claim 6, wherein the valve seat member or the valve body member is driven by a driving mechanism utilizing extension and contraction motions of a piezoelectric element, and the valve seat surface and the seating surface are thereby separated from or contacted with each other. ### Claim 9 (depends on 6) A fluid control apparatus comprising the fluid control valve according to claim 6.