Patents by Inventor Tatsuya Okumura
Tatsuya Okumura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240091755Abstract: In a photocatalyst which is obtained by adding a co-catalyst to semiconductor particles containing strontium titanate and which causes a water decomposition reaction in which water molecules are decomposed into oxygen molecules and hydrogen molecules according to light emission, the semiconductor particles are doped with barium or additionally with scandium. A method of synthesizing a semiconductor for the photocatalyst includes a process of synthesizing semiconductor particles containing strontium titanate doped with barium by mixing barium titanate or additionally with scandium oxide into strontium chloride or mixing strontium titanate or additionally scandium oxide into strontium chloride and barium chloride and performing firing.Type: ApplicationFiled: September 11, 2023Publication date: March 21, 2024Inventors: Taizo MASUDA, Ryota TOMIZAWA, Kenichi OKUMURA, Tatsuya HASEGAWA, Shigeru IKEDA
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Patent number: 11467121Abstract: Disclosed is a manufacturing method of a gas sensor. The gas sensor has a plate-shaped sensor element with at least one pair of electrode pads, a separator disposed around the sensor element, and at least one pair of opposed metal terminals held in an insertion hole of the separator and electrically connected at contact regions thereof to the respective electrode pads. The manufacturing method includes mounting the metal terminals in the insertion hole of the separator with use of a mounting jig. The mounting jig has a flat portion interposed between the contact regions of the metal terminals during the mounting of the metal terminals in the separator so as to prevent contact and entanglement of the opposed metal terminals.Type: GrantFiled: September 30, 2020Date of Patent: October 11, 2022Assignee: NGK SPARK PLUG CO., LTD.Inventors: Takehiro Oba, Tatsuya Okumura
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Publication number: 20210018462Abstract: Disclosed is a manufacturing method of a gas sensor. The gas sensor has a plate-shaped sensor element with at least one pair of electrode pads, a separator disposed around the sensor element, and at least one pair of opposed metal terminals held in an insertion hole of the separator and electrically connected at contact regions thereof to the respective electrode pads. The manufacturing method includes mounting the metal terminals in the insertion hole of the separator with use of a mounting jig. The mounting jig has a flat portion interposed between the contact regions of the metal terminals during the mounting of the metal terminals in the separator so as to prevent contact and entanglement of the opposed metal terminals.Type: ApplicationFiled: September 30, 2020Publication date: January 21, 2021Applicant: NGK SPARK PLUG CO., LTD.Inventors: Takehiro OBA, Tatsuya Okumura
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Patent number: 10876995Abstract: Disclosed is a manufacturing method of a gas sensor. The gas sensor has a plate-shaped sensor element with at least one pair of electrode pads, a separator disposed around the sensor element, and at least one pair of opposed metal terminals held in an insertion hole of the separator and electrically connected at contact regions thereof to the respective electrode pads. The manufacturing method includes mounting the metal terminals in the insertion hole of the separator with the use of a mounting jig. The mounting jig has a flat portion interposed between the contact regions of the metal terminals during the mounting of the metal terminals in the separator so as to prevent contact and entanglement of the opposed metal terminals.Type: GrantFiled: May 4, 2018Date of Patent: December 29, 2020Assignee: NGK SPARK PLUG CO., LTD.Inventors: Takehiro Oba, Tatsuya Okumura
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Publication number: 20190004007Abstract: Disclosed is a manufacturing method of a gas sensor. The gas sensor has a plate-shaped sensor element with at least one pair of electrode pads, a separator disposed around the sensor element, and at least one pair of opposed metal terminals held in an insertion hole of the separator and electrically connected at contact regions thereof to the respective electrode pads. The manufacturing method includes mounting the metal terminals in the insertion hole of the separator with the use of a mounting jig. The mounting jig has a flat portion interposed between the contact regions of the metal terminals during the mounting of the metal terminals in the separator so as to prevent contact and entanglement of the opposed metal terminals.Type: ApplicationFiled: May 4, 2018Publication date: January 3, 2019Applicant: NGK SPARK PLUG CO., LTD.Inventors: Takehiro OBA, Tatsuya OKUMURA
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Patent number: 9151728Abstract: Provided is a gas sensor in which a connection terminal can be favorably fitted onto a cylindrical sensor element without causing a breakage of the connection terminal. An oxygen sensor (1) includes an outer connection terminal (29) having an outer fitting portion (53), an extension portion (55) extending inwardly from an axially intermediate point of the outer fitting portion (53) and pulling prevention portions (75) and (77) formed on rear end parts of the outer fitting portion (53) at positions adjacent to the extension portion (55). When the extension portion (55) of the outer connection terminal (29) is inserted in and pulled out from a through hole (23) of a separator (27), the extension portion (55) can be prevented from further pulling in the through hole (23) by contact of the pulling prevention portions (75) and (77) with a front end surface of the separator (27).Type: GrantFiled: December 6, 2011Date of Patent: October 6, 2015Assignee: NGK SPARK PLUG CO., LTD.Inventors: Hidekazu Kato, Tatsuya Okumura, Masahiro Asai, Tomoyuki Miyashita
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Publication number: 20120304735Abstract: Provided is a gas sensor in which a connection terminal can be favorably fitted onto a cylindrical sensor element without causing a breakage of the connection terminal. An oxygen sensor (1) includes an outer connection terminal (29) having an outer fitting portion (53), an extension portion (55) extending inwardly from an axially intermediate point of the outer fitting portion (53) and pulling prevention portions (75) and (77) formed on rear end parts of the outer fitting portion (53) at positions adjacent to the extension portion (55). When the extension portion (55) of the outer connection terminal (29) is inserted in and pulled out from a through hole (23) of a separator (27), the extension portion (55) can be prevented from further pulling in the through hole (23) by contact of the pulling prevention portions (75) and (77) with a front end surface of the separator (27).Type: ApplicationFiled: December 6, 2011Publication date: December 6, 2012Applicant: NGK SPARK PLUG CO., LTD.Inventors: Hidekazu Kato, Tatsuya Okumura, Masahiro Asai, Tomoyuki Miyashita
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Patent number: 7758736Abstract: A detecting element (10) of a gas sensor (1) is held with a detecting portion (11) projecting from a front-end engaging-portion (56) of a metallic shell (50) and is accommodated for protection in an inner protector (120) in a gas detection chamber (129). Exhaust gas introduced into the gas detection chamber (129) is exhausted through an exhaust hole (160). The exhaust hole is formed by cutting off a portion of a side wall (127) of a recess portion (125), which is formed by pressing inward a portion between two slits formed in a front end wall (124). A bottom wall (126) of the recess portion (125) is located frontward of the detecting element (10) with respect to the direction of an axis O, thereby preventing a water droplet which comes flying from the outside from directly contacting the detecting element (10).Type: GrantFiled: August 27, 2007Date of Patent: July 20, 2010Assignee: NGK Spark Plug Co., Ltd.Inventors: Tatsuya Okumura, Satoshi Ishikawa, Takehiro Oba, Tomohiko Funahashi
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Patent number: 7542847Abstract: A map display device having a corridor function includes a control unit and display unit. In the corridor function, the control unit clips a part of map data corresponding to a region, which includes a reference point at a central part of the region, and stores the part of map data in a memory; the display unit displays a map of the region based on the stored part of map data.Type: GrantFiled: March 28, 2006Date of Patent: June 2, 2009Assignee: Denso CorporationInventor: Tatsuya Okumura
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Patent number: 7415877Abstract: To provide a gas sensor in which connection terminals are stably brought into contact with electrode terminal portions of a sensor element without superfluous load applied on the sensor element. A pair of element guide portions 33 are provided in a sleeve 30 in which a plate-like sensor element 10 is inserted. The pair of element guide portions 33 protrude from an opening end surface on a rear end side of an axial hole 31, store either of widthwise opposite side ends of the sensor element 10 and restrain the sensor element 10 from being inclined. The sensor element 10 is positioned coaxially with the sleeve 30 by the element guide portions 33. Electrode holders 40 in which electrode fitments 60 are held are fitted to the element guide portions 33 so that the electrode fitments 60 are brought into contact with electrode terminal portions 15 and 16 of the sensor element 10.Type: GrantFiled: March 18, 2005Date of Patent: August 26, 2008Assignee: NGK Spark Plug Co., Ltd.Inventors: Tatsuya Okumura, Tomohiro Nakamura
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Patent number: 7371092Abstract: In a waterproof connector (1), a filter (151), which is impermeable to liquid and permeable to air, is arranged between an outer circumferential surface of an insulating coating layer (13) of a first electric wire (11) and a wall surface of the first hole (33). On the other hand, a seal member (51), which is impermeable to liquid and air, is arranged between an outer circumferential surface of an insulating coating layer (313) of a second electric wire (311) and a wall surface of the second hole (313).Type: GrantFiled: July 10, 2007Date of Patent: May 13, 2008Assignee: NGK Spark Plug Co., Ltd.Inventors: Tatsuya Okumura, Tomohiro Nakamura, Tomohiko Funahashi
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Publication number: 20080067066Abstract: A detecting element (10) of a gas sensor (1) is held with a detecting portion (11) projecting from a front-end engaging-portion (56) of a metallic shell (50) and is accommodated for protection in an inner protector (120) in a gas detection chamber (129). Exhaust gas introduced into the gas detection chamber (129) is exhausted through an exhaust hole (160). The exhaust hole is formed by cutting off a portion of a side wall (127) of a recess portion (125), which is formed by pressing inward a portion between two slits formed in a front end wall (124). A bottom wall (126) of the recess portion (125) is located frontward of the detecting element (10) with respect to the direction of an axis O, thereby preventing a water droplet which comes flying from the outside from directly contacting the detecting element (10).Type: ApplicationFiled: August 27, 2007Publication date: March 20, 2008Applicant: NGK SPARK PLUG CO., LTD.Inventors: Tatsuya Okumura, Satoshi Ishikawa, Takehiro Oba, Tomohiko Funahashi
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Publication number: 20080014793Abstract: In a waterproof connector (1), a filter (151), which is impermeable to liquid and permeable to air, is arranged between an outer circumferential surface of an insulating coating layer (13) of a first electric wire (11) and a wall surface of the first hole (33). On the other hand, a seal member (51), which is impermeable to liquid and air, is arranged between an outer circumferential surface of an insulating coating layer (313) of a second electric wire (311) and a wall surface of the second hole (313).Type: ApplicationFiled: July 10, 2007Publication date: January 17, 2008Applicant: NGK SPARK PLUG CO., LTD.Inventors: Tatsuya Okumura, Tomohiro Nakamura, Tomohiko Funahashi
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Publication number: 20060288759Abstract: To provide a gas sensor in which connection terminals are stably brought into contact with electrode terminal portions of a sensor element without superfluous load applied on the sensor element. A pair of element guide portions 33 are provided in a sleeve 30 in which a plate-like sensor element 10 is inserted. The pair of element guide portions 33 protrude from an opening end surface on a rear end side of an axial hole 31, store either of widthwise opposite side ends of the sensor element 10 and restrain the sensor element 10 from being inclined. The sensor element 10 is positioned coaxially with the sleeve 30 by the element guide portions 33. Electrode holders 40 in which electrode fitments 60 are held are fitted to the element guide portions 33 so that the electrode fitments 60 are brought into contact with electrode terminal portions 15 and 16 of the sensor element 10.Type: ApplicationFiled: March 18, 2005Publication date: December 28, 2006Inventors: Tatsuya Okumura, Tomohiro Nakamura
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Publication number: 20060224315Abstract: A map display device having a corridor function includes a control unit and display unit. In the corridor function, the control unit clips a part of map data corresponding to a region, which includes a reference point at a central part of the region, and stores the part of map data in a memory; the display unit displays a map of the region based on the stored part of map data.Type: ApplicationFiled: March 28, 2006Publication date: October 5, 2006Applicant: DENSO CORPORATIONInventor: Tatsuya Okumura
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Patent number: 6034183Abstract: A process for preparing polymers having quaternary ammonium groups comprising polymerizing a vinyl monomer component containing a vinyl monomer having a tertiary amino group in the presence of a specific solvent, while quaternizing the tertiary amino group with a quaternizing agent, to produce the vinyl polymers having quaternary ammonium groups in the form of particles dispersed in the solvent, which is possible to easily separate the produced polymers having quaternary ammonium groups from the solvent without requiring a heating step for removing the solvent, and which can produce quaternary ammonium group-containing copolymers having a high content of a hydrophobic vinyl monomer. The quaternary ammonium group-containing copolymers obtained by this process are useful as modifier for plastics, permanent antistatic agent, bactericide or fungicide, chemicals for paper making and water treating agent.Type: GrantFiled: June 8, 1998Date of Patent: March 7, 2000Assignee: Arakawa Chemical Industries, Ltd.Inventors: Tatsuya Okumura, Jiro Mizuya, Junji Shiigi
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Patent number: 5679226Abstract: An oxygen sensor includes a tubular metal shell, a tubular housing having an end attached to the metal shell and another end sealed by a seal member. A solid electrolyte tube is attached to the metal shell and has on inner and outer surfaces thereof electrode layers and lead layers connected to the electrode layers, respectively. A pair of lead wires extend through the seal member between inside and outside of a housing assembly constituted by the metal shell and housing while being sealingly held by the seal member. A pair of metallic leads are disposed inside of the housing assembly for connection between the lead layers and the lead wires, the metallic leads having at one end thereof electrode connecting portions having a spring property, the electrode connecting portions being attached to the inner and outer surfaces of the solid electrolyte tube and held in contact with the lead layers under spring pressure.Type: GrantFiled: September 14, 1995Date of Patent: October 21, 1997Assignee: NGK Spark Plug Co, Ltd.Inventors: Keizo Furusaki, Tatsuya Okumura, Hideya Tanaka, Yasuhiro Yamada
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Patent number: 5330582Abstract: A cleaning method for removing a rosin-base solder flux, the method including bringing a cleaning agent into contact with the flux on a printed wiring board, the cleaning agent including a mixture of(A) at least one glycol ether compound represented by the formula ##STR1## wherein R.sup.1 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R.sup.2 is an alkyl group having 1 to 5 carbon atoms, R.sup.3 is a hydrogen atom or a methyl group and n is an integer of 2 to 4, and(B) at least one nonionic surfactant.Type: GrantFiled: July 19, 1993Date of Patent: July 19, 1994Assignee: Arakawa Chemical Industries, Ltd.Inventors: Machio Chihara, Jiro Mizuya, Tatsuya Okumura, Takashi Tanaka
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Patent number: D1016020Type: GrantFiled: October 18, 2021Date of Patent: February 27, 2024Assignee: SMK CorporationInventors: Tatsuya Ishikawa, Shinya Okumura
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Patent number: D1021807Type: GrantFiled: October 18, 2021Date of Patent: April 9, 2024Assignee: SMK CorporationInventors: Tatsuya Ishikawa, Shinya Okumura