Patents by Inventor Takashi Tokunaga
Takashi Tokunaga 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: 20230121726Abstract: Provided are: a semiconductor treatment liquid comprising high-purity isopropyl alcohol, wherein the concentration of the oxolane compound expressed in formula (1) below when held for 60 days in a nitrogen atmosphere at 50° C. in a SUS304 container is 25 ppb or less on a mass basis in relation to the isopropyl alcohol; and a method for manufacturing said semiconductor treatment liquid. In the formula, R1 and R2 each independently represent a hydrogen atom or a C1-3 alkyl group, and the total number of carbon atoms in R1 and R2 is 3 or less. R3 represents a hydrogen atom or an isopropyl group.Type: ApplicationFiled: March 30, 2021Publication date: April 20, 2023Applicant: TOKUYAMA CORPORATIONInventors: Masashi Shinagawa, Takashi Tokunaga, Yuu Mishima, Shunsuke Hosaka
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Patent number: 11552419Abstract: A floating connector comprises a movable housing, a plurality of contacts and at least one ground member. Each of the contacts has a fixed portion, a first held portion, a coupling portion, an extending portion and a contact portion. The coupling portion is resiliently deformable. The movable housing is movable within a predetermined range in a plane perpendicular to an up-down direction by the resilient deformation. The contacts include a plurality of ground contacts and a signal contact. The ground member has a plurality of ground contact portions, a plurality of supporting portions, a ground coupling portion and a second held portion. The ground contact portions correspond to the ground contacts, respectively. Each of the ground contact portions is brought into contact with the corresponding ground contact even when the movable housing is moved within the predetermined range. The ground coupling portion couples the supporting portions with each other.Type: GrantFiled: April 1, 2021Date of Patent: January 10, 2023Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke Obata, Takashi Tokunaga, Kiichi Hori
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Patent number: 11552420Abstract: A floating connector comprises a movable housing, a regulating member and a plurality of contacts. Each of the contacts is made of a single metal plate. Each of the contacts has a fixed portion, a regulated portion, a held portion, an extending portion, a contact portion and a coupling portion. The coupling portion is resiliently deformable. The movable housing is movable within a predetermined range in a plane perpendicular to an up-down direction by the resilient deformation of the coupling portion. The coupling portion has a first portion, a second portion and a bent portion. Each of the first portion and second portion has a principal surface. The principal surface of the first portion faces in a first direction. The principal surface of the second portion faces in a second direction. The first direction and the second direction are different from each other.Type: GrantFiled: April 29, 2021Date of Patent: January 10, 2023Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke Obata, Takashi Tokunaga, Kiichi Hori, Kazuki Takikawa, Hiroaki Obikane
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Patent number: 11431119Abstract: A floating connector is provided with a plurality of contacts, at least one stub member and a movable housing. The movable housing has a first holding portion and a second holding portion. The first holding portion holds first held portions of the contacts, and the second holding portion holds a second held portion of the stub member. The at least one stub member corresponds to at least one of the contacts in one-to-one correspondence. A stub contact point is always pressed against a coupling portion of the contact corresponding to the stub member even when the movable housing is moved within a predetermined range.Type: GrantFiled: April 1, 2021Date of Patent: August 30, 2022Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke Obata, Takashi Tokunaga, Kazuki Takikawa, Kiichi Hori
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Publication number: 20220021143Abstract: A floating connector comprises a movable housing, a regulating member and a plurality of contacts. Each of the contacts is made of a single metal plate. Each of the contacts has a fixed portion, a regulated portion, a held portion, an extending portion, a contact portion and a coupling portion. The coupling portion is resiliently deformable. The movable housing is movable within a predetermined range in a plane perpendicular to an up-down direction by the resilient deformation of the coupling portion. The coupling portion has a first portion, a second portion and a bent portion. Each of the first portion and second portion has a principal surface. The principal surface of the first portion faces in a first direction. The principal surface of the second portion faces in a second direction. The first direction and the second direction are different from each other.Type: ApplicationFiled: April 29, 2021Publication date: January 20, 2022Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke OBATA, Takashi TOKUNAGA, Kiichi HORI, Kazuki TAKIKAWA, Hiroaki OBIKANE
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Publication number: 20210376509Abstract: A floating connector is provided with a plurality of contacts, at least one stub member and a movable housing. The movable housing has a first holding portion and a second holding portion. The first holding portion holds first held portions of the contacts, and the second holding portion holds a second held portion of the stub member. The at least one stub member corresponds to at least one of the contacts in one-to-one correspondence. A stub contact point is always pressed against a coupling portion of the contact corresponding to the stub member even when the movable housing is moved within a predetermined range.Type: ApplicationFiled: April 1, 2021Publication date: December 2, 2021Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke OBATA, Takashi TOKUNAGA, Kazuki TAKIKAWA, Kiichi HORI
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Publication number: 20210376510Abstract: A floating connector comprises a movable housing, a plurality of contacts and at least one ground member. Each of the contacts has a fixed portion, a first held portion, a coupling portion, an extending portion and a contact portion. The coupling portion is resiliently deformable. The movable housing is movable within a predetermined range in a plane perpendicular to an up-down direction by the resilient deformation. The contacts include a plurality of ground contacts and a signal contact. The ground member has a plurality of ground contact portions, a plurality of supporting portions, a ground coupling portion and a second held portion. The ground contact portions correspond to the ground contacts, respectively. Each of the ground contact portions is brought into contact with the corresponding ground contact even when the movable housing is moved within the predetermined range. The ground coupling portion couples the supporting portions with each other.Type: ApplicationFiled: April 1, 2021Publication date: December 2, 2021Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Yusuke OBATA, Takashi TOKUNAGA, Kiichi HORI
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Patent number: 10680230Abstract: A battery includes: an electrode body; an electrode current collector; a sealing body; an external terminal; an electrical conductor connected to the external terminal; a deforming plate sealing an opening of the electrical conductor, electrically connected to the electrical conductor and to the current collector, and deformed when an internal pressure reaches a predetermined pressure; and a first insulator between the deforming plate and the current collector. The current collector includes a base, and a lead connecting to the electrode body. First to fourth fasteners fasten the base and the first insulator. Between the first and second fasteners, the base is electrically connected to the deforming plate. The second fastener is closer to the lead than the first fastener. The second fastener is closer to a connection between the deforming plate and the electrode current collector than a position of the first insulator supported toward the sealing body.Type: GrantFiled: March 20, 2018Date of Patent: June 9, 2020Assignees: SANYO Electric Co., Ltd., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichirou Yoshida, Hiroyuki Inoue, Eiji Okutani, Takashi Tokunaga, Toshihiro Takada, Takenori Tsuchiya
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Patent number: 10490958Abstract: A contact realizing excellent transmission of high-speed signals by reducing a transmission path length and electric influence of adjacent contacts. In a first housing disposed on a circuit board, a second housing is fitted for receiving a mating connector therein in a manner movable in a moving direction orthogonal to a receiving direction. Each contact includes a contact portion brought into contact with an associated mating contact of the mating connector, a connection portion connected to the circuit board, and an elastically deformable linking portion connecting the contact and connection portions. The second and first housings hold the contact and connection portions, respectively. A dimension A of the linking portion in the receiving direction and a dimension B of the linking portion in a front-rear direction orthogonal to both the receiving and contact arranging directions is set to e.g. A>B.Type: GrantFiled: March 17, 2015Date of Patent: November 26, 2019Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Shigeharu Aoki, Takashi Tokunaga
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Publication number: 20180277823Abstract: A battery includes: an electrode body; an electrode current collector; a sealing body; an external terminal; an electrical conductor connected to the external terminal; a deforming plate sealing an opening of the electrical conductor, electrically connected to the electrical conductor and to the current collector, and deformed when an internal pressure reaches a predetermined pressure; and a first insulator between the deforming plate and the current collector. The current collector includes a base, and a lead connecting to the electrode body. First to fourth fasteners fasten the base and the first insulator. Between the first and second fasteners, the base is electrically connected to the deforming plate. The second fastener is closer to the lead than the first fastener. The second fastener is closer to a connection between the deforming plate and the electrode current collector than a position of the first insulator supported toward the sealing body.Type: ApplicationFiled: March 20, 2018Publication date: September 27, 2018Applicants: SANYO Electric Co., Ltd., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichirou Yoshida, Hiroyuki Inoue, Eiji Okutani, Takashi Tokunaga, Toshihiro Takada, Takenori Tsuchiya
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Patent number: 10033140Abstract: A connector is attachable to a front end of a cable in a front-rear direction. The cable comprises coated signal cables and an outer member which protects the signal cables. The connector comprises terminals, a holding member, a shell, an assigned portion and an impedance adjusting portion. The terminals are attached to the signal cables, respectively, under an attached state where the connector is attached to the front end of the cable. The holding member holds the terminals. The shell covers the holding member to have a predetermined surface which intersects with a perpendicular direction perpendicular to the front-rear direction. The assigned portion is located on the outer member of the cable under the attached state. The impedance adjusting portion is located forward of the assigned portion in the front-rear direction and located inward in the perpendicular direction in comparison with both the predetermined surface and the assigned portion.Type: GrantFiled: June 13, 2017Date of Patent: July 24, 2018Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Hironori Kanda, Junichi Miyamoto, Masao Yamamoto, Takashi Tokunaga, Ryutaro Yamazaki, Hiroshi Kobayashi, Motoya Hara
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Patent number: 10026950Abstract: A prismatic secondary battery of one configuration has a current disconnection mechanism, and a distance from a first conductive member to a second conductive member along a surface of a first insulation member and passing an outer periphery of the first insulation member is greater than or equal to 2.4 mm. At least one of the first insulation member and a second insulation member is formed from a material having a weight reduction percentage of 100% in thermo gravimetric measurement under conditions of a measurement temperature of 25° C.-600° C., a temperature increase rate of 5° C.±0.5° C./min, a measurement atmosphere of inert gas flow, and an amount of measurement sample of 10 mg±5 mg.Type: GrantFiled: December 15, 2015Date of Patent: July 17, 2018Assignees: SANYO ELECTRIC CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshinori Yokoyama, Naoya Tada, Yasuhiro Yamauchi, Toshihiro Takada, Hiroshi Inukai, Yasushi Tsuchida, Takashi Tokunaga, Akira Kiyama
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Patent number: 9943910Abstract: A cutting tool composed of a sintered cermet body is disclosed. The body includes hard phases composed of carbide(s), nitride(s), and carbonitride(s) of metal(s) selected from metals belonging to Groups 4, 5, and 6 of the periodic table including Ti as a main component, and includes first and second hard phases, and a binding phase mainly composed of at least one of Co and Ni. The body includes first and second faces, a cutting edge located at an edge of the first and second faces, and an interior portion located at a depth of 400 ?m or more from the first face. When residual stresses are measured by a 2D method, stress of the first hard phase is 80 MPa or more in terms of compressive stress. Stresses of the second hard phase and the binding phase are ?50 MPa to 50 Mpa in terms of compressive or tensile stress.Type: GrantFiled: December 26, 2011Date of Patent: April 17, 2018Assignee: Kyocera CorporationInventors: Takashi Tokunaga, Hideyoshi Kinoshita
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Publication number: 20180026401Abstract: A connector is attachable to a front end of a cable in a front-rear direction. The cable comprises coated signal cables and an outer member which protects the signal cables. The connector comprises terminals, a holding member, a shell, an assigned portion and an impedance adjusting portion. The terminals are attached to the signal cables, respectively, under an attached state where the connector is attached to the front end of the cable. The holding member holds the terminals. The shell covers the holding member to have a predetermined surface which intersects with a perpendicular direction perpendicular to the front-rear direction. The assigned portion is located on the outer member of the cable under the attached state. The impedance adjusting portion is located forward of the assigned portion in the front-rear direction and located inward in the perpendicular direction in comparison with both the predetermined surface and the assigned portion.Type: ApplicationFiled: June 13, 2017Publication date: January 25, 2018Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Hironori KANDA, Junichi MIYAMOTO, Masao YAMAMOTO, Takashi TOKUNAGA, Ryutaro YAMAZAKI, Hiroshi KOBAYASHI, Motoya HARA
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Patent number: 9806447Abstract: A connector comprises a shell fixed portion connected to a shell, a ground contact and a differential pair consisting of two signal contacts. The ground contact has a ground fixed portion. Each signal contact has a signal fixed portion. The shell fixed portion, the signal fixed portions and the ground fixed portion are fixed to the circuit board when the connector is used. The shell fixed portion, one of the signal fixed portions, a remaining one of the signal fixed portions, the ground fixed portion form a fixed-portion group in which they are adjacent to one another in this order. Moreover, the ground fixed portion and the signal fixed portions are arranged in a row along a pitch direction. When the fixed-portion group is seen along the pitch direction, at least a part of the shell fixed portion occupies an area same as a part of the signal fixed portion.Type: GrantFiled: May 12, 2016Date of Patent: October 31, 2017Assignee: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Akinori Kimura, Takashi Tokunaga
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Patent number: 9742024Abstract: A secondary battery including: spirally wound electrode body in which positive electrode and negative electrode are laminated via separator and spirally wound, wherein the positive electrode includes an inner circumference side positive electrode active material layer and an outer circumference side positive electrode active material layer while including a single side active material layer formation region, the ratio A/(A+B) of an area density A (mg/cm2) of the inner circumference side positive electrode active material layer and an area density B (mg/cm2) of the outer circumference side positive electrode active material layer, an inner diameter C (mm) of the coil opening portion, and the ratio D/E of a thickness D (?m) of the positive electrode and a thickness E (?m) of the positive electrode collector satisfy the relationship expressed in Formula 1, and a length F (mm) of the single side active material layer formation region satisfies the relationship expressed in Formula 2.Type: GrantFiled: April 16, 2015Date of Patent: August 22, 2017Assignee: Sony CorporationInventors: Takashi Tokunaga, Hironobu Fukahori
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Publication number: 20170018867Abstract: A connector comprises a shell fixed portion connected to a shell, a ground contact and a differential pair consisting of two signal contacts. The ground contact has a ground fixed portion. Each signal contact has a signal fixed portion. The shell fixed portion, the signal fixed portions and the ground fixed portion are fixed to the circuit board when the connector is used. The shell fixed portion, one of the signal fixed portions, a remaining one of the signal fixed portions, the ground fixed portion form a fixed-portion group in which they are adjacent to one another in this order. Moreover, the ground fixed portion and the signal fixed portions are arranged in a row along a pitch direction. When the fixed-portion group is seen along the pitch direction, at least a part of the shell fixed portion occupies an area same as a part of the signal fixed portion.Type: ApplicationFiled: May 12, 2016Publication date: January 19, 2017Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Akinori KIMURA, Takashi TOKUNAGA
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Publication number: 20160181589Abstract: A prismatic secondary battery of one configuration has a current disconnection mechanism, and a distance from a first conductive member to a second conductive member along a surface of a first insulation member and passing an outer periphery of the first insulation member is greater than or equal to 2.4 mm. At least one of the first insulation member and a second insulation member is formed from a material having a weight reduction percentage of 100% in thermo gravimetric measurement under conditions of a measurement temperature of 25° C.-600° C., a temperature increase rate of 5° C.±0.5° C./min, a measurement atmosphere of inert gas flow, and an amount of measurement sample of 10 mg±5 mg.Type: ApplicationFiled: December 15, 2015Publication date: June 23, 2016Inventors: Yoshinori YOKOYAMA, Naoya TADA, Yasuhiro YAMAUCHI, Toshihiro TAKADA, Hiroshi INUKAI, Yasushi TSUCHIDA, Takashi TOKUNAGA, Akira KIYAMA
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Publication number: 20150270658Abstract: A contact realizing excellent transmission of high-speed signals by reducing a transmission path length and electric influence of adjacent contacts. In a first housing disposed on a circuit board, a second housing is fitted for receiving a mating connector therein in a manner movable in a moving direction orthogonal to a receiving direction. Each contact includes a contact portion brought into contact with an associated mating contact of the mating connector, a connection portion connected to the circuit board, and an elastically deformable linking portion connecting the contact and connection portions. The second and first housings hold the contact and connection portions, respectively. A dimension A of the linking portion in the receiving direction and a dimension B of the linking portion in a front-rear direction orthogonal to both the receiving and contact arranging directions is set to e.g. A>B.Type: ApplicationFiled: March 17, 2015Publication date: September 24, 2015Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Shigeharu AOKI, Takashi TOKUNAGA
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Publication number: 20150221975Abstract: A secondary battery including: spirally wound electrode body in which positive electrode and negative electrode are laminated via separator and spirally wound, wherein the positive electrode includes an inner circumference side positive electrode active material layer and an outer circumference side positive electrode active material layer while including a single side active material layer formation region, the ratio A/(A+B) of an area density A (mg/cm2) of the inner circumference side positive electrode active material layer and an area density B (mg/cm2) of the outer circumference side positive electrode active material layer, an inner diameter C (mm) of the coil opening portion, and the ratio D/E of a thickness D (?m) of the positive electrode and a thickness E (?m) of the positive electrode collector satisfy the relationship expressed in Formula 1, and a length F (mm) of the single side active material layer formation region satisfies the relationship expressed in Formula 2.Type: ApplicationFiled: April 16, 2015Publication date: August 6, 2015Inventors: Takashi TOKUNAGA, Hironobu FUKAHORI