Patents by Inventor Tetsuya Ozaki
Tetsuya Ozaki 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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Patent number: 9869007Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: GrantFiled: July 26, 2016Date of Patent: January 16, 2018Assignees: GS YUASA INTERNATIONAL LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tadashi Kakeya, Manabu Kanemoto, Minoru Kuzuhara, Tetsuya Ozaki, Masaharu Watada, Tetsuo Sakai
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Patent number: 9634324Abstract: It is an object of the present invention to improve the cycle performance in a nickel-metal hydride battery using a rare earth-Mg—Ni type alloy. The present invention provides a nickel-metal hydride battery having a negative electrode including an La—Mg—Ni based hydrogen absorbing alloy, wherein the hydrogen absorbing alloy has a crystal phase having Gd2Co7 type crystal structure and contains calcium.Type: GrantFiled: September 18, 2008Date of Patent: April 25, 2017Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Tetsuya Ozaki, Manabu Kanemoto, Masaharu Watada
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Publication number: 20160333443Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: ApplicationFiled: July 26, 2016Publication date: November 17, 2016Applicants: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tadashi KAKEYA, Manabu KANEMOTO, Minoru KUZUHARA, Tetsuya OZAKI, Masaharu WATADA, Tetsuo SAKAI
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Patent number: 9496550Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: GrantFiled: January 6, 2015Date of Patent: November 15, 2016Assignees: GS YUASA INTERNATIONAL LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tadashi Kakeya, Manabu Kanemoto, Minoru Kuzuhara, Tetsuya Ozaki, Masaharu Watada, Tetsuo Sakai
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Patent number: 9450238Abstract: The present invention provides a hydrogen absorption alloy, which includes chemical composition represented by the general formula M1tM2uM3vCawMgxNiyM4z wherein 16×(d?1.870)/(d?r)?v?16×(d?1.860)/(d?r); 1.6?w?3.2; 4.1?×?5.1; 3.2?(y+z)/(t+u+v+w+x)?3.4; t +u+v+w+x+y+z=100; M1 is one or more elements selected from La, Pr, and Nd; M2 is one or more elements selected from V, Nb, Ta, Ti, Zr, and Hf; M3 is one or more elements selected from Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; M4 is one or more elements selected from Co, Mn, Al, Cu, Fe, Cr, and Zn; d is an average atomic radius of the elements selected as M1; and r is an average atomic radius of the elements selected as M3; and an electrode and a secondary battery using the same.Type: GrantFiled: March 25, 2011Date of Patent: September 20, 2016Assignee: GS Yuasa International Ltd.Inventors: Tetsuya Ozaki, Manabu Kanemoto, Yoshiteru Kawabe, Tadashi Kakeya
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Patent number: 9038763Abstract: A hydraulic power steering system includes: a hydraulic cylinder in which an interior is partitioned into first and second hydraulic chambers by a piston on a steered shaft; a variable displacement electric pump that supplies hydraulic fluid to the hydraulic cylinder; a selector valve selectively set in a mode in which the hydraulic fluid is supplied to the first hydraulic chamber and drained from the second hydraulic chamber or in a mode in which the hydraulic fluid is supplied to the second hydraulic chamber and drained from the first hydraulic chamber; a detector that detects torque, steering angle, and/or vehicle speed; and a controller.Type: GrantFiled: October 14, 2011Date of Patent: May 26, 2015Assignee: JTEKT CORPORATIONInventors: Ryouichi Kubo, Yasuhiro Tomagou, Akihiko Shiina, Masahiko Sakamaki, Tetsuya Ozaki
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Publication number: 20150118557Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: ApplicationFiled: January 6, 2015Publication date: April 30, 2015Applicants: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tadashi KAKEYA, Manabu KANEMOTO, Minoru KUZUHARA, Tetsuya OZAKI, Masaharu WATADA, Tetsuo SAKAI
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Patent number: 8584791Abstract: A hydraulic power steering apparatus assists in steering of a vehicle with a hydraulic cylinder. The hydraulic power steering apparatus includes a flow control valve, a steering torque sensor, a steering angle sensor, a vehicle speed sensor, and an ECU. The flow control valve changes the supply/drainage amount of hydraulic fluid for the hydraulic cylinder. The ECU sets a supply/drainage mode for supplying/draining the hydraulic fluid with respect to the hydraulic cylinder based on detection results from the aforementioned sensors and controls the flow control valve in accordance with the supply/drainage mode of the hydraulic fluid.Type: GrantFiled: October 14, 2011Date of Patent: November 19, 2013Assignee: JTEKT CorporationInventors: Masahiko Sakamaki, Yasuhiro Tomagou, Akihiko Shiina, Tetsuya Ozaki, Ryouichi Kubo
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Patent number: 8343659Abstract: The present invention provides a hydrogen absorbing alloy containing a phase of a Gd2Co7 type crystal structure, wherein the phase exists at a ratio of 10 weight % or higher in the entire hydrogen absorbing alloy and yttrium is contained at a ratio of 2 mol % or more and 10 mol % or less in the entire hydrogen absorbing alloy.Type: GrantFiled: August 24, 2006Date of Patent: January 1, 2013Assignees: GS Yuasa International Ltd., National Insitute of Advanced Industrial Science and TechnologyInventors: Tetsuya Ozaki, Tetsuo Sakai, Manabu Kanemoto, Tadashi Kakeya, Minoru Kuzuhara, Masaharu Watada
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Patent number: 8343660Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: GrantFiled: August 8, 2007Date of Patent: January 1, 2013Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Tadashi Kakeya, Manabu Kanemoto, Minoru Kuzuhara, Tetsuya Ozaki, Masaharu Watada, Tetsuo Sakai
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Publication number: 20120318413Abstract: Provided is a hydrogen storage alloy which is characterized in that two or more crystal phases having different crystal structures are layered in a c-axis direction of the crystal structures. The hydrogen storage alloy is further characterized in that a difference between a maximum value and a minimum value of a lattice constant a in the crystal structures of the laminated two or more crystal phases is 0.03 ? or less.Type: ApplicationFiled: August 16, 2012Publication date: December 20, 2012Applicants: National Institute of Advanced Science and Technology, GS Yuasa CorporationInventors: Tadashi KAKEYA, Manabu KANEMOTO, Minoru KUZUHARA, Tetsuya OZAKI, Masaharu WATADA, Tetsuo SAKAI
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Publication number: 20120315183Abstract: The present invention provides a hydrogen absorption alloy, which includes chemical composition represented by the general formula M1tM2uM3vCawMgxNiyM4z wherein 16×(d?1.870)/(d?r)?v?16×(d?1.860)/(d?r); 1.6?w?3.2; 4.1×5.1; 3.2?(y+z)/(t+u+v+w+3.4; t+u+v+w+x+y+z=100; M1 is one or more elements selected from La, Pr, and Nd; M2 is one or more elements selected from V, Nb, Ta, Ti, Zr, and Hf; M3 is one or more elements selected from Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; M4 is one or more elements selected from Co, Mn, Al, Cu, Fe, Cr, and Zn; d is an average atomic radius of the elements selected as M1; and r is an average atomic radius of the elements selected as M3; and an electrode and a secondary battery using the same.Type: ApplicationFiled: March 25, 2011Publication date: December 13, 2012Applicant: GS YUASA INTERNATIONAL LTD.Inventors: Tetsuya Ozaki, Manabu Kanemoto, Yoshiteru Kawabe, Tadashi Kakeya
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Patent number: 8277582Abstract: The present invention provides a hydrogen absorbing alloy containing a phase of a Pr5Co19 type crystal structure having a composition defined by a general formula A(4?w)B(1+w)C19 (A denotes one or more element(s) selected from rare earth elements including Y (yttrium); B denotes an Mg element; C denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; and w denotes a numeral in a range from ?0.1 to 0.8) and having a composition as a whole defined by a general formula R1xR2yR3z (15.8?x?17.8, 3.4?y?5.0, 78.8?z?79.6, and x+y+z=100; R1 denotes one or more element(s) selected from rare earth elements including Y (yttrium); R2 denotes an Mg element, R3 denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; the numeral of Mn+Al in the z is 0.5 or higher; and the numeral of Al in the z is 4.1 or lower).Type: GrantFiled: April 19, 2011Date of Patent: October 2, 2012Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Manabu Kanemoto, Tadashi Kakeya, Minoru Kuzuhara, Masaharu Watada, Tetsuo Sakai, Tetsuya Ozaki
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Patent number: 8251172Abstract: In an electric power steering device, if the temperature of a specific site that increases due to the driving of a steering assist motor exceeds a threshold, the motor current is controlled to be equal to or below a current restriction value. The temperature Toff of the specific site detected when an engine is stopped, and the current restriction value Ioff provided when the engine is stopped are stored into a storage. A temperature difference Ta between the temperature detected when a starter switch is turned on and the temperature Toff is computed. If the temperature of the specific site when the starter switch is turned on is above the threshold, the current restriction value is set to be equal to or above the current restriction value Ioff stored in the storage, according to the temperature difference Ta, over a time following the turning-on of the starter switch.Type: GrantFiled: February 3, 2009Date of Patent: August 28, 2012Assignee: JTEKT CorporationInventors: Hiroyasu Inoue, Tetsuya Ozaki
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Publication number: 20120097472Abstract: A hydraulic power steering system includes: a hydraulic cylinder in which an interior is partitioned into first and second hydraulic chambers by a piston on a steered shaft; a variable displacement electric pump that supplies hydraulic fluid to the hydraulic cylinder; a selector valve selectively set in a mode in which the hydraulic fluid is supplied to the first hydraulic chamber and drained from the second hydraulic chamber or in a mode in which the hydraulic fluid is supplied to the second hydraulic chamber and drained from the first hydraulic chamber; a detector that detects torque, steering angle, and/or vehicle speed; and a controller.Type: ApplicationFiled: October 14, 2011Publication date: April 26, 2012Applicant: JTEKT CORPORATIONInventors: Ryouichi KUBO, Yasuhiro TOMAGOU, Akihiko SHIINA, Masahiko SAKAMAKI, Tetsuya OZAKI
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Publication number: 20120097471Abstract: A hydraulic power steering apparatus assists in steering of a vehicle with a hydraulic cylinder. The hydraulic power steering apparatus includes a flow control valve, a steering torque sensor, a steering angle sensor, a vehicle speed sensor, and an ECU. The flow control valve changes the supply/drainage amount of hydraulic fluid for the hydraulic cylinder. The ECU sets a supply/drainage mode for supplying/draining the hydraulic fluid with respect to the hydraulic cylinder based on detection results from the aforementioned sensors and controls the flow control valve in accordance with the supply/drainage mode of the hydraulic fluid.Type: ApplicationFiled: October 14, 2011Publication date: April 26, 2012Applicant: JTEKT CORPORATIONInventors: Masahiko SAKAMAKI, Yasuhiro TOMAGOU, Akihiko SHIINA, Tetsuya OZAKI, Ryouichi KUBO
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Publication number: 20110274972Abstract: The present invention aims to increase the discharge capacity and to improve the cycle life performance in a nickel-metal hydride rechargeable battery using a La—Mg—Ni based hydrogen-absorbing alloy as an active material of a negative electrode. The present invention provides a hydrogen-absorbing alloy represented by the general formula (1): M1uMgvCawM2xNiyM3z . . . (1) (wherein, M1 is one or more elements selected from rare earth elements; M2 is one or more elements selected from the group consisting of Group 3A elements; Group 4A elements, Group 5A elements, and Pd (excluding rare earth elements); M3 is one or more elements selected from the group consisting of Group 6A elements, Group 7A elements, Group 8 elements, Group 1B elements, Group 2B elements, and Group 3B elements (excluding Ni and Pd); u, v, w, x, y, and z are numbers satisfying, u+v+w+x+y+z=100, 3.4?v?5.9, 0.8?w?3.1, 0?(x+z)?5, and 3.2?(y+z)/(u+v+w+x)?3.Type: ApplicationFiled: January 20, 2010Publication date: November 10, 2011Applicant: GS Yuasa International Ltd.Inventors: Manabu Kanemoto, Tetsuya Ozaki, Masaharu Watada
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Patent number: 8021606Abstract: A hydrogen storage alloy containing a phase of a chemical composition defined by a general formula A5·xB1+xC24: wherein in the general formula A5·xB1+xC24, A denotes one or more element(s) selected from rare earth elements; B denotes one or more element(s) selected from a group consisting of Mg, Ca, Sr, and Ba; C denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, Al, Cr, Fe, Cu, Zn, Si, Sn, V, Nb, Ta, Ti, Zr, and Hf; and x denotes a numeral in a range from ?0.1 to 0.8: and the phase has a crystal structure belonging to a space group of R-3m and having a length ratio of the c-axis to the a-axis of the lattice constant in a range of 11.5 to 12.5.Type: GrantFiled: August 11, 2006Date of Patent: September 20, 2011Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science & TechnologyInventors: Tetsuya Ozaki, Tetsuo Sakai, Manabu Kanemoto, Minoru Kuzuhara, Tadashi Kakeya, Masaharu Watada
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Publication number: 20110192506Abstract: The present invention provides a hydrogen absorbing alloy containing a phase of a Pr5Co19 type crystal structure having a composition defined by a general formula A(4-w)B(1+w)C19 (A denotes one or more element(s) selected from rare earth elements including Y (yttrium); B denotes an Mg element; C denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; and w denotes a numeral in a range from ?0.1 to 0.8) and having a composition as a whole defined by a general formula R1xR2yR3z (15.8?x?17.8, 3.4?y?5.0, 78.8?z?79.6, and x+y+z=100; R1 denotes one or more element(s) selected from rare earth elements including Y (yttrium); R2 denotes an Mg element, R3 denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; the numeral of Mn+Al in the z is 0.5 or higher; and the numeral of Al in the z is 4.1 or lower).Type: ApplicationFiled: April 19, 2011Publication date: August 11, 2011Applicants: GS YUASA INTERNATIONAL LTD, National Institute of Advanced Industrial Science and TechnologyInventors: Manabu KANEMOTO, Tadashi Kakeya, Minoru Kuzuhara, Masaharu Watada, Tetsuo Sakai, Tetsuya Ozaki
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Patent number: 7951326Abstract: The present invention provides a hydrogen absorbing alloy containing a phase of a Pr5Co19 type crystal structure having a composition defined by a general formula A(4?w)B(1+w)C19 (A denotes one or more element(s) selected from rare earth elements including Y (yttrium); B denotes an Mg element; C denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; and w denotes a numeral in a range from ?0.1 to 0.8) and having a composition as a whole defined by a general formula R1xR2yR3z (15.8?x?17.8, 3.4?y?5.0, 78.8?z?79.6, and x+y+z=100; R1 denotes one or more element(s) selected from rare earth elements including Y (yttrium); R2 denotes an Mg element, R3 denotes one or more element(s) selected from a group consisting of Ni, Co, Mn, and Al; the numeral of Mn+Al in the z is 0.5 or higher; and the numeral of Al in the z is 4.1 or lower).Type: GrantFiled: August 11, 2006Date of Patent: May 31, 2011Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and TechnologyInventors: Manabu Kanemoto, Tadashi Kakeya, Minoru Kuzuhara, Masaharu Watada, Tetsuo Sakai, Tetsuya Ozaki