Patents by Inventor Koichi Oku
Koichi Oku 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: 20230402890Abstract: A rotor constituting a rotating electric machine includes a rotating shaft and a permanent magnet. A sleeve covering the outer surface of the permanent magnet is attached to the rotating shaft. A resin coating layer is formed on an outer circumferential wall of the sleeve. The resin coating layer includes a base portion and a plurality of ridges formed on the outer circumferential wall of the base portion. A riblet recessed relative to the plurality of ridges is formed between the plurality of ridges.Type: ApplicationFiled: June 7, 2023Publication date: December 14, 2023Inventors: Yuji Ono, Keiji Tada, Tsutomu Yoshino, Kimiaki Nakamura, Kaoru Tomioka, Tomoya Otani, Koichi Oku
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Patent number: 9018822Abstract: A stator for a rotary electric machine includes: a stator core in a cylindrical shape with plural slots formed at an inner circumferential surface; plural coil segments inserted in the slots from one end surface side of the stator core; and plural coil end plates electrically connected with the coil segments on another end surface side of the stator core, wherein the coil segments respectively include: one leg portion; another leg portion; and a curved portion that is continuously formed between the one leg portion and the other leg portion, wherein the coil end plates respectively include: a plate portion in a flat plate shape; and a pair of extended portions, and wherein end portions of the leg portions of the coil segments are connected to the extended portions. It is possible to improve assembility and attain downsizing by reducing the volume of coil end portions for the stator.Type: GrantFiled: March 7, 2012Date of Patent: April 28, 2015Assignee: Honda Motor Co., Ltd.Inventors: Takeomi Okimitsu, Koichi Oku
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Patent number: 8596394Abstract: A brake structure for a wheel rotating device includes a motor provided in a wheel and is driven for rotating the wheel, and a braking mechanism for actuating brake to brake the wheel. The motor includes: a motor housing; a stator positioned in and fixed to the motor housing; and a rotor positioned in the motor housing and facing to the stator. The braking mechanism includes: a brake rotor to rotate with the wheel; frictional members to be in contact with the brake rotor for generation of braking force; a pressing force generating unit for generating pressing force of the frictional members so that the frictional members are urged to and pressed against the brake rotor by supplying brake fluid through a brake fluid passage to transmit fluid pressure; and a housing for the pressing force generating unit. The brake fluid passage is formed inside a wall of the motor housing, and is connected to a brake fluid supply port provided in the housing for the pressing force generating unit.Type: GrantFiled: March 31, 2011Date of Patent: December 3, 2013Assignee: Honda Motor Co., Ltd.Inventors: Tsutomu Yoshino, Koichi Oku
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Publication number: 20120228989Abstract: A stator for a rotary electric machine includes: a stator core in a cylindrical shape with plural slots formed at an inner circumferential surface; plural coil segments inserted in the slots from one end surface side of the stator core; and plural coil end plates electrically connected with the coil segments on another end surface side of the stator core, wherein the coil segments respectively include: one leg portion; another leg portion; and a curved portion that is continuously formed between the one leg portion and the other leg portion, wherein the coil end plates respectively include: a plate portion in a flat plate shape; and a pair of extended portions, and wherein end portions of the leg portions of the coil segments are connected to the extended portions. It is possible to improve assembility and attain downsizing by reducing the volume of coil end portions for the stator.Type: ApplicationFiled: March 7, 2012Publication date: September 13, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Takeomi OKIMITSU, Koichi Oku
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Patent number: 8186467Abstract: A wheel rotating device (1) for an in-wheel motor vehicle includes a motor (2), a speed reducer (6) coupled to an output part of the motor (2), a hub (4) coupled to an output part of the speed reducer (6), and a spindle (5) fixed relative to a vehicle body and supporting the hub (4) in a manner that permits the hub (4) to rotate. The hub (4) is coupled to a wheel (13) to rotate the wheel (13). A stator (21) of the motor (2) is disposed inwardly in radial directions of the wheel (13) along an inner circumferential surface of the wheel (13). A rotor (22) of the motor (2) is disposed inwardly in radial directions of the stator (21). The speed reducer (6) is disposed between the rotor (22) and the hub (4) with bearings provided between the speed reducer (6) and the hub (4).Type: GrantFiled: August 31, 2006Date of Patent: May 29, 2012Assignee: Honda Motor Co., Ltd.Inventors: Tsutomu Yoshino, Koichi Oku
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Patent number: 7990011Abstract: A rotor for an electric motor (10) includes a magnetic assembly (12) formed into a ring-shaped plate form, a rotor disc (11) for holding an inner periphery of the magnet assembly, and an outer peripheral ring (13) for holding an outer periphery of the magnet assembly. The magnet assembly is composed of first and second main magnets (12A-1, 12A-2) having magnetizations directions that are oriented perpendicularly and having orientations that are opposite one another, and first and second submagnets (12B-1, 12B-2) having magnetization directions that are oriented perpendicularly in a circumferential direction and having orientations that are opposite one another. At least one group of magnets selected from the main magnets and the submagnets has a wedge-shaped planar part. The planar parts of the first and second main magnets and first and second submagnets form the same plane of rotation. The magnets are arranged so that the magnetization directions of adjacent magnets are perpendicular to one another.Type: GrantFiled: February 8, 2007Date of Patent: August 2, 2011Assignee: Honda Motor Co., Ltd.Inventors: Tsutomu Yoshino, Koichi Oku, Hisashi Murakami
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Publication number: 20110175431Abstract: A brake structure for a wheel rotating device includes a motor provided in a wheel and is driven for rotating the wheel, and a braking mechanism for actuating brake to brake the wheel. The motor includes: a motor housing; a stator positioned in and fixed to the motor housing; and a rotor positioned in the motor housing and facing to the stator. The braking mechanism includes: a brake rotor to rotate with the wheel; frictional members to be in contact with the brake rotor for generation of braking force; a pressing force generating unit for generating pressing force of the frictional members so that the frictional members are urged to and pressed against the brake rotor by supplying brake fluid through a brake fluid passage to transmit fluid pressure; and a housing for the pressing force generating unit. The brake fluid passage is formed inside a wall of the motor housing, and is connected to a brake fluid supply port provided in the housing for the pressing force generating unit.Type: ApplicationFiled: March 31, 2011Publication date: July 21, 2011Inventors: Tsutomu YOSHINO, Koichi Oku
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Patent number: 7938211Abstract: A brake structure for a wheel rotating device is disclosed, which comprises a motor provided in a wheel and is driven for rotating the wheel, and a braking mechanism for actuating brake to brake the wheel. The motor includes: a motor housing; a stator positioned in and fixed to the motor housing; and a rotor positioned in the motor housing and facing to the stator. The braking mechanism includes: a brake rotor to rotate with the wheel; frictional members to be in contact with the brake rotor for generation of braking force; a pressing force generating unit for generating pressing force of the frictional members so that the frictional members are urged to and pressed against the brake rotor by supplying brake fluid through a brake fluid passage to transmit fluid pressure; and a housing for the pressing force generating unit. The brake fluid passage is formed inside a wall of the motor housing, and is connected to a brake fluid supply port provided in the housing for the pressing force generating unit.Type: GrantFiled: August 29, 2007Date of Patent: May 10, 2011Assignee: Honda Motor Co., Ltd.Inventors: Tsutomu Yoshino, Koichi Oku
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Patent number: 7717203Abstract: In a wheel rotating apparatus including a motor and a planet gear mechanism to generate a drive force, the planet gear includes first and second gears having different diameters, connected to each other in an axial direction thereof with planet gear shaft. The first gear is inside the stator and the rotor in radial and axial directions of the wheel and the second gear is outside the first gear in an axial direction of the wheel. A vehicle may include a suspension connected to the base of the wheel rotating apparatus.Type: GrantFiled: August 29, 2007Date of Patent: May 18, 2010Assignee: Honda Motor Co., Ltd.Inventors: Tsutomu Yoshino, Koichi Oku
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Publication number: 20100052452Abstract: A rotor for an electric motor (10) includes a magnetic assembly (12) formed into a ring-shaped plate form, a rotor disc (11) for holding an inner periphery of the magnet assembly, and an outer peripheral ring (13) for holding an outer periphery of the magnet assembly. The magnet assembly is composed of first and second main magnets (12A-1, 12A-2) having magnetizations directions that are oriented perpendicularly and having orientations that are opposite one another, and first and second submagnets (12B-1, 12B-2) having magnetization directions that are oriented perpendicularly in a circumferential direction and having orientations that are opposite one another. At least one group of magnets selected from the main magnets and the submagnets has a wedge-shaped planar part. The planar parts of the first and second main magnets and first and second submagnets form the same plane of rotation. The magnets are arranged so that the magnetization directions of adjacent magnets are perpendicular to one another.Type: ApplicationFiled: February 8, 2007Publication date: March 4, 2010Inventors: Tsutomu Yoshino, Koichi Oku, Hisashi Murakami
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Publication number: 20090166112Abstract: A wheel rotating device (1) for an in-wheel motor vehicle includes a motor (2), a speed reducer (6) coupled to an output part of the motor (2), a hub (4) coupled to an output part of the speed reducer (6), and a spindle (5) fixed relative to a vehicle body and supporting the hub (4) in a manner that permits the hub (4) to rotate. The hub (4) is coupled to a wheel (13) to rotate the wheel (13). A stator (21) of the motor (2) is disposed inwardly in radial directions of the wheel (13) along an inner circumferential surface of the wheel (13). A rotor (22) of the motor (2) is disposed inwardly in radial directions of the stator (21). The speed reducer (6) is disposed between the rotor (22) and the hub (4) with bearings provided between the speed reducer (6) and the hub (4).Type: ApplicationFiled: August 31, 2006Publication date: July 2, 2009Inventors: Tsutomu Yoshino, Koichi Oku
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Publication number: 20080070736Abstract: In a wheel rotating apparatus including a motor and a planet gear mechanism to generate a drive force, the planet gear includes first and second gears having different diameters, connected to each other in an axial direction thereof with planet gear shaft. The first gear is inside the stator and the rotor in radial and axial directions of the wheel and the second gear is outside the first gear in an axial direction of the wheel. A vehicle may include a suspension connected to the base of the wheel rotating apparatus.Type: ApplicationFiled: August 29, 2007Publication date: March 20, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Tsutomu Yoshino, Koichi Oku
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Publication number: 20080053719Abstract: A brake structure for a wheel rotating device is disclosed, which comprises a motor provided in a wheel and is driven for rotating the wheel, and a braking mechanism for actuating brake to brake the wheel. The motor includes: a motor housing; a stator positioned in and fixed to the motor housing; and a rotor positioned in the motor housing and facing to the stator. The braking mechanism includes: a brake rotor to rotate with the wheel; frictional members to be in contact with the brake rotor for generation of braking force; a pressing force generating unit for generating pressing force of the frictional members so that the frictional members are urged to and pressed against the brake rotor by supplying brake fluid through a brake fluid passage to transmit fluid pressure; and a housing for the pressing force generating unit. The brake fluid passage is formed inside a wall of the motor housing, and is connected to a brake fluid supply port provided in the housing for the pressing force generating unit.Type: ApplicationFiled: August 29, 2007Publication date: March 6, 2008Inventors: Tsutomu Yoshino, Koichi Oku
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Patent number: 6716088Abstract: A processing apparatus capable of grinding an arcuate groove (a groove having an arcuate shape in section) of various shapes defined in a work with a good accuracy. A pseudo-elliptic arcuate groove defined in a work is ground by a forming grindstone. The work is moved in a Y-axis direction (vertically on a paper sheet) in a state in which the forming grindstone is supported on a tool table for rotation and is moved in a X-axis direction (a direction perpendicular to the paper sheet) to abut against the arcuate groove, while rotating the work in a direction of an arrow with its axis L matched with an axis C of an indexer. Thus, it is possible to relatively move the forming grindstone to trace the arcuate groove, thereby accurately grinding the arcuate groove.Type: GrantFiled: January 9, 2002Date of Patent: April 6, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Yasuhiko Jinbu, Koichi Oku, Takeshi Morioka
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Publication number: 20020090897Abstract: A processing apparatus capable of grinding an arcuate groove (a groove having an arcuate shape in section) of various shapes defined in a work with a good accuracy. A pseudo-elliptic arcuate groove defined in a work is ground by a forming grindstone. The work is moved in a Y-axis direction (vertically on a paper sheet) in a state in which the forming grindstone is supported on a tool table for rotation and is moved in a X-axis direction (a direction perpendicular to the paper sheet) to abut against the arcuate groove, while rotating the work in a direction of an arrow with its axis L matched with an axis C of an indexer. Thus, it is possible to relatively move the forming grindstone to trace the arcuate groove, thereby accurately grinding the arcuate groove.Type: ApplicationFiled: January 9, 2002Publication date: July 11, 2002Inventors: Yasuhiko Jinbu, Koichi Oku, Takeshi Morioka
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Patent number: 4744946Abstract: A material for storage of hydrogen, consisting essentially of an alloy represented by the following general formula:LmNiawhere Lm signifies rare earth metals which contain 40 to 70% by weight of lanthanum, 0.1 to 20% by weight of cerium and other metals such as neodymium, praseodymium, and/or samarium; and a signifies a range of 4.8<a<5.5. Thus, improved hydrogen absorption under relatively low pressure at room temperatures and also improved hydrogen absorption pressure and release equilibrium pressure can be provided.Type: GrantFiled: November 7, 1986Date of Patent: May 17, 1988Assignee: Japan Metals and Chemicals Co., Ltd.Inventors: Takashi Sasai, Hisao Konno, Noboru Hayami, Kenichi Kobayashi, Susumu Uoya, Koichi Oku
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Patent number: 4732827Abstract: A process for producing an anolyte and a catholyte for redox cells which comprises the steps of heating chromium ore together with carbonaceous substances to produce a pre-reduced chromium product produced a part of iron and chromium in chromium ore, dissolving the pre-reduced chromium product in hydrochloric acid and/or sulfuric acid iron and chromium. Thus, the dissolving step can be simplified, the predetermined concentration can be simply regulated.Type: GrantFiled: July 2, 1986Date of Patent: March 22, 1988Assignees: Japan Metals and Chemical Co., Ltd., Agency of Industrial Science and TechnologyInventors: Hiroko Kaneko, Ken Nozaki, Takeo Ozawa, Koichi Oku, Takashi Shimanuki, Yoshinori Koga
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Patent number: 4597957Abstract: A process for electrolytically producing a metallic oxide for a ferrite comprising the steps of electrolyzing an inorganic ammonium salt solution of 2-20% containing 0.01-5% of fluoride compound as an electrode with metals or mixture of metals necessary for producing the ferrite as an anode and graphite as a cathode to produce the hydroxide of the metal used as the anode, oxidizing and separating the hydroxide, and then drying and calcining the hydroxide. Thus, a low silica metal oxide of uniform composition is produced by mixing the composition of a ferrite to be produced with iron and/or manganese or iron and/or manganese in case of producing the metal oxide for the ferrite, and electrolyzing various metal with the resultant mixture as an anode.Type: GrantFiled: March 4, 1985Date of Patent: July 1, 1986Assignee: Japan Metals and Chemicals Co., Ltd.Inventors: Koichi Oku, Kiyoshi Matsuura