Patents by Inventor Toshikazu Nanbu
Toshikazu Nanbu 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: 11819900Abstract: An incremental forming tool of the present invention includes a holding portion attached to an incremental forming apparatus and a free curved surface part for pressing a metal plate. The free curved surface part is made of at least a hard metal base material and a surface of the free curved surface part is covered with a hard film. The surface of the hard film has an Rpk of 0.15 ?m or less, the Rpk is defined by JIS B 0671 and is calculated from a material ratio curve of a roughness curve, and has an Ra of 0.2 ?m or less, the Ra is defined by JIS B 0601 and is calculated from a roughness curve. Therefore, a molded product having a smooth worked surface with no roughness can be produced without adding any extra equipment for preventing adhesion.Type: GrantFiled: May 14, 2020Date of Patent: November 21, 2023Assignee: NISSAN MOTOR CO., LTD.Inventors: Noriko Uchiyama, Hirotaka Miwa, Hidenori Watanabe, Toshikazu Nanbu
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Publication number: 20230191471Abstract: An incremental forming tool of the present invention includes a holding portion attached to an incremental forming apparatus and a free curved surface part for pressing a metal plate. The free curved surface part is made of at least a hard metal base material and a surface of the free curved surface part is covered with a hard film. The surface of the hard film has an Rpk of 0.15 ?m or less, the Rpk is defined by JIS B 0671 and is calculated from a material ratio curve of a roughness curve, and has an Ra of 0.2 ?m or less, the Ra is defined by JIS B 0601 and is calculated from a roughness curve. Therefore, a molded product having a smooth worked surface with no roughness can be produced without adding any extra equipment for preventing adhesion.Type: ApplicationFiled: May 14, 2020Publication date: June 22, 2023Applicant: NISSAN MOTOR CO., LTD.Inventors: Noriko UCHIYAMA, Hirotaka MIWA, Hidenori WATANABE, Toshikazu NANBU
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Patent number: 10566883Abstract: The present invention is a sliding contact member, including a powder compact portion that contains an electrically conductive diamond and an electrically conductive binder, and is provided at least on a sliding contact surface of either or both of two sliding contact members slidably in contact with each other. The sliding contact members are applied to DC motors, generators and the like.Type: GrantFiled: February 21, 2013Date of Patent: February 18, 2020Assignee: NISSAN MOTOR CO., LTD.Inventors: Yoshitaka Uehara, Hirotaka Miwa, Toshikazu Nanbu, Yoshirou Noguchi
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Patent number: 10556292Abstract: An inexpensive bonding method is provided to bond materials constituted of an aluminum-based metal to each other at a low temperature and a low pressure while inhibiting deformation, without requiring the use of a flux and minimizing the influence on the base materials and the periphery. Also provided are various bonded parts obtained by the bonding method. An insert material comprising Zn as an element that undergoes a eutectic reaction with Al is interposed between two materials constituted of an aluminum-based metal. The two materials are heated, while being pressed against each other, to a temperature at which the eutectic reaction takes place, thereby generating, at the bonding interface between the two materials, a melt due to the eutectic reaction with some of the Al contained in the base materials and discharging the Al oxide films from the bonding interface together with the melt. Thus, the two materials are bonded.Type: GrantFiled: August 30, 2011Date of Patent: February 11, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Toshikazu Nanbu, Kenji Miyamoto, Masayuki Inoue, Chika Yamamoto, Yoshitaka Uehara, Akio Hirose
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Patent number: 9834836Abstract: A high durability roller, a manufacturing method thereof and a power transmission device with the high durability roller are provided. The roller for a power transmission device that comprises a plurality of rollers in contact with each other directly or with lubricant between them, includes: a metal base having a Young's modulus of 220 GPa or less; and a coating that is formed on a surface of the metal base, includes hard particles and a metal component composed of at least either simple metal or alloy, and has a Young's modulus of 250 GPa or more. The power transmission device includes the roller. The method of manufacturing the roller includes: forming the coating on the surface of the metal base by thermal spraying using a thermal spray material that comprises the hard particles and the metal component composed of at least either simple metal or alloy.Type: GrantFiled: July 4, 2012Date of Patent: December 5, 2017Assignees: NISSAN MOTOR CO., LTD., FUJIKIKOSAN CORPORATIONInventors: Kazuhiko Takashima, Toshikazu Nanbu, Kazunori Sakata, Kouji Tagomori, Naoki Sugiyama
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Patent number: 9505084Abstract: In joining members to be joined (1, 1) by heating the members to be joined (1, 1) that are mated with intervening an insert (2) while applying opposing loads to the members to be joined (1, 1), so as to allow eutectic reaction to occur between the members to be joined (1, 1) and the insert (2) to discharge a eutectic melt from a joining plane along with an oxide film (1a) of the members to be joined, the members to be joined (1) are brought into contact with the insert (2) so that the oxide film (1a) is broken by a stress concentrating means previously provided at least one of joining portions breaks to produce a starting point of the eutectic reaction.Type: GrantFiled: July 10, 2012Date of Patent: November 29, 2016Assignee: NISSAN MOTOR CO., LTD.Inventors: Shigeyuki Nakagawa, Yoshitaka Uehara, Chika Yamamoto, Kenji Miyamoto, Toshikazu Nanbu
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Patent number: 9272361Abstract: A method for joining metal materials, which joins a first member with at least a joining face made of Metal A, the Metal A being mainly composed of at least one selected from the group consisting of Al, Cu, Ag and Au, to a second member with at least a joining face made of Metal B, the Metal B being mainly composed of at least one selected from the group consisting of Al Cu, Ag and Au, includes interposing an insert between the joining faces of the first and second members, wherein the insert contains Zn as a metal capable of causing an eutectic reaction with at least one metal except for Au in Metal A as well as at least one metal except for Au in Metal B.Type: GrantFiled: February 25, 2013Date of Patent: March 1, 2016Assignee: Nissan Motor Co., Ltd.Inventors: Shigeyuki Nakagawa, Kenji Miyamoto, Toshikazu Nanbu
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Publication number: 20150015111Abstract: The present invention is a sliding contact member, including a powder compact portion that contains an electrically conductive diamond and an electrically conductive binder, and is provided at least on a sliding contact surface of either or both of two sliding contact members slidably in contact with each other. The sliding contact members are applied to DC motors, generators and the like.Type: ApplicationFiled: February 21, 2013Publication date: January 15, 2015Applicant: NISSAN MOTOR CO., LTD.Inventors: Yoshitaka Uehara, Hirotaka Miwa, Toshikazu Nanbu, Yoshirou Noguchi
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Publication number: 20150001280Abstract: A method for joining metal materials, which joins a first member with at least a joining face made of Metal A, the Metal A being mainly composed of at least one selected from the group consisting of Al, Cu, Ag and Au, to a second member with at least a joining face made of Metal B, the Metal B being mainly composed of at least one selected from the group consisting of Al Cu, Ag and Au, includes interposing an insert between the joining faces of the first and second members, wherein the insert contains Zn as a metal capable of causing an eutectic reaction with at least one metal except for Au in Metal A as well as at least one metal except for Au in Metal B.Type: ApplicationFiled: February 25, 2013Publication date: January 1, 2015Inventors: Shigeyuki Nakagawa, Kenji Miyamoto, Toshikazu Nanbu
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Publication number: 20140349099Abstract: A molded rare-earth magnet which simultaneously satisfies increased film thickness, high density, and improved magnetic properties (in particular, coercive force, residual magnetic flux density, and tight adhesion) has a rare-earth magnet phase that contains as a main component a nitride which contains Sm and Fe, in which the molded rare-earth magnet has a density of 80% or higher of the theoretical density of a molded magnet constituted of the rare-earth magnet phase, and has a structure in which particles of Zn and/or Mn have been dispersed in the molded magnet.Type: ApplicationFiled: November 27, 2012Publication date: November 27, 2014Applicant: Nissan Motor Co., Ltd.Inventors: Yoshio Kawashita, Kazuhiko Takashima, Yoshitaka Uehara, Toshikazu Nanbu, Kiyohiro Uramoto
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Publication number: 20140348576Abstract: In joining members to be joined (1, 1) by heating the members to be joined (1, 1) that are mated with intervening an insert (2) while applying opposing loads to the members to be joined (1, 1), so as to allow eutectic reaction to occur between the members to be joined (1, 1) and the insert (2) to discharge a eutectic melt from a joining plane along with an oxide film (1a) of the members to be joined, the members to be joined (1) are brought into contact with the insert (2) so that the oxide film (1a) is broken by a stress concentrating means previously provided at least one of joining portions breaks to produce a starting point of the eutectic reaction.Type: ApplicationFiled: July 10, 2012Publication date: November 27, 2014Inventors: Shigeyuki Nakagawa, Yoshitaka Uehara, Chika Yamamoto, Kenji Miyamoto, Toshikazu Nanbu
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Publication number: 20140312523Abstract: A thick magnet film contains a rare earth magnet phase represented by formula R-M-X, where R contains at least one of Nd and Sm, M contains at least one of Fe and Co, and X contains at least one of N and B. The thick magnet film has a density of equal to or more than 80% but less than 95% of the theoretical density when R contains Nd as a main component and has the density of equal to or more than 80% but less than 97% of the theoretical density when R contains Sm as a main component. The magnet can achieve an increase in thickness when formed into a film, an increase in density and an improvement in magnetic properties such as residual magnetic flux density.Type: ApplicationFiled: October 22, 2012Publication date: October 23, 2014Inventors: Yoshio Kawashita, Kazuhiko Takashima, Toshikazu Nanbu
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Publication number: 20140141932Abstract: A high durability roller, a manufacturing method thereof and a power transmission device with the high durability roller are provided. The roller for a power transmission device that comprises a plurality of rollers in contact with each other directly or with lubricant between them, includes: a metal base having a Young's modulus of 220 GPa or less; and a coating that is formed on a surface of the metal base, includes hard particles and a metal component composed of at least either simple metal or alloy, and has a Young's modulus of 250 GPa or more. The power transmission device includes the roller. The method of manufacturing the roller includes: forming the coating on the surface of the metal base by thermal spraying using a thermal spray material that comprises the hard particles and the metal component composed of at least either simple metal or alloy.Type: ApplicationFiled: July 4, 2012Publication date: May 22, 2014Inventors: Kazuhiko Takashima, Toshikazu Nanbu, Kazunori Sakata, Kouji Tagomori, Naoki Sugiyama
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Publication number: 20140030634Abstract: An inexpensive bonding method is provided to bond materials constituted of an aluminum-based metal to each other at a low temperature and a low pressure while inhibiting deformation, without requiring the use of a flux and minimizing the influence on the base materials and the periphery. Also provided are various bonded parts obtained by the bonding method. An insert material comprising Zn as an element that undergoes a eutectic reaction with Al is interposed between two materials constituted of an aluminum-based metal. The two materials are heated, while being pressed against each other, to a temperature at which the eutectic reaction takes place, thereby generating, at the bonding interface between the two materials, a melt due to the eutectic reaction with some of the Al contained in the base materials and discharging the Al oxide films from the bonding interface together with the melt. Thus, the two materials are bonded.Type: ApplicationFiled: August 30, 2011Publication date: January 30, 2014Applicant: NISSAN MOTOR CO., LTD.Inventors: Toshikazu Nanbu, Kenji Miyamoto, Masayuki Inoue, Chika Yamamoto, Yoshitaka Uehara, Akio Hirose
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Publication number: 20130323531Abstract: A bonded body of electrically conductive materials including a bonding interface structure in which paired bonded members (10, 20) made respectively of electrically conductive materials are surface-bonded to each other. The bonding interface structure has at least: a diffusion bonding region in which the electrically conductive materials are mutually diffused; and a plastic flow bonding region which has a pressure bonded and recrystallized structure through plastic flow of the electrically conductive materials.Type: ApplicationFiled: December 5, 2011Publication date: December 5, 2013Inventors: Shigeyuki Nakagawa, Toshikazu Nanbu, Chika Yamamoto, Tooru Fukami
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Patent number: 8202004Abstract: There is provided a low-friction sliding member having a sliding surface slidable relative to an opposing member via an oil, wherein the sliding surface has a plurality of texture groups, each of the texture groups consists of at least two adjacent fine recesses having portions aligned to each other in either a sliding direction or oil flow direction; a distance between the texture groups is larger than a distance between the adjacent recesses; and the texture groups is distributed uniformly over the sliding surface.Type: GrantFiled: December 27, 2006Date of Patent: June 19, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Yousuke Koizuka, Yoshiteru Yasuda, Toshikazu Nanbu, Tokio Sakane, Yoshitaka Uehara, Kazuhiko Takashima, Minoru Ota
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Publication number: 20100150482Abstract: According to one aspect of the present invention, there is provided a low-friction sliding member having a sliding surface slidable relative to an opposing member via an oil, wherein the sliding surface has a plurality of texture groups, each of the texture groups consists of at least two adjacent fine recesses having portions aligned to each other in either a sliding direction or oil flow direction; a distance between the texture groups is larger than a distance between the adjacent recesses; and the texture groups is distributed uniformly over the sliding surface.Type: ApplicationFiled: December 27, 2006Publication date: June 17, 2010Inventors: Yousuke Koizuka, Yoshiteru Yasuda, Toshikazu Nanbu, Tokio Sakane, Yoshitaka Uehara, Kazuhiko Takashima, Minoru Ota
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Publication number: 20080076684Abstract: A low-friction sliding mechanism includes a pair of sliding members having respective sliding surfaces slidable relative to each other and an ionic liquid applied to the respective sliding surfaces. At least one of the sliding surfaces has a coating of either a diamond-like carbon material, a diamond material or a combination thereof. The ionic liquid consists of cation and anion components and exists in liquid or gel form at room temperature.Type: ApplicationFiled: September 19, 2007Publication date: March 27, 2008Inventors: Toshikazu NANBU, Yoshiteru Yasuda, Takafumi Ueno, Tokio Sakane, Toshihiro Takekawa
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Publication number: 20070292057Abstract: A sliding structure is provided with at least a first sliding member that has a sliding surface and a plurality of micro-recessed parts with bottom surfaces having a maximum depth point spaced from the sliding surface to define a plurality of recesses. Each bottom surfaces includes a concaved portion extending rearward with respect to a sliding direction from the maximum depth point. Each micro-recessed parts has a cross-sectional shape in the sliding direction has an S/L ratio of 0 to 0.3, where L is an overall length of the micro-recessed part with respect to the sliding surface in the sliding direction and S is a length from a forward edge of the micro-recessed part with respect to the sliding surface in the sliding direction to the maximum depth point. The sliding member slide with respect to another sliding member with a viscous fluid interposed therebetween.Type: ApplicationFiled: June 11, 2007Publication date: December 20, 2007Applicant: Nissan Motor Co., Ltd.Inventors: Toshikazu Nanbu, Yoshiteru Yasuda, Yousuke Koizuka, Tokio Sakane
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Patent number: 7270482Abstract: A sliding device is comprised of a first sliding member which is rotatable on an axis of the first sliding member, a second sliding member which slidably supports the first member through viscous fluid and at least a pit which is formed on a surface of at least one of the first and second sliding members so as to promote a viscous fluid flow, which has a component of a rotational direction of the shaft when the first member is rotated.Type: GrantFiled: January 28, 2005Date of Patent: September 18, 2007Assignee: Nissan Motor Co., Ltd.Inventors: Toshikazu Nanbu, Yoshiteru Yasuda, Yousuke Koiduka