Patents by Inventor Natsuhiko Mori
Natsuhiko Mori 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: 20160012954Abstract: An electric circuit-use core which has low loss, is less susceptible to magnetic saturation, thus allows for size reduction and current increase, and has a wide operation range in high-frequency region, and a manufacturing method for the core are provided. The electric circuit-use core is a dust core formed by compression molding or injection molding with an iron-based amorphous material, a cobalt-based amorphous material, or a sendust material as a magnetic material, and is used as a transformer core, a choke core, or a core of a reactor. The electric circuit-use core includes cylindrical pillar portions and connection portions.Type: ApplicationFiled: September 22, 2015Publication date: January 14, 2016Applicant: NTN CORPORATIONInventors: Hiroyuki NODA, Natsuhiko MORI, lkuo UEMOTO
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Patent number: 9200670Abstract: With use of a fine copper-based powder, specifically a copper-based powder that contains particles each having a diameter of 45 ?m or less by 80 weight % or more, an air permeability can be significantly reduced. When this copper-based powder is used, a sintered metal can be easily formed to contain copper by 40% or less (contain iron by 60% or more) to enhance abrasion resistance, and to have an oil permeability of 1.00 g/10 min or less to increase an oil film formation rate.Type: GrantFiled: September 2, 2011Date of Patent: December 1, 2015Assignee: NTN CORPORATIONInventors: Fuyuki Ito, Natsuhiko Mori
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Patent number: 9154012Abstract: Providing a fluid dynamic bearing device, wherein the outer member comprises a member formed by a pressing process on a plate member, the radial bearing surface and at least the one of the thrust bearing surfaces of the outer member being formed by the pressing process, and wherein at least a part of the inner member, which forms the radial bearing surface and the thrust bearing surfaces of the inner member, is made of a sintered metal.Type: GrantFiled: March 28, 2011Date of Patent: October 6, 2015Assignee: NTN CORPORATIONInventors: Masaharu Hori, Jun Hirade, Tatsuya Hayashi, Yasuhiro Yamamoto, Natsuhiko Mori, Fuminori Satoji, Toshiaki Niwa, Tetsuya Kurimura, Kimihiko Bito
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Publication number: 20150270050Abstract: The present invention provides a magnetic core which can be produced with improved productivity without increasing a material cost and has required magnetic and mechanical properties and a process for producing the same. The magnetic core is produced by compression molding and thereafter thermally hardening iron-based soft magnetic powder having resin films formed on surfaces of particles thereof. The resin film is an uncured resin film formed by dry mixing the iron-based soft magnetic powder and epoxy resin containing a latent curing agent with each other at a temperature not less than a softening temperature of the epoxy resin and less than a thermal curing starting temperature thereof. The iron-based soft magnetic powder having the resin films formed on the surfaces of the particles thereof is compression molded by using a die to produce a compression molded body.Type: ApplicationFiled: September 27, 2013Publication date: September 24, 2015Inventors: Ikuo Uemoto, Shinji Miyazaki, Takuji Harano, Natsuhiko Mori, Hiroyuki Noda
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Patent number: 9133886Abstract: A constant-velocity universal joint includes an outer joint member; an inner joint member arranged in an inside of the outer joint member; and torque transmitting members. At least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members. At least one of the components of the constant-velocity universal joint is formed of a metal sintered compact. The metal sintered compact has a relative density of 80% or more and less than 100%. The metal sintered compact comprises a hardened layer formed on a surface thereof through heat treatment. Among the components each formed of the metal sintered compact, a component having a ring shape is subjected to a cold rolling process.Type: GrantFiled: February 28, 2012Date of Patent: September 15, 2015Assignee: NTN CORPORATIONInventors: Mika Kohara, Tatsuro Sugiyama, Natsuhiko Mori, Hiroyuki Noda, Takahiro Okuno, Hajime Asada
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Patent number: 9127710Abstract: A bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing (4) includes an inner member (5) having a mounting surface (9) with respect to a rotary shaft (2), and an outer member (6) being arranged on a radially outer side of the inner member (5). A radial bearing gap is formed between an outer peripheral surface (5a1) of the inner member (5) and an inner peripheral surface (7a1) of the outer member (6), and a lubricating oil is interposed in the radial bearing gap. Further, between the inner member (5) and the outer member (6), sealing gaps (S, S) for maintaining an oil level of the lubricating oil on both axial sides of the radial bearing gap are formed. At least a part of the mounting surface (9) of the inner member (5) is made of a metal.Type: GrantFiled: April 7, 2014Date of Patent: September 8, 2015Assignee: NTN CORPORATIONInventors: Masaharu Hori, Natsuhiko Mori, Wei Shin Sim
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Publication number: 20150229027Abstract: Provided is a waveguide tube slot antenna (1) including: a plurality of waveguides (2) arranged in parallel with each other; a plurality of radiating slots (3) formed along each of the plurality of waveguides (2); and a plurality of waveguide tubes (10) connected in parallel with each other, in which the plurality of waveguide tubes (10) each include a first waveguide tube forming member (11) and a second waveguide tube forming member (12) each having a transverse section having a shape with an end, the first waveguide tube forming member and the second waveguide tube forming member being configured to define one of the plurality of waveguides (2) by being connected to each other.Type: ApplicationFiled: July 25, 2013Publication date: August 13, 2015Applicant: NTN CORPORATIONInventors: Tomokazu Sonozaki, Hiroyuki Noda, Natsuhiko Mori
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Patent number: 9003664Abstract: A shaft material integrally having a shaft portion and a flange portion is formed by a forging process. The end face of the shaft portion of the shaft material and the end face of the flange portion on the opposite side of the shaft portion are ground relative to the corrected face, and the outer circumferential surface of the shaft material is ground relative to the end faces. This renders the cylindricity of the radial bearing faces formed on the outer periphery of the shaft portion of the produced shaft member to be 3 ?m or lower. Moreover, a shaft material integrally having the shaft portion and flange portion is formed, while simultaneously thrust hydrodynamic groove regions are formed on both end faces of the flange portion. After the forging process, radial hydrodynamic groove regions are formed on the outer circumferential surface of the shaft portion.Type: GrantFiled: May 31, 2011Date of Patent: April 14, 2015Assignees: NTN Corporation, Fukui Byora Co., Ltd.Inventors: Nobuyoshi Yamashita, Hideaki Kubota, Natsuhiko Mori, Keiji Nagasaki, Masahiro Makino
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Publication number: 20150064045Abstract: Provided is a sintered bearing (1), including 3 to 12% by mass of aluminum, 0.05 to 0.5% by mass of phosphorus, and the balance including copper as a main component, and inevitable impurities, the sintered bearing (1) having a structure in which an aluminum-copper alloy is sintered with a sintering aid added to raw material powder, a pore (db, do) in a surface layer portion of the sintered bearing (1) being formed smaller than an internal pore (di).Type: ApplicationFiled: March 13, 2013Publication date: March 5, 2015Applicant: NTN CORPORATIONInventors: Makoto Jinnou, Natsuhiko Mori, Yoshinori Ito
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Patent number: 8931175Abstract: It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves (8a1) and (8a2) are formed as the dynamic pressure generating portions on an inner circumferential surface of the electroforming portion (10) by an electroforming process, and injection molding is performed by using a resin while inserting the electroforming portion (10), thereby forming a bearing member (8). A shaft member (2) is inserted into an inner circumference of the bearing member.Type: GrantFiled: March 30, 2012Date of Patent: January 13, 2015Assignee: NTN CorporationInventors: Natsuhiko Mori, Nobuyoshi Yamashita, Fuminori Satoji, Isao Komori, Toshiyuki Mizutani, Masafumi Okuma, Kenichi Mitani
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Patent number: 8926183Abstract: An inner peripheral surface and a lower end surface of a bearing sleeve made of a sintered metal are each formed into a smooth cylindrical surface or a flat surface that does not have a dynamic pressure generating portion. Thus, a step of forming the dynamic pressure generating portion can be omitted from a manufacturing step of the bearing sleeve, and cost of dies can be markedly reduced. Further, the inner peripheral surface of the bearing sleeve is formed into the smooth cylindrical surface, and hence a radial dynamic pressure generating portion is formed on an outer peripheral surface of a shaft member. However, the outer peripheral surface of the shaft portion is accessible to tools, and hence the radial dynamic pressure generating portion can be formed easily with high accuracy. As a result, accuracy of a radial bearing gap is enhanced so that a bearing rigidity is enhanced.Type: GrantFiled: February 28, 2012Date of Patent: January 6, 2015Assignee: NTN CorporationInventors: Hiroyuki Noda, Natsuhiko Mori, Tetsuya Kurimura, Isao Komori, Masaharu Hori, Kimihiko Bito, Toshiyuki Mizutani
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Publication number: 20140270606Abstract: A bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing (4) includes an inner member (5) having a mounting surface (9) with respect to a rotary shaft (2), and an outer member (6) being arranged on a radially outer side of the inner member (5). A radial bearing gap is formed between an outer peripheral surface (5a1) of the inner member (5) and an inner peripheral surface (7a1) of the outer member (6), and a lubricating oil is interposed in the radial bearing gap. Further, between the inner member (5) and the outer member (6), sealing gaps (S, S) for maintaining an oil level of the lubricating oil on both axial sides of the radial bearing gap are formed. At least a part of the mounting surface (9) of the inner member (5) is made of a metal.Type: ApplicationFiled: April 7, 2014Publication date: September 18, 2014Applicant: NTN CORPORATIONInventors: Masaharu Hori, Natsuhiko Mori, Wei Shin Sim
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Patent number: 8746977Abstract: Provided is a bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing (4) includes an inner member (5) having a mounting surface (9) with respect to a rotary shaft (2), and an outer member (6) being arranged on a radially outer side of the inner member (5). A radial bearing gap is formed between an outer peripheral surface (5a1) of the inner member (5) and an inner peripheral surface (7a1) of the outer member (6), and a lubricating oil is interposed in the radial bearing gap. Further, between the inner member (5) and the outer member (6), sealing gaps (S, S) for maintaining an oil level of the lubricating oil on both axial sides of the radial bearing gap are formed. At least a part of the mounting surface (9) of the inner member (5) is made of a metal.Type: GrantFiled: July 30, 2010Date of Patent: June 10, 2014Assignee: NTN CorporationInventors: Masaharu Hori, Natsuhiko Mori, Wei Shin Sim
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Patent number: 8678653Abstract: A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product.Type: GrantFiled: June 30, 2010Date of Patent: March 25, 2014Assignees: NTN Corporation, Fukui Byora Co., Ltd.Inventors: Nobuyoshi Yamashita, Natsuhiko Mori, Toshiyuki Mizytani, Takeshi Shimazaki, Koji Yamagata
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Publication number: 20140038732Abstract: A constant-velocity universal joint includes an outer joint member; an inner joint member arranged in an inside of the outer joint member; and torque transmitting members. At least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members. At least one of the components of the constant-velocity universal joint is formed of a metal sintered compact. The metal sintered compact has a relative density of 80% or more and less than 100%. The metal sintered compact comprises a hardened layer formed on a surface thereof through heat treatment. Among the components each formed of the metal sintered compact, a component having a ring shape is subjected to a cold rolling process.Type: ApplicationFiled: February 28, 2012Publication date: February 6, 2014Applicant: NTN CORPORATIONInventors: Mika Kohara, Tatsuro Sugiyama, Natsuhiko Mori, Hiroyuki Noda, Takahiro Okuno, Hajime Asada
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Publication number: 20130336604Abstract: An inner peripheral surface and a lower end surface of a bearing sleeve made of a sintered metal are each formed into a smooth cylindrical surface or a flat surface that does not have a dynamic pressure generating portion. Thus, a step of forming the dynamic pressure generating portion can be omitted from a manufacturing step of the bearing sleeve, and cost of dies can be markedly reduced. Further, the inner peripheral surface of the bearing sleeve is formed into the smooth cylindrical surface, and hence a radial dynamic pressure generating portion is formed on an outer peripheral surface of a shaft member. However, the outer peripheral surface of the shaft portion is accessible to tools, and hence the radial dynamic pressure generating portion can be formed easily with high accuracy. As a result, accuracy of a radial bearing gap is enhanced so that a bearing rigidity is enhanced.Type: ApplicationFiled: February 28, 2012Publication date: December 19, 2013Applicant: NTN CORPORATIONInventors: Hiroyuki Noda, Natsuhiko Mori, Tetsuya Kurimura, Isao Komori, Masaharu Hori, Kimihiko Bito, Toshiyuki Mizutani
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Publication number: 20130207849Abstract: After a three-dimensional antenna pattern (10) is formed by bending a conductive plate, the three-dimensional antenna pattern (10) thus bent is supplied in an injection molding die set as an insert component and a base (20) is formed by injection molding of a resin. With this, a chip antenna (1) comprising the three-dimensional antenna pattern (10) can be formed easier as comparison to a case where the antenna pattern is formed over a plurality of surfaces by printing and the like.Type: ApplicationFiled: September 2, 2011Publication date: August 15, 2013Inventors: Katsuo Shibahara, Natsuhiko Mori, Tatsuya Hayashi
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Publication number: 20130182979Abstract: With use of a fine copper-based powder, specifically a copper-based powder that contains particles each having a diameter of 45 ?m or less by 80 weight % or more, an air permeability can be significantly reduced. When this copper-based powder is used, a sintered metal can be easily formed to contain copper by 40% or less (contain iron by 60% or more) to enhance abrasion resistance, and to have an oil permeability of 1.00 g/10 min or less to increase an oil film formation rate.Type: ApplicationFiled: September 2, 2011Publication date: July 18, 2013Applicant: NTN CORPORATIONInventors: Fuyuki Ito, Natsuhiko Mori
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Patent number: 8387246Abstract: A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product.Type: GrantFiled: April 20, 2011Date of Patent: March 5, 2013Assignees: NTN Corporation, Fukui Byora Co., Ltd.Inventors: Nobuyoshi Yamashita, Natsuhiko Mori, Toshiyuki Mizutani, Takeshi Shimazaki, Koji Yamagata
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Publication number: 20120315169Abstract: Providing a fluid dynamic bearing device, wherein the outer member comprises a member formed by a pressing process on a plate member, the radial bearing surface and at least the one of the thrust bearing surfaces of the outer member being formed by the pressing process, and wherein at least a part of the inner member, which forms the radial bearing surface and the thrust bearing surfaces of the inner member, is made of a sintered metal.Type: ApplicationFiled: March 28, 2011Publication date: December 13, 2012Applicant: NTN CORPORATIONInventors: Masaharu Hori, Jun Hirade, Tatsuya Hayashi, Yasuhiro Yamamoto, Natsuhiko Mori, Fuminori Satoji, Toshiaki Niwa, Tetsuya Kurimura, Kimihiko Bito