Patents by Inventor Tatsuhiro Yamamoto
Tatsuhiro Yamamoto 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: 20210107615Abstract: A steering gear for a boat includes a steering mechanism that moves a rudder, and a driving source. The steering mechanism has: a housing that is fixed to a hull; an output shaft that is rotatably supported by the housing; a first conversion mechanism that is provided inside the housing and converts power from the driving source into rotation of the output shaft; and a second conversion mechanism that is provided outside the housing and converts rotation of the output shaft into motion of the rudder.Type: ApplicationFiled: October 8, 2020Publication date: April 15, 2021Applicant: JTEKT CORPORATIONInventors: Taiki TAKEUCHI, Kyoji YOSHIMURA, Yasuharu YAMAMOTO, Tatsuhiro YAMAMOTO
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Patent number: 10717461Abstract: A steering apparatus includes a steered shaft; a rack housing; a ball screw nut; a bearing disposed between an inner peripheral surface of the rack housing and an outer peripheral surface of the ball screw nut, the bearing supporting the ball screw nut such that the ball screw nut is rotatable with respect to the rack housing; and a tubular rack boot covering an axial end portion of the rack housing. The rack housing includes a partition wall protruding radially inward from a cylindrical inner peripheral surface of the rack housing and separating a ball screw chamber housing the ball screw nut and an inner chamber of the rack boot. The partition wall has a through-hole through which the steered shaft extends, and a drain passage provided vertically below the through-hole and providing communication between the ball screw chamber and the inner chamber of the rack boot.Type: GrantFiled: November 27, 2017Date of Patent: July 21, 2020Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayoshi Asakura, Tatsuhiro Yamamoto, Masafumi Takahashi, Yoshiaki Asahara
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Patent number: 10544181Abstract: A novel gelator including a sugar derivative; a gelator including a compound of Formula (1) or Formula (2): wherein R1 is a linear or branched alkyl group having a carbon atom number of 9 to 20, a cyclic alkyl group having a carbon atom number of 13 to 20, or a linear or branched alkenyl group having a carbon atom number of 9 to 20, R2 is a hydrogen atom, a linear or branched alkyl group having a carbon atom number of 1 to 10, or an aryl group optionally having a substituent, and R3 and R4 are hydroxy groups.Type: GrantFiled: August 25, 2016Date of Patent: January 28, 2020Assignees: KYUSHU UNIVERSITY, INSTITUTE OF SYSTEMS, INFORMATION TECHNOLOGIES AND NANOTECHNOLOGIES, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Fumiyasu Ono, Koichiro Saruhashi, Osamu Hirata, Seiji Shinkai, Tatsuhiro Yamamoto
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Publication number: 20180280296Abstract: A stable high-water-content W/O-type emulsion gel comprising: a gelator composed of a compound of Formula (1) or (2) below (wherein, R1 and R3 are each independently a linear or branched alkyl group having a carbon atom number of 1 to 20, a cyclic alkyl group having a carbon atom number of 3 to 20, or a linear or branched alkenyl group having a carbon atom number of 2 to 20, n is an integer of 0 or 1 to 4, R2 is a hydrogen atom, a linear or branched alkyl group having a carbon atom number of 1 to 10, or an aryl group optionally having a substituent, and R4 and R5 are a hydroxyl group); a surfactant; and a mixed solvent of a hydrophobic organic solvent and water, wherein the content of the gelator is 0.1-20% by mass with respect to the mass of the mixed solvent.Type: ApplicationFiled: August 25, 2016Publication date: October 4, 2018Applicants: NISSAN CHEMICAL INDUSTRIES, LTD., KYUSHU UNIVERSITY, INSTITUTE OF SYSTEMS, INFORMATION TECHNOLOGIES AND NANOTECHNOLOGIESInventors: Koichiro SARUHASHI, Osamu HIRATA, Fumiyasu ONO, Seiji SHINKAI, Tatsuhiro YAMAMOTO
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Publication number: 20180208618Abstract: A novel gelator including a sugar derivative; a gelator including a compound of Formula (1) or Formula (2): wherein R1 is a linear or branched alkyl group having a carbon atom number of 9 to 20, a cyclic alkyl group having a carbon atom number of 13 to 20, or a linear or branched alkenyl group having a carbon atom number of 9 to 20, R2 is a hydrogen atom, a linear or branched alkyl group having a carbon atom number of 1 to 10, or an aryl group optionally having a substituent, and R3 and R4 are hydroxy groups.Type: ApplicationFiled: August 25, 2016Publication date: July 26, 2018Applicants: KYUSHU UNIVERSITY, Institute of Systems, Information Technologies and Nanotechnologies, NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Fumiyasu ONO, Koichiro SARUHASHI, Osamu HIRATA, Seiji SHINKAI, Tatsuhiro YAMAMOTO
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Publication number: 20180162439Abstract: A steering apparatus includes a steered shaft; a rack housing; a ball screw nut; a bearing disposed between an inner peripheral surface of the rack housing and an outer peripheral surface of the ball screw nut, the bearing supporting the ball screw nut such that the ball screw nut is rotatable with respect to the rack housing; and a tubular rack boot covering an axial end portion of the rack housing. The rack housing includes a partition wall protruding radially inward from a cylindrical inner peripheral surface of the rack housing and separating a ball screw chamber housing the ball screw nut and an inner chamber of the rack boot. The partition wall has a through-hole through which the steered shaft extends, and a drain passage provided vertically below the through-hole and providing communication between the ball screw chamber and the inner chamber of the rack boot.Type: ApplicationFiled: November 27, 2017Publication date: June 14, 2018Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayoshi ASAKURA, Tatsuhiro YAMAMOTO, Masafumi TAKAHASHI, Yoshiaki ASAHARA
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Patent number: 8882148Abstract: A steering system includes a steering column which supports rotatably a steering shaft to which a steering wheel is connected and a pair of support mechanisms which support the steering column so as to tilt relative to a vehicle body. Each of the support mechanisms includes a support bracket having a column-side fastened portion and a body-side fastened portion, a fulcrum bolt, and a bush. A fastening hole through which a fastening bolt is inserted to fasten the support bracket to a fixed member is formed in the body-side fastened portion. Each of the support mechanisms includes an elastic member which can be compressed in an axial direction of the fulcrum bolt, and the support bracket is configured to oscillate relative to the steering column by the elastic member being compressed.Type: GrantFiled: January 6, 2012Date of Patent: November 11, 2014Assignees: JTEKT Corporation, Toyota Jidosha Kabushiki KaishaInventors: Yoshihide Ohara, Tatsuhiro Yamamoto, Hiroshi Kawakami, Toru Suzuki
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Publication number: 20130305871Abstract: A steering system includes a steering column which supports rotatably a steering shaft to which a steering wheel is connected and a pair of support mechanisms which support the steering column so as to tilt relative to a vehicle body. Each of the support mechanisms includes a support bracket having a column-side fastened portion and a body-side fastened portion, a fulcrum bolt, and a bush. A fastening hole through which a fastening bolt is inserted to fasten the support bracket to a fixed member is formed in the body-side fastened portion. Each of the support mechanisms includes an elastic member which can be compressed in an axial direction of the fulcrum bolt, and the support bracket is configured to oscillate relative to the steering column by the elastic member being compressed.Type: ApplicationFiled: January 6, 2012Publication date: November 21, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATIONInventors: Yoshihide Ohara, Tatsuhiro Yamamoto, Hiroshi Kawakami, Toru Suzuzki
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Publication number: 20110186785Abstract: There is provided a method for producing a nanocarbon material dispersion in which individual nanocarbon materials are separated from each other by mild processing. The method for producing a nanocarbon material dispersion of the present invention is characterized by including a step of preparing a composition by mixing a nanocarbon material with a dispersion medium comprising an amphiphilic triphenylene derivative, and a step of subjecting the composition to a mechanical dispersing processing.Type: ApplicationFiled: February 13, 2009Publication date: August 4, 2011Inventors: Masaru Kato, Shigeo Maruyama, Takuzo Aida, Takanori Fukushima, Tatsuhiro Yamamoto, Yuhei Miyauchi
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Patent number: 7368099Abstract: An MRI contrast agent enables direct detection and imaging of exfoliated vascular endothelial sites. The MRI contrast agent includes an imaging unit which contains an unpaired electron-carrying atom and/or molecule and is capable of amplifying or reducing MRI signals, and a detection unit which is bonded to the imaging unit and is capable of selectively recognizing exfoliated vascular endothelial sites and binding thereto.Type: GrantFiled: February 3, 2004Date of Patent: May 6, 2008Assignee: Kyushu University, National University CorporationInventors: Yoshiki Katayama, Hiroaki Shimokawa, Tatsuhiro Yamamoto
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Publication number: 20060153773Abstract: Disclosed is an MRI contrast agent which enables direct detection and imaging of exfoliated vascular endothelial sites. The MRI contrast agent comprises an imaging unit which contains an unpaired electron-carrying atom and/or molecule and is capable of amplifying or reducing MRI signals, and a detection unit which is bonded to said imaging unit and is capable of selectively recognizing exfoliated vascular endothelial sites and binding thereto.Type: ApplicationFiled: February 3, 2004Publication date: July 13, 2006Inventors: Yoshiki Katayama, Hiroaki Shimokawa, Tatsuhiro Yamamoto
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Patent number: 7014009Abstract: A motor operated power steering device which transmits rotational force from a steering assistance motor to a steering shaft by way of a gear fitted around the outer circumference of the steering shaft. A torque limiter fitted in between the steering shaft and the gear comprises a torque setting member, which is subject to diametric deformation as a result of being fitted in between the outer circumference of the steering shaft and the inner circumference of the gear. Diametric force is applied to the steering shaft and the gear in accordance with the diametric deformation of the torque setting member. The limit torque value of the torque limiter corresponds to the diametric deformation of the torque setting member.Type: GrantFiled: October 8, 2004Date of Patent: March 21, 2006Assignee: Koyo Seiko Co., Ltd.Inventors: Tatsuhiro Yamamoto, Manabu Takaoka
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Publication number: 20050077101Abstract: A motor operated power steering device which transmits rotational force from a steering assistance motor to a steering shaft by way of a gear fitted around the outer circumference of the steering shaft. A torque limiter fitted in between the steering shaft and the gear comprises a torque setting member, which is subject to diametric deformation as a result of being fitted in between the outer circumference of the steering shaft and the inner circumference of the gear. Diametric force is applied to the steering shaft and the gear in accordance with the diametric deformation of the torque setting member. The limit torque value of the torque limiter corresponds to the diametric deformation of the torque setting member.Type: ApplicationFiled: October 8, 2004Publication date: April 14, 2005Inventors: Tatsuhiro Yamamoto, Manabu Takaoka
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Patent number: 6854556Abstract: A motor operated power steering device which transmits rotational force from a steering assistance motor to a steering shaft by way of a gear fitted around the outer circumference of the steering shaft. A torque limiter fitted in between the steering shaft and the gear comprises a torque setting member, which is subject to diametric deformation as a result of being fitted in between the outer circumference of the steering shaft and the inner circumference of the gear. Diametric force is applied to the steering shaft and the gear in accordance with the diametric deformation of the torque setting member. The limit torque value of the torque limiter corresponds to the diametric deformation of the torque setting member.Type: GrantFiled: April 22, 1996Date of Patent: February 15, 2005Assignee: Koyo Seiko Co., Ltd.Inventors: Tatsuhiro Yamamoto, Manabu Takaoka
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Patent number: 6708796Abstract: An electric power steering apparatus in which a shaft of a worm interlocking with rotation of a motor for steering assistance is movable in a radial direction, a pressing body for pressing the worm toward a worm wheel is provided, and the pressing body is provided with a V-shaped contact portion to abut in two circumferential positions of the shaft and an annular elastic body for restricting movement of the pressing body in a direction crossing the radial direction.Type: GrantFiled: May 18, 2001Date of Patent: March 23, 2004Assignee: Koyo Seiko Co., Ltd.Inventors: Shigetaka Kinme, Tatsuhiro Yamamoto, Susumu Imagaki, Osamu Sano, Kunihiro Oka, Tomoyuki Takei, Masanori Kobayashi, Yoshio Ito, Tatsuo Otsuka
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Publication number: 20020017420Abstract: An electric power steering apparatus in which a shaft of a worm interlocking with rotation of a motor for steering assistance is movable in a radial direction, a pressing body for pressing the worm toward a worm wheel is provided, and the pressing body is provided with a V-shaped contact portion to abut in two circumferential positions of the shaft and an annular elastic body for restricting movement of the pressing body in a direction crossing the radial direction.Type: ApplicationFiled: May 18, 2001Publication date: February 14, 2002Applicant: KOYO SEIKO CO., LTD.Inventors: Shigetaka Kinme, Tatsuhiro Yamamoto, Susumu Imagaki, Osamu Sano, Kunihiro Oka, Tomoyuki Takei, Masanori Kobayashi, Yoshio Ito, Tatsuo Otsuka