Patents by Inventor Tomomi Goto
Tomomi Goto 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: 20170133916Abstract: A power generator includes: an output iron core having an output winding wound therearound; and a field iron core having a main field winding and an auxiliary field winding wound therearound, and is a self-excitation type in which one of the output iron core and the field iron core serves as a stator and the other serves as a rotor, the main field windin is connected to a first rectifying element, the auxiliary field winding is connected to a second rectifying element, and power is generated by relative rotation of the stator and the rotor. The power generator is provided with an initial excitation unit configured to apply, to one or both of the output iron core and the field iron core, a magnetic force to a degree required for initial excitation in power generation.Type: ApplicationFiled: January 23, 2017Publication date: May 11, 2017Applicant: NTN CORPORATIONInventors: Masatoshi MIZUTANI, Hiroyuki Noda, Natsuhiko Mori, Ryousuke Karasawa, Tomomi Goto, Yuuki Shimura
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Patent number: 9574630Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: GrantFiled: October 8, 2015Date of Patent: February 21, 2017Assignee: NTN CorporationInventors: Makoto Muramatsu, Masaaki Eguchi, Tatsuya Yamasaki, Tomomi Goto
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Publication number: 20160025170Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: ApplicationFiled: October 8, 2015Publication date: January 28, 2016Applicant: NTN CORPORATIONInventors: Makoto MURAMATSU, Masaaki EGUCHI, Tatsuya YAMASAKI, Tomomi GOTO
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Patent number: 9188183Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: GrantFiled: August 31, 2011Date of Patent: November 17, 2015Assignee: NTN CORPORATIONInventors: Makoto Yasui, Makoto Muramatsu, Masaaki Eguchi, Tatsuya Yamasaki, Tomomi Goto
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Patent number: 9182021Abstract: A disk brake system includes a disk, brake pads, and a linear motion actuator including an electric motor, a rotary shaft coupled to the motor through a reduction gear mechanism, planetary rollers formed with helical grooves in their outer surfaces, and an outer ring member having a helical rib engaged in the helical grooves. The outer ring is coupled to one of the brake pads. When the rotary shaft is rotated by the motor, the outer ring member is moved axially through the planetary rollers, and the brake pads are pressed against the disk. The linear motion actuator further includes a locking mechanism including engaging holes formed in an intermediate gear of the reduction gear mechanism at equal intervals, a locking pin, and a linear solenoid for moving the locking pin until the pin engages in one of the engaging holes, thus locking the motor.Type: GrantFiled: October 17, 2011Date of Patent: November 10, 2015Assignee: NTN CORPORATIONInventors: Makoto Muramatsu, Tatsuya Yamasaki, Masaaki Eguchi, Tomomi Goto
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Patent number: 9145940Abstract: An electric brake system is proposed which includes an electric linear motion actuator and can generate the required braking force with high accuracy. A load sensor (30) is provided in a motion converting mechanism of the actuator which converts the rotary motion of a rotary shaft (4) to which the rotation of an electric motor (2) is transmitted to linear motion of an outer ring member (5) as an output member. The load sensor (30) detects the pushing force with which the outer ring member (5) linearly drives a driven member. With this arrangement, if the driven member is a braking member of an electric brake system, it is possible to directly detect the braking force applied by the driven member and thus to accurately generate the required braking force.Type: GrantFiled: April 27, 2011Date of Patent: September 29, 2015Assignee: NTN CorporationInventors: Makoto Muramatsu, Tatsuya Yamasaki, Masaaki Eguchi, Tomomi Goto
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Publication number: 20140354044Abstract: A power line (51) provided to a vehicle that drives a wheel assembly (21) by a motor (12) and connected to the motor (12) so as to be exposed outside the vehicle body (41) is covered with a protective member (52) which has mesh-type ventilating opening.Type: ApplicationFiled: December 21, 2012Publication date: December 4, 2014Inventors: Tomomi Goto, Ryou Yukishima
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Publication number: 20130186717Abstract: A disk brake system includes a disk, brake pads, and a linear motion actuator including an electric motor, a rotary shaft coupled to the motor through a reduction gear mechanism, planetary rollers formed with helical grooves in their outer surfaces, and an outer ring member having a helical rib engages in the helical grooves. The outer ring is coupled to one of the brake pads. When the rotary shaft is rotated by the motor, the outer ring member is moved axially through the planetary rollers, and the brake pads are pressed against the disk. The linear motion actuator further includes a locking mechanism including engaging holes formed in an intermediate gear of the reduction gear mechanism at equal intervals, a locking pin, and a linear solenoid for moving the locking pin until the pin engages in one of the engaging holes, thus locking the motor.Type: ApplicationFiled: October 17, 2011Publication date: July 25, 2013Inventors: Makoto Muramatsu, Tatsuya Yamasaki, Masaaki Eguchi, Tomomi Goto
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Publication number: 20130168192Abstract: An electric linear motion actuator is proposed which includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: ApplicationFiled: August 31, 2011Publication date: July 4, 2013Inventors: Makoto Yasui, Makoto Muramatsu, Masaaki Eguchi, Tatsuya Yamasaki, Tomomi Goto
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Publication number: 20130048443Abstract: An electric brake system is proposed which includes an electric linear motion actuator and can generate the required braking force with high accuracy. A load sensor (30) is provided in a motion converting mechanism of the actuator which converts the rotary motion of a rotary shaft (4) to which the rotation of an electric motor (2) is transmitted to linear motion of an outer ring member (5) as an output member. The load sensor (30) detects the pushing force with which the outer ring member (5) linearly drives a driven member. With this arrangement, if the driven member is a braking member of an electric brake system, it is possible to directly detect the braking force applied by the driven member and thus to accurately generate the required braking force.Type: ApplicationFiled: April 27, 2011Publication date: February 28, 2013Inventors: Makoto Muramatsu, Tatsuya Yamasaki, Masaaki Eguchi, Tomomi Goto