Patents by Inventor Toshiaki Ogata
Toshiaki Ogata 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: 11691667Abstract: A steering device includes two motors each configured to generate a drive force that steers a steerable wheel of a vehicle and two controllers respectively corresponding to the two motors, each of the two controllers being configured to individually control a corresponding one of the motors. One of the two controllers is a first controller, and the other one of the two controllers is a second controller. The first controller is configured to calculate a command value corresponding to a total torque that should be generated in the two motors. The command value is divided into individual command values using a changeable distribution ratio set for each of the motors, the individual command values respectively corresponding to the motors. The two controllers are configured to respectively supply the motors with current corresponding to the individual command values.Type: GrantFiled: August 19, 2020Date of Patent: July 4, 2023Assignee: JTEKT CORPORATIONInventors: Yoshio Kondo, Toshiaki Ogata, Fumio Kishida, Keishi Nakamura, Hirohide Suzuki
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Patent number: 11679801Abstract: A steering device includes a steering rod that includes two ball screw parts, the steering rod being configured to steer a steerable wheel by moving linearly, two ball nuts respectively fastened to the two ball screw parts, two motors each configured to generate a drive force, two transmission mechanisms each including a toothed belt, the two transmission mechanisms being configured to transmit the drive force of each one of the two motors to a corresponding one of the ball nuts, two detectors configured to respectively detect rotation angles of the two motors, and a controller configured to control each of the two motors. The controller is configured to detect tooth jumping of the belts using the rotation angles of the two motors that are detected by the two detectors.Type: GrantFiled: August 19, 2020Date of Patent: June 20, 2023Assignee: JTEKT CORPORATIONInventors: Yoshio Kondo, Toshiaki Ogata, Fumio Kishida, Keishi Nakamura, Hirohide Suzuki
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Patent number: 11639191Abstract: A turning apparatus includes tie rods, a wheel turning shaft, two motors, two ball screws, a transmission mechanism, and two controllers. The wheel turning shaft turns steered wheels of a vehicle. A first controller that is any one of the two controllers computes a current command value and allocates the current command value to the motors at a ratio that varies with a position of the wheel turning shaft in an axial direction. The two controllers each supply any one of the motors, which is an object to be controlled by a corresponding one of the controllers, with a current according to a corresponding of individual current command values.Type: GrantFiled: January 22, 2021Date of Patent: May 2, 2023Assignee: JTEKT CORPORATIONInventors: Toshiaki Ogata, Fumio Kishida, Yoshio Kondo, Keishi Nakamura
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Patent number: 11608106Abstract: A steering system includes a housing, a steering operation shaft that is housed in the housing and configured to move in an axial direction to steer right and left steered wheels, a first drive source that generates a first drive force, a second drive source that generates a second drive force, a first power transfer unit that applies an axial force to the steering operation shaft with the first drive source, a second power transfer unit that applies an axial force to the steering operation shaft with the second drive force, a position detection sensor that is provided in the housing and detects an axial position of the steering operation shaft, and a control device that controls the first drive source and the second drive source using a detection result of the position detection sensor.Type: GrantFiled: April 29, 2020Date of Patent: March 21, 2023Assignee: JTEKT CORPORATIONInventors: Keishi Nakamura, Yoshio Kondo, Toshiaki Ogata, Fumio Kishida
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Patent number: 11554807Abstract: A turning device includes a turning shaft having a first ball screw groove as one of a left screw and a right screw and a second ball screw groove as the other of the left screw and the right screw and turning wheels to be turned by moving in an axial direction, a first electric motor generating a first driving force, a second electric motor operating independently of the first electric motor and generating a second driving force, a first ball screw nut transmitting the first driving force generated by the first electric motor to the first ball screw groove, a second ball screw nut transmitting the second driving force generated by the second electric motor to the second ball screw groove, and a rotation regulating part regulating relative rotation of the turning shaft around an axis with respect to a housing.Type: GrantFiled: February 11, 2020Date of Patent: January 17, 2023Assignee: JTEKT CORPORATIONInventors: Yoshio Kondo, Fumio Kishida, Toshiaki Ogata, Keishi Nakamura, Hirohide Suzuki
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Publication number: 20210229736Abstract: A turning apparatus includes tie rods, a wheel turning shaft, two motors, two ball screws, a transmission mechanism, and two controllers. The wheel turning shaft turns steered wheels of a vehicle. A first controller that is any one of the two controllers computes a current command value and allocates the current command value to the motors at a ratio that varies with a position of the wheel turning shaft in an axial direction. The two controllers each supply any one of the motors, which is an object to be controlled by a corresponding one of the controllers, with a current according to a corresponding of individual current command values.Type: ApplicationFiled: January 22, 2021Publication date: July 29, 2021Applicant: JTEKT CORPORATIONInventors: Toshiaki OGATA, Fumio KISHIDA, Yoshio KONDO, Keishi NAKAMURA
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Publication number: 20210053612Abstract: A steering device includes a steering rod that includes two ball screw parts, the steering rod being configured to steer a steerable wheel by moving linearly, two ball nuts respectively fastened to the two ball screw parts, two motors each configured to generate a drive force, two transmission mechanisms each including a toothed belt, the two transmission mechanisms being configured to transmit the drive force of each one of the two motors to a corresponding one of the ball nuts, two detectors configured to respectively detect rotation angles of the two motors, and a controller configured to control each of the two motors. The controller is configured to detect tooth jumping of the belts using the rotation angles of the two motors that are detected by the two detectors.Type: ApplicationFiled: August 19, 2020Publication date: February 25, 2021Applicant: JTEKT CORPORATIONInventors: Yoshio KONDO, Toshiaki OGATA, Fumio KISHIDA, Keishi NAKAMURA, Hirohide SUZUKI
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Publication number: 20210053615Abstract: A steering device includes two motors each configured to generate a drive force that steers a steerable wheel of a vehicle and two controllers respectively corresponding to the two motors, each of the two controllers being configured to individually control a corresponding one of the motors. One of the two controllers is a first controller, and the other one of the two controllers is a second controller. The first controller is configured to calculate a command value corresponding to a total torque that should be generated in the two motors. The command value is divided into individual command values using a changeable distribution ratio set for each of the motors, the individual command values respectively corresponding to the motors. The two controllers are configured to respectively supply the motors with current corresponding to the individual command values.Type: ApplicationFiled: August 19, 2020Publication date: February 25, 2021Applicant: JTEKT CORPORATIONInventors: Yoshio KONDO, Toshiaki OGATA, Fumio KISHIDA, Keishi NAKAMURA, Hirohide SUZUKI
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Publication number: 20200361523Abstract: A steering system includes a housing, a steering operation shaft that is housed in the housing and configured to move in an axial direction to steer right and left steered wheels, a first drive source that generates a first drive force, a second drive source that generates a second drive force, a first power transfer unit that applies an axial force to the steering operation shaft with the first drive source, a second power transfer unit that applies an axial force to the steering operation shaft with the second drive force, a position detection sensor that is provided in the housing and detects an axial position of the steering operation shaft, and a control device that controls the first drive source and the second drive source using a detection result of the position detection sensor.Type: ApplicationFiled: April 29, 2020Publication date: November 19, 2020Applicant: JTEKT CORPORATIONInventors: Keishi NAKAMURA, Yoshio KONDO, Toshiaki OGATA, Fumio KISHIDA
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Publication number: 20200324807Abstract: A steering device includes: a steered shaft; a first nut; a second nut; a first motor; a second motor; a first power transmission portion that transmits a first drive force generated by the first motor to the first nut, converts the first drive force into a force in an axial direction, and biases the steered shaft in the axial direction; a second power transmission portion that transmits a second drive force generated by the second motor to the second nut, converts the second drive force into a force in the axial direction, and biases the steered shaft in the axial direction; a signal detection device that detects a first detection signal and a second detection signal with different periods; and a computation device that computes an absolute position of the steered shaft in the axial direction.Type: ApplicationFiled: April 13, 2020Publication date: October 15, 2020Applicant: JTEKT CORPORATIONInventors: Yoshio KONDO, Fumio KISHIDA, Toshiaki OGATA, Keishi NAKAMURA, Hirohide SUZUKI
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Publication number: 20200262470Abstract: A turning device includes a turning shaft having a first ball screw groove as one of a left screw and a right screw and a second ball screw groove as the other of the left screw and the right screw and turning wheels to be turned by moving in an axial direction, a first electric motor generating a first driving force, a second electric motor operating independently of the first electric motor and generating a second driving force, a first ball screw nut transmitting the first driving force generated by the first electric motor to the first ball screw groove, a second ball screw nut transmitting the second driving force generated by the second electric motor to the second ball screw groove, and a rotation regulating part regulating relative rotation of the turning shaft around an axis with respect to a housing.Type: ApplicationFiled: February 11, 2020Publication date: August 20, 2020Applicant: JTEKT CORPORATIONInventors: Yoshio KONDO, Fumio KISHIDA, Toshiaki OGATA, Keishi NAKAMURA, Hirohide SUZUKI
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Publication number: 20190168799Abstract: A steering system includes a steered shaft, a ball screw device, a motor, and a drive force transfer mechanism. The position of a housing relative to the steered shaft with a vehicle in straight travel state is defined as a steering neutral position of the steered shaft. A deflector passage is formed such that respective end portions thereof, which are connected to a rolling path, are in a semiperimeter range of the inner peripheral surface of a rolling element nut with the steered shaft at the steering neutral position. The range is formed to extend to a phase of 90° on both sides in the circumferential direction of the inner peripheral surface from a crossing line that is the farther from a drive pulley, of crossing lines formed with a virtual plane including respective rotational axes of the driven pulley and the drive pulley intersecting the rolling element nut.Type: ApplicationFiled: November 28, 2018Publication date: June 6, 2019Applicant: JTEKT CORPORATIONInventor: Toshiaki OGATA
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Patent number: 10118640Abstract: A damper apparatus includes a shock-absorbing member configured to absorb a shock while restricting movement of a shaft relative to a housing. The shock-absorbing member includes a shock-receiving member configured to come into contact with one member, which is one of a large-diameter portion of the shaft and a restriction portion of the housing, and a pre-compression spring disposed between the other member, which is the other of the large-diameter portion and the restriction portion, and the shock-receiving member in a state where the pre-compression spring is compressed in advance in an axial direction. The pre-compression spring is configured to urge the one member in the axial direction via the shock-receiving member when the large-diameter portion is relatively moved toward the restriction portion beyond a prescribed position.Type: GrantFiled: March 9, 2017Date of Patent: November 6, 2018Assignee: JTEKT CORPORATIONInventor: Toshiaki Ogata
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Patent number: 9920794Abstract: A torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body includes a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.Type: GrantFiled: July 7, 2015Date of Patent: March 20, 2018Assignees: JTEKT CORPORATION, TOGO SEISAKUSYO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshihiro Asakura, Masatoshi Fujimoto, Toshiaki Ogata, Yukihiko Kanayama, Hirotsune Suzuki, Yuji Nakamura, Yuzo Hirakawa, Kenji Hayashi, Hiroyuki Toyoda
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Publication number: 20170267282Abstract: A damper apparatus includes a shock-absorbing member configured to absorb a shock while restricting movement of a shaft relative to a housing. The shock-absorbing member includes a shock-receiving member configured to come into contact with one member, which is one of a large-diameter portion of the shaft and a restriction portion of the housing, and a pre-compression spring disposed between the other member, which is the other of the large-diameter portion and the restriction portion, and the shock-receiving member in a state where the pre-compression spring is compressed in advance in an axial direction. The pre-compression spring is configured to urge the one member in the axial direction via the shock-receiving member when the large-diameter portion is relatively moved toward the restriction portion beyond a prescribed position.Type: ApplicationFiled: March 9, 2017Publication date: September 21, 2017Applicant: JTEKT CORPORATIONInventor: Toshiaki OGATA
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Publication number: 20150308511Abstract: This torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body comprises a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.Type: ApplicationFiled: July 7, 2015Publication date: October 29, 2015Inventors: Toshihiro ASAKURA, Masatoshi FUJIMOTO, Toshiaki OGATA, Yukihiko KANAYAMA, Hirotsune SUZUKI, Yuji NAKAMURA, Yuzo HIRAKAWA, Kenji HAYASHI, Hiroyuki TOYODA
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Patent number: 9109632Abstract: This torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body comprises a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.Type: GrantFiled: February 23, 2012Date of Patent: August 18, 2015Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, TOGO SEISAKUSYO CORPORATIONInventors: Toshihiro Asakura, Masatoshi Fujimoto, Toshiaki Ogata, Yukihiko Kanayama, Hirotsune Suzuki, Yuji Nakamura, Yuzo Hirakawa, Kenji Hayashi, Hiroyuki Toyoda
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Publication number: 20130324345Abstract: This torque limiter is configured from a ring body and a spring-form part provided in the ring body. The ring body comprises a band-form metal plate and is bent approximately into a C-shape along the circumferential direction of a motor shaft and a lock holder. The spring-form part is formed so as to be capable of radial elastic deformation. The spring-form part is configured from main protrusions arranged in a compressed state between the motor shaft and the lock holder, and from sub-protrusions arranged in a non-compressed state. Further, grease is stored in a part or all of the concavities formed by the main protrusions and the sub-protrusions.Type: ApplicationFiled: February 23, 2012Publication date: December 5, 2013Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA, TOGO SEISAKUSYO CORPORATIONInventors: Toshihiro Asakura, Masatoshi Fujimoto, Toshiaki Ogata, Yukihiko Kanayama, Hirotsune Suzuki, Yuji Nakamura, Yuzo Hirakawa, Kenji Hayashi, Hiroyuki Toyoda
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Publication number: 20090044651Abstract: Meshing surfaces are formed on the tooth surfaces of the teeth of a fixed side internally toothed gear, and positions of the meshing surfaces match with a track formed by addendum edges of teeth of a flexible externally toothed gear that moves with rotation of a wave generator. In the same manner, meshing surfaces are formed on the tooth surfaces of the teeth of a movable side internally toothed gear, and the positions of the meshing surfaces match the track formed by the addendum edges of the teeth of the flexible externally toothed gear that move with the rotation of the wave generator.Type: ApplicationFiled: March 27, 2007Publication date: February 19, 2009Applicant: JTEKT CORPORATIONInventors: Motoyasu Yamamori, Toshiaki Ogata
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Patent number: 6365783Abstract: Provided is a process for producing alcohols or aldehydes by reacting monoolefins with carbon monoxide and hydrogen with less formation of by-products. The process comprises the step of reacting a monoolefin with carbon monoxide and hydrogen in the presence of a cobalt carbonyl catalyst until the conversion of monoolefin reaches 50-90% (the first reaction step), the step of separating unreacted monoolefin from the reaction mixture obtained in the first reaction step (the step of separation of unreacted monoolefin) and the step of reacting the separated unreacted monoolefin with carbon monoxide and hydrogen in the presence of a cobalt carbonyl catalyst (the second reaction step), wherein at least one of the first reaction step and the second reaction step is carried out in the presence of water.Type: GrantFiled: May 25, 2000Date of Patent: April 2, 2002Assignee: Kyowa Yuka Co., Ltd.Inventors: Yorozu Yokomori, Tsukasa Hayashi, Toshiaki Ogata, Junichi Yamada, Seiji Saito