Patents by Inventor Ryouichi Kubo
Ryouichi Kubo 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).
-
Publication number: 20210324921Abstract: A clutch device includes a plurality of clutches; a plurality of cylinder chambers provided to respectively correspond to the clutches; a pump configured to discharge a hydraulic fluid; a plurality of control valves each of which is configured to control the hydraulic fluid supplied from the pump to a corresponding one of the cylinder chambers; and an oil passage that distributes the hydraulic fluid discharged from the pump, to the control valves. The oil passage includes at least one split point at which the hydraulic fluid discharged from the pump splits. At least one check valve is provided between the at least one split point and at least one control valve among the control valves, the at least one check valve being configured to block a flow of the hydraulic fluid in a direction from the at least one control valve toward the at least one split point.Type: ApplicationFiled: April 13, 2021Publication date: October 21, 2021Applicant: JTEKT CORPORATIONInventors: Ryouichi KUBO, Takahiro KUBO, Shun ONO
-
Publication number: 20190376565Abstract: A driving force distribution apparatus distributes and outputs, to a first clutch hub and a second clutch hub, a driving force input from a driving source. The driving force distribution apparatus includes a clutch housing to which a driving force is input, a first multi-disc clutch disposed between the clutch housing and the first clutch hub, and a second multi-disc clutch disposed between the clutch housing and the second clutch hub. A first pressing mechanism that presses the first multi-disc clutch includes an annular pressing portion disposed between a bottom wall portion of the clutch housing and the first multi-disc clutch, legs inserted in insertion holes formed in the bottom wall portion, and a lubricating oil introduction portion that guides lubricating oil supplied from the clearance between the first clutch hub and the bottom wall portion toward the first multi-disc clutch.Type: ApplicationFiled: June 7, 2019Publication date: December 12, 2019Applicant: JTEKT CorporationInventors: Mikiharu OYABU, Yoshinori Suzuki, Yuji Tsuzuki, Hiroyuki Inoue, Naoki Ootawara, Yuji Niwa, Takahiro Kubo, Kazuteru Shinagawa, Ryouichi Kubo
-
Publication number: 20190309806Abstract: A driving force distribution apparatus includes a hollow shaft configured to rotate together with a ring gear, a first output shaft having a shaft portion inserted through the hollow shaft, a second output shaft arranged coaxially with the first output shaft, and a driving force transmission mechanism configured such that a driving force transmitted to the hollow shaft is transmitted to the first and second output shafts. A case member has a lubricating oil introduction chamber into which lubricating oil stirred up by the ring gear is introduced. The lubricating oil is supplied from the lubricating oil introduction chamber to the driving force transmission mechanism via a space between the hollow shaft and the shaft portion of the first output shaft. The lubricating oil introduction chamber is formed between the hollow shaft and a bearing mechanism that supports one end of the first output shaft.Type: ApplicationFiled: April 4, 2019Publication date: October 10, 2019Applicant: JTEKT CORPORATIONInventors: Mikiharu Oyabu, Yoshinori Suzuki, Yuji Tsuzuki, Ryouichi Kubo, Naoki Ootawara, Kazuteru Shinagawa, Takahiro Kubo, Yuji Niwa
-
Publication number: 20190301582Abstract: A drive force distribution apparatus includes a hollow shaft that rotates as a unit with a ring gear, a tubular clutch housing that is not allowed to rotate relative to the hollow shaft, a first multi-plate clutch located between the clutch housing and a first clutch hub, a second multi-plate clutch located between the clutch housing and a second clutch hub, and a stopper ring that keeps the clutch housing from coming off the hollow shaft. The stopper ring threadedly engages with a screw hole that is formed in the hollow shaft. An outer engagement portion of the hollow shaft engages with an inner engagement portion of the clutch housing. At least part of the outer engagement portion is located in the outer circumference of the screw hole.Type: ApplicationFiled: March 28, 2019Publication date: October 3, 2019Applicant: JTEKT CORPORATIONInventors: Yuji Tsuzuki, Mikiharu Oyabu, Ryouichi Kubo, Naoki Ootawara, Hiroyuki Inoue, Shun Ohno
-
Patent number: 9931930Abstract: A driving force transmission apparatus includes: a pinion gear shaft having a pinion teeth portion, a first shaft portion extending from one side of the pinion teeth portion, and a second shaft portion extending from the other side of the pinion teeth portion; a ring gear meshing with the pinion teeth portion; a clutch housing capable of rotating relative to the pinion gear shaft on a rotation axis in coincidence with a rotation axis of the pinion gear shaft; a clutch mechanism located between the clutch housing and the first shaft portion of the pinion gear shaft; and a differential carrier accommodating the ring gear. The first shaft portion and the second shaft portion of the pinion gear shaft are supported by a first bearing and a second bearing, respectively. The clutch housing is supported by the pinion gear shaft through a third bearing fitted on the first shaft portion.Type: GrantFiled: April 10, 2017Date of Patent: April 3, 2018Assignee: JTEKT CORPORATIONInventors: Isao Ito, Hiroshi Takuno, Noriyuki Fujii, Ryouichi Kubo
-
Publication number: 20170297429Abstract: A driving force transmission apparatus includes: a pinion gear shaft having a pinion teeth portion, a first shaft portion extending from one side of the pinion teeth portion, and a second shaft portion extending from the other side of the pinion teeth portion; a ring gear meshing with the pinion teeth portion; a clutch housing capable of rotating relative to the pinion gear shaft on a rotation axis in coincidence with a rotation axis of the pinion gear shaft; a clutch mechanism located between the clutch housing and the first shaft portion of the pinion gear shaft; and a differential carrier accommodating the ring gear. The first shaft portion and the second shaft portion of the pinion gear shaft are supported by a first bearing and a second bearing, respectively. The clutch housing is supported by the pinion gear shaft through a third bearing fitted on the first shaft portion.Type: ApplicationFiled: April 10, 2017Publication date: October 19, 2017Applicant: JTEKT CORPORATIONInventors: Isao ITO, Hiroshi TAKUNO, Noriyuki FUJII, Ryouichi KUBO
-
Patent number: 9694710Abstract: A vehicle control device controls torque of a drive motor such that rotation of the drive motor is transferred to rear drive wheels of a vehicle via a drive unit that includes a speed reducer including a plurality of gears rotatably supported by bearings. The vehicle control device sets different values as torque restriction values for torque to be generated by the drive motor when the vehicle is driven forward and when the vehicle is driven rearward.Type: GrantFiled: April 6, 2015Date of Patent: July 4, 2017Assignee: JTEKT CORPORATIONInventors: Ryohei Shigeta, Yoshinao Iwase, Keita Nomura, Ryouichi Kubo
-
Patent number: 9638312Abstract: A drive unit includes a speed reducer that includes a plurality of gears having helical teeth and rotatably supported by bearings, and transfers rotation of a drive motor to rear drive wheels of a vehicle. The maximum value of torque to be generated by the drive motor during rearward travel of the vehicle is set to be lower than that during forward travel. Under such a precondition, the size of a bearing that receives a load during rearward travel, among the bearings which constitute the speed reducer, is smaller than the size of a bearing that receives a load during forward travel.Type: GrantFiled: April 6, 2015Date of Patent: May 2, 2017Assignee: JTEKT CORPORATIONInventors: Ryohei Shigeta, Yoshinao Iwase, Keita Nomura, Ryouichi Kubo
-
Patent number: 9211907Abstract: A solenoid valve device includes: a solenoid valve that includes a solenoid that is supplied with driving current to generate magnetic flux, and a valve element that is moved by the magnetic flux generated from the solenoid; and a control device that controls the solenoid valve. The control device includes an alternating current component in the driving current and supplies the driving current including the alternating current component to the solenoid, and detects an impedance of the solenoid.Type: GrantFiled: March 23, 2012Date of Patent: December 15, 2015Assignee: JTEKT CORPORATIONInventors: Ryouichi Kubo, Masahiko Sakamaki
-
Publication number: 20150291058Abstract: A vehicle control device controls torque of a drive motor such that rotation of the drive motor is transferred to rear drive wheels of a vehicle via a drive unit that includes a speed reducer including a plurality of gears rotatably supported by bearings. The vehicle control device sets different values as torque restriction values for torque to be generated by the drive motor when the vehicle is driven forward and when the vehicle is driven rearward.Type: ApplicationFiled: April 6, 2015Publication date: October 15, 2015Applicant: JTEKT CORPORATIONInventors: Ryohei SHIGETA, Yoshinao IWASE, Keita NOMURA, Ryouichi KUBO
-
Publication number: 20150291151Abstract: A drive unit includes a speed reducer that includes a plurality of gears having helical teeth and rotatably supported by bearings, and transfers rotation of a drive motor to rear drive wheels of a vehicle. The maximum value of torque to be generated by the drive motor during rearward travel of the vehicle is set to be lower than that during forward travel. Under such a precondition, the size of a bearing that receives a load during rearward travel, among the bearings which constitute the speed reducer, is smaller than the size of a bearing that receives a load during forward travel.Type: ApplicationFiled: April 6, 2015Publication date: October 15, 2015Applicant: JTEKT CORPORATIONInventors: Ryohei SHIGETA, Yoshinao IWASE, Keita NOMURA, Ryouichi KUBO
-
Patent number: 9038763Abstract: A hydraulic power steering system includes: a hydraulic cylinder in which an interior is partitioned into first and second hydraulic chambers by a piston on a steered shaft; a variable displacement electric pump that supplies hydraulic fluid to the hydraulic cylinder; a selector valve selectively set in a mode in which the hydraulic fluid is supplied to the first hydraulic chamber and drained from the second hydraulic chamber or in a mode in which the hydraulic fluid is supplied to the second hydraulic chamber and drained from the first hydraulic chamber; a detector that detects torque, steering angle, and/or vehicle speed; and a controller.Type: GrantFiled: October 14, 2011Date of Patent: May 26, 2015Assignee: JTEKT CORPORATIONInventors: Ryouichi Kubo, Yasuhiro Tomagou, Akihiko Shiina, Masahiko Sakamaki, Tetsuya Ozaki
-
Patent number: 8584791Abstract: A hydraulic power steering apparatus assists in steering of a vehicle with a hydraulic cylinder. The hydraulic power steering apparatus includes a flow control valve, a steering torque sensor, a steering angle sensor, a vehicle speed sensor, and an ECU. The flow control valve changes the supply/drainage amount of hydraulic fluid for the hydraulic cylinder. The ECU sets a supply/drainage mode for supplying/draining the hydraulic fluid with respect to the hydraulic cylinder based on detection results from the aforementioned sensors and controls the flow control valve in accordance with the supply/drainage mode of the hydraulic fluid.Type: GrantFiled: October 14, 2011Date of Patent: November 19, 2013Assignee: JTEKT CorporationInventors: Masahiko Sakamaki, Yasuhiro Tomagou, Akihiko Shiina, Tetsuya Ozaki, Ryouichi Kubo
-
Publication number: 20120247864Abstract: A solenoid valve device includes: a solenoid valve that includes a solenoid that is supplied with driving current to generate magnetic flux, and a valve element that is moved by the magnetic flux generated from the solenoid; and a control device that controls the solenoid valve. The control device includes an alternating current component in the driving current and supplies the driving current including the alternating current component to the solenoid, and detects an impedance of the solenoid.Type: ApplicationFiled: March 23, 2012Publication date: October 4, 2012Applicant: JTEKT CORPORATIONInventors: Ryouichi KUBO, Masahiko SAKAMAKI
-
Publication number: 20120097472Abstract: A hydraulic power steering system includes: a hydraulic cylinder in which an interior is partitioned into first and second hydraulic chambers by a piston on a steered shaft; a variable displacement electric pump that supplies hydraulic fluid to the hydraulic cylinder; a selector valve selectively set in a mode in which the hydraulic fluid is supplied to the first hydraulic chamber and drained from the second hydraulic chamber or in a mode in which the hydraulic fluid is supplied to the second hydraulic chamber and drained from the first hydraulic chamber; a detector that detects torque, steering angle, and/or vehicle speed; and a controller.Type: ApplicationFiled: October 14, 2011Publication date: April 26, 2012Applicant: JTEKT CORPORATIONInventors: Ryouichi KUBO, Yasuhiro TOMAGOU, Akihiko SHIINA, Masahiko SAKAMAKI, Tetsuya OZAKI
-
Publication number: 20120097471Abstract: A hydraulic power steering apparatus assists in steering of a vehicle with a hydraulic cylinder. The hydraulic power steering apparatus includes a flow control valve, a steering torque sensor, a steering angle sensor, a vehicle speed sensor, and an ECU. The flow control valve changes the supply/drainage amount of hydraulic fluid for the hydraulic cylinder. The ECU sets a supply/drainage mode for supplying/draining the hydraulic fluid with respect to the hydraulic cylinder based on detection results from the aforementioned sensors and controls the flow control valve in accordance with the supply/drainage mode of the hydraulic fluid.Type: ApplicationFiled: October 14, 2011Publication date: April 26, 2012Applicant: JTEKT CORPORATIONInventors: Masahiko SAKAMAKI, Yasuhiro TOMAGOU, Akihiko SHIINA, Tetsuya OZAKI, Ryouichi KUBO
-
Publication number: 20100045227Abstract: In a resolver and an electric power steering apparatus that uses the resolver, one ends of resolver coils that are provided at regular intervals with respect to the rotation center of a resolver rotor are electrically connected at one connection point, and the voltage at the connection point is maintained at a predetermined reference voltage. If at least one of the condition that the square sum Fs does not satisfy the condition F1<Fs<F2 (the square sum Fs is not within a predetermined first range) and the condition that the sum Fa does not satisfy the condition |Fa|<F3 (the sum Fa is not within a predetermined second range) is satisfied, the ECU determines that an abnormality has occurred in the resolver.Type: ApplicationFiled: August 24, 2009Publication date: February 25, 2010Applicant: JTEKT CORPORATIONInventors: Noritake Ura, Ryouichi Kubo
-
Patent number: 6558505Abstract: Apparatus and methods for producing semiconductor devices are disclosed. A processing chamber includes an interior component having a stepped region including a plurality of raised sections and recessed sections divided by steps. With this apparatus, it is possible to prevent a film of deposited material formed on the stepped region from peeling, thereby decreasing the number of particles in the chamber and increasing the operation rate.Type: GrantFiled: May 13, 2002Date of Patent: May 6, 2003Assignee: Kawasaki Microelectronics, Inc.Inventors: Katsunori Suzuki, Hidetaka Horiuchi, Yasushi Kikuchi, Jin Yokogawa, Ryouichi Kubo, Koji Wakabayashi
-
Patent number: 6547921Abstract: Apparatus and methods for producing semiconductor devices are disclosed. A processing chamber includes an interior component having a stepped region including a plurality of raised sections and recessed sections divided by steps. With this apparatus, it is possible to prevent a film of deposited material formed on the stepped region from peeling thereby decreasing the number of particles in the chamber and increasing the operation rate.Type: GrantFiled: May 13, 2002Date of Patent: April 15, 2003Assignee: Kawasaki Microelectronics, Inc.Inventors: Katsunori Suzuki, Hidetaka Horiuchi, Yasushi Kikuchi, Jin Yokogawa, Ryouichi Kubo, Koji Wakabayashi
-
Publication number: 20030029565Abstract: Apparatus and methods for producing semiconductor devices are disclosed. A processing chamber includes an interior component having a stepped region including a plurality of raised sections and recessed sections divided by steps. With this apparatus, it is possible to prevent a film of deposited material formed on the stepped region from peeling, thereby decreasing the number of particles in the chamber and increasing the operation rate.Type: ApplicationFiled: May 13, 2002Publication date: February 13, 2003Applicant: Kawasaki Microelectronics, Inc.Inventors: Katsunori Suzuki, Hidetada Horiuchi, Yasushi Kikuchi, Jin Yokogawa, Ryouichi Kubo, Koji Wakabayashi