Patents by Inventor Yutaka Taga

Yutaka Taga 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: 20200336622
    Abstract: There is provided an image forming apparatus for performing printing in a plurality of colors. The image forming apparatus includes processing circuitry. The processing circuitry is configured to receive first print data in which an object to be printed in a spot color is designated in a first area in a document to be printed and second print data of the document to be printed from an information processing apparatus; convert the second print data received by the communication unit into image data of a predetermined color; extract an image of the first area from the image data obtained by conversion of the drawing unit; convert the image of the first area extracted by the spot color image control unit into the spot color; and generate image data of the spot color in which the image of the first area converted by the conversion unit is placed.
    Type: Application
    Filed: April 9, 2020
    Publication date: October 22, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Keiji KUNIMI, Yutaka ATAKU, Noboru TAMURA, Ryo KOBAYASHI, Hiroki MATSUURA, Yoshio TAGA, Kaname NOMURA
  • Patent number: 8983696
    Abstract: A control device for a vehicle includes an electric motor disposed in a manner enabling power transmission to wheels; and a clutch device capable of interrupting and connecting a power transmission path between the wheels and the electric motor, if temperature of the electric motor exceeds predetermined temperature defined in advance, the electric motor being rotated after the power transmission path between the wheels and the electric motor is interrupted by the clutch device.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: March 17, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tooru Matsubara, Atsushi Tabata, Yutaka Taga, Yasuyuki Ueno, Hideto Minekawa
  • Publication number: 20130151057
    Abstract: A control device for a vehicle includes an electric motor disposed in a manner enabling power transmission to wheels; and a clutch device capable of interrupting and connecting a power transmission path between the wheels and the electric motor, if temperature of the electric motor exceeds predetermined temperature defined in advance, the electric motor being rotated after the power transmission path between the wheels and the electric motor is interrupted by the clutch device.
    Type: Application
    Filed: August 27, 2010
    Publication date: June 13, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Atsushi Tabata, Yutaka Taga, Yasuyuki Ueno, Hideto Minekawa
  • Patent number: 8360928
    Abstract: A drive apparatus for a vehicle includes a differential action limiting device for selectively switching a differential device in a differential state and a locked state, with the differential device and the differential action limiting device being disposed between a first electric motor and a second electric motor.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: January 29, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Terufumi Miyazaki
  • Patent number: 8135522
    Abstract: A vehicular drive system switchable between a continuously-variable and step-variable shifting states, and a control device for controlling the vehicular drive system so as to reduce a shifting shock of an automatic transmission included in the drive system, which takes place due to an overlap control involving a switching control of the drive system and a shifting control of the automatic transmission.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: March 13, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Patent number: 8036798
    Abstract: A control apparatus for a vehicular drive system arranged to electrically transmit a portion of an output force of an engine through an electric path. The control apparatus is configured to reduce loads of components associated with the electric path and to restrict a temperature rise of the components associated with the electric path, making it possible to reduce the required size of a cooling system. This is accomplished by placing a differential portion in a non-differential state or placing a switching clutch or switching brake in a partially engaged state when electrical energy through the electric path has increased to a thermal limit. As a result, the amount of generated electric energy is reduced, making it possible to restrict the temperature rise of the components associated with the electric path. Accordingly, the cooling system size can be reduced for these components.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: October 11, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Yuji Inoue, Atsushi Kamada
  • Patent number: 7988579
    Abstract: A vehicular drive system accommodated in a housing and including a first input shaft that receives a vehicle drive force generated by a vehicle drive power source, and a differential mechanism operable to distribute the vehicle drive force received from the first input shaft to a first electric motor and a second input shaft. The first and second input shafts are disposed coaxially with a first axis such that the second input shaft is disposed downstream of the first input shaft. The first input shaft is rotatably supported by a first support portion provided on the housing and an axial end portion of the second input shaft, and the second input shaft is rotatably supported by a third support portion and a fourth support portion that are provided on the housing.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: August 2, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Terufumi Miyazaki, Atsushi Kamada, Yutaka Taga
  • Patent number: 7959534
    Abstract: When a sub transmission mechanism is switched to the LO-side gear stage, a hybrid control unit executes a control operation such that vehicle speed does not exceed limit vehicle speed determined in advance in accordance with the transmission gear ratio of LO-side gear stage. Specifically, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator, so that rotation speed of the second motor generator does not exceed tolerable rotation speed. Further, the hybrid control unit reduces at least one of the driving torque generated by the engine and the second motor generator when any of temperatures respectively detected by temperature sensors exceed corresponding upper limit temperatures.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: June 14, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
    Inventors: Shinji Kasuga, Yutaka Taga, Daiki Suyama, Yoshiyuki Onozawa
  • Patent number: 7942775
    Abstract: A vehicle drive apparatus includes a first electric motor, a power distributing mechanism, a second electric motor, and a step-variable power transmission. A power transmitting portion includes a second case, accommodating the second electric motor and the automatic power transmission. One end of an input shaft of the automatic power transmission faces a drive apparatus output shaft, which is supported with a first support wall mounted on the second case, the second electric motor being accommodated in a compartment opposite to the automatic power transmission with respect to the first support wall, and one end of a second rotor supporting shaft of the second electric motor faces the automatic power transmission, which is supported with a second support wall mounted on the second case. The automatic power transmission and second electric motor can be unitized as one power transmitting portion, improving assembling workability of the drive apparatus.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: May 17, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Terufumi Miyazaki
  • Patent number: 7941259
    Abstract: Vehicular drive system which is small-sized and/or improved in its fuel economy. A power distributing mechanism 16, which is provided with a differential-state switching device in the form of a switching clutch C0 and a switching brake B0, is switchable by the switching device between a differential state (continuously-variable shifting state) in which the mechanism is operable as an electrically controlled continuously variable transmission, and a fixed-speed-ratio shifting state in which the mechanism is operable as a transmission having a fixed speed ratio or ratios. The power distributing mechanism 16 is placed in the fixed-speed-ratio shifting state during a high-speed running of the vehicle or a high-speed operation of engine 8, so that the output of the engine 8 is transmitted to drive wheels 38 primarily through a mechanical power transmitting path, whereby fuel economy of the vehicle is improved owing to reduction of a loss of conversion of a mechanical energy into an electric energy.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: May 10, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Patent number: 7935021
    Abstract: A vehicle-starting-engine-torque restricting device is provided to restrict engine torque upon starting of a vehicle with an engine used as a vehicle drive power source, so that a required output of a first electric motor which generates a reaction force corresponding to the engine torque can be made smaller than when the engine torque is not restricted. Namely, the vehicle-starting-engine-torque restricting device eliminates a need of increasing the maximum output of the first electric motor to generate the reaction force corresponding to the engine torque, making it possible to reduce the required size of the first electric motor.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: May 3, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Atsushi Kamada
  • Patent number: 7935015
    Abstract: In a vehicle driving apparatus including a differential mechanism capable of executing a differential action, a control device can make the driving apparatus small-size, improve fuel consumption, and increase output torque. A transmission mechanism can be switched to a continuously variable shifting state and a step variable shifting state, by a switching clutch or a switching brake. Also, with a switch control bringing the switching clutch into a half-engaged state, during an engine startup/running, while the differential portion is allowed to operate as the electrically controlled continuously variable transmission, a reaction force against an engine torque is generated by the half-engaged switching clutch. Thus, the engine torque not less than the torque bearable by a first electric motor can be inputted into the differential portion, thereby increasing the output torque.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: May 3, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Yuji Inoue, Atsushi Kamada
  • Patent number: 7848858
    Abstract: Vehicular drive system which is small-sized and/or improved in its fuel economy. A power distributing mechanism 16, which is provided with a differential-state switching device in the form of a switching clutch C0 and a switching brake B0, is switchable by the switching device between a differential state (continuously-variable shifting state) in which the mechanism is operable as an electrically controlled continuously variable transmission, and a fixed-speed-ratio shifting state in which the mechanism is operable as a transmission having a fixed speed ratio or ratios. The power distributing mechanism 16 is placed in the fixed-speed-ratio shifting state during a high-speed running of the vehicle or a high-speed operation of engine 8, so that the output of the engine 8 is transmitted to drive wheels 38 primarily through a mechanical power transmitting path, whereby fuel economy of the vehicle is improved owing to reduction of a loss of conversion of a mechanical energy into an electric energy.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: December 7, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Patent number: 7822524
    Abstract: Vehicular drive system which is small-sized and/or improved in its fuel economy. A power distributing mechanism 16, which is provided with a differential-state switching device in the form of a switching clutch C0 and a switching brake B0, is switchable by the switching device between a differential state (continuously-variable shifting state) in which the mechanism is operable as an electrically controlled continuously variable transmission, and a fixed-speed-ratio shifting state in which the mechanism is operable as a transmission having a fixed speed ratio or ratios. The power distributing mechanism 16 is placed in the fixed-speed-ratio shifting state during a high-speed running of the vehicle or a high-speed operation of engine 8, so that the output of the engine 8 is transmitted to drive wheels 38 primarily through a mechanical power transmitting path, whereby fuel economy of the vehicle is improved owing to reduction of a loss of conversion of a mechanical energy into an electric energy.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: October 26, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Patent number: 7811190
    Abstract: A vehicular drive system including a first electric motor, a power distributing mechanism, and a second electric motor disposed on a first axis, and an automatic transmission portion disposed on a second axis parallel to the first axis, and a power transmitting member at an end of the first axis remote from an input rotary member and a rotary member at an end of the second axis remote from the input rotary member are connected to each other through a drive linkage, thereby a total axial dimension of the first electric motor, power distributing mechanism, and second electric motor and an axial dimension of the automatic transmission portion are substantially equal to each other, whereby the axial dimension of the drive system is reduced. A housing of the vehicular drive system includes mutually separate first, second, third, and fourth casing portions, so the drive system can be easily assembled.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: October 12, 2010
    Assignee: Toyota Jidsoha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Terufumi Miyazaki, Atsushi Kamada, Yutaka Taga
  • Publication number: 20100222171
    Abstract: A vehicular drive system accommodated in a housing and including a first input shaft that receives a vehicle drive force generated by a vehicle drive power source, and a differential mechanism operable to distribute the vehicle drive force received from the first input shaft to a first electric motor and a second input shaft. The first and second input shafts are disposed coaxially with a first axis such that the second input shaft is disposed downstream of the first input shaft. The first input shaft is rotatably supported by a first support portion provided on the housing and an axial end portion of the second input shaft, and the second input shaft is rotatably supported by a third support portion and a fourth support portion that are provided on the housing.
    Type: Application
    Filed: June 22, 2006
    Publication date: September 2, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Terufumi Miyazaki, Atsushi Kamada, Yutaka Taga
  • Patent number: 7766778
    Abstract: A vehicular drive system which includes a first electric motor, a power distributing mechanism (first gear device), a second electric motor, and a step-variable automatic transmission (second gear device), and in which the first electric motor and the power distributing mechanism constitute a first unit, while the second electric motor and the automatic transmission constitute a second unit, and wherein the power distributing mechanism has an output shaft, and the automatic transmission has an input shaft which is connected to the output shaft, whereby a drive force can be transmitted between the first unit and the second unit. The individually prepared first unit and the second unit are assembled together into the vehicular drive system such that the output shaft of the power distributing mechanism and the input shaft of the automatic transmission are connected to each other. Accordingly, the drive system has an improved efficiency of assembling.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: August 3, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Terufumi Miyazaki, Ryuji Ibaraki
  • Patent number: 7753149
    Abstract: A rotor shaft of a first electric motor is connected to a crankshaft of the engine by being fit to a transmitting member that is coupled to the crankshaft. The stator and rotor shaft of the first electric motor are supported by a case housing the first electric motor.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: July 13, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Terufumi Miyazaki, Ryuji Ibaraki
  • Patent number: 7722497
    Abstract: An engaging device (a switching clutch C0 or a switching brake B0) switches a shifting mechanism 10 between a continuously variable shifting state and a step-variable shifting state. In particular. The step-variable shifting state is set in a high speed running, because a first electric motor M1 need not bear a reaction torque against an input torque TINS inputted into a differential portion 11, the first electric motor M1 is prevented from being large-sized and suppressed in durability lowering. Even when switching to the step-variable shifting state is unable, the input torque TINS against which the first electric motor M1 should bear the reaction torque, is limited by an input torque control means 86, and the first electric motor M1 is prevented from being large-sized and suppressed in durability lowering.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: May 25, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Publication number: 20090318261
    Abstract: In a vehicle driving apparatus including a differential mechanism capable of executing a differential action, a control device can make the driving apparatus small-size, improve fuel consumption, and increase output torque. A transmission mechanism can be switched to a continuously variable shifting state and a step variable shifting state, by a switching clutch or a switching brake. Also, with a switch control bringing the switching clutch into a half-engaged state, during an engine startup/running, while the differential portion is allowed to operate as the electrically controlled continuously variable transmission, a reaction force against an engine torque is generated by the half-engaged switching clutch. Thus, the engine torque not less than the torque bearable by a first electric motor can be inputted into the differential portion, thereby increasing the output torque.
    Type: Application
    Filed: May 30, 2006
    Publication date: December 24, 2009
    Inventors: Atsushi Tabata, Yutaka Taga, Yuji Inoue, Atsushi Kamada