Patents by Inventor Tatsuyuki Yamamoto

Tatsuyuki 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).

  • Publication number: 20150043944
    Abstract: A supplying apparatus includes a mounting portion for mounting a developer supply container. The container includes a discharge opening; a receiving portion for receiving the developer, the receiving portion including a receiving opening and connectable with the discharge opening to receive the developer when the supply container is mounting to the mounting portion; a first moving mechanism for moving the receiving portion to and away from a position of the discharge opening in interrelation with mounting and demounting operation of the supply container; a covering member provided in a position opposing and above the receiving opening and movable between a covering position covering the receiving opening and an open position opening the receiving opening; and a second moving mechanism for moving the covering member from the covering position to the open position with the mounting operation of the supply container.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 12, 2015
    Inventor: Tatsuyuki Yamamoto
  • Publication number: 20150037071
    Abstract: An image forming apparatus includes: a single driving source for driving each of first and second supply containers; and a drive switching device. The drive switching device includes: a rotatable driving member; a rotatable swinging member rotatable by rotation of the rotatable driving member and swingable between a first connected position with the first supply container and a first retracted position from the first supply container; and a rotatable moving member movable between a second connected position with the second container to permit drive transmission from said rotatable swinging member swung to the first retracted position to the second supply container and a second retracted position from the second supply container.
    Type: Application
    Filed: July 23, 2014
    Publication date: February 5, 2015
    Inventor: Tatsuyuki Yamamoto
  • Publication number: 20150039174
    Abstract: Unique vehicle-identifying information, such as a VIN, for distinguishing or identifying a vehicle is stored in advance in a vehicle-identifying-information storing section. A vehicle-running-state information storing section collects and stores various pieces of vehicle-running-state information relevant to an operating state of airbag system and the like during a running of the vehicle. When a vehicle-abnormal-state detecting section detects an abnormality, a prioritizing section imparts a priority sequence in order of the vehicle-identifying information, information relevant to the operating state of airbag system, and the other vehicle-running-state information. Then, the prioritized information is promptly sent to a side of base station.
    Type: Application
    Filed: March 7, 2013
    Publication date: February 5, 2015
    Inventors: Kazuya Takahashi, Tatsuyuki Yamamoto
  • Publication number: 20140376968
    Abstract: An image forming apparatus includes: a bottle which is detachably mounted on an apparatus body to store toner; a shutter which is disposed on the bottle to open and close a discharge port which discharges the toner; and a shutter slider which is disposed in the apparatus body to open and close the shutter by engaging therewith along with an insertion operation of the bottle. The shutter slider is disposed to be movable from a first position, which allows the shutter to be located at a closed position at which the discharge port is closed by the shutter when the bottle is mounted on the apparatus body, to a second position, in which the discharge port is to be opened and closed by the shutter along with an operation of attaching and detaching the bottle to and from the apparatus body.
    Type: Application
    Filed: June 12, 2014
    Publication date: December 25, 2014
    Inventors: Tatsuyuki Yamamoto, Takao Nakajima
  • Patent number: 8611788
    Abstract: An image forming apparatus includes an image bearing member; a developing device provided movably in a direction in which the developing device is to be moved away from the image bearing member; a supplying device, provided with a supply port through which a developer is to be supplied, for supplying the developer; a shutter member provided so that the supply port can be covered and uncovered; a first interrelating mechanism for moving the shutter member from an opposing position in which the shutter member opposes the supply port to a retracted position in interrelation with a mounting operation of the developing device; and a second interrelating mechanism for moving the shutter member from the retracted position to the opposing position in interrelation with a demounting operation of the developing device.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 17, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuyuki Yamamoto
  • Patent number: 8478164
    Abstract: A developing device includes a first developer carrying member for forming a toner image on an image bearing member; a second developer carrying member for forming the toner image on the image bearing member; a supporting member for rotatably supporting the first developer carrying member; a swingable member for swinging the second developer carrying member about the first developer carrying member; an urging portion for urging the second developer carrying member toward the image bearing member; and a buffering portion, provided so as to press-contact the swingable member, for damping vibration of the swingable member.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: July 2, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuyuki Yamamoto
  • Patent number: 8428491
    Abstract: An image forming apparatus includes an image bearing member; a developing device for forming a toner image on the image bearing member while carrying a developer on a developer carrying member, wherein the developing device is mountable and demountable relative to a main assembly of the apparatus in a direction substantially parallel with a radial direction of the image bearing member; an urging mechanism for urging the developing device toward the surface of the image bearing member; and a moving mechanism, movable in a movement path of the developing device, for moving the developing device between a developing position in which development can be effected and a retracted position retracted from the developing position in a state in which the developing device is urged by the urging mechanism.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: April 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuyuki Yamamoto
  • Patent number: 8174221
    Abstract: To provide a motor control apparatus that uses an inverter to drive an AC motor and hybrid automotive control apparatus adapted to drive an AC motor by use of an inverter while reducing torque pulsations during switching from PWM driving to rectangular-wave driving. The motor control apparatus 100 has a PWM driving mode in which to input a PWM signal to the inverter 8 and perform PWM driving of the AC motor 4, and a rectangular-wave driving mode in which to input a rectangular-wave signal to the inverter 8 and perform rectangular-wave driving of the AC motor 4. For switching from the PWM driving mode to the rectangular-wave driving mode, a driving-pulse switching block 140 performs the switching process within a maximum pulse-width range of high-level or low-level pulses developed in the PWM driving mode.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: May 8, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Kaneko, Tatsuyuki Yamamoto, Tokihito Suwa, Yuuichirou Takamune, Kenta Katsuhama, Kimihisa Furukawa
  • Patent number: 8073600
    Abstract: A controller of a field winding type synchronous motor is provided that can stably output torque even if the d-axis current pulsates by reducing torque pulsation without causing fluctuation in the magnetic flux acting on the torque. A motor control unit 100 performs control so that a desired torque can be generated from a field winding type motor 20 having a field winding 22f on the rotor. Based on a current Id flowing in the d-axis direction out of the current flowing in a stator winding 22a of the field winding type motor 20, the motor control unit 100 calculates an induced voltage Vf2 being induced in the field winding 22f and compensates a field voltage Vf of the field winding based on the induced voltage Vf2, thus suppressing pulsation of the field current flowing in the field winding of the field winding type motor 20.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: December 6, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Kaneko, Kenta Katsuhama, Shigeru Akaishi, Kazuya Motegi, Tatsuyuki Yamamoto
  • Patent number: 8056660
    Abstract: A vehicle can ensure an engine torque the driver desires even though the load torque of a generator with respect to the engine varies, and in particular can restrain occurrence of such a risk that an engine stall occurs when a load to the engine is large upon, for example, engagement of a clutch. A controller predicts a load torque of the generator with respect to the engine in future several hundred milliseconds at maximum from the present time, in view of a magnetic field voltage and a speed of the generator at the present time, and controls the engine in accordance with the predicted load torque in order to prevent the output torque of the engine from being insufficient.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: November 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Shinya Imura, Norikazu Matsuzaki, Masaru Ito, Shin Fujiwara, Tatsuyuki Yamamoto
  • Publication number: 20110211868
    Abstract: An image forming apparatus includes an image bearing member; a developing device provided movably in a direction in which the developing device is to be moved away from the image bearing member; a supplying device, provided with a supply port through which a developer is to be supplied, for supplying the developer; a shutter member provided so that the supply port can be covered and uncovered; a first interrelating mechanism for moving the shutter member from an opposing position in which the shutter member opposes the supply port to a retracted position in interrelation with a mounting operation of the developing device; and a second interrelating mechanism for moving the shutter member from the retracted position to the opposing position in interrelation with a demounting operation of the developing device.
    Type: Application
    Filed: February 22, 2011
    Publication date: September 1, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tatsuyuki Yamamoto
  • Publication number: 20110206419
    Abstract: A developing device includes a first developer carrying member for forming a toner image on an image bearing member; a second developer carrying member for forming the toner image on the image bearing member; a supporting member for rotatably supporting the first developer carrying member; a swingable member for swinging the second developer carrying member about the first developer carrying member; an urging portion for urging the second developer carrying member toward the image bearing member; and a buffering portion, provided so as to press-contact the swingable member, for damping vibration of the swingable member.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 25, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tatsuyuki Yamamoto
  • Publication number: 20110170907
    Abstract: An image forming apparatus includes an image bearing member; a developing device for forming a toner image on the image bearing member while carrying a developer on a developer carrying member, wherein the developing device is mountable and demountable relative to a main assembly of the apparatus in a direction substantially parallel with a radial direction of the image bearing member; an urging mechanism for urging the developing device toward the surface of the image bearing member; and a moving mechanism, movable in a movement path of the developing device, for moving the developing device between a developing position in which development can be effected and a retracted position retracted from the developing position in a state in which the developing device is urged by the urging mechanism.
    Type: Application
    Filed: January 12, 2011
    Publication date: July 14, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Tatsuyuki Yamamoto
  • Patent number: 7853166
    Abstract: An image-forming apparatus includes a first unit configured to form an image on a recording medium, a second unit configured to open/close relative to the first unit, and an instructing unit configured to perform an instruction for causing the image-forming apparatus to execute a predetermined operation, wherein the image-forming apparatus is disabled from executing the predetermined operation regardless of whether instruction is performed by the instructing unit when the second unit is in an opened state, and wherein the first unit forms an image on a recording medium regardless of whether the second unit is in an opened state.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: December 14, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masakatsu Yamada, Tatsuyuki Yamamoto, Takafumi Katayama, Daigo Nakagawa, Hirohisa Sawada, Fumihiko Nakamura, Kazuyoshi Sasae
  • Patent number: 7693444
    Abstract: An image reading and recording apparatus has a scanner unit for effecting exposure conforming to an image signal on a photosensitive drum, a heat roller pair for fixing a toner image formed on a recording sheet, and a reading unit for reading an original. The heat roller pair is disposed above a process cartridge, and a cartridge dismounting space for permitting dismounting of the process cartridge therethrough is disposed between the heat roller pair and the scanner unit.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: April 6, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takafumi Katayama, Fumihiko Nakamura, Tatsuyuki Yamamoto
  • Patent number: 7651426
    Abstract: A first common rotational axis of first and second shafts of a first differential is prevented from being coaxial with a second common rotational axis of first and second rotary members of a second differential so that each of the first and second shafts is prevented from extending through at least one of the first and second rotary members.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: January 26, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Yokoyama, Makoto Yamakado, Tatsuyuki Yamamoto
  • Publication number: 20090128069
    Abstract: To provide a motor control apparatus that uses an inverter to drive an AC motor and hybrid automotive control apparatus adapted to drive an AC motor by use of an inverter while reducing torque pulsations during switching from PWM driving to rectangular-wave driving. The motor control apparatus 100 has a PWM driving mode in which to input a PWM signal to the inverter 8 and perform PWM driving of the AC motor 4, and a rectangular-wave driving mode in which to input a rectangular-wave signal to the inverter 8 and perform rectangular-wave driving of the AC motor 4. For switching from the PWM driving mode to the rectangular-wave driving mode, a driving-pulse switching block 140 performs the switching process within a maximum pulse-width range of high-level or low-level pulses developed in the PWM driving mode.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 21, 2009
    Applicant: HITACHI, LTD.
    Inventors: Satoru KANEKO, Tatsuyuki YAMAMOTO, Tokihito SUWA, Yuuichirou TAKAMUNE, Kenta KATSUHAMA, Kimihisa FURUKAWA
  • Patent number: 7528999
    Abstract: The preset invention relates to an image forming apparatus comprising; an original loading member on which an original is loaded, image reading means for scanning the loaded original to read image information, recording material conveying unit which conveys a recording material in a direction substantially orthogonal to a direction in which the image reading means reads the image information, image forming means for forming an image on the conveyed recording material and an image forming electric board which is arranged in a space on a side of a lengthwise direction of said original relative to said recording material conveying unit.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: May 5, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirohisa Sawada, Kazuhiko Hasegawa, Yoshiyuki Nakayama, Tatsuyuki Yamamoto
  • Publication number: 20090071735
    Abstract: An object of the present invention is to provide a controller of a field winding type synchronous motor that can stably output torque even if the d-axis current pulsates by reducing torque pulsation without causing fluctuations in the magnetic flux acting on the torque, and also provide an electric drive system, an electric four wheel driving vehicle, and a hybrid automobile. A motor control unit 100 performs control so that a desired torque be generated from a field winding type motor 20 having a field winding 22f on the rotor. Based on a current Id flowing in the d-axis direction out of the currents flowing in a stator winding 22a of the field winding type motor 20, the motor control unit 100 calculates an induced voltage Vf2 being induced in the field winding 22f and compensates a field voltage Vf of the field winding based on the induced voltage Vf2, thus suppressing pulsation of the field current flowing in the field winding of the field winding type motor 20.
    Type: Application
    Filed: July 11, 2005
    Publication date: March 19, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Satoru Kaneko, Kenta Katsuhama, Shigeru Akaishi, Kazuya Motegi, Tatsuyuki Yamamoto
  • Patent number: 7495411
    Abstract: An object of the present invention is to provide a controller for an electric four-wheel-drive vehicle, which is capable of minimizing torque changes and consuming excessive power even when the excessive power is generated by a generator. A motor control unit causes an AC motor to generate desired torque by controlling an inverter. When the power generated by the generator exceeds the power consumed by the inverter and AC motor to generate excessive power, a current command determination unit in the motor control unit consumes the excessive power by increasing a loss in the AC motor.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: February 24, 2009
    Assignees: Hitachi, Ltd., Nissan Motor Co., Ltd.
    Inventors: Satoru Kaneko, Shiho Izumi, Tatsuyuki Yamamoto, Kenta Katsuhama, Shigeru Akaishi, Yasuo Matsunaga, Hidehiko Sugita