Patents by Inventor Tatsuya Kawamura

Tatsuya Kawamura 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: 20240169097
    Abstract: A data authenticity proving system calculates a hash value A and a hash value B from an evidence data transmitted from a terminal device at respectively different timings, and, when the hash value A and the hash value B are the same, registers the evidence data by storing the evidence data in a storage device. In case that the evidence data has been tampered with during a time between a timing of receiving the evidence data from the terminal device and a timing of registering the evidence data in the storage device, the hash value A and the hash value B take respectively different values, thereby registration of the evidence data will not be performed.
    Type: Application
    Filed: February 1, 2024
    Publication date: May 23, 2024
    Inventors: HARUHIKO NAMIKI, TAKUMA KAWAMURA, ATSUYA TANAKA, TAKAKAZU MURAKAMI, TATSUYA OKABE
  • Publication number: 20240097022
    Abstract: A semiconductor device includes a semiconductor part, first to third and control electrodes. The first electrode is provided on a back surface of the semiconductor part; and the second electrode is provided on a front surface thereof. The third electrode is provided between the first and second electrodes. The third electrode extends into the semiconductor part from the front surface side thereof. The third electrode is electrically insulated from the semiconductor part via an insulating space between the semiconductor part and the third electrode. The control electrode includes first and second portions. The first portion is linked to the second portion and extends between the semiconductor part and the third electrode. The second portion is provided between the second electrode and the third electrode. The first portion faces the insulating space via the third electrode; and the second portion extends between the insulating space and the second electrode.
    Type: Application
    Filed: February 2, 2023
    Publication date: March 21, 2024
    Inventors: Kentaro ICHINOSEKI, Keiko KAWAMURA, Tatsuya NISHIWAKI, Kohei OASA
  • Publication number: 20240083446
    Abstract: A database creation unit (154) accumulates, in a driving condition database (160), driving condition data wherein feature amounts representing features of driving operation, travelling environment information including travelling spots and road shapes, driver information including attributes of drivers and vehicle type information of vehicles, and whether the drivers have driving experiences of the vehicles are associated with driver identifiers. A driving characteristic estimation unit (155) estimates a driving characteristic of a driver presently driving a vehicle based on the driving condition database (160).
    Type: Application
    Filed: November 22, 2023
    Publication date: March 14, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya YOKOYAMA, Takahisa YAMAUCHI, Yoshitsugu KAWAMURA
  • Publication number: 20240074767
    Abstract: A hemostatic device that includes: a pressing member configured to compress the puncture site; and a first band, a second band, and a third band configured to be connected to the pressing member. The pressing member includes a pressing portion configured to compress the puncture site and a support member configured to fix the pressing portion. The support member has a first region in which the pressing portion is located, and a second region which is located outside the first region and to which the first band, the second band, and the third band are connectable. The first band and the second band have a center point in the first region when the first band and the second band slide in a state of being connected to the second region. The support member includes a projection protruding toward the pressing portion on a third band side of the first region.
    Type: Application
    Filed: November 13, 2023
    Publication date: March 7, 2024
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Tomoya KAWAMURA, Tatsuya OUCHI, Koki YAMASHITA, Yuna HIDAKA
  • Patent number: 11434977
    Abstract: A vehicle drive device that includes a rotary electric machine, a power transfer mechanism that transfers a rotational drive force between the rotary electric machine and a plurality of wheels, a case that houses at least a part of the power transfer mechanism and the rotary electric machine, and a hydraulic pump.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: September 6, 2022
    Assignees: AISIN CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsutoshi Takahashi, Yoshihiko Sasaki, Hiroki Nemoto, Tatsuya Kawamura, Kazunori Kaneko
  • Publication number: 20200271194
    Abstract: A vehicle drive device that includes a rotary electric machine, a power transfer mechanism that transfers a rotational drive force between the rotary electric machine and a plurality of wheels, a case that houses at least a part of the power transfer mechanism and the rotary electric machine, and a hydraulic pump.
    Type: Application
    Filed: July 27, 2017
    Publication date: August 27, 2020
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsutoshi TAKAHASHI, Yoshihiko SASAKI, Hiroki NEMOTO, Tatsuya KAWAMURA, Kazunori KANEKO
  • Patent number: 8932172
    Abstract: A differential includes a pinion shaft holder, a differential case, a first side gear, a second side gear, a first spring and a second spring. The differential case includes a first side boss portion and a second side boss portion. The first spring is interposed between the first side boss portion and the first side gear. The second spring is interposed between the second side boss portion and the second side gear. A recessed portion is provided on the pinion shaft holder and is configured to avoid interference with an auxiliary tool. The auxiliary tool maintains one of the first spring and the second spring in the compressed state.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: January 13, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Koichi Tanaka, Tatsuya Kawamura, Hiroya Mizuta, Koichi Nakamura, Rikiya Kubo, Yoshihiko Sasaki
  • Publication number: 20130225356
    Abstract: A differential includes a pinion shaft holder, a differential case, a first side gear, a second side gear, a first spring and a second spring. The differential case includes a first side boss portion and a second side boss portion. The first spring is interposed between the first side boss portion and the first side gear. The second spring is interposed between the second side boss portion and the second side gear. A recessed portion is provided on the pinion shaft holder and is configured to avoid interference with an auxiliary tool. The auxiliary tool maintains one of the first spring and the second spring in the compressed state.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 29, 2013
    Inventors: Koichi Tanaka, Tatsuya Kawamura, Hiroya Mizuta, Koichi Nakamura, Rikiya Kubo, Yoshihiko Sasaki
  • Patent number: 8172711
    Abstract: A hydraulic control apparatus of an automatic transmission having engagement pressure solenoid valves configured to regulate an engagement pressure supplied to a hydraulic servo of a frictional engagement element and to output the engagement pressures from a predetermined number of the engagement pressure solenoid valves to establish respective transmission gear speeds.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: May 8, 2012
    Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazunori Ishikawa, Kazuyuki Noda, Akihito Iwata, Yuhei Yoshioka, Tatsuya Kawamura, Koichi Miyamoto, Hideo Tomomatsu
  • Patent number: 7954394
    Abstract: A parking switching valve includes a spool that is movable to a first position and to a second position. The parking switching valve also has an oil chamber that generates a biasing force from a difference in the pressure receiving area between the land portions of the spool. The oil chamber has a second input port to which a line pressure is input while the spool is in the second position. Because the line pressure is input to the second input port, a biasing force is generated so that the spool is held in the second position against a spring. As a result, a parking device is held in a parking release state.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: June 7, 2011
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Yuhei Yoshioka, Kazuyuki Noda, Tatsuya Kawamura
  • Patent number: 7835843
    Abstract: An ECU executes a program that includes a step of determining whether an output shaft rotation speed NOUT is equal to or greater than a reference rotation speed at which determining regions with all of the gear speeds in a stepped automatic transmission do not overlap, a step of determining that there is an abnormality in the gear speed by dividing the turbine rotation speed NT by the output shaft rotation speed NOUT if the output shaft rotation speed NOUT is not equal to or greater than that reference rotation speed, and a step of determining that there is an abnormality in the gear speed by subtracting a value, which is obtained by multiplying the output shaft rotation speed NOUT by the gear ratio, from the turbine rotation speed NT if the output shaft rotation speed NOUT is equal to or greater than that reference rotation speed.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: November 16, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuya Kawamura, Toshio Sugimura, Hideo Masaki
  • Publication number: 20100229969
    Abstract: A hydraulic control apparatus of an automatic transmission having engagement pressure solenoid valves configured to regulate an engagement pressure supplied to a hydraulic servo of a frictional engagement element and to output the engagement pressures from a predetermined number of the engagement pressure solenoid valves to establish respective transmission gear speeds.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 16, 2010
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazunori ISHIKAWA, Kazuyuki Noda, Akihito Iwata, Yuhei Yoshioka, Tatsuya Kawamura, Koichi Miyamoto, Hideo Tomomatsu
  • Patent number: 7699748
    Abstract: An ECU executes a program that includes the steps of setting a line pressure to a line pressure (1) that is appropriate for improving fuel efficiency, if an automatic transmission is not shifting, and a deceleration slip control for a lock-up clutch is not being executed; setting the line pressure to a line pressure (2) that is equal to or lower than a line pressure (3) that is appropriate when the automatic transmission is shifting, if it is determined that the automatic transmission is not shifting, and the deceleration slip control is being executed; and setting the line pressure to the line pressure (3), if it is determined that the automatic transmission is shifting. The line pressure (1) is lower than the line pressure (2). The line pressure (2) is equal to or lower than the line pressure (3).
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: April 20, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuya Kawamura, Toshio Sugimura, Satoshi Ishida
  • Patent number: 7643924
    Abstract: An ECU executes a program that includes the steps of setting an abnormality flag when a hydraulic pressure switch is on even though a lock-up clutch is in a lock-up OFF state, forcing an SLU off when the lock-up clutch is on and the abnormality flag is on, determining that there is an SLU failure when the lock-up clutch is still in a lock-up ON state after a predetermined period of time has passed, and determining that there is a hydraulic pressure switch failure when the lock-up clutch is not in the lock-up ON state after the predetermined period of time has passed.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: January 5, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuya Kawamura, Toshio Sugimura, Hideo Masaki
  • Publication number: 20090071275
    Abstract: A parking switching valve includes a spool that is movable to a first position and to a second position. The parking switching valve also has an oil chamber that generates a biasing force from a difference in the pressure receiving area between the land portions of the spool. The oil chamber has a second input port to which a line pressure is input while the spool is in the second position. Because the line pressure is input to the second input port, a biasing force is generated so that the spool is held in the second position against a spring. As a result, a parking device is held in a parking release state.
    Type: Application
    Filed: September 12, 2008
    Publication date: March 19, 2009
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuhei Yoshioka, Kazuyuki Noda, Tatsuya Kawamura
  • Publication number: 20090005957
    Abstract: A control system includes a nonvolatile memory of an electronic controller, which stores information regarding operation characteristics of a hydraulic-pressure control valve that serves as an actuator in advance, and an electronic control unit that controls an operation of the hydraulic-pressure control valve based on the information. The electronic control unit is formed separately from the hydraulic-pressure control valve. The electronic controller is formed integrally with the hydraulic-pressure control valve. The control system and the actuator simplify a work for replacing the electronic control unit or the actuator.
    Type: Application
    Filed: June 23, 2008
    Publication date: January 1, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ken IMAMURA, Tatsuya Kawamura, Atsushi Honda
  • Patent number: 7468017
    Abstract: An ECT_ECU of the present invention executes a program including the step of setting a determination time T for determining the completion of an upshift in an accelerator off mode to a short determination time T (X) when a slip value NS (NS=NE?NT) between an engine revolution NE and a turbine revolution NT is smaller than a predetermined slip value NS (0) (when the difference between NT and NE is large, and the step of setting the determination time T to a long determination time T (Y) when the slip value NS (NS=NE?NT) is larger than the predetermined slip value NS (0) (when the difference between NT and NE is small).
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: December 23, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshio Sugimura, Toshinari Suzuki, Tatsuya Kawamura, Atsushi Ayabe
  • Patent number: 7415349
    Abstract: An ECU cuts off a fuel supply to an engine when a vehicle is decelerating. The ECU sets the cancellation of the fuel supply cut-off based on the target idle speed of the engine such that the power transfer state is prevented from switching from an engine driven state to an engine drive state even if the fuel supply to the engine is restarted. When the running condition of the vehicle satisfies the cancellation condition, the ECU then cancels the fuel supply cut-off to restart the fuel supply to the engine.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: August 19, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tsuyoshi Sato, Tatsuya Kawamura, Toshimitsu Sato
  • Patent number: 7366601
    Abstract: When a downshift instruction has been detected, the oil pressure of a lookup clutch is controlled, and the state of operation of the automatic transmission is detected. If a starting condition has been met, a slip rotation speed of the lockup clutch is calculated, and if the calculated slip rotation speed is greater than or equal to a reference rotation speed, the calculated slip rotation speed is set as a target slip rotation speed. If a condition for converging the target slip rotation speed has been met, the target slip rotation speed is then converged to a steady target rotation speed.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: April 29, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Ayabe, Toshio Sugimura, Tatsuya Kawamura
  • Publication number: 20080051982
    Abstract: An ECU cuts off a fuel supply to an engine when a vehicle is decelerating. The ECU sets the cancellation of the fuel supply cut-off based on the target idle speed of the engine such that the power transfer state is prevented from switching from an engine driven state to an engine drive state even if the fuel supply to the engine is restarted. When the running condition of the vehicle satisfies the cancellation condition, the ECU then cancels the fuel supply cut-off to restart the fuel supply to the engine.
    Type: Application
    Filed: August 1, 2007
    Publication date: February 28, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsuyoshi Sato, Tatsuya Kawamura, Toshimitsu Sato