Patents by Inventor Haruhiko Shibata

Haruhiko Shibata 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).

  • Vehicular internal gear type oil pump
    Patent number: 8956133
    Abstract: An oil pump includes a first spill passage formed on a side surface (60) of a pump chamber (58) to communicate a hydraulic pressure chamber (54) with a first high pressure discharge passage (68) when the entire hydraulic pressure chamber (54) is positioned between the first high pressure discharge passage (68) and a first low pressure discharge passage (70). Therefore, when the hydraulic pressure chamber (54) passes between the first high pressure discharge passage (68) and the first low pressure discharge passage (70), the hydraulic pressure inside the predetermined hydraulic pressure chamber (54) escapes to the first high pressure discharge passage (68) through a first spill passage (76), so a hydraulic pressure value inside the hydraulic pressure chamber (54) is maintained at the pressure value inside the first high pressure discharge passage (68).
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: February 17, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd., JTEKT Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Masashi Hattori, Masahiro Ito, Naoki Okoshi, Kenichi Mori, Masahiko Suzuki, Fumitake Suzuki, Hidenobu Yamaguchi, Haruhiko Shibata
  • Vehicular power transmitting system
    Patent number: 8801559
    Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 12, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Toyooki Kogyo Co., Ltd., JTEKT Corporation, Aisin AW Co., Ltd.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
  • VEHICULAR POWER TRANSMITTING SYSTEM
    Publication number: 20130170953
    Abstract: A vehicular power transmitting system including an oil pump constructed to sufficiently reduce a required drive torque. A high-pressure-port discharge amount of first and second high-pressure passages of the oil pump is determined such that an amount of consumption of working oil of relatively high pressure can be afforded only by the high-pressure-port discharge amount, during steady-state running of a vehicle in which engine speed is not lower than a predetermined threshold value corresponding to a predetermined lowest target input shaft speed of a continuously variable transmission for its shifting control. The pressure of the working oil discharged from first and second low-pressure discharge passages is kept at a predetermined low level, and the required drive torque of the oil pump is sufficiently reduced.
    Type: Application
    Filed: June 30, 2011
    Publication date: July 4, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., JTEKT Corporation, TOYOOKI KOGYO CO., LTD.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Haruhiko Shibata, Hidenobu Yamaguchi, Fumitake Suzuki, Masahiko Suzuki, Masashi Hattori, Naoki Okoshi, Kenichi Mori, Masahiro Ito
  • VEHICULAR INTERNAL GEAR TYPE OIL PUMP
    Publication number: 20130089453
    Abstract: An oil pump includes a first spill passage formed on a side surface (60) of a pump chamber (58) to communicate a hydraulic pressure chamber (54) with a first high pressure discharge passage (68) when the entire hydraulic pressure chamber (54) is positioned between the first high pressure discharge passage (68) and a first low pressure discharge passage (70). Therefore, when the hydraulic pressure chamber (54) passes between the first high pressure discharge passage (68) and the first low pressure discharge passage (70), the hydraulic pressure inside the predetermined hydraulic pressure chamber (54) escapes to the first high pressure discharge passage (68) through a first spill passage (76), so a hydraulic pressure value inside the hydraulic pressure chamber (54) is maintained at the pressure value inside the first high pressure discharge passage (68).
    Type: Application
    Filed: June 17, 2011
    Publication date: April 11, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOOKI KOGYO CO., LTD., JTEKT CORPORATION, AISIN AW CO., LTD.
    Inventors: Yusuke Ogata, Yoshihiro Mizuno, Masashi Hattori, Masahiro Ito, Naoki Okoshi, Kenichi Mori, Masahiko Suzuki, Fumitake Suzuki, Hidenobu Yamaguchi, Haruhiko Shibata