Patents by Inventor Yutaka Ogiwara

Yutaka Ogiwara 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).

  • Variable displacement vane pump
    Patent number: 9828991
    Abstract: A variable displacement vane pump includes a notch portion which is a flow path provided to extend from an initiating end of a discharge port towards a terminating end side of a suction port. The notch portion is formed so that a sectional area of the flow path is smaller than a sectional area of the discharge port at the initiating end thereof and that a length of the flow path in a circumferential direction is 1.5 pitches or larger. The terminating end of the suction port is a point where the vane in the suction area last overlaps the suction port. The initiating end of the discharge port is a point where the vane departed from the suction area first overlaps the discharge port. One pitch is a distance defied in the circumferential direction between adjacent vanes of the plurality of vanes.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: November 28, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Satoshi Muramatsu, Yutaka Ogiwara, Masaaki Aoki, Norikazu Kumasaka, Yoshiaki Kido
  • VARIABLE DISPLACEMENT VANE PUMP
    Publication number: 20160084249
    Abstract: A variable displacement vane pump includes a notch portion which is a flow path provided to extend from an initiating end of a discharge port towards a terminating end side of a suction port. The notch portion is formed so that a sectional area of the flow path is smaller than a sectional area of the discharge port at the initiating end thereof and that a length of the flow path in a circumferential direction is 1.5 pitches or larger. The terminating end of the suction port is a point where the vane in the suction area last overlaps the suction port. The initiating end of the discharge port is a point where the vane departed from the suction area first overlaps the discharge port. One pitch is a distance defied in the circumferential direction between adjacent vanes of the plurality of vanes.
    Type: Application
    Filed: March 17, 2015
    Publication date: March 24, 2016
    Applicant: HITACHI AUTOMOTIVE SYSTEMS STEERING, LTD.
    Inventors: Satoshi Muramatsu, Yutaka Ogiwara, Masaaki Aoki, Norikazu Kumasaka, Yoshiaki Kido
  • Control apparatus and control method for vehicle engine system
    Patent number: 7216028
    Abstract: An engine control unit that controls an engine and a fuel supply control unit that controls a fuel supply apparatus are disposed separately, and the antitheft process is performed individually by the respective control units.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: May 8, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Watanabe, Hajime Hosoya, Yutaka Ogiwara
  • Control apparatus and control method for vehicle engine system
    Publication number: 20050121977
    Abstract: An engine control unit that controls an engine and a fuel supply control unit that controls a fuel supply apparatus are disposed separately, and the antitheft process is performed individually by the respective control units.
    Type: Application
    Filed: December 2, 2004
    Publication date: June 9, 2005
    Inventors: Satoru Watanabe, Hajime Hosoya, Yutaka Ogiwara
  • System for detecting remaining amount of liquid in tank
    Patent number: 6857314
    Abstract: A liquid remaining-amount detecting system includes a displacement transmitting part for transmitting displacement of a float to a rotation-angle sensor and including a bracket mounted to the bottom of a tank, an arm having a base end mounted to the bracket and a front end mounted to the float, and a link mechanism for coupling the rotation-angle sensor and the base end of the arm. The link mechanism serves to cancel displacement of the float resulting from vertical displacement of the bottom of the tank.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: February 22, 2005
    Assignee: Hitachi Unisia Automotive, Ltd.
    Inventors: Hironori Ohhashi, Toru Mashimo, Yutaka Ogiwara
  • System for detecting remaining amount of liquid in tank
    Publication number: 20040221646
    Abstract: A liquid remaining-amount detecting system includes a displacement transmitting part for transmitting displacement of a float to a rotation-angle sensor and including a bracket mounted to the bottom of a tank, an arm having a base end mounted to the bracket and a front end mounted to the float, and a link mechanism for coupling the rotation-angle sensor and the base end of the arm. The link mechanism serves to cancel displacement of the float resulting from vertical displacement of the bottom of the tank.
    Type: Application
    Filed: December 30, 2003
    Publication date: November 11, 2004
    Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.
    Inventors: Hironori Ohhashi, Toru Mashimo, Yutaka Ogiwara