Patents by Inventor Yuki Ejiri

Yuki Ejiri 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: 20050120998
    Abstract: In a connecting structure between a rotary shaft and a metal plate and a method of connecting them together, in which the metal plate can be joined to the rotary shaft with a high degree of accuracy with high strength at a low manufacturing cost without causing eccentricity, inclination, or the like as far as possible, a large-diameter shaft portion and a small-diameter shaft portion are connected to each other with a predetermined difference in diameter so as to form therebetween a shoulder surface perpendicular to an axis of rotation, plural stripes of coining indents extending in a direction of shaft length are formed on the outer peripheral surface of the small-diameter shaft portion, a circular-shaped mount hole adapted to be fitted onto the small-diameter shaft portion is formed in the metal plate, the mount hole of the metal plate is press-fitted onto the small-diameter shaft portion so as to be subjected to plastic deformation by the coining indents, a portion surrounding the mount hole on one side su
    Type: Application
    Filed: September 24, 2004
    Publication date: June 9, 2005
    Inventors: Masayuki Kobayashi, Koji Harada, Keiichi Uraki, Yuki Ejiri
  • Publication number: 20040060541
    Abstract: The invention is intended to simplify a default mechanism of a throttle valve opening and closing device for the purpose of improving mountability of the device to a vehicle. When a motor generate no driving forces, a throttle valve is held in a position (1) by a return spring. In this position, gaps are formed between the throttle valve and a wall surface of an intake passage. Spherical recesses are formed in parts of the wall surface of the intake passage. In a position (2) where the throttle valve is opposed to the spherical recesses, the gaps are minimized in an operating range of the throttle valve.
    Type: Application
    Filed: September 26, 2003
    Publication date: April 1, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Masahiko Soshino, Takehiko Kowatari, Yuzo Kadomukai, Yuki Ejiri, Kenji Ono, Yasuhiro Kamimura, Norihiro Isozaki, Eisuke Wayama, Hitoshi Andoh, Yutaka Takeuchi
  • Patent number: 5188073
    Abstract: A fluid control valve which regulates a flow rate of a liquid and, more particularly, which controls a fluid by axially moving a valve body fixed to a valve shaft. The fluid control valve comprises a device for absorbing vibrations of the valve shaft in a direction perpendicular to the axis thereof. More specifically, there is provided a device for exerting a pressing force to lightly press the valve shaft against the inner walls of bearings. Alternatively, the valve shaft may be held between a plurality of elastic plates fixed on the inner surface of a valve casing.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: February 23, 1993
    Assignees: Hitachi Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Yuki Ejiri, Tsutomu Okazaki, Koichiro Yamada, Chiaki Niida, Hiroaki Saeki, Hideki Honma
  • Patent number: 4747380
    Abstract: A throttle valve control device for an internal combustion engine controls an opening degree of a throttle valve by electrically drivingly rotating a rotary shaft, to which fixed is the throttle valve, in response to an angular movement of a speed acceleration pedal. The control device is actuated only in case of emergency. The control device is provided with a throttle valve returning mechanism for imparting a torque to cause the rotary shaft to rotate in a direction in which the throttle valve is fully closed.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: May 31, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Yuki Ejiri, Tomoo Ito
  • Patent number: 4735179
    Abstract: A throttle valve is supported rotatably on a pipeline. The throttle valve is driven by a motor. A downstream side of the throttle valve is connected to an engine. A means for opening the throttle valve forcedly is provided so as not to allow a tar component in the fuel for driving the engine to stick on the throttle valve at an outer peripheral portion when the engine is shut down.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: April 5, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Yuki Ejiri, Tomoo Ito